U.S. patent application number 12/781824 was filed with the patent office on 2011-06-16 for touch-sensing display panel and touch-sensing substrate.
This patent application is currently assigned to AU OPTRONICS CORPORATION. Invention is credited to Pei-Yu Chen, Jing-Tin Kuo.
Application Number | 20110141038 12/781824 |
Document ID | / |
Family ID | 44142359 |
Filed Date | 2011-06-16 |
United States Patent
Application |
20110141038 |
Kind Code |
A1 |
Kuo; Jing-Tin ; et
al. |
June 16, 2011 |
TOUCH-SENSING DISPLAY PANEL AND TOUCH-SENSING SUBSTRATE
Abstract
A touch-sensing display panel including a display panel and a
touch-sensing unit is provided. The touch-sensing unit includes a
plurality of first sensing series and a plurality of second sensing
series. The first sensing series are electrically insulated from
one another. Each first sensing series includes first touch pads
and first bridge lines. Two neighboring first touch pads disposed
on a same first sensing series are electrically connected with each
other through one of the first bridge lines. The second sensing
series are electrically insulated from one another. Each second
sensing series includes second touch pads and second bridge lines.
Two neighboring second touch pads disposed on a same second sensing
series are electrically connected with each other through two
second bridge lines which are at least 140 micrometers apart. A
touch-sensing substrate is also provided.
Inventors: |
Kuo; Jing-Tin; (Taipei City,
TW) ; Chen; Pei-Yu; (Miaoli County, TW) |
Assignee: |
AU OPTRONICS CORPORATION
Hsinchu
TW
|
Family ID: |
44142359 |
Appl. No.: |
12/781824 |
Filed: |
May 18, 2010 |
Current U.S.
Class: |
345/173 |
Current CPC
Class: |
G06F 3/0443 20190501;
G06F 2203/04111 20130101; G06F 3/0412 20130101; G06F 3/0446
20190501 |
Class at
Publication: |
345/173 |
International
Class: |
G06F 3/041 20060101
G06F003/041 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 10, 2009 |
TW |
98142326 |
Claims
1. A touch-sensing display panel, comprising: a display panel; a
touch-sensing unit disposed on the display panel, wherein the
touch-sensing unit comprises: a plurality of first sensing series
electrically insulated from one another, wherein each of the first
sensing series includes a plurality of first touch pads and a
plurality of first bridge lines, and two neighboring first touch
pads disposed on the same first sensing series are electrically
connected with each other through one of the first bridge lines;
and a plurality of second sensing series electrically insulated
from one another, wherein each of the second sensing series
includes a plurality of second touch pads and a plurality of second
bridge lines, and two neighboring second touch pads disposed on the
same second sensing series are electrically connected with each
other through at least two second bridge lines which are at least
140 micrometers apart.
2. The touch-sensing display panel of claim 1, wherein the
touch-sensing unit is disposed on an outer surface of the display
panel.
3. The touch-sensing display panel of claim 1 further comprising an
auxiliary substrate disposed between the touch-sensing unit and the
display panel.
4. The touch-sensing display panel of claim 1, wherein the
touch-sensing unit is built inside the display panel.
5. The touch-sensing display panel of claim 1, wherein the material
of the first touch pads is as same as the material of the first
bridge lines.
6. The touch-sensing display panel of claim 1, wherein the material
of the first touch pads and the material of the first bridge lines
include transparent conductive material.
7. The touch-sensing display panel of claim 1, wherein the material
of the first touch pads, the material of the first bridge lines and
the material of the second touch pads are the same.
8. The touch-sensing display panel of claim 1, wherein the material
of the first touch pads, the material of the first bridge lines and
the material of the second touch pads include transparent
conductive material and the material of the second bridge lines
includes metal.
9. The touch-sensing display panel of claim 1, wherein, in the same
second sensing series, at least two second bridge lines connected
to two neighboring second touch pads are about 400.about.600
micrometers apart.
10. The touch-sensing display panel of claim 1, wherein, in the
same second sensing series, at least two second bridge lines
connected to two neighboring second touch pads are about
600.about.3000 micrometers apart.
11. The touch-sensing display panel of claim 1, wherein, in the
same second sensing series, at least two second bridge lines
connected to two neighboring second touch pads are about
140.about.3000 micrometers apart.
12. The touch-sensing display panel of claim 1, wherein each of the
second touch pads has at least two branch portions and each of the
branch portions is connected with one of the second bridge lines
respectively.
13. The touch-sensing display panel of claim 12, wherein each of
the first touch pads has a plurality of openings and each of the
branch portions extends into one of the openings respectively.
14. The touch-sensing display panel of claim 13, wherein a gap is
disposed between each of the branch portions and the corresponding
first touch pad and the dimension of the gap is about 10.about.100
micrometers.
15. The touch-sensing display panel of claim 13, wherein the
touch-sensing unit further comprises a plurality of floating
conductive patterns disposed between the first sensing series and
the branch portions.
16. The touch-sensing display panel of claim 1, wherein the
touch-sensing unit further comprises a plurality of dielectric
patterns, and each of the dielectric patterns is disposed under one
of the second bridge lines respectively so that each of the second
bridge lines is electrically insulated from the first sensing
series.
17. The touch-sensing display panel of claim 1, wherein the
touch-sensing unit further comprises a plurality of floating
conductive patterns disposed between the first sensing series and
the second sensing series.
18. The touch-sensing display panel of claim 1, wherein, the
display panel comprises a plurality of sub-pixels arranged in an
array, and, in the same second sensing series, at least two first
bridge lines connected to two neighboring second touch pads are
arranged apart with a distance which is an integral multiple of the
length or the width of each of the sub-pixels.
19. A touch-sensing substrate, comprising: a substrate; a plurality
of first sensing series electrically insulated from one another,
wherein each of the first sensing series includes a plurality of
first touch pads and a plurality of first bridge lines, and two
neighboring first touch pads disposed on the same first sensing
series are electrically connected with each other through one of
the first bridge lines; and a plurality of second sensing series
electrically insulated from one another, wherein each of the second
sensing series includes a plurality of second touch pads and a
plurality of second bridge lines, and two neighboring second touch
pads disposed on the same second sensing series are electrically
connected with each other through at least two second bridge lines
which are at least 140 micrometers apart.
20. The touch-sensing substrate of claim 19, wherein the material
of the first touch pads is as same as the material of the first
bridge lines.
21. The touch-sensing substrate of claim 19, wherein the material
of the first touch pads and the material of the first bridge lines
include transparent conductive material.
22. The touch-sensing substrate of claim 19, wherein the material
of the first touch pads, the material of the first bridge lines and
the material of the second touch pads are the same.
23. The touch-sensing substrate of claim 19, wherein the material
of the first touch pads, the material of the first bridge lines and
the material of the second touch pads include transparent
conductive material and the material of the second bridge lines
includes metal.
24. The touch-sensing substrate of claim 19, wherein, in the same
second sensing series, at least two second bridge lines connected
to two neighboring second touch pads are about 400.about.600
micrometers apart.
25. The touch-sensing substrate of claim 19, wherein, in the same
second sensing series, at least two second bridge lines connected
to two neighboring second touch pads are about 600.about.3000
micrometers apart.
26. The touch-sensing substrate of claim 19, wherein, in the same
second sensing series, at least two second bridge lines is
connected to two neighboring second touch pads are about
140.about.3000 micrometers apart.
27. The touch-sensing substrate of claim 19, wherein each of the
second touch pads has at least two branch portions and each of the
branch portions connected with one of the second bridge lines
respectively.
28. The touch-sensing substrate of claim 27, wherein each of the
first touch pads has a plurality of openings and each of the branch
portions extends into one of the openings respectively.
29. The touch-sensing substrate of claim 28, wherein a gap is
disposed between each of the branch portions and the corresponding
first touch pad and the dimension of the gap is about 10.about.100
micrometers.
30. The touch-sensing substrate of claim 28, wherein the
touch-sensing unit further comprises a plurality of floating
conductive patterns disposed between the first sensing series and
the branch portions.
31. The touch-sensing substrate of claim 19, wherein the
touch-sensing unit further comprises a plurality of dielectric
patterns, and each of the dielectric patterns is disposed under one
of the second bridge lines respectively so that each of the second
bridge lines is electrically insulated from the first sensing
series.
32. The touch-sensing substrate of claim 19, wherein the
touch-sensing unit further comprises a plurality of floating
conductive patterns disposed between the first sensing series and
the second sensing series.
33. The touch-sensing substrate of claim 19, wherein the substrate
includes a color filter substrate, a thin film transistor array
substrate and an auxiliary substrate.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the priority benefit of Taiwan
application serial no. 98142326, filed on Dec. 10, 2009. The
entirety of the above-mentioned patent application is hereby
incorporated by reference herein and made a part of
specification.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a flat panel display. More
particularly, the present invention relates to a touch sensing
display panel.
[0004] 2. Description of Related Art
[0005] Based on different sensing types, a touch-sensing panel can
be generally categorized into a resistance touch-sensing panel, a
capacitive touch-sensing panel, an optical touch-sensing panel, an
acoustic-wave touch-sensing panel and an electromagnetic
touch-sensing panel. The capacitive touch sensing panel is
characterized by short response speed, favorable reliability,
satisfactory durability, and so on. Therefore, the capacitive
touch-sensing panel is widely used in the electronic products.
According to structural and manufacturing differences, the
capacitive touch sensing-panel can be further classified into an
Added-on type touch sensing panel and an On-cell/In-cell type
touch-sensing panel. In the process for manufacturing the Added-on
type capacitive touch-sensing panel, the sensing series are formed
on an auxiliary substrate, and then the auxiliary substrate having
the sensing series formed thereon is adhered to an outer surface of
a display. Apparently, the Added-on type touch-sensing panel
possesses a certain thickness. Comparing with the Added-on type
touch-sensing panel, the On-cell/In-cell type touch-sensing panel
is more favorable for the slimness and lightness of the
monitor.
[0006] Not only the On-cell/In-cell type touch-sensing panel but
also the Added-on touch-sensing panel confronts the problems of the
poor yield during the production or the decreasing of the yield due
to the electrostatic discharge. For instance, in the conventional
method for manufacturing the On-cell/In-cell touch-sensing panel,
the touch-sensing circuit is usually manufactured on one surface of
the substrate before the color filter thin film is formed on the
other surface of the substrate. At the time the color filter thin
film is formed, the touch-sensing circuit is easily broken due to
the poor yield during the production or is damaged due to the
electrostatic discharge. In addition, when the user's finger
touches the On-cell/In-cell type touch-sensing panel and the
Added-on touch-sensing panel, the electrostatic discharge possibly
happens and leads to the damage of the touch-sensing circuit.
[0007] In the conventional capacitive touch-sensing panel, the
metal bridge lines disposed on the crossover region, where the X
sensing series intersect the Y sensing series, are used to couple
the neighboring touch pads to each other to avoid the short circuit
happening on the X sensing series and the Y sensing series around
the crossover region. For instance, the two neighboring touch pads
in the X sensing series or the Y sensing series are electrically
connected to each other through a metal bridge line. When the
electrostatic discharge happens, the metal bridge line may possibly
fuse which leads to the X sensing series or the Y sensing series
cannot be operated normally. Hence, the conventional technique
(such as the technique disclosed in R.O.C. patent No. TW M344544)
provides a design in which the two neighboring touch pads are
electrically connected to each other through two parallel metal
bridge lines. The aforementioned design can improve the issue of
the decreasing of the yield due to the electrostatic discharge.
However, when the two metal bridge lines are too close to each
other, the visual effect is seriously affected.
SUMMARY OF THE INVENTION
[0008] The present invention provides a touch-sensing display panel
and a touch-sensing substrate with a better visual effect due to
the bridge line hard to be perceived by the user.
[0009] The present invention provides a touch-sensing display panel
including a display panel and a touch-sensing unit. The
touch-sensing unit is disposed on the display panel and the
touch-sensing unit comprises a plurality of first sensing series
and a plurality of second sensing series. The first sensing series
are electrically insulated from one another, and each of the first
sensing series includes a plurality of first touch pads and a
plurality of first bridge lines, and two neighboring first touch
pads disposed on the same first sensing series are electrically
connected with each other through one of the first bridge lines.
The second sensing series are electrically insulated from one
another, and each of the second sensing series includes a plurality
of second touch pads and a plurality of second bridge lines, and
two neighboring second touch pads disposed on the same second
sensing series are electrically connected with each other through
at least two second bridge lines which are at least 140 micrometers
apart.
[0010] The present invention provides a touch-sensing substrate
including a substrate, a plurality of first sensing series and a
plurality of second sensing series. The first sensing series are
electrically insulated from one another, and each of the first
sensing series includes a plurality of first touch pads and a
plurality of first bridge lines, and two neighboring first touch
pads disposed on the same first sensing series are electrically
connected with each other through one of the first bridge lines.
The second sensing series are electrically insulated from one
another, and each of the second sensing series includes a plurality
of second touch pads and a plurality of second bridge lines, and
two neighboring second touch pads disposed on the same second
sensing series are electrically connected with each other through
at least two second bridge lines which are at least 140 micrometers
apart.
[0011] In one embodiment of the present invention, the
aforementioned touch-sensing unit is disposed on an outer surface
of the display panel.
[0012] In one embodiment of the present invention, the
touch-sensing may further include an auxiliary substrate disposed
between the touch-sensing unit and the display panel.
[0013] In one embodiment of the present invention, the
aforementioned touch-sensing unit is built in the display
panel.
[0014] In one embodiment of the present invention, the material of
the first touch pads is as same as the material of the first bridge
lines.
[0015] In one embodiment of the present invention, the material of
the first touch pads and the material of the first bridge lines
include transparent conductive material.
[0016] In one embodiment of the present invention, the material of
the first touch pads, the material of the first bridge lines and
the material of the second touch pads are the same.
[0017] In one embodiment of the present invention, the material of
the first touch pads, the material of the first bridge lines and
the material of the second touch pads include transparent
conductive material and the material of the second bridge lines
includes metal.
[0018] In one embodiment of the present invention, in the same
second sensing series, at least two second bridge lines connected
to two neighboring second touch pads are about 400.about.600
micrometers apart.
[0019] In one embodiment of the present invention, in the same
second sensing series, at least two second bridge lines connected
to two neighboring second touch pads are about 600.about.3000
micrometers apart.
[0020] In one embodiment of the present invention, in the same
second sensing series, at least two second bridge lines connected
to two neighboring second touch pads are about 140.about.3000
micrometers apart.
[0021] In one embodiment of the present invention, each of the
second touch pads has at least two branch portions and each of the
branch portions is connected with one of the second bridge lines
respectively.
[0022] In one embodiment of the present invention, each of the
first touch pads has a plurality of openings and each of the branch
portions extends into one of the openings respectively.
[0023] In one embodiment of the present invention, a gap is
disposed between each of the branch portions and the corresponding
first touch pad and the dimension of the gap is about 10.about.100
micrometers.
[0024] In one embodiment of the present invention, the
touch-sensing unit further comprises a plurality of floating
conductive patterns disposed between the first sensing series and
the branch portions.
[0025] In one embodiment of the present invention, the
touch-sensing unit further comprises a plurality of dielectric
patterns, and each of the dielectric patterns is disposed under one
of the second bridge lines respectively so that each of the second
bridge lines is electrically insulated from the first sensing
series.
[0026] In one embodiment of the present invention, the
touch-sensing unit further comprises a plurality of floating
conductive patterns disposed between the first sensing series and
the second sensing series.
[0027] In one embodiment of the present invention, the display
panel comprises a plurality of sub-pixels arranged in an array,
and, in the same second sensing series, at least two first bridge
lines connected to two neighboring second touch pads are arranged
apart with a distance which is an integral multiple of the length
or the width of each of the sub-pixels.
[0028] Accordingly, since, in the same second sensing series, the
two neighboring second touch pads are connected to each other
through at least two second bridge lines which are at least 140
micrometers apart, the bridge lines in the touch-sensing display
panel and the touch-sensing substrate are hardly perceived by the
user and the visual effect is improved.
[0029] In order to make the aforementioned and other features and
advantages of the invention more comprehensible, embodiments
accompanying figures are described in detail below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0030] The accompanying drawings are included to provide a further
understanding of the invention, and are incorporated in and
constitute a part of this specification. The drawings illustrate
embodiments of the invention and, together with the description,
serve to explain the principles of the invention.
[0031] FIGS. 1A through 1C are schematic views showing various
touch-sensing display panels according to one embodiment of the
present invention.
[0032] FIGS. 2A through 2C are schematic top views showing
touch-sensing units in different embodiments of the present
invention.
[0033] FIG. 3 is a schematic top view showing a touch-sensing
display panel according to one embodiment of the present
invention.
DESCRIPTION OF EMBODIMENTS
[0034] FIGS. 1A through 1C are schematic views showing various
touch-sensing display panels according to one embodiment of the
present invention. As shown in FIG. 1A, a touch-sensing display
panel 100 of the present embodiment includes a display panel 110
and a touch-sensing unit 120 disposed on the display panel 110. In
the present embodiment, the touch-sensing unit 120 can be, for
example, built in the display panel 110. For instance, the display
panel 110 can be a liquid crystal display panel including a thin
film transistor (TFT) array substrate 112, a color filter substrate
114 and a liquid crystal layer 116 located between the TFT array
substrate 112 and the color filter substrate 114, and the
touch-sensing unit 120 is disposed on the inner surface of the
color filter substrate 114. In other words, the touch-sensing unit
120 is disposed between the color filter substrate 114 and the
liquid crystal layer 116, the design of which is the so-called
In-cell design. The display panel 110 can also be an organic light
emitting display panel, an electrophoretic display panel or a
plasma display panel.
[0035] The touch-sensing unit 120 not only can be built in the
display panel but also can be assembled with the display panel in
other manners such as those shown in FIG. 1B and FIG. 1C. As shown
in FIG. 1B, the touch-sensing unit 120 can be disposed on the outer
surface of the color filter substrate, the design of which is the
so-called On-cell design. Moreover, the touch-sensing unit 120 can
be formed on a substrate (e.g. the auxiliary substrate 130) and
then the substrate 130 having the touch-sensing unit 120 formed
thereon is adhered to the outer surface of the color filter
substrate 114 (as shown in FIG. 1C), the design of which is the
so-called Added-on design. It should be noticed that the substrate
130 (i.e. the auxiliary substrate 130) shown in FIG. 1C and the
touch-sensing unit 120 together form a touch-sensing substrate T of
the present embodiment. According to the description above, the
touch-sensing unit 120 of the present invention can be formed on
the color filter substrate 114, the thin film transistor array
substrate 112 or the auxiliary substrate 130, and the present
invention is not limited thereto.
[0036] A detailed description is provided hereinafter for various
types of the touch-sensing unit 120 in the present embodiment of
the invention.
[0037] FIGS. 2A through 1C are schematic top views showing
touch-sensing units in different embodiments of the present
invention. As shown in FIG. 2A, the touch-sensing unit 120 of the
present embodiment includes a plurality of first sensing series 122
and a plurality of second sensing series 124. The first sensing
series 122 are electrically insulated from one another, and each of
the first sensing series 122 includes a plurality of first touch
pads 122P serially connected together and a plurality of first
bridge lines 122B, and two neighboring first touch pads 122P
disposed on the same first sensing series 122 are electrically
connected with each other through one of the first bridge lines
122B. The second sensing series 124 are electrically insulated from
one another, and each of the second sensing series 124 includes a
plurality of second touch pads 124P serially connected together and
a plurality of second bridge lines 124B, and two neighboring second
touch pads 124P disposed on the same second sensing series 124 are
electrically connected with each other through at least two second
bridge lines 124B which are apart from each other by a distance P
at least 140 micrometers. The distance P between the at least two
second bridge lines 124B is larger than 140 micrometers and smaller
than 3000 micrometers. In the present embodiment, the
aforementioned distance P is about 400.about.600 micrometers.
Because the distance P is larger than 140 micrometers, the second
bridge lines 124B are hardly perceived and the visual effect is
improved.
[0038] As shown in FIG. 2A, each of the second touch pads 124P has
at least two branch portions 124BR, and each of the branch portions
124BR is connected to one of the second bridge lines 124B, and the
first bridge line 122B around the crossover region, where the first
sensing series 122 intersect the second sensing series 124
respectively, has a plurality of openings N1, and each of the
branch portions 124BR extends into one of the openings N1. In one
embodiment of the present invention, the material of the first
touch pads 122P is as same as the material of the first bridge
lines 122B. In other words, the first touch pads 122P and the first
bridge lines 122b belong to the same patterned thin film, and the
material of the first touch pads 122P and the material of the first
bridge lines 122B are the transparent conductive materials such as
indium-tin-oxide (ITO) or indium-zinc-oxide (IZO). In other
embodiments of the present invention, the material of the first
touch pads 122P, the material of the first bridge lines 122B and
the material of the second touch pads 124P can be the same. In
other words, the first touch pads 122P, the first bridge lines 122b
and the second touch pads 124P belong to the same patterned thin
film, and the material of the first touch pads 122P, the material
of the first bridge lines 122B and the material of the second touch
pads 124P are the transparent conductive materials such as
indium-tin-oxide (ITO) or indium-zinc-oxide (IZO). Furthermore, the
material of the second bridge lines 124B can be, for example,
metal.
[0039] In order to effectively avoid the short circuit happening on
the first sensing series 122 and the second sensing series 124, the
touch-sensing unit 120 of the present embodiment further comprises
a plurality of dielectric patterns 126, and each of the dielectric
patterns 126 is disposed under one of the second bridge lines 124B
respectively so that each of the second bridge lines 124B is
electrically insulated from the first sensing series 122.
Furthermore, in the present embodiment, the touch-sensing unit 120
further comprises a plurality of floating conductive patterns F
disposed between the first sensing series 122 and the branch
portions 124BR to improve the cross-talk phenomenon between the
first sensing series 122 and the branch portions 124BR. For
instance, there is a gap G1 disposed between each of the branch
portions 124BR and the corresponding first touch pad 122P, and the
dimension of the gap G1 is about 10.about.100 micrometers.
[0040] As shown in FIG. 2B and FIG. 2C, the touch-sensing units 120
shown in FIG. 2B and FIG. 2C respectively are similar to the
touch-sensing unit 120 shown in FIG. 2A. The major difference
therebetween is the distance P in the touch-sensing units shown in
FIG. 2B and FIG. 2C respectively is relatively larger and is about
600.about.3000 micrometers (as shown in FIG. 2B) or is about
2000.about.3000 micrometers (as shown in FIG. 2C).
[0041] As shown in FIG. 2B and FIG. 2C, in the present embodiment,
each of the second touch pads 124P has at least two branch portions
124BR' and each of the branch portions 124BR' is connected with one
of the second bridge lines 124B respectively. Moreover, each of the
first touch pads 122P has a plurality of openings N2 and each of
the branch portions 124BR' extends into one of the openings N2
respectively.
[0042] In order to effectively avoid the short circuit happening on
the first sensing series 122 and the second sensing series 124, the
touch-sensing unit 120 of the present embodiment further comprises
a plurality of dielectric patterns 126, and each of the dielectric
patterns 126 is disposed under one of the second bridge lines 124B
respectively so that each of the second bridge lines 124B is
electrically insulated from the first sensing series 122. Further,
in the present embodiment, the touch-sensing unit 120 further
comprises a plurality of floating conductive patterns F disposed
between the first sensing series 122 and the branch portions
124BR'. For instance, there is a gap G2 disposed between each of
the branch portions 124BR' and the corresponding first touch pad
122P, and the dimension of the gap G2 is about 10.about.100
micrometers.
[0043] FIG. 3 is a schematic top view showing a touch-sensing
display panel according to one embodiment of the present invention.
As shown in FIGS. 2A through 2C together with FIG. 3, the display
panel 100 of the present embodiment comprises a plurality of
sub-pixels SP arranged in an array, and, in the same second sensing
series 124, at least two first bridge lines 122B connected to two
neighboring second touch pads 124P are arranged apart with a
distance P which is an integral multiple of the length or the width
of each of the sub-pixels SP (as shown in FIG. 3). For instance,
the distance P can be, for example, an integral multiple of the
length of each of the sub-pixels SP.
[0044] Accordingly, since, in the same second sensing series, the
two neighboring second touch pads are connected to each other
through at least two second bridge lines which are at least 140
micrometers apart, the bridge lines in the touch-sensing display
panel and the touch-sensing substrate are hardly perceived by the
user and the visual effect is improved.
* * * * *