Polarizer and manufacturing method thereof, display panel and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12420504-B2
Application number	US-202017293687-A
Country	US
Kind code	B2
Filing date	Jul 28, 2020
Priority date	Jul 28, 2020
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

The present disclosure relates to the field of display technology, and provides a polarizer, a display panel, and a manufacturing method for the two. The method for manufacturing a polarizer comprises: providing a flat, semi-finished polarizing product comprising a linear polarizing sheet and a phase difference layer stacked over each other; providing an abutment comprising a supporting plane, wherein at least a portion of an edge of the supporting plane is provided with an accurate chamfer forming a supporting curved surface; fitting the semi-finished polarizing product onto a side of the supporting plane, wherein at least a portion of the supporting curved surface has an orthographic projection, positioned at an edge of the semi-finished polarizing product, in a plane where the semi-finished polarizing product is located; and applying a moist and heated gas to the edge of the semi-finished polarizing product to fit it onto a side of the supporting curved surface.

First claim

The invention claimed is:

1. A method for manufacturing a polarizer, comprising:
providing a flat polarizing product comprising a linear polarizing sheet and a phase difference layer stacked over each other, wherein the linear polarizing sheet comprises an iodine-based polarizing film using polyvinyl alcohol as base material;
providing an abutment comprising a supporting plane, wherein at least a portion of an edge of the supporting plane is provided with an arcuate chamfer, which arcuate chamfer forms a supporting curved surface;
fitting the polarizing product onto a side of the supporting plane, so that an orthographic projection of a second edge of the supporting curved surface in a plane where the supporting plane is located goes beyond an edge of the polarizing product, wherein the supporting curved surface comprises a first edge connected with a central portion of the supporting plane and the second edge opposite to the first edge; and
applying a moist and heated gas to the edge of the polarizing product so as to fit the edge of the polarizing product onto a side of the supporting curved surface.

2. The method for manufacturing a polarizer according to claim 1 , further comprising: while applying the moist and heated gas to the edge of the polarizing product, applying a force, in a direction facing the abutment, on a side of the polarizing product away from the abutment.

3. The method for manufacturing a polarizer according to claim 1 , further comprising:
before fitting the polarizing product onto the side of the supporting plane, forming a highly light-transmissive substrate on the abutment, wherein the highly light-transmissive substrate is fitted onto the supporting plane and the supporting curved surface; and
fitting the polarizing product onto the side of the supporting plane comprises: fitting the polarizing product onto a side of the highly light-transmissive substrate away from the supporting plane.

4. The method for manufacturing a polarizer according to claim 3 , further comprising: after applying the moist and heated gas to the edge of the polarizing product, peeling the highly light-transmissive substrate from the polarizing product after bending.

5. The method for manufacturing a polarizer according to claim 1 , wherein the moist and heated gas has a temperature from 35° C. to 85° C.

6. The method for manufacturing a polarizer according to claim 1 , wherein the moist and heated gas has a humidity from 50% rh to 95% rh.

7. The method for manufacturing a polarizer according to claim 1 , wherein the moist and heated gas is applied to the edge of the polarizing product for a time duration from 1 min to 60 min.

8. The method for manufacturing a polarizer according to claim 1 , wherein
the supporting plane is in a shape of rectangular and all the edge of the supporting plane is provided with an arcuate chamfer; and
the polarizing product is in a shape of rectangular, and after the polarizing product is fitted onto the side of the supporting plane, an orthographic projection of the supporting curved surface in a plane where the polarizing product is located is positioned around the polarizing product.

9. The method for manufacturing a polarizer according to claim 1 , wherein the polarizing product further comprises:
a first bonding layer located on a side of the phase difference layer away from the linear polarizing sheet;
a second bonding layer located between the phase difference layer and the linear polarizing sheet; and
a third bonding layer located on a side of the linear polarizing sheet away from the phase difference layer.

10. The method for manufacturing a polarizer according to claim 1 , wherein the polarizing product further comprises: a flexible substrate located on a side of the linear polarizing sheet away from the phase difference layer.

11. The method for manufacturing a polarizer according to claim 1 , wherein the phase difference layer comprises:
a quarter-wave plate having a slow axis which forms an angle of 2α+45° with relative to an absorption axis of the linear polarizing sheet; and
a half-wave plate having a slow axis which forms an angle of α with relative to the absorption axis of the linear polarizing sheet and an angle of α+45° with relative to the slow axis of the quarter-wave plate,
wherein α ranges from 14° to 16°.

12. A method for manufacturing a display panel, comprising:
forming a polarizer by;
providing a flat polarizing product comprising a linear polarizing sheet and a phase difference layer stacked over each other, wherein the linear polarizing sheet comprises an iodine-based polarizing film using polyvinyl alcohol as base material;
providing an abutment comprising a supporting plane, wherein at least a portion of an edge of the supporting plane is provided with an arcuate chamfer, which arcuate chamfer forms a supporting curved surface;
fitting the polarizing product onto a side of the supporting plane, so that an orthographic projection of a second edge of the supporting curved surface in a plane where the supporting plane is located goes beyond an edge of the polarizing product, wherein the supporting curved surface comprises a first edge connected with a central portion of the supporting plane and the second edge opposite to the first edge; and
applying a moist and heated gas to the edge of the polarizing product so as to fit the edge of the polarizing product onto a side of the supporting curved surface;

after applying the moist and heated gas to the edge of the polarizing product so as to form the polarizer, fitting the glass cover plate onto a side of the polarizer away from the abutment; and
fitting a combined structure, which combined structure is formed by fitting the polarizer and the glass cover plate, onto the flexible array substrate, wherein the glass cover plate is located on a side of the polarizer away from the flexible array substrate.

13. The method for manufacturing a display panel according to claim 12 , wherein the method for manufacturing a polarizer further comprises, while applying the moist and heated gas to the edge of the polarizing product, applying a force, in a direction facing the abutment, on a side of the polarizing product away from the abutment.

14. The method for manufacturing a display panel according to claim 12 , wherein the method for manufacturing a polarizer further comprises:
before fitting the polarizing product onto the side of the supporting plane, forming a highly light-transmissive substrate on the abutment, wherein the highly light-transmissive substrate is fitted onto the supporting plane and the supporting curved surface; and
fitting the polarizing product onto the side of the supporting plane comprises: fitting the polarizing product onto a side of the highly light-transmissive substrate away from the supporting plane.

15. The method for manufacturing a display panel according to claim 14 , wherein the method for manufacturing a polarizer further comprises, after applying the moist and heated gas to the edge of the polarizing product, peeling the highly light-transmissive substrate from the polarizing product after bending.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zhang Xiongnan
• Tsai Paoming
• Wang Haoran
• Yang Xuekai

Classifications

• B29D11/0073

  Optical laminates · CPC title

• B29D11/00384

  Local shaping by heating, e.g. local irradiation causing expansion · CPC title

• G02B5/3083

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title

• G02B5/305

  including organic materials, e.g. polymeric layers · CPC title

• G02B7/006

  Filter holders · CPC title