CN215954291U

CN215954291U - Capacitive touch screen and touch display module

Info

Publication number: CN215954291U
Application number: CN202122120085.5U
Authority: CN
Inventors: 彭嘉鑫; 杨秋强; 沈奕; 余荣; 吕岳敏; 孙楹煌
Original assignee: Shantou Goworld Display Plant Ii Co ltd; Shantou Goworld Display Co Ltd; Shantou Goworld Display Technology Co Ltd
Current assignee: Shantou Goworld Display Plant Ii Co ltd; Shantou Goworld Display Co Ltd; Shantou Goworld Display Technology Co Ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-03-04
Anticipated expiration: 2031-09-03

Abstract

The capacitive touch screen comprises a transparent substrate, a touch circuit layer and a permeability reducing layer, wherein the touch circuit layer is arranged on the inner side surface of the transparent substrate, and the permeability reducing layer covers the touch circuit layer. The touch display module comprises the capacitive touch screen and a display, the capacitive touch screen is bonded with the display through the periphery, and an air interlayer is reserved between the capacitive touch screen and the display. According to the capacitive touch screen and the touch display module, the touch display module can avoid a full lamination process, and meanwhile reflected light of an air interlayer can be reduced.

Description

Capacitive touch screen and touch display module

Technical Field

The utility model relates to a capacitive touch screen and a touch display module, and belongs to the technical field of touch.

Background

The capacitive touch screen is generally disposed in front of the flat or thin display to form a touch display module. In the existing touch display module, the air interlayer between the touch screen and the display screen is generally eliminated by full lamination, so that the reflection of the air interlayer to ambient light is reduced.

Disclosure of Invention

The utility model aims to provide a capacitive touch screen and a touch display module, wherein the touch display module can avoid a full lamination process and reduce reflected light of an air interlayer. The design scheme adopted is as follows:

a capacitive touch screen comprises a transparent substrate and a touch circuit layer arranged on the inner side surface of the transparent substrate, and is characterized in that: the touch control circuit layer is covered with a transparent layer.

Typically, the transparent substrate is a transparent glass substrate. The touch circuit layer generally includes a plurality of sensing electrodes, such as sensing electrodes made of a transparent conductive layer (e.g., an ITO film), and when the touch circuit layer is operated, the touch circuit layer can detect a touch event according to an influence of a finger on a capacitance of the sensing electrodes. The touch sensing circuit generally further includes circuit wires, such as metal wires (which may be patterned from a metal film) disposed on the glass substrate and external wires (such as FPC wires, which may be connected to the glass substrate via an anisotropic conductive adhesive). In order to improve the aesthetic property, the touch circuit layer may further include a shielding layer, which is generally disposed below the peripheral touch circuit layer and may be a light-shielding ink layer or a patterned photosensitive resin coating, and the shielding layer generally divides the touch screen into a shielding region (peripheral region) and a transparent window (middle region).

Preferably, the reduced-transmission layer is a translucent layer having a transmittance of 30-80%, in particular a translucent layer having a transmittance of 60-80%. Preferably, the thickness of the reduced-transmission layer is 1 μm-5 μm.

The anti-reflection layer is typically a patterned film layer, so that a space can be left at the external end of the touch circuit, and when the touch circuit layer includes a shielding layer, the shielding layer mainly shields the transparent wide opening and partially extends to the peripheral area. Preferably, the transmittance reducing layer is a photosensitive resin coating doped with a light absorbing substance, and the photosensitive resin coating can be coated on the inner side surface of the capacitive touch screen by a method such as extrusion coating (slit coating) and patterned by an exposure development method.

It is further preferred that the permeation reducing layer is a photosensitive resin coating layer doped with carbon particles, preferably carbon particles are nano carbon particles having a size of less than 400 μm, which has an advantage of high stability with pure black color. Further preferably, in order to avoid the influence of the conductivity of the carbon particles on the touch circuit layer, the capacitive touch screen further comprises a buffer layer, the buffer layer is arranged between the touch circuit layer and the transmittance reducing layer in a sandwiched manner, and is an insulating transparent layer, and particularly, the buffer layer may be a fully transparent patterned photosensitive resin coating.

In addition, it is also preferable that the permeation reducing layer is a photosensitive resin coating layer doped with dye molecules, and the dye molecules are not conductive and have no influence on the touch circuit layer.

The utility model also provides a touch display module which comprises the capacitive touch screen and a display, wherein the capacitive touch screen is bonded with the display through the periphery, and an air interlayer is reserved between the capacitive touch screen and the display. Preferably, the display is a mini-LED backlight liquid crystal display or a micro-LED display having a larger display brightness than a general flat panel display.

Therefore, the touch display module (such as the touch module) adopting the capacitive touch screen does not need to be completely attached, the air interlayer between the touch screen and the display screen can be reserved by adopting peripheral bonding (such as frame adhesive bonding), and ambient light needs to pass through the antireflection layer to be adsorbed twice when being reflected out through the air interlayer, so that the intensity of reflected light of the touch display module is greatly reduced.

Drawings

Fig. 1 is a schematic view of an appearance of a touch display module according to a first embodiment;

fig. 2 is a schematic structural composition diagram of a touch display module according to a first embodiment;

fig. 3 is a schematic cross-sectional structure view of a touch display module according to a first embodiment.

Detailed Description

Example one

As shown in fig. 1 to 3, the touch display module 100 includes a capacitive touch screen 10 and a display 20 attached to each other by a sealant 30, the display 20 is a mini-LED backlight lcd or a micro-LED display, and an air interlayer 31 is reserved between the touch screen 10 and the display 20.

The capacitive touch screen 10 comprises a transparent glass substrate 11 and a touch circuit layer 12 arranged on the inner side of the transparent substrate, wherein the touch circuit layer 12 comprises a black photosensitive resin coating 121 serving as a shielding layer, and the shielding layer 121 divides the touch screen 10 into a peripheral area 101 and a transparent window 102.

The capacitive touch screen 10 further includes a transmittance reducing layer 13 covering the touch circuit layer 12, wherein the transmittance reducing layer 13 is a 2 μm photosensitive resin coating layer doped with carbon particles having a particle size of less than 400 μm, and has a light transmittance of 50% through the carbon particles. The reduced-transmittance layer 13 is patterned by means of exposure and development to mainly shield the transparent window 102.

A buffer layer 14 is sandwiched between the permeability reducing layer 13 and the touch circuit layer 12, and is an insulating transparent patterned photosensitive resin coating.

When the ambient light L irradiates the touch display module 100, the intensity of the ambient light L is greatly reduced by two times of transmission and absorption of the transmittance reducing layer 13 when the ambient light L is reflected out through the air interlayer 31.

In other aspects of this embodiment, the transmittance of the reduced-transmittance layer 13 may be adjusted to another value of 30-80% by the concentration of the carbon particles.

In other embodiments of this embodiment, the carbon particles of the permeability-reducing layer 13 may be replaced by dye molecules, such as blue, violet, or mixed-black dye molecules.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and the equivalent or simple change of the structure, the characteristics and the principle described in the present patent idea is included in the protection scope of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. A capacitive touch screen comprises a transparent substrate and a touch circuit layer arranged on the inner side surface of the transparent substrate, and is characterized in that: the touch control circuit layer is covered with a transparent layer.

2. The capacitive touch screen of claim 1, wherein: the transmittance reducing layer is a translucent layer having a transmittance of 30% -80%.

3. The capacitive touch screen of claim 2, wherein: the transmittance reducing layer is a translucent layer having a transmittance of 60% -80%.

4. The capacitive touch screen of claim 1, wherein: the thickness of the reduced-permeability layer is 1 μm-5 μm.

5. The capacitive touch screen of claim 1, wherein: the permeability reducing layer is a patterning film layer.

6. The capacitive touch screen of claim 5, wherein: the light-absorbing layer is a photosensitive resin coating doped with a light-absorbing substance.

7. The capacitive touch screen of claim 6, wherein: the penetration reducing layer is a photosensitive resin coating doped with carbon particles.

8. The capacitive touch screen of claim 7, wherein: the carbon particles are nano-carbon particles with the size of less than 400 mu m.

9. The capacitive touch screen of claim 7, wherein: the capacitive touch screen further comprises a buffer layer, wherein the buffer layer is arranged between the touch circuit layer and the permeability reducing layer in a clamping mode and is an insulating transparent layer.

10. The capacitive touch screen of claim 9, wherein: the buffer layer is a fully transparent graphical photosensitive resin coating.

11. The capacitive touch screen of claim 6, wherein: the penetration reducing layer is a photosensitive resin coating doped with dye molecules.

12. A touch display module, it includes capacitive touch screen and display, characterized by: the capacitive touch screen is according to any one of claims 1 to 11, wherein the capacitive touch screen is bonded to the display through the periphery, and an air interlayer is reserved between the capacitive touch screen and the display.

13. The touch display module of claim 12, wherein: the display is a mini-LED backlight liquid crystal display or a micro-LED display.