Liquid crystal display

• US 7,859,620 B2
• Filed: 04/21/2009
• Issued: 12/28/2010
• Est. Priority Date: 12/26/1997
• 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: Okamoto, Masayuki, Mitsui, Seiichi, Hiraki, Hajime
• Primary Examiner(s): Nguyen; Dung T
• Assistant Examiner(s): DUONG, TAI V
• Application Number:
  US12/427,449
• Publication Number:
  US 20090268135A1
• Time in Patent Office: 616 Days
• Field of Search: 349/106, 349/108, 349/109, 349/113, 349/114, 349/96, 345/88, 359/891
• US Class Current: 349/114
• CPC Class Codes: G02F 1/133371 Cells with varying thickness of the liquid crystal layer
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/133638 Waveplates, i.e. plates with a retardation value of lambda/n
• 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 2202/04 dye

Abstract

A liquid crystal display is furnished with: a liquid crystal display element having a pair of substrates, to which alignment members are provided to their respective opposing surfaces, and a liquid crystal layer sandwiched by the pair of substrates; an alignment mechanism for providing at least two different director configurations simultaneously on different arbitrary regions used for display in the liquid crystal layer; and a reflection film provided to at least one of the different arbitrary regions showing different director configurations; wherein the different arbitrary regions showing different director configurations are used for a reflection display section for showing reflection display and a transmission display section for showing transmission display, respectively. Examples of the alignment mechanism include an alignment film to which the alignment treatment is applied in different orientations in the reflection display section and transmission display section, respectively, an insulation film having different film thicknesses in the reflection display section and transmission display section, and so forth.

Claims

1. A liquid crystal display device comprising:

a pair of polarization plates;

a pair of substrates interposed between said polarization plates;

a liquid crystal layer interposed between said substrates;

a back light device provided adjacent to one of said polarization plates; and

a plurality of pixels;

some of said pixels each including a light reflecting display section and a light transmitting display section, wherein the light transmitting display section is without the light reflecting display section;

wherein at least one of said some of said pixels includes a light transmitting display section provided with a color filter, and includes a light reflecting display section that is without color filters.

2. The liquid crystal display device of claim 1, wherein

whole of the light reflecting display section of the at least one of said some of said pixels is without color filters.

3. The liquid crystal display device of claim 1, wherein

whole of the light reflecting display section of each said some of said pixels is without color filters.