Touch display panel, display device, and method for manufacturing touch display panel

Patent metadata

Field	Value
Publication number	US-12554158-B2
Application number	US-202318511990-A
Country	US
Kind code	B2
Filing date	Nov 16, 2023
Priority date	May 4, 2023
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A touch display panel includes an embedded touch liquid crystal display (LCD) module, a polarizer, and a cover plate. The embedded touch LCD module includes a non-filter window. The polarizer is disposed over the embedded touch LCD module and has a non-polarized window, a first vertical projection of the non-polarized window overlaps with a second vertical projection of the non-filter window, and the non-polarized window is filled with an optical clear material. The cover plate overlays the polarizer, and the optical clear material in the non-polarized window contacts the cover plate. The disclosure also provides a method for manufacturing the touch display panel and a display device including the touch display panel.

First claim

What is claimed is:

1 . A touch display panel comprising:
an embedded touch liquid crystal display (LCD) module, comprising: a thin film transistor layer, a touch layer on the thin film transistor layer, a color filter layer on the touch layer, and a color filter glass on the color filter layer, wherein a non-filter window passes through the color filter layer; a polarizer, disposed over the embedded touch LCD module, wherein the polarizer has a non-polarized window, a first vertical projection of the non-polarized window overlaps with a second vertical projection of the non-filter window, the polarizer comprises a polarizing layer, a first protective layer disposed under the polarizing layer, a second protective layer disposed over the polarizing layer, an optical clear material disposed under the first protective layer, and an optical clear adhesive layer disposed over the second protective layer, the polarizing layer, the first protective layer, the second protective layer, and the optical clear adhesive layer are removed in the non-polarized window, and the non-polarized window is filled with the optical clear material; and a cover plate, overlaying the polarizer, wherein the cover plate comprises a tempered ultra-thin glass, the tempered ultra-thin glass has a thickness less than 50 μm, the cover plate is free of triacetyl cellulose, a hardness of the tempered ultra-thin glass is greater than 7H of pencil hardness, a surface roughness of the cover plate is less than 1 nm, the polarizer and the cover plate have a total thickness less than 300 μm, and the optical clear material in the non-polarized window contacts the cover plate; wherein the optical clear adhesive layer is connected with the cover plate in an area outside the non-polarized window of the polarizer, and the optical clear material is connected with the embedded touch LCD module; wherein the polarizer is located between the color filter glass and the tempered ultra-thin glass and is attached to the color filter glass, and the optical clear material in the non-polarized window and the optical clear adhesive layer of the polarizer are flush with each other and both are directly attached to the cover plate.

2 . The touch display panel of claim 1 , wherein the cover plate has a thickness less than about 200 μm.

3 . The touch display panel of claim 1 , wherein the cover plate comprises a substrate layer and an optical layer, and the optical layer is an anti-reflection layer, an anti-glare layer, an anti-fouling layer, or a combination thereof.

4 . The touch display panel of claim 1 , wherein the optical clear material has a refractive index ranging from about 1.4 to about 1.7.

5 . The touch display panel of claim 1 , wherein the optical clear material includes an optical clear adhesive or an optical clear resin.

6 . The touch display panel of claim 1 , further comprising an infrared ink layer disposed under the embedded touch LCD module, wherein a third vertical projection of the infrared ink layer overlaps with the first vertical projection of the non-filter window and the second vertical projection of the non-polarized window.

7 . The touch display panel of claim 1 , wherein the touch display panel has a first side, a second side, a third side and a fourth side, and the embedded touch LCD module further comprises a terminal region located near the first side of the touch display panel, and in the second side, the third side and the fourth side, a plurality of respective edges of the embedded touch LCD module, the polarizer, and the cover plate are flush.

8 . The touch display panel of claim 7 , wherein in the first side, an edge of the embedded touch LCD module exceeds a corresponding edge of the cover plate and a corresponding edge of the polarizer.

9 . The touch display panel of claim 7 , wherein in the first side, an edge of the embedded touch LCD module is flush with a corresponding edge of the cover plate and a corresponding edge of the polarizer.

10 . A display device comprising:
the touch display panel of claim 1 ; and an optical module, disposed under the embedded touch LCD module, and a fourth vertical projection of the optical module overlaps with the first vertical projection of the non-filter window and the second vertical projection of the non-polarized window.

11 . A method for manufacturing a touch display panel, the method comprising:
receiving an initial polarizer, wherein the initial polarizer comprises a polarizing layer, a first protective layer disposed under the polarizing layer, a second protective layer disposed over the polarizing layer, and an optical clear adhesive layer disposed over the second protective layer; forming a through hole in the initial polarizer, wherein the through hole passes through the polarizing layer, the first protective layer, the second protective layer, and the optical clear adhesive layer; attaching the initial polarizer to a cover plate to form a first stack structure, wherein the optical clear adhesive layer is connected with the cover plate, wherein the cover plate comprises a tempered ultra-thin glass, the tempered ultra-thin glass has a thickness less than 50 μm, the cover plate is free of triacetyl cellulose, a hardness of the tempered ultra-thin glass is greater than 7H of pencil hardness, a surface roughness of the cover plate is less than 1 nm, and the initial polarizer and the cover plate have a total thickness less than 300 μm; trimming an edge of the first stack structure; applying an optical clear material on the initial polarizer of the first stack structure to form a second stack structure, wherein the optical clear material fills the through hole to form a non-polarized window; and attaching the second stack structure with an embedded touch LCD module to form a third stack structure, wherein the optical clear material is connected with the embedded touch LCD module, the embedded touch LCD module comprises: a thin film transistor layer, a touch layer on the thin film transistor layer, a color filter layer on the touch layer, and a color filter glass on the color filter layer, a non-filter window passes through the color filter layer, a position of the non-polarized window corresponds to the non-filter window, and the initial polarizer is located between the color filter glass and the tempered ultra-thin glass and is attached to the color filter glass, and the optical clear material in the non-polarized window and the optical clear adhesive layer of the initial polarizer are flush with each other and both are directly attached to the cover plate.

12 . The method for manufacturing the touch display panel of claim 11 , wherein the third stack structure has a first side, a second side, a third side and a fourth side, and the embedded touch LCD module has a terminal region near the first side of the third stack structure, and the method further comprises grinding edges of the second side, the third side and the fourth side of the third stack structure.

13 . The method for manufacturing the touch display panel of claim 11 , wherein the through hole is formed in the initial polarizer by punching or laser cutting.

14 . The touch display panel of claim 1 , wherein the tempered ultra-thin glass has a thickness ranging from about 25 μm to about 30 μm.

15 . The touch display panel of claim 1 , wherein the polarizer and the cover plate have the total thickness less than 150 μm.

16 . The method for manufacturing the touch display panel of claim 11 , wherein the tempered ultra-thin glass has a thickness ranging from about 25 μm to about 30 μm.

Assignees

• Interface Tech Chengdu Co Ltd
• Interface Optoelectronics Shenzhen Co Ltd
• General Interface Solution Ltd

Inventors

• Jen Chen-Ming

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02F2201/38

  Anti-reflection arrangements · CPC title

• G02F1/133502

  Antiglare, refractive index matching layers · CPC title

• G02F1/133331 Primary

  Cover glasses · CPC title