Backlight, backlight module and display device

• US 9,632,232 B2
• Filed: 10/20/2014
• Issued: 04/25/2017
• Est. Priority Date: 06/20/2014
• Status: Active Grant

• Current Assignee: Beijing BOE Vision Electronic Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Vision Electronic Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Fu, Changjia
• Primary Examiner(s): Truong, Bao Q
• Assistant Examiner(s): ZIMMERMAN, GLENN D
• Application Number:
  US14/518,289
• Publication Number:
  US 20150370004A1
• Time in Patent Office: 918 Days
• Field of Search: 362612, 362621, 362 971, 362 972, 362 973
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• 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 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: H05K 1/028 Bending or folding regions of flexible printed circuits H05K1/0283 takes precedence
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 3/0061 onto a metallic substrate, e.g. a heat sink heat sinks for electric apparatus H05K7/20

Abstract

The invention discloses a backlight, a backlight module and a display device, belonging to the field of display technology. The backlight includes a plurality of LED lamps, a flexible circuit board for supplying power to the LED lamps and a supporting plate for supporting the flexible circuit board, wherein the flexible circuit board is arranged below the LED lamps, and the supporting plate is arranged below the flexible circuit board and is in a bent shape. In the present invention, by designing the supporting plate to be in a bent shape, it is no longer required to have to employ the existing linear backlight with a single structure, and meanwhile, the contact area between the supporting plate and air is enlarged to improve the heat dissipation effect of the backlight.

Claims

1. A backlight, comprising a plurality of LED lamps, a flexible circuit board for supplying power to the LED lamps and a rigid supporting plate for supporting the flexible circuit board, wherein the flexible circuit board is arranged below the LED lamps, and the supporting plate is arranged below the flexible circuit board and is in a bent shape,

wherein the cross section of the supporting plate is in a periodic sawtooth shape, the lengths of two sides of each sawtooth part are equal, and the included angle formed by the two sides is in a range of 115°

-125°

.

2. The backlight of claim 1, wherein the supporting plate is made of a metal material.

3. The backlight of claim 1, further comprising heat conductive adhesive arranged between the flexible circuit board and the supporting plate.

4. The backlight of claim 2, wherein the metal material is aluminum.

5. A backlight module, comprising the backlight and a light guide plate opposite to the backlight, the backlight comprising a plurality of LED lamps, a flexible circuit board for supplying power to the LED lamps and a rigid supporting plate for supporting the flexible circuit board, wherein the flexible circuit board is arranged below the LED lamps, and the supporting plate is arranged below the flexible circuit board and is in a bent shape,

wherein the cross section of the supporting plate is in a periodic sawtooth shape, the lengths of two sides of each sawtooth part are equal, and the included angle formed by the two sides is in a range of 115°

-125°

.

6. The backlight module of claim 5, wherein the light guide plate and the backlight are matched with each other in shape.

7. The backlight module of claim 5, wherein positioning lugs are arranged on two respective sides of the light guide plate, and the positioning lugs are matched with an outer frame of a display device to fix the light guide plate in the outer frame.

8. A display device, comprising a backlight module comprising the backlight and a light guide plate opposite to the backlight, the backlight comprising a plurality of LED lamps, a flexible circuit board for supplying power to the LED lamps and a rigid supporting plate for supporting the flexible circuit board, wherein the flexible circuit board is arranged below the LED lamps, and the supporting plate is arranged below the flexible circuit board and is in a bent shape,

wherein the cross section of the supporting plate is in a periodic sawtooth shape, the lengths of two sides of each sawtooth part are equal, and the included angle formed by the two sides is in a range of 115°

-125°

.

9. The display device of claim 8, wherein the light guide plate and the backlight are matched with each other in shape.

10. The display device of claim 8, wherein positioning lugs are arranged on two respective sides of the light guide plate, and the positioning lugs are matched with an outer frame of a display device to fix the light guide plate in the outer frame.