U.S. patent application number 15/931317 was filed with the patent office on 2021-01-28 for color panel and display apparatus including the same.
The applicant listed for this patent is Samsung Display Co., Ltd.. Invention is credited to Jeaheon AHN, Seokjoon HONG, Jangil KIM, Jonghoon KIM.
Application Number | 20210028236 15/931317 |
Document ID | / |
Family ID | 1000004869172 |
Filed Date | 2021-01-28 |
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United States Patent
Application |
20210028236 |
Kind Code |
A1 |
KIM; Jangil ; et
al. |
January 28, 2021 |
COLOR PANEL AND DISPLAY APPARATUS INCLUDING THE SAME
Abstract
According to one or more embodiments, a color panel includes: a
substrate including a display area and a non-display area at least
partially surrounding the display area, the display area including
a plurality of pixel areas; a color filter layer arranged on the
substrate to transmit incident light of a particular wavelength
band; and a color conversion layer arranged on the color filter
layer and including a plurality of quantum dots to convert the
incident light into light of a particular wavelength band and to
output the converted light, wherein the color conversion layer
includes a dummy element that is apart from the display area and is
arranged in the non-display area.
Inventors: |
KIM; Jangil; (Yongin-si,
KR) ; KIM; Jonghoon; (Yongin-si, KR) ; AHN;
Jeaheon; (Yongin-si, KR) ; HONG; Seokjoon;
(Yongin-si, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Samsung Display Co., Ltd. |
Yongin-si |
|
KR |
|
|
Family ID: |
1000004869172 |
Appl. No.: |
15/931317 |
Filed: |
May 13, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01L 51/5268 20130101;
H01L 27/3272 20130101; H01L 27/3223 20130101; H01L 27/322 20130101;
H01L 2251/5369 20130101 |
International
Class: |
H01L 27/32 20060101
H01L027/32; H01L 51/52 20060101 H01L051/52 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 23, 2019 |
KR |
10-2019-0089207 |
Claims
1. A color panel comprising: a substrate comprising a display area
and a non-display area at least partially surrounding the display
area, the display area comprising a plurality of pixel areas; a
color filter layer on the substrate to transmit incident light of a
particular wavelength band; and a color conversion layer on the
color filter layer, the color conversion layer comprising a
plurality of quantum dots or light-scattering particles, wherein
the plurality of quantum dots are to convert the incident light
into converted light of a particular wavelength band, different
from the wavelength band of the incident light, and output the
converted light, wherein the light-scattering particles are to
transmit the incident light, and wherein the color conversion layer
further comprises, a dummy element that is apart from the display
area and is in the non-display area.
2. The color panel of claim 1, wherein the plurality of pixel areas
comprises a first pixel area, a second pixel area, and a third
pixel area, and the color conversion layer comprises: a first
element to cover the first pixel area, a second element to cover
the second pixel area, and a third element to cover the third pixel
area, wherein the third element comprises: a first portion in the
display area, and a second portion that is integral with the first
portion and is in the non-display area, and wherein the first
element, the second element, the third element, and the dummy
element are arranged apart from one another.
3. The color panel of claim 2, wherein the dummy element comprises
the same material as that of the first element, the second element,
and/or the third element.
4. The color panel of claim 1, further comprising a light-shielding
member between the substrate and the color conversion layer, the
light-shielding member being in the non-display area and between
any two of the plurality of pixel areas.
5. The color panel of claim 4, wherein the plurality of pixel areas
comprises a first pixel area, a second pixel area, and a third
pixel area, and the color filter layer comprises: a first color
filter to cover the first pixel area; a second color filter to
cover the second pixel area; and a third color filter to cover the
third pixel area, wherein the color panel further comprises: a
light-shielding color filter between the substrate and the
light-shielding member, the light-shielding color filter
corresponding to an area between the first pixel area and the
second pixel area, and the light-shielding color filter comprises
the same material as that of the third color filter.
6. The color panel of claim 5, wherein a portion of the third color
filter is between the substrate and the light-shielding member.
7. The color panel of claim 1, further comprising a dummy color
filter that is apart from the dummy element and is in at least in a
portion of the non-display area, wherein the dummy element is
between the display area and the dummy color filter.
8. The color panel of claim 2, wherein the first element, the
second element, the third element, and the dummy element each
correspond to any one of: a first color conversion element
comprising a plurality of quantum dots to convert the incident
light into light of a first wavelength band; a second color
conversion element comprising a plurality of quantum dots to
convert the incident light into light of a second wavelength band;
or a light-transmitting element comprising light-scattering
particles to transmit the incident light.
9. A display apparatus comprising: a display panel comprising a
plurality of emission elements; and a color panel on the display
panel and comprising a plurality of pixel areas to overlap the
plurality of emission elements, wherein the color panel further
comprises: a substrate comprising a display area and a non-display
area surrounding the display area, the display area comprising the
plurality of pixel areas; a light-shielding member arranged to
correspond to the non-display area; a color filter layer
transmitting incident light of a particular wavelength band; and a
color conversion layer on the color filter layer, wherein the color
conversion layer comprises a plurality of elements, and one of the
plurality of elements comprises a first portion located in the
display area and a second portion, integral with the first portion,
and located in the non-display area.
10. The display apparatus of claim 9, wherein the color conversion
layer comprises: a first color conversion element to convert the
incident light into light of a first wavelength band; a second
color conversion element to convert the incident light into light
of a second wavelength band; and a light-transmitting element.
11. The display apparatus of claim 10, wherein the one of the
plurality of elements comprises any one selected from the first
color conversion element, the second color conversion element, and
the light transmitting element.
12. The display apparatus of claim 10, further comprising: a dummy
element in the non-display area, wherein the dummy element is
arranged apart from the one of the plurality of elements.
13. The display apparatus of claim 12, wherein the color filter
layer comprises: a first color filter between the substrate and the
first color conversion element to transmit light of a first
wavelength band; a second color filter between the substrate and
the second color conversion element to transmit light of a second
wavelength band; and a third color filter between the substrate and
the light-shielding member to transmit light of a third wavelength
band.
14. The display apparatus of claim 13, wherein the dummy element
comprises the same material as that of at least one selected from
the first color conversion element, the second color conversion
element, the first color filter, and the second color filter.
15. A display apparatus comprising: a display panel comprising a
first emission element, a second emission element, and a third
emission element; and a color panel on the display panel, wherein
the color panel comprises: a substrate comprising a display area
and a non-display area at least partially surrounding the display
area, a color filter layer on the substrate to transmit incident
light of a particular wavelength band, and a color conversion layer
on the color filter layer, the color conversion layer comprising a
plurality of quantum dots or light-scattering particles, wherein
the plurality of quantum dots are to convert the incident light
into converted light of a particular wavelength band and output the
converted light, wherein the light-scattering particles are to
transmit the incident light, and wherein the color conversion layer
comprises, a first element to overlap a first emission element, a
second element to overlap a second emission element, a third
element to overlap a third emission element, and a dummy element in
at least a portion of the non-display area, wherein the first
element, the second element, the third element, and the dummy
element are apart from one another.
16. The display apparatus of claim 15, wherein a portion of the
third element of the color conversion layer extends toward the
non-display area and covers a portion of the non-display area.
17. The display apparatus of claim 15, wherein one selected from
the first element, the second element, and the third element
comprises first quantum dots to convert the incident light into
light of a wavelength band of a first color, another one selected
from the first element, the second element, and the third element
comprises second quantum dots to convert the incident light into
light of a wavelength band of a second color, and remaining one of
the first element, the second element, and the third element
comprises light-scattering particles.
18. The display apparatus of claim 17, wherein the dummy element
comprises: the same material as that of any one of the first
element, the second element, or the third element.
19. The display apparatus of claim 15, wherein the color filter
comprises: a first color filter to overlap the first element; a
second color filter to overlap the second element; and a third
color filter to overlap the third element, and the color panel
further comprises: a material portion between the first color
filter and the second color filter and comprising the same material
as that of the third color filter.
20. The display apparatus of claim 19, wherein the dummy element
comprises: the same material as that of any one or two color
filters from among the first color filter, the second color filter,
and the third color filter.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to and the benefit of
Korean Patent Application No. 10-2019-0089207, filed on Jul. 23,
2019, in the Korean Intellectual Property Office, the entire
content of which is incorporated herein by reference.
BACKGROUND
1. Field
[0002] One or more aspects of embodiments of the present disclosure
are directed toward a color panel and a display apparatus including
the color panel.
2. Description of Related Art
[0003] Display apparatus, which are apparatuses for visually
expressing data, are used for various purposes in various
fields.
[0004] Recently, due to diversification in purposes of the display
apparatuses, various product designs for improving quality of the
display apparatuses have been tried. Particularly, as the display
apparatuses have higher resolution, research to improve color gamut
of the display apparatuses has been actively performed. Recently,
by developing display apparatuses including color conversion
elements that include quantum dots, display apparatuses having
improved light efficiency and color gamut have been provided.
SUMMARY
[0005] In the color conversion elements arranged at a profile in
the display area of a related art display apparatus, due to
oxidization and/or deterioration, stains may be seen in the display
area, or furthermore, reliability errors may occur.
[0006] One or more aspects of embodiments of the present disclosure
are directed to a color panel having improved display
characteristic and reliability and to a display apparatus including
the color panel.
[0007] Additional aspects will be set forth in part in the
description which follows and, in part, will be apparent from the
description, or may be learned by practice of the presented
embodiments of the disclosure.
[0008] According to one or more embodiments, a color panel may
include a substrate including a display area including a plurality
of pixel areas and a non-display area at least partially
surrounding the display area, a color filter layer arranged on the
substrate and to transmit incident light of a particular wavelength
band, and a color conversion layer arranged on the color filter
layer and including a plurality of quantum dots or light-scattering
particles, wherein the plurality of quantum dots are to convert the
incident light into converted light of a particular wavelength
band, different from the wavelength band of the incident light, and
output the converted light, wherein the light-scattering particles
are to transmit the incident light, and wherein the color
conversion layer may further include a dummy element that is apart
from the display area and is in the non-display area.
[0009] The plurality of pixel areas may include a first pixel area,
a second pixel area, and a third pixel area, and the color
conversion layer may include a first element to cover a first pixel
area, a second element to cover a second pixel area, and a third
element to cover a third pixel area, wherein the third element is
integrally arranged at a portion of the display area and a portion
of the non-display area, and the first element, the second element,
the third element, and the dummy element may be separated from one
another.
[0010] The dummy element may include the same material as that of
the first element, the second element, and/or the third
element.
[0011] The color panel may further include a light-shielding member
between the substrate and the color conversion layer, the
light-shielding member being in the non-display area and between
any two of the plurality of pixel areas.
[0012] The color filter layer may include a first color filter to
cover a first pixel area, a second color filter to cover a second
pixel area, and a third color filter to cover a third pixel area,
wherein the color panel may further include a light-shielding color
filter between the substrate and the light-shielding member, the
light-shielding color filter corresponding to an area between the
first pixel area and the second pixel area, and the light-shielding
color filter may include the same material as that of the third
color filter.
[0013] A portion of the third color filter may be between the
substrate and the light-shielding member.
[0014] The color panel may further include a dummy color filter
that is apart from the dummy element and is in at least in a
portion of the non-display area, wherein the dummy element may be
between the display area and the dummy color filter.
[0015] The first element, the second element, the third element,
and the dummy element may each correspond to any one of: a first
color conversion element including a plurality of quantum dots to
convert the incident light into light of a first wavelength band, a
second color conversion element including a plurality of quantum
dots to convert the incident light into light of a second
wavelength band, or a light-transmitting element including
light-scattering particles to transmit the incident light.
[0016] According to one or more embodiments, a display apparatus
may include a display panel including a plurality of emission
elements, a color panel on the display panel and having a plurality
of pixel areas arranged to overlap the plurality of emission
elements, wherein the color panel further includes a substrate
including a display area and a non-display area surrounding the
display area, the display area including the plurality of pixel
areas, a light-shielding member arranged to correspond to the
non-display area, a color filter layer to transmit incident light
of a particular wavelength band, and a color conversion layer on
the color filter layer, wherein the color conversion layer may
include a plurality of elements, and one of the plurality of
elements may be arranged to extend from the display area to the
non-display area.
[0017] The color conversion layer may include a first color
conversion element to convert incident light into light of a first
wavelength band, a second color conversion element to convert
incident light into light of a second wavelength band, and a
light-transmitting element.
[0018] The one of the plurality of elements may include any one
selected from the first color conversion element, the second color
conversion element, and the light-transmitting element.
[0019] The display apparatus may further include a dummy element in
the non-display area, wherein the dummy element may be arranged
apart from the one of the plurality of elements.
[0020] The color filter layer may include a first color filter
between the substrate and the first color conversion element to
transmit light of a first wavelength band, a second color filter
between the substrate and the second color conversion element to
transmit light of a second wavelength band, and a third color
filter between the substrate and the light-shielding member to
transmit light of a third wavelength band.
[0021] The dummy element may include the same material as that of
at least one selected from the first color conversion element, the
second color conversion element, the first color filter, and the
second color filter.
[0022] According to one or more embodiments, a display apparatus
may include a first emission element, a second emission element, a
third emission element, a color panel on the display panel, wherein
the color panel may include a substrate including a display area
and a non-display area at least partially surrounding the display
area, a color filter layer on the substrate to transmit incident
light of a particular wavelength band, and a color conversion layer
on the color filter layer and including a plurality of quantum dots
or light-scattering particles, wherein the plurality of quantum
dots are to convert the incident light into converted light of a
particular wavelength band and output the converted light, wherein
the light-scattering particles are to transmit the incident light,
and wherein the color conversion layer may include a first element
to overlap a first emission element, a second element to overlap a
second emission element, a third element to overlap a third
emission element, and a dummy element in at least a portion of the
non-display area, wherein the first element, the second element,
the third element, and the dummy element may be arranged apart from
one another.
[0023] A portion of the third element of the color conversion layer
may extend toward the non-display area and cover a portion of the
non-display area.
[0024] One selected from the first element, the second element, and
the third element may include first quantum dots to convert the
incident light into light of a wavelength band of a first color,
another one selected from the first element, the second element,
and the third element may include second quantum dots to convert
the incident light into light of a wavelength band of a second
color, and remaining one of the first element, the second element,
and the third element may include light-scattering particles.
[0025] The dummy element may include that same material as that of
any one of the first element, the second element, or the third
element.
[0026] The color filter layer may include a first color filter to
overlap the first element, a second color filter to overlap the
second element, and a third color filter to overlap the third
element, and the color panel may further include a material portion
located between the first color filter and the second color filter
and including the same material as that of the third color
filter.
[0027] The dummy element may include the same material as that of
any one or two color filters selected from among the first color
filter, the second color filter, and the third color filter.
[0028] Other aspects, features, and advantages will be clearly
understood from drawings, claims, and detailed descriptions.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The above and other aspects, features, and advantages of
certain embodiments of the disclosure will be more apparent from
the following description taken in conjunction with the
accompanying drawings, in which:
[0030] FIG. 1A is a schematic top-plan view of a display apparatus
according to an embodiment;
[0031] FIG. 1B is a schematic cross-sectional view of the display
apparatus shown in FIG. 1A according to an embodiment;
[0032] FIG. 2A is a cross-sectional view of a color panel according
to an embodiment;
[0033] FIG. 2B is a cross-sectional view of a color panel according
to an embodiment;
[0034] FIG. 2C is a cross-sectional view of a color panel according
to an embodiment;
[0035] FIG. 3A is a cross-sectional view of a color panel according
to one or more embodiments of the present disclosure;
[0036] FIG. 3B is a cross-sectional view of a color panel according
to one or more embodiments of the present disclosure;
[0037] FIG. 3C is a cross-sectional view of a color panel according
to one or more embodiments of the present disclosure;
[0038] FIG. 3D is a cross-sectional view of a color panel according
to one or more embodiments of the present disclosure;
[0039] FIG. 4 is a cross-sectional view of a display apparatus
according to an embodiment;
[0040] FIG. 5 is an equivalent circuit diagram of a pixel circuit
included in a display apparatus according to an embodiment;
[0041] FIG. 6A is a cross-sectional view of a display apparatus
according to one or more embodiments of the present disclosure;
[0042] FIG. 6B is a cross-sectional view of a display apparatus
according to one or more embodiments of the present disclosure.
[0043] FIGS. 7A-7C are schematic diagrams of a display apparatus
according to one or more embodiments of the present disclosure.
DETAILED DESCRIPTION
[0044] As the present disclosure allows for various changes and
numerous embodiments, particular embodiments will be illustrated in
the drawings and described in more detail in the written
description. Advantages and features of the present disclosure and
methods of achieving the advantages and features will be described
more fully with reference to the accompanying drawings, in which
embodiments of the present disclosure are shown in more detail.
However, the present disclosure may be embodied in many different
forms and should not be construed as limited to the embodiments set
forth herein.
[0045] Reference will now be made in more detail to embodiments,
examples of which are illustrated in the accompanying drawings,
wherein like reference numerals refer to like elements throughout,
and overlapping description will be omitted.
[0046] It will be understood that although terms such as "first,"
"second" may be used herein to describe various components, these
components are not limited by these terms, and the terms are only
used to distinguish one component from one another.
[0047] As used herein, the singular forms "a," "an," and "the" are
intended to include the plural forms as well, unless the context
clearly indicates otherwise.
[0048] It will be further understood that the terms "includes,"
"including," "comprises," and/or "comprising" used herein specify
the presence of stated features or components, but do not preclude
the presence or addition of one or more other features or
components.
[0049] In embodiments, it will be understood that when a layer, an
area, or a component is referred to as being on another layer,
area, or component, the layer, area, or component may be directly
on the other layer, area, or component, or an intervening layer,
region, or component may be present therebetween. In contrast, when
a layer, an area, or a component is referred to as being "directly
on" another layer, area, or component, there are no intervening
elements present.
[0050] Sizes of components in the drawings may be exaggerated or
reduced for convenience of explanation. In other words, since sizes
and thicknesses of components in the drawings are arbitrarily
illustrated for convenience of explanation, the present disclosure
is not limited thereto.
[0051] When a certain embodiment may be differently implemented, a
specific process order may be performed differently from the
described order. For example, two consecutively described processes
may be performed substantially at the same time or performed in an
order opposite to the described order.
[0052] In the specification, "A and/or B" indicates A, B, or A and
B. "At least one of A and B" also indicates A, B, or A and B.
[0053] In the following embodiments, when a layer, region, or
component is connected to another layer, region, or component, the
layer, region, or component may be directly connected to the other
layer, region, or component, and may be indirectly connected to the
other layer, region, or component with another layer, region, or
component therebetween. For example, in the present specification,
when a layer, region, or component is electrically connected to
another layer, region, or component, the layer, region, or
component may be electrically connected in a direct manner to the
other layer, region, or component, and electrically connected in an
indirect manner to the other layer, region, or component with
another layer, region, or component therebetween.
[0054] In embodiments, x axis, y axis, and z axis are not limited
to three axes on a rectangular coordinate system and may be
interpreted to have a wider meaning. For example, the x axis, y
axis, and z axis may be orthogonal to one another but may also
indicate different directions that are not orthogonal to one
another.
[0055] FIG. 1A is a schematic top-plan view of a display apparatus
1000 according to an embodiment.
[0056] Referring to FIG. 1A, the display apparatus 1000 according
to one or more embodiments may include a display area DA, through
which an image may be output, and a non-display area NDA that is an
area except (that is not) the display area DA. For example, the
display apparatus 1000 may provide an image to outside by using
light emitted through the display area DA.
[0057] The display area DA may include a plurality of pixel areas
PA, for example, a first pixel area PA1, a second pixel area PA2,
and a third pixel area PA3. For example, the first pixel area PA1,
the second pixel area PA2, and the third pixel area PA3 may
respectively correspond to red, green, and blue pixels.
[0058] The pixel areas PA may each be systemically arranged in the
display area DA. FIG. 1A shows that the pixel areas PA are arranged
to construct columns and rows, but arrangement of the pixel areas
PA may be variously suitably modified. For example, the pixel areas
PA may be arranged in a Pentile type (e.g., a PenTile matrix).
[0059] The non-display area NDA may be provided to at least
partially surround the display area DA. According to an embodiment,
the non-display area NDA may be provided to entirely surround the
display area DA, as shown in FIG. 1A. According to another
embodiment, the non-display area NDA may also be provided to
partially surround an outline of the display area DA.
[0060] FIG. 1A shows the display apparatus 1000 in which the
display area DA is a rectangle, but the present disclosure is not
limited thereto. For example, a shape of the display area DA may be
a circle, an oval, and/or a polygon (such as a triangle and/or a
pentagon). The display apparatus 1000 of FIG. 1A may be embodied
(utilized) in various display apparatuses, such as a flexible
display apparatus, a foldable display apparatus, and/or a rollable
display apparatus.
[0061] FIG. 1B is a schematic cross-sectional view of the display
apparatus 1000 shown in FIG. 1A according to an embodiment.
[0062] Referring to FIG. 1B, the display apparatus 1000 may include
a display panel 400 and a color panel 100 arranged on the display
panel 400.
[0063] The display panel 400 may include a plurality of pixels (for
example, PX1, PX2, and PX3) emitting light based on an electrical
signal. Light emitted through the display panel 400 may be
irradiated toward the color panel 100, and light L1, L2, and L3
transmitted through the color panel 100 may be output to the
outside.
[0064] Each pixel in the display panel 400 may include an emission
element emitting light and a pixel circuit for controlling the
emission element. For example, the display panel 400 may include an
organic light-emitting diode (OLED) as an emission element.
[0065] Hereinafter, the display apparatus 1000 according to one or
more embodiments is described as an organic light-emitting display
apparatus as an example, but the present disclosure is not limited
thereto. For example, the display apparatus 1000 according to one
or more embodiments may be an inorganic light-emitting display that
includes an inorganic light-emitting diode as an emission element,
or a quantum dot light-emitting display that includes quantum dots
as emission elements. For example, an emission layer of the
emission element provided in the display panel 400 may include an
organic material, an inorganic material, quantum dots, an organic
material and quantum dots, an inorganic material and quantum dots,
or at least one of each of an organic material, an inorganic
material, and quantum dots. In some embodiments, the display
apparatus 1000 may be a liquid crystal display device (LCD)
including a backlight unit and a liquid crystal layer.
[0066] The color panel 100 may include at least one of the color
filter or color conversion element in areas that overlap the pixels
PX1, PX2, and PX3 of the display panel 400. For example, the light
incident on the color panel 100 may be converted or transmitted and
output to outside based on characteristics of at least one of the
color filter or color conversion element. For example, the display
apparatus 1000 may output light L1, L2, and L3 having different
color characteristics according to pixels, according to
characteristics of the color panel 100 overlapping each of the
pixels.
[0067] FIG. 2A is a cross-sectional view of the color panel
according to an embodiment.
[0068] For example, FIG. 2A may be a schematic cross-sectional view
of a color panel 100 when the display apparatus 1000 shown in FIG.
1A is cut along line I-I'.
[0069] Referring to FIG. 2A, the color panel 100 according to one
or more embodiments may include a substrate 110, a color filter
layer 120, a color conversion layer 140, and a planarization layer
150.
[0070] The substrate 110 may include a display area DA, which
includes a plurality of pixel areas (for example, a first pixel
area PA1, a second pixel area PA2, and a third pixel area PA3)
spaced apart from one another, and a non-display area NDA that does
not include a pixel area.
[0071] The color conversion layer 140 may include the color
conversion elements including a plurality of quantum dots that
convert light Li, which is incident on the color panel 100, into
lights L1, L2, and L3 in particular (or set) wavelength bands.
[0072] The color conversion layer 140 may include a first element
142, a second element 144, a third element 146, and a dummy element
148.
[0073] For example, in the display area DA, the color conversion
layer 140 may include the first element 142 that covers the first
pixel area PA1, the second element 144 that covers the second pixel
area PA2, and the third element that covers the third pixel area
PA3.
[0074] The first element 142 may be a first color conversion
element that includes first quantum dots for converting incident
light Li to light L1 of a first wavelength band and outputting the
converted light.
[0075] The second element 144 may be a second color conversion
element that includes second quantum dots for converting the
incident light Li to light L2 of a second wavelength band and
outputting the converted light.
[0076] A size and structure of the first quantum dots may be
different from a size and structure of the second quantum dots. For
example, the first quantum dots and the second quantum dots may
respectively have different particle sizes and thus emit light L1
and L2 having different color characteristics to outside. For
example, the light L1 in the first wavelength band and the light L2
in the second wavelength band may each have a wavelength value
greater than that of the incident light Li.
[0077] The third element 146 may be a light-transmitting element
that includes light-scattering particles transmitting the incident
light Li and does not include particular quantum dots. For example,
a wavelength band of light output through the third element 146 may
be identical to a wavelength band of the incident light Li that is
incident on the third element 146.
[0078] For example, the light L1 output through the first pixel
area PA1 may have a wavelength corresponding to red light, the
light L2 output through the second pixel area PA2 may have a
wavelength corresponding to green light, and the light L3 output
through the third pixel area PA3 may have a wavelength
corresponding to blue light.
[0079] The color conversion element (for example, the first color
conversion element and/or the second color conversion element) may
include a photosensitive polymer in which quantum dots and
light-scattering particles are distributed. The quantum dots may
convert the incident light Li into light of a particular wavelength
band and output the converted light. The photosensitive polymer may
be an organic material having light transmissivity. The
light-scattering particles may scatter a portion of the incident
light Li that is not absorbed by the quantum dots to allow a
greater number of quantum dots to be excited, thereby increasing a
color conversion rate of the color conversion element. For example,
the light-scattering particles may include titanium oxide
(TiO.sub.2) and/or a metal particle.
[0080] A core of the quantum dot may be selected from among a Group
II-VI compound, a Group III-V compound, a Group IV-VI compound, a
Group IV element, a Group IV compound, and combinations
thereof.
[0081] The Group II-VI compound may be selected from among: a
two-element compound selected from among CdSe, CdTe, ZnS, ZnSe,
ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and combinations thereof; a
three-element compound selected from among CdSeS, CdSeTe, CdSTe,
ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe,
CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZns, and
combinations thereof; and a four-element compound selected from
among HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe,
CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and combinations thereof.
[0082] The Group III-V compound may be selected from among: a
two-element compound selected from GaN, GaP, GaAs, GaSb, AlN, AlP,
AlAs, AlSb, InN, InP, InAs, InSb, and combinations thereof; a
three-element compound selected from among GaNP, GaNAs, GaNSb,
GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb,
InPAs, InPSb, GaAlNP and combinations thereof; and a four-element
compound selected from among GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb,
GaInNP, GaInAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs,
InAlNSb, InAlPAs, InAlPSb, and combinations thereof.
[0083] The Group IV-VI compound may be selected from among: a
two-element compound selected from among SnS, SnSe, SnTe, PbS,
PbSe, PbTe, and combinations thereof; a three-element compound
selected from SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS,
SnPbSe, SnPbTe, and combinations thereof; and a four-element
compound selected from among SnPbSSe, SnPbSeTe, SnPbSTe, and
combinations thereof. The Group IV element may be selected from
among Si, Ge, and a combination thereof. The Group IV compound may
be two-element compound selected from among SiC, SiGe, and a
combination thereof.
[0084] In one or more embodiments, the two-element compound, the
three-element compound, and the four-element compound may each
independently be in particles in uniform concentrations or be in
the same particle in a state of being partially divided according
to different concentrations. The quantum dot may also have a
core-shell structure in which one quantum dot surrounds another
quantum dot. The interface between the core and the shell may have
a concentration gradient in which a concentration of an element in
the shell decreases toward a center.
[0085] In some embodiments, the quantum dot may have a core-shell
structure that includes a core including the above-described
nanocrystal and a shell surrounding the core. The shell of the
quantum dot may serve as a protective layer for preventing (or
reducing) chemical change of the core, and may maintain properties
of the semiconductor and/or a charging layer for giving an
electrophoretic property to the quantum dot. The shell may include
a single layer or a multi-layer. The interface between the core and
the shell may have a concentration gradient in which a
concentration of an element in the shell decreases toward a center.
The shell in the quantum dot may include, for example, an oxide of
a metal or a non-metal, a semiconductor compound, a combination
thereof, and/or the like.
[0086] For example, the oxide of metal or a non-metal may include a
two-element compound such as SiO.sub.2, Al.sub.2O.sub.3, TiO.sub.2,
ZnO, MnO, Mn.sub.2O.sub.3, CuO, FeO, Fe.sub.2O.sub.3,
Fe.sub.3O.sub.4, CoO, Co.sub.3O.sub.4, and/or NiO, and/or a
three-element compound such as MgAl.sub.2O.sub.4,
CoFe.sub.2O.sub.4, NiFe.sub.2O.sub.4, and/or CoMn.sub.2O.sub.4, but
the present embodiment is not limited thereto.
[0087] The semiconductor compound may include, for example, Cds,
CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS,
HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, and/or the
like, but the present embodiment is not limited thereto.
[0088] The quantum dot may have a full width of half maximum (FWHM)
of about 45 nm or less, for example, about 40 nm or less, or about
30 nm or less, and color purity or color gamut may be enhanced in
the above-mentioned range. In addition, as light emitted from the
quantum dot is irradiated in all directions, field angle of light
may widen.
[0089] A shape of the quantum dot may be any suitable shape used in
the technical field and is not particularly limited. For example,
the shape of the quantum dot may include a sphere, a pyramid shape,
a multi-arm shaped and/or a cubic-shaped nano particle, nano tube,
nano wire, nano fabric, nano laminar particle, and/or the like.
[0090] Colors of emitted light may be adjusted according to sizes
of particles of quantum dots, and thus, the quantum dots may have
various suitable emission colors such as blue, red, and green.
[0091] The color conversion layer 140 may include at least one
dummy element 148 located in the non-display area NDA. The dummy
element 148 may be arranged apart from the display area DA. In some
embodiments, the dummy element 148, the first element 142, the
second element 144, and the third element 146 may be arranged apart
from one another.
[0092] The dummy element 148 may include the same material as one
of elements (for example, the first element 142, the second element
144, and/or the third element 146) of the color conversion layer
140 provided in the display area DA. For example, the dummy element
148 may include the same material as any one of the first color
conversion element, the second color conversion element, and/or the
light-transmitting element.
[0093] In an example, the dummy element 148 may include a
photosensitive polymer, in which quantum dots (for example, any one
of the first quantum dots and the second quantum dots) and the
light-scattering particles are distributed. In another example, the
dummy element 148 may include a photosensitive polymer, in which
light-scattering particles are distributed, but may not include
quantum dots.
[0094] For example, the dummy element 148 may include the same
material as a particular element (for example, the first element
142, the second element 144, and/or the third element 146) covering
the pixel areas PA, based on arrangement rules of the pixel areas
PA in the display area DA. According to an embodiment, when pixel
areas PA corresponding to red, green, and blue colors are
alternatively arranged in the display area DA, and a pixel area
corresponding to blue color is arranged at an end portion of the
display area DA, the dummy element 148 of the non-display area NDA
adjacent to the pixel area PA corresponding to blue color may
include the same material as an element covering a pixel area PA
corresponding to red color.
[0095] According to one or more embodiments of the present
disclosure, by including the dummy element 148 arranged in the
non-display area NDA, the color panel 100 may prevent (or reduce)
deterioration of each element (for example, the third element 146
adjacent to the dummy element 148) of the color conversion layer
140 covering the pixel area PA, and may minimize (or reduce) stains
caused due to the elements in the display area DA.
[0096] In a related art color panel that does not include the dummy
element (e.g., the dummy element 148 shown in FIG. 2A), in the
forming of the conversion layer of the color panel, a profile of an
element arranged at an edge of the display area (for example, where
the third element 146 shown in FIG. 2A is arranged) may have a
different form than a profile of an element arranged in a center
portion of the display area (for example, where the first element
142 and/or the second element 144 shown in FIG. 2A are arranged).
In this case, defects may occur during a process of forming a
capping layer on the color conversion layer and cause deterioration
of components provided in the color panel. According to one or more
embodiments of the present disclosure, the color panel 100 may
include the dummy element 148 to improve reliability problems due
to the deterioration stated above.
[0097] The light-shielding member 130 may be located in
correspondence (to correspond) to an area between each of the pixel
areas (for example, PA1, PA2, and PA3) of the display area DA and
the non-display area NDA. The light-shielding member 130 may be
interposed between the substrate 110 and the color conversion layer
140. The light-shielding member 130 may include, for example, a
black matrix, a black pigment, a metal material, and/or the like.
In some embodiments, the light-shielding member 130 may include a
material having a reflective characteristic.
[0098] The color filter layer 120 may be interposed between the
substrate 110 and the color conversion layer 140 and may include
color filters 122, 124, and 126 that selectively transmit light of
a particular wavelength band. The color filters 122, 124, and 126
may be located in correspondence (to correspond) to the plurality
of pixel areas PA (for example, PA1, PA2, and PA3) provided in the
display area DA. For example, as shown in FIG. 2A, the color
filters 122, 124, and 126 respectively located in correspondence to
the plurality of pixel areas PA1, PA2, and PA3 may be spaced apart
from one another with the light-shielding member 130
therebetween.
[0099] The color filter layer 120 may include a first color filter
122 that covers the first pixel area PA1, a second color filter 142
that covers the second pixel area PA2, and a third color filter 126
that covers the third pixel area PA3.
[0100] For example, the first color filter 122 may selectively
transmit the light of the first wavelength band, the second color
filter 124 may selectively transmit the light of the second
wavelength band, and the third color filter 126 may selectively
transmit the light of the third wavelength band. The light of the
first wavelength band may correspond to red light, the light of the
second wavelength band may correspond to green light, and the light
of the third wavelength band may correspond to blue light.
[0101] According to an embodiment, the color panel 100 may further
include a light-shielding color filter 226. The light-shielding
color filter 226 may be arranged between the plurality of pixel
areas. For example, the light-shielding color filter 226 may be
arranged between the first pixel area PA1 and the second pixel area
PA2 as shown in FIG. 2A. The first color filter 122 and the second
color filter 124 may be spaced apart from each other by the
light-shielding color filter 226 and the light-shielding member 130
stacked on the light-shielding color filter 226. The
light-shielding color filter 226 may serve as an auxiliary
light-shielding element such that light is not emitted from an area
between the first pixel area PA1 and the second pixel area PA2. The
light-shielding color filter 226 may include the same material as
the third color filter 126.
[0102] According to one or more embodiments, in the color panel
100, a portion of the first color filter 122 and a portion of the
second color filter 124 may be arranged with (e.g.,
side-contacting) the light-shielding member 130. In addition, a
portion of the light-shielding member 130 may be arranged on the
third color filter 126. In other words, a portion of the third
color filter 126 may be located between the substrate 110 and the
light-shielding member 130 (in the thickness direction or z-axis
direction).
[0103] The capping layer 145 and the planarization layer 150 may be
arranged to cover each element of the color conversion layer
140.
[0104] The capping layer 145 may include a transmissive inorganic
insulating material. For example, the capping layer 145 may include
a material such as silicon oxide (SiO.sub.x), silicon nitride
(SiN.sub.x), and/or silicon oxynitride (SiON).
[0105] The planarization layer 150 may planarize a surface of the
substrate 110 on which the color conversion layer 140 is arranged.
The planarization layer 150 may include a transparent material such
that the incident light Li is irradiated toward the color
conversion layer 140. For example, the planarization layer 150 may
include a transparent organic material such as a polyimide resin,
an acryl resin, and/or a resist material. The planarization layer
150 may be formed by a wet process (such as a slit coating method
and/or a spin coating method), and/or a dry process (such as a
chemical vapor deposition method and/or a vacuum deposition
method). However, embodiments of the present disclosure are not
limited to materials and forms stated above.
[0106] FIG. 2B is a cross-sectional view of the color panel 100
according to another embodiment. For example, FIG. 2B may be a
cross-sectional view of the color panel 100 when the display
apparatus 1000 shown in FIG. 1 is taken (cut) along line I-I'.
[0107] According to one or more embodiments, at least one element
covering a particular pixel area adjacent to the non-display area
NDA may extend from the display area DA toward the non-display area
NDA to cover a portion of the non-display area NDA.
[0108] For example, as shown in FIG. 2B, the third element 146 that
covers the third pixel area PA3 may include a portion located in
the display area DA and a portion located in the non-display area
NDA. The portion of the third element 146 located in the display
area DA may be integral with the portion of the third element 146
located in the non-display area NDA. In other words, the third
element 146 may be arranged to extend from a portion of the display
area DA to the non-display area NDA.
[0109] As shown in FIG. 2B, the color panel 100 may further include
the dummy element 148 that is apart from the third element 146 and
arranged in the non-display area NDA. Description of the dummy
element 148 may be the same as the one provided with reference to
FIG. 2A.
[0110] According to another embodiment, the color panel 100 may not
include the dummy material 148.
[0111] FIG. 2C is a cross-sectional view of the color panel 100
according to another embodiment. For example, FIG. 2C may be a
cross-sectional view of the color panel 100 when the display
apparatus 1000 shown in FIG. 1 is taken (cut) along line I-I'.
[0112] Referring to FIG. 2C, the color panel 100 according to an
embodiment may further include a dummy color filter 120'.
[0113] The dummy color filter 120' may be arranged apart from the
dummy element 148 (for example, the dummy element 148 shown in FIG.
2A) in a portion of the non-display area NDA. In other words, the
dummy element 148 may be arranged between the third element 146 and
the dummy color filter 120'.
[0114] The dummy color filter 120' may include the same material as
at least one selected from the color filters 122, 124, and 126
included in the color filter layer 120 (and the plurality of
elements 142, 144, and 146).
[0115] For example, the dummy color filter 120' may include a
double-layer structure in which a first dummy color filter 122'
including the same material as the first color filter 122 and a
second dummy color filter 124' including the same material as the
second color filter 124 are stacked.
[0116] In some embodiments, the dummy color filter 120' may include
a single layer structure including any one of the first dummy color
filter 122' or the second dummy color filter 124'.
[0117] The color panel 100 may include the dummy element 148
arranged in the non-display area NDA. Description of the dummy
element 148 may be the same as the one provided with reference to
FIG. 2A.
[0118] The dummy element 148 and the dummy color filter 120' may be
arranged in the non-display area NDA apart from the display area
DA, but arrangement order is not limited to the structure shown in
FIG. 2C. For example, the dummy element 148 may be arranged between
the third element 146 and the dummy color filter 120' in the
non-display area NDA (in the x-axis direction). In some
embodiments, the dummy element 148 may be arranged to overlap the
dummy color filter 120' (in the z-axis direction).
[0119] According to one or more embodiments, the color panel 100 is
not limited to the structures shown in FIGS. 2A to 2C and may have
structures of various suitable combinations.
[0120] For example, the color panel 100 may have a structure as
that of the color panel 100 shown in FIG. 2C, without the dummy
element 148. As another example, the color panel 100 may have a
structure as that of the color panel 100 shown in FIG. 2A, wherein
the dummy color filter 120' that is apart from the dummy element
148 and arranged in the non-display area NDA is further included in
the structure. In some embodiments, the color panel 100 may have a
structure as that of the color panel 100 shown in FIG. 2A, wherein
the dummy color filter 120' is arranged instead of the dummy
element 148 in the structure.
[0121] FIGS. 3A through 3D are cross-sectional views of the color
panel 100 according to one or more embodiments of the present
disclosure. For example, FIGS. 3A to 3D may be cross-sectional
views of the color panel 100 when the display apparatus 1000 shown
in FIG. 1 is cut along line II-II'.
[0122] Referring to FIG. 3A, the color panel 100 may include the
substrate 110, a color filter 220, and an element 240.
[0123] The substrate 110 may include the display area DA and the
non-display area NDA. The color panel 100 may further include the
light-shielding member 130 that is interposed between the substrate
110 and the color filter 220 and arranged in correspondence (to
correspond) to the non-display area NDA. In addition, the color
panel 100 may further include the light-shielding color filter 226
that is interposed between the substrate 110 and the
light-shielding member 130 and serves as the auxiliary
light-shielding element in an area. The light-shielding color
filter 226 may include a material that may selectively transmit the
light of the third wavelength band, and may cover at least a
portion of the pixel areas PA included in the display area DA. For
example, the portion of the pixel areas PA covered by the
light-shielding color filter 226 may correspond to the pixel area
emitting blue light.
[0124] As shown in FIG. 3A, the color filter 220 may extend from
the display area DA to the non-display area NDA to cover a portion
of the non-display area NDA. For example, the color filter 220 may
include a portion located in the display area DA and a portion
located in the non-display area NDA, and the portion located in the
display area DA and the portion located in the non-display area NDA
may be integral with each other. The color filter 220 may include
the same material as any one of the first color filter (for
example, the first color filter 122 shown in FIG. 2A) that may
selectively transmit the light of the first wavelength band or the
second color filter (for example, the second color filter 124) that
may selectively transmit the light of the second wavelength
band.
[0125] The color filter 220 may cover a portion of pixel areas PA
in the display area DA. For example, the portion of pixel areas PA
covered by the color filter 220 may correspond to a pixel area
emitting red light and/or green light.
[0126] The element 240 may be interposed between the color filter
220 and the planarization layer 150. The element 240 may include a
first portion 240a located in the display area DA. In addition, the
element 240 may include a second portion 240b that is integral with
the first portion 240a and is located in the non-display area NDA.
The element 240 may be arranged on the color filter 220 in
correspondence (to correspond) to at least a portion of an area in
which the color filter 220 is formed.
[0127] The element 240 may include the same material as the first
color conversion element (that converts the incident light into the
light of the first wavelength band and outputs the converted light)
or the second color conversion elements (that converts the incident
light into the light of the second wavelength band and outputs the
converted light).
[0128] Referring to FIG. 3B, the color panel 100 may further
include a dummy element 240' interposed between the light-shielding
member 130 and the planarization layer 150.
[0129] The dummy element 240' may be located in the non-display
area NDA and arranged apart from the element 240 by a distance. For
example, the dummy element 240' may be arranged at a distance of
about 5 um to about 15 um from the element 240.
[0130] The dummy element 240' may include the same material as the
element 240. For example, the dummy element 240' may include the
same material as the first color conversion element or the second
color conversion element on the display area DA.
[0131] Referring to FIG. 3C, the dummy element 240' may be
interposed between the color filter 220, which extends to the
non-display area NDA, and the planarization layer 150.
[0132] The dummy element 240' according to various embodiments of
the present disclosure may be arranged in a portion of the
non-display area NDA in which the color filter 220 is not formed,
as shown in FIG. 3B, or arranged in a portion of the non-display
area NDA in which the color filter 220 is formed, as shown in FIG.
3C.
[0133] Referring to FIG. 3D, the color panel 100 may further
include a dummy color filter 220' interposed between the
light-shielding member 130 and the planarization layer 150.
[0134] The dummy color filter 220' may be interposed between the
light-shielding member 130 and the planarization layer 150 in the
non-display area NDA. The dummy color filter 220' may be arranged
apart from each of the element 240 and the dummy element 240'. As
shown in FIG. 3D, the dummy element 240' may be arranged between
the element 240 and the dummy color filter 220'.
[0135] In another embodiment, the dummy color filter 220' may be
further provided between the color filter 220 and the planarization
layer 150 in the color panel 100 shown in FIG. 3C. For example, the
dummy color filter 220' may be arranged apart from the dummy
element 240'. The dummy element 240' may be arranged between the
element 240 and the dummy color filter 220'.
[0136] The dummy color filter 220' may include at least one of the
first color filter (that selectively transmits the light of the
first wavelength band) or the second color filter (that selectively
transmits the light of the second wavelength band). For example,
the dummy color filter 220' may include a single layer structure
including the same material as any one of the first color filter or
the second color filter, or may include a double-layer structure
including the same material as the first color filter and/or the
second color filter. For example, the dummy color filter 220' may
include the same material as the color filter 220.
[0137] FIG. 4 is a cross-sectional view of the display apparatus
1000 according to an embodiment. FIG. 4 may be a cross-sectional
view of the display apparatus 1000 when the display apparatus 1000
of FIG. 1 is cut along line II-II'.
[0138] Referring to FIG. 4, the display apparatus 1000 may include
the display panel 400 and the color panel 100 arranged on the
display panel 400.
[0139] The display panel 400 may include a lower substrate 410 and
a plurality of pixels arranged on the lower substrate 410. The
plurality of pixels may each include a pixel circuit PC, including
a thin-film transistor, and an emission element (for example, an
organic light-emitting diode OLED) electrically connected to the
pixel circuit PC.
[0140] The lower substrate 410 may include glass and/or a polymer
resin. The polymer resin may include polyethersulfone (PES),
polyarylate (PAR), polyetherimide (PEI), polyethylene naphthalate
(PEN), polyethylene terephthalate (PET), polyphenylene sulfide
(PPS), polyimide (PI), polycarbonate (PC), cellulose acetate
propionate (CAP), and/or the like. For example, the substrate 410
including the above-stated polymer resin may be flexible, rollable,
and/or bendable. The substrate 410 may have a multi-layer structure
including a layer, which includes the above-stated polymer resin,
and an inorganic layer. For example, the substrate 410 may include
a multi-layer structure including a first polymer resin layer and a
second polymer resin layer. An inorganic layer may be interposed
between the first polymer resin layer and the second polymer resin
layer.
[0141] A semiconductor layer A may include amorphous silicon. In
some embodiments, the semiconductor layer A may include an oxide
semiconductor including indium (In), gallium (Ga), stannum (Sn),
zirconium (Zr), vanadium (V), hafnium (Hf), cadmium (Cd), germanium
(Ge), chromium (Cr), titanium (Ti), and/or zinc (Zn). For example,
the semiconductor layer A may include an oxide semiconductor such
as indium gallium zinc oxide (IGZO), zinc tin oxide (ZTO), and/or
zinc indium oxide (ZlO).
[0142] A gate electrode G is arranged above the semiconductor layer
A with a gate insulating layer 413 therebetween. The gate electrode
G may include molybdenum (Mo), aluminum (Al), copper (Cu), titanium
(Ti), and/or the like, and may include a single layer or a
multi-layer. For example, the gate electrode G may be a single Mo
layer.
[0143] The gate insulating layer 413 may include silicon oxide
(SiO.sub.2), silicon nitride (SiN.sub.x), silicon oxynitride
(SiON), aluminum oxide (Al.sub.2O.sub.3), titanium oxide
(TiO.sub.2), tantalum oxide (Ta.sub.2O.sub.5), hafnium oxide
(HfO.sub.2), zinc oxide (ZnO.sub.2), and/or the like.
[0144] A source electrode S and/or a drain electrode D may be
arranged above the gate electrode G with an interlayer insulating
layer 415 therebetween. The source electrode S and/or the drain
electrode D may include Mo, Al, Cu, Ti, and/or the like, and may
include a single layer or a multi-layer. For example, the source
electrode S and/or drain electrode D may have a Ti/Al/Ti
multi-layer structure.
[0145] A lower planarization layer 417 may cover an upper surface
of the source electrode S and/or the drain electrode D and may have
an even (or substantially even) upper surface such that a pixel
electrode 440 may be formed evenly. The lower planarization layer
417 may include a single layer or a multi-layer including an
organic material. The lower planarization layer 417 may include a
commercial polymer (like benzocyclobutene (BCB), polyimide,
hexamethyldisiloxane (HMDSO), polymethylmethacrylate (PMMA), and/or
polystyrene (PS)), a polymer derivative having a phenolic group, an
acryl-based polymer, an imide-based polymer, an acrylether-based
polymer, an amide-based polymer, a fluoride-based polymer, a
p-xylene-based polymer, a vinylalcohol-based polymer, a blend
thereof, and/or the like. The planarization layer 417 may include
an inorganic material. The lower planarization layer 417 may
include silicon oxide (SiO.sub.2), silicon nitride (SiN.sub.x),
silicon oxynitride (SiON), aluminum oxide (Al.sub.2O.sub.3),
titanium oxide (TiO.sub.2), tantalum oxide (Ta.sub.2O.sub.5),
hafnium oxide (HfO.sub.2), zinc oxide (ZnO.sub.2), and/or the like.
When the lower planarization layer 417 includes an inorganic
material, chemical planarization polishing may be performed
depending on occasions. In some embodiments, the lower
planarization layer 417 may include both an organic material and an
inorganic material.
[0146] A pixel electrode 440 may include a (semi)transmissive
electrode or a reflective electrode. In some embodiments, the pixel
electrode 440 may include a reflective film including silver (Ag),
magnesium (Mg), Al, platinum (Pt), palladium (Pd), gold (Au),
nickel (Ni), neodymium (Nd), iridium (Ir), Cr, a combination
thereof, and/or the like, and a transparent or semi-transparent
electrode formed on the reflective film. The transparent or
semi-transparent electrode layer may include at least one material
selected from among indium tin oxide (ITO), indium zinc oxide
(IZO), zinc oxide (ZnO), indium oxide (In.sub.2O.sub.3), indium
gallium oxide (IGO), and aluminum zinc oxide (AZO). In some
embodiments, the pixel electrode 440 may include an ITO/Ag/ITO
stack structure.
[0147] A pixel defining layer 430 may be arranged on the lower
planarization layer 417. The pixel defining layer 430 may define an
emission area of each pixel by having an opening that exposes a
center portion of the pixel electrode 440. In addition, the pixel
defining layer 430 may increase distances between edges of the
pixel electrode and the opposite electrode 460, above the pixel
electrode 440, thereby preventing (or reducing) an arc and/or the
like from occurring at the edges of the pixel electrode 440. The
pixel defining layer 430 may be formed of an organic insulating
material such as polyimide, polyamide, an acryl resin,
benzocyclobutene, hexamethyldisiloxane (HMDSO), a phenol resin
and/or the like in a method such as a spin coating method, without
limitation.
[0148] An intermediate layer 450 of an organic light-emitting diode
OLED may include an organic emission layer. The organic emission
layer may include an organic material that includes a fluorescent
and/or phosphorescent material emitting red, green, blue, and/or
white light. The organic emission layer may include a low molecular
weight material or a high molecular weight material. A functional
layer such as a hole transport layer (HTL), a hole injection layer
(HIL), an electron transport layer (ETL), an electron injection
layer (HIL), and/or the like may be selectively further arranged
under and above the organic emission layer. The intermediate layer
450 may be arranged in correspondence (to correspond) to each of
the plurality of pixel electrodes 440. However, the intermediate
layer 450 is not limited thereto. The intermediate layer 450 may be
variously suitably modified, for example, to include a layer that
is integral over the plurality of pixel electrodes 440.
[0149] The opposite electrode 460 may be a transmissive electrode
or a reflective electrode. In some embodiments, the opposite
electrode 460 may be a transparent or a semi-transparent electrode
and may include a metal thin-film that has a small work function,
the metal thin-film including Li, Ca, LiF/Ca, LiF/AI, Al, Ag, Mg,
and/or a combination thereof. In some embodiments, a transparent
conductive oxide (TCO) film such as ITO, IZO, ZnO, and/or
In.sub.2O.sub.3 may be further arranged on the metal thin-film. The
opposite electrode 460 may be arranged over the display area DA and
the non-display area NDA, and may be arranged on the intermediate
layer 450 and the pixel defining layer 430. The opposite electrode
460 may be integrally formed over the plurality of emission
elements OLED.
[0150] The thin-film encapsulation layer 470, which is a sealing
member for sealing the emission elements OLED, may include at least
one inorganic encapsulation layer and at least one organic
encapsulation layer. The at least one inorganic encapsulation layer
may include at least one inorganic insulating material selected
from among aluminum oxide, titanium oxide, tantalum oxide, hafnium
oxide, zinc oxide, silicon oxide, silicon nitride, and silicon
oxynitride. The organic encapsulation layer may include a
polymer-based material. The polymer-based material may include
polyethylene terephthalate, polyethylene naphthalate,
polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene,
polyarylate, hexamethyldisiloxane, an acryl-based resin (for
example, polymethylmethacrylate, polyacrylic acid, and/or the
like), and/or any combination thereof.
[0151] The color panel 100 may have a plurality of pixel areas
arranged on the display panel 400 and respectively overlapping the
plurality of emission elements OLED. For example, in the display
apparatus 1000, light emitted from each pixel of the display panel
400 may be incident on the color panel 100, and a wavelength band
of the incident light may be converted in the color panel 100, or
only a particular wavelength band of the incident light may be
transmitted, or the incident light may be scattered and output
toward a pixel area at an upper portion of the color panel 100.
Light incident through the display panel 400 according to an
embodiment may correspond to blue light.
[0152] The color panel 100 in FIG. 4 may be identical to (or
substantially the same as) any one of the structures described
above with reference to FIGS. 2A through 3D.
[0153] According to an embodiment, the color panel 100 may include
the color conversion layer 140 that is interposed between the color
filter layer 120 (in which the color filters 122, 124, and 126 are
arranged) and the display panel 400, the color conversion layer 140
including the first color conversion element (for example, the
first element 142) that converts the light incident on the color
panel 100 into light of a particular wavelength band and outputs
the converted light, and the second color conversion element (for
example, the second element 144) separated from the first color
conversion element.
[0154] The color panel 100 may include the element (for example,
the third element 146) that is interposed between the color filter
layer 120 and the display panel 400 and integrally covering a
portion of the display area DA and a portion of the non-display
area NDA. The element may cover a pixel area PA located at the end
portion of the display area DA and extend to a portion of the
non-display area NDA. The element (for example, the third element
146) may include the same material (e.g., may be the same in
material) as the first color conversion element (for example, the
first element 142) or the second color conversion element (for
example, the second element 144) located in the display area DA, or
may include the same material (e.g., may be the same in material)
as the light-transmitting element that is located in the display
area DA and that transmits the incident light without converting
the wavelength band.
[0155] FIG. 5 is an equivalent circuit diagram of the pixel circuit
PC included in the display apparatus 1000 according to an
embodiment.
[0156] The pixel circuit PC may include a driving thin-film
transistor T1, a switching thin-film transistor T2, and a storage
capacitor Cst. The switching thin-film transistor T2 is connected
to a scanning line SL and a data line DL and transmits a data
signal Dm, which is input through the data line DL, to the driving
thin-film transistor T1, in response to a scanning signal Sn input
through the scanning line SL.
[0157] The storage capacitor Cst is connected to the switching
thin-film transistor T2 and a driving voltage line PL, and stores a
voltage corresponding to a difference between a voltage received
from the switching thin-film transistor T2 and a first power
voltage (ELVDD or the driving voltage) provided to the driving
voltage line PL.
[0158] The driving thin-film transistor T1 may be connected to the
driving voltage line PL and the storage capacitor Cst, and may
control a driving current flowing from the driving voltage line PL
to the organic light-emitting diode OLED in correspondence to a
value of the voltage stored in the storage capacitor Cst. The
organic light-emitting diode OLED may emit light having a certain
luminance according to the driving current.
[0159] FIG. 5 shows a case in which the pixel circuit PC includes
two thin-film transistors and one storage capacitor, but the
present disclosure is not limited thereto. The pixel circuit PC may
include seven thin-film transistors and one storage capacitor, for
example.
[0160] FIGS. 6A and 6B are cross-sectional views of the display
apparatus 1000 according to one or more embodiments of the present
disclosure. FIGS. 6A and 6B may be cross-sectional views of the
display apparatus 1000 when the display apparatus 1000 of FIG. 1A
is cut along line I-I'.
[0161] FIG. 6A is a cross-sectional view of the display apparatus
1000 including the color panel 100 shown in FIG. 2A, and FIG. 6B is
a cross-sectional view of the display apparatus 1000 including the
color panel 100 shown in FIG. 2B. Hereinafter, refer to FIGS. 2A
and 2B for descriptions of repeated elements.
[0162] As shown in FIGS. 6A and 6B, the display panel 400 may
include the plurality of emission elements OLED, and the plurality
of emission elements OLED may be arranged to overlap the plurality
of pixel areas of the color panel 100, respectively.
[0163] The display apparatus 1000 including the above-stated
structure may be a television 1A as shown in FIG. 7A, a laptop
computer and/or a foldable tablet PC 1B as shown in FIG. 7B, and/or
a portable display 1C (such as a mobile phone) as shown in FIG. 7C.
In some embodiments, the display apparatus may be applied to a
display portion provided in an artificial intelligence speaker. A
structure according to embodiments of the present disclosure is not
limited to a particular electronic device as long as the electronic
device is capable of providing a certain image.
[0164] According to embodiments of the present disclosure, in the
display apparatus, oxidization and/or deterioration of the color
conversion elements arranged in the display area may be minimized
(or reduced), and thus, a color panel having improved display
characteristic and/or reliability, and a display apparatus
including the color panel, may be provided. The scope of the
present disclosure is not limited by the effects described
above.
[0165] As used herein, expressions such as "at least one of", "one
of", and "selected from", when preceding a list of elements, modify
the entire list of elements and do not modify the individual
elements of the list.
[0166] Further, the use of "may" when describing embodiments of the
present disclosure refers to "one or more embodiments of the
present disclosure". Spatially relative terms, such as "beneath,"
"below," "lower," "above," "upper," "bottom," "top" and the like,
may be used herein for ease of description to describe one element
or feature's relationship to another element(s) or feature(s) as
illustrated in the figures. It will be understood that the
spatially relative terms are intended to encompass different
orientations of the device in use or operation in addition to the
orientation depicted in the figures. For example, if the device in
the figures is turned over, elements described as "below" or
"beneath" other elements or features would then be oriented "above"
or "over" the other elements or features. Thus, the term "below"
may encompass both an orientation of above and below. The device
may be otherwise oriented (rotated 90 degrees or at other
orientations), and the spatially relative descriptors used herein
should be interpreted accordingly.
[0167] As used herein, the terms "substantially", "about", and
similar terms are used as terms of approximation and not as terms
of degree, and are intended to account for the inherent deviations
in measured or calculated values that would be recognized by those
of ordinary skill in the art.
[0168] Any numerical range recited herein is intended to include
all sub-ranges of the same numerical precision subsumed within the
recited range. For example, a range of "1.0 to 10.0" is intended to
include all subranges between (and including) the recited minimum
value of 1.0 and the recited maximum value of 10.0, that is, having
a minimum value equal to or greater than 1.0 and a maximum value
equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any
maximum numerical limitation recited herein is intended to include
all lower numerical limitations subsumed therein and any minimum
numerical limitation recited in this specification is intended to
include all higher numerical limitations subsumed therein.
Accordingly, Applicant reserves the right to amend this
specification, including the claims, to expressly recite any
sub-range subsumed within the ranges expressly recited herein.
[0169] It should be understood that embodiments described herein
should be considered in a descriptive sense only and not for
purposes of limitation. Descriptions of features or aspects within
each embodiment should typically be considered as available for
other similar features or aspects in other embodiments. While one
or more embodiments have been described with reference to the
figures, it will be understood by those of ordinary skill in the
art that various changes in form and details may be made therein
without departing from the spirit and scope of the present
disclosure as defined by the following claims and their
equivalents.
* * * * *