Light emitting diode and backlight module having light emitting diode

• US 20060012989A1
• Filed: 12/21/2004
• Published: 01/19/2006
• Est. Priority Date: 07/16/2004
• Status: Abandoned Application

• Current Assignee: CHI LIN Technology Company Limited (CHI MEI Optoelectronics Corporation)
• Original Assignee: CHI LIN Technology Company Limited (CHI MEI Optoelectronics Corporation)
• Inventors: Lee, I-Chang
• Application Number:
  US11/018,157
• Publication Number:
  US 20060012989A1
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133604 with lamps
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/50 Wavelength conversion elements

Abstract

The present invention relates to a light emitting diode comprising a blue die and a fluorescent material layer. The blue die is used for generating blue light when being activated. The fluorescent material layer is used for generating yellow light when being activated. The light emitting diode further comprises a red die that is used for generating red light when being activated, so as to increase the red color component of the output light of the light emitting diode. The present invention also relates to a backlight module having light emitting diode, which has a well-balanced color when being used for a light source of a liquid crystal display or a liquid crystal display television.

Claims

1. A light emitting diode comprising a blue die covered by a fluorescent material layer, the blue die being used for generating blue light when being activated, the fluorescent material layer being used for generating yellow light when being activated, characterized in that the light emitting diode further comprises a red die used for generating red light when being activated, so as to increase the red color component of the output light of the light emitting diode.

2. A backlight module comprising the light emitting diode of claim 1.

3. A liquid crystal display comprising the backlight module of claim 2.

4. A liquid crystal display television comprising the backlight module of claim 2.

5. A backlight module comprising:

a housing;

a light source disposed in the housing;

a reflective plate disposed under the light source and used for reflecting light beams generated by the light source; and

a diffusion plate disposed above the light source and used for diffusing the light beams generated by the light source and reflected by the reflective plate;

characterized in that

the light source comprises a plurality of lamps and a plurality of green light emitting diodes.

6. The backlight module according to claim 5, wherein the lamps are cold cathode fluorescent lamps.

7. The backlight module according to claim 5, wherein the lamps and the green light emitting diodes are arrayed alternatively.

8. The backlight module according to claim 5, wherein each of the green light emitting diodes is in a configuration of strip.

9. The backlight module according to claim 5, wherein all of the lamps are surrounded by the green light emitting diodes.

10. A liquid crystal display comprising the backlight module of claim 5.

11. A liquid crystal display television comprising the backlight module of claim 5.

12. A backlight module comprising:

a housing;

a light source disposed in the housing;

a reflective plate disposed under the light source and used for reflecting light beams generated by the light source; and

a diffusion plate disposed above the light source and used for diffusing the light beams generated by the light source and reflected by the reflective plate;

characterized in that

the light source comprises a plurality of white light emitting diodes and a plurality of red light emitting diodes.

13. The backlight module according to claim 12, wherein the white light emitting diodes and the red light emitting diodes are arrayed alternatively.

14. The backlight module according to claim 12, wherein all of the white light emitting diodes are surrounded by the red light emitting diodes.

15. A liquid crystal display comprising the backlight module of claim 12.

16. A liquid crystal display television comprising the backlight module of claim 12.