U.S. patent application number 16/548374 was filed with the patent office on 2019-12-12 for light-emitting diode display device.
The applicant listed for this patent is InnoLux Corporation. Invention is credited to Tsau-Hua HSIEH, Jui-Feng KO, Chun-Hsien LIN, Ming-Chang LIN, Tung-Kai LIU, Hui-Chieh WANG, Tzu-Min YAN.
Application Number | 20190378985 16/548374 |
Document ID | / |
Family ID | 61069529 |
Filed Date | 2019-12-12 |
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United States Patent
Application |
20190378985 |
Kind Code |
A1 |
LIN; Chun-Hsien ; et
al. |
December 12, 2019 |
LIGHT-EMITTING DIODE DISPLAY DEVICE
Abstract
A light-emitting diode display device is provided, including: a
substrate, including a plurality of grooves, wherein an electrical
contact is disposed in each of the grooves; and a plurality of
light-emitting diodes, configured to be installed in the grooves,
wherein each of the light-emitting diodes includes: a main body;
and a first contact and a second contact, disposed on the main
body, wherein the first contact and the second contact are
respectively electrically connected to the substrate through the
corresponding electrical contacts.
Inventors: |
LIN; Chun-Hsien; (Miao-Li
County, TW) ; LIN; Ming-Chang; (Miao-Li County,
TW) ; YAN; Tzu-Min; (Miao-Li County, TW) ;
HSIEH; Tsau-Hua; (Miao-Li County, TW) ; LIU;
Tung-Kai; (Miao-Li County, TW) ; KO; Jui-Feng;
(Miao-Li County, TW) ; WANG; Hui-Chieh; (Miao-Li
County, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
InnoLux Corporation |
Miao-Li County |
|
TW |
|
|
Family ID: |
61069529 |
Appl. No.: |
16/548374 |
Filed: |
August 22, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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15662522 |
Jul 28, 2017 |
10446752 |
|
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16548374 |
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62394225 |
Sep 14, 2016 |
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62371246 |
Aug 5, 2016 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01L 51/0012 20130101;
H01L 27/28 20130101; H01L 27/3211 20130101; H01L 51/0002 20130101;
H01L 21/48 20130101; H01L 51/0024 20130101; H01L 27/3276
20130101 |
International
Class: |
H01L 51/00 20060101
H01L051/00; H01L 27/28 20060101 H01L027/28; H01L 27/32 20060101
H01L027/32 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 17, 2017 |
CN |
201710249088.4 |
Claims
1. A light-emitting diode display device, comprising: a substrate,
including a plurality of grooves, wherein an electrical contact is
disposed in each of the grooves; and a plurality of light-emitting
diodes, configured to be installed in the grooves, wherein each of
the light-emitting diodes includes: a main body; and a first
contact and a second contact, disposed on the main body, wherein
the first contact and the second contact are respectively
electrically connected to the substrate through the corresponding
electrical contacts.
2. The light-emitting diode display device as claimed in claim 1,
wherein the light-emitting diode further includes a first
dielectric layer, and the first contact, the second contact and the
first dielectric layer are disposed on the same side of the main
body.
3. The light-emitting diode display device as claimed in claim 1,
wherein the light-emitting diode further includes a first
dielectric layer and a second dielectric layer, and the first
dielectric layer and the second dielectric layer are disposed on
opposite sides of the main body and have different dielectric
constants.
4. The light-emitting diode display device as claimed in claim 3,
wherein the light-emitting diode further includes: a third
dielectric layer, disposed between the main body and the first
contact; and a fourth dielectric layer, disposed between the main
body and the second contact; wherein the third dielectric layer and
the fourth dielectric layer have different dielectric
constants.
5. The light-emitting diode display device as claimed in claim 1,
wherein the diameter of the first contact is different from the
diameter of the second contact.
6. The light-emitting diode display device as claimed in claim 1,
wherein the light-emitting diode further includes a first
dielectric layer and a second dielectric layer, the main body
includes a first side and a second side opposite to the first side,
the first dielectric layer and the first contact are disposed on
the first side, the second dielectric layer and the second contact
are disposed on the second side, and the first dielectric layer and
the second dielectric layer have different dielectric
constants.
7. The light-emitting diode display device as claimed in claim 1,
wherein the light-emitting diode further includes a first
dielectric layer, wherein the main body has a trapezoidal
structure, a first side and a second side, the first side and the
second side are trapezoidal surfaces, and the first contact, the
second contact and the first dielectric layer are disposed on the
first side.
8. The light-emitting diode display device as claimed in claim 1,
wherein the main body is a trapezoidal body and has a first side
and a second side opposite to the first side, the light-emitting
diode further includes a first dielectric layer and a second
dielectric layer, the first dielectric layer and the first contact
are disposed on the first side, the second dielectric layer and the
second contact are disposed on the second side, and the first
dielectric layer and the second dielectric layer have different
dielectric constants.
9. The light-emitting diode display device as claimed in claim 1,
wherein the substrate further includes a driving circuit layer, and
the driving circuit layer includes a plurality of driving circuits
which are configured to drive the light-emitting diodes.
10. The light-emitting diode display device as claimed in claim 9,
wherein each of the driving circuits comprises: a first transistor,
having: a control terminal, electrically connected to a first
driving signal; a first terminal, electrically connected to a first
direct-current voltage; and a second terminal, electrically
connected to either the positive electrode or the negative
electrode of a light-emitting diode; a second transistor, having: a
control terminal, electrically connected to a second driving
signal; a first terminal, electrically connected to the second
terminal of the first transistor; and a second terminal,
electrically connected to a second direct-current voltage; a third
transistor, having: a control terminal, electrically connected to
the second driving signal; a first terminal, electrically connected
to the first direct-current voltage; and a second terminal,
electrically connected to the other of the positive electrode or
the negative electrode of the light-emitting diode; a fourth
transistor, having: a control terminal, electrically connected to
the first driving signal; and a first terminal, electrically
connected to the second end of the third transistor; and a second
terminal, electrically connected to the second direct-current
voltage; wherein the first direct-current voltage is greater than
the second direct-current voltage, and the first driving signal and
the second driving signal are square wave signals and complementary
signals.
11. The light-emitting diode display device as claimed in claim 9,
wherein each of the driving circuits comprises a transistor, and
the transistor has: a control terminal, electrically connected to a
driving signal; a first terminal, electrically connected to a
direct-current voltage; and a second terminal, electrically
connected to either the positive electrode or the negative
electrode of a light-emitting diode, and the other of the positive
electrode or the negative electrode of the light-emitting diode
being electrically connected to an alternating-current voltage.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a Divisional of application Ser. No.
15/662,522, filed Jul. 28, 2017, which claims the benefit of U.S.
Provisional Application No. 62/371,246 filed on Aug. 5, 2016, U.S.
Provisional Application No. 62/394,225 filed on Sep. 14, 2016, and
China Patent Application No. 201710249088.4, filed Apr. 17, 2017,
the entirety of which are incorporated by reference herein.
BACKGROUND OF THE DISCLOSURE
Field of the Disclosure
[0002] The present disclosure relates to a light-emitting diode
display device, and more particularly to a light-emitting diode
display device assembled using fluid self-assembly technology.
Description of the Related Art
[0003] An electronic display device is an optoelectronic device
capable of transforming electronic signals into a viewable image,
so that a viewer can watch the information loaded in the electronic
signals. Recently, electronic display devices such as
liquid-crystal displays and Organic electroluminescence displays
have become very popular.
[0004] A micro-light-emitting-diode display is an effective
solution to the problem of how to reduce the volume of an
electronic display device. In contrast to other types of display
devices, the micro-light-emitting-diode display has the advantages
of small size, high contrast, low power consumption, and fast
response time.
[0005] However, the size of the micro-light-emitting diode is very
small, so that the main problem in the manufacturing procedure is
how to accurately and stably assemble every micro-light-emitting
diode on a driving backplane of the display device.
[0006] Therefore, how to accurately and stably assemble every
micro-light-emitting diode on a driving backplane is an important
issue to be studied.
BRIEF SUMMARY OF THE DISCLOSURE
[0007] Accordingly, the disclosure provides a light-emitting diode
display device, to solve the problems described above.
[0008] In some embodiments, the disclosure provides a
light-emitting diode display device, including a light-emitting
diode and a substrate. The light-emitting diode includes a central
axis. The substrate includes a first connecting portion and a
second connecting portion. The central axis of the light-emitting
diode is extended through the first connecting portion. The second
connecting portion is disposed outside of the first connecting
portion and is spaced apart from the first connecting portion by a
distance which is greater than zero, and the first connecting
portion and the second connecting portion are respectively
electrically connected to the light-emitting diode.
[0009] In some embodiments, the disclosure further provides a
light-emitting diode display device including a substrate and a
plurality of light-emitting diodes. The substrate includes a
plurality of grooves, and an electrical contact is disposed in each
of the grooves. The light-emitting diodes are configured to install
in the grooves. Each of the light-emitting diodes includes a main
body, a first contact, and a second contact. The first contact and
the second contact are disposed on the main body, and the first
contact and the second contact are respectively electrically
connected to the substrate through the corresponding electrical
contacts.
[0010] The disclosure provides a light-emitting diode display
device applied to a display. The light-emitting diode display
device includes a substrate having a plurality of grooves and a
plurality of micro-light-emitting diodes. Each of the
micro-light-emitting diodes can include at least one dielectric
layer, so that the micro-light-emitting diode can be driven by an
external electric field to move toward the corresponding groove
during the fluid self-assembly procedure, so that the
micro-light-emitting diode is correctly installed in the
corresponding groove. The main body of the micro-light-emitting
diode can also be a cuboid or a trapezoid, and the
micro-light-emitting diode can be more accurately installed in the
corresponding groove on the substrate due to this design.
[0011] In addition, a connecting pad in the groove (such as the
first connecting portion) corresponding to the positive electrode
of the micro-light-emitting diode can be configured to be a
circular structure, and a connecting pad in the groove (such as the
second connecting portion) corresponding to the negative electrode
of the micro-light-emitting diode can be configured to be a ring
structure, so that the positive electrode and the negative
electrode of the micro-light-emitting diode can correctly contact
the corresponding connecting pads when the micro-light-emitting
diode is installed in the groove.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a diagram of a light-emitting diode display device
according to the first embodiment of the disclosure.
[0013] FIG. 2 is a diagram of a light-emitting diode display device
according to the second embodiment of the disclosure.
[0014] FIG. 3 and FIG. 4 are diagrams of a light-emitting diode
display device according to the third embodiment of the
disclosure.
[0015] FIG. 5 is a bottom view of a light-emitting diode in a flow
path according to the fourth embodiment of the disclosure.
[0016] FIG. 6 is a diagram of a light-emitting diode display device
according to the fifth embodiment of the disclosure.
[0017] FIG. 7 is a diagram of a light-emitting diode display device
according to the sixth embodiment of the disclosure.
[0018] FIG. 8 is a diagram of a light-emitting diode display device
according to the seventh embodiment of the disclosure.
[0019] FIG. 9 is a diagram of a first driving circuit according to
one embodiment of the disclosure.
[0020] FIG. 10 is a diagram of a second driving circuit according
to another embodiment of the disclosure.
[0021] FIG. 11 is a diagram of a light-emitting diode display
device according to the eighth embodiment of the disclosure.
[0022] FIG. 12 is a top view of a substrate and a groove in FIG.
11.
[0023] FIG. 13 is a diagram of a light-emitting diode display
device according to the ninth embodiment of the disclosure.
[0024] FIG. 14 is a top view of a substrate and a groove in FIG.
13.
[0025] FIG. 15 is a top view of the substrate and the groove
according to the tenth embodiment of the disclosure.
[0026] FIG. 16 is a sectional view along line A-A' in FIG. 15.
[0027] FIG. 17 is a sectional view of a substrate according to the
eleventh embodiment of the disclosure.
[0028] FIG. 18 is a sectional view of a substrate according to the
twelfth embodiment of the disclosure.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS
[0029] 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.
[0030] It should be understood that component for specific
description or specific figures can be present in any forms with
which the skilled person is familiar. In addition, when a layer is
"above" other layers or a substrate, it might be "directly" on the
layers or the substrate, or some other layers are between the layer
and other layers.
[0031] 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.
[0032] 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
[0033] Please refer to FIG. 1, which is a diagram of a
light-emitting diode display device 100 according to the first
embodiment of the disclosure. In this embodiment, the
light-emitting diode display device 100 includes a substrate 102
and a plurality of light-emitting diodes 200. Only one
light-emitting diode 200 is illustrated in this embodiment for
simplicity. Those light-emitting diodes 200 can be
micro-light-emitting-diodes. The substrate 102 can include a
driving circuit layer 103, an insulation layer 105 and a bottom
layer 107. The driving circuit layer 103 is disposed on the bottom
layer 107, and the insulation layer 105 is disposed on the driving
circuit layer 103 and forms a plurality of grooves. Only two
grooves 104 and 106 are illustrated in this embodiment for easy
explanation. The light-emitting diode 200 is configured to be
installed on the groove 104 and the groove 106, and the
light-emitting diode 200 includes a main body 202, a first contact
204, a second contact 206 and a first dielectric layer 208. In this
embodiment, the main body 202 is a cube or a cuboid, and the main
body 202 includes a first side 2021 and a second side 2022. The
first contact 204, the second contact 206 and the first dielectric
layer 208 are disposed on the same side of the main body 202. For
example, they can be disposed on the first side 2021 of the main
body 202.
[0034] During the fluid self-assembly procedure, the light-emitting
diode 200 and the substrate 102 is immersed in a fluid (not shown
in the figures). At this time, the light-emitting diode 200 is
located on a position P1 shown in FIG. 1, and the first contact 204
and the second contact 206 face upward. When an electric field E1
is applied to the light-emitting diode display device 100, the
first dielectric layer 208 of the light-emitting diode 200 is
induced and polarized, so that the first dielectric layer 208
correspondingly generates positive charges. Therefore, the
polarized light-emitting diode 200 is driven by the electric field
E1 to flip around the X axis to a position P2, and the
light-emitting diode 200 continues to move toward the substrate
102. After that, the first contact 204 and the second contact 206
can be respectively joined with the groove 104 and the groove 106,
so that the light-emitting diode 200 is installed on the substrate
102. At this time, the first contact 204 and the second contact 206
are respectively in contact with two electrical pads in the groove
104 and the groove 106, so that first contact 204 and the second
contact 206 are electrically connected to the driving circuit layer
103 via the two electrical pads.
The Second Embodiment
[0035] Please refer to FIG. 2, which is a diagram of a
light-emitting diode display device 100A according to the second
embodiment of the disclosure. In contrast to the first embodiment,
the light-emitting diode 200 A of the light-emitting diode display
device 100A further includes a second dielectric layer 210, and the
first dielectric layer 208 and the second dielectric layer 210 are
disposed on opposite sides of the main body 202. For example, the
first dielectric layer 208 is disposed on the first side 2021 of
the main body 202, and the second dielectric layer 210 is disposed
on the second side 2022 of the main body 202. The first dielectric
layer 208 and the second dielectric layer 210 have different
dielectric constants. In this embodiment, the dielectric constant
of the first dielectric layer 208 is greater than the dielectric
constant of the second dielectric layer 210.
[0036] During the fluid self-assembly procedure, the light-emitting
diode 200A is originally located on the position P1 shown in FIG.
2, and the first contact 204 and the second contact 206 face
upward. When an electric field E1 is applied to the light-emitting
diode display device 100A, the first dielectric layer 208 and the
second dielectric layer 210 of the light-emitting diode 200A are
induced and polarized, so that the first dielectric layer 208
correspondingly generates positive charges, and the second
dielectric layer 210 correspondingly generates negative charges.
Therefore, the polarized light-emitting diode 200A is driven by the
electric field E1 to flip around the X axis to the position P2, and
the light-emitting diode 200 continues to move toward the substrate
102. After that, the first contact 204 and the second contact 206
can be respectively joined with the groove 104 and the groove 106,
so that the light-emitting diode 200A is installed on the substrate
102.
The Third Embodiment
[0037] Please refer to FIG. 3 and FIG. 4, which are diagrams of a
light-emitting diode display device 100B according to the third
embodiment of the disclosure. In contrast to the light-emitting
diode 200A of the second embodiment, the light-emitting diode 200B
in this embodiment includes the first contact 204 and the second
contact 206 with different diameters, and the substrate 102
includes the groove 104 and the groove 106 respectively
corresponding to the first contact 204 and the second contact 206.
In this embodiment, the diameter DC1 of the first contact 204 is
greater than the diameter DC2 of the second contact 206.
Furthermore, the light-emitting diode 200B further includes a third
dielectric layer 212 and a fourth dielectric layer 214. The third
dielectric layer 212 is disposed between the main body 202 and the
first contact 204, the fourth dielectric layer 214 is disposed
between the main body 202 and the second contact 206, and the third
dielectric layer 212 and the fourth dielectric layer 214 have
different dielectric constants. For example, the dielectric
constant of the third dielectric layer 212 is greater than the
dielectric constant of the fourth dielectric layer 214.
[0038] As shown in FIG. 3, the light-emitting diode 200B is located
in the position P1. At this time, the first contact 204 with a
large diameter faces the groove 104 with a small size, and the
second contact 206 with a small diameter faces the groove 106 with
a large size. In order to install the light-emitting diode 200B on
the substrate 102, an electric field E2 is applied to the
light-emitting diode display device 100B, so that the third
dielectric layer 212 and the fourth dielectric layer 214 of the
light-emitting diode 200B are induced and polarized due to the
electric field E2, and then the third dielectric layer 212
correspondingly generates positive charges, and the fourth
dielectric layer 214 correspondingly generates negative charges.
Therefore, the polarized light-emitting diode 200B is driven by the
electric field E2 to rotate along the XY plane or flip around the Y
axis to the position P2 shown in FIG. 4.
[0039] After that, the electric field E2 is turned off and the
electric field E1 is turned on in FIG. 4, so that the first
dielectric layer 208 and the second dielectric layer 210 of the
light-emitting diode 200B are induced and polarized. The first
dielectric layer 208 correspondingly generates positive charges,
and the second dielectric layer 210 correspondingly generates
negative charges. Therefore, the polarized light-emitting diode
200B is driven to move along the Y axis toward the substrate 102,
so that the first contact 204 and the second contact 206 can be
respectively joined with the groove 104 and the groove 106. As a
result, the light-emitting diode 200B is installed on the substrate
102.
The Fourth Embodiment
[0040] Please refer to FIG. 5, which is a bottom view of a
light-emitting diode 200C in a flow path according to the fourth
embodiment of the disclosure. The structure of the light-emitting
diode 200C is similar to the light-emitting diode 200 in FIG. 1,
the difference between the two light-emitting diodes 200 and 200C
is that the main body 202 of the light-emitting diode 200C is a
trapezoidal structure. The first side 2021 is a trapezoidal surface
in a bottom view, and the first contact 204, the second contact 206
and the first dielectric layer 208 are disposed on the first side
2021. Similarly, the second side 2022 is also a trapezoidal surface
from a top view.
[0041] When the light-emitting diode 200C is disposed in the fluid
in the flow path and the flow direction is along the arrows in FIG.
5, the trapezoidal structure of the main body 202 can help the
light-emitting diode 200C to stably flow along the direction of the
fluid and the light-emitting diode 200C does not rotate or drift.
In addition, in other embodiment, the light-emitting diode 200C can
also has the first contact 204 and the second contact 206 with
different diameters.
The Fifth Embodiment
[0042] Please refer to FIG. 6, which is a diagram of a
light-emitting diode display device 100D according to the fifth
embodiment of the disclosure. In this embodiment, a light-emitting
diode 200D of the light-emitting diode display device 100D is
configured to join with the groove 104 of the substrate 102, and
the main body 202 of the light-emitting diode 200D includes the
first side 2021 and the second side 2022. The first dielectric
layer 208 and the first contact 204 are disposed on the first side
2021, and the second dielectric layer 210 and the second contact
206 are disposed on the second side 2022. The first dielectric
layer 208 and the second dielectric layer 210 can have different
dielectric constants. For example, the dielectric constant of the
first dielectric layer 208 is greater than the dielectric constant
of the second dielectric layer 210.
[0043] When the electric field E1 is applied to the light-emitting
diode display device 100D, the first dielectric layer 208 and the
second dielectric layer 210 of the light-emitting diode 200D are
induced and polarized, so that the first dielectric layer 208
correspondingly generates positive charges, and the second
dielectric layer 210 correspondingly generates negative charges.
Therefore, the polarized light-emitting diode 200D is driven by the
electric field E1 to move toward the groove 104, so that the first
contact 204 can join with the groove 104.
The Sixth Embodiment
[0044] Please refer to FIG. 7, which is a diagram of a
light-emitting diode display device 100E according to the sixth
embodiment of the disclosure. In this embodiment, the structure of
the light-emitting diode 200E of the light-emitting diode display
device 100E is similar to the light-emitting diode 200D of the
fifth embodiment, the difference is that the main body 202 of the
light-emitting diode 200E is a trapezoidal body. The first side
2021 and the second side 2022 of the main body 202 are rectangular
surfaces and are parallel to each other. The first dielectric layer
208 and the first contact 204 are disposed on the first side 2021,
and the second dielectric layer 210 and the second contact 206 are
disposed on the second side 2022. The first dielectric layer 208
and the second dielectric layer 210 can have different dielectric
constants.
[0045] For example, when it is desired to join the second contact
206 with the corresponding groove 104 using the electric field E1,
the dielectric constant of the second dielectric layer 210 needs to
be greater than the dielectric constant of the first dielectric
layer 208. In addition, when it is desired to join the first
contact 204 with the corresponding groove 106 using the electric
field E1, the dielectric constant of the first dielectric layer 208
needs to be greater than the dielectric constant of the second
dielectric layer 210.
The Seventh Embodiment
[0046] Please refer to FIG. 8, which is a diagram of a
light-emitting diode display device 100F according to the seventh
embodiment of the disclosure. In this embodiment, the
light-emitting diode display device 100F can be a sub-pixel of one
pixel in a display panel, and the light-emitting diode display
device 100F includes a light-emitting diode 200F, a light-emitting
diode 200G and a light-emitting diode 200H. The contact areas of
the light-emitting diode 200F, light-emitting diode 200G and
light-emitting diode 200H with the driving circuit layer 103 are
different. They can emit light beams with the same wavelength, or
they can be different light-emitting diodes respectively emitting
light beams with different wavelengths, such as red light, green
light or blue light. The structures of the light-emitting diode
200F, light-emitting diode 200G and light-emitting diode 200H are
similar to the light-emitting diode 200D in the fifth embodiment,
and the substrate 102 includes a groove 104, a groove 106 and a
groove 108 corresponding to the light-emitting diodes 200F, 200G
and 200H.
[0047] During the fluid self-assembly procedure, the order of
installing the light-emitting diodes 200F, 200G and 200H on the
corresponding grooves 104, 106 and 108 is according to their size
(from the smallest one to the biggest one). For example, the
light-emitting diode 200H corresponding to the bigger groove 108 is
installed on the groove 108 at first, and then the light-emitting
diode 200G is installed on the groove 106. Finally, the
light-emitting diode 200F with the smallest size is installed on
the groove 104. This order of installation can prevent the
light-emitting diode from being installed on a wrong groove in the
procedure of installation. For example, if the light-emitting diode
200G is installed first, then the light-emitting diode 200G may
join with the groove 108 instead of the corresponding groove
106.
[0048] It should be noted that, because the sub-pixel (the
light-emitting diode display device 100F) includes three
light-emitting diodes 200F, 200G and 200H, if one of the
light-emitting diodes is broken, the remaining two light-emitting
diodes can serve as substitutes for the broken one and continue to
emit light beams.
[0049] Please refer to FIG. 9, which is a diagram of a first
driving circuit 110 according to one embodiment of the disclosure.
The driving circuit layer 103 includes a plurality of first driving
circuits 110, configured to drive the light-emitting diodes. Each
of the first driving circuits 110 includes a first transistor Ml, a
second transistor M2, a third transistor M3, and a fourth
transistor M4. A first terminal of the first transistor M1 is
electrically connected to a first direct-current voltage VDD, a
second terminal of the first transistor M1 is electrically
connected to an electrical contact EC1, and a control terminal of
the first transistor M1 is electrically connected to a first
driving signal EM1. A control terminal of the second transistor M2
is electrically connected to a second driving signal EM2, a first
terminal of the second transistor M2 is electrically connected to
the second terminal of the first transistor Ml, and a second
terminal of the second transistor M2 is electrically connected to a
second direct-current voltage VSS.
[0050] A control terminal of the third transistor M3 is
electrically connected to the second driving signal EM2, a first
terminal of the third transistor M3 is electrically connected to
the first direct-current voltage VDD, and a second terminal of the
third transistor M3 is electrically connected to an electrical
contact EC2. A control terminal of the fourth transistor M4 is
electrically connected to the first driving signal EM1, a first
terminal of the fourth transistor M4 is electrically connected to
the second terminal of the third transistor M3, and a second
terminal of the fourth transistor M4 is electrically connected to
the second direct-current voltage VSS. The first direct-current
voltage VDD is greater than the second direct-current voltage VSS,
and the first driving signal EM1 and the second driving signal EM2
are square wave signals and complementary signals.
[0051] Take the first embodiment for example, the electrical
contact EC1 can be an electrical contact disposed in the groove
104, and the electrical contact EC2 can be an electrical contact in
the groove 106. The first contact 204 of the light-emitting diode
200 can be the positive electrode configured to be electrically
connected to the electrical contact EC1, and the second contact 206
can be the negative electrode configured to be electrically
connected to the electrical contact EC2. In this configuration,
when the first driving signal EM1 is at a high voltage level, the
first transistor M1 and the fourth transistor M4 are turned on, so
as to drive the light-emitting diode 200 to emit the light.
[0052] Conversely, during the fluid self-assembly procedure, the
positive electrode (first contact 204) of the light-emitting diode
200 may be electrically connected to the electrical contact EC2,
and the negative electrode (second contact 206) may be electrically
connected to the electrical contact EC1. In this configuration,
when the second driving signal EM2 is at a high voltage level, the
third transistor M3 and the second transistor M2 are turned on, so
that the light-emitting diode 200 is driven to emit the light. It
can be known according to the description above that when the first
contact 204 and the second contact 206 of the light-emitting diode
200 are respectively electrically connected to the electrical
contact EC1 and the electrical contact EC2, the light-emitting
diode 200 is driven by the first driving circuit 110 to emit the
light, and when the first contact 204 and the second contact 206
are respectively electrically connected to the electrical contact
EC2 and the electrical contact EC1, the light-emitting diode 200 is
driven by the first driving circuit 110 to emit the light as
well.
[0053] Please refer to FIG. 10, which is a diagram of a second
driving circuit 120 according to another embodiment of the
disclosure. In this embodiment, the driving circuit layer 103 can
include a plurality of second driving circuits 120, configured to
drive the light-emitting diodes. Each of the second driving
circuits 120 includes a fifth transistor M5 which has a control
terminal, a first terminal and a second terminal. The control
terminal of the fifth transistor M5 is electrically connected to a
driving signal EM, the first terminal of the fifth transistor M5 is
electrically connected to a direct-current voltage (such as the
second direct-current voltage VSS), the second terminal of the
fifth transistor M5 is electrically connected to the electrical
contact EC1, and the electrical contact EC2 is electrically
connected to an alternating-current voltage AC.
[0054] Similarly, take the first embodiment for example, the
electrical contact EC1 can be an electrical contact disposed in the
groove 104, and the electrical contact EC2 can be an electrical
contact in the groove 106. The first contact 204 of the
light-emitting diode 200 can be the positive electrode configured
to be electrically connected to the electrical contact EC1, and the
second contact 206 can be the negative electrode configured to be
electrically connected to the electrical contact EC2. In this
configuration, when the driving signal EM is at a high voltage
level and the second direct-current voltage VSS is greater than a
voltage level of the alternating-current voltage AC, the fifth
transistor M5 is turned on, so as to drive the light-emitting diode
200 to emit the light.
[0055] Conversely, during the fluid self-assembly procedure, the
positive electrode (first contact 204) of the light-emitting diode
200 may be electrically connected to the electrical contact EC2,
and the negative electrode (second contact 206) may be electrically
connected to the electrical contact EC1. In this configuration,
when the driving signal EM is at a high voltage level and the
second direct-current voltage VSS is less than the voltage level of
the alternating-current voltage AC, the fifth transistor M5 is
turned on, so that the light-emitting diode 200 is driven to emit
the light. It can be known according to the description above that
when the first contact 204 and the second contact 206 of the
light-emitting diode 200 are respectively electrically connected to
the electrical contact EC1 and the electrical contact EC2, the
light-emitting diode 200 is driven by the second driving circuit
120 to emit the light, and when the first contact 204 and the
second contact 206 are respectively electrically connected to the
electrical contact EC2 and the electrical contact EC1, the
light-emitting diode 200 is driven by the second driving circuit
120 to emit the light as well.
The Eighth Embodiment
[0056] Please refer to FIG. 11, which is a diagram of a
light-emitting diode display device 100I according to the eighth
embodiment of the disclosure. In this embodiment, the
light-emitting diode 200I can include a plurality of light-emitting
diodes 200I and a substrate 102A. Only one light-emitting diode
200I and a groove 104A on the substrate 102A are illustrated in
FIG. 11 for simplicity. The light-emitting diode 200I includes a
first contact 204 and a second contact 206. The first contact 204
is disposed on the bottom of the light-emitting diode 200I, and the
central axis C of the light-emitting diode 200I is extended through
the first contact 204. The second contact 206 is disposed on the
bottom of the light-emitting diode 200I and is spaced apart from
the central axis C by a distance. In this embodiment, the first
contact 204 is the positive electrode of the light-emitting diode
200I, and the width of the first contact 204 can be 13 .mu.m, but
it is not limited thereto. The second contact 206 is disposed on
two sides of the first contact 204, and the width of the second
contact 206 can be 9 .mu.m. The distance between the second contact
206 and the first contact 204 is 4 .mu.m, but it is not limited
thereto.
[0057] Please refer to FIG. 11 and FIG. 12. FIG. 12 is a top view
of the substrate 102A and the groove 104A in FIG. 11. The substrate
102A can include a metal layer 101, an insulation layer 105, a
bottom layer 107 and a side wall structure 109. The metal layer 101
is disposed on the bottom layer 107 and is electrically connected
to a driving circuit (not shown in the figures), and the insulation
layer 105 is disposed on the metal layer 101. The side wall
structure 109 can form the groove 104A, which is on the insulation
layer 105 to contain the light-emitting diode 200I. A first
connecting portion 112 and a second connecting portion 114 are
disposed in the groove 104A. As shown in FIG. 12, when viewed along
the central axis C, the first connecting portion 112 is a circular
structure and is positioned on the center of the groove 104A. The
second connecting portion 114 is a ring structure which surrounds
the first connecting portion 112. The first connecting portion 112
is configured to be electrically connected to the first contact
204, and the second connecting portion 114 is configured to be
electrically connected to the second contact 206. In this
embodiment, the distance between the first connecting portion 112
and the second connecting portion 114 can be 7.3 .mu.m, but it is
not limited thereto.
[0058] In addition, the substrate 102A further includes a first
through hole 116 and a second through hole 118. The first through
hole 116 penetrates the insulation layer 105, and a conductive
material is disposed in the first through hole 116, such as
titanium, but it is not limited thereto. The first through hole 116
is configured to be electrically connected to the first connecting
portion 112 and the metal layer 101. The second through hole 118
penetrates the insulation layer 105, and a conductive material is
disposed in the second through hole 118, such as titanium. The
second through hole 118 is configured to be electrically connected
to the second connecting portion 114 and the metal layer 101. In
this embodiment, the center of curvature of the first connecting
portion 112 is located in the first through hole 116. The second
through hole 118 is a ring structure when viewed along the central
axis C (as shown in FIG. 12). The width W2 of the second through
hole 118 is less than the width W1 of the second connecting portion
114, and the second through hole 118 is close to the outside of the
second connecting portion 114.
[0059] During the fluid self-assembly procedure, the light-emitting
diode 200I enters the groove 104A, so that the first contact 204
and the second contact 206 are respectively in contact with the
first connecting portion 112 and the second connecting portion 114.
As a result, the light-emitting diode 200I can be electrically
connected to the driving circuit (not shown in the figures), so
that the driving circuit drives the light-emitting diode 200I to
emit the light.
[0060] It should be noted that the diameter D1 (such as 45.7 .mu.m)
of the groove 104A is greater than the diameter D2 (such as 41
.mu.m) of the light-emitting diode 200I. Therefore, when the
light-emitting diode 200I enters the groove 104A, the central axis
C of the light-emitting diode 200I may diverge from the central
axis C1 of the groove 104A. However, because of the structural
design of this embodiment, the first contact 204 and the second
contact 206 can still be respectively connected to the first
connecting portion 112 and the second connecting portion 114, and
the first contact 204 does not contact the second connecting
portion 114 and the second contact 206 does not contact the first
connecting portion 112.
The Ninth Embodiment
[0061] Please refer to FIG. 13 and FIG. 14. FIG. 13 is a diagram of
a light-emitting diode display device 100J according to the ninth
embodiment of the disclosure. FIG. 14 is a top view of the
substrate 102A and the groove 104A in FIG. 13. The structure of the
light-emitting diode display device 100J in this embodiment is
similar to the structure of the light-emitting diode display device
100I in the eighth embodiment. The difference is that the first
through hole 116 and the conductive material thereof are ring
structures when viewed along the central axis C, which are
configured to surround the first connecting portion 112. The
contact area of the first contact 204 of the light-emitting diode
200I and the first connecting portion 112 is increased due to this
structural design, so as to increase the transmission efficiency of
signals between the light-emitting diode 200I and the driving
circuit.
The Tenth Embodiment
[0062] Please refer to FIG. 15 and FIG. 16. FIG. 15 is a top view
of the substrate 102A and the groove 104A according to the tenth
embodiment of the disclosure. FIG. 16 is a sectional view along
line A-A' in FIG. 15. The structure of the light-emitting diode
display device 100K in FIG. 16 is similar to the structure of the
light-emitting diode display device 100I in the eighth embodiment.
The difference is that the first connecting portion 112 includes a
circular portion 1121 and a protruding portion 1122 which are
connected to each other. The second connecting portion 114 and the
second through hole 118 are arc structures when viewed along the
central axis C, and the angle of the arc structures relative to the
central axis C is greater than 180 degrees. Furthermore, as shown
in FIG. 15, the protruding portion 1122 protrudes from the circular
portion 1121 toward a notch in the arc structure, and the first
through hole 116 is disposed under the protruding portion 1122. The
contact area of the first contact 204 of the light-emitting diode
200I and the first connecting portion 112 is increased due to this
structural design, so as to increase the transmission efficiency of
signals between the light-emitting diode 200I and the driving
circuit.
The Eleventh Embodiment
[0063] Please refer to FIG. 17, which is a sectional view of a
substrate 102B according to the eleventh embodiment of the
disclosure. In this embodiment, the substrate 102B includes an
active area A1 and a non-active area A2. The plurality of grooves
104A are formed in the active area A1, and the substrate 102B
further includes a ramp structure S disposed adjacent to a boundary
of the non-active area A2 and the active area A1. During the fluid
self-assembly procedure, the light-emitting diodes are guided by
the ramp structure S to smoothly move from the non-active area A2
to the active area A1, and then the light-emitting diodes enter the
grooves 104A.
The Twelfth Embodiment
[0064] Please refer to FIG. 18, which is a sectional view of a
substrate 102C according to the twelfth embodiment of the
disclosure. Similar to the eleventh embodiment, the substrate 102C
includes an active area A1 and a non-active area A2. The substrate
102C further includes at least one hole H disposed in the
non-active area A2 of the substrate 102C, and the diameter D3 of
the hole H is less than the diameter (diameter D1) of the groove
104A. During the fluid self-assembly procedure, the light-emitting
diode moves from the non-active area A2 to the active area A1. The
diameter of light-emitting diode (such as diameter D2) is slightly
less than the diameter D1 and greater than the diameter D3 of the
hole H, so that the light-emitting diode enters the groove 104A
instead of falling in the hole H when the light-emitting diode
moves.
[0065] Those light-emitting diode display devices provided in this
disclosure can be applied to a display product served as a light
source of the display product.
[0066] In conclusion, the disclosure provides a light-emitting
diode display device applied to a display. The light-emitting diode
display device includes a substrate having a plurality of grooves
and a plurality of micro-light-emitting diodes. Each of the
micro-light-emitting diodes can include at least one dielectric
layer, so that the micro-light-emitting diode can be driven by an
external electric field to move toward the corresponding groove
during the fluid self-assembly procedure, so that the
micro-light-emitting diode is correctly installed in the
corresponding groove. The main body of the micro-light-emitting
diode can also be a cuboid or a trapezoid, and the
micro-light-emitting diode can be more accurately installed in the
corresponding groove on the substrate due to this structural
design.
[0067] In addition, a connecting pad in the groove (such as the
first connecting portion 112) corresponding to the positive
electrode of the micro-light-emitting diode can be configured to be
a circular structure, and a connecting pad in the groove (such as
the second connecting portion 114) corresponding to the negative
electrode of the micro-light-emitting diode can be configured to be
a ring structure, so that the positive electrode and the negative
electrode of the micro-light-emitting diode can correctly contact
the corresponding connecting pads when the micro-light-emitting
diode is installed in the groove.
[0068] 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.
* * * * *