U.S. patent application number 16/878964 was filed with the patent office on 2020-09-03 for display device.
The applicant listed for this patent is InnoLux Corporation. Invention is credited to Chih-Chang CHEN, Li-Wei MAO, Ming-Chia SHIH, Chung-Kuang WEI.
Application Number | 20200278580 16/878964 |
Document ID | / |
Family ID | 1000004843221 |
Filed Date | 2020-09-03 |
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United States Patent
Application |
20200278580 |
Kind Code |
A1 |
MAO; Li-Wei ; et
al. |
September 3, 2020 |
DISPLAY DEVICE
Abstract
A display device is provided, which includes a display unit and
a backlight module. The backlight module is disposed corresponding
to the display unit. The backlight module includes a circuit board,
a plurality of light sources, a diffuser plate and an optical film.
The light sources are disposed on the circuit board, the diffuser
plate is disposed between the light sources and the display unit,
and the optical film is disposed between the diffuser plate and the
display unit. The optical film includes a micro-structure, and the
micro-structure faces the light sources.
Inventors: |
MAO; Li-Wei; (Miao-Li
County, TW) ; SHIH; Ming-Chia; (Miao-Li County,
TW) ; CHEN; Chih-Chang; (Miao-Li County, TW) ;
WEI; Chung-Kuang; (Miao-Li County, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
InnoLux Corporation |
Miao-Li County |
|
TW |
|
|
Family ID: |
1000004843221 |
Appl. No.: |
16/878964 |
Filed: |
May 20, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
15707388 |
Sep 18, 2017 |
10690960 |
|
|
16878964 |
|
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|
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62416679 |
Nov 2, 2016 |
|
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62408871 |
Oct 17, 2016 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02F 1/133611 20130101;
G02F 1/133504 20130101; G02F 2201/56 20130101; G02F 1/133602
20130101 |
International
Class: |
G02F 1/13357 20060101
G02F001/13357; G02F 1/1335 20060101 G02F001/1335 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 5, 2017 |
CN |
201710541920.8 |
Claims
1. A display device, comprising: a display unit; and a backlight
module, disposed corresponding to the display unit, the backlight
module comprising: a plurality of light emitting units, wherein at
least one of the light emitting units has a first circuit block and
a first light source group, the first light source group comprises
a plurality of first light sources, and at least a portion of the
first light sources is disposed corresponding to the first circuit
block; and a plurality of edge units, wherein at least one of the
edge units has a second circuit block and an edge portion, the edge
portion is adjacent to the second circuit block, and the second
circuit block is disposed between the edge portion and the first
circuit block; wherein the shape of the second circuit block is
different from the shape of the first circuit block.
2. The display device as claimed in claim 1, wherein the backlight
module further comprises a plurality of blocking walls, disposed
between the light emitting units.
3. The display device as claimed in claim 1, wherein one of the
edge units further has a second light source group, the second
light source group comprises a plurality of second light sources,
and a number of the first light sources is equal to a number of the
second light sources.
4. The display device as claimed in claim 3, wherein a spacing
between two adjacent light sources is defined as a second spacing,
and the first spacing is different from the second spacing.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional application of U.S.
application Ser. No. 15/707,388, filed Sep. 18, 2017, which claims
benefit of U.S. Provisional Application No. 62/408,871 filed Oct.
17, 2016, U.S. Provisional Application No. 62/416,679 filed Nov. 2,
2016, and China Patent Application No. 201710541920.8, filed Jul.
5, 2017, the entirety of which is incorporated by reference
herein.
BACKGROUND OF THE DISCLOSURE
Field of the Disclosure
[0002] The present disclosure relates to a display device, and more
particularly to a display device using the structural design of the
backlight module to increase viewing angle or brightness.
Description of the Related Art
[0003] An electronic display device is an optoelectronic device
capable of transforming electronic signals into a visible image, so
as to allow a user to view the information that has been
transformed from electronic signals. Recently, electronic display
devices such as liquid-crystal displays (LCD) and organic electro
luminescence displays have become popular.
[0004] In recent years, curved display devices as well as those
with non-rectangular shapes have found application in various
fields. For example, the dashboard of a car can be designed with a
non-rectangular shaped structure so as to enhance its aesthetic
appearance.
[0005] However, in contrast to conventional flat panel display
devices, a curved or non-rectangular display device may have
problems such as a small viewing angle, insufficient brightness, or
non-uniform brightness.
[0006] Consequently, how to design a display device with large
viewing angle, sufficient brightness or uniform brightness is an
important subject.
BRIEF SUMMARY OF THE DISCLOSURE
[0007] As a result, the disclosure provides a display device to
solve the aforementioned problem.
[0008] In one embodiment, the disclosure provides a display device
which includes a display unit and a backlight module. The backlight
module is disposed corresponding to the display unit. The backlight
module includes a circuit board, a plurality of light sources, a
diffuser plate and an optical film. The plurality of light sources
is disposed on the circuit board. The diffuser plate is disposed
between the light sources and the display unit, and the optical
film is disposed between the diffuser plate and the display unit.
The optical film includes a micro-structure, and the
micro-structure faces the light sources.
[0009] In some embodiments, the disclosure further provides a
display device, which includes a display unit and a backlight
module. The backlight module is disposed corresponding to the
display unit. The backlight module includes a circuit board, a
plurality of light sources, a first diffuser plate and a second
diffuser plate. The light sources are disposed on the circuit
board, the first diffuser plate is disposed between the light
sources and the display unit, and the second diffuser plate is
disposed between the first diffuser plate and the display unit. The
circuit board includes at least one radius of curvature, and the
radius of curvature ranges from 10 mm to 10000 mm.
[0010] In some embodiments, the disclosure further provides a
display device, which includes a display unit and a backlight
module. The backlight module is disposed corresponding to the
display unit. The backlight module includes a plurality of light
emitting units and a plurality of edge units. At least one of the
light emitting units has a first circuit block and a first light
source group, the first light source group includes a plurality of
first light sources, and at least a portion of the first light
sources is disposed corresponding to the first circuit block. At
least one of the edge units has a second circuit block and an edge
portion, the edge portion is adjacent to the second circuit block,
and the second circuit block is disposed between the edge portion
and the first circuit block. The shape of the second circuit block
is different from the shape of the first circuit block.
[0011] In the embodiments of the disclosure, the display device can
be a flat panel display, a curved display device or a display
device with an irregularly shaped structure (such as a
non-rectangular shaped structure). Based on the arrangement of
different optical films or the arrangement of the light sources
disposed on the circuit board with the irregularly shaped
structure, the viewing angle of the display device can be
increased, the brightness of the display device can be stronger, or
the phenomenon of non-uniform brightness can be prevented from
occurring.
[0012] Additional features and advantages of the disclosure will be
set forth in the description which follows, and, in part, will be
obvious from the description, or can be learned by practice of the
principles disclosed herein. The features and advantages of the
disclosure can be realized and obtained by means of the instruments
and combinations particularly pointed out in the appended claims.
These and other features of the disclosure will become more fully
apparent from the following description and appended claims, or can
be learned by the practice of the principles set forth herein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a diagram of a display device according to the
first embodiment of the disclosure.
[0014] FIG. 2 is a diagram of a display device according to the
second embodiment of the disclosure.
[0015] FIG. 3 is a diagram of a display device according to the
third embodiment of the disclosure.
[0016] FIG. 4 is a diagram of a display device according to the
fourth embodiment of the disclosure.
[0017] FIG. 5 is a diagram of a display device according to the
fifth embodiment of the disclosure.
[0018] FIG. 6 is a diagram of a display device according to the
sixth embodiment of the disclosure.
[0019] FIG. 7A is a diagram of the circuit board viewed along the Y
axis according to any embodiment of the disclosure.
[0020] FIG. 7B is a partial diagram of the circuit board according
to any embodiment of the disclosure.
[0021] FIG. 8 is a diagram of a backlight module according to an
embodiment of the disclosure.
[0022] FIG. 9 is a diagram illustrating one edge unit and a first
circuit block adjacent to the edge unit.
[0023] FIG. 10 is a diagram illustrating another edge unit and a
first circuit block adjacent to the edge unit.
[0024] FIG. 11 is a diagram illustrating another edge unit and a
first circuit block adjacent to the edge unit.
[0025] FIG. 12 is a diagram illustrating two adjacent edge
units.
[0026] FIG. 13 is a sectional view of a display device which is
perpendicular to the XY plane according to the seventh embodiment
of the disclosure.
[0027] FIG. 14 is a diagram illustrating the relationship between
the brightness of the display device and the angle of view
according to an embodiment of the disclosure.
[0028] FIG. 15 is a partial structural diagram of a backlight
module according to an embodiment of the disclosure.
[0029] FIG. 16 is a diagram of a display device according to the
eighth embodiment of the disclosure.
[0030] FIG. 17 is a diagram of a display device according to the
ninth embodiment of the disclosure.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS
[0031] In the following detailed description, for the purposes of
explanation, numerous specific details and embodiments are set
forth in order to provide a thorough understanding of the present
disclosure. The specific elements and configurations described in
the following detailed description are set forth in order to
clearly describe the present disclosure. It will be apparent,
however, that the exemplary embodiments set forth herein are used
merely for the purpose of illustration, and the inventive concept
may be embodied in various forms without being limited to those
exemplary embodiments. In addition, the drawings of different
embodiments may use like and/or corresponding numerals to denote
like and/or corresponding elements in order to clearly describe the
present disclosure. However, the use of like and/or corresponding
numerals in the drawings of different embodiments does not suggest
any correlation between different embodiments. The directional
terms, such as "up", "down", "left", "right", "front" or "rear",
are reference directions for accompanying drawings. Therefore,
using the directional terms is for description instead of limiting
the disclosure.
[0032] In this specification, relative expressions are used. For
example, "lower", "bottom", "higher" or "top" are used to describe
the position of one element relative to another. It should be
appreciated that if a device is flipped upside down, an element at
a "lower" side will become an element at a "higher" side.
[0033] The terms "about" and "substantially" typically mean +/-20%
of the stated value, more typically +/-10% of the stated value and
even more typically +/-5% of the stated value. The stated value of
the present disclosure is an approximate value. When there is no
specific description, the stated value includes the meaning of
"about" or "substantially".
The First Embodiment
[0034] Please refer to FIG. 1, which is a diagram of a display
device 100 according to the first embodiment of the disclosure. In
this embodiment, the display device 100 can be a direct-lit curved
display device. The display device 100 includes a display unit 102
and a backlight module 104. The display unit 102 can include two
substrates (such as a rigid substrate, a glass substrate, a
flexible substrate, substrates made of other materials, and a
combination thereof), a display layer (such as a liquid-crystal
layer or other display layers) and a driving circuit layer (not
shown in the figures), and so on. In other embodiments, the display
unit 102 can selectively include a color filter disposed between
two substrates, but it is not limited thereto. The display layer is
disposed between the two substrates, and the driving circuit layer
can include a plurality of thin-film transistor (TFT). The color
filter can, for example, include a red filter portion, a green
filter portion, or a blue filter portion. In other embodiments, the
color filter can also be formed of other materials with
light-conversion properties, such as a quantum dot material, a
fluorescent material, a phosphor material, or a combination
thereof, but it is not limited thereto.
[0035] The backlight module 104 can be disposed corresponding to
the display unit 102. In particular, the backlight module 104 can
be disposed below the display unit 102. In this embodiment, the
backlight module 104 can include a circuit board 106, a plurality
of light sources 108, a first diffuser plate 110 and a second
diffuser plate 112. The light sources 108 can be disposed on the
circuit board 106. In one embodiment of the disclosure, the light
sources 108 can include a quantum dot (QD) material, a fluorescent
material, a phosphor material, a light-emitting diode (LED), a
micro light-emitting diode (micro LED), other light sources or a
combination thereof, but it is not limited thereto. The first
diffuser plate 110 can be disposed between the light sources 108
and the display unit 102, and the second diffuser plate 112 can be
disposed between the first diffuser plate 110 and the display unit
102. The arrangement of the first diffuser plate 110 and the second
diffuser plate 112 can increase the viewing angle of the display
device 100, can increase the brightness of the display device 100,
or can prevent the phenomenon of non-uniform brightness from
occurring.
[0036] In this embodiment, the display device 100 is a curved
display device. Although the circuit board 106, the first diffuser
plate 110, the second diffuser plate 112 and the display unit 102
are illustrated in FIG. 1 as a planar structure, those structures
are actually curved because only a portion of the display device
100 is illustrated in FIG. 1. The circuit board 106 includes at
least one radius of curvature, and the radius of curvature ranges
from 10 mm to 10000 mm. In other embodiments, the at least one
radius of curvature ranges from 50 mm to 7000 mm.
[0037] In addition, a distance between two adjacent light sources
108 is defined as a first distance d1, and a distance between the
first diffuser plate 110 and the circuit board 106 is defined as a
second distance d2. Specifically, on a cross-section perpendicular
to an upper surface of the circuit board 106, the first distance d1
can be the distance between the centers of two adjacent light
sources 108 (as illustrated in FIG. 1), or the distance between the
same sides of the two adjacent light sources 108 (such as two left
sides of the two light sources 108 or two right sides of the two
light sources 108). The second distance d2 can be the distance
between a lower surface of the first diffuser plate 110 and the
upper surface of the circuit board 106 (as illustrated in FIG. 1).
In this embodiment, the ratio of the first distance d1 to the
second distance d2 is configured to be 15:10. In another
embodiment, the backlight module 104 can further include a dot
printing layer (not shown in the figures) disposed on the lower
surface of the first diffuser plate 110. At this time, the second
distance d2 can be configured to be the distance between the lower
surface of the first diffuser plate 110 having the dot printing
layer and the upper surface of the circuit board 106, and the ratio
of the first distance d1 to the second distance d2 can be designed
to be 25:10.
[0038] In addition, it should be noted that no lens structure can
be disposed between the first diffuser plate 110 and the circuit
board 106 in the backlight module 104. For example, a conventional
display device includes a second lens disposed on the surface of
the light-emitting diode. However, in the curved display device,
the second lens is usually not able to be stably fixed on the
circuit board, and easily causes the problem of non-uniform
brightness. Therefore, in this embodiment, at least one light
source 108 can have no second lens. For example, no second lens is
disposed on all of the light sources 108, or only a part of the
light sources 108 have the second lenses, but it is not limited
thereto.
The Second Embodiment
[0039] Please refer to FIG. 2, which is a diagram of a display
device 100A according to the second embodiment of the disclosure.
In contrast to the first embodiment, a backlight module 104A of the
display device 100A further includes a first optical film 114 and a
second optical film 116. The first optical film 114 can be disposed
between the second diffuser plate 112 and the display unit 102, and
the second optical film 116 can be disposed between the first
optical film 114 and the display unit 102. The first optical film
114 can be a diffuser film, and the second optical film 116 can be
a diffuser film or a dual brightness enhancement film. The
brightness of the display device 100A is more uniform due to the
configuration of the first optical film 114 and the second optical
film 116.
The Third Embodiment
[0040] Please refer to FIG. 3, which is a diagram of a display
device 100B according to the third embodiment of the disclosure. In
contrast to the second embodiment, a backlight module 104B of the
display device 100B further includes a first brightness enhancement
film 118 and a second brightness enhancement film 120. The first
brightness enhancement film 118 can be disposed between the first
optical film 114 and the second optical film 116, and the second
brightness enhancement film 120 can be disposed between the first
brightness enhancement film 118 and the second optical film 116.
The brightness of the display device 100B can be further increased
due to the configuration of the first brightness enhancement film
118 and the second brightness enhancement film 120.
The Fourth Embodiment
[0041] Please refer to FIG. 4, which is a diagram of a display
device 100C according to the fourth embodiment of the disclosure.
In contrast to the third embodiment, a backlight module 104C of the
display device 100C further includes a third brightness enhancement
film 122. The third brightness enhancement film 122 is disposed
between the first diffuser plate 110 and the second diffuser plate
112. In this embodiment, the brightness of the display device 100C
can be increased due to the configuration of the first brightness
enhancement film 118 and the second brightness enhancement film
120, and the brightness of the display device 100C is more uniform
due to the configuration of the third brightness enhancement film
122.
The Fifth Embodiment
[0042] Please refer to FIG. 5, which is a diagram of a display
device 100D according to the fifth embodiment of the disclosure. In
contrast to the fourth embodiment, a backlight module 104D of the
display device 100D further includes a fourth brightness
enhancement film 124. The fourth brightness enhancement film 124 is
disposed between the third brightness enhancement film 122 and the
second diffuser plate 112. In this embodiment, the brightness of
the display device 100D can be increased due to the configuration
of the first brightness enhancement film 118 and the second
brightness enhancement film 120, and the brightness of the display
device 100D is more uniform due to the configuration of the third
brightness enhancement film 122 and the fourth brightness
enhancement film 124.
The Sixth Embodiment
[0043] Please refer to FIG. 6, which is a diagram of a display
device 100E according to the sixth embodiment of the disclosure. In
this embodiment, at least one of the first diffuser plate 110 and
the second diffuser plate 112 can be replaced by a micro-lens
diffuser plate. In this embodiment, a backlight module 104E of the
display device 100E includes the circuit board 106, the light
sources 108, the first optical film 114, the first brightness
enhancement film 118, the second brightness enhancement film 120, a
first micro-lens diffuser plate 126 and a second micro-lens
diffuser plate 128. The first brightness enhancement film 118 is
disposed between the first micro-lens diffuser plate 126 and the
second micro-lens diffuser plate 128, the second brightness
enhancement film 120 is disposed between the first brightness
enhancement film 118 and the second micro-lens diffuser plate 128,
and the first optical film 114 is disposed between the second
micro-lens diffuser plate 128 and the display unit 102. The
brightness and image of the display device 100E can be more uniform
due to the configuration of the first micro-lens diffuser plate 126
and the second micro-lens diffuser plate 128.
[0044] It should be noted that the first diffuser plate 110 and the
second diffuser plate 112 in the first to fifth embodiments can
also respectively be replaced by the first micro-lens diffuser
plate 126 and the second micro-lens diffuser plate 128.
Furthermore, one of the first diffuser plate 110 and the second
diffuser plate 112 can be replaced by the micro-lens diffuser
plate. The structural configuration of the backlight module can be
modified according to the design requirements.
[0045] Please refer to FIG. 7A and FIG. 7B. FIG. 7A is a diagram of
the circuit board viewed along the Y axis according to any
embodiment of the disclosure, and FIG. 7B is a partial diagram of
the circuit board according to any embodiment of the disclosure. As
shown in FIG. 7A, when viewed along the Y axis, a circuit board
1060 can be an irregularly shaped structure and can have at least
one radius of curvature, which ranges from 10 mm to 10000 mm or
ranges from 50 mm to 7000 mm. For example, the circuit board 1060
includes regions A to G, and the region A, the region B, the region
C, the region E and the region F can have different radii of
curvature. The region D and the region G can be substantially a
plane, and there can be an inflection point in the region B and the
region C, or in the region E and the region F, but it is not
limited thereto. In other embodiments, the circuit board 1060 can
have other shapes and other radii of curvature according to the
design requirements. FIG. 7B is a partial enlarged diagram of the
region E of the circuit board 1060. The light source 108 can have a
rectangular structure, the circuit board 1060 can have a curved
surface S, and the light source 108 can be disposed on the curved
surface S. The curved surface S can be a surface close to the
display unit 102, but it is not limited thereto. Specifically, the
rectangular structure of the light source 108 can define a long
side direction A1, and the curved surface S can define an extending
line Rx. The long side direction A1 of the rectangular structure is
substantially perpendicular to the extending line Rx of the curved
surface S. That is, the included angle between the long side
direction A1 and the extending line Rx is in a range from about 85
degrees to 95 degrees. However, the arrangement of the light
sources 108 on the curved surface S is not limited to this
embodiment. For example, the long side direction A1 of the light
source 108 can be parallel to the extending line Rx of the curved
surface S. In other embodiments, when the light source 108 is not a
rectangular structure, the long side direction A1 may be a
direction along a longitudinal axis (such as Y axis in FIG. 7B) of
the light source 108. In this embodiment, "extending line Rx" could
be a virtual line along the curved surface S (as shown in FIG. 7B)
perpendicular to a bending axis (such as along Y axis in FIG. 7B)
of the circuit board 1060 from plan view (such as viewing along Z
axis in FIG. 7B). In one embodiment, "perpendicular to the
extending line" or "parallel to the extending line" may be
perpendicular to a projection of the extending line on the circuit
board 1060 onto the XY plane in plan view (such as viewing along Z
axis in FIG. 7B) or parallel to a projection of the extending line
on the circuit board 1060 onto the XY plane in plan view (such as
viewing along Z axis in FIG. 7B).
[0046] Please refer to FIG. 8, which is a diagram of a backlight
module 104F according to an embodiment of the disclosure. The
backlight module 104F includes a circuit board 106', and the
circuit board 106' can be defined by and composed of a plurality of
light emitting units and a plurality of edge units. The light
emitting units are arranged in a matrix, and at least one of the
light emitting units can include a first circuit block 1061. In one
embodiment, each of the light emitting units can include a first
circuit block 1061. In one embodiment, the circuit board 106' is
composed of ten first circuit blocks 1061 with the same shape and
four edge units 1062, 1063, 1064 and 1065. The first circuit blocks
1061 can have the same size and the same shape, and are, for
example, arranged in a matrix, but it is not limited to this
disclosure. In other embodiments, the first circuit blocks 1061 can
have different sizes and different shaped, and can be arranged
according to the design requirements. At least one of the edge
units can has a second circuit block and an edge portion. In one
embodiment, each of the edge units can has a second circuit block
and an edge portion. For example, the edge unit 1062 can have a
second circuit block 1062A and an edge portion 1062B, the edge unit
1063 can have a second circuit block 1063A and an edge portion
1063B, the edge unit 1064 can have a second circuit block 1064A and
an edge portion 1064B, and the edge unit 1065 can have a second
circuit block 1065A and an edge portion 1065B. The edge portions
1062B to 1065B can be adjacent to the second circuit blocks 1062A
to 1065A, and the second circuit blocks 1062A to 1065A can be
respectively disposed between the edge portions and the first
circuit blocks 1061. In an embodiment, The shapes of the second
circuit blocks 1062A to 1065A are different from the shapes of the
first circuit blocks 1061. In this embodiment, the first circuit
blocks 1061 and the second circuit blocks 1062A to 1065A can
substantially correspond to a display area of the display unit 102,
and the edge portions 1062B to 1065B can substantially correspond
to a peripheral area of the display unit 102, and the peripheral
area surrounds the display area, but it is not limited thereto.
[0047] Furthermore, the light emitting units can further include a
first light source group which includes a plurality of first light
sources 1081, and at least one portion of the first light sources
1081 are disposed corresponding to the first circuit block 1061. In
this embodiment, the first light source group can include nine
first light sources 1081 disposed on the corresponding first
circuit block 1061. A spacing between two adjacent first light
sources 1081 is defined as a first spacing D1, and the first
spacing D1 is a constant value. The first spacing D1 can be the
distance between the centers of two adjacent first light sources
1081 (as illustrated in FIG. 8), or the distance between the same
sides of the two adjacent first light sources 1081 (such as two
left sides of the two first light sources 1081 or two right sides
of the two first light sources 1081). In other embodiments, the
first light source group can only include one first light source
1081, but the number of the first light sources 1081 is not limited
to those embodiments. In one embodiment, the plurality of first
light sources 1081 of the first light source group can be connected
to each other in series to output through the same channel and can
be electrically connected to a converter. Therefore, the plurality
of first light sources 1081 of the first light source group can be
driven together. For example, the first light sources 1081 becomes
bright or dark at the same time, but it is not limited thereto.
Furthermore, the backlight module 104F can include a plurality of
blocking walls protruding along the Z axis (not shown in the
figures), and the blocking walls are disposed between the light
emitting units. For example, the blocking wall is disposed on the
boundary between two adjacent first circuit blocks 1061. The
blocking wall is configured to concentrate the light emitted from
the first light sources 1081 of the corresponding first circuit
block 1061 within the area of the first circuit block 1061. In
addition, the blocking wall can also be disposed between the first
circuit block 1061 and the second circuit block.
[0048] Please refer to FIG. 9, which is a diagram illustrating one
of the edge units 1062 and the adjacent first circuit block 1061
shown in FIG. 8. As shown in FIG. 9, because the area of the second
circuit block 1062A of the edge unit 1062 is less than 50% of the
area of the adjacent first circuit block 1061, there can be no
additional light source disposed on the second circuit block 1062A,
and the nine first light sources 1081 corresponding to the first
circuit block 1061 can be arranged on the first circuit block 1061,
the second circuit block 1062A and the edge portion 1062B, but the
arrangement of the first light sources 1081 is not limited to the
embodiment. In other embodiments, although the ratio of the area of
the second circuit block 1062A to the area of the adjacent first
circuit block 1061 varies, the nine first light sources 1081
originally corresponding to the first circuit block 1061 can still
be arranged on the first circuit block 1061, the second circuit
block 1062A and the edge portion 1062B. In one embodiment, an
exemplary arrangement of the first light sources 1081 is shown in
FIG. 9. Six first light sources 1081 can be disposed on the first
circuit block 1061, and three first light sources 1081 can be
disposed on the second circuit block 1062A and the edge portion
1062B. The first circuit block 1061, the second circuit block 1062A
and the edge portion 1062B can be arranged along the Y axis. A
spacing between two adjacent first light sources 1081 along the X
axis is defined as a first spacing D1 (the first spacing D1 is, for
example, the distance between the centers of two adjacent first
light sources 1081 along the X axis). A spacing between two
adjacent first light sources 1081 along the Y axis is defined as a
third spacing D2 (the third spacing D2 is, for example, the
distance between the centers of two adjacent first light sources
1081 along the Y axis), and the third spacing D2 can be greater
than the first spacing D1. In this embodiment, because the nine
first light sources 1081 of the first light source group are
disposed on the first circuit block 1061, the second circuit block
1062A and the edge portion 1062B, the blocking wall between the
first circuit block 1061 and the second circuit block 1062A can be
removed.
[0049] Please refer to FIG. 10, which is a diagram illustrating the
edge unit 1063 and the first circuit block 1061 adjacent to the
edge unit 1063 in FIG. 8. As shown in FIG. 10, one of the edge
units further include a second light source group which includes a
plurality of second light sources 1082. The number of the second
light sources 1082 can be equal to the number of the first light
sources 1081, but the number of the first light sources 1081 and
the number of the second light sources 1082 are not limited to this
disclosure. In other embodiment, the number of the second light
sources 1082 can be less than the number of the first light sources
1081. In this embodiment, the second light source group includes
nine second light sources 1082, and the area of the second circuit
block 1063A is greater than 50% of the area of the first circuit
block 1061. In this situation, the first light sources 1081 can,
for example, be disposed on the first circuit block 1061 with a
fixed spacing, and two adjacent first light sources 1081 has the
first spacing D1. Furthermore, nine second light sources 1082 are
disposed within the second circuit block 1063A, and two adjacent
second light sources 1082 can have a second spacing D3 (the second
spacing D3 is, for example, the distance between the centers of two
adjacent second light sources 1082 along the Y axis). A spacing
between two adjacent second light sources 1082 along the X axis is
defined as a first spacing D1 (the first spacing D1 is, for
example, the distance between the centers of two adjacent second
light sources 1082 along the X axis), and the first spacing D1 is
different from the second spacing D3. In one embodiment, the first
spacing D1 can be greater than the second spacing D3, but it is not
limited thereto. It should be noted that there is no light source
disposed on the edge portion 1063B. In this embodiment, the
blocking wall can be disposed between the first circuit block 1061
and the second circuit block 1063A.
[0050] Please refer to FIG. 11, which is a diagram illustrating the
edge unit 1063 and the first circuit block 1061 adjacent to the
edge unit 1063 in FIG. 8. The difference between FIG. 11 and FIG.
10 is that the second light sources 1082 are, for example, arranged
within the edge unit 1063 in a staggered manner, and the second
light sources 1082 can be disposed in the second circuit block
1063A and the edge portion 1063B at the same time. However, the
arrangement of the second light sources 1082 can be modified to
meet different design requirements. In this embodiment, the
blocking wall can be disposed between the first circuit block 1061
and the second circuit block 1063A.
[0051] In addition to the arrangement of the first light sources
1081 and the second light sources 1082, the first light sources
1081 and the second light sources 1082 can be arranged as shown in
FIG. 12. Please refer to FIG. 12, which is a diagram illustrating
the edge unit 1064 and the edge unit 1065 adjacent to the edge unit
1064 in FIG. 8. As shown in FIG. 12, the edge unit 1064 is adjacent
to the edge unit 1065. In this situation, the second light sources
1082 can, for example, be disposed in the edge unit 1064 and the
edge unit 1065 in a stepped manner. As shown in FIG. 12, three
second light sources 1082 can be disposed in the edge unit 1064,
and six second light sources 1082 can be disposed in the edge unit
1065. Specifically, the second light sources 1082 can be disposed
in the second circuit block 1064A, the edge portion 1064B, the
second circuit block 1065A and the edge portion 1065B, but the
arrangement is not limited to this embodiment. In one embodiment,
the second light sources 1082 can be selectively disposed in at
least one of the second circuit block 1064A, the edge portion
1064B, the second circuit block 1065A and the edge portion 1065B
according to the design requirements, but the arrangement is not
limited to this embodiment.
The Seventh Embodiment
[0052] Please refer to FIG. 13, which is a sectional view of a
display device 100G which is perpendicular to the XY plane
according to the seventh embodiment of the disclosure. As shown in
FIG. 13, the display device 100G can include the display unit 102
and a backlight module 104G. The backlight module 104G can be
disposed corresponding to the display unit 102, and the backlight
module 104G can include the circuit board 106, a plurality of light
sources 108, a diffuser plate 130 and an optical film 132. The
light sources 108 can be disposed on the circuit board 106, and the
diffuser plate 130 can be disposed between the light sources 108
and the display unit 102. The optical film 132 can be disposed
between the diffuser plate 130 and the display unit 102, and the
surface of the optical film 132 close to the diffuser plate 130 can
include a micro-structure 134, and the micro-structure 134 can face
the light sources 108. In one embodiment, the micro-structure 134
and the optical film 132 can be integrally formed in one piece, and
the micro-structure 134 is disposed on the surface of the optical
film 132 which is close to the diffuser plate 130, so as to face
the light sources 108. In other embodiments, a layer of material
can be coated on the surface of the optical film 132 close to the
diffuser plate 130, so as to form the micro-structure 134, but the
method of forming the micro-structure 134 is not limited to this
embodiment.
[0053] In this embodiment, cross-section of FIG. 13 can be a
cross-section which is perpendicular to the surface of the optical
film 132, or is a cross-section which is parallel to the Z axis.
The micro-structure 134 can include a plurality of arc-shaped
structures, such as micro-lens structures. The arc-shaped structure
can protrude from the surface of the optical film 132 and can face
the diffuser plate 130 or the light sources 108. The viewing angle
of the display device 100G along some directions can be increased,
or the display device 100G has sufficient brightness on a specific
angle of view because of the optical film 132 having the
micro-structure 134. For example, as shown in FIG. 14, which is a
diagram illustrating the relationship between the brightness of the
display device and the angle of view according to an embodiment of
the disclosure. A user is located on the upper side of the display
device 100G and looks at the display device 100G along the -Z axis
(FIG. 13), and the line of sight of the user is parallel to the XZ
plane. Therefore, the angle of view can be an angle defined by the
line of sight of the user and the Z axis on the XZ plane. As shown
in FIG. 14, when the angle of view of the user is 60 degrees, the
brightness can achieve 50% of the maximum brightness because of the
configuration of the optical film 132.
[0054] Please refer to FIG. 15, which is a partial structural
diagram of a backlight module 104H according to an embodiment of
the disclosure. In this embodiment, the optical film 132 can
include a micro-structure 136, and the micro-structure 136 can
include a plurality of prism structures. The prism structures can,
for example, be long strip triangular structures (as shown in FIG.
15), and the prism structures can protrude from the optical film
132 and face the light sources on the circuit board 106 (not shown
in the figures).
[0055] It should be noted that the optical film 132 can include a
rectangular structure. The rectangular structure can have a long
side direction A2 (such as the direction of the X axis in FIG. 15)
and a short side direction A3 (such as the direction of the Y axis
in FIG. 15), and a longitudinal axis direction Am (such as the
direction of the Y axis or an extending line of the prism
structures) can be perpendicular to the long side direction A2 of
the rectangular structure of the optical film 132, so as to
increase the viewing angle of the backlight module 104H. The user
is located on the upper side of the backlight module 104H and looks
at the backlight module 104H along the -Z axis, and the line of
sight of the user is parallel to the XZ plane. Therefore, the angle
of view can also be the angle defined by the line of sight of the
user and the Z axis on the XZ plane, and the viewing angle can be
defined as the maximum angle of view which allows the user clearly
watching the display device along the XZ plane. For example, as
shown in FIG. 14, when the angle of view of the user is 60 degrees,
the brightness can maintained above 50% of the maximum brightness.
In another embodiment, the longitudinal axis direction Am can also
be perpendicular to the short side direction A3 of the optical film
132, so as to increase the viewing angle of the backlight module
104H. In this embodiment, the line of sight of the user is parallel
to the YZ plane, and the angle of view can be the angle defined by
the line of sight of the user and the Z axis on the YZ plane. The
viewing angle can be defined as the maximum angle of view which
allows the user clearly watching the display device along the YZ
plane, but it is not limited to this embodiment. In other
embodiments, other micro-structure of the optical film or the
manner of disposing the micro-structure can be implemented
according to the design requirements.
The Eighth Embodiment
[0056] Please refer to FIG. 16, which is a diagram of a display
device 100I according to the eighth embodiment of the disclosure.
The structure of the display device 100I disclosed in this
embodiment is similar to the structure of the display device 100G
disclosed in the seventh embodiment. The difference between the
display device 100I and the display device 100G is that the display
device 100I of this embodiment can further include the first
brightness enhancement film 118 disposed between the diffuser plate
130 and the optical film 132. The brightness of the display device
100I can be increased because of the configuration of the first
brightness enhancement film 118. Furthermore, in one embodiment,
the display device 100I can also include another brightness
enhancement film (not shown in the figures) disposed between the
first brightness enhancement film 118 and the optical film 132, so
as to increase the brightness of the display device 100I.
The Ninth Embodiment
[0057] Please refer to FIG. 17, which is a diagram of a display
device 100J according to the ninth embodiment of the disclosure. In
contrast to the display device 100I in the eighth embodiment, the
display device 100J can further include a second brightness
enhancement film 120 and an optical film 138, and the optical film
138 can be a dual brightness enhancement film or a diffuser plate.
The second brightness enhancement film 120 can be disposed between
the first brightness enhancement film 118 and the optical film 132.
Based on the configuration of the first brightness enhancement film
118, the second brightness enhancement film 120 and the optical
film 138, the brightness of the display device 100J can be
increased or the effect of light-concentrating can be improved.
[0058] In conclusion, in the embodiments of the disclosure, the
display device includes the display unit and the backlight module.
The display device can be a flat panel display, a curved display
device or a display device with an irregularly shaped structure
(such as a non-rectangular shaped structure). Based on the
arrangement of different optical films or the arrangement of the
light sources disposed on the circuit board with the irregularly
shaped structure, the viewing angle of the display device can be
increased, the brightness of the display device can be stronger, or
the phenomenon of non-uniform brightness can be prevented from
occurring.
[0059] Although the embodiments and their advantages have been
described in detail, it should be understood that various changes,
substitutions, and alterations can be made herein without departing
from the spirit and scope of the embodiments as defined by the
appended claims. Moreover, the scope of the present application is
not intended to be limited to the particular embodiments of the
process, machine, manufacture, composition of matter, means,
methods, and steps described in the specification. As one of
ordinary skill in the art will readily appreciate from the
disclosure, processes, machines, manufacture, compositions of
matter, means, methods, or steps, presently existing or later to be
developed, that perform substantially the same function or achieve
substantially the same result as the corresponding embodiments
described herein may be utilized according to the disclosure.
Accordingly, the appended claims are intended to include within
their scope such processes, machines, manufacture, compositions of
matter, means, methods, or steps. In addition, each claim
constitutes a separate embodiment, and the combination of various
claims and embodiments are within the scope of the disclosure.
* * * * *