Backlight Unit

• US 20070158666A1
• Filed: 02/14/2006
• Published: 07/12/2007
• Est. Priority Date: 01/04/2006
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Yu, Chuan-Pei, Li, Rui-Yong
• Application Number:
  US11/307,592
• Publication Number:
  US 20070158666A1
• Time in Patent Office: Days
• US Class Current: 257/98
• CPC Class Codes: G02B 6/0026 Wavelength selective element, sheet or layer, e.g. filter or grating
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources

Abstract

A backlight unit includes a light guide plate having a light-incidence plane and a light-exit plane and at least a light emitting diode (LED) mixing package located in proximity to the light-incidence plane for providing lights to the backlight unit. The LED mixing package includes at least a first color LED chip, at least a first color compensation film corresponding to the first color LED chip, at least a second color LED chip, and at least a second color compensation film corresponding to the second color LED chip, in which the first color compensation film and the second color compensation film are located on the light-incidence plane of the backlight unit. The backlight unit further includes at least a spectrum sensor disposed on the light-exit plane of the backlight unit.

Claims

1. A backlight unit comprising:

a light guide plate comprising a light-incidence plane and a light-exit plane; and

at least a light emitting diode (LED) mixing package disposed in proximity to the light-incidence plane for providing lights, the light emitting diode mixing package comprises;

at least a first color LED chip and at least a first color compensation film corresponding to the first color LED chip; and

at least a second color LED chip and at least a second color compensation film corresponding to the second color LED chip; and

a spectrum sensor disposed on the light-exit plane of the backlight unit.

2. The backlight unit of claim 1, wherein the spectrum sensor measures the spectrum produced by the light emitting diode (LED) mixing package.

3. The backlight unit of claim 1 further comprising at least a third color LED chip and at least a third color compensation film corresponding to the third color LED chip.

4. The backlight unit of claim 1, wherein the first color LED chip comprises a red LED chip.

5. The backlight unit of claim 4, wherein the first compensation film comprises a cyan compensation film.

6. The backlight unit of claim 1, wherein the second color LED chip comprises a green LED chip.

7. The backlight unit of claim 6, wherein the second color compensation film comprises a purple compensation film.

8. The backlight unit of claim 3, wherein the third color LED chip comprises a blue LED chip.

9. The backlight unit of claim 8, wherein the third color compensation film comprises a yellow compensation film.

10. The backlight unit of claim 3, wherein the first color compensation film, the second color compensation film, and the third color compensation film are fully transparent compensation film or semi-transparent compensation film.

11. The backlight unit of claim 1 further comprising an optical assembly disposed on the light-exit plane of the backlight unit.

12. The backlight unit of claim 11, wherein the optical assembly comprises at least a diffuser film, at least a prism, or both.

13. The backlight unit of claim 1, wherein the backlight unit is an edge-type backlight unit.

14. The backlight unit of claim 1, wherein the light guide plate comprises a wedge-shaped plate or a flat plate.

15. The backlight unit of claim 1, wherein the backlight unit is a direct-type backlight unit, wherein the bottom of the backlight unit and the top of the light guide plate comprise a light-incidence plane.