US 12,420,504 B2
Polarizer and manufacturing method thereof, display panel and manufacturing method thereof
Xiongnan Zhang, Beijing (CN); Paoming Tsai, Beijing (CN); Haoran Wang, Beijing (CN); and Xuekai Yang, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/293,687
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jul. 28, 2020, PCT No. PCT/CN2020/105249
§ 371(c)(1), (2) Date May 13, 2021,
PCT Pub. No. WO2022/021076, PCT Pub. Date Feb. 3, 2022.
Prior Publication US 2022/0305748 A1, Sep. 29, 2022
Int. Cl. B29D 11/00 (2006.01); G02B 5/30 (2006.01)
CPC B29D 11/00644 (2013.01) [B29D 11/00384 (2013.01); B29D 11/0073 (2013.01); G02B 5/305 (2013.01); G02B 5/3083 (2013.01)] 15 Claims
OG exemplary drawing
 
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.