Liquid crystal display

• US 20060119752A1
• Filed: 01/18/2006
• Published: 06/08/2006
• Est. Priority Date: 12/26/1997
• Status: Active Grant

• Current Assignee: Hajime Hiraki, Masayuki Okamoto, Seiichi Mitsui
• Original Assignee: Hajime Hiraki, Masayuki Okamoto, Seiichi Mitsui
• Inventors: Mitsui, Seiichi, Hiraki, Hajime, Okamoto, Masayuki
• Granted Patent: US 7,394,511 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• 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 substrates and a liquid crystal layer interposed between said substrates, said device including a plurality of pixels;

at least some of said pixels each including a light reflecting display section and a light transmitting display section;

wherein said light reflecting display sections are provided with color filters, and said light transmitting display sections are partially provided with color filters.

2. The liquid crystal display of claim 1, wherein the characteristics of the color filters in the light transmitting display sections are substantially the same as the characteristics of the color filters in the light reflecting display sections.

3. The liquid crystal display device of claim 1, wherein the color filters in said light transmitting display sections have a transmission color with chroma at least as good as the chroma of the color filters in said light reflecting display sections.