Backlight structure

• US 20070091641A1
• Filed: 10/20/2006
• Published: 04/26/2007
• Est. Priority Date: 10/20/2005
• Status: Abandoned Application

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lin, Ming-Yao, Lin, Ming-Te, Huang, Sheng-Pan, Chiang, Ya-Hui, Ying, Shang-Ping
• Application Number:
  US11/583,944
• Publication Number:
  US 20070091641A1
• Time in Patent Office: Days
• US Class Current: 362/615
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0046 Tapered light guide, e.g. wedge-shaped light guide
• CPC Class Codes: G02B 6/0078 Side-by-side arrangements, e.g. for large area displays
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133605 including specially adapted reflectors
• CPC Class Codes: G02F 1/133609 including means for improving the color mixing, e.g. white

Abstract

A backlight structure is disclosed, which is constituted of a series of backlight devices connecting with one another to form a large-scale backlight area, the backlight device at least being composed of an emitting portion and a light-guiding portion, wherein the emitting portion provides a light source, mixes the light of the light source and provides the mixed light into the light-guiding portion, which then guides the mixed light out. The emitting portion connects with the light-guiding portion to form a fault structure for connecting with another light-guiding portion, thereby forming a large-scale backlight structure by connecting a sequence of the light-guiding portions using the fault structures without size constraints.

Claims

1. A backlight structure comprising a plurality of backlight devices, each of the backlight devices comprising:

an emitting portion for providing a Light-Emitting Diode (LED) light source and mixing the light source; and

a light-guiding portion for guiding the light mixed by the emitting portion, the light guiding portion comprising a first face and a second face opposite to the first face, the second face and the emitting portion forming a fault structure.

2. The backlight structure of claim 1, wherein the fault structure formed by the second face and the emitting portion of at least one of the backlight devices is joined with the first face of another one of the backlight devices.

3. The backlight structure of claim 2, wherein the light-guiding portion is a light-guiding material with an oblique shape.

4. The backlight structure of claim 3, wherein a thickness of oblique shape decreases with an increase in incident distance of the light source.

5. The backlight structure of claim 2, wherein the fault structure is a stepped fault structure.

6. The backlight structure of claim 2, wherein the light-guiding portion comprises a light-guiding face connected with the emitting portion and a light output face opposite to the light-guiding face.

7. The backlight structure of claim 6, wherein a roughening process and a printing process are performed on the light-guiding face to form a scattering structure.

8. The backlight structure of claim 2, further comprising a passage formed by removing a section joining the second face of the light-guiding portion of one of the backlight devices and the first face of the light-guiding portion of another one of the backlight devices, such that light generated by the one of the backlight devices propagates to the another one of the backlight devices through this passage and vice versa.

9. A backlight structure assembly, comprising a plurality of the backlight structures of claim 2, the first faces of two backlight structures being connected back to back to form a large-scale backlight area, the first face of any one of the two backlight structures being not connected to the fault structure formed by connecting the second face and the emitting face of the other backlight structure.

10. A backlight structure comprising a plurality of backlight devices, each of the backlight devices comprising:

an emitting portion for providing a LED light source;

a reflection portion comprising an extending portion for mixing the light source provided by the emitting portion and a reflective face for reflecting the light uniformly mixed by the extending portion; and

a light-guiding portion for uniformly guiding the light mixed by the reflection portion, the light guiding portion comprising a first face and a second face opposite to the first face, the second face and the reflection portion connected to form a fault structure.

11. The backlight structure of claim 10, wherein the fault structure formed by the second face and the reflection portion of at least one of the backlight devices is joined with the first face of another backlight device.

12. The backlight structure of claim 11, wherein the reflection portion reflects the mixed light by 180 degrees to the light-guiding portion.

13. The backlight structure of claim 11, wherein the light-guiding portion is a light-guiding material with an oblique shape.

14. The backlight structure of claim 13, wherein the thickness of oblique shape decreases with the increase in incident distance of the light source.

15. The backlight structure of claim 11, wherein the light-guiding portion and the reflection portion are integrated to form one structure.

16. The backlight structure of claim 11, further comprising a passage formed by removing a section joining the second face of the light-guiding portion of one of the backlight devices and the first face of the light-guiding portion of another one of the backlight devices, such that light generated by the one of the backlight devices propagates to the another one of the backlight devices through this passage and vice versa.

17. The backlight structure of claim 11, wherein the fault structure is a stepped fault structure.

18. The backlight structure of claim 11, wherein the light-guiding portion comprises a light-guiding face connected with the reflection portion and a light output face opposite to the light-guiding face.

19. The backlight structure of claim 18, wherein a roughening process and a printing process are performed on the light-guiding face to form a scattering structure.

20. A backlight structure assembly, comprising a plurality of the backlight structures of claim 11, the first faces of two backlight structures being connected back to back to form a large-scale backlight area, the first face of any one of the two backlight structures being not connected to the fault structure formed by connecting the second face and the reflection face of the other backlight structure.