CN-224203672-U - Touch display substrate

CN224203672UCN 224203672 UCN224203672 UCN 224203672UCN-224203672-U

Abstract

The embodiment of the utility model provides a touch display substrate, and relates to the technical field of touch display. The touch display substrate comprises a liquid crystal panel and a backlight module, wherein the liquid crystal panel comprises a touch sensor and a transparent shielding layer, the backlight module comprises a back plate, the transparent shielding layer is arranged between the touch sensor and the backlight module, the transparent shielding layer is not grounded, and the back plate is grounded. In the embodiment of the utility model, the transparent shielding layer is not grounded, the surface of the transparent shielding layer is an equipotential surface in an electric field, and the back plate is grounded, so that the potential between the transparent shielding layer and the back plate is unchanged all the time, even if the liquid crystal panel is deformed due to the pressing of a finger or a palm, the potential between the transparent shielding layer and the back plate is not changed, and therefore, no additional capacitance is generated to be collected by the touch sensor, and touch data of a diffusion part formed by the generated additional capacitance in the related art can be eliminated, thereby improving the sensitivity of a touch display product.

Inventors

WEI XIONGZHOU
ZHANG TAI
WANG BO
CAO QI
CHEN XIANG
ZHA CHANGJUN
LI MIN
PANG JIAQI
JIANG ZHISHENG
HAO YAJUAN

Assignees

重庆京东方光电科技有限公司
京东方科技集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20250530

Claims (11)

1. The utility model provides a touch-control display base plate which characterized in that, touch-control display base plate includes: A liquid crystal panel and a backlight module; the liquid crystal panel comprises a touch sensor and a transparent shielding layer, and the backlight module comprises a back plate; The transparent shielding layer is arranged between the touch sensor and the backlight module, the transparent shielding layer is not grounded, and the backboard is grounded.
2. The touch display substrate of claim 1, wherein, The backlight module further comprises a reflecting sheet, a light guide plate and a film, wherein the back plate comprises a first back plate part and a second back plate part; The liquid crystal panel also comprises a first polaroid, a first glass substrate, a liquid crystal layer, a second glass substrate and a second polaroid; the first backboard portion is arranged along the display plane direction of the touch display substrate, the second backboard portion is arranged along the thickness direction of the touch display substrate, the reflecting sheet is arranged on the first backboard portion, the light guide plate is arranged on one side of the reflecting sheet away from the first backboard portion, and the film is arranged on one side of the light guide plate away from the first backboard portion; The transparent shielding layer is arranged on one side of the first polaroid, which is far away from the first backboard portion, the first glass substrate is arranged on one side of the transparent shielding layer, which is far away from the first backboard portion, the touch sensor is arranged on one side of the first glass substrate, which is far away from the first backboard portion, the liquid crystal layer is arranged on one side of the touch sensor, which is far away from the first backboard portion, the second glass substrate is arranged on one side of the liquid crystal layer, which is far away from the first backboard portion, and the second polaroid is arranged on one side of the second glass substrate, which is far away from the first backboard portion.
3. The touch display substrate according to claim 2, wherein the second back plate portion extends from the first back plate portion to the film in a thickness direction of the touch display substrate.
4. The touch display substrate according to claim 2, wherein the second back plate portion extends from the first back plate portion to the second glass substrate in a thickness direction of the touch display substrate; the touch display substrate further comprises a first insulating adhesive tape, and the first insulating adhesive tape is arranged between the second backboard portion and the liquid crystal panel.
5. The touch display substrate of claim 1, further comprising a letter drop and a second insulating tape; In the display plane direction of the touch display substrate, the second insulating adhesive tape is arranged at the edge of the fan-out side of the liquid crystal panel, the Chinese character kou adhesive is arranged at the edge of three sides of the liquid crystal panel except the fan-out side, and the second insulating adhesive tape and the Chinese character kou adhesive are arranged between the liquid crystal panel and the backlight module.
6. The touch display substrate of claim 1, wherein a second projection falls within a first projection, wherein the first projection is a projection of the transparent shielding layer on the backlight module, and the second projection is a projection of the touch sensor on the backlight module.
7. The touch display substrate according to claim 2, wherein four corners of the first glass substrate near the transparent shielding layer are rounded corners, and four sides of the first glass substrate near the transparent shielding layer are C-corner sides.
8. The touch display substrate according to claim 7, wherein among four sides of the first glass substrate near the transparent shielding layer, a width of a C angle of a first side near a fan-out side is 800 μm to 1200 μm, and a width of C angles of three sides other than the first side is 100 μm to 500 μm.
9. The touch display substrate according to claim 2, wherein the thickness of the first glass substrate is greater than 0 and equal to or less than 0.4mm, and the thickness of the second glass substrate is greater than 0 and equal to or less than 0.4mm; Or alternatively, the first and second heat exchangers may be, The thickness of the first glass substrate is more than or equal to 0.4mm and less than or equal to 0.8mm, and the thickness of the second glass substrate is more than 0 and less than or equal to 0.4mm.
10. The touch display substrate of claim 1, further comprising an optical adhesive; the optical cement is arranged between the liquid crystal panel and the backlight module.
11. The touch display substrate of claim 1, wherein a distance between the touch sensor and the back plate is 2mm-2.4mm.

Description

Touch display substrate Technical Field The present disclosure relates to touch display technology, and in particular, to a touch display substrate. Background In cell (embedding Touch panel function into liquid crystal pixel) Touch screen technology cuts a Vcom electrode layer on a TFT (Thin Film Transistor ) substrate into independent small area electrodes, uses a single-layer self-capacitance technology to realize Touch function, and after the TFT substrate and a CF (Color Filter) substrate are oppositely pasted into a box, a Touch Sensor layer is located In the box, which is called an In cell. The In cell has the advantages of simple process, low cost, light weight, high light transmittance and the like, can be designed corresponding to a narrow-frame touch display product, and has wider application. However, in cells are designed to be self-capacitance, the capacitance value variation In the vertical direction of the Touch Sensor is collected by the Touch Sensor, after the In Cell product is pressed by a finger or a palm, OC (Open Cell, liquid crystal panel) is deformed, additional capacitance is generated between the Touch Sensor and the back plate, and after the capacitance is collected by the Touch Sensor, touch data of a diffusion part is formed, so that a real contact is submerged, and the sensitivity of a Touch display product is low. Disclosure of utility model The embodiment of the utility model aims to provide a touch display substrate so as to improve the sensitivity of a touch display product. The specific technical scheme is as follows: in a first aspect, an embodiment of the present utility model provides a touch display substrate, where the touch display substrate includes: A liquid crystal panel and a backlight module; the liquid crystal panel comprises a touch sensor and a transparent shielding layer, and the backlight module comprises a back plate; The transparent shielding layer is arranged between the touch sensor and the backlight module, the transparent shielding layer is not grounded, and the backboard is grounded. In one possible implementation of the method according to the invention, The backlight module further comprises a reflecting sheet, a light guide plate and a film, wherein the back plate comprises a first back plate part and a second back plate part; The liquid crystal panel also comprises a first polaroid, a first glass substrate, a liquid crystal layer, a second glass substrate and a second polaroid; the first backboard portion is arranged along the display plane direction of the touch display substrate, the second backboard portion is arranged along the thickness direction of the touch display substrate, the reflecting sheet is arranged on the first backboard portion, the light guide plate is arranged on one side of the reflecting sheet away from the first backboard portion, and the film is arranged on one side of the light guide plate away from the first backboard portion; The transparent shielding layer is arranged on one side of the first polaroid, which is far away from the first backboard portion, the first glass substrate is arranged on one side of the transparent shielding layer, which is far away from the first backboard portion, the touch sensor is arranged on one side of the first glass substrate, which is far away from the first backboard portion, the liquid crystal layer is arranged on one side of the touch sensor, which is far away from the first backboard portion, the second glass substrate is arranged on one side of the liquid crystal layer, which is far away from the first backboard portion, and the second polaroid is arranged on one side of the second glass substrate, which is far away from the first backboard portion. In one possible embodiment, the second back plate portion extends from the first back plate portion to the film in a thickness direction of the touch display substrate. In one possible embodiment, in a thickness direction of the touch display substrate, the second back plate portion extends from the first back plate portion to the second glass substrate; the touch display substrate further comprises a first insulating adhesive tape, and the first insulating adhesive tape is arranged between the second backboard portion and the liquid crystal panel. In one possible implementation manner, the touch display substrate further comprises a letter adhesive and a second insulating adhesive tape; In the display plane direction of the touch display substrate, the second insulating adhesive tape is arranged at the edge of the fan-out side of the liquid crystal panel, the Chinese character kou adhesive is arranged at the edge of three sides of the liquid crystal panel except the fan-out side, and the second insulating adhesive tape and the Chinese character kou adhesive are arranged between the liquid crystal panel and the backlight module. In one possible implementation, the second projection falls within a first projection, wherein the first pro