Backlight assembly and liquid crystal display apparatus having the same

• US 20050024847A1
• Filed: 08/02/2004
• Published: 02/03/2005
• Est. Priority Date: 08/02/2003
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ahn, Seung-Ho, Kwak, Hee-June
• Granted Patent: US 7,241,040 B2
• Time in Patent Office: Days
• US Class Current: 362/611
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources

Abstract

A backlight assembly includes a light supplying part and a light guide plate. The light supplying part includes a white light source and a monochromatic light source that generates a monochromatic light. The white light source generates a white light responsive to an electric power provided from exterior to the backlight assembly. The light guide plate is disposed adjacent to a side of the light supplying part. The light guide plate includes a light guiding region where the white light and the monochromatic light are guided into and a peripheral region that surrounds the light guiding region. Therefore, color reproducibility of an LCD apparatus is increased so that an image display quality of the LCD apparatus is improved.

Claims

1. A backlight assembly comprising:

a light supplying part including a white light source generating white light and a monochromatic light source generating monochromatic light responsive to electric power provided from exterior to the backlight assembly; and

a light guide plate disposed adjacent to a side of the light supplying part, the light guide plate including a light guiding region where the white light and the monochromatic light are guided into and a peripheral region that surrounds the light guiding region.

2. The backlight assembly of claim 1, wherein the light supplying part comprises a light emitting unit, the light emitting unit having the white and monochromatic light sources together.

3. The backlight assembly of claim 2, wherein the light supplying part further comprises one or more light emitting units spaced apart from one another.

4. The backlight assembly of claim 2, wherein an amount of the white light is larger than an amount of the monochromatic light.

5. The backlight assembly of claim 1, wherein the light supplying part comprises a plurality of the white light sources and a plurality of the monochromatic light sources, and the white light sources and the monochromatic light sources are disposed alternately.

6. The backlight assembly of claim 5, wherein the white light sources and the monochromatic light sources are spaced apart from one another.

7. The backlight assembly of claim 5, wherein a number of the white light sources is equal to a number of the monochromatic light sources.

8. The backlight assembly of claim 5, wherein a number of the white light sources is larger than a number of the monochromatic light sources.

9. The backlight assembly of claim 1, wherein a corner disposed in the peripheral region adjacent to the light supplying unit is chamfered.

10. The backlight assembly of claim 1, wherein the monochromatic light is a same color light which has the lowest brightness among red, green and blue colors from the white light source.

11. The backlight assembly of claim 10, wherein the monochromatic light is one of the red, green or blue color lights.

12. The backlight assembly of claim 1, wherein the light source comprises a light emitting diode.

13. A liquid crystal display apparatus comprising:

a light supplying part including a white light source generating white light and a monochromatic light source generating monochromatic light responsive to electric power provided from exterior to the light supplying part;

a light guide plate disposed adjacent to a side of the light supplying part, the light guide plate including a light guiding region where the white light and the monochromatic light are guided into and a peripheral region that surrounds the light guiding region; and

a liquid crystal display panel displaying an image using the white light and the monochromatic light.

14. The liquid crystal display apparatus of claim 13, wherein the light supplying part comprises a light emitting unit, the light emitting unit having the white and monochromatic light sources together.

15. The liquid crystal display apparatus of claim 14, wherein the light supplying part further comprises one or more light emitting units spaced apart from one another.

16. The liquid crystal display apparatus of claim 13, wherein the light supplying part comprises a plurality of the white light sources and a plurality of the monochromatic light sources, and the white light sources and the monochromatic light sources are disposed alternately.

17. The liquid crystal display apparatus of claim 16, wherein the white light sources and the monochromatic light sources are spaced apart from one another.

18. The liquid crystal display apparatus of claim 13, wherein a corner disposed in the peripheral region adjacent to the light supplying unit is chamfered.

19. The backlight assembly of claim 13, wherein the monochromatic light has the same color light that is lowest brightness in red, green and blue color lights from the white light source.

20. The backlight assembly of claim 13, wherein the light source comprises a light emitting diode.