CN107817638B - Array substrate, display panel and display device - Google Patents
Array substrate, display panel and display device Download PDFInfo
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- CN107817638B CN107817638B CN201711176301.XA CN201711176301A CN107817638B CN 107817638 B CN107817638 B CN 107817638B CN 201711176301 A CN201711176301 A CN 201711176301A CN 107817638 B CN107817638 B CN 107817638B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Molecular Biology (AREA)
- Human Computer Interaction (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides an array substrate, a display panel and a display device, wherein a pressure-sensitive touch structure is integrated in the array substrate, the pressure-sensitive touch structure comprises pressure-sensitive conductive resin, a driving wire and touch detection wires, the pressure-sensitive conductive resin is positioned between the driving wire and the touch detection wires and is respectively connected to a signal driving port and a signal detection port of a frame area through the corresponding driving wire and touch detection wires, the resistance value of the pressure-sensitive conductive resin changes according to the compression force applied to the pressure-sensitive conductive resin, and the position of the array substrate applied with touch is detected based on the change of the current value flowing through the pressure-sensitive conductive resin, so that the low cost and the thinning of the display device with the touch function are realized.
Description
Technical Field
The invention relates to the technical field of display, in particular to an array substrate integrated with a pressure-sensitive touch structure, a display panel and a display device of the display panel.
Background
The electrophoretic display is a display in which the movement of electrophoretic particles in an electrophoretic film is controlled by an electric field between two electrodes (e.g., a pixel electrode and a common electrode), and the reflection of incident light from the outside is controlled by the position of the moved electrophoretic particles, thereby implementing image display. Due to its unique advantages of extremely low power consumption, reduced paper visibility, and suitability for human reading, the electrophoretic Display technology is attracting people's attention, and especially in the field of static Display (such as labels, books, newspapers, billboards, and nameplates), it will become an irreplaceable Display technology for LCD (Liquid Crystal Display) and OLED (Organic Light Emitting Diode).
Currently, with the requirement of combining touch control and display, a touch control type electrophoretic display device is developed for a user to control the electrophoretic display device by touching a screen of the electrophoretic display device. At present, the touch-controllable electrophoretic display device on the market mostly adopts a mode of externally hanging a touch module, namely a structure for jointing the touch module and the electrophoretic display device. The plug-in touch module has more types and different structures. For example, the touch modules generally include at least one glass substrate, and some touch modules include more than two glass substrates, wherein the glass substrates are disposed with sensing electrodes, and the glass substrates are used as carrier substrates for disposing the sensing electrodes, and the sensing electrodes are used for sensing the touch position of the user. However, compared with the integrated touch control, any architecture has the problems of large thickness and high cost, and is not favorable for the thin design of products.
Disclosure of Invention
The invention aims to provide an array substrate integrated with a pressure-sensitive touch structure, a display panel and a display device
First, the present invention provides an array substrate, including: the display area and a frame area arranged around the display area; the plurality of sub-pixels are arranged in an array mode and are positioned in the display area, and each sub-pixel comprises a pixel electrode; the signal driving circuit is positioned in the frame area and comprises a signal driving port and a signal detection port; driving lines extending in a first direction and arranged in a second direction; the touch detection lines extend along a second direction and are arranged along a first direction, and the first direction is intersected with the second direction; and a pressure-sensitive conductive resin which is located between the driving lines and the touch detection lines and is connected to the signal driving port and the signal detection port through the corresponding driving lines and the corresponding touch detection lines, respectively, wherein a resistance value of the pressure-sensitive conductive resin changes according to a compression force applied to the pressure-sensitive conductive resin, so that a current value flowing through the pressure-sensitive conductive resin changes, and a position where touch is applied to the array substrate is detected based on the change in the current value flowing through the pressure-sensitive conductive resin.
In an embodiment of the present invention, the array substrate further includes a data line and a plurality of thin film transistors arranged in an array, and a source and a drain of each of the thin film transistors are respectively connected to the corresponding data line and the corresponding pixel electrode; the driving lines are connected to the gates of the corresponding thin film transistors.
In an embodiment of the invention, the array substrate further includes a storage electrode, and the driving line is connected to the storage electrode.
In an embodiment of the present invention, the array substrate further includes a plurality of thin film transistors arranged in an array, each of the thin film transistors having a source and a drain respectively connected to the corresponding data line and the corresponding pixel electrode, and a gate line connected to the gate of the corresponding thin film transistor; the driving lines and the gate lines are formed in the same layer.
In an embodiment of the invention, the driving lines include a plurality of first sub-driving lines and a plurality of second sub-driving lines, and the pressure-sensitive conductive resin is located between the first sub-driving lines and the touch detection lines.
In an embodiment of the invention, the array substrate includes a plurality of second sub-driving line groups, each of the second sub-driving line groups includes a plurality of second sub-driving lines, and the second sub-driving line groups and the first sub-driving lines are alternately arranged at intervals.
In an embodiment of the invention, the array substrate further includes a storage electrode, and the driving line is connected to the storage electrode; the plurality of second sub-driving lines of the same second sub-driving line group are connected with each other, each first sub-driving line is connected to one second sub-driving line group adjacent to the first sub-driving line, and different first sub-driving lines are connected to different second sub-driving line groups.
In an embodiment of the invention, the array substrate includes a plurality of touch detection line groups, each touch detection line group includes a plurality of touch detection lines, and the touch detection lines in each touch detection line group are connected to each other.
In an embodiment of the invention, the array substrate further includes a protection electrode, and the protection electrode and the pixel electrode are disposed in the same layer and cover the touch detection line.
In an embodiment of the present invention, the array substrate further includes a connection electrode, the connection electrode and the touch detection line are formed on the same layer, the array substrate further includes a plurality of thin film transistors arranged in an array, and the pixel electrode is connected to the drain of the thin film transistor through the connection electrode.
In addition, the invention also provides a display panel which comprises any one of the array substrates.
In an embodiment of the invention, the display panel is an electrophoretic display panel, and the electrophoretic display panel further includes an electrophoretic film layer, a common electrode layer and a protective layer, the electrophoretic film layer is located between the array substrate and the protective layer, and the common electrode layer is located between the electrophoretic film layer and the protective layer.
In addition, the invention also provides a display device which comprises any one of the display panels.
Compared with the prior art, the technical scheme provided by the invention has the following advantages: the array substrate, the display panel and the display device provided by the invention are provided with the pressure-sensitive conductive resin in the array substrate, the pressure-sensitive conductive resin is positioned between the driving wires and the touch detection wires and is respectively connected to the signal driving port and the signal detection port of the frame area through the corresponding driving wires and the corresponding touch detection wires, the resistance value of the pressure-sensitive conductive resin changes according to the compression force applied to the pressure-sensitive conductive resin, the current value flowing through the pressure-sensitive conductive resin changes, and the position of the array substrate applied with touch is detected based on the change of the current value flowing through the pressure-sensitive conductive resin, so that the low cost and the thinning of the display device with the touch function are realized.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic cross-sectional view of an array substrate according to an embodiment of the invention;
fig. 2 is a schematic top view of the array substrate shown in fig. 1;
FIG. 3 is a schematic cross-sectional view of an array substrate according to another embodiment of the present invention;
fig. 4 is a schematic top view illustrating an array substrate according to another embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of an array substrate according to another embodiment of the present invention;
FIG. 6 is a schematic top view of the array substrate shown in FIG. 5;
fig. 7 is a schematic top view illustrating an array substrate according to still another embodiment of the present invention;
fig. 8 is a schematic diagram of a display panel according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
First, referring to fig. 1 and 2, fig. 1 is a schematic cross-sectional view of an array substrate according to an embodiment of the present invention, fig. 2 is a schematic top view of the array substrate shown in fig. 1, an array substrate 10 of this embodiment includes a display area and a frame area surrounding the display area, in the display area, the array substrate 10 includes a substrate 101, a sub-pixel P, a thin film transistor T, a data line DL, a gate line GL and a pressure-sensitive touch structure, and the pressure-sensitive touch structure includes a driving line CL, a touch detection line SL and a pressure-sensitive conductive resin 14 located between the driving line CL and the touch detection line SL.
In this embodiment, the array substrate 10 includes a plurality of sub-pixels P located in a display area of the array substrate, wherein each sub-pixel P is disposed on the substrate 101, and each sub-pixel P is arranged in an array, as shown in fig. 2. In general, the subpixels P arranged in an array may include multiple rows of subpixels and multiple columns of subpixels. Wherein each column of sub-pixels may include a plurality of sub-pixels P arranged in the second direction D2, and each row of sub-pixels may include a plurality of sub-pixels P arranged in the first direction D1. Here, the first direction D1 intersects the second direction D2, as shown in fig. 2. The array substrate 10 further includes a plurality of data lines DL, gate lines GL and a plurality of touch detection lines SL, each data line DL extends along the second direction D2 and is arranged along the first direction D1, and each column of sub-pixels may be connected to one data line DL, i.e., each sub-pixel P in each column of sub-pixels is connected to the same data line DL. The gate lines GL extend along the first direction D1 and are arranged along the second direction D2, and each row of sub-pixels may be connected to one gate line GL, i.e. each sub-pixel P in each row of sub-pixels is connected to the same gate line GL, as shown in fig. 2.
Specifically, the array substrate 10 further includes a plurality of thin film transistors T arranged in an array, each thin film transistor T is located near a crossing position of the data line DL and the gate line GL, and each thin film transistor T includes a gate electrode 11, a semiconductor channel 12 overlapping with the gate electrode, a gate insulating layer 102 disposed between the gate electrode 11 and the semiconductor channel 12, and a source electrode 131 and a drain electrode 132 respectively connected to both sides of the semiconductor channel 12. The gate electrode 11 of the thin film transistor T is connected to the gate line GL, and the source electrode 131 of the thin film transistor T is connected to the data line DL. Each of the sub-pixels P includes a pixel electrode 15, and the pixel electrode 15 is connected to the drain electrode 132 of the thin film transistor T. In the present embodiment, the gate and the gate line may be selectively formed in the same layer; the source electrode, the drain electrode and the data line can be selectively formed by the same film layer. However, the invention is not limited thereto, and in other embodiments, the film relationship between the gate and the gate line and/or the film relationship between the source and the drain and the data line may be designed appropriately according to actual requirements. The pixel electrode may be a transparent conductive layer made of a transparent conductive material such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or the like.
Further, in this embodiment, the array substrate 10 further includes a plurality of driving lines CL, a plurality of touch detection lines SL and a pressure-sensitive conductive resin 14, the pressure-sensitive conductive resin 14 is located at the intersection of the driving lines CL and the touch detection lines SL and between the driving lines CL and the touch detection lines SL, and is directly connected to the driving lines CL and the touch detection lines SL, respectively, and a signal driving circuit (not shown in fig. 1 and 2) located in the frame area, the signal driving circuit includes a signal driving port and a signal detection port. The driving lines CL extend along a first direction D1 and are arranged along a second direction D2, and the touch detection lines SL extend along a second direction D2 and are arranged along a first direction D1; the pressure-sensitive conductive resin 14 is located at the crossing position of the driving line CL and the touch detection line SL, is located between the driving line CL and the touch detection line SL, is directly connected to the driving line CL and the touch detection line SL, and is connected to the signal driving port and the signal detection port through the driving line CL and the touch detection line SL correspondingly connected thereto, when an external force is applied to the array substrate, the resistance value of the pressure-sensitive conductive resin 14 changes according to a compressive force applied to the pressure-sensitive conductive resin 14, so that the position of the array substrate to which a touch is applied can be detected based on the change of a current value flowing through the pressure-sensitive conductive resin 14. A pressure-sensitive conductive resin obtained by adding conductive particles as a filler to a base resin can be used. The base resin may be a resin material having elasticity such as silicone, urethane, or polyimide, and the conductive particles may be nanoparticles of carbon, Ag, or Ni.
In the present embodiment, as shown in fig. 1, it may be provided that: the array substrate 10 further includes a planarization layer 103 between the thin film transistor T and the pixel electrode 15, and the pixel electrode 15 may be connected to the drain electrode 132 of the thin film transistor T through a via hole penetrating the planarization layer 103, for example. The planarization layer 103 is spaced between the touch detection lines SL and the driving lines CL, and the pressure-sensitive conductive resin 14 may be formed in the via holes of the planarization layer 103 between the touch detection lines SL and the driving lines CL by, for example, an inkjet printing method or an offset printing method, and the upper and lower sides thereof are in direct contact with the touch detection lines SL and the driving lines CL, respectively.
Further, in this embodiment, the array substrate further includes a storage electrode (not shown in the figure), and an overlapping region is formed between the storage electrode and the pixel electrode, and the driving line is connected to the storage electrode, that is, in this embodiment, the driving line is multiplexed as a common electrode signal line of the array substrate for providing a signal to the storage electrode, and in the display stage, for example, a common voltage signal can be provided to the storage electrode, so as to form a storage capacitor between the storage electrode and the pixel electrode, and of course, the driving line can also be multiplexed as a common electrode signal line for providing a common voltage signal to the common electrode; in the touch stage, a scanning signal is sequentially provided to each driving line from top to bottom, the scanning signal is transmitted to the pressure-sensitive conductive resin correspondingly connected to the driving line through the driving line, and the scanning signal may be, for example, a common voltage signal. If no external touch action occurs, the potential of the common voltage signal is basically a certain value, and the current flowing through the pressure-sensitive conductive resin is also basically a fixed value, so that signal change cannot be caused; when an external touch action occurs, the pressure-sensitive conductive resin is acted by a compressive force, the resistance value is reduced, the current is increased, and a signal with changed current is transmitted to a signal detection port through a touch detection line SL connected with the pressure-sensitive conductive resin to identify a column coordinate; meanwhile, the scanning time of the driving lines is different, and the row coordinates can be locked, so that the position where touch occurs is located.
The driving line CL and the gate line GL can be selectively formed in the same layer. For example, in the manufacturing process of the array substrate, a first metal layer made of a metal material is formed on a substrate, and a gate line, a gate electrode and a driving line CL are formed by a patterning means; the method comprises the steps of manufacturing a second metal layer, and forming a data line, a source electrode and a drain electrode through a graphical means; the method comprises the steps of manufacturing a third metal layer, forming a touch detection line through a graphical means, and improving the signal transmission speed, reducing the loss and improving the touch detection sensitivity due to the low resistivity of the metal material.
Further, in the present embodiment, the third metal layer where the touch detection line SL is located between the planarization layer 103 and the electrode layer where the pixel electrode 15 is located, the connection electrode 133 may be formed while forming the touch detection line SL by a patterning means, the connection electrode 133 is connected to the drain electrode 132 of the corresponding thin film transistor T through a via hole penetrating through the planarization layer 103, and the pixel electrode 15 is in direct contact with the connection electrode 133 and is connected to the drain electrode 132 through the connection electrode 133. The resistivity of the metal connection electrode 133 is relatively low compared to the pixel electrode formed of a transparent conductive metal oxide, so that the problem of the third metal layer remaining in the via hole can be solved, and the contact resistance between the pixel electrode and the drain electrode of the thin film transistor can be optimized.
The array substrate provided by the embodiment integrates the pressure sensing touch structure in the array substrate, thereby being beneficial to realizing low cost and thinning of the display device with the touch function. In addition, the driving lines of the pressure sensing touch structure and the common electrode signal lines for displaying are multiplexed, so that the thickness of the array substrate is further reduced while the cost is reduced.
Fig. 3 is a schematic cross-sectional view of an array substrate according to another embodiment of the present invention, and similarly, the array substrate according to this embodiment includes a pressure-sensitive touch structure integrated inside the substrate, where the pressure-sensitive touch structure includes driving lines, touch detection lines, and a pressure-sensitive conductive resin, the pressure-sensitive conductive resin is located between the driving lines and the touch detection lines and is connected to signal driving ports and signal detection ports of a frame area through the corresponding driving lines and touch detection lines, respectively, and a resistance value of the pressure-sensitive conductive resin changes according to a compressive force applied to the pressure-sensitive conductive resin, and a position of the array substrate where a touch is applied is detected based on a change in a current value flowing through the pressure-sensitive conductive resin.
The difference is that in this embodiment, the metal layer where the touch detection line SL is located between the planarization layer and the electrode layer where the pixel electrode 15 is located, the protective electrode 151 may be formed while the pixel electrode 15 is formed in a patterned manner, the protective electrode 151 is located on a side of the touch detection line SL away from the substrate and covers the touch detection line SL, so that the touch detection line SL may be protected from corrosion and scratch caused by external moisture, chemical materials, and the like, and the stability of touch detection is increased.
Fig. 4 is a schematic diagram illustrating a top view structure of an array substrate according to still another embodiment of the present invention, and similarly, the array substrate according to this embodiment includes a pressure-sensitive touch structure integrated inside the substrate, the pressure-sensitive touch structure includes driving lines, touch detection lines, and a pressure-sensitive conductive resin, the pressure-sensitive conductive resin is located at intersections of the driving lines and the touch detection lines and located between the driving lines and the touch detection lines, and is connected to signal driving ports and signal detection ports of a frame area through the corresponding driving lines and touch detection lines, respectively, a resistance value of the pressure-sensitive conductive resin changes according to a compressive force applied to the pressure-sensitive conductive resin, so that a current value flowing through the pressure-sensitive conductive resin changes, and a position of the array substrate where a touch is applied is detected based on the change in the current value flowing through the pressure-sensitive conductive resin.
The difference is that the array substrate provided by the present embodiment is not provided with the pressure-sensitive conductive resin at the intersection of each driving line and each touch detection line. In this embodiment, for example, the following may be set: the array substrate includes a plurality of first sub-driving lines CL1 and a plurality of second sub-driving lines CL2, and the pressure-sensitive conductive resin 14 is disposed only at the crossing positions of the first sub-driving lines CL1 and the touch detection lines SL and between the first sub-driving lines CL1 and the touch detection lines SL. When the driving lines are multiplexed into the common electrode signal lines, the density of the driving lines is very high relative to the area involved on the array substrate during external touch control, pressure-sensitive conductive resin does not need to be arranged at the intersection position of each driving line and the touch detection line, and the density of the pressure-sensitive conductive resin meets the touch control requirement, so that the touch control sensitivity is not influenced, and the manufacturing cost can be reduced. The first sub-driving line CL1 can be spaced apart from the second sub-driving line CL2, or the first sub-driving line CL1 is uniformly distributed in the display area of the array substrate, so as to improve the touch detection accuracy.
Further, the following steps can be further provided: the array substrate comprises a plurality of second sub-driving line groups, each second sub-driving line group comprises at least a plurality of second sub-driving lines CL2, and the second sub-driving line groups and the first sub-driving lines CL1 are alternately arranged at intervals.
Further, the following steps can be further provided: the array substrate comprises a plurality of second sub-driving line groups, each second sub-driving line group comprises at least a plurality of second sub-driving lines CL2, and the second sub-driving line groups and the first sub-driving lines CL1 are alternately arranged at intervals. The plurality of second sub-driving lines CL2 of the same second sub-driving line group are connected to each other and are simultaneously connected to a first lead 16 located in the frame area, each first sub-driving line CL1 is connected to a first lead 16 of an adjacent second sub-driving line group and is connected to a signal driving port located in the frame area through the first lead 16, the signal driving port is located in the signal driving circuit 18 of the frame area, and different first sub-driving lines CL1 are connected to different second sub-driving line groups, so that the impedance of each first sub-driving line CL1 can be reduced, and the touch sensitivity can be increased.
In this embodiment, the array substrate may further include a plurality of touch detection line groups, each touch detection line group includes a plurality of touch detection lines SL, and all the touch detection lines SL in the touch detection line group are connected to the same second lead 17 and connected to a signal detection port located in the frame area through the second lead 17, where the signal detection port is located in the signal driving circuit 18 in the frame area. Therefore, all the pressure-sensitive currents in one touch detection line group can be gathered together, signals are amplified, and the touch signals can be conveniently identified by the signal detection ports.
Fig. 5 is a schematic cross-sectional view of an array substrate according to still another embodiment of the present invention, and fig. 6 is a schematic top view of the array substrate shown in fig. 5, in this embodiment, the array substrate 10 includes a plurality of driving lines CL, a plurality of touch detection lines SL and a pressure-sensitive conductive resin 14, wherein the pressure-sensitive conductive resin 14 is located at the intersection of the driving lines CL and the touch detection lines SL, is located between the driving lines CL and the touch detection lines SL, and is directly connected to the driving lines CL and the touch detection lines SL, respectively, and a signal driving circuit (not shown in fig. 5 and 6) located in a frame region, and includes a signal driving port and a signal detection port. The driving lines CL extend along a first direction D1 and are arranged along a second direction D2, the touch detection lines SL extend along a second direction D2 and are arranged along a first direction D1, and the first direction D1 intersects with the second direction D2; the pressure-sensitive conductive resin 14 is located at the intersection of the driving line CL and the touch detection line SL and between the driving line CL and the touch detection line SL, is directly connected to the driving line CL and the touch detection line SL, and is connected to the signal driving port and the signal detection port through the driving line CL and the touch detection line SL correspondingly connected thereto.
In this embodiment, the array substrate 10 further includes a plurality of sub-pixels arranged in an array and a plurality of data lines DL, and each data line DL extends along the second direction D2 and is arranged along the first direction D1. The plurality of sub-pixels arranged in an array comprise a plurality of sub-pixel columns and a plurality of sub-pixel rows, each column of sub-pixels can be connected with one data line DL, namely, each sub-pixel in each column of sub-pixels is connected with the same data line DL; the driving lines CL are multiplexed as gate lines of the array substrate, and each row of sub-pixels may be connected with one driving line CL, that is, each sub-pixel in each row of sub-pixels is connected with the same driving line CL. Specifically, the array substrate 10 further includes a plurality of thin film transistors T arranged in an array, each thin film transistor T is located near a crossing position of the data line DL and the driving line CL, a gate of the thin film transistor T is connected to the driving line CL, and a source and a drain of the thin film transistor T are respectively connected to the data line DL and the pixel electrode. In the present embodiment, the gate and the driving line CL can be selectively formed by the same film layer; the source electrode, the drain electrode and the data line can be selectively formed by the same film layer.
In the present embodiment, the driving line CL is multiplexed as a gate line of the array substrate, and in the display stage, a gate driving signal for display is provided to each sub-pixel row through the driving line CL; in the touch control stage, a scanning signal is provided for each driving line from top to bottom in sequence, and the scanning signal is transmitted to the pressure-sensitive conductive resin correspondingly connected with the driving line through the driving line. For example, the voltage of the scanning signal provided to each driving line can be 0-15V, so that the leakage current of the display thin film transistor connected to the driving line is low and is in an off state, and the display state of the corresponding sub-pixel is not influenced. If no external touch action occurs, the potential of the common voltage signal is basically a certain value, and the current flowing through the pressure-sensitive conductive resin is also basically a fixed value, so that signal change cannot be caused; when an external touch action occurs, the resistance value of the pressure-sensitive conductive resin is reduced and the current is increased due to the action of the compressive force, a signal with current change is transmitted to the signal detection port through the touch detection line SL connected with the pressure-sensitive conductive resin to identify the column coordinate, and meanwhile, the row coordinate can be locked through different scanning time of the driving line, so that the position where the touch occurs is located. The driving lines of the pressure sensing touch structure and the common electrode signal lines for displaying are multiplexed, so that the thickness of the array substrate is further reduced while the cost is reduced.
Fig. 7 is a schematic top view of an array substrate according to still another embodiment of the present invention, which is different from the array substrates shown in fig. 5 and 6 in that a pressure-sensitive conductive resin is not disposed at the crossing position of each driving line and each touch detection line. In this embodiment, for example, the following may be set: the array substrate includes a plurality of first sub-driving lines CL1 and a plurality of second sub-driving lines CL2, and the pressure-sensitive conductive resin 14 is disposed only between the first sub-driving lines CL1 and the touch detection lines SL. When the driving lines are multiplexed into the gate lines, the density of the driving lines is very large relative to the area size involved on the array substrate during external touch control, pressure-sensitive conductive resin does not need to be arranged at the intersection position of each driving line and the touch detection lines, and the density of the pressure-sensitive conductive resin meets the touch control requirement, so that the touch control sensitivity is not influenced, and the manufacturing cost can be reduced. The first sub-driving line CL1 can be spaced apart from the second sub-driving line CL2, or uniformly distributed in the display area of the array substrate, for example, to improve the touch detection accuracy.
Further, the following steps can be further provided: the array substrate comprises a plurality of second sub-driving line groups, each second sub-driving line group comprises at least a plurality of second sub-driving lines CL2, and the second sub-driving line groups and the first sub-driving lines CL1 are alternately arranged at intervals.
In this embodiment, the array substrate may further include a plurality of touch detection line groups, each touch detection line group includes a plurality of touch detection lines SL, and all the touch detection lines SL in the touch detection line group are connected to the same second lead 17 and connected to a signal detection port located in the frame area through the second lead 17, where the signal detection port is located in the signal driving circuit 18 in the frame area. The distribution density of the touch detection lines is actually very large relative to the area size involved on the array substrate during external touch, and each touch area may include a plurality of touch detection lines, so the touch detection lines may be grouped as described above, for example, each touch detection line group includes N touch detection lines, the first touch detection line that is opened is at a voltage of V1, and the remaining touch detection lines that are not opened are at a voltage of V2, when no touch action occurs, N touch detection lines in each touch detection line group are always opened (N-1) and are not opened, so the total voltage is V1+ (N-1) V2, and the current signal flowing through all the pressure-sensitive conductive resins in each touch detection line group and transmitted to the signal detection port through the second lead is also substantially constant, no signal change is caused; however, when a touch action occurs, all the pressure-sensitive currents in one touch detection line group can be gathered together, and signals are amplified, so that the touch signals can be more conveniently identified by the signal detection ports, and the touch detection sensitivity of the pressure-sensitive touch structure is increased.
In addition, the invention also provides a display panel which comprises any one of the array substrates in the embodiment. Fig. 8 is a schematic view of a display panel according to an embodiment of the present invention, where the display panel is an electrophoretic display panel, and the electrophoretic display panel further includes an array substrate 10, an electrophoretic layer 20, a common electrode layer 31 and a protection layer 30, the common electrode layer 31 is located on one side of the protection layer 30 facing the array substrate 10, and the electrophoretic layer 20 is located between the common electrode layer 31 and the array substrate 10. The electrophoretic film layer 20 includes a plurality of electrophoretic particles, and when the electrophoretic display panel displays a black-and-white picture, the electrophoretic particles may include black electrophoretic particles and white electrophoretic particles; when the electrophoretic display panel displays a color screen, the electrophoretic particles may include electrophoretic particles of a plurality of colors, such as red electrophoretic particles, blue electrophoretic particles, green electrophoretic particles, and the like.
The movement of the electrophoretic particles may be achieved by an electric field, that is, the electrophoretic particles may be moved according to the magnitude and direction of the electric field between the common electrode and the pixel electrode, for example, when a ground voltage is applied to the common electrode and a data voltage is applied to the pixel electrode, the white electrophoretic particles, which are positively charged, may be moved to the common electrode and the black electrophoretic particles, which are negatively charged, may be moved to the pixel electrode, so that, when external light is incident from the pixel electrode side, the incident light is reflected by the black electrophoretic particles, which are negatively charged, and thus it can be observed that the pixel appears black.
When external touch action is applied to the protective layer, the protective layer and the electrophoretic film layer at the position are deformed to transmit pressure to the pressure-sensitive conductive resin, the resistance value of the corresponding pressure-sensitive conductive resin changes according to the compression force applied to the pressure-sensitive conductive resin, and the position of the display panel where touch is applied can be detected based on the change of the current value flowing through the pressure-sensitive conductive resin.
Of course, the display panel is not limited to the electrophoretic display panel, and may be applied to a total reflection type liquid crystal display panel. Because the electrophoretic display panel and the total reflection type liquid crystal display panel have no requirement on the aperture opening ratio, the wiring mode, the position selection and the width setting of the touch detection line are relatively free.
Of course, the display panel may also be a transmissive liquid crystal display panel, and at this time, the touch detection lines and the data lines may be disposed in parallel and located in the light shielding region, for example, the touch detection lines may be disposed right above the data lines, so as to reduce or even eliminate the influence of the introduction of the touch detection lines on the aperture ratio as much as possible.
In addition, the invention also provides a display device which comprises any one of the display panels described in the above embodiments. It will be appreciated by those skilled in the art that the display device may comprise some other known structure in addition to the display panel as described above. Such well-known structures will not be further described in order not to obscure the focus of the present application.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. An array substrate, comprising:
the display area and a frame area arranged around the display area;
the plurality of sub-pixels are arranged in an array mode and are positioned in the display area, and each sub-pixel comprises a pixel electrode;
the signal driving circuit is positioned in the frame area and comprises a signal driving port and a signal detection port;
driving lines extending in a first direction and arranged in a second direction;
the touch detection lines extend along a second direction and are arranged along a first direction, and the first direction is intersected with the second direction;
pressure-sensitive conductive resin located between the driving lines and the touch detection lines and connected to the signal driving ports and the signal detection ports through the corresponding driving lines and the corresponding touch detection lines, respectively, wherein the driving lines are directly connected to the signal driving ports, and the touch detection lines are directly connected to the signal detection ports; a resistance value of the pressure-sensitive conductive resin changes according to a compression force applied to the pressure-sensitive conductive resin, a current value flowing through the pressure-sensitive conductive resin changes, and a position where touch is applied to the array substrate is detected based on the change in the current value flowing through the pressure-sensitive conductive resin;
a planarization layer including a via hole between the touch detection line and the driving line, the pressure-sensitive conductive resin being in the via hole, and upper and lower sides of the pressure-sensitive conductive resin being in direct contact with the touch detection line and the driving line, respectively;
the driving lines comprise a plurality of first sub-driving lines and a plurality of second sub-driving lines, and the pressure-sensitive conductive resin is positioned between the first sub-driving lines and the touch detection lines; the array substrate comprises a plurality of second sub-driving line groups, each second sub-driving line group comprises a plurality of second sub-driving lines, and the second sub-driving line groups and the first sub-driving lines are alternately arranged at intervals.
2. The array substrate of claim 1, wherein the array substrate further comprises a data line and a plurality of thin film transistors arranged in an array, and a source and a drain of each thin film transistor are respectively connected to the corresponding data line and the corresponding pixel electrode;
the driving lines are connected to the gates of the corresponding thin film transistors.
3. The array substrate of claim 1, wherein the array substrate further comprises a storage electrode, and the driving line is connected to the storage electrode.
4. The array substrate of claim 3, wherein the array substrate further comprises a data line, a gate line and a plurality of thin film transistors arranged in an array, wherein a source electrode and a drain electrode of each thin film transistor are respectively connected to the corresponding data line and the pixel electrode, and the gate line is connected to the gate electrode of the corresponding thin film transistor;
the driving lines and the gate lines are formed in the same layer.
5. The array substrate of claim 1, wherein the array substrate further comprises a storage electrode, the driving line is connected to the storage electrode;
the plurality of second sub-driving lines of the same second sub-driving line group are connected with each other, each first sub-driving line is connected to one second sub-driving line group adjacent to the first sub-driving line, and different first sub-driving lines are connected to different second sub-driving line groups.
6. The array substrate of claim 1, wherein the array substrate comprises a plurality of touch detection line groups, each touch detection line group comprises a plurality of touch detection lines, and the touch detection lines in each touch detection line group are connected to each other.
7. The array substrate of claim 1, further comprising a guard electrode disposed in the same layer as the pixel electrode and covering the touch detection lines.
8. The array substrate of claim 1, further comprising connection electrodes formed in the same layer as the touch detection lines,
the array substrate further comprises a plurality of thin film transistors arranged in an array mode, and the pixel electrodes are connected to the drain electrodes of the thin film transistors through the connecting electrodes.
9. A display panel comprising the array substrate according to any one of claims 1 to 8.
10. The display panel of claim 9, wherein the display panel is an electrophoretic display panel, the electrophoretic display panel further comprises an electrophoretic film layer, a common electrode layer and a protective layer, the electrophoretic film layer is located between the array substrate and the protective layer, and the common electrode layer is located between the electrophoretic film layer and the protective layer.
11. A display device comprising the display panel according to claim 9 or 10.
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| TWI676977B (en) * | 2018-09-14 | 2019-11-11 | 友達光電股份有限公司 | Flexible pixel array substrate and flexible display panel using same |
| CN109360842B (en) * | 2018-09-30 | 2020-07-31 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof, driving method thereof and display device |
| CN115167045B (en) * | 2022-07-01 | 2023-11-28 | Tcl华星光电技术有限公司 | Total reflection display panel |
| CN118067279A (en) * | 2022-11-22 | 2024-05-24 | 鹏鼎控股(深圳)股份有限公司 | Pressure sensing device and manufacturing method thereof |
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