Method for manufacturing phase retarder film

• US 9,304,240 B2
• Filed: 06/05/2015
• Issued: 04/05/2016
• Est. Priority Date: 02/04/2013
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Sung, Wen-Fang, Kao, Wang-Shuo, Chen, Chih-Wei
• Primary Examiner(s): KIM, RICHARD H
• Application Number:
  US14/731,969
• Publication Number:
  US 20150268397A1
• Time in Patent Office: 305 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: B05D 3/067 Curing or cross-linking the coating
• CPC Class Codes: B05D 5/06 to obtain multicolour or other optical effects B05D5/02 takes precedence
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: G02B 30/34 Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
• CPC Class Codes: G02B 5/3083 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 Class Codes: G02F 1/133631 with a spatial distribution of the retardation value
• CPC Class Codes: G03F 7/20 Exposure; Apparatus therefor photographic printing apparatus for making copies G03B27/00
• CPC Class Codes: H04N 13/337 using polarisation multiplexing
• CPC Class Codes: H04N 13/359 Switching between monoscopic and stereoscopic modes

Abstract

A method for manufacturing phase retarder film includes steps of providing a substrate; forming an alignment layer on the substrate, the alignment layer having at least a first phase region, at least a second phase region and at least a third phase region, the third phase region being disposed between the first phase region and the second phase region, and a phase retardation of the third phase region being different from phase retardations of the first phase region and the second phase region. The phase retardation of the first phase region is different from the phase retardation of the second phase region.

Claims

1. A method for manufacturing phase retarder film comprising:

providing a substrate;

forming an alignment layer on the substrate, the alignment layer having at least a first phase region, at least a second phase region and at least a third phase region, the third phase region being disposed between the first phase region and the second phase region, and a phase retardation of the third phase region being different from phase retardations of the first phase region and the second phase region;

wherein the phase retardation of the first phase region is different from the phase retardation of the second phase region, and the sum of the phase retardation of the first phase regions, the second phase regions and the third phase regions are zero.

2. The method according to claim 1, wherein the method of forming the alignment layer on the substrate comprises:

executing a first patterning process on the alignment layer to form the first phase region;

executing a second patterning process on the alignment layer to form the second phase region; and

executing a third patterning process on the alignment layer to form the third phase region.

3. The method according to claim 2, wherein each of the first patterning process, the second patterning process and the third patterning process is a lithography process.

4. The method according to claim 2, wherein each of the first patterning process, the second patterning process and the third patterning process is a rubbing process.

5. The method according to claim 1, further comprising:

forming a liquid crystal layer on the alignment layer, and the liquid crystal layer being aligned by the alignment layer; and

executing a curing process to cure the liquid crystal layer.

6. The method according to claim 5, wherein the curing process comprises a ultraviolet curing process or a thermo curing process.

7. The method according to claim 1, wherein a material of the substrate comprises triacetyl cellulose, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, or cyclo-olefin polymer.

8. The method according to claim 1, wherein the phase retardation of the first phase region is opposite to the phase retardation of the second phase region.