CN105892757B - A kind of In-cell touch panel and display device - Google Patents
A kind of In-cell touch panel and display device Download PDFInfo
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- CN105892757B CN105892757B CN201610475290.4A CN201610475290A CN105892757B CN 105892757 B CN105892757 B CN 105892757B CN 201610475290 A CN201610475290 A CN 201610475290A CN 105892757 B CN105892757 B CN 105892757B
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- 239000004973 liquid crystal related substance Substances 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 238000011896 sensitive detection Methods 0.000 claims description 6
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- 229910021393 carbon nanotube Inorganic materials 0.000 description 6
- 229910021389 graphene Inorganic materials 0.000 description 6
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 6
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 6
- 239000007769 metal material Substances 0.000 description 5
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Classifications
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- 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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a kind of In-cell touch panel and display devices, when the In-cell touch panel is pressed, since piezoelectricity inductive layer has piezoelectric effect, when deformation occurs for the effect of compression power, such as it is bent, positive electrode position can be made to generate positive charge, negative electrical charge is generated in negative electrode position, and deformation is bigger, the positive charge and negative electrical charge of generation are more, so as to realize the pressure sensitivity touch function of In-cell touch panel by detecting by electric current that the positive charge of positive electrode and the negative electrical charge of negative electrode are formed.
Description
Technical Field
The invention relates to the technical field of display, in particular to an embedded touch screen and a display device.
Background
The pressure sensing technology is a technology capable of detecting external stress, and the technology is applied to the fields of industrial control, medical treatment and the like for a long time. At present, the pressure sensing technology is applied to the display field through a proper scheme so as to realize the pressure sensing touch function of the display device, the detection precision of the display device can be improved, and the display device with the pressure sensing touch function can enable a customer to obtain better human-computer interaction experience, so that the competitiveness of a product is improved. Therefore, how to implement the pressure-sensitive touch function for the display device is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides an embedded touch screen and a display device, which are used for realizing the touch screen with a pressure-sensitive touch function.
Therefore, an embodiment of the present invention provides an in-cell touch screen, including: the array substrate and the opposite substrate that set up relatively still include: a plurality of mutually independent pressure-sensitive touch units between the array substrate and the opposite substrate; wherein,
the pressure-sensitive touch unit includes: the piezoelectric sensor comprises a piezoelectric sensing layer, and a positive electrode and a negative electrode which are connected with the piezoelectric sensing layer and are arranged at intervals; the pressure-sensitive touch unit is used for enabling the positive electrode and the negative electrode to generate electric charges when the piezoelectric induction layer deforms under the action of pressure, and the larger the deformation is, the more the generated electric charges are.
Preferably, in the in-cell touch screen provided by the embodiment of the present invention, the piezoelectric sensing layer is made of a piezoelectric fiber composite material;
the positive electrode includes: the piezoelectric induction layer is arranged on the side, facing the opposite substrate, of the piezoelectric induction layer, and the piezoelectric induction layer is arranged on the opposite substrate;
the negative electrode includes: the first negative sub-electrodes are arranged on one side, facing the opposite substrate, of the piezoelectric induction layer and correspond to the first positive sub-electrodes one to one, and the second negative sub-electrodes are arranged on one side, away from the opposite substrate, of the piezoelectric induction layer and are symmetrical to the first negative sub-electrodes;
the first positive sub-electrode and the corresponding first negative sub-electrode form an interdigitated electrode, and the second positive sub-electrode and the corresponding second negative sub-electrode form an interdigitated electrode.
Preferably, in the in-cell touch screen provided in the embodiment of the present invention, the first positive sub-electrode and the first negative sub-electrode are made of the same material at the same layer; and/or the presence of a gas in the gas,
the second positive sub-electrode and the second negative sub-electrode are made of the same material at the same layer.
Preferably, in the in-cell touch screen provided by the embodiment of the present invention, the first positive sub-electrode is made of a transparent conductive material; and/or the material of the second positive sub-electrode is a transparent conductive material.
Preferably, the in-cell touch screen provided by the embodiment of the present invention further includes: a black matrix layer between the array substrate and the opposite substrate;
the orthographic projection of the black matrix layer on the opposite substrate covers the orthographic projection of each pressure-sensitive touch unit on the opposite substrate.
Preferably, the in-cell touch screen provided by the embodiment of the present invention further includes: the pressure-sensitive touch control device comprises positive electrode leads correspondingly connected with positive electrodes in the pressure-sensitive touch control units, negative electrode leads correspondingly connected with negative electrodes in the pressure-sensitive touch control units, and pressure-sensitive detection chips connected with the positive electrode leads and the negative electrode leads;
the pressure-sensitive detection chip is used for judging a touch position by detecting the change of the current of the positive electrode lead and the negative electrode lead corresponding to each pressure-sensitive touch unit when the pressure-sensitive touch units are pressed, and judging the pressure of the touch position by detecting the current of the positive electrode lead and the negative electrode lead corresponding to the touch position.
Preferably, in the in-cell touch screen provided by the embodiment of the present invention, each positive electrode wire is made of a transparent conductive material; and/or the material of each negative electrode lead is a transparent conductive material.
Preferably, the in-cell touch screen provided by the embodiment of the present invention further includes: the liquid crystal layer is positioned between the array substrate and the opposite substrate;
each pressure-sensitive touch unit is positioned between the opposite substrate and the liquid crystal layer.
Preferably, the in-cell touch screen provided by the embodiment of the present invention further includes: a plurality of pixel units located between the opposite substrate and the array substrate,
the area surrounded by the orthographic projection of each pressure-sensitive touch unit on the opposite substrate covers the orthographic projection of at least one pixel unit on the opposite substrate.
Correspondingly, the embodiment of the invention also provides a display device which comprises any one of the embedded touch screens provided by the embodiment of the invention.
According to the embedded touch screen and the display device provided by the embodiment of the invention, when the embedded touch screen is pressed, the piezoelectric sensing layer has the piezoelectric effect, when the embedded touch screen is deformed under the action of pressure, such as bending, positive charges can be generated at the position of the positive electrode, negative charges can be generated at the position of the negative electrode, and the more the deformation is, the more the generated positive charges and negative charges are, so that the pressure-sensitive touch function of the embedded touch screen can be realized by detecting the current formed by the positive charges of the positive electrode and the negative charges of the negative electrode.
Drawings
FIG. 1a is a schematic top view of an in-cell touch screen according to an embodiment of the invention;
FIG. 1b is a second schematic diagram illustrating a top view of an in-cell touch screen according to an embodiment of the invention;
FIG. 2a is a schematic cross-sectional view of the in-cell touch screen of FIG. 1a taken along the direction A-A';
FIG. 2B is a cross-sectional view of the in-cell touch screen of FIG. 1a taken along the direction B-B';
fig. 3 is a schematic diagram of the structure of a piezoelectric fiber composite and interdigital electrodes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of an in-cell touch screen and a display device according to embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The thickness and shape of the various layers in the drawings do not reflect the true scale of an in-cell touch screen and are intended to be illustrative only of the present invention.
As shown in fig. 1a and 1b, an in-cell touch screen according to an embodiment of the present invention includes: the array substrate and the opposite substrate that set up relatively to and still include: a plurality of pressure-sensitive touch units 300 independent of each other between the array substrate and the opposite substrate; wherein,
the pressure-sensitive touch unit 300 includes: the piezoelectric sensing layer 310, and a positive electrode 320 and a negative electrode 330 which are connected with the piezoelectric sensing layer 310 and are arranged at intervals; the pressure-sensitive touch unit 300 is used for generating charges on the positive electrode 320 and the negative electrode 330 when the piezoelectric sensing layer 310 is deformed by pressure, and the larger the deformation is, the more the charges are generated.
According to the embedded touch screen provided by the embodiment of the invention, when the embedded touch screen is pressed, the piezoelectric sensing layer has the piezoelectric effect, and when the embedded touch screen is deformed under the action of pressure, for example, the embedded touch screen is bent, positive charges can be generated at the position of the positive electrode, negative charges can be generated at the position of the negative electrode, and the more the deformation is, the more the positive charges and the negative charges are generated, so that the pressure-sensitive touch function of the embedded touch screen can be realized by detecting the current formed by the positive charges of the positive electrode and the negative charges of the negative electrode.
In general, the touch density of the in-cell touch screen is usually on the millimeter level, the touch density of each pressure-sensitive touch unit is on the millimeter level, and the display density of the pixel units of the display screen is usually on the micrometer level, so that one pressure-sensitive touch unit can correspond to a plurality of pixel units, and in particular, in the in-cell touch screen provided by the embodiment of the present invention, as shown in fig. 1a and 1b, further includes a plurality of pixel units 400 located between the opposite substrate and the array substrate,
the area surrounded by the orthographic projection of each pressure-sensitive touch unit 300 on the opposite substrate covers the orthographic projection of at least one pixel unit 400 on the opposite substrate, wherein fig. 1a exemplifies that the area surrounded by the orthographic projection of each pressure-sensitive touch unit 300 on the opposite substrate covers the orthographic projection of two pixel units 400 on the opposite substrate, and fig. 1b exemplifies that the area surrounded by the orthographic projection of each pressure-sensitive touch unit 300 on the opposite substrate covers the orthographic projection of five pixel units 400 on the opposite substrate. In practical applications, the density and the occupied area of each pressure-sensitive touch unit can be selected according to the actually required pressure-sensitive touch density to ensure the required touch precision, which is not limited herein.
Specifically, in the embedded touch screen provided in the embodiment of the present invention, each pressure-sensitive touch unit may be located on a side of the opposite substrate facing the array substrate; alternatively, each pressure-sensitive touch unit may be located on a side of the array substrate facing the opposite substrate, which is not limited herein.
Specifically, in the embedded touch screen provided by the embodiment of the invention, as shown in fig. 1a, fig. 2a and fig. 2B, wherein fig. 2a is a schematic cross-sectional structure of the embedded touch screen shown in fig. 1a along a-a 'direction, fig. 2B is a schematic cross-sectional structure of the embedded touch screen shown in fig. 1a along B-B' direction, and the piezoelectric sensing layer 310 is made of a piezoelectric fiber composite material;
the positive electrode 320 includes: at least one first positive sub-electrode 321 disposed on a side of the piezoelectric sensing layer 310 facing the opposite substrate 200, and a second positive sub-electrode 322 disposed on a side of the piezoelectric sensing layer 310 facing away from the opposite substrate 200 and symmetrically disposed with the first positive sub-electrode 321;
the negative electrode 330 includes: the first negative sub-electrodes 331 are arranged on one side of the piezoelectric sensing layer 310 facing the opposite substrate 200 and correspond to the first positive sub-electrodes 321, and the second negative sub-electrodes 332 are arranged on one side of the piezoelectric sensing layer 310 away from the opposite substrate 200 and are symmetrical to the first negative sub-electrodes 331;
the first positive sub-electrode 321 and the corresponding first negative sub-electrode 331 constitute an interdigital electrode 340, and the second positive sub-electrode 322 and the corresponding second negative sub-electrode 332 constitute an interdigital electrode 340.
Specifically, in the embedded touch screen provided by the embodiment of the invention, when the positive electrode in one pressure-sensitive touch unit includes a plurality of first positive sub-electrodes, that is, in one pressure-sensitive touch unit, a plurality of interdigital electrodes are disposed on the same side of the piezoelectric sensing layer, as shown in fig. 1a, each interdigital electrode may be located between adjacent columns of pixel units or between adjacent rows of pixel units.
Specifically, in the embedded touch panel provided by the embodiment of the invention, when the positive electrode in one pressure-sensitive touch unit includes a first positive sub-electrode, that is, in one pressure-sensitive touch unit, an interdigital electrode is disposed on the same side of the piezoelectric sensing layer, as shown in fig. 1b, and the interdigital electrode is located between adjacent rows of pixel units and between adjacent columns of pixel units.
In specific implementation, in the in-cell touch screen provided in the embodiment of the present invention, as shown in fig. 2a to 3, the piezoelectric fiber composite material includes piezoelectric fibers 311 arranged in parallel and a polymer 312 coated outside the piezoelectric fibers 311. The piezoelectric fiber 311 is polarized in advance, the interdigital electrode 340 composed of the positive electrode finger portions 341 and the negative electrode finger portions 342 arranged alternately perpendicular to the extending direction of the piezoelectric fiber 311 can be used not only as the working electrode of the piezoelectric fiber 311, but also as the polarization electrode of the piezoelectric fiber 311, and in the polarization process, the piezoelectric fiber 311 is polarized by applying a voltage of 4000V/mm to the silicone oil, so that the polarization direction p of the piezoelectric fiber 311 is along the axial direction thereof. The polymer 312 has the function of transmitting stress, fixing and protecting the piezoelectric fibers.
Specifically, in the embedded touch screen provided by the embodiment of the invention, the positive electrode finger parts and the negative electrode finger parts constituting the same interdigital electrode are arranged at equal intervals.
Specifically, in the embedded touch panel provided in the embodiment of the invention, as shown in fig. 2a, the first positive sub-electrode 321 and the first negative sub-electrode 331 are made of the same material in the same layer. Thus, the first positive sub-electrode 321 and the first negative sub-electrode 331 can be patterned by one-step patterning process, so that the preparation process flow can be simplified, the production cost can be saved, and the production efficiency can be improved.
Alternatively, in a specific implementation, in the in-cell touch screen provided in the embodiment of the invention, as shown in fig. 2a, the second positive sub-electrode 322 and the second negative sub-electrode 332 are made of the same material in the same layer. Thus, the patterns of the second positive sub-electrode 322 and the second negative sub-electrode 332 can be formed by one-time composition process, so that the preparation process flow can be simplified, the production cost can be saved, and the production efficiency can be improved.
Preferably, in the embedded touch panel provided in the embodiment of the invention, as shown in fig. 2a, the first positive sub-electrode 321 and the first negative sub-electrode 331 are made of the same material in the same layer, and the second positive sub-electrode 322 and the second negative sub-electrode 332 are made of the same material in the same layer. In this way, the patterns of the first positive sub-electrode 321 and the first negative sub-electrode 331 can be formed by one-time composition process, and the patterns of the second positive sub-electrode 322 and the second negative sub-electrode 332 can be formed by one-time composition process, that is, the pattern of the sub-electrode located on the side of the piezoelectric sensing layer 310 facing the opposite substrate 200 and the pattern of the sub-electrode located on the side of the piezoelectric sensing layer 310 away from the opposite substrate 200 can be formed by only two-time composition process, so that the preparation process flow can be simplified, the production cost can be saved, and the production efficiency can be improved.
Specifically, in the embedded touch screen provided in the embodiment of the invention, a material of the first positive sub-electrode may be a transparent conductive material, for example, an Indium Tin Oxide (ITO) material, an Indium Zinc Oxide (IZO) material, a carbon nanotube, graphene, or the like. The material of the first positive sub-electrode may also be a metal material, and is not limited herein.
Alternatively, in a specific implementation, in the embedded touch screen provided in the embodiment of the invention, a material of the second positive sub-electrode may be a transparent conductive material, for example, an Indium Tin Oxide (ITO) material, an Indium Zinc Oxide (IZO) material, a carbon nanotube, graphene, or the like. Of course, the material of the second positive sub-electrode may also be a metal material, and is not limited herein.
Preferably, in a specific implementation manner, in the in-cell touch screen provided in the embodiment of the invention, the material of the first positive sub-electrode is a transparent conductive material, and the material of the second positive sub-electrode is a transparent conductive material, for example, the material may be an Indium Tin Oxide (ITO) material, an Indium Zinc Oxide (IZO) material, a carbon nanotube, or graphene. Thus, the materials of the first positive sub-electrode, the second positive sub-electrode, the first negative sub-electrode and the second negative sub-electrode can be unified, and the processes for preparing the first positive sub-electrode, the second positive sub-electrode, the first negative sub-electrode and the second negative sub-electrode can be unified.
Specifically, in a specific implementation, in the in-cell touch screen provided in an embodiment of the present invention, as shown in fig. 2a and 2b, the in-cell touch screen further includes: a black matrix layer 500 between the array substrate 100 and the opposite substrate 200;
the orthographic projection of the black matrix layer 500 on the opposite substrate 200 covers the orthographic projection of each pressure-sensitive touch unit 300 on the opposite substrate 200. Therefore, the pressure-sensitive touch unit does not occupy the opening area of the pixel unit, and the opening ratio of the pixel unit is not affected.
Specifically, in a specific implementation, in the in-cell touch screen provided in an embodiment of the present invention, as shown in fig. 1a and 1b, the in-cell touch screen further includes: a positive electrode lead 350 connected to a positive electrode in each pressure-sensitive touch unit 300, a negative electrode lead 360 connected to a negative electrode in each pressure-sensitive touch unit 300, and a pressure-sensitive detection chip (not shown) connected to each positive electrode lead 350 and each negative electrode lead 360;
the pressure-sensitive detection chip is used for determining a touch position by detecting changes in current of the positive electrode lead 350 and the negative electrode lead 360 corresponding to each pressure-sensitive touch unit 300 when the pressure-sensitive touch unit 300 is pressed, and for determining a magnitude of pressure at the touch position by detecting magnitudes of current of the positive electrode lead 350 and the negative electrode lead 360 corresponding to the touch position. Thus, by adding the pressure sensing detection chip, the touch position can be determined by detecting the change of the current of each positive electrode lead 350 and each negative electrode lead 360, and the pressure at the touch position can be determined by detecting the magnitude of the current of the positive electrode lead 350 and the negative electrode lead 360 corresponding to the touch position.
Specifically, in the embedded touch screen provided by the embodiment of the invention, as shown in fig. 1a and 1b, the orthographic projection of the black matrix 500 on the opposite substrate covers the orthographic projection of each positive electrode lead 350 and each negative electrode lead 360 on the opposite substrate. This allows each positive electrode lead 350 and each negative electrode lead 360 not to occupy the opening area of the pixel cell, thereby not affecting the aperture ratio of the pixel cell.
Specifically, in the embedded touch screen provided by the embodiment of the invention, the material of each positive electrode wire is a transparent conductive material. For example, Indium Tin Oxide (ITO) material, Indium Zinc Oxide (IZO) material, carbon nanotube, graphene, or the like may be used. Of course, the material of each positive electrode lead may also be a metal material, and is not limited herein.
Or, in a specific implementation manner, in the embedded touch screen provided in the embodiment of the present invention, the material of each negative electrode wire is a transparent conductive material. For example, Indium Tin Oxide (ITO) material, Indium Zinc Oxide (IZO) material, carbon nanotube, graphene, or the like may be used. Of course, the material of each negative electrode lead may also be a metal material, and is not limited herein.
Preferably, in an implementation manner of the embedded touch screen provided by the embodiment of the invention, the material of each positive electrode lead is a transparent conductive material, and the material of each negative electrode lead is a transparent conductive material. For example, Indium Tin Oxide (ITO) material, Indium Zinc Oxide (IZO) material, carbon nanotube, graphene, or the like may be used. Of course, the material of the second positive sub-electrode may also be a metal material, and is not limited herein. This makes it possible to unify the material of each positive electrode lead and the material of each negative electrode lead.
Specifically, in a specific implementation, in the in-cell touch screen provided in an embodiment of the present invention, as shown in fig. 2a and 2b, the in-cell touch screen further includes: a liquid crystal layer 600 between the array substrate 100 and the opposite substrate 200;
each pressure-sensitive touch unit 300 is located between the opposite substrate 200 and the liquid crystal layer 600. Therefore, when the embedded touch screen is a liquid crystal display touch screen, the pressure-sensitive touch unit can be deformed more easily.
Specifically, in the in-cell touch screen provided by the embodiment of the invention, when the in-cell touch screen includes the liquid crystal layer 600 between the array substrate 100 and the opposite substrate 200, as shown in fig. 2a, a plurality of spacers 700 are further included between each pressure-sensitive touch unit 300 and the array substrate 100.
In a specific implementation, in the in-cell touch panel provided in the embodiment of the present invention, each spacer may be located on a side of the opposite substrate facing the liquid crystal layer; alternatively, the spacers may be located on the side of the array substrate facing the liquid crystal layer, and are not limited herein.
Further, when the spacers are located on the liquid crystal layer facing side of each pressure-sensitive touch unit, in order to avoid the height difference between the surfaces of the pressure-sensitive touch units being different during the manufacturing process, thereby causing a step difference in the same plane, in the in-cell touch screen provided in the embodiment of the present invention, as shown in fig. 2a and fig. 2b, the method further includes: a planarization layer 800 located between each pressure-sensitive touch unit 300 (shown only in fig. 2 a) and each spacer 700.
Specifically, in a specific implementation, in the in-cell touch screen provided in an embodiment of the present invention, the in-cell touch screen further includes: and a color photoresist layer of multiple colors between the array substrate and the opposite substrate.
The method for manufacturing the in-cell touch panel shown in fig. 2a is described as an example. The following description is given by taking an example in which the pressure-sensitive touch unit is located on a side of the opposite substrate facing the array substrate, but the invention is not limited thereto.
Specifically, in practical implementation, the manufacturing method for forming the opposite substrate with the pressure-sensitive touch unit may specifically include the following steps:
(1) a pattern of a black matrix layer is formed on a substrate.
(2) And forming at least one pattern of a first positive sub-electrode and a pattern of a first negative sub-electrode of an interdigital electrode with the first positive sub-electrode in an area corresponding to each pressure-sensitive touch unit on the black matrix layer.
(3) A pattern of pre-polarized piezoelectric fiber composite material is formed on the first positive sub-electrode and the first negative sub-electrode.
(4) And forming a pattern of second positive sub-electrodes arranged symmetrically to the first positive sub-electrodes and a pattern of second negative sub-electrodes arranged symmetrically to the first negative sub-electrodes on the piezoelectric fiber composite material.
(5) Patterns of color resist layers of a plurality of colors are formed on the base substrate, respectively.
(6) A planarization layer is formed on a base substrate on which color resist layers of a plurality of colors are formed.
(7) A pattern of spacers is formed on a base substrate on which a planarization layer is formed.
Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises any one of the embedded touch screens provided by the embodiment of the invention. The principle of the display device to solve the problems is similar to the in-cell touch screen, so the implementation of the display device can be referred to the implementation of the in-cell touch screen, and repeated details are not repeated herein.
In specific implementation, the display device provided in the embodiment of the present invention may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention. The implementation of the display device can be referred to the embodiment of the in-cell touch screen, and repeated details are not repeated.
According to the embedded touch screen and the display device provided by the embodiment of the invention, when the embedded touch screen is pressed, the piezoelectric sensing layer has the piezoelectric effect, when the embedded touch screen is deformed under the action of pressure, such as bending, positive charges can be generated at the position of the positive electrode, negative charges can be generated at the position of the negative electrode, and the more the deformation is, the more the generated positive charges and negative charges are, so that the pressure-sensitive touch function of the embedded touch screen can be realized by detecting the current formed by the positive charges of the positive electrode and the negative charges of the negative electrode.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. An in-cell touch screen, comprising: array substrate and the subtend base plate of relative setting, its characterized in that still includes: the array substrate and the opposite substrate are arranged in a same plane, and the array substrate and the opposite substrate are arranged in a same plane; wherein,
the pressure-sensitive touch unit includes: the piezoelectric sensor comprises a piezoelectric sensing layer, and a positive electrode and a negative electrode which are connected with the piezoelectric sensing layer and are arranged at intervals; the pressure-sensitive touch unit is used for generating charges on the positive electrode and the negative electrode when the piezoelectric induction layer deforms under the action of pressure, and the larger the deformation is, the more the generated charges are;
the orthographic projection of the black matrix layer on the opposite substrate covers the orthographic projection of each pressure-sensitive touch unit on the opposite substrate.
2. The in-cell touch screen of claim 1, wherein the piezoelectric sensing layer is made of a piezoelectric fiber composite;
the positive electrode includes: the piezoelectric induction layer is arranged on the side, facing the opposite substrate, of the piezoelectric induction layer, and the piezoelectric induction layer is arranged on the opposite substrate;
the negative electrode includes: the first negative sub-electrodes are arranged on one side, facing the opposite substrate, of the piezoelectric induction layer and correspond to the first positive sub-electrodes one to one, and the second negative sub-electrodes are arranged on one side, away from the opposite substrate, of the piezoelectric induction layer and are symmetrical to the first negative sub-electrodes;
the first positive sub-electrode and the corresponding first negative sub-electrode form an interdigitated electrode, and the second positive sub-electrode and the corresponding second negative sub-electrode form an interdigitated electrode.
3. The in-cell touch screen of claim 2, wherein the first positive sub-electrode and the first negative sub-electrode are of the same material in the same layer; and/or the presence of a gas in the gas,
the second positive sub-electrode and the second negative sub-electrode are made of the same material at the same layer.
4. The in-cell touch screen of claim 3, wherein the material of the first positive sub-electrode is a transparent conductive material; and/or the material of the second positive sub-electrode is a transparent conductive material.
5. The in-cell touch screen of any of claims 1-4, further comprising: the pressure-sensitive touch control device comprises positive electrode leads correspondingly connected with positive electrodes in the pressure-sensitive touch control units, negative electrode leads correspondingly connected with negative electrodes in the pressure-sensitive touch control units, and pressure-sensitive detection chips connected with the positive electrode leads and the negative electrode leads;
the pressure-sensitive detection chip is used for judging a touch position by detecting the change of the current of the positive electrode lead and the negative electrode lead corresponding to each pressure-sensitive touch unit when the pressure-sensitive touch units are pressed, and judging the pressure of the touch position by detecting the current of the positive electrode lead and the negative electrode lead corresponding to the touch position.
6. The in-cell touch screen of claim 5, wherein the positive electrode wires are made of a transparent conductive material; and/or the material of each negative electrode lead is a transparent conductive material.
7. The in-cell touch screen of any of claims 1-4, further comprising: the liquid crystal layer is positioned between the array substrate and the opposite substrate;
each pressure-sensitive touch unit is positioned between the opposite substrate and the liquid crystal layer.
8. The in-cell touch screen of any of claims 1-4, further comprising: a plurality of pixel units located between the opposite substrate and the array substrate,
the area surrounded by the orthographic projection of each pressure-sensitive touch unit on the opposite substrate covers the orthographic projection of at least one pixel unit on the opposite substrate.
9. A display device comprising the in-cell touch screen of any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610475290.4A CN105892757B (en) | 2016-06-24 | 2016-06-24 | A kind of In-cell touch panel and display device |
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| CN106445264B (en) * | 2016-08-31 | 2019-10-15 | 维沃移动通信有限公司 | A kind of calibration method and mobile terminal of touch control operation |
| CN106557205B (en) * | 2016-11-11 | 2019-11-05 | 京东方科技集团股份有限公司 | A kind of hand writing display device and preparation method thereof |
| CN108153020B (en) | 2018-01-02 | 2020-08-11 | 京东方科技集团股份有限公司 | Touch structure, touch panel and preparation method thereof, and touch display device |
| CN108375431B (en) * | 2018-02-26 | 2020-06-30 | 京东方科技集团股份有限公司 | Pressure detection circuit, pressure detection method, pressure detection module and display device |
| CN109326709B (en) * | 2018-10-10 | 2022-05-13 | 业成科技（成都）有限公司 | Sensing film, preparation method thereof and electronic device |
| CN109752618A (en) | 2019-03-22 | 2019-05-14 | 敦泰电子有限公司 | A kind of combination of touch screen detection chip and terminal device |
| CN114816037A (en) | 2021-01-27 | 2022-07-29 | 京东方科技集团股份有限公司 | Touch reproduction device, driving method thereof and touch reproduction device |
| CN113867563A (en) * | 2021-09-08 | 2021-12-31 | 维沃移动通信有限公司 | Electronic device, control method, apparatus, and readable storage medium |
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| CN102236463A (en) * | 2010-04-23 | 2011-11-09 | 英默森公司 | Transparent piezoelectric combined touch sensor and haptic actuator |
| CN102339166A (en) * | 2011-10-12 | 2012-02-01 | 清华大学 | Foldable and flexibly-deformable piezoelectric touch screen |
| CN102820422A (en) * | 2012-07-17 | 2012-12-12 | 北京大学 | Monolithic piezoelectric transducer and manufacturing method thereof |
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| US20150280102A1 (en) * | 2012-10-12 | 2015-10-01 | Kansai University | Piezoelectric element |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236463A (en) * | 2010-04-23 | 2011-11-09 | 英默森公司 | Transparent piezoelectric combined touch sensor and haptic actuator |
| CN102339166A (en) * | 2011-10-12 | 2012-02-01 | 清华大学 | Foldable and flexibly-deformable piezoelectric touch screen |
| CN102820422A (en) * | 2012-07-17 | 2012-12-12 | 北京大学 | Monolithic piezoelectric transducer and manufacturing method thereof |
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