Liquid crystal display device and fabrication method thereof

• US 20060098140A1
• Filed: 11/08/2005
• Published: 05/11/2006
• Est. Priority Date: 11/09/2004
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Ki-Dong
• Application Number:
  US11/268,545
• Publication Number:
  US 20060098140A1
• Time in Patent Office: Days
• US Class Current: 349/98
• CPC Class Codes: G02B 5/3058 comprising electrically conductive elements, e.g. wire grids, conductive particles
• CPC Class Codes: G02F 1/133536 Reflective polarizers G02F1/13362 takes precedence
• CPC Class Codes: G02F 1/133548 Wire-grid polarisers
• CPC Class Codes: G02F 1/1336 Illuminating devices

Abstract

Disclosed are a liquid crystal display device and its fabrication method capable of improving brightness by increasing efficiency of light used for the image formation. A liquid crystal display (LCD) device, comprising: a backlight unit including a reflector and emitting light from a light source; a polarizer transmitting part of light emitted from the backlight unit and reflecting the rest of light to the backlight unit; and a liquid crystal display panel forming an image by using a light transmitted through the polarizer.

Claims

1. A liquid crystal display (LCD) device, comprising:

a backlight unit including a reflector and emitting light from a light source;

a polarizer transmitting part of light emitted from the backlight unit and reflecting the rest of light to the backlight unit; and

a liquid crystal display panel forming an image by using a light transmitted through the polarizer.

2. The LCD device of claim 1, wherein the polarizer has a structure that reflects light having one of a P wave component or an S wave component to the backlight unit.

3. The LCD device of claim 1, wherein the polarizer includes a wire grid polarizer.

4. The LCD device of claim 3, wherein the grid interval of the wire grid polarizer is ½

or less of a wavelength of light emitted from the light source.

5. The LCD device of claim 3, wherein the substrate of the wire grid polarizer is formed of a predetermined high molecular material.

6. The LCD device of claim 5, wherein the high molecular material includes quartz.

7. The LCD device of claim 5, wherein the high molecular material includes glass.

8. The LCD device of claim 3, wherein the wire grid of the wire grid polarizer is formed of a metallic wire.

9. The LCD device of claim 3, wherein the wire grid of the wire grid polarizer is arranged at a regular interval in one direction.

10. The LCD device of claim 3, wherein the wire grid polarizer has a structure that includes a passivation film for protecting the wire grid.

11. The LCD device of claim 1, wherein an absorptive polarization film is formed at only one of both surfaces of the LCD panel.

12. The LCD device of claim 11, wherein the absorptive polarization film is disposed at only the opposite side to the LCD panel surface facing the polarizer.

13. The LCD device of claim 1, wherein a metallic grid is formed on a substrate surface of the LCD panel, and the polarizer and the LCD panel are integrally formed.

14. A method for fabricating an LCD device comprising:

determining a grid interval of a wire grid polarization to ½

or less of a wavelength of light used in the LCD device;

fabricating a wire grid polarizer having the determined grid interval; and

inserting the wire grid polarizer between a backlight unit and an LCD panel.

15. The method of claim 14, wherein the wire grid polarizer has a structure that reflects light of one of a P wave component and an S wave component to the backlight unit.

16. The method of claim 14, wherein a substrate of the wire grid polarizer is made of a predetermined high-molecular material.

17. The method of claim 14, wherein the wire grid of the wire grid polarizer is made of a metallic wire.

18. The method of claim 14, wherein the wire grid of the wire grid polarizer is arranged in one direction at a regular interval.

19. The method of claim 14, wherein the wire grid polarizer has a structure including a passivation film for protecting the wire grid.

20. The method of claim 14, wherein the LCD panel has an absorptive polarization film at only one of both surfaces.

21. The method of claim 20, wherein the absorptive polarization film is disposed at only the opposite surface to an LCD panel surface facing the wire grid polarizer.

22. The method of claim 14, a metallic grid is formed on a substrate surface of the LCD panel, and the wire grid polarizer and thte LCD panel are integrally formed.