Patterning phase difference plate, production method for patterning phase difference plate, 2D/3D switching type liquid crystal display panel, and 2D/3D switching type liquid crystal display unit

• US 7,773,179 B2
• Filed: 05/21/2009
• Issued: 08/10/2010
• Est. Priority Date: 09/26/2002
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Kojima, Akihiko, Matsumoto, Toshihiro
• Primary Examiner(s): Duong; Thoi V
• Application Number:
  US12/469,841
• Publication Number:
  US 20090262268A1
• Time in Patent Office: 446 Days
• Field of Search: 349/117, 349/15, 349/129, 349/187, 349/96
• US Class Current: 349/117
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/31 involving active parallax barriers involving directional light or back-light sources G02B30/33
• 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 1/13363 Birefringent elements, e.g. for optical compensation
• CPC Class Codes: G02F 1/133631 with a spatial distribution of the retardation value
• CPC Class Codes: G02F 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/13471 in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells G02F1/13475 takes precedence

Abstract

First rubbing is performed on an entire surface of an alignment film provided on a substrate, and then a mask part for masking a first region and a region of an alignment mark is formed on the alignment film by using a resist layer. After performing second rubbing on the alignment film through the mask part, the mask part is removed, and a liquid crystal layer is formed on the alignment film. In this way, the alignment mark is formed as a region having an optical function different from an optical function of a region surrounding the alignment mark. Thus, it is possible to produce a substrate having an alignment mark formed without increasing processing steps at such a position as to contact the liquid crystal layer.

Claims

1. A patterning phase difference plate, comprising:

an alignment film provided on a substrate material, the alignment film having a first alignment region and a second alignment region, the first alignment region and the second alignment region having different alignment directions;

a liquid crystal layer provided on the alignment film; and

an alignment mark for use in bonding the patterning phase difference plate to another member,

one of the first alignment region and the second alignment region being provided in the region of the alignment mark, the other of the first alignment region and the second alignment region being provided in the region surrounding the alignment mark.

2. A liquid crystal display panel, comprising:

a patterning phase difference plate used as a parallax barrier, the patterning phase difference plate including

an alignment film provided on a substrate material, the alignment film having a first alignment region and a second alignment region, the first alignment region and the second alignment region having different alignment directions;

a liquid crystal layer provided on the alignment film; and

an alignment mark for use in bonding the patterning phase difference plate to another member,

one of the first alignment region and the second alignment region being provided in the region of the alignment mark, the other of the first alignment region and the second alignment region being provided in the region surrounding the alignment mark.