Touch module, preparation method therefor, and display device

Patent metadata

Field	Value
Publication number	US-11941209-B2
Application number	US-202117630128-A
Country	US
Kind code	B2
Filing date	Apr 19, 2021
Priority date	Jun 24, 2020
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

Provides in the present disclosure are a touch module, a preparation method therefor, and a display device. The touch module is formed by means of attaching a polarizing function layer to a side of a touch function layer by a first bonding layer; attaching a cyclo olefin polymer (COP) film layer to another side of the touch function layer by a second bonding layer; and attaching a third bonding layer to a side, facing away from the second bonding layer, of the COP film layer.

First claim

What is claimed is:

1. A method for preparing a touch module, comprising:
attaching a polarizing function layer to a side of a touch function layer by a first bonding layer;
attaching a cyclo olefin polymer (COP) film layer to another side of the touch function layer by a second bonding layer; and
attaching a third bonding layer to a side, facing away from the second bonding layer, of the COP film layer;
wherein the attaching the polarizing function layer to the side of the touch function layer by the first bonding layer, and the attaching the COP film layer to another side of the touch function layer by the second bonding layer comprises:
directly attaching the first bonding layer on the polarizing function layer first; then directly transferring the touch function layer pre-formed on a rigid base substrate to the first bonding layer by means of transfer printing; and then directly attaching the COP film layer on the touch function layer through the second bonding layer;
or,
directly attaching the second bonding layer on the COP film layer first; then directly transferring the touch function layer pre-formed on a rigid base substrate to the second bonding layer by means of transfer printing; and then directly attaching the polarizing function layer on the touch function layer through the first bonding layer;

wherein before the transferring the touch function layer pre-formed on the rigid base substrate to the first bonding layer by means of transfer printing, the method further comprises: removing a preset area of the polarizing function layer; wherein after the touch function layer is transferred to the first bonding layer, neither the polarizing function layer nor the first bonding layer overlaps with a binding area of the touch function layer in a direction perpendicular to the touch function layer; and after the transferring the touch function layer pre-formed on the rigid base substrate to the first bonding layer by means of transfer printing, the method further comprises: binding a printed circuit board in the binding area of the touch function layer; and
wherein before the attaching the polarizing function layer on the touch function layer through the first bonding layer, the method further comprising: attaching the first bonding layer on the polarizing function layer; removing a preset area of the polarizing function layer and a preset area of the first bonding layer; wherein after the attaching the polarizing function layer on the touch function layer, neither the polarizing function layer nor the first bonding layer overlaps with a binding area of the touch function layer in a direction perpendicular to the touch function layer; and binding a printed circuit board in the binding area of the touch function layer.

2. The method according to claim 1 , wherein the method further comprises: a process of pre-forming the touch function layer on the rigid base substrate;
wherein the process of pre-forming the touch function layer on the rigid base substrate, comprises:
forming a transfer-printing support layer on the rigid base substrate; and
forming the touch function layer on the transfer-printing support layer.

3. The method according to claim 1 , before the COP film layer is attached to the second bonding layer, further comprising:
performing plasma treatment on a surface, to be attached to the second bonding layer, of the COP film layer.

4. The method according to claim 1 , before the COP film layer is attached to the third bonding layer, further comprising:
performing plasma treatment on a surface, to be attached to the third bonding layer, of the COP film layer.

5. A touch module, wherein the touch module is prepared by adopting the method according to claim 1 ; and
the touch module comprises: the polarizing function layer, the first bonding layer, the touch function layer, the second bonding layer, the COP film layer and the third bonding layer arranged successively in a stacked mode.

6. The touch module according to claim 5 , wherein neither the polarizing function layer nor the first bonding layer overlaps with a binding area of the touch function layer in a direction perpendicular to the touch function layer; and
the touch module further comprises a printed circuit board bound in the binding area of the touch function layer.

7. The touch module according to claim 6 , wherein an area of a preset area of the polarizing function layer is larger than or equal to an area of the binding area.

8. A display device, wherein the display device comprises a display panel and the touch module according to claim 5 arranged on a light emitting side of the display panel; and
the third bonding layer in the touch module is attached to the display panel.

9. The display device according to claim 8 , wherein the display device further comprises: a cover plate arranged on a side, facing away from the display panel, of the touch module; and
when the touch module comprises a printed circuit board, the display device further comprises a frame sealant filling between the cover plate and the printed circuit board.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Jiuzhen
• Zheng Meizhu
• Bian Lupeng
• Gao Biao
• Guo Zebang
• Zhang Xiongnan
• Shi Boyang
• Zhang Shengxing
• Cai Jian
• Xiang Dalin

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• B32B27/325

  comprising polycycloolefins · CPC title

• B32B37/02

  characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations · CPC title

• B32B2457/208

  Touch screens · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title