Liquid crystal display unit

• US 20060050207A1
• Filed: 11/13/2003
• Published: 03/09/2006
• Est. Priority Date: 11/15/2002
• Status: Abandoned Application

• Current Assignee: Seiko Instruments Incorporated (Seiko Group)
• Original Assignee: Seiko Instruments Incorporated (Seiko Group)
• Inventors: Fukuchi, Takakazu, Igarashi, Katsuyuki
• Application Number:
  US10/535,152
• Publication Number:
  US 20060050207A1
• Time in Patent Office: Days
• US Class Current: 349/113
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/133626 providing two modes of illumination, e.g. day-night
• CPC Class Codes: G02F 2203/09 transflective

Abstract

To brighten a screen of a liquid crystal display device in the case of reflection type display and increase the planarity of a color filter substrate surface to improve a display quality. The liquid crystal display device according to the present invention includes a reflective film formed between a colored layer of a color filter and a liquid crystal layer to thereby prevent an incident light in the case of reflection type display from passing through the colored layer. A color display is available in the case of transmission type display, and a black-and-white display is available in the case of reflection type display; an image formed with light not passing through the colored layer is viewed in the case of reflection type display to thereby ensure a brightness in the case of reflection type display. In addition, the reflective film can be formed to be thin and therefore the planarity of the color filter substrate surface can be improved.

Claims

1. A liquid crystal display device, comprising:

a color filter substrate having a color filter formed thereon;

a counter substrate opposed to the color filter substrate;

a liquid crystal layer interposed between the color filter substrate and the counter substrate; and

a reflective film disposed between a colored layer serving as the color filter and the liquid crystal layer and having an area smaller than an area of the colored layer.

2. A liquid crystal display device according to claim 1;

wherein the reflective film is formed on the colored layer.

3. A liquid crystal display device according to claim 2;

further including a transparent insulating film disposed between the colored layer and the reflective film.

4. A liquid crystal display device according to claim 3;

wherein the reflective film is a metal reflective film, and the transparent insulating film is a silicon oxide or a titanium oxide.

5. A liquid crystal display device according to claim 4;

wherein the metal reflective film comprises aluminum or silver.

7. A liquid crystal display device according to claim 1;

further including a planarizing film formed disposed on the color filter, the reflective film being formed on the planarizing film.

11. A liquid crystal display device according to claim 2;

further including a planarizing film formed on and covering the reflective film.

12. A liquid crystal display device according to claim 1;

wherein the area of the reflective film is 10% to 50% of the area of the colored layer.

13. A liquid crystal display device according to claim 12;

further including a transparent electrode formed on the filter substrate; and

an opposite electrode opposite the transparent electrode formed on the counter substrate.

14. A liquid crystal display device according to claim 1;

wherein the reflective film has a thickness of 0.1 to 0.2 μ

m.

6. (canceled)

8-10. -10. (canceled)