Display device and backlight module

• US 8,926,113 B2
• Filed: 04/12/2012
• Issued: 01/06/2015
• Est. Priority Date: 03/28/2012
• Status: Active Grant

• 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: Li, Quan
• Primary Examiner(s): Mai, Anh
• Assistant Examiner(s): QUARTERMAN, KEVIN J
• Application Number:
  US13/510,610
• Publication Number:
  US 20130258703A1
• Time in Patent Office: 999 Days
• Field of Search: 362/606, 362/633, 362/632, 362/97.1, 362/609, 349/58, 349/62, 349/65
• US Class Current: 362/97.1
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means

Abstract

The present invention discloses a display device and a backlight module. The backlight module comprises a waveguide, a reflector, a backframe and a shimming device. The reflector arranged behind the waveguide. The backframe carries and supports the waveguide and the reflector. An light inlet edge of the waveguide and the backframe is defined with a gap in which a shimming device is seated within the gap so as to effectively support the waveguide. This arrangement can effectively prevent the warpage or bending of the waveguide in the area of the light inlet area. Stabilizing the efficiency of illumination of the backlight module. As a result, the insufficient of illumination of the waveguide encountered by the prior art is avoided.

Claims

1. A backlight module, comprising:

a waveguide;

a reflector arranged behind the waveguide;

a backframe carrying the waveguide and the reflector, a light inlet edge of the waveguide and the backframe being provided with a gap; and

a shimming device configured in a supporting post and disposed within the gap so as to effectively support the waveguide, wherein the backframe is defined with a through hole, and a first end of the supporting post is in touch with a bottom surface of the reflector after passing through the hole, and the second end is landed on the backframe.

2. The backlight module as recited in claim 1, wherein the second end of the supporting post is an elastic, and the second end is secured onto an outer wall of the backframe so as to create an elastic engagement between the supporting post and the backframe.

3. The backlight module as recited in claim 1, wherein the second end of the supporting post is secured to the backframe by a screw member or a connecting pin.

4. The backlight module as recited in claim 1, wherein the shimming device is a supporting post is embodied into wedge-shaped configuration and with its upper end leaning against to the reflector, and its lower end rests onto an inner wall of the backframe.

5. The backlight module as recited in claim 4, wherein the upper end of the supporting post is defined with a recess defined with a first threaded hole passing through the upper end and the lower end of the supporting edge, the backframe is defined with a second threaded hole in aligning with the first threaded hole, the backlight module further includes a screw interconnecting the first and second threaded holes so as to securely attach the supporting post to the backframe.

6. The backlight module as recited in claim 5, wherein the supporting post is embodied into wedge-shaped configuration and is provided with an elastic embossment extending from the recess toward the waveguide.

7. The backlight module as recited in claim 6, wherein the waveguide and the reflector are defined with a recess with respect to the elastic embossment of the supporting post, the backlight module is provided an optic film disposed on top of the waveguide which is defined with openings corresponding to the elastic embossment, a top of the elastic embossment passing through the opening and engaged with a surface of the optic film.

8. The backlight module as recited in claim 7, wherein the top of the elastic embossment is configured as an elastic hook or a mushroom buckle.

9. A display device configured with a display panel and a backlight module which illuminates the display panel with its light source, the backlight module comprising:

a waveguide;

a reflector arranged behind the waveguide;

a backframe carrying the waveguide and the reflector, a light inlet edge of the waveguide and the backframe being provided with a gap; and

a shimming device configured in a supporting post and disposed within the gap so as to effectively support the waveguide, wherein the backframe is defined with a through hole, and a first end of the supporting post is in touch with a bottom surface of the reflector after passing through the hole, and the second end is landed on the backframe.

10. The display device as recited in claim 9, wherein the second end of the supporting post is an elastic, and the second end is secured onto an outer wall of the backframe so as to create an elastic engagement between the supporting post and the backframe.

11. The display device as recited in claim 9, wherein the second end of the supporting post is secured to the backframe by a screw member or a connecting pin.

12. The display device as recited in claim 9, wherein the shimming device is a supporting post is embodied into wedge-shaped configuration and with its upper end leaning against to the reflector and its lower end rests onto an inner wall of the backframe.

13. The display device as recited in claim 12, wherein the upper end of the supporting post is defined with a recess defined with a first threaded hole passing through the upper end and the lower end of the supporting post, the backframe is defined with a second threaded hole in aligning with the first threaded hole, the backlight module further includes a screw interconnecting the first and second threaded holes so as to securely attach the supporting post to the backframe.

14. The display device as recited in claim 13, wherein the supporting post is provided with an elastic embossment extending from the recess toward the waveguide.

15. The display device as recited in claim 14, wherein the waveguide and the reflector are defined with a recess with respect to the elastic embossment of the supporting post, the backlight module is provided an optic film disposed on top of the waveguide which is defined with openings corresponding to the elastic embossment, a top of the elastic embossment passing through the opening and engaged with a surface of the optic film.

16. The display device as recited in claim 15, wherein the top of the elastic embossment is configured as an elastic hook or a mushroom buckle.