Backlight module and display device

• US 9,664,846 B2
• Filed: 05/14/2015
• Issued: 05/30/2017
• Est. Priority Date: 09/19/2014
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Li, Dongxi, Zhang, Minghui, Zheng, Hui
• Primary Examiner(s): TSO, LAURA K
• Application Number:
  US14/785,821
• Publication Number:
  US 20160259123A1
• Time in Patent Office: 747 Days
• Field of Search: 362 971, 362633, 362634
• CPC Class Codes: G02B 6/005 provided by one optical element, or plurality thereof, placed on the light output side of the light guide
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package

Abstract

A backlight module and a display device are provided. The backlight module includes a back plate, a light emitting component located on the back plate and a module frame located around periphery of the back plate. The module frame includes a main body section and a wedge shaped section on the side of main body section close to light emitting component. The inclined surface of the wedge shaped section faces the light exit surface of the light emitting component and the angle formed there between is an acute angle. The backlight module and the display device mainly utilize the design of the module frame with a wedge shaped section to facilitate the outgoing of the light rays emitted by the backlight source around its periphery in a narrow bezel design, solving the problem of peripheral pixels disappearing from side view.

Claims

1. A backlight module, comprising a back plate, a light emitting component located on the back plate and a module frame located around a periphery of the back plate, wherein the module frame comprises a main body section and a wedge shaped section on a side of the main body section close to the light emitting component, an inclined surface of the wedge shaped section faces a light exit surface of the light emitting component, and an angle formed by the inclined surface of the wedge shaped section and the light exit surface of the light emitting component is an acute angle, and the inclined surface of the wedge shaped section has a notch disposed therein to engage with the light emitting component.

2. The backlight module of claim 1, wherein the angle between the inclined surface of the wedge shaped section and the light exit surface of the light emitting component is between 10°

and 80°

.

3. The backlight module of claim 2, wherein the angle between the inclined surface of the wedge shaped section and the light exit surface of the light emitting component is 60°

.

4. The backlight module of claim 1, wherein the notch has a notch surface parallel with and facing the light exit surface of the light emitting component.

5. The backlight module of claim 1, wherein the surface of the wedge shaped section on a side away from the light emitting component is a plane parallel to the light exit surface of the light emitting component.

6. The backlight module of claim 1, wherein the back plate comprises a side wall and a base board, the light emitting component is located on the base board and the main body section of the module frame is bonded to the side wall.

7. The backlight module of claim 6, wherein the module frame further comprises an engaging groove section on an outer side of the main body section;

the side wall of the back plate has a through hole disposed therein corresponding to the engaging groove section;

the module frame is fixed to the back plate by locking between the engaging groove section and the through hole.

8. The backlight module of claim 7, wherein the module frame further includes an outlaid section joining to the engaging groove section and located on the outer side of the side wall of the back plate, and the projected area of the outlaid section on the side wall of the back plate is larger than the area of the through hole.

9. A display device, comprising the backlight module of claim 1.

10. The display device of claim 9, wherein the display device comprises a display panel adhered to a part of the surface of the module frame away from the light emitting component.

11. The display device of claim 9, wherein the module frame further comprises an engaging groove section on an outer side of the main body section and an outlaid section joining to the engaging groove section, the display device further comprises a display device bezel around the periphery of the back plate, and a through hole is disposed in the display device bezel corresponding to the outlaid section.

12. The display device of claim 10, wherein the module frame further comprises an engaging groove section on an outer side of the main body section and an outlaid section joining to the engaging groove section, the display device further comprises a display device bezel around the periphery of the back plate, and a through hole is disposed in the display device bezel corresponding to the outlaid section.

13. The backlight module of claim 2, wherein the back plate comprises a side wall and a base board, the light emitting component is located on the base board and the main body section of the module frame is bonded to the side wall.

14. The backlight module of claim 3, wherein the back plate comprises a side wall and a base board, the light emitting component is located on the base board and the main body section of the module frame is bonded to the side wall.

15. The backlight module of claim 4, wherein the back plate comprises a side wall and a base board, the light emitting component is located on the base board and the main body section of the module frame is bonded to the side wall.

16. The backlight module of claim 5, wherein the back plate comprises a side wall and a base board, the light emitting component is located on the base board and the main body section of the module frame is bonded to the side wall.