Reflection-Light Backlight Module and LCD Device

• US 20130234921A1
• Filed: 03/31/2012
• Published: 09/12/2013
• Est. Priority Date: 03/06/2012
• Status: Abandoned Application

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Tang, Guofu
• Application Number:
  US13/503,847
• Publication Number:
  US 20130234921A1
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence

Abstract

The invention provides a reflection-light backlight module and an LCD device. The backlight module includes an LGP, and a reflector arranged on the light incident surface of the LGP. The reflector includes a reflection part, a first extension part which is connected with the front end of the reflection part, and a second extension part which is connected to the back end of the reflection part and arranged opposite to the first extension part. The first extension part and the second extension part clamp the LGP from the light emitting side of the LGP and the other side opposite to the light emitting side. In the invention, because the outer edge of the reflection part of the reflector of the backlight module is provided with an extension part used for shading light, the gap between the edge of the reflection part of the reflector and the light incident surface of the LGP is shaded. Thus, light is prevented from leaking from the gap, and the utilization rate of the light source is increased. Therefore, the brightness of the backlight module and the display effect of the LCD device are increased.

Claims

1. A reflection-light backlight module, comprising:

a backplane, a PCB, an LGP, a reflection sheet, and a reflector arranged on the light incident surface of the LGP;

wherein said reflector comprises a reflection part, a first extension part which is connected with the front end of the reflection part, and a second extension part which is connected to the back end of the reflection part and arranged opposite to said first extension part;

said first extension part and said second extension part clamp said LGP from the light emitting side of said LGP and the other side opposite to said light emitting side;

the joint of said second extension part and said reflection part is provided with a limit part for limiting the position of said LGP;

components clamped between the first extension part and the second extension part of said reflector comprise the reflection sheet, and the LGP;

said PCB is arranged below said first extension part, said first extension part is provided with a through hole for receiving the LED on said PCB, said backplane is provided with an opening for fixing said PCB, and said PCB is fixed on said backplane.

2. A reflection-light backlight module, comprising:

an LGP, and a reflector arranged on the light incident surface of the LGP;

wherein said reflector comprises a reflection part, a first extension part which is connected with the front end of said reflection part, and a second extension part which is connected to the back end of said reflection part and arranged opposite to said first extension part;

said first extension part and said second extension part clamp said LGP from the light emitting side of said LGP and the other side opposite to said light emitting side.

3. The reflection-light backlight module of claim 2, wherein the joint of said second extension part and said reflection part is provided with a limit part for limiting the position of said LGP.

4. The reflection-light backlight module of claim 3, wherein the inside surface of said limit part is in parallel with the light incident surface of said LGP.

5. The reflection-light backlight module of claim 2, wherein the reflection surface of said reflection part comprises a plurality of planes with different inclination angels.

6. The reflection-light backlight module of claim 2, wherein the reflection surface of said reflection part is a concave curved surface.

7. The reflection-light backlight module of claim 2, wherein said backlight module comprises a PCB, and a reflection sheet;

components clamped between the first extension part and the second extension part of said reflector comprise the PCB, the reflection sheet, and the LGP.

8. The reflection-light backlight module of claim 2, wherein said backlight module comprises a PCB, and a reflection sheet;

components clamped between the first extension part and the second extension part of said reflector comprise the reflection sheet, and the LGP;

said PCB is arranged below said first extension part, and said first extension part is provided with a through hole for receiving the LED on said PCB.

9. The reflection-light backlight module of claim 8, wherein said backlight module comprises a backplane;

said backplane is provided with an opening for fixing said PCB, and said PCB is fixed on said backplane.

10. The reflection-light backlight module of claim 9, wherein said first extension part is riveted with a bolt in the position corresponding to a screw hole, and said PCB is locked between said backplane and said first extension part by said bolt.

11. The reflection-light backlight module of claim 8, wherein the back end of said second extension part is provided with a bent clamping hook, and said PCB is fixed below said second extension part by said clamping hook.

12. The reflection-light backlight module of claim 2, wherein said backlight module comprises an optical film;

said optical film is arranged on said second extension part.

13. The reflection-light backlight module of claim 2, wherein said reflector is made of metal material with good heat conductivity or plastic material with high reflectance.

14. An LCD device, comprising:

a backlight module;

wherein said backlight module comprises an LGP, and a reflector arranged on the light incident surface of said LGP;

said reflector comprises a reflection part, a first extension part which is connected with the front end of said reflection part, and a second extension part which is connected to the back end of said reflection part and arranged opposite to said first extension part;

said first extension part and said second extension part clamp said LGP from the light emitting side of said LGP and the other side opposite to said light emitting side.

15. The LCD device of claim 14, wherein the joint of said second extension part and said reflection part is provided with a limit part for limiting the position of said LGP.

16. The LCD device of claim 15, wherein the inside surface of said limit part is in parallel with the light incident surface of said LGP.

17. The LCD device of claim 14, wherein said backlight module comprises a PCB, and a reflection sheet;

components clamped between the first extension part and the second extension part of said reflector comprise the PCB, the reflection sheet, and the LGP.

18. The LCD device of claim 14, wherein said backlight module comprises a PCB, and a reflection sheet;

components clamped between the first extension part and the second extension part of said reflector comprise the reflection sheet, and the LGP;

said PCB is arranged below said first extension part, and said first extension part is provided with a through hole for receiving the LED on said PCB.

19. The LCD device of claim 18, wherein said backlight module comprises a backplane;

said backplane is provided with an opening for fixing said PCB, and said PCB is fixed on said backplane.

20. The LCD device of claim 18, wherein the back end of said second extension part is provided with a bent clamping hook, and said PCB is fixed below said second extension part by said clamping hook.