U.S. patent application number 15/752198 was filed with the patent office on 2020-05-07 for touch substrate and touch display device.
This patent application is currently assigned to BOE TECHNOLOGY GROUP CO., LTD.. The applicant listed for this patent is Qingpu ZHANG WANG. Invention is credited to Tsung Chieh KUO, Qingpu WANG, Jiawei XU, Lei ZHANG, Zhi ZHANG.
Application Number | 20200142538 15/752198 |
Document ID | / |
Family ID | 57716088 |
Filed Date | 2020-05-07 |
United States Patent
Application |
20200142538 |
Kind Code |
A2 |
WANG; Qingpu ; et
al. |
May 7, 2020 |
TOUCH SUBSTRATE AND TOUCH DISPLAY DEVICE
Abstract
The present disclosure provides a touch substrate and a touch
display device. The touch substrate includes: a touch structure
(10), at least a part of which is located in the main touch region
(02); and a connecting member (50) and a wiring, at least partially
located in the wiring region (01), wherein the connecting member
(50) is configured to electrically connect the touch structure (10)
and the wiring (01); the connecting member (50) has a hollow
portion. Such that, touch sensitivity can be improved.
Inventors: |
WANG; Qingpu; (Beijing,
CN) ; ZHANG; Lei; (Beijing, CN) ; KUO; Tsung
Chieh; (Beijing, CN) ; ZHANG; Zhi; (Beijing,
CN) ; XU; Jiawei; (Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
WANG; Qingpu
ZHANG; Lei
KUO; Tsung Chieh
ZHANG; Zhi
XU; Jiawei |
Beijing
Beijing
Beijing
Beijing
Beijing |
|
CN
CN
CN
CN
CN |
|
|
Assignee: |
BOE TECHNOLOGY GROUP CO.,
LTD.
Beijing
CN
HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
Anhui
CN
|
Prior
Publication: |
|
Document Identifier |
Publication Date |
|
US 20190354240 A1 |
November 21, 2019 |
|
|
Family ID: |
57716088 |
Appl. No.: |
15/752198 |
Filed: |
July 31, 2017 |
PCT Filed: |
July 31, 2017 |
PCT NO: |
PCT/CN2017/095236 PCKC 00 |
371 Date: |
February 12, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06F 3/04164 20190501;
G06F 2203/04112 20130101; G06F 3/0446 20190501; G06F 3/0443
20190501; G06F 2203/04111 20130101 |
International
Class: |
G06F 3/044 20060101
G06F003/044 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 27, 2016 |
CN |
201610856232.6 |
Claims
1. A touch substrate, comprising: a touch structure, at least a
part of which is located in a main touch region; a connecting
member and a wiring, at least partially located in a wiring region,
wherein the connecting member is configured to electrically connect
the touch structure and the wiring, and the connecting member has a
hollow portion.
2. The touch substrate according to claim 1, further comprising: an
organic layer, at least partially located in the wiring region and
overlapping the connecting member and the wiring.
3. The touch substrate according to claim 1 or 2, wherein the
connecting member is in a mesh structure.
4. The touch substrate according to any one of claims 1 to 3,
wherein a length of the connecting member is 1.about.5 mm.
5. The touch substrate according to any one of claims 1 to 4,
wherein a width of the connecting member is 0.2.about.0.3 mm.
6. The touch substrate according to claim 2, wherein the touch
structure comprises a first touch electrode and a second touch
electrode which are insulated from and intersect with each other,
the first touch electrode comprises a plurality of first touch
sub-electrodes, and the plurality of first touch sub-electrodes are
electrically connected by a bridge; the bridge are isolated from
the second touch electrode by an insulating layer; the organic
layer and the insulating layer are located in a same layer and made
of same material.
7. The touch substrate according to claim 6, wherein the organic
layer is a first coating protection layer.
8. The touch substrate according to claim 6 or 7, wherein the
bridge, the connecting member and the wiring are in a same layer
and made of same material.
9. The touch substrate according to any one of claims 6 to 8,
wherein the bridge is in a bar structure; a length of the bridge is
100.about.300 .mu.m.
10. The touch substrate according to any one of claims 6 to 9,
wherein a width of the bridge is 5.about.10 .mu.m.
11. The touch substrate according to any one of claims 1 to 10,
further comprising a light shielding layer disposed in the wiring
region.
12. The touch substrate according to claim 11, wherein the light
shielding layer is a white light shielding layer or a black light
shielding layer.
13. The touch substrate according to claims 1 to 11, further
comprising a second coating protection layer overlapping the touch
structure.
14. The touch substrate according to claim 13, wherein an
explosion-proof film is disposed on the protection layer.
15. The touch substrate according to any one of claims 1 to 14,
wherein the connecting member is a metal connecting bar.
16. A touch display device, comprising: a display panel, and a
touch substrate disposed on a light emitting side of the display
panel, wherein the touch substrate is the touch substrate according
to any one of claims 1 to 15.
17. The touch display device according to claim 16, wherein the
display panel is a liquid crystal display panel or an organic light
emitting diode display panel.
Description
TECHNICAL FIELD
[0001] Embodiments of the present disclosure relate to a touch
substrate and a touch display device.
BACKGROUND
[0002] In recent years, with improvement of controllability of
electronic equipment and development of electronic technology,
touch screen technology has been widely used in electronic devices
such as mobile phones, tablet computers, notebook computers and the
like. There have been a variety of technical directions appearing
under the development of touch technology, such as resistance,
capacitance, and electromagnetism, and the capacitive screen with
low cost and excellent user experience has become a mainstream
product.
SUMMARY
[0003] Embodiments of the present disclosure provide a touch
substrate and a touch display device, which can improve touch
sensitivity.
[0004] An embodiment of the present disclosure provides a touch
substrate, which includes: a touch structure, at least a part of
which is located in a main touch region; a connecting member and a
wiring which are at least partially located in a wiring region,
wherein the connecting member is configured to electrically connect
the touch structure and the wiring, and the connecting member has a
hollow portion.
[0005] In one example, the touch substrate further includes an
organic layer at least partially located in the wiring region and
overlapping the connecting member and the wiring.
[0006] In one example, the metal connecting bar is in a mesh
structure.
[0007] In one example, a length of the metal connecting bar is
1.about.5 mm.
[0008] In one example, a width of the metal connecting bar is
0.2.about.0.3 mm.
[0009] In one example, the touch structure includes a first touch
electrode and a second touch electrode which are insulated from and
intersect with each other, the first touch electrode includes a
plurality of first touch sub-electrodes, and the plurality of first
touch sub-electrodes are electrically connected by a bridge; the
bridge are isolated from the second touch electrode by an
insulating layer; the organic layer and the insulating layer are
located in a same layer.
[0010] In one example, the organic layer is a first coating
protection layer.
[0011] In one example, the bridge, the metal connecting bar and the
wiring is in a same layer.
[0012] In one example, the bridge is in a bar structure; a length
of the bridge is 100.about.300 .mu.m.
[0013] In one example, the width of a bridge is 5.about.10
.mu.m.
[0014] In one example, the touch substrate further includes a light
shielding layer disposed in the wiring region.
[0015] In one example, the light shielding layer is a white light
shielding layer or a black light shielding layer.
[0016] In one example, the touch substrate further includes a
second coating protection layer overlapping the touch
structure.
[0017] In one example, an explosion-proof film is disposed on the
protection layer.
[0018] Another embodiment of the present disclosure provides a
touch display device, which includes a display panel and a touch
substrate disposed on a light emitting side of the display panel,
wherein the touch substrate is a touch substrate as described
above.
[0019] In one example, the display panel is a liquid crystal
display panel or an organic light emitting diode display panel.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to describe technical solutions in embodiments of
the present disclosure more clearly, the accompanying drawings in
the embodiments will be introduced briefly. Obviously, the
accompanying drawings to be described below merely relate to some
embodiments of the present disclosure, but do not constitute a
limitation to the disclosure.
[0021] In order to describe technical solutions in embodiments of
the present disclosure or in the prior art more clearly, the
accompanying drawings to be used in the description of embodiments
or the prior art will be introduced briefly. Obviously, the
accompanying drawings to be described below are merely some
embodiments of the present disclosure, and a person of ordinary
skill in the art can obtain other drawings according to those
drawings without paying any creative effort.
[0022] FIG. 1 is a schematic structural view of a touch
substrate;
[0023] FIG. 2 is a schematic plan structural view of a touch
substrate provided by an embodiment of the present disclosure;
[0024] FIG. 3 is a cross-sectional view along the direction of A-A'
in FIG. 2;
[0025] FIG. 4(a) is a schematic structural view of a metal
connecting bar provided by an embodiment of the present
disclosure;
[0026] FIG. 4(b) is a schematic structural view of a metal
connecting bar provided by an embodiment of the present
disclosure;
[0027] FIG. 4(c) is a schematic structural view of a metal
connecting bar provided by an embodiment of the present
disclosure;
[0028] FIG. 4(d) is a schematic structural view of a metal
connecting bar provided by an embodiment of the present
disclosure;
[0029] FIG. 5(a) is a schematic plan structural view of a touch
substrate provided by an embodiment of the present disclosure;
[0030] FIG. 5(b) is a schematic cross-sectional view along the
direction of B-B' in FIG. 5(a)
[0031] FIG. 6(a) is a schematic plan view of a touch substrate
provided by an embodiment of the present disclosure;
[0032] FIG. 6(b) is a schematic cross-sectional view along the
direction of C-C' in FIG. 6(a)
[0033] FIG. 7 is another schematic cross-sectional view along the
direction of C-C' in FIG. 6(a).
DETAILED DESCRIPTION
[0034] In order to make purposes, technical solutions and
advantages of embodiments of the present disclosure more clear, the
technical solutions in the embodiments of the present disclosure
will be described clearly and completely with reference to the
accompanying drawings in the embodiments of the present disclosure.
Obviously, the embodiments to be described are merely a part of but
not all of embodiments of the present disclosure. All other
embodiments made by a person of ordinary skill in the art without
paying any creative effort shall be included in the protection
scope of the present disclosure on the basis of the described
embodiments of the present disclosure.
[0035] One Glass Solution (abbreviated as OGS) technology means
that a touch structure is formed on a cover glass, and the cover
glass serves dual roles of protection function and touch function
at the same time. A light shielding layer that serves roles of
shielding wirings and decorative effect is further formed in a
wiring region of the cover glass.
[0036] In a touch substrate, as shown in FIG. 1, a touch structure
10 is connected to an IC (Integrated Circuit) via a wiring 20 in a
wiring region 01. However, since the area of the wiring 20 is
greatly different from that of the touch structure 10, a large
metal impedance is easily generated, thereby affecting touch
sensitivity.
[0037] An embodiment of the present disclosure provides a touch
substrate 100. As shown in FIG. 2, the touch substrate 100 includes
a main touch region 02 and a wiring region 01.
[0038] The touch substrate 100 includes a base substrate S, and a
touch structure 10 disposed on the base substrate 10, and the touch
structure 10 is in the main touch region 02. The touch structure 10
includes a first touch electrode 11 and a second touch electrode 12
which are insulated from and intersect with each other.
[0039] The touch substrate 100 includes an organic layer 40
disposed in the wiring region 01.
[0040] The touch substrate 100 further includes a metal connecting
bar 50 and a wiring 20 disposed on the organic layer 40, and the
metal connecting bar 50 is used for electrically connecting the
first touch electrode 11 as well as the second touch electrode 12
to the wiring 20 respectively. As shown in FIGS. 3, 4(a) and 4(b),
the metal connecting bar 50 has a hollow portion. Here, the hollow
portion means, for example, an opening in a thickness direction
(for example, in a direction perpendicular to the base substrate S)
of the metal connecting bar 50.
[0041] For example, a contact area between the metal connecting bar
50 and the touch structure (for example, the first touch electrode
11 or the second touch electrode 12) is larger than that between
the metal connecting bar 50 and the wiring 20. Here, the contact
area between the metal connecting bar 50 and the touch structure
means, for example, a direct contact area between the metal
connecting bar 50 and the touch structure. And the contact area
between the metal connecting bar 50 and the wiring 20 means, for
example, a direct contact area between the metal connecting bar 50
and the wiring 20.
[0042] It should be noted that, firstly, the touch structure 10 is
not limited, as long as the touch function can be realized, and the
touch structure 10 in FIG. 2 is merely illustrative.
[0043] Secondly, the main touch region 02 is a region for picture
display when the touch substrate 100 is applied to a display
device. The wiring region 01 is located on the periphery of the
main touch region 02.
[0044] Thirdly, the specific shape of the metal connecting bar 50
is not limited, as long as the metal connecting bar 50 has a hollow
portion. The metal connecting bar 50 in FIG. 2, 3, 4(a) or 4(b) is
merely illustrative.
[0045] Fourthly, for any metal connecting bar 50, one end of it is
electrically connected to the first touch electrode 11 or the
second touch electrode 12, and the other end is electrically
connected to the wiring 20, such that the first touch electrode 11
or the second touch electrode 12 is electrically connected to the
wiring 20.
[0046] The wire 20 and the metal connecting bar 50 may be disposed
in a same layer or in different layers, which is not limited
herein.
[0047] Fifthly, the relative position of the organic layer 40 and
the touch structure 10 is not limited, and FIG. 2 is merely
illustrative.
[0048] The embodiment of the present disclosure provides a touch
substrate 100. By disposing the metal connecting bar 50 in the
wiring region 01 of the touch substrate 100, the first touch
electrode 11 as well as the second touch electrode 12 are
electrically connected with the wiring 20 though the metal
connecting bar 50, respectively. The contact area between the
wiring 20 and the first touch electrode 11, and the contact area
between the wiring 20 and the second touch electrode 12 are
accordingly increased and thus metal impedance is reduced, so touch
sensitivity is improved.
[0049] When the metal connecting bar 50 is disposed on the organic
layer 40, the adhesion of the metal connecting bar 50 to the
organic layer 40 is small due to differences in material properties
between the metal connecting bar 50 and the organic layer 40. And
when the metal connecting bar 50 is formed on the layer 40, a
defect is easily formed between the organic layer 40 and the metal
connecting bar 50, and the adhesion at the defect position is
worse. In this way, when the touch substrate 100 needs rework, such
as analysis, disassembly, repair or the like, the metal connecting
bar 50 is to be subjected to a force in a tearing direction which
makes the metal connecting bar 50 separated from the organic layer
40. As a result, the metal connecting bar 50 is separated from the
first touch electrode 11 or the second touch electrode 12, and thus
signals on the touch structure 10 are unable to be transmitted to
the IC, thereby affecting the touch function of a product and
reducing product yield. Based on this, by making the metal
connecting bar 50 have a hollow portion, the embodiment of the
present disclosure may reduce the contact area between the metal
connecting bar 50 and the organic layer 40, and thus reduce the
probability of forming defects, resulting in reducing the
probability of a separation between the metal connecting bar 50 and
the organic layer 40 and improving the product yield.
[0050] For example, the metal connecting bar 50 has a mesh
structure as shown in FIG. 4(c) or 4(d).
[0051] Specific pattern of the mesh is not limited. For example,
the pattern of the mesh may be in rhombus as shown in FIG. 4(c), or
the pattern of the mesh may be in rectangle as shown in FIG. 4(d).
Of course, the pattern of the mesh may be in another shape.
[0052] In the embodiment of the present disclosure, the metal
connecting bar 50 is arranged in a mesh structure. That is, the
metal connecting bar 50 includes two intersecting sets of metal
wires, and each set of metal wires includes, for example, a
plurality of metal wires parallel to each other. The two sets are
located in different directions. On one hand, when subjected to an
external force in a single direction, if one set of metal wires is
separated from the organic layer 40, the other set of metal wires
can remain adhering to the organic layer 40 to ensure that signals
on the touch structure 10 can be transmitted to the IC, thereby
improving the product yield. On the other hand, the contact portion
between the metal connecting bar 50 and the organic layer 40 is a
plurality of metal wires, and the contact area between the metal
wires and the organic layer 40 is small, so as to reduce the
probability of forming defects. As a result, the probability of the
separation between the metal connecting bar 50 and the organic
layer 40 is reduced, and the product yield is improved.
[0053] In addition, the metal connecting bar 50 in a mesh structure
can be directly formed under one patterning process without
affecting formation of other structures and without increasing
process difficulty.
[0054] In order to simplify the structure of a product, in an
embodiment of the present disclosure, for example, the length of
the metal connecting bar 50 is 1.about.5 mm; and/or the width of
the metal connecting bar 50 is 0.2.about.0.3 mm.
[0055] Based on the above, for example, as shown in FIGS. 5(a) and
5(b), the first touch electrode 11 is electrically connected
through a bridge 13 in a region which the first touch electrode and
the second touch electrode cross. The bridge 13 is isolated from
the second touch electrode 12 by an insulating block 14. The
organic layer 40 is a first coating protection layer 41. The
insulating block 14 is provided in a same layer with the first
coating protection layer 41.
[0056] The coating protection layer is OC (Over Coating).
[0057] Based on this, for example, both the material of the first
touch electrode 11 and the second touch electrode 12 are
transparent conductive material, such as ITO (Indium Tin Oxide),
IZO (Indium Zinc Oxide) and the like. The shape of the first touch
electrode 11 or the second touch electrode 12 may be rhombus, bar,
cross, snowflake or the like.
[0058] In the embodiment of the present disclosure, the insulating
block 14 is provided in the same layer with the first coating
protection layer 41. The material of the insulating block 14 and
the first coating protection layer 41 is, for example, the
same.
[0059] That is, by forming the insulating block 14 and the first
coating protection layer 41 under a same patterning process, the
number of patterning processes can be reduced and an aperture ratio
can be increased.
[0060] Further, in order to reduce the number of patterning
processes and make the touch substrate 100 lighter and thinner, in
an embodiment of the present disclosure, for example, the bridge
13, the metal connecting bar 50 and the wiring 20 are disposed on a
same layer. The material of the bridge 13, the metal connecting bar
50 and the wiring 20 are the same.
[0061] That is, the bridge 13, the metal connecting bar 50 and the
wiring 20 are made of the same material, and formed under one
patterning process.
[0062] In order to improve the aperture ratio of the touch
substrate 100, in an embodiment of the present disclosure, for
example, the bridge 13 is in a bar structure, and its length is
100.about.300 .mu.m, and/or its width is 5.about.10 .mu.m.
[0063] A light shielding layer (for example, a white light
shielding layer or a black light shielding layer) is used to shield
the frame of a metal wiring electronic device. Therefore, in the
embodiment of the present disclosure, for example, as shown in FIG.
6(a), the touch substrate 100 further includes a light shielding
layer 30 disposed in the wiring region 01. The light shielding
layer 30 is a white or black light shielding layer.
[0064] Since the light shielding layer 30 contains a conductive
element and has certain conductivity, the problem of ESD
(Electro-Static Discharge) may be caused between the metal
connecting bar 50 and the light shielding layer 30 in the wiring
region 01 of the touch substrate 100. As a result, the performance
of the touch substrate 100 decreases, or even be damaged, thereby
reducing the product yield. Therefore, as shown in FIG. 6(b), the
light shielding layer 30 is located, for example, at the bottom of
the touch substrate 100, so that the first coating protection layer
41 is located between the metal connecting bar 50 and the light
shielding layer 30 to prevent ESD from being generated between the
metal connecting bar 05 and the light shielding layer 30.
[0065] For example, as shown in FIG. 6(b), a second coating
protection layer 60 is disposed on the touch structure 10.
[0066] By disposing the second coating protection layer 60 on the
touch structure 10, the embodiment of the present disclosure may
serve the roles of blocking water and oxygen; protecting the bridge
13, the metal connecting bar 50 and the wiring 20.
[0067] For example, as shown in FIG. 7, an explosion-proof film 70
is disposed on the second coating protection layer 60.
[0068] The embodiment of the present disclosure provides the
explosion-proof film 70 on the second coating protection layer 60
and provides the explosion-proof film 70 in an entire layer, so as
to make the touch substrate 100 remain adhering to the
explosion-proof film 70 and be prevented from scattering everywhere
after broken. When the explosion-proof film 70 needs to be torn off
and re-formed due to dust between the explosion-proof film 70 and
the second coating protection layer 60 or other reasons, tearing
off the explosion-proof film 70 easily causes the separation
between the metal connecting bar 50 and the organic layer 40 as
well. The present disclosure solves the problem that the metal
connecting bar 50 is separated from the organic layer 40 due to
tearing off the explosion-proof film 70, by providing the metal
connecting bar 50 with a hollow portion.
[0069] An embodiment of the present disclosure further provides a
touch display device, which includes a display panel and a touch
substrate 100 as above described disposed on the light emitting
side of the display panel.
[0070] The touch display device may be a product or a component
having any display or touch function as a display, a television, a
mobile phone, a tablet computer, or the like.
[0071] The display panel and the touch substrate 100 can be
connected by OCR (Optical Clear Resin).
[0072] The embodiment of the present disclosure provides a touch
display device. By disposing a metal connecting bar 50 in a wiring
region 01 of the touch substrate 100 located on the light emitting
side of the display panel, so as to make a first touch electrode 11
as well as a second touch electrode 12 be electrically connected
with the wiring 20 through the metal connecting bar 50
respectively. A contact area between the wiring 20 and the first
touch electrode 11, and a contact area between the wiring 20 and
the second touch electrode 12 are accordingly increased, and thus
metal impedance is reduced, so touch sensitivity is improved.
[0073] When the metal connecting bar 50 is disposed on an organic
layer 40, the adhesion of the metal connecting bar 50 to the
organic layer 40 is small due to differences in material properties
between the metal connecting bar 50 and the organic layer 40. And
when the metal connecting bar 50 is formed on the organic layer 40,
a defect is easily formed between the organic layer 40 and the
metal connecting bar 50, and the adhesion at the defect position is
worse. In this way, when the touch substrate 100 needs rework, such
as analysis, disassembly, repair or the like, the metal connecting
bar 50 is to be subjected to a force in a tearing direction which
make the metal connecting bar 50 separated from the organic layer
40. As a result, the metal connecting bar 50 is separated from the
first touch electrode 11 or the second touch electrode 12, and thus
signals on the touch structure 10 are unable to be transmitted to
an IC, thereby affecting the touch function of a product and
reducing product yield. Based on this, by making the metal
connecting bar 50 have a hollow portion, the embodiment of the
present disclosure may reduce a contact area between the metal
connecting bar 50 and the organic layer 40, and thus reduce the
probability of forming defects, resulting in reducing the
probability of a separation between the metal connecting bar 50 and
the organic layer 40 and improving the product yield.
[0074] For example, the display panel is a liquid crystal display
panel or an organic light emitting diode display panel.
[0075] When the display panel is a liquid crystal display panel,
the display panel includes an array substrate, an alignment
substrate and a liquid crystal layer disposed therebetween. The
array substrate may include a TFT (Thin Film Transistor), and a
pixel electrode electrically connected to the drain electrode of
the TFT, and may further include a common electrode. The alignment
substrate may include a black matrix and a color filter. The color
filter may be disposed on the alignment substrate or on the array
substrate. The common electrode may be disposed on the array
substrate or on the alignment substrate.
[0076] When the display panel is an organic light emitting diode
(abbreviated as OLED) display panel, it includes an array substrate
and a package substrate. The array substrate may include a TFT, an
anode and a cathode electrically connected to the drain electrode
of the TFT, and an organic-material functional layer disposed
between the anode and the cathode.
[0077] The foregoing descriptions merely show specific
implementations of the present disclosure, but the protection scope
of the present disclosure is not limited thereto. Any person of
skill in the art can readily conceive of variations and
replacements within the technical scope disclosed by the
embodiments of the present disclosure, and these variations or
replacements shall fall into the protection scope of the present
disclosure. Therefore, the protection scope of the present
disclosure should be subject to the protection scope of the
claims.
[0078] The above descriptions merely show illustrative
implementations of the present disclosure, not intended to limit
the protection scope of the present disclosure. The protection
scope of the disclosure is determined by the appended claims.
[0079] This application claims the priority to Chinese Patent
Application No. 201610856232.6 filed on Sep. 27, 2016, the entire
disclosure of which is hereby incorporated by reference as part of
this application.
* * * * *