Optoelectronic Device, Display and Backlight Module

• US 20110205145A1
• Filed: 05/24/2010
• Published: 08/25/2011
• Est. Priority Date: 02/24/2010
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Hsiao, Meng-Jia, Lin, Su-Yi, Lin, Po-Iem
• Application Number:
  US12/785,968
• Publication Number:
  US 20110205145A1
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements

Abstract

A backlight module comprises a light transmission member and a light emitting module. The light emitting module includes at least two circuit substrates and a plurality of light emitting units. Short sides of the circuit substrates are corresponding to each other. The light emitting units are disposed on the circuit substrates and face a light incident surface of the light transmission member. The illumination chromaticity of several light emitting units disposed on the circuit substrates and adjacent to each other, and the mixed illumination chromaticity of other light emitting units disposed on each circuit substrate are substantially the same, and all emits white light.

Claims

1. A backlight module, comprising:

an light transmission member, at least one side of the light transmission member having a light incident surface; and

a light emitting module, disposed in the light incident surface of the light transmission member, and at least comprising;

a first circuit substrate and a second circuit substrate respectively having a short side, and the short side of the first circuit substrate being corresponding to the short side of the second circuit substrate; and

a plurality of light emitting units disposed on the first circuit substrate and the second circuit substrate,

wherein (1) the illumination chromaticity of the light emitting units which are adjacent to each other and disposed on the first circuit substrate and the second circuit substrate, (2) the mixed illumination chromaticity of other light emitting units which are disposed on the first circuit substrate, and (3) the mixed illumination chromaticity of other light emitting units which are disposed on the second circuit substrate are substantially the same.

2. The backlight module of claim 1, wherein the light emitting units comprise:

a plurality of first light emitting diodes having a first illumination chromaticity; and

a plurality of second light emitting diodes having a second illumination chromaticity,

wherein the first light emitting diodes and the second light emitting diodes are disposed on the first circuit substrate and the second circuit substrate with a staggered arrangement,

the first illumination chromaticity is substantially different from the second illumination chromaticity, and

after mixing the first illumination chromaticity and the second illumination chromaticity, white light is provided to emit.

3. The backlight module of claim 2, wherein two of the light emitting units which are adjacent to each other and disposed on the first circuit substrate and the second circuit substrate respectively comprises the first light emitting diode and the second light emitting diode.

4. The backlight module of claim 3, wherein the first light emitting diodes and the second light emitting diodes are disposed on the first circuit substrate and the second circuit substrate with an arrangement of staggering one first light emitting diode with one second light emitting.

5. The backlight module of claim 3, wherein the first light emitting diodes and the second light emitting diodes are disposed on the first circuit substrate and the second circuit substrate with an arrangement of staggering two first light emitting diodes with two second light emitting diodes.

6. The backlight module of claim 3, wherein the first illumination chromaticity is a cold-color chromaticity, the second illumination chromaticity is a warm-color chromaticity.

7. The backlight module of claim 1, wherein the light emitting units comprise:

a plurality of third light emitting diodes having a third illumination chromaticity;

a plurality of fourth light emitting diodes having a fourth illumination chromaticity; and

a plurality of fifth light emitting diodes having a fifth illumination chromaticity, wherein the third light emitting diodes, the fourth light emitting diodes and the fifth light emitting diodes are in sequence arranged on the first circuit substrate and the second circuit substrate, and

after mixing the third illumination chromaticity, the fourth illumination chromaticity and the fifth illumination chromaticity, white light is provided to emit.

8. The backlight module of claim 7, wherein three of the light emitting units which are adjacent together and disposed on the first circuit substrate and the second circuit substrate respectively comprise the third light emitting diode, the fourth light emitting diode and the fifth light emitting diode.

9. The backlight module of claim 7, wherein the third illumination chromaticity, the fourth illumination chromaticity and the fifth illumination chromaticity respectively are a cold-color chromaticity, a warm-color chromaticity and a white chromaticity.

10. The backlight module of claim 7, wherein the third illumination chromaticity and the fourth illumination chromaticity respectively are a cold-color chromaticity and a warm-color chromaticity, and the fifth illumination chromaticity is one of a cold-color chromaticity and a warm-color chromaticity.

11. The backlight module of claim 1, wherein the light emitting units comprise:

at least two sixth light emitting diodes respectively which are adjacent to each other and disposed on the first circuit substrate and the second circuit substrate, wherein the illumination chromaticity of the sixth light emitting diodes is a white chromaticity.

12. The backlight module of claim 1, wherein the backlight module further comprises:

a third circuit substrate having a short side, the short side of the third circuit substrate is corresponding to the other short side of the second circuit substrate,

wherein the light emitting units are disposed on the first circuit substrate, the second circuit substrate and the third circuit substrate,

wherein the illumination chromaticity of two light emitting units which are adjacent to each other and disposed on the second circuit substrate and the third circuit substrate, and the mixed illumination chromaticity of other light emitting units which are disposed on the third circuit substrate are substantially the same.

13. The backlight module of claim 12, wherein the circuit substrates respectively are a printed circuit board (PCB), a metal core printed circuit board (MCPCB) or a flexible printed circuit board (FPC).

14. A display comprising the backlight module of claim 1.

15. An optoelectronic device comprising the display of claim 14.