U.S. patent application number 15/654728 was filed with the patent office on 2017-11-02 for array substrate, color filter substrate, touch control display device and methods for driving the same.
The applicant listed for this patent is SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD, TIANMA MICRO-ELECTRONICS CO., LTD.. Invention is credited to Lingxiao DU, Baoling LIU, Jun MA, Qijun YAO.
Application Number | 20170315668 15/654728 |
Document ID | / |
Family ID | 51145004 |
Filed Date | 2017-11-02 |
United States Patent
Application |
20170315668 |
Kind Code |
A1 |
LIU; Baoling ; et
al. |
November 2, 2017 |
ARRAY SUBSTRATE, COLOR FILTER SUBSTRATE, TOUCH CONTROL DISPLAY
DEVICE AND METHODS FOR DRIVING THE SAME
Abstract
The disclosure provides an array substrate and a color filter
substrate of a capacitive touch control screen, a touch control
display device and a method for driving the touch control display
device, so as to achieve the self-capacitive multi-point touch. The
array substrate of the capacitive touch control screen includes: a
peripheral area and a display area; a plurality of pixel units with
pixel electrodes arranged in the display area; a plurality of touch
control electrodes; and touch control electrode lead wires
connected with a module configured to detect a touch control
signal, wherein each of the touch control electrodes is connected
respectively with one of the touch control electrode lead
wires.
Inventors: |
LIU; Baoling; (Shanghai,
CN) ; DU; Lingxiao; (Shanghai, CN) ; YAO;
Qijun; (Shanghai, CN) ; MA; Jun; (Xiamen,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD
TIANMA MICRO-ELECTRONICS CO., LTD. |
Shanghai
Shenzhen |
|
CN
CN |
|
|
Family ID: |
51145004 |
Appl. No.: |
15/654728 |
Filed: |
July 20, 2017 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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15296039 |
Oct 18, 2016 |
9746959 |
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15654728 |
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14281897 |
May 20, 2014 |
9507471 |
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15296039 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02F 1/136209 20130101;
G02F 2001/136222 20130101; G06F 3/0416 20130101; G06F 3/0443
20190501; G06F 2203/04111 20130101; G06F 3/0412 20130101; G06F
3/04166 20190501; G06F 3/044 20130101; G02F 1/1368 20130101 |
International
Class: |
G06F 3/041 20060101
G06F003/041; G06F 3/044 20060101 G06F003/044; G02F 1/1362 20060101
G02F001/1362; G06F 3/041 20060101 G06F003/041; G02F 1/1368 20060101
G02F001/1368 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 31, 2013 |
CN |
201310754202.0 |
Claims
1. An array substrate of a capacitive touch control screen,
comprising: a peripheral area and a display area; a plurality of
pixel units with pixel electrodes positioned in the display area; a
plurality of touch control electrodes positioned in the display
area, wherein the plurality of touch control electrodes are
arranged in M*N matrix, M being an integer larger than or equal to
3, N being an integer larger than or equal to 3; and a plurality of
touch control electrode lead wires connected with a module
configured to detect a touch control signal, wherein each of the
touch control electrodes is connected respectively with one of the
touch control electrode lead wires; and, wherein each of the touch
control electrodes and one of the touch control electrode lead
wires are connected to form a touch control unit.
2. The array substrate of the capacitive touch control screen
according to claim 1, further comprising a common electrode
positioned above or below the pixel electrodes, wherein the common
electrode acts as the touch control electrodes.
3. The array substrate of the capacitive touch control screen
according to claim 2, further comprising a first metal layer
electrically connected with the common electrode and positioned in
non-display areas between the pixel units.
4. The array substrate of the capacitive touch control screen
according to claim 3, wherein the touch control electrode lead
wires comprise the first metal layer or the common electrode, and
the touch control electrode lead wires are led out from two sides
or a single side of the peripheral area to the module configured to
detect the touch control signal.
5. The array substrate of the capacitive touch control screen
according to claim 3, wherein the touch control electrode lead
wires comprise the first metal layer or the common electrode, and
the touch control electrode lead wires are led out from the display
area to the module configured to detect the touch control
signal.
6. The array substrate of the capacitive touch control screen
according to claim 1, wherein the touch control electrode lead
wires comprise a gate metal layer or a source metal layer or a
drain metal layer, the plurality of touch control electrodes are
connected to the touch control electrode lead wires through via
holes in an edge area of the display area, and the touch control
electrode lead wires are led out from two sides or a single side of
the peripheral area to the module configured to detect the touch
control signal.
7. The array substrate of the capacitive touch control screen
according to claim 1, wherein the touch control electrodes receive
a touch control scanning signal concurrently, and the touch control
electrode lead wires are connected with the module configured to
detect the touch control signal to detect signals of the respective
touch control electrodes respectively.
8. The array substrate of the capacitive touch control screen
according to claim 1, wherein the touch control electrode is a
rectangle touch control electrode.
9. An array substrate of a capacitive touch control screen,
comprising: a peripheral area and a display area; a plurality of
pixel units with pixel electrodes positioned in the display area; a
plurality of touch control electrodes positioned in the display
area, wherein the plurality of touch control electrodes are
arranged in M*N matrix, M being an integer larger than or equal to
3, N being an integer larger than or equal to 3; and a plurality of
touch control electrode lead wires, wherein each of the touch
control electrodes is connected respectively with at least one of
the touch control electrode lead wires; and, wherein each of the
touch control electrodes and the at least one of the touch control
electrode lead wires are connected to form a touch control
unit.
10. The array substrate of the capacitive touch control screen
according to claim 9, further comprising a common electrode
positioned above or below the pixel electrodes, wherein the common
electrode acts as the touch control electrodes.
11. The array substrate of the capacitive touch control screen
according to claim 10, further comprising a first metal layer
electrically connected with the common electrode and positioned in
non-display areas between the pixel units.
12. The array substrate of the capacitive touch control screen
according to claim 11, wherein the touch control electrode lead
wires comprise the first metal layer or the common electrode, and
the touch control electrode lead wires are led out from two sides
or a single side of the peripheral area to a module configured to
detect a touch control signal.
13. The array substrate of the capacitive touch control screen
according to claim 11, wherein the touch control electrode lead
wires comprise the first metal layer or the common electrode, and
the touch control electrode lead wires are led out from the display
area to a module configured to detect a touch control signal.
14. The array substrate of the capacitive touch control screen
according to claim 9, wherein the touch control electrode lead
wires comprise a gate metal layer or a source metal layer or a
drain metal layer, the plurality of touch control electrodes are
connected to the touch control electrode lead wires through via
holes in an edge area of the display area, and the touch control
electrode lead wires are led out from two sides or a single side of
the peripheral area to a module configured to detect a touch
control signal.
15. The array substrate of the capacitive touch control screen
according to claim 9, wherein the touch control electrodes receive
a touch control scanning signal concurrently, and the touch control
electrode lead wires are connected with a module configured to
detect a touch control signal to detect signals of the respective
touch control electrodes respectively.
16. The array substrate of the capacitive touch control screen
according to claim 9, wherein the touch control electrode is a
rectangle touch control electrode.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] This application a continuation of U.S. patent application
Ser. No. 15/296,039, filed on Oct. 18, 2016, which is a
continuation of U.S. patent application Ser. No. 14/281,897 filed
on May 20, 2014, which application claims priority to Chinese
Patent Application No. 201310754202.0, entitled "ARRAY SUBSTRATE,
COLOR FILTER SUBSTRATE, TOUCH CONTROL DISPLAY DEVICE AND METHODS
FOR DRIVING THE SAME", filed with the State Intellectual Property
Office of People's Republic of China on Dec. 31, 2013, the content
of which is incorporated herein by reference in its entirety for
all purposes.
BACKGROUND
[0002] In the prior art, capacitive touch control technologies can
fall into self-capacitive and mutual-capacitive technologies as per
capacitance detection schemes and into in-cell, on-cell and
out-cell technologies as per the relative relationship between a
Thin Film Transistor (TFT) and a Color Filter (CF) substrate, where
the in-cell technology has become a significant development
direction of the touch control technologies due to its high
integration, thinness, superior performances and other advantages.
Various conventional systems and methods exist, but unfortunately
inadequate. New and improved systems and methods of capacitive
touch control are desired.
BRIEF DESCRIPTION OF THE DRAWINGS
[0003] FIG. 1 is a schematic structural diagram of a
mutual-capacitive design on the color filter substrate side in the
prior art;
[0004] FIG. 2 is a schematic diagram of an out-cell self-capacitive
design in the prior art;
[0005] FIG. 3 is a schematic diagram of ghost points appearing as a
result of a self-capacitive two-point touch in the prior art;
[0006] FIG. 4 is a schematic structural diagram of touch control
electrodes and touch control electrode lead wires in an array
substrate of a capacitive touch control screen according to an
embodiment of the invention;
[0007] FIG. 5 is an enlarged schematic diagram between two adjacent
touch control electrodes in an array substrate of a capacitive
touch control screen according to an embodiment of the
invention;
[0008] FIG. 6 is a schematic diagram of a common electrode and a
metal layer electrically connected with the common electrode in an
array substrate of a capacitive touch control screen according to
an embodiment of the invention;
[0009] FIG. 7 is a schematic connection diagram of touch control
electrode lead wires in an array substrate of a capacitive touch
control screen according to an embodiment of the invention;
[0010] FIG. 8 is another schematic connection diagram of touch
control electrode lead wires in an array substrate of a capacitive
touch control screen according to an embodiment of the
invention;
[0011] FIG. 9(a) is a schematic structural diagram of touch control
electrodes and touch control electrode lead wires in a color filter
substrate of a capacitive touch control screen according to an
embodiment of the invention;
[0012] FIG. 9(b) is a local enlarged diagram of the touch control
electrode at the area A in FIG. 9(a);
[0013] FIG. 10 is a schematic connection diagram of touch control
electrode lead wires in a color filter substrate of a capacitive
touch control screen according to an embodiment of the
invention;
[0014] FIG. 11 is another schematic connection diagram of touch
control electrode lead wires in a color filter substrate of a
capacitive touch control screen according to an embodiment of the
invention;
[0015] FIG. 12 is a schematic diagram of a channel of a color
filter substrate conductive electrode in a color filter substrate
of a capacitive touch control screen according to an embodiment of
the invention;
[0016] FIG. 13 is a schematic diagram of a square wave signal
inputted to a touch control display device in a touch control phase
according to an embodiment of the invention; and
[0017] FIG. 14 is an enlarged schematic diagram of a square wave
signal inputted to a touch control display device in a touch
control phase according to an embodiment of the invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] Embodiments of the invention provide an array substrate and
a color filter substrate of a capacitive touch control screen, a
touch control display device and a method for driving the touch
control display device, so as to achieve the self-capacitive
multi-point touch. There are other embodiments well.
[0019] As mentioned above, existing conventional systems and
methods are inadequate. Certain conventional systems and
inadequacies thereof are described in more detail below. The CF
side in-cell mutual-capacitive technology in the prior art is
illustrated in FIG. 1, where a CF substrate and an array substrate
are arranged in opposite. The array substrate includes a glass
substrate 21, a thin film transistor element layer 17 arranged on
the glass substrate 21, and a polarization sheet 20 on the outside
of the glass substrate 21. The CF substrate includes a glass
substrate 11, a Black Matrix (BM) 12 arranged on the glass
substrate 11, and a first metal layer 13 and a second metal layer
15 below the BM, where there is a color filter layer 14 between the
first metal layer 13 and the second metal layer 15, and the first
metal layer 13 and second metal layer 15 added on the CF substrate
side function as mutual-capacitive touch control traveling lines.
In order to lower interference to display signals, touch control
and display operations need to be performed separately, and it is
necessary to spare a sufficiently long period of time to perform
the touch control operation for a display Integrated Circuit (IC).
A time period required for a touch control operation in the general
mutual-capacitive scheme is proportional to the number of scanned
channels so that the larger a screen is, the larger the number of
channels will be, the longer the period of time required for the
touch control operation will be, and the shorter A time period
spared for a display scan operation will be, but the period of time
for the display scan operation can only be shorten finitely, and
consequently the screen size which can be supported in the existing
mutual-capacitive scheme is limited greatly.
[0020] General self-capacitive designs in the prior art are mostly
used for out-cell structures, and as illustrated in FIG. 2, there
is a triangular pattern design embodied by using a structurally
simple and highly sensitive single-layer pattern but incapable of a
multi-point touch control operation, for example, when there is a
two-point touch, only abscissas and ordinates of two points can be
given concurrently without differentiating the ordinates
corresponding to the respective abscissas. That is, ghost points
(i.e., black points shown in FIG. 3) appear when two points are
touched concurrently in the self-capacitive design in the prior
art, as illustrated in FIG. 3. The multi-point touch can not be
identified directly in the self-capacitive design in the prior art,
and algorithms have to be used to approach the effect of the
multi-point touch. When the self-capacitive design is directly
applied to the in-cell scheme, an overly large area of a capacitor
results in an overly high parasitic capacitance, to thereby form a
background value of an inductive capacitance, which is difficult to
be achieved.
[0021] In summary, the multi-point touch can not be achieved in the
self-capacitive design in the prior art.
[0022] Embodiments of the invention are described below in
detail.
[0023] As illustrated in FIG. 4, which is a schematic structural
diagram of touch control electrodes and touch control electrode
lead wires in an array substrate of a capacitive touch control
screen according to an embodiment of the invention, the array
substrate includes a peripheral area 42 and a display area 43. A
plurality of pixel units with pixel electrodes are positioned
within the display area 43. The array substrate also includes a
plurality of touch control electrodes 40 and touch control
electrode lead wires 41 connected with a module configured to
detect a touch control signal, where each touch control electrode
40 correspond to one or more of pixel units. Each touch control
electrode 40 is connected respectively with one touch control
electrode lead wire 41. The array substrate further includes a
common electrode arranged above the pixel electrodes, where the
common electrode acts as the touch control electrodes 40. In a
particular embodiment of the invention, the common electrode
comprises a transparent conductive layer, which is preferably made
of the Indium Tin Oxide (ITO) material.
[0024] Specifically for a liquid crystal display in the Fringe
Field Switching (FFS) mode, a gate layer, a semiconductor active
layer, a source layer, a drain layer, an insulation passivation
layer, pixel electrodes and a common electrode are fabricated in
that order on a substrate, where the respective layers of the FFS
liquid crystal display can be fabricated in the existing processes,
so the repeated description thereof will be omitted here. In this
embodiment, the common electrode is positioned above the pixel
electrodes and made of the transparent ITO material, and in a
particular embodiment of the invention, the pixel electrodes may
comprise of the transparent ITO material. As illustrated in FIG. 5,
the common electrode is separated out in the display area 43 and
divided into separate zones, each of which is one touch control
electrode 40 configured to detect a signal separately. All the
touch control electrodes 40 are led out through a plurality of
touch control electrode lead wires 41 and finally connected onto an
Integrated Circuit (IC) or a Flexible Printed Circuit (FPC) for
detection. The common electrode layer fabricated in this process is
at the top. Since the common electrode further provides a common
voltage to each pixel unit, the common electrode is broken between
adjacent pixel units 50 and 52 in the display area 43, such as a
gap 51 as illustrated, to thereby avoid influencing the normal
picture display due to reusing of the common electrode as the touch
control electrodes.
[0025] For an FFS design in another film layer architecture, a
common electrode can be similarly selected as touch control
electrodes, for example, in order to improve the optical
performance, an organic film layer can be added on the TFT side,
and in a typical process sequence, a gate layer, a semiconductor
active layer, a source layer, a drain layer, a silicon nitride
SiN.sub.X insulation layer, an organic film layer, a common
electrode layer, a silicon nitride SiN.sub.X insulation layer and a
pixel electrode layer are fabricated in that order on a substrate.
Similarly, the respective layers of the FFS design can be
fabricated using existing processes, so the repeated description
thereof will be omitted here. At this time, the common electrode is
arranged below pixel electrodes, and the common electrode can be
designed as shown in FIG. 5, where the common electrode is
segmented into separate patterns for both display and touch control
functions concurrently. The arrangement of the common electrode
below the pixel electrodes in this embodiment can lower the load
capacitance of the common electrode layer and facilitate an
improvement in touch control performances as compared with the
arrangement of the common electrode above the pixel electrodes in
the embodiments of FIG. 4 and FIG. 5. It is to be appreciated that
a load capacitance of the common mode electrode layer can lead to
improved performance.
[0026] According to a particular embodiment of the invention, the
array substrate of the capacitive touch control screen further
includes a first metal layer 60 electrically connected with a
common electrode 61 and arranged in a non-display area between
pixel units 63, as illustrated in FIG. 6. Since the common
electrode in the particular embodiment of the invention is made of
ITO with a higher square resistance, a metal layer can be added on
the ITO layer to lower the resistance of the common electrode
layer. Since the first metal layer 60 is opaque, the first metal
layer 60 only cover the non-display area between the pixel units
63. That is, the first metal layer 60 is arranged in a light
shielding area of a black matrix of a color filter substrate, so
that even though the first metal layer 60 is opaque, it will not
result in reducing the aperture ratio of the display device. As
illustrated in FIG. 6, the common electrode 61 includes a plurality
of branch electrodes. The common electrode forms a plurality of
slits 62 in the pixel unit area, and a horizontal electric field is
formed between the branch electrodes of the common electrode 61 and
the pixel electrodes and used to control rotations of liquid
crystal molecules to thereby achieve the purpose of displaying a
picture. In a particular embodiment of the invention, the first
metal layer electrically connected with the common electrode
comprises low-resistance material, e.g., molybdenum (Mo), aluminum
(Al), an alloy thereof and/or another metal material.
[0027] As illustrated in FIG. 7, according to a particular
embodiment of the invention, touch control electrode lead wires 411
of a part of touch control electrodes 401 in the array substrate of
the capacitive touch control screen are led out from a single side
of the peripheral area 42 of the array substrate to the module
configured to detect the touch control signal; and touch control
electrode lead wires 412 of a part of touch control electrodes 402
are led out from the display area 43 of the array substrate to the
module configured to detect the touch control signal. At this time,
the touch control electrode lead wires 41 are the first metal layer
or the common electrode layer. Of course, the touch control
electrode lead wires can also be led out from two sides of the
peripheral area of the array substrate to the module configured to
detect the touch control signal. The configuration where the touch
control electrodes are led out from two sides of the peripheral
area to the module configured to detect the touch control signal
can avoid both an overly wide single-side edge of the array
substrate and the short-circuiting problem due to overly dense
wirings on the single side, as compared to the configuration where
the touch control electrode lead wires are led out from the single
side of the peripheral area.
[0028] The touch control electrode lead wires can alternatively be
a gate metal layer or a source metal layer or a drain metal layer,
the plurality of touch control electrodes are connected to the
touch control electrode lead wires through via holes in an edge
area of the display area, and the touch control electrode lead
wires are led out from two sides or a single side of the peripheral
area of the array substrate to the module configured to detect the
touch control signal. All the touch control electrode lead wires
can be connected directly to an FPC or an IC outside the display
area.
[0029] As illustrated in FIG. 8, touch control electrode lead wires
413 of a part of touch control electrodes 403 in the array
substrate of the capacitive touch control screen are led out from
the display area 43 of the array substrate to the module configured
to detect the touch control signal. At this time, the touch control
electrode lead wires 41 are the first metal layer or the common
electrode layer. When the first metal layer is used as the touch
control electrode lead wires, the touch control electrode lead
wires can be arranged in the non-display area between adjacent
pixel units in the display area. That is, the touch control
electrode lead wires are arranged in the light shielding area of
the black matrix of the color filter substrate, so that even though
the first metal layer is opaque, it will not result in reducing the
aperture ratio of the display device.
[0030] Preferably the touch control electrodes receive a touch
control scanning signal concurrently, the touch control electrode
lead wires are connected with the module configured to detect the
touch control signal, and the module configured to detect the touch
control signal determines touch control locations according to
sensing signals of the touch control electrodes.
[0031] FIG. 9(a) is a schematic structural diagram of touch control
electrodes and touch control electrode lead wires in a color filter
substrate of a capacitive touch control screen according to an
embodiment of the invention. As illustrated in FIG. 9(a), the color
filter substrate of the capacitive touch control screen according
to the particular embodiment of the invention includes a black
matrix (not illustrated in this figure) and a color filter layer in
a black matrix area 92, and a peripheral area 94, wherein the color
filter substrate further includes a plurality of touch control
electrodes 90 and touch control electrode lead wires 91 connected
with a module configured to detect a touch control signal, where
the touch control electrodes 90 are located in the area 92 in which
the black matrix is located, and each touch control electrode 90 is
connected respectively with one touch control electrode lead wire
91. In this embodiment, the touch control electrode lead wires 91
are led out from two sides of the peripheral area 94 onto color
filter substrate conductive electrodes (not illustrated in this
figure) preset on the color filter substrate side. FIG. 9(b) is an
enlarged diagram of a touch control electrode 90 at the area A in
FIG. 9(a). As illustrated in FIG. 9(b), the color filter layer 93
includes red color resistors R, green color resistors G and blue
color resistors B, and the touch control electrode 90 corresponds
to pixel units corresponding to a plurality of color resistors 93.
Since the touch control electrode 90 is an opaque conductive layer,
the touch control electrode 90 is located only in the area where
the black matrix is located. That is, the touch control electrode
90 is structured as a grid hollowed at the locations of the color
filter layer corresponding to the red color resistors R, the green
color resistors G and the blue color resistors B. Each touch
control electrode 90 is connected respectively with one touch
control electrode lead wire 91, and the touch control electrode
lead wires 91 are also located only in the area where the black
matrix is located. That is, the touch control electrode lead wires
91 are also structured as a grid hollowed at the corresponding
locations of the color filter layer. The touch control electrodes
90 and the touch control electrode lead wires 91 are arranged
overlapping with the black matrix. The widths of the touch control
electrodes 90 and the touch control electrode lead wires 91 are
configured to be smaller than or equal to the width of the black
matrix to thereby avoid influencing the display transmittance due
to the arrangement of the opaque touch control electrodes 90 and
touch control electrode lead wires 91.
[0032] According to a particular embodiment of the invention, the
color filter substrate of the capacitive touch control screen
further includes a first metal layer arranged on the black matrix,
where the first metal layer acts as the touch control electrodes
90. When the display is a liquid crystal display in the Twisted
Nematic (TN) mode, the touch control electrodes 90 are configured
as a common electrode, and in a particular embodiment of the
invention, the common electrode is made of the ITO material which
is a transparent conductive layer. In this configuration, the
common electrode can be located at the color filter layer instead
of being located in the black matrix area 92, and the common
electrode can simply be divided into separate zones, each of which
is used as one touch control electrode 90. Since a square
resistance of the ITO is higher, a metal layer can be added on the
ITO to lower the resistance of the common electrode. In a
particular embodiment of the invention, a second metal layer is
arranged to be electrically connected with the common electrode
ITO, and as illustrated in FIG. 9(b), the second metal layer faces
the black matrix area 92, and the second metal layer is made of a
low-resistance material, e.g., molybdenum (Mo), aluminum (Al), an
alloy thereof or another metal material.
[0033] As illustrated in FIG. 10, according to a particular
embodiment of the invention, the touch control electrode lead wires
91 of the touch control electrodes 90 in the color filter substrate
of the capacitive touch control screen are led out from the black
matrix area onto color filter substrate conductive electrodes 101
preset on the color filter substrate side, where the color filter
substrate conductive electrodes 101 are configured to receive the
touch control signal, and at this time, the touch control electrode
lead wires 91 can be the first metal layer.
[0034] As illustrated in FIG. 11, the touch control electrode lead
wires 91 of the touch control electrodes 90 in the color filter
substrate of the capacitive touch control screen are led out from
two sides of the peripheral area onto the color filter substrate
conductive electrodes 101 preset on the color filter substrate
side. In this configuration, the touch control electrode lead wires
91 can be the first metal layer. The manner that the touch control
electrode lead wires 91 are led out from two sides of the
peripheral area onto the color filter substrate conductive
electrodes 101 preset on the color filter substrate side can avoid
both an overly wide single-side edge of the color filter substrate
and the short-circuiting problem due to overly dense wirings on the
single side, as compared with the manner that the touch control
electrode lead wires 91 are led out from the single side of the
peripheral area.
[0035] The above embodiment is just one example, and the touch
control electrode lead wires can alternatively be led out from a
single side of the peripheral area onto the color filter substrate
conductive electrodes preset on the color filter substrate side; or
a part of the touch control electrode lead wires are led out from
the black matrix area onto the color filter substrate conductive
electrodes preset on the color filter substrate side, and a part of
the touch control electrode lead wires are led out from two sides
or a single side of the peripheral area onto the color filter
substrate conductive electrodes preset on the color filter
substrate side.
[0036] According to a particular embodiment of the invention, when
the touch control electrode lead wires in the color filter
substrate of the capacitive touch control screen are the common
electrode layer, the touch control electrode lead wires are led out
from the black matrix area or from two sides or a single side of
the peripheral area onto the color filter substrate conductive
electrodes preset on the color filter substrate side, where the
color filter substrate conductive electrodes are configured to
receive the touch control signal. According to a particular
embodiment of the invention, when the touch control electrode lead
wires in the color filter substrate of the capacitive touch control
screen are configured as the common electrode layer, a part of the
touch control electrode lead wires are led out from the black
matrix area onto the color filter substrate conductive electrodes
preset on the color filter substrate side, and a part of the touch
control electrode lead wires are led out from two sides or a single
side of the peripheral area onto the color filter substrate
conductive electrodes preset on the color filter substrate side,
where the color filter substrate conductive electrodes are
configured to receive the touch control signal.
[0037] According to a particular embodiment of the invention, when
the touch control electrode lead wires in the color filter
substrate of the capacitive touch control screen are the second
metal layer, the touch control electrode lead wires are led out
from the black matrix area or from two sides or a single side of
the peripheral area onto the color filter substrate conductive
electrodes preset on the color filter substrate side, where the
color filter substrate conductive electrodes are configured to
receive the touch control signal. According to a particular
embodiment of the invention, when the touch control electrode lead
wires in the color filter substrate of the capacitive touch control
screen are the second metal layer, a part of the touch control
electrode lead wires are led out from the black matrix area onto
the color filter substrate conductive electrodes preset on the
color filter substrate side, and a part of the touch control
electrode lead wires are led out from two sides or a single side of
the peripheral area onto the color filter substrate conductive
electrodes preset on the color filter substrate side, where the
color filter substrate conductive electrodes are configured to
receive the touch control signal.
[0038] Particularly the color filter substrate conductive
electrodes receive the touch control signal via a channel.
[0039] As illustrated in FIG. 12, when the channel is located on
the color filter substrate side, the channel is implemented as a
touch control flexible circuit board 121 laminated together with
the color filter substrate conductive electrodes 101, where the
touch control flexible circuit board 121 is integrated with a touch
control IC 122.
[0040] When the channel is located on the array substrate side, the
color filter substrate conductive electrodes are connected with
array substrate conductive electrodes through conductive metal
balls, and the array substrate conductive electrodes are connected
with a display flexible circuit board, where the display flexible
circuit board is integrated with a first IC for display operations
and a second IC for touch control operations; or the color filter
substrate conductive electrodes are connected with array substrate
conductive electrodes through conductive metal balls, and the array
substrate conductive electrodes are connected with a display
flexible circuit board, where the display flexible circuit board is
integrated with a third IC for both display and touch control
operations.
[0041] Preferably the touch control electrodes receive a touch
control scanning signal concurrently, and the touch control
electrode lead wires and the color filter substrate conductive
electrodes are connected with the module configured to detect the
touch control signal through channels to detect signals of the
respective touch control electrodes respectively.
[0042] A particular embodiment of the invention further provides a
touch control display device, which includes the array substrate
described above and/or the color filter substrate described above.
A method for driving the touch control display device includes: all
the touch control electrodes receiving a touch control scanning
signal and also receiving feedback signals through touch the
control electrode lead wires connected with the respective touch
control electrodes in a touch control phase of the display device,
where the touch control electrode lead wires are connected with a
module configured to detect a touch control signal to detect
signals of the respective touch control electrodes.
[0043] In the traditional display scheme, the display scan
frequency is 60 Hz and the period of time of one frame is 16.67 ms.
There is a scan-free interval of time after one frame is scanned
and data signals are inputted, and a time division drive function
of an integrated touch screen can be achieved in this interval of
time. In a particular embodiment of the invention, display and
touch control operations can be performed separately as per the
timing of the time division drive, and as illustrated in FIG. 13, A
time period per frame is divided into a display period of time t1
and a touch period of time t2. All of touch control units drive and
receive a touch control signal concurrently in the touch period of
time t2, a drive circuit inputs a multi-cycle square wave signal to
a touch control electrode n and a touch control electrode m
concurrently in the touch period of time t2, and the enlarged
diagram of the signal is illustrated in FIG. 14 in which each touch
control cycle includes a charging period of time T1 and a
discharging period of time T2. During charging, touch control
electrode lead wires receive a drive signal and then input the
drive signal to the touch control electrodes to charge the touch
control electrodes. That is, all the touch control electrodes
receive the touch control drive signal concurrently; and during
discharging, sensing signals are outputted through the touch
control electrode lead wires connected with the touch control
electrodes, and whether there is a touch can be judged by
calculating the amount of discharge. That is, the touch control
electrodes output the sensing signals concurrently, where the touch
control electrode lead wires connected with the respective touch
control electrodes are connected with a module configured to detect
a touch control signal, and the module configured to detect the
touch control signal determines touch control locations according
to the sensing signals of the touch control electrodes. Since all
the touch control elements have lead wires, changes in
self-capacitance of all the touch control electrodes can be
detected concurrently during only one scan in the touch control
period of time to thereby shorten effectively the period of time
for the touch control operations and also achieve the
self-capacitive multi-point touch. The touch control electrodes are
connected with a specific voltage, e.g., a common electrode
voltage, in the display period of time, to thereby avoid
influencing the display effect. Larger screens in size can be
supported in the technical solutions according to the particular
embodiments of the invention, as compared with the conventional
in-cell touch control scheme.
[0044] It is to be appreciated that there the present invention has
many implementations and embodiments. An embodiment of the
invention provides an array substrate of a capacitive touch control
screen, which includes: a peripheral area and a display area; a
plurality of pixel units with pixel electrodes arranged in the
display area; a plurality of touch control electrodes; and touch
control electrode lead wires connected with a module configured to
detect a touch control signal, wherein each of the touch control
electrodes is connected respectively with one of the touch control
electrode lead wires.
[0045] An embodiment of the invention further provides a color
filter substrate of a capacitive touch control screen, which
includes a black matrix, a color filter layer and a peripheral
area, wherein the color filter substrate further comprises a
plurality of touch control electrodes and touch control electrode
lead wires connected with a module configured to detect a touch
control signal, wherein the touch control electrodes are located in
an area of the black matrix, and each of the touch control
electrodes is connected respectively with one of the touch control
electrode lead wires.
[0046] An embodiment of the invention further provides a touch
control display device which includes the array substrate of the
capacitive touch control screen and/or the color filter substrate
of the capacitive touch control screen described above.
[0047] An embodiment of the invention further provides a method for
driving the touch control display device described above, which
includes:
[0048] the touch control electrodes receiving a touch control drive
signal and the touch control electrodes outputting sensing signals
in a touch control phase of the display device, wherein the touch
control electrode lead wires connected with the respective touch
control electrodes are connected with the module configured to
detect the touch control signal, and the module configured to
detect the touch control signal determines touch control locations
according to the sensing signals of the touch control
electrodes.
[0049] Based upon the array substrate and color filter substrate of
the capacitive touch control screen, the touch control display
device and the method for driving the touch control display device
according to the invention, the array substrate includes a
plurality of touch control electrodes and touch control electrode
lead wires connected with a module configured to detect a touch
control signal, where each of the touch control electrodes is
connected respectively with one of the touch control electrode lead
wires; the color filter substrate includes a plurality of touch
control electrodes and touch control electrode lead wires connected
with a module configured to detect a touch control signal, where
the touch control electrodes are located in the area of the black
matrix, and each of the touch control electrodes is connected
respectively with one of the touch control electrode lead wires;
and the touch control display device includes the array substrate
of the capacitive touch control screen and/or the color filter
substrate of the capacitive touch control screen described above.
Instead of the manner of scanning in rows and columns, a manner
that there is a separate lead wire for each touch control unit
composed of each touch control electrode and one touch control
electrode lead wire connected therewith is used, so this kind of
self-capacitive design does not have the problem of ghost points,
and can achieve the multi-point touch control and also have high
sensitivity in self-capacitive applications.
[0050] It is to be appreciated that there are other embodiments as
well. Evidently those skilled in the art can make various
modifications and variations to the invention without departing
from the spirit and scope of the invention. Thus the invention is
also intended to encompass these modifications and variations
thereto so long as these modifications and variations come into the
scope of the claims appended to the invention and their
equivalents.
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