CN106648258B - Array substrate, touch display panel and touch display device - Google Patents

Array substrate, touch display panel and touch display device Download PDF

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Publication number
CN106648258B
CN106648258B CN201710003653.9A CN201710003653A CN106648258B CN 106648258 B CN106648258 B CN 106648258B CN 201710003653 A CN201710003653 A CN 201710003653A CN 106648258 B CN106648258 B CN 106648258B
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China
Prior art keywords
layer
display panel
array
touch display
substrate
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CN201710003653.9A
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CN106648258A (en
Inventor
霍培荣
方业周
钟德龙
孙世成
崔辛超
崔学俊
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BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
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BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
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Priority to CN201710003653.9A priority Critical patent/CN106648258B/en
Publication of CN106648258A publication Critical patent/CN106648258A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Abstract

The embodiment of the invention provides an array substrate, a touch display panel and a touch display device, relates to the technical field of touch display, and can solve the problem that a self-capacitance touch display panel is easy to generate poor ghost points in the installation process. The array circuit board comprises a substrate base plate, an array circuit layer and a conducting layer, wherein the array circuit layer is arranged on the substrate base plate, the conducting layer is arranged on the substrate base plate and is positioned on the outer side of the array circuit layer, the conducting layer is grounded, and the conducting layer is not communicated with the array circuit layer. The conductive layer is arranged on the outer side of the array circuit layer on the substrate and grounded, and the conductive layer is not communicated with the array circuit layer, so that a shielding layer can be formed through the grounded conductive layer, interference signals possibly generated between the back of the touch display panel and the flexible circuit board in the installation process are shielded, and the stability of signal identification of the array substrate in the installation process is improved.

Description

Array substrate, touch display panel and touch display device
Technical Field
The invention relates to the technical field of touch display, in particular to an array substrate, a touch display panel and a touch display device.
Background
With the rapid development of display technology, Touch panels (Touch Screen panels) have become more and more widespread throughout people's lives due to the advantages of their combination of Touch functions and display functions. The touch panel is divided according to the working principle of touch operation, and more commonly includes a resistive touch panel, a capacitive touch panel, an optical touch panel, and the like. Among them, the capacitive touch panel is widely used in the industry because it can realize real multi-point control and high sensitivity.
The capacitive touch panel can be divided into two types, namely a self-capacitance touch panel and a mutual capacitance touch panel. The self-capacitance touch panel is manufactured by using ITO (Indium Tin Oxides) on the surface of a substrate to form a transverse and longitudinal electrode array, and the transverse and longitudinal electrodes respectively form a capacitance with ground, which is known as a self-capacitance, that is, a capacitance of an electrode to ground. When a finger touches the capacitive touch panel, the capacitance of the finger is superposed on the capacitance of the screen body, so that the capacitance of the screen body is increased. During touch detection, the self-capacitance touch panel sequentially and respectively detects the transverse electrode array and the longitudinal electrode array, respectively determines a transverse coordinate and a longitudinal coordinate according to the capacitance change before and after touch, and then combines the transverse coordinate and the longitudinal coordinate into a planar touch coordinate. The scanning mode of the self-capacitance is equivalent to projecting touch points on the touch panel to the X-axis direction and the Y-axis direction respectively, then calculating coordinates in the X-axis direction and the Y-axis direction respectively, and finally combining the coordinates into the coordinates of the touch points.
Compared with a mutual capacitance touch panel, the self-capacitance touch panel has the advantages of simple structure, low power consumption and low cost, but because the self-capacitance touch panel utilizes the earth capacitance of a single electrode, the self-capacitance touch panel is easily influenced by the change of the earth capacitance, especially in the whole installation process of the touch panel, once an FPC (Flexible Printed Circuit) attached to the back surface of a backlight module deforms, an interference signal is possibly generated at the position where the deformation position occurs, and the generated interference signal can be mistakenly identified as the touch signal by a touch electrode layer, so that the problem of bad ghost points on the touch panel is caused.
Disclosure of Invention
The embodiment of the invention provides an array substrate, a touch display panel and a touch display device, which can solve the problem that ghost points are easily generated in the installation process of a self-capacitance touch display panel.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect of the embodiments of the present invention, an array substrate is provided, which includes a substrate and an array circuit layer disposed on the substrate, and further includes: the conducting layer is arranged on the substrate and is positioned on the outer side of the array circuit layer, the conducting layer is grounded, and the conducting layer is not communicated with the array circuit layer.
Preferably, the conductive layer is disposed between the substrate base plate and the array circuit layer.
Furthermore, the conducting layer covers the surface of the substrate.
Furthermore, the array substrate also comprises a grounding part of the non-display area positioned at the inner side of the array circuit layer, and the conducting layer is connected with the grounding part.
Optionally, the grounding portion is a point and is provided with at least one, and each grounding portion is connected with the conductive layer.
Preferably, the grounding part is a strip-shaped conductive line extending along the edge of the array substrate.
Furthermore, a plurality of through holes or strip-shaped through grooves penetrating through the array circuit layer are arranged between the grounding part and the conducting layer, and the extending direction of the strip-shaped through grooves is the same as the extending direction of the strip-shaped conducting wires.
Preferably, the material of the conductive layer is a transparent conductive material.
In another aspect of the embodiments of the present invention, a touch display panel is provided, including: the display panel comprises the array substrate and a touch electrode layer, wherein the display panel comprises the array substrate.
In another aspect of the present invention, a touch display device is provided, which includes the touch display panel and a circuit board disposed on a back surface of the touch display panel.
The embodiment of the invention provides an array substrate, a touch display panel and a touch display device, which comprise a substrate, an array circuit layer arranged on the substrate and a conducting layer arranged on the substrate, wherein the conducting layer is positioned at the outer side of the array circuit layer and is grounded, and the conducting layer is not communicated with the array circuit layer. The conductive layer is arranged on the outer side of the array circuit layer on the substrate and grounded, and the conductive layer is not communicated with the array circuit layer, so that a shielding layer can be formed through the grounded conductive layer, interference signals possibly generated between the back of the touch display panel and the flexible circuit board in the installation process are shielded, and the stability of signal identification of the array substrate in the installation process is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an array substrate according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another array substrate according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an array substrate provided with a grounding portion according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a grounding portion connected to a conductive layer through a via hole on an array substrate according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an array substrate with a point-shaped grounding portion according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
fig. 7 is a schematic structural diagram of a grounding portion of an array substrate according to an embodiment of the present invention being a strip-shaped conductive line;
FIG. 8 is a cross-sectional view B-B of FIG. 7;
FIG. 9 is another view of the cross-sectional view B-B of FIG. 7;
fig. 10 is a schematic structural diagram of an arrangement manner of the grounding portion on the array substrate being a strip-shaped conductive line according to an embodiment of the present invention.
Reference numerals:
10-a substrate base plate; 20-an array circuit layer; 30-a conductive layer; 40-a ground part; a-a via hole; b-strip-shaped through grooves; x-non-display area.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides an array substrate, as shown in fig. 1, including a substrate 10 and an array circuit layer 20 disposed on the substrate 10, further including: the conductive layer 30 is disposed on the substrate 10, the conductive layer 30 is located outside the array circuit layer 20, and the conductive layer 30 is grounded, wherein the conductive layer 30 is not connected to the array circuit layer 20.
First, the array circuit layer 20 is a multi-layer structure formed on the substrate 10 for implementing the array circuit function, and is a driving circuit layer on a conventional array substrate, wherein the multi-layer structure at least includes a hierarchical structure of gate lines, data lines, thin film transistors and the like, which are arranged in a crossing manner, and the hierarchical structure is collectively referred to as the array circuit layer 20 herein.
The array substrate can be applied to a liquid crystal display device, and the array circuit layer 20 may further include a pixel electrode connected to a drain electrode of the thin film transistor. The liquid crystal display device may be of an ADS (Advanced-Super-Dimensional Switching) type, an IPS (In Plane Switching) type, a TN (Twist Nematic) type, or the like. Here, the array circuit layer 20 may further include a common electrode for the array substrate in the IPS-type or TN-type liquid crystal display device. Of course, the array circuit layer 20 may further include an insulating layer that is necessary to isolate different signals transmitted in the array circuit layer, for example, a gate insulating layer that isolates the gate electrode of the thin film transistor from the active layer.
The array substrate can be applied to an OLED (Organic Light-Emitting Diode) display device, and the array circuit layer 20 may further include an anode of an OLED device or the entire OLED device.
In the embodiment of the present invention, the array substrate having the array circuit layer 20 is disposed on the substrate 10, so that the function of the conventional array substrate can be realized.
Second, the conductive layer 30 is located at the outer side of the array circuit layer 20, and the array substrate forms a display panel after being boxed opposite to the box-facing substrate, wherein one side of the array substrate faces the inside of the box, and the other side faces the outside. That is, the positional relationship between the conductive layer 30 and the base substrate 10 is not particularly limited, and the conductive layer 30 may be located outside the base substrate 10 as shown in fig. 1, or the conductive layer 30 may be located between the array circuit layer 20 and the base substrate 10 as shown in fig. 2, as long as the conductive layer 30 can be located outside the array circuit layer 20 and grounded.
Thirdly, the conductive layer 30 is not connected to the array circuit layer 20, when the conductive layer 30 is disposed at a position between the array circuit layer 20 and the substrate 10 as shown in fig. 2, the conductive layer 30 and the array circuit layer 20 may be separated by an insulating layer, or the conductive layer 30 may be disposed in a pattern form, wherein a hollowed portion of the conductive layer 30 leaves a line trace on the array circuit layer 20 to prevent the conductive layer 30 from being connected to the array circuit layer 20.
Fourth, the conductive layer 30 in the embodiment of the present invention is grounded, for example, the conductive layer 30 may be grounded through an external lead, or the conductive layer 30 may be connected to a ground terminal.
The embodiment of the invention provides an array substrate, a touch display panel and a touch display device, which comprise a substrate, an array circuit layer arranged on the substrate and a conducting layer arranged on the substrate, wherein the conducting layer is positioned at the outer side of the array circuit layer and is grounded, and the conducting layer is not communicated with the array circuit layer. The conductive layer is arranged on the outer side of the array circuit layer on the substrate and grounded, and the conductive layer is not communicated with the array circuit layer, so that a shielding layer can be formed through the grounded conductive layer, interference signals possibly generated between the back of the touch display panel and the flexible circuit board in the installation process are shielded, and the stability of signal identification of the array substrate in the installation process is improved.
The array substrate of the embodiment of the invention can be applied to a Liquid Crystal Display (LCD) Display device and can also be applied to an Organic Light Emitting Diode (OLED) Display device.
Preferably, as shown in fig. 2, the conductive layer 30 is disposed between the substrate base plate 10 and the array circuit layer 20.
When the array substrate of the embodiment of the invention is applied to the OLED display device, because the OLED display device has the self-luminous capability, a backlight module does not need to be additionally arranged, and therefore, the conducting layer 30 is firstly arranged on the substrate 10, and then the array circuit layer 20 is arranged, so that the normal display of the OLED display device is not affected.
Preferably, the material of the conductive layer 30 is a transparent conductive material.
For example, the commonly used transparent conductive material may be ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide), and the conductive layer 30 is formed by using the above transparent conductive material to form a thin film layer.
Thus, when the array substrate according to the embodiment of the invention is applied to a liquid crystal display device, the liquid crystal display device needs to dispose a backlight module outside the array substrate to provide a backlight source for the liquid crystal display device. The conductive layer 30 is made of a transparent conductive material, and can reduce the blocking or shading of the backlight source provided by the backlight module, thereby affecting the efficiency of the backlight module.
Further, as shown in fig. 3, the array substrate further includes a grounding portion 40 located in the non-display region X inside the array circuit layer 20, and the conductive layer 30 is connected to the grounding portion 40.
As shown in fig. 3, the conductive layer 30 is connected to the ground 40 via an external wire, so that the conductive layer 30 is grounded. In order to avoid the external circuit added on the display panel to affect the appearance of the display panel, and the external wires are easily affected by the external environment or damaged by people.
Therefore, it is preferable that the conductive layer 30 is connected to the ground portion 40 by forming a via hole in the non-display area X of the array circuit layer 20 as shown in fig. 4, so that, on one hand, since the array circuit layer 20 has no metal layer structure in the non-display area X, forming a via hole in the non-display area X does not cause a problem that the array substrate cannot be used due to the conductive layer 30 being connected to the trace of the array circuit layer 20, and on the other hand, the conductive layer 30 is connected to the ground portion 40 inside the array substrate, thereby preventing the appearance from being affected by the addition of an external wire and the external wire from being easily damaged.
When the array substrate provided by the embodiment of the invention is applied to a touch display panel, the touch display panel is attached to a flexible circuit board (when the display panel is a liquid crystal display panel, the outer side of the array substrate also comprises a backlight module) on the outer side of the array substrate in the whole installation process, so that gapless attachment is difficult to completely guarantee. In the attaching process, the position where part of the display panel is deformed or has a gap can generate a capacitance to ground, for the display panel which selects self-capacitance type touch control, the generated capacitance to ground can form touch control response at the corresponding position on the touch control display panel, and a user does not perform touch control operation at the point, so that ghost points which are not actually touched are formed, misoperation is generated on the touch control display panel, and the accuracy of the touch control operation of the touch control display panel is influenced.
In this case, the conductive layer 30 communicated with the grounding portion 40 can form a shielding layer in the whole installation process, and shield the ground capacitance generated by the adhesion gap or deformation between the flexible circuit board and the backlight module and the touch display panel, so as to prevent the ground capacitance from being conducted to the touch display panel and form a touch response at a corresponding position to generate a touch ghost point.
Further, as shown in fig. 4, a conductive layer 30 covers the surface of the substrate 10.
The conductive layer 30 is coated on the surface of the base substrate 10, which means that the conductive layer 30 is firstly formed on the base substrate 10, and then another film layer is further formed on the base substrate 10 on which the conductive layer 30 is formed. For example, in order to improve the adhesion between the array circuit layer 20 and the base substrate 10 on the array substrate, a film layer having good adhesion may be formed on the base substrate 10, and then the array circuit layer 20 may be further formed on the film layer, in which case the conductive layer 30 is formed before the film layer.
In this way, since all other film layers formed on the substrate 10 are disposed on the conductive layer 30, the shielding effect of the conductive layer 30 in the whole installation process can include all other film layers, thereby improving the shielding range of the conductive layer 30. In addition, in the liquid crystal display panel, the conductive layer 30 is provided at a position as far as possible from the liquid crystal layer, so that the possibility that the display is affected by a coupling effect between the capacitance formed in the conductive layer 30 and the capacitance for controlling the liquid crystal deflection in the upper layer can be reduced.
Alternatively, at least one of the ground portions 40 is provided in a dot shape, and as shown in fig. 5, 4 of the dot-shaped ground portions 40 are provided, and as shown in fig. 6, each of the ground portions 40 is connected to the conductive layer 30.
As shown in fig. 5, since the 4 dot-shaped ground portions 40 are provided at the four corners of the display panel, the noise signal (or the electrostatic charge) accumulated in the conductive layer 30 can be derived through the nearby ground portions 40, the response speed is increased, and the shielding effect of the conductive layer 30 is enhanced. Here, the installation position and the number of the grounding portions 40 are merely examples, and the installation position and the number of the grounding portions 40 may be set according to actual use requirements, and are not particularly limited herein.
Preferably, as shown in fig. 7, the grounding portion 40 is a strip-shaped conductive line extending along the edge of the array substrate.
It should be noted that the strip-shaped conductive line may be a straight strip as shown in fig. 7, or may be a curved strip, which is not specifically limited in the embodiment of the present invention, and the linear form of the strip-shaped conductive line may be set according to specific situations.
Thus, the grounding portion 40 is a strip-shaped conductive line extending along the edge of the array substrate, and the strip-shaped conductive line is communicated with the conductive layer 30, so that the charge extraction efficiency on the conductive layer 30 can be improved.
Further, as shown in fig. 8, a plurality of vias a (as shown in fig. 8) or strip-shaped through grooves b (as shown in fig. 9) penetrating through the array circuit layer 20 are disposed between the grounding portion 40 and the conductive layer 30, and as shown in fig. 10, the extending direction of the strip-shaped through grooves b is the same as the extending direction of the strip-shaped conductive lines.
As shown in fig. 8, the conductive layer 30 is communicated with the strip conductive line through a plurality of via holes a, and the plurality of via holes a are arranged along the extending direction of the strip conductive line, or, as shown in fig. 9, the conductive layer 30 is communicated with the strip conductive line through a strip through groove b, and the extending direction of the strip through groove b is the same as the extending direction of the strip conductive line. In this way, the conductive layer 30 can be directly grounded via the plurality of vias a or the entire strip-shaped through groove b, and the charge extraction efficiency between the conductive layer 30 and the ground portion 40 is further improved. Moreover, the plurality of through holes a are arranged, the risk of poor contact possibly caused when the single through hole a is connected is reduced, and compared with the through hole a, the strip-shaped through groove b is large in processing area, and the processing difficulty is further reduced.
In addition, the number of the strip conductive wires is not limited in the embodiment of the present invention, and a plurality of strip conductive wires may be arranged along the edge of the array substrate, and when a plurality of strip conductive wires are arranged, as shown in fig. 10, the plurality of strip conductive wires may be connected end to form a closed or non-closed loop shape, as long as the grounding portions 40 are all arranged in the non-display region, so as to avoid the influence on the panel display and avoid the external lines of the array circuit layer 20.
In another aspect of the embodiments of the present invention, a touch display panel is provided, including a display panel and a touch electrode layer, where the display panel includes any one of the array substrates.
The touch display panel is provided with a touch electrode layer, the operation of a functional interface can be realized through finger touch on the surface of the panel, the touch display panel is convenient to use, the array substrate provided with the grounding conductive layer is used in the touch display panel, the generated static electricity can be timely led out in the technical process of the touch display panel, especially when the static electricity reliability test is carried out on the touch display panel, for the liquid crystal touch display panel, the test point position of the static electricity reliability test is positioned in a gap between the panel and a backlight module, the static electricity can be directly led out through the conductive layer with a smaller resistance value in the test process, and therefore the damage possibly caused by the storage and accumulation of the static electricity in the panel to devices inside the panel is avoided.
In the above description of the array substrate, the arrangement and the function of the array substrate in the touch display panel have been described in detail, and are not repeated herein.
In another aspect of the present invention, a touch display device is provided, which includes the touch display panel and a circuit board disposed on a back surface of the touch display panel.
The touch display device can be any product or component with a touch display function, such as a liquid crystal display panel, an OLED display panel, a display, a television, a notebook computer, a digital photo frame, a mobile phone, a tablet computer, a navigator and the like.
In the assembling process of the touch display device, a circuit board needs to be attached to the back of the touch display panel, and a circuit on the circuit board is connected with the touch display panel.
Here, the display surface of the touch display panel is used as the front surface of the touch display panel, and the side away from the display surface is used as the back surface.
The circuit board commonly used is flexible circuit board usually, has certain deformability, the shape at the cooperation touch display panel back that can be better, flexible circuit board is carrying out the in-process of laminating the operation with the touch display panel back, it all closely laminates everywhere on the binding face to be difficult to guarantee, produce the space very easily on the binding face or take place deformation, the position department that produces the space or take place deformation at flexible circuit board can lead to the fact the influence to the touch-control electrode layer of self-contained formula to the electric capacity to ground, lead to producing the ghost point on touch display panel. Through the grounded conducting layer arranged on the array substrate, the ground capacitor formed at the position where the flexible circuit board generates a gap or deforms is shielded outside the conducting layer, so that the touch electrode layer arranged in the conducting layer is prevented from being interfered, and the installation stability and the touch operation accuracy of the touch display device are improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (6)

1. The utility model provides an array substrate for self-capacitance touch-control display panel, includes substrate base plate and sets up the array circuit layer on substrate base plate, its characterized in that still includes: the conducting layer is arranged between the substrate base plate and the array circuit layer and is grounded, and the conducting layer is not communicated with the array circuit layer;
further comprising: a grounding part located in a non-display area at the inner side of the array circuit layer, wherein the conducting layer is connected with the grounding part;
a plurality of through holes or strip-shaped through grooves penetrating through the array circuit layer are arranged between the grounding part and the conducting layer, and the extending direction of the strip-shaped through grooves is the same as that of the strip-shaped conducting wires;
in the process of attaching the back of the self-capacitance touch display panel to the flexible circuit board, the grounded conducting layer arranged on the array substrate can shield the grounded capacitance formed at the position where the flexible circuit board generates a gap or deforms outside the conducting layer, so that the touch electrode layer arranged in the conducting layer is prevented from being interfered, and the phenomenon that the self-capacitance touch display panel generates ghost points in the installation process is avoided.
2. The array substrate of claim 1, wherein the grounding portions are point-shaped and at least one grounding portion is provided, and each grounding portion is connected to the conductive layer.
3. The array substrate of claim 1, wherein the grounding portion is a strip-shaped conductive line extending along an edge of the array substrate.
4. The array substrate of claim 1, wherein the conductive layer is made of a transparent conductive material.
5. A self-capacitance touch display panel, comprising: a display panel and a touch electrode layer, wherein the display panel comprises the array substrate of any one of claims 1 to 4.
6. A self-capacitance touch display device, comprising the touch display panel of claim 5, and a circuit board disposed on the back of the touch display panel.
CN201710003653.9A 2017-01-03 2017-01-03 Array substrate, touch display panel and touch display device Active CN106648258B (en)

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CN107505749A (en) * 2017-08-31 2017-12-22 广东欧珀移动通信有限公司 Display screen and electronic equipment
CN107526207A (en) * 2017-08-31 2017-12-29 广东欧珀移动通信有限公司 Display screen and electronic equipment
CN107664891A (en) * 2017-10-26 2018-02-06 京东方科技集团股份有限公司 A kind of array base palte, its preparation method, display panel and display device

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