Touch substrate, display panel and display device

Abstract

The application provides a touch substrate, which comprises a substrate and a touch unit layer arranged on the substrate, the touch unit layer comprises a plurality of touch units arranged in multiple rows and multiple columns, each touch unit comprises an x touch subunit and a y touch subunit. The x touch subunit comprises a first capacitor and a first magnetic induction medium block arranged between electrodes of the first capacitor, and the y touch subunit comprises a second capacitor and a second magnetic induction medium block arranged between electrodes of the second capacitor. The first magnetic induction medium block and the second magnetic induction medium block are both made of a magnetic induction medium material, and the dielectric constant of the magnetic induction medium material changes with the change of an environmental magnetic field. The touch substrate provided by the application can locate the position of a finger only by sensing the biomagnetic field generated by the finger, and the finger does not need to contact the touch substrate during use, thereby improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of display devices, and more specifically, to a touch substrate, a display panel including the touch substrate, and a display device including the display panel. Background Technology

[0002] With the development of technology, touch display technology has received increasing attention. Touch display technology makes human-computer interaction more direct and improves the user experience of mobile terminals.

[0003] The principle of existing touch display devices is usually to arrange multiple electrode groups in an array in the display device. When the mobile phone is pressed on the surface of the touch display device, the capacitance between the two electrode plates in the electrode group at the touch position will change, thereby determining the touch position.

[0004] The present invention aims to provide a new touch substrate and display device. Summary of the Invention

[0005] The present invention aims to provide a new touch substrate that can locate the finger position simply by sensing the biomagnetic field generated by the finger.

[0006] To achieve the above objectives, as one aspect of the present invention, a touch substrate is provided, the touch substrate comprising a substrate and a touch unit layer disposed on the substrate, the touch unit layer comprising a plurality of touch units arranged in multiple rows and columns, each touch unit comprising an x ​​touch sub-unit and a y touch sub-unit.

[0007] The x-touch subunit is used to determine the coordinates of the touch point in the x-direction, and the y-touch subunit is used to determine the coordinates of the touch point in the y-direction;

[0008] The x-touch subunit includes a first capacitor and a first magnetic induction medium block located between the electrodes of the first capacitor. The y-touch subunit includes a second capacitor and a second magnetic induction medium block located between the electrodes of the second capacitor. Both the first magnetic induction medium block and the second magnetic induction medium block are made of magnetic induction medium material. The dielectric constant of the magnetic induction medium material changes with the magnetic field in the environment in which the magnetic induction medium material is located.

[0009] Preferably, the first capacitor includes a first x electrode and a second x electrode. The first x electrode is disposed on a first side of the first magnetic induction medium block at an angle to the substrate, and the second x electrode is disposed on a second side of the first magnetic induction medium block at an angle to the substrate. The first side and the second side are two opposite sides of the first magnetic induction medium block. The first x electrodes of all x touch sub-units in all touch units located in the same column are electrically connected to each other, and the second x electrodes of all x touch sub-units in all touch units located in the same column are electrically connected to each other.

[0010] Preferably, the second capacitor includes a first y electrode and a second y electrode. The first y electrode is disposed on a third side of the second magnetic induction medium block at an angle to the substrate, and the second y electrode is disposed on a fourth side of the second magnetic induction medium block at an angle to the substrate. The third side and the fourth side are two opposite sides of the second magnetic induction medium block.

[0011] The first y electrodes of the y-touch sub-units in all touch units located in the same row are electrically connected to each other, and the second y electrodes of the y-touch sub-units in all touch units located in the same row are electrically connected to each other.

[0012] Preferably, the magnetic induction medium material includes a photonic crystal material.

[0013] Preferably, the touch substrate further includes a photosensitive unit layer, which is disposed on the surface of the touch unit layer away from the substrate. The photosensitive unit layer includes a plurality of photosensitive units disposed one-to-one on the surface of the touch unit away from the substrate. Each photosensitive unit is provided with a photosensitive element, and the electrical signal passing through the photosensitive element can change with the intensity of the light signal irradiating the photosensitive film.

[0014] Preferably, the photosensitive element includes any one of a photodiode, a photoresistor, and a phototransistor.

[0015] As a second aspect of the present invention, a display panel is provided, including a display substrate and a touch substrate disposed on the light-emitting side of the display substrate, wherein the touch substrate is the aforementioned touch substrate.

[0016] As a third aspect of the present invention, a display device is provided, including a display panel, wherein the display panel is the display panel described above.

[0017] Preferably, the display device further includes a coordinate determination module, which is used to determine the coordinates of the touch point based on the signals output by the x-touch subunit and the y-touch subunit.

[0018] Preferably, the touch substrate is a touch substrate including a photosensitive unit layer, and the display device further includes a fingerprint recognition module, which is used to determine the fingerprint shape based on the signal output by the photosensitive element. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a touch unit in the touch substrate provided by the present invention;

[0021] Figure 2 This is a schematic diagram illustrating the principle of fingerprint recognition implemented on the touch substrate provided by the present invention;

[0022] Figure 3 yes Figure 2 Schematic diagram of region b in the diagram;

[0023] Figure 4 yes Figure 2 A schematic diagram of region a in the diagram;

[0024] Figure 5 This is a view of the touch substrate provided by the present invention in the display direction;

[0025] Figure 6 This is a schematic diagram of the display panel provided by the present invention;

[0026] Figure 7 This is a schematic diagram of the display device provided by the present invention.

[0027] Explanation of reference numerals in the attached figures

[0028] 10: Touch panel substrate; 100: Substrate substrate

[0029] 200: Touch unit; 210: x-touch subunit

[0030] 211: First magnetic induction medium block; 212: First x-electrode

[0031] 213: Second x-electrode; 220: Y-touch subunit

[0032] 221: Second magnetic induction medium block; 222: First y-electrode

[0033] 223: Second y-electrode; 300: Photosensitive unit

[0034] 400: Planarization layer 1: Display panel

[0035] 20: Display substrate 2: Coordinate determination module Detailed Implementation

[0036] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0037] The present invention aims to provide a novel touch substrate and display device. As one aspect of the present invention, a touch substrate 10 is provided, such as... Figures 1 to 3 As shown, the touch substrate 10 includes a substrate 100 and a touch unit layer disposed on the substrate 100. The touch unit layer includes a plurality of touch units 200 arranged in multiple rows and columns. Each touch unit 200 includes an x-touch sub-unit 210 and a y-touch sub-unit 220. The x-touch sub-unit 210 is used to determine the coordinates of the touch point in the x-direction, and the y-touch sub-unit 220 is used to determine the coordinates of the touch point in the y-direction, wherein:

[0038] The x-touch subunit 210 includes a first capacitor and a first magnetic induction dielectric block 211 located between the electrodes of the first capacitor, and the y-touch subunit 220 includes a second capacitor and a second magnetic induction dielectric block 221 located between the electrodes of the second capacitor. Both the first magnetic induction dielectric block 211 and the second magnetic induction dielectric block 221 are made of a magnetic induction dielectric material, and the dielectric constant of the magnetic induction dielectric material varies with the magnetic field in the environment in which the magnetic induction dielectric material is located.

[0039] It is readily understood that in this invention, when a finger approaches the touch unit 200, the biomagnetic field generated by the finger alters the magnetic field around the first magnetic induction medium block 211 and the second magnetic induction medium block 221, thereby changing the dielectric constant of the first magnetic induction medium block 211 and the second magnetic induction medium block 221. Since the first magnetic induction medium block 211 is located between the electrodes of the first capacitor, and the second magnetic induction medium block 221 is located between the electrodes of the second capacitor, when the dielectric constant of the first magnetic induction medium block 211 and the second magnetic induction medium block 221 changes, the capacitance of the first capacitor and the second capacitor will also change accordingly. Therefore, the position of the touch point can be detected by detecting the capacitance value, thus achieving a touch detection function.

[0040] The present invention provides a new touch substrate 10, which can locate the finger position by sensing the biomagnetic field generated by the finger. During use, the finger does not need to directly touch the touch substrate 10, thus improving the user experience.

[0041] This invention does not specifically limit how to use each x-touch sub-unit 210 to determine the coordinates of the touch point in the x-direction. As a preferred embodiment of this invention, for example... Figure 1As shown, the first capacitor includes a first x-electrode 212 and a second x-electrode 213. The first x-electrode 212 is disposed on a first side of the first magnetic induction medium block 211 at an angle to the substrate 100, and the second x-electrode 213 is disposed on a second side of the first magnetic induction medium block 211 at an angle to the substrate 100. The first side and the second side are two opposite sides of the first magnetic induction medium block 211. The first x-electrodes 212 of all x-touch sub-units 210 in all touch units 200 located in the same column are electrically connected to each other, and the second x-electrodes 213 of all x-touch sub-units 210 in all touch units 200 located in the same column are electrically connected to each other.

[0042] To facilitate the detection of capacitance changes between the electrodes of the first capacitor in each touch unit 200, this invention electrically connects the first x electrodes 212 of all x-touch sub-units 210 in the same column of touch units 200 to each other, and electrically connects the second x electrodes 213 of all x-touch sub-units 210 in the same column of touch units 200 to each other. At this time, multiple capacitors composed of the first x electrodes 212 and second x electrodes 213 in each touch unit 200 in the same column are connected in parallel. Only a potential difference needs to be input across the multiple parallel capacitors. When one touch unit 200 in the column is affected by the biomagnetic field generated by a finger, the capacitance between the first x electrodes 212 and second x electrodes 213 in that touch unit 200 changes, and the charge on the first x electrodes 212 and second x electrodes 213 in that touch unit 200 also changes, thereby allowing current to be detected across the multiple parallel capacitors. Finally, the column coordinates of the touch position can be determined based on the number of columns where the current is detected (which can be the column number of the touch unit 200 corresponding to the touch position, i.e., the x-coordinate).

[0043] Similarly, this invention does not specifically limit how the coordinates of the touch point in the x-direction are determined using each y-touch sub-unit 220. As a preferred embodiment of this invention, such as... Figure 1 As shown, the second capacitor includes a first y-electrode 222 and a second y-electrode 223. The first y-electrode 222 is disposed on a third side of the second magnetic induction medium block 221 at an angle to the substrate 100, and the second y-electrode 223 is disposed on a fourth side of the second magnetic induction medium block 221 at an angle to the substrate 100. The third side and the fourth side are two opposite sides of the second magnetic induction medium block 221. The first y-electrodes 222 of the y-touch sub-units 220 in all touch units 200 located in the same row are electrically connected to each other, and the second y-electrodes 223 of the y-touch sub-units 220 in all touch units 200 located in the same row are electrically connected to each other.

[0044] To facilitate the detection of capacitance changes between the electrodes of the second capacitor in each touch unit 200, this invention electrically connects the first y electrodes 222 of all y-touch sub-units 220 in the same row of touch units 200 to each other, and electrically connects the second y electrodes 223 of all y-touch sub-units 220 in the same row of touch units 200 to each other. At this time, multiple capacitors composed of the first y electrodes 222 and second y electrodes 223 in each touch unit 200 in the same row are connected in parallel. Only a potential difference needs to be input across the multiple parallel capacitors. When one touch unit 200 in the row is affected by the biomagnetic field generated by a finger, the capacitance between the first y electrodes 222 and second y electrodes 223 in that touch unit 200 changes, and the charge on the first y electrodes 222 and second y electrodes 223 in that touch unit 200 also changes, thereby allowing current to be detected across the multiple parallel capacitors. Finally, the row coordinates of the touch position can be determined based on the number of rows of the detected current (which can be the row number of the touch unit 200 corresponding to the touch position, i.e., the y-coordinate).

[0045] This invention does not specifically limit the directions of the first side, the second side, the third side, and the fourth side, nor the angles between each side and the substrate 100. To facilitate the arrangement of the connection lines between the electrodes in the touch substrate 10, preferably, as shown in... Figure 1 As shown, the first side and the second side are two opposite sides of the first magnetic induction medium block 211 along the row direction (i.e., the x direction in the figure); the third side and the fourth side are two opposite sides of the second magnetic induction medium block 221 along the column direction (i.e., the y direction in the figure).

[0046] The present invention does not specifically limit the materials of the first magnetic induction medium block 211 and the second magnetic induction medium block 221, as long as the materials can have different dielectric constants under different magnetic field environments. For example, as an optional embodiment of the present invention, the magnetic induction medium material includes a photonic crystal material.

[0047] Photonic crystals are novel optical microstructure materials whose dielectric constant and refractive index vary periodically with space. The inventors of this invention have discovered that photonic crystals can alter the spatial position of their internal materials under the influence of a magnetic field, thereby changing the material's dielectric constant and refractive index.

[0048] When the materials of the first magnetic induction medium block 211 and the second magnetic induction medium block 221 are photonic crystal materials, the present invention also provides a preferred scheme for realizing fingerprint recognition using the characteristics of photonic crystal materials, specifically:

[0049] like Figures 2 to 4As shown, the touch substrate 10 further includes a photosensitive unit layer, which comprises a plurality of photosensitive units 300 correspondingly disposed on the surface of the touch unit 200 facing away from the substrate 100. Each photosensitive unit 300 contains a photosensitive element, and the electrical signal passing through the photosensitive element can change with the intensity of the light signal illuminating the photosensitive film. It should be noted that the touch substrate 10 may also include detection lines for inputting and outputting electrical signals to the photosensitive elements.

[0050] In this invention, when the materials of the first magnetic induction medium block 211 and the second magnetic induction medium block 221 are photonic crystal materials, they can also be combined with the fingerprint detection circuit to realize the combination of touch function and fingerprint recognition function. When the finger surface is not covered on the touch substrate 10, the light from the backlight passes through the first magnetic induction medium block 211, the second magnetic induction medium block 221, and the photosensitive unit 300. At this time, the photosensitive element is irradiated by normal backlight light, so that the current passing through the photosensitive element is a normal current.

[0051] When the surface of a finger covers the touch substrate 10, light shines on the valleys of the fingerprint ( Figure 2 The backlight light at the location shown in region b) can freely exit the touch substrate 10, and the light intensity received by the photosensitive element remains unchanged. Therefore, the current passing through the photosensitive element is still a normal current; while the ridge of the fingerprint ( Figure 2 In the area covered by region a), the air medium outside the surface of the touch substrate 10 is replaced by the human body. At this time, due to the excessively high refractive index of the light-emitting surface material, the backlight light of a specific wavelength undergoes total internal reflection at the interface and shines on the photosensitive element again. At this time, the light intensity received by the photosensitive element increases, causing the current passing through the photosensitive element to be higher than the normal current value. At this time, it is only necessary to detect the current passing through the photosensitive element in the photosensitive unit 300 at each position to obtain the morphology of the fingerprint.

[0052] The touch substrate 10 provided by the present invention can not only combine touch function and fingerprint recognition function, but also realize the fingerprint recognition function through the principle of total internal reflection of light. Since there are no problems such as mutual interference and charge residue between light rays, it improves the signal-to-noise ratio and anti-interference ability of fingerprint recognition signal compared with existing capacitive and piezoelectric fingerprint recognition solutions.

[0053] The present invention does not specifically limit the specific structure of the photosensitive element. Optionally, the photosensitive element includes any one of a photodiode, a photoresistor, and a phototransistor.

[0054] The present invention does not specifically limit the filling material between the touch units 200 and between the photosensitive units 300, for example, such as Figure 2As shown, the touch substrate 10 also includes a planarization layer 400, which is made of a transparent material.

[0055] As a second aspect of the present invention, a display panel 1 is provided. For example... Figure 6 As shown, the display panel 1 includes a display substrate 20 and a touch substrate disposed on the light-emitting side of the display substrate, wherein the touch substrate is the touch substrate 10 described above.

[0056] The display panel 1 provided by the present invention can locate the finger position by sensing the biomagnetic field generated by the finger, and the finger does not need to touch the display panel 1 during use, which improves the user experience.

[0057] As a third aspect of the present invention, a display device is provided, the display device including the touch substrate 10 described above.

[0058] The display device provided by the present invention can locate the finger position by sensing the biomagnetic field generated by the finger, and the finger does not need to touch the touch board 10 during use, thus improving the user experience.

[0059] Preferably, such as Figure 7 As shown, the display device further includes a coordinate determination module 2, which is used to determine the coordinates of the touch point based on the signals output by the x touch sub-unit 210 and the y touch sub-unit 220.

[0060] It is easy to understand that the "output signal" here refers to the voltage change of each of the first and second capacitors. When the mobile phone is close to the touch unit 200 at the touch position, the voltage of both the first and second capacitors in the touch unit 200 at that position changes. At this time, the coordinates of the touch point can be obtained by determining the column coordinate (i.e., x-coordinate) of the changed first capacitor and the row coordinate (i.e., y-coordinate) of the changed second capacitor through the coordinate determination module 2.

[0061] When the touch unit 200 further includes a photosensitive unit 300, preferably, the display device further includes a fingerprint recognition module, which is used to determine the fingerprint shape based on the signal output by the photosensitive element.

[0062] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A touch substrate, comprising a substrate and a touch unit layer disposed on the substrate, the touch unit layer comprising a plurality of touch units arranged in a plurality of rows and a plurality of columns, characterized in that, Each touch unit includes an x-touch sub-unit and a y-touch sub-unit. The x-touch subunit is used to determine the coordinates of the touch point in the x-direction, and the y-touch subunit is used to determine the coordinates of the touch point in the y-direction; The x-touch subunit includes a first capacitor and a first magnetic induction medium block located between the electrodes of the first capacitor, and the y-touch subunit includes a second capacitor and a second magnetic induction medium block located between the electrodes of the second capacitor. Both the first magnetic induction medium block and the second magnetic induction medium block are made of magnetic induction medium material, and the dielectric constant of the magnetic induction medium material changes with the magnetic field in the environment in which the magnetic induction medium material is located. The first capacitor includes a first x electrode and a second x electrode. The first x electrode is disposed on a first side of the first magnetic induction medium block at an angle to the substrate, and the second x electrode is disposed on a second side of the first magnetic induction medium block at an angle to the substrate. The first side and the second side are two opposite sides of the first magnetic induction medium block. The first x electrodes of all x touch sub-units in all touch units located in the same column are electrically connected to each other, and the second x electrodes of all x touch sub-units in all touch units located in the same column are electrically connected to each other. The second capacitor includes a first y electrode and a second y electrode. The first y electrode is disposed on a third side of the second magnetic induction medium block at an angle to the substrate, and the second y electrode is disposed on a fourth side of the second magnetic induction medium block at an angle to the substrate. The third side and the fourth side are two opposite sides of the second magnetic induction medium block. The first y electrodes of the y-touch sub-units in all touch units located in the same row are electrically connected to each other, and the second y electrodes of the y-touch sub-units in all touch units located in the same row are electrically connected to each other. Neither the first magnetic induction medium block nor the second magnetic induction medium block has electrodes on its side surface parallel to the substrate. The magnetic induction medium material includes a photonic crystal material; The touch substrate further includes a photosensitive unit layer, which is disposed on the surface of the touch unit layer away from the substrate. The photosensitive unit layer includes a plurality of photosensitive units disposed one-to-one on the surface of the touch unit away from the substrate. Each photosensitive unit is provided with a photosensitive element, and the electrical signal passing through the photosensitive element can change with the intensity of the light irradiating the photosensitive element. 2.The touch substrate of claim 1, wherein, The photosensitive element includes any one of a photodiode, a photoresistor, and a phototransistor.

3. A display panel, comprising a display substrate and a touch substrate disposed at a light-outgoing side of the display substrate, characterized in that, The touch substrate is the touch substrate described in claim 1 or 2.

4. A display device comprising a display panel, characterized by The display panel is the display panel described in claim 3.

5. The display device according to claim 4, wherein The display device further includes a coordinate determination module, which is used to determine the coordinates of the touch point based on the signals output by the x-touch subunit and the y-touch subunit.

6. The display device according to claim 4 or 5, characterized in that, The display device further includes a fingerprint recognition module, which is used to determine the fingerprint shape based on the signal output by the photosensitive element.

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