LIQUID CRYSTAL DISPLAY DEVICE

• US 20110149205A1
• Filed: 05/10/2010
• Published: 06/23/2011
• Est. Priority Date: 12/23/2009
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Moon, Jong Won, Lee, Jong Beom, Hyun, Hye Rin
• Granted Patent: US 8,866,995 B2
• Time in Patent Office: Days
• US Class Current: 349/67
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133562 on the viewer side

Abstract

A liquid crystal display (LCD) device is disclosed, which comprises a liquid crystal panel which can be displayed in any other color instead of a black color during a non-driving mode through the use of one-color film for selectively reflecting light with a predetermined wavelength. The LCD device comprises a backlight unit for supplying light to a liquid crystal panel including lower and upper substrates; a first polarizing plate formed between the lower substrate and the backlight unit; a second polarizing plate formed on the upper substrate; a passivation substrate for protecting the lower and upper substrates; and a one-color film for selectively reflecting light with a predetermined wavelength during a non-driving mode of the backlight unit.

Claims

1. An LCD device comprising:

a backlight unit for supplying light to a liquid crystal panel including lower and upper substrates;

a first polarizing plate formed between the lower substrate and the backlight unit;

a second polarizing plate formed on the upper substrate;

a passivation substrate for protecting the lower and upper substrates; and

a one-color film for selectively reflecting light with a predetermined wavelength during a non-driving mode of the backlight unit.

2. The LCD device according to claim 1, further comprising an external case for covering the lower and upper substrates.

3. The LCD device according to claim 2, wherein the one-color film selectively reflects light with the same color as that of the external case.

4. The LCD device according to claim 1, wherein the passivation substrate is formed of a touch panel or glass substrate.

5. The LCD device according to claim 1, wherein the one-color film comprises a cholesteric liquid crystal layer and a quarter wave plate.

6. The LCD device according to claim 5, wherein the one-color film further includes an air gap or adhesive layer interposed between the cholesteric liquid crystal layer and the quarter wave plate.

7. The LCD device according to claim 1, wherein the one-color film is formed on the passivation substrate, or under the passivation substrate.

8. The LCD device according to claim 1, wherein the one-color film is formed on the second polarizing plate, or under the second polarizing plate.

9. The LCD device according to claim 1, wherein the one-color film comprises a cholesteric liquid crystal layer and a quarter wave plate,

wherein the cholesteric liquid crystal layer is formed on the passivation substrate, or under the passivation substrate.

10. The LCD device according to claim 9, wherein the quarter wave plate is formed on the second polarizing plate, or under the second polarizing plate.