U.S. patent application number 15/491558 was filed with the patent office on 2018-10-25 for in-cell oled touch display panel structure with high touch detection sensitivity and narrow border.
The applicant listed for this patent is SuperC-Touch Corporation. Invention is credited to Shang CHIN, Hsiang-Yu LEE, Ping-Tsun LIN, Chia-Hsun TU.
Application Number | 20180307353 15/491558 |
Document ID | / |
Family ID | 63833141 |
Filed Date | 2018-10-25 |
United States Patent
Application |
20180307353 |
Kind Code |
A1 |
LEE; Hsiang-Yu ; et
al. |
October 25, 2018 |
IN-CELL OLED TOUCH DISPLAY PANEL STRUCTURE WITH HIGH TOUCH
DETECTION SENSITIVITY AND NARROW BORDER
Abstract
An in-cell OLED touch display panel structure includes a first
electrode layer and a second electrode layer. The first electrode
layer includes a plurality of first electrodes arranged along a
first direction, a plurality of isolation electrodes, and a
plurality of second electrode connection lines. The second
electrode layer includes a plurality of second electrodes arranged
along a second direction. Each of the second electrodes extends to
one edge of the in-cell OLED touch display panel structure through
a corresponding second electrode connection line. The first
electrode layer and the second electrode layer are both disposed at
one side of a common electrode layer opposite to an OLED layer.
Inventors: |
LEE; Hsiang-Yu; (New Taipei
City, TW) ; CHIN; Shang; (New Taipei City, TW)
; LIN; Ping-Tsun; (New Taipei City, TW) ; TU;
Chia-Hsun; (New Taipei City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SuperC-Touch Corporation |
New Taipei City |
|
TW |
|
|
Family ID: |
63833141 |
Appl. No.: |
15/491558 |
Filed: |
April 19, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G09G 2300/0426 20130101;
G06F 3/0416 20130101; G09G 3/3275 20130101; G09G 2310/0291
20130101; G06F 3/044 20130101; H01L 27/323 20130101; G06F 3/0412
20130101; G06F 2203/04112 20130101; G06F 3/0446 20190501; G06F
3/0445 20190501 |
International
Class: |
G06F 3/041 20060101
G06F003/041; G09G 3/3266 20060101 G09G003/3266; G09G 3/3275
20060101 G09G003/3275; G09G 3/3225 20060101 G09G003/3225; H01L
27/32 20060101 H01L027/32 |
Claims
1. An in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border, comprising: a thin film
transistor (TFT) substrate having a surface formed thereon a
plurality of display TFTs, a plurality of display pixel electrodes,
a plurality of gate lines, and a plurality of data lines; a common
electrode layer; an OLED layer disposed between the TFT substrate
and the common electrode layer; an encapsulation layer disposed at
one side of the common electrode layer opposite to the OLED layer;
a first electrode layer including a plurality of first electrodes
arranged along a first direction, a plurality of isolation
electrodes, and a plurality of second electrode connection lines;
and a second electrode layer including a plurality of second
electrodes arranged along a second direction, each of the second
electrodes extending to one edge of the in-cell OLED touch display
panel structure through a corresponding second electrode connection
line; wherein the first electrode layer and the second electrode
layer are both disposed at one side of the common electrode layer
opposite to the OLED layer.
2. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 1,
wherein the isolation electrode is arranged between one first
electrode and one second electrode connection line.
3. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 1,
further comprising: a touch control circuit for sequentially or
randomly coupling a touch stimulation signal to a selected second
electrode, receiving a touch sense signal from a selected first
electrode, coupling the touch sense signal to an in-phase amplifier
to generate an in-phase isolation signal, and coupling the in-phase
isolation signal to the isolation electrodes corresponding to the
selected first electrode for performing the touch detection
operation.
4. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 3,
wherein the touch control circuit couples the in-phase isolation
signal to the second electrodes exclusive of the selected second
electrode.
5. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 1,
further comprising: a display control circuit for sequentially
outputting a scan signal to one gate line, outputting data signals
to corresponding data lines, and outputting a zero voltage signal,
a negative voltage signal or a positive voltage signal to the
common electrode layer for performing a display operation.
6. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 1,
wherein the first electrodes and the second electrodes are each a
transparent conductive electrode.
7. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 1,
wherein the first electrodes or the second electrodes are each a
black metal mesh electrode.
8. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 1,
further comprising: a color filter layer disposed at one side of
the common electrode layer opposite to the OLED layer; and a black
matrix layer disposed at one side of the color filter layer
opposite to the OLED layer.
9. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 8,
wherein the first electrodes and the second electrodes are each a
metal mesh electrode formed by mesh lines, and the mesh lines of
the metal mesh electrodes are disposed at locations corresponding
to opaque lines of the black matrix layer.
10. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 1,
further comprising: an insulation layer disposed between the
plurality of first electrodes and the plurality of second
electrodes.
11. An in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border, comprising: a thin film
transistor (TFT) substrate having a surface formed thereon a
plurality of display TFTs, a plurality of display pixel electrodes,
a plurality of gate lines, and a plurality of data lines; a common
electrode layer; an OLED layer disposed between the TFT substrate
and the common electrode layer; an encapsulation layer disposed at
one side of the common electrode layer opposite to the OLED layer;
a first electrode layer including a plurality of first mesh
electrodes arranged along a first direction, a plurality of
isolation electrodes, and a plurality of second mesh electrode
connection lines; and a second electrode layer including a
plurality of second mesh electrodes arranged along a second
direction, each of the second mesh electrodes extending to one edge
of the in-cell OLED touch display panel structure through a
corresponding second mesh electrode connection line; wherein the
first electrode layer and the second electrode layer are both
disposed at one side of the common electrode layer opposite to the
OLED layer, and mesh lines of the first mesh electrodes and mesh
lines of the second mesh electrodes are dislocated and
non-overlapped with each other.
12. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 11,
wherein the isolation electrode is arranged between one first mesh
electrode and one second mesh electrode connection line.
13. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 11,
further comprising: a touch control circuit for sequentially or
randomly coupling a touch stimulation signal to a selected second
mesh electrode, receiving a touch sense signal from a selected
first mesh electrode, coupling the touch sense signal to an
in-phase amplifier to generate an in-phase isolation signal, and
coupling the in-phase isolation signal to the isolation electrodes
corresponding to the selected first mesh electrode for performing
the touch detection operation.
14. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 13,
wherein the touch control circuit couples the in-phase isolation
signal to the second mesh electrodes exclusive of the selected
second mesh electrode.
15. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 11,
further comprising: a display control circuit for sequentially
outputting a scan signal to one gate line, outputting data signals
to corresponding data lines, and outputting a zero voltage signal,
a negative voltage signal or a positive voltage signal to the
common electrode layer for performing a display operation.
16. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 11,
wherein the first mesh electrodes or the second mesh electrodes are
each a black metal electrode.
17. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 11,
further comprising: a color filter layer disposed at one side of
the common electrode layer opposite to the OLED layer; and a black
matrix layer disposed at one side of the color filter layer
opposite to the OLED layer.
18. The in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border as claimed in claim 17,
wherein the first mesh electrodes and the second mesh electrodes
are each a metal mesh electrode formed by mesh lines, and the mesh
lines of the metal mesh electrodes are disposed at locations
corresponding to opaque lines of the black matrix layer.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present disclosure relates to a structure of touch
display panel and, more particularly, to an in-cell OLED touch
display panel structure with high touch detection sensitivity and
narrow border.
2. Description of Related Art
[0002] In recent years, the flat panel display industry has been
rapidly developed, and many products have also been made in pursuit
of light weight, thinness, small volume and fine image quality, so
as to develop several types of flat panel displays to replace
traditional cathode ray tube display (CRT). The flat panel displays
are classified as liquid crystal display (LCD), plasma display
panel (PDP), organic light emitting diode (OLED) display, field
emission display (FED), and vacuum fluorescence display (VFD).
[0003] Among these types of flat panel displays, the organic light
emitting diode display (OLED) technology is the one with great
potential. The OLED display is provided with not only the
advantages of LCD display including thinness, power-saving and
full-color display, but also the features of wide viewing angle,
self-illumination, and fast response that are better than LCD.
[0004] Modern consumer electronic apparatuses are typically
equipped with touch panels for use as their input devices. With the
widespread use of smart phones, the multi-touch technique is
getting more and more important. Currently, the multi-touch is
generally implemented by projected capacitive touch technique.
[0005] FIG. 1 is a schematic diagram of a prior touch panel
structure 100. On this prior touch panel structure 100, the sensing
conductor lines 110, 120 are arranged in in the first direction
(X-direction) and second direction (Y-direction). When a touch
sensing is being performed and the sensing conductor lines 120 have
to receive the touch signals from the touch control circuit 131 on
a flexible circuit board 130, a great amount of wires at the side
of the panel 140 is required for connection to the flexible circuit
board 130. Such a prior design increases the border width of the
touch panel and thus is not suitable for the trend of narrow
border.
[0006] Therefore, it is desirable to provide an improved touch
display panel structure to mitigate and/or obviate the
aforementioned problems.
SUMMARY OF THE INVENTION
[0007] The object of the present invention is to provide an in-cell
OLED touch display panel structure with high touch detection
sensitivity and narrow border, which not only significantly
increases the touch detection accuracy but also greatly saves the
material cost and the manufacturing cost, and which is more
suitable for narrow border design than the prior art.
[0008] According to one aspect of the disclosure, an in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border is provided, which comprises a thin film
transistor (TFT) substrate, a common electrode layer, an OLED
layer, an encapsulation layer, a first electrode layer, and a
second electrode layer. The TFT substrate has a surface formed
thereon a plurality of display TFTs, a plurality of display pixel
electrodes, a plurality of gate lines, and a plurality of data
lines. The OLED layer is disposed between the TFT substrate and the
common electrode layer. The encapsulation layer is disposed at one
side of the common electrode layer opposite to the OLED layer. The
first electrode layer includes a plurality of first electrodes
arranged along a first direction, a plurality of isolation
electrodes, and a plurality of second electrode connection lines.
The second electrode layer includes a plurality of second
electrodes arranged along a second direction. Each of the second
electrodes extends to one edge of the in-cell OLED touch display
panel structure through a corresponding second electrode connection
line. The first electrode layer and the second electrode layer are
both disposed at one side of the common electrode layer opposite to
the OLED layer.
[0009] According to another aspect of the disclosure, an in-cell
OLED touch display panel structure with high touch detection
sensitivity and narrow border is provided, which comprises a thin
film transistor (TFT) substrate, a common electrode layer, an OLED
layer, an encapsulation layer, a first electrode layer, and a
second electrode layer. The TFT substrate has a surface formed
thereon a plurality of display TFTs, a plurality of display pixel
electrodes, a plurality of gate lines, and a plurality of data
lines. The OLED layer is disposed between the TFT substrate and the
common electrode layer. The encapsulation layer is disposed at one
side of the common electrode layer opposite to the OLED layer. The
first electrode layer includes a plurality of first mesh electrodes
arranged along a first direction, a plurality of isolation
electrodes, and a plurality of second mesh electrode connection
lines. The second electrode layer includes a plurality of second
mesh electrodes arranged along a second direction. Each of the
second mesh electrodes extends to one edge of the in-cell OLED
touch display panel structure through a corresponding second mesh
electrode connection line. The first electrode layer and the second
electrode layer are both disposed at one side of the common
electrode layer opposite to the OLED layer. The mesh lines of the
first mesh electrodes and mesh lines of the second mesh electrodes
are dislocated and non-overlapped with each other.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is a schematic diagram of a prior touch panel
structure;
[0011] FIG. 2 is a first stack-up diagram of the in-cell OLED touch
display panel structure with high touch detection sensitivity and
narrow border in accordance with the present disclosure;
[0012] FIG. 3 is a first schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure;
[0013] FIG. 4 is a second schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure;
[0014] FIG. 5 is a third schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure;
[0015] FIG. 6 is a fourth schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure;
[0016] FIG. 7 is a fifth schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure;
[0017] FIG. 8 is a sixth schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure;
[0018] FIG. 9 is a second stack-up diagram of the in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border in accordance with the present disclosure;
[0019] FIG. 10 is a third stack-up diagram of the in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border in accordance with the present disclosure;
[0020] FIG. 11 is a schematic view of the black matrix layer, first
electrode layer, second electrode layer and TFT substrate of the
in-cell OLED touch display panel structure in accordance with the
present disclosure;
[0021] FIG. 12 is a fourth stack-up diagram of the in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border in accordance with the present disclosure;
[0022] FIG. 13 is a fifth stack-up diagram of the in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border in accordance with the present disclosure;
and
[0023] FIG. 14 is a seventh schematic diagram of the first
electrode layer, second electrode layer and touch control circuit
of the in-cell OLED touch display panel structure in accordance
with the present disclosure.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0024] With reference to FIG. 2, there is shown a first stack-up
diagram of the in-cell OLED touch display panel structure with high
touch detection sensitivity and narrow border in accordance with
the present disclosure. As shown, the in-cell OLED touch display
panel structure 200 includes a thin film transistor (TFT) substrate
201, an OLED layer 203, a common electrode layer 205, an
encapsulation layer 207, a second electrode layer 209, an
insulation layer 211, a first electrode layer 213, a touch
protective layer 215, and a display control circuit 217.
[0025] The TFT substrate 201 has a surface formed thereon a
plurality of display TFTs, a plurality of display pixel electrodes,
a plurality of gate lines and a plurality of data lines (in which
the gate lines and data lines are well-known to those skilled in
the field of display devices and thus are only shown in FIG. 11
with numerals 1120 and 1130).
[0026] The OLED layer 203 is disposed between the TFT substrate 201
and the common electrode layer 205.
[0027] The encapsulation layer 207 is disposed at one side of the
common electrode layer 205 opposite to the OLED layer 203.
[0028] The second electrode layer 209 is disposed at one side of
the encapsulation layer 207 opposite to the OLED layer 203.
[0029] The first electrode layer 213 is disposed at one side of the
encapsulation layer 207 opposite to the OLED layer 203.
[0030] The insulation layer 211 is disposed between the first
electrode layer 213 and the second electrode layer 209.
[0031] The touch protective layer 215 is disposed at one side of
the encapsulation layer 207 opposite to the OLED layer 203.
[0032] The first electrode layer 213 and the second electrode layer
209 are both disposed at one side of the common electrode layer 205
opposite to the OLED layer 203.
[0033] The display control circuit 217 sequentially outputs a scan
signal to one gate line (not shown), outputs data signals to
corresponding data lines (not shown), and outputs a zero voltage
signal, a negative voltage signal or a positive voltage signal to
the common electrode layer 205 for performing a display operation,
and the plurality of pixel electrodes have polarity opposite to
that of the common electrode layer (i.e. if the pixel electrode is
anode, the common electrode layer is cathode; if the pixel
electrode is cathode, the common electrode layer is anode).
[0034] FIG. 3 is a first schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure. As shown in FIG. 3, the in-cell OLED touch
display panel structure 200 further includes a touch control
circuit 310. The first electrode layer 213 includes a plurality of
first electrodes 320 arranged along a first direction (X-axis
direction), a plurality of isolation electrodes 330, and a
plurality of second electrode connection lines 340.
[0035] The second electrode layer 209 includes a plurality of
second electrodes 350 arranged along a second direction (Y-axis
direction). Each of the second electrodes extends to one edge of
the in-cell OLED touch display panel structure 200 through a
corresponding second electrode connection line 340.
[0036] Each of the isolation electrode 330 and the second electrode
connection line 340 is a long strip metal line. The isolation
electrode 330 is arranged between one first electrode 320 and one
second electrode connection line 340 to prevent the first electrode
320 from being interfered by a touch stimulation signal VTX on the
second electrode connection line 340.
[0037] Each of the first electrodes 320 includes a plurality of
parallel metal lines to form a receiving electrode, and each of the
second electrodes 350 includes a plurality of parallel metal lines
to form a transmitting electrode. The second electrode 350 is
connected to the second electrode connection line 340 through the
vias 360.
[0038] The touch control circuit 310 sequentially or randomly
couples a touch stimulation signal VTX to a selected second
electrode 351 by the second electrode connection line 341, and
receives a touch sense signal VRX from a selected first electrode
321. The touch sense signal VRX is driven by an in-phase amplifier
311 to generate an in-phase isolation signal VR1, where the
in-phase amplifier 311 has a gain greater than 0. The in-phase
isolation signal VR1 is coupled to the isolation electrodes 331
corresponding to the selected first electrode 321 for performing
the touch detection operation.
[0039] Owing to the isolation electrode 331 being arranged between
the selected first electrode 321 and the second electrode
connection line 341, it can prevent the selected first electrode
321 from being interfered by a touch stimulation signal VTX on the
second electrode connection line 341. Thus, the touch detection
accuracy can be dramatically increased.
[0040] In the present disclosure, the touch control circuit 310
couples the touch stimulation signal VTX to a selected second
electrode 351. More specifically, the touch control circuit 310
directly outputs the touch stimulation signal VTX to the selected
second electrode 351, or the touch control circuit 310 outputs the
touch stimulation signal VTX through a passive component to the
selected second electrode 351, where the passive component can be a
resistor, a capacitor, or a inductor.
[0041] FIG. 4 is a second schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure. As shown in FIG. 4, the isolation electrodes
331 corresponding to the selected first electrode 321 are connected
to each other through a connection trace 410, and thus the number
of the in-phase amplifiers 311 can be reduced for saving the cost
of the touch control circuit 310.
[0042] FIG. 5 is a third schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure. As shown in FIG. 5, the second electrode
connection line 341 only extends to the corresponding second
electrode 351 rather than to the edge of the in-cell OLED touch
display panel structure 200 that is opposite to that edge provided
with the touch control circuit 310.
[0043] FIG. 6 is a fourth schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure, in which the touch control circuit 310 couples
the in-phase isolation signal VR1 to the second electrodes 350
exclusive of the selected second electrode 351.
[0044] As shown in FIG. 6, the touch stimulation signal VTX is
applied to node TX1 through a switch, and then to the selected
second electrode 351 through the second electrode connection line
341. The touch sense signal VRX from a selected first electrode 321
is sent to the in-phase amplifier 311 through the node RX1. The
touch sense signal VRX is driven by an in-phase amplifier 311 to
generate an in-phase isolation signal VR1, wherein the in-phase
amplifier 311 has a gain greater than 0. The in-phase isolation
signal VR1 is coupled to the isolation electrodes 331 corresponding
to the selected first electrode 321 for performing the touch
detection operation.
[0045] Moreover, the in-phase isolation signal VR1 is also sent to
a switch set 610 including a plurality of switches. In the switch
set 610, all switches are in an ON state except the switch
connected to node TX1. Thus, the in-phase isolation signal VR1 is
sent to the second electrodes 350, exclusive of the selected second
electrode 351, through the nodes TX2, TX3, . . . , TXn.
[0046] FIG. 7 is a fifth schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure, which is similar to FIG. 6 except that, in FIG.
7, each of the second electrodes 350 is a transparent conductive
electrode made of transparent material selected from the group
consisting of ITO, ZTO, IZO, conductive polymer, carbon nanotube,
graphene, and silver film with a thickness smaller than 50
nanometers.
[0047] FIG. 8 is a sixth schematic diagram of the first electrode
layer, second electrode layer and touch control circuit of the
in-cell OLED touch display panel structure in accordance with the
present disclosure, which is similar to FIG. 7 except that, in FIG.
8, the first electrodes 320, the isolation electrodes 330, and the
second electrode connection lines 340 are made of transparent
material selected from the group consisting of ITO, ZTO, IZO,
conductive polymer, carbon nanotube, graphene, and silver film with
a thickness smaller than 50 nanometers.
[0048] FIG. 9 is a second stack-up diagram of the in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border in accordance with the present disclosure, which
is similar to FIG. 2 except that, in FIG. 9, there are a color
filter layer 219, a black matrix layer 221 and a substrate disposed
between the touch protective layer 215 and the first electrode
layer 213. The color filter layer 219 is disposed at one side of
the common electrode layer 205 opposite to the OLED layer 203. The
black matrix layer 221 is disposed at one side of the color filter
layer 219 opposite to the OLED layer 203.
[0049] FIG. 10 is a third stack-up diagram of the in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border in accordance with the present disclosure, which
is similar to FIG. 9 except that, in FIG. 10, the second electrode
layer 209, the insulation layer 211 and the first electrode layer
213 are disposed between the color filter layer 219 and the black
matrix layer 221, and each of the first electrodes and the second
electrodes is a metal mesh electrode.
[0050] FIG. 11 is a schematic view of the black matrix layer, first
electrode layer, second electrode layer and the TFT substrate of
the in-cell OLED touch display panel structure, as shown by FIG.
10, in accordance with the present disclosure. As shown, the black
matrix layer 221 includes a plurality of opaque lines 1110 with
insulating material that are black and opaque. The opaque lines
1110 of black insulating material are arranged as a checkerboard
pattern. The locations of the opaque lines 1110 of black insulating
material are corresponding to the locations of the gate lines 1120
and data lines 1130. Thus, in viewing the touch display panel, a
user will not sense the existence of the gate lines 1120 and data
lines 1130.
[0051] Each of the first electrodes 320 and the second electrodes
350 is a metal mesh electrode formed by mesh lines 1140, and the
mesh lines 1140 of the first electrodes 320 and the second
electrodes 350 are disposed at locations corresponding to opaque
lines 1110 of the black matrix layer 221.
[0052] The mesh line 1140 is formed of conductive metal material
which is selected from the group consisting of chromium, barium,
aluminum, silver, copper, titanium, nickel, tantalum, cobalt,
tungsten, magnesium, calcium, potassium, lithium, indium, and an
alloy thereof.
[0053] FIG. 12 is a fourth stack-up diagram of the in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border in accordance with the present disclosure, which
is similar to FIG. 10 except that, in FIG. 12, the first electrode
layer is removed. The black matrix layer 221 includes a plurality
of opaque lines 1210 with black conductive material. The locations
of the opaque lines 1210 of black conductive material in the black
matrix layer 221 are corresponding to the locations of the gate
lines 1120 and data lines 1130 (as those shown by FIG. 11).
Corresponding to the second electrode layer 209, the opaque lines
1210 of black conductive material may be formed to be an electrode
layer in order to replace the first electrode layer 213.
[0054] FIG. 13 is a fifth stack-up diagram of the in-cell OLED
touch display panel structure with high touch detection sensitivity
and narrow border in accordance with the present disclosure, which
is similar to FIG. 10 except that, in FIG. 13, the second
electrodes (as shown by FIG. 7 with numerals 350) of the second
electrode layer 209 is a transparent conductive electrode made of
transparent material selected from the group consisting of ITO,
ZTO, IZO, conductive polymer, carbon nanotube, graphene, and silver
film with a thickness smaller than 50 nanometers.
[0055] FIG. 14 is a seventh schematic diagram of the first
electrode layer, second electrode layer and touch control circuit
in accordance with the present disclosure. With reference to both
FIG. 2, FIG. 10, FIG. 12 and FIG. 14, the in-cell OLED touch
display panel structure 200 includes a thin film transistor (TFT)
substrate 201, an OLED layer 203, a common electrode layer 205, an
encapsulation layer 207, a second electrode layer 209, an
insulation layer 211, a first electrode layer 213, a touch
protective layer 215, a display control circuit 217, and a touch
control circuit 310.
[0056] The TFT substrate 201 has a surface formed thereon a
plurality of display TFTs, a plurality of display pixel electrodes,
a plurality of gate lines 1120, and a plurality of data lines
1130.
[0057] The OLED layer 203 is disposed between the TFT substrate 201
and the common electrode layer 205.
[0058] The encapsulation layer 207 is disposed at one side of the
common electrode layer 205 opposite to the OLED layer 203.
[0059] The second electrode layer 209 is disposed at one side of
the encapsulation layer 207 opposite to the OLED layer 203.
[0060] The first electrode layer 213 is disposed at one side of the
encapsulation layer 207 opposite to the OLED layer 203.
[0061] The insulation layer 211 is disposed between the first
electrode layer 213 and the second electrode layer 209.
[0062] The touch protective layer 215 is disposed at one side of
the encapsulation layer 207 opposite to the OLED layer 203.
[0063] The display control circuit 217 sequentially outputs a scan
signal to one gate line (not shown), outputs data signals to
corresponding data lines (not shown), and outputs a zero voltage
signal, a negative voltage signal or a positive voltage signal to
the common electrode layer 205 for performing a display
operation.
[0064] The first electrode layer 213 includes a plurality of first
mesh electrodes 1420 arranged along a first direction (X-axis
direction), a plurality of isolation electrodes 1430, and a
plurality of second mesh electrode connection lines 1440.
[0065] The second electrode layer 209 includes a plurality of
second mesh electrodes 1450 arranged along a second direction
(Y-axis direction). Each of the second mesh electrodes 1450 extends
to one edge of the in-cell OLED touch display panel structure 200
through a corresponding second mesh electrode connection line
1440.
[0066] The first electrode layer 213 and the second electrode layer
209 are both disposed at one side of the common electrode layer 205
opposite to the OLED layer 203.
[0067] Each of the first mesh electrodes 1420 and the second mesh
electrodes 1450 is a black metal electrode. Alternatively, each of
the first mesh electrodes 1420 and the second mesh electrodes 1450
is a metal mesh electrode formed by mesh lines 1140, and the mesh
lines 1140 of the first mesh electrodes 1420 and the second mesh
electrodes 1450 are disposed at locations corresponding to opaque
lines (as shown by FIG. 11 with numerals 1110) of the black matrix
layer 221.
[0068] As shown in FIG. 14, the mesh lines of the first mesh
electrodes 1420 and mesh lines of the second mesh electrodes 1450
are dislocated and non-overlapped with each other. The isolation
electrode 1430 is arranged between one first mesh electrode 1420
and one second mesh electrode connection line 1440.
[0069] The touch control circuit 310 sequentially or randomly
couples a touch stimulation signal VTX to a selected second mesh
electrode 1451 by the second mesh electrode connection lines 1441,
and receives a touch sense signal VRX from a selected first mesh
electrode 1421. The touch sense signal VRX is driven by an in-phase
amplifier 311 to generate an in-phase isolation signal VR1, wherein
the in-phase amplifier 311 has a gain greater than 0. The in-phase
isolation signal VR1 is coupled to the isolation electrodes 1431
corresponding to the selected first mesh electrode 1421 for
performing the touch detection operation.
[0070] The touch control circuit 310 couples the in-phase isolation
signal VR1 to the second mesh electrodes 1450 exclusive of the
selected second mesh electrode 1451.
[0071] In view of the foregoing, it is known that the prior design
as in FIG. 1 shall increase the border width of the touch panel and
thus is not suitable for the trend of narrow border. According to
the in-cell OLED touch display panel structure with high touch
detection sensitivity and narrow border in accordance with the
present invention, the border of the OLED touch display panel
becomes narrower.
[0072] Owing to the isolation electrode 331 being arranged between
the selected first electrode 321 and the second electrode
connection line 341, it can prevent the selected first electrode
321 from being interfered by a touch stimulation signal VTX on the
second electrode connection line 341. Thus, the touch detection
accuracy can be dramatically increased.
[0073] The mesh lines of the first electrodes and the second
electrodes are disposed at locations corresponding to opaque lines
of the black matrix layer, and thus the present disclosure has a
better light penetration rate in comparison with the prior art.
[0074] Although the present invention has been explained in
relation to its preferred embodiment, it is to be understood that
many other possible modifications and variations can be made
without departing from the spirit and scope of the invention as
hereinafter claimed.
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