Backlight module and display device

Patent metadata

Field	Value
Publication number	US-2024361514-A1
Application number	US-202218029490-A
Country	US
Kind code	A1
Filing date	May 23, 2022
Priority date	May 23, 2022
Publication date	Oct 31, 2024
Grant date	—

Abstract

Backlight module and display device are provided. Backlight module is for providing light source for display panel. Display panel has bonding side at a side of display panel in first direction. Backlight module includes: back plate, including base plate at backlight side of display panel, and first side plate at bonding side, where a side of first side plate away from base plate is bent towards direction away from center of base plate to form top plate supporting display panel; rubber frame, including second side plate at bonding side, where first opening is in middle of second side plate in extension direction of second side plate to accommodate first side plate; main circuit board, including opposite first and second ends in first direction, where first end is inserted between top plate and first side plate, and second end has first bonding area for bonding connection with display panel.

First claim

1 . A backlight module for providing a light source for a display panel, wherein the display panel has a bonding side at a side of the display panel in a first direction, and the backlight module comprises:
a back plate, wherein the back plate comprises a base plate at a backlight side of the display panel, and a first side plate at the bonding side, wherein a side of the first side plate away from the base plate is bent towards a direction away from a center of the base plate to form a top plate, and the top plate is configured to support the display panel; a rubber frame, comprising a second side plate at the bonding side, wherein a first opening is provided in a middle of the second side plate in an extension direction of the second side plate so as to accommodate the first side plate; and a main circuit board, wherein the main circuit board comprises a first end and a second end in the first direction that are opposite to each other, the first end is inserted between the top plate and the first side plate, and the second end has a first bonding area for bonding connection with the display panel.

2 . The backlight module according to claim 1 , wherein a heat-conducting adhesive is provided between the top plate and the main circuit board.

3 . The backlight module according to claim 2 , wherein a first surface of the main circuit board near the top plate has a wiring area and a non-wiring area, and the non-wiring area is a copper exposed area and is connected to the top plate through the heat-conducting adhesive.

4 . The backlight module according to claim 1 , wherein the back plate is made of a conductive metal, part of the top plate projects outwardly to form a lug, and a conductive adhesive is provided between the lug and the main circuit board.

5 . The backlight module according to claim 1 , wherein the back plate is made of a conductive metal, and a region between the top plate and the main circuit board comprises a first region and a second region in a direction parallel to the top plate, wherein the first region is provided with a heat-conducting adhesive, and the second region is provided with a conductive adhesive.

6 . The backlight module according to claim 1 , further comprising a light bar, wherein the light bar comprises a light board and a first flexible printed circuit board connected to the light board, and the first flexible printed circuit board passes through a through hole in the first side plate and extends to a side of the first side plate away from the base plate.

7 . The backlight module according to claim 1 , wherein the first side plate has a plate-like structure perpendicular to the base plate.

8 . The backlight module according to claim 7 , wherein the first side plate is provided with a reflective tape on its inner side surface near the base plate.

9 . The backlight module according to claim 8 , wherein the reflective tape comprises a base made of PC, PET or PU material, and a double-sided tape or a single-sided tape attached to opposite sides of the base.

10 . The backlight module according to claim 8 , further comprising a light bar, wherein the light bar comprises a light board and a first flexible printed circuit board connected to the light board, the light board comprises an LED light setting area and a first region at a side of the LED light setting area in the first direction, the first region has a second bonding area for bonding connection with the first flexible printed circuit board, and the reflective tape is between the first region and a non-display area of the display panel.

11 . The backlight module according to claim 10 , wherein a position, corresponding to the second bonding area, on a connection surface where the reflective tape is connected to the first region is recessed to form a groove.

12 . The backlight module according to claim 1 , wherein the first side plate comprises a first portion, a second portion, and a third portion;
the first portion is connected to the base plate and perpendicular to the base plate; the second portion is formed by bending the first portion in a direction of approaching a center of the base plate, and the second portion is parallel to the base plate; the third portion is formed by bending the second portion in a direction away from the base plate, and the third portion is perpendicular to the second portion; and the first end of the main circuit board is inserted into a space formed by the top plate, the second portion and the third portion together.

13 . The backlight module according to claim 12 , wherein a reflective layer is provide on respective side surfaces, near the base plate, of the first portion, the second portion and the third portion.

14 . The backlight module according to claim 12 , further comprising a light bar, wherein the light bar comprises a light board and a first flexible printed circuit board connected to the light board, the light board comprises a LED light setting area and a first region at a side of the LED light setting area in the first direction, the first region has a second bonding area for bonding connection with the first flexible printed circuit board, and the first portion is connected to the first region.

15 . The backlight module according to claim 14 , wherein a position, corresponding to the second bonding area, on a connection surface where the first portion is connected to the first region is recessed to form a groove.

16 . The backlight module according to claim 1 , wherein second openings are provided in two ends of the first side plate in an extension direction of the first side plate;
the second side plate comprises two connection parts at two ends of the first opening, and the two connection parts respectively cooperate with the corresponding second openings.

17 . The backlight module according to claim 16 , further comprising a light guide structure, wherein a groove is provided on a surface of the connection part away from the base plate to cooperate with a lug on the light guide structure.

18 . The backlight module according to claim 16 , wherein one of the connection parts comprises an extension part extending towards the other of the connection parts, and the extension part is connected to a surface of the first side plate away from the base plate through an adhesive layer.

19 . (canceled)

20 . A display device, comprising: a display panel and the backlight module according to claim 1 , wherein the display panel comprises a first edge at the bonding side, the top plate comprises a second edge away from the base plate, the first edge is at a side of the second edge near the base plate, and a distance between the edge of the display panel at the bonding side and the edge of the top plate away from the display panel is greater than 0.15 mm.

21 . The display device according to claim 20 , wherein a heat-conducting adhesive is provided between the top plate and the main circuit board, and a fixing adhesive is provided between the display panel and the top plate;
the display panel comprises a first polarizer, a first substrate, a second substrate and a second polarizer that are sequentially stacked in a direction away from the backlight module; a height of each component on the main circuit board is less than or equal to a first height, and the first height is a sum of a thickness of the heat-conducting adhesive, a thickness of the top plate, a thickness of the fixing adhesive, a thickness of the first substrate, and a thickness of the second substr

Assignees

• Chongqing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Yuan Qiong
• Luo Wencheng
• Li Zhi
• Zhang Hening
• Xiong Bowen
• Liao Ke
• Zhang Jinhong
• Ran Wei
• Wang Yu
• Quan Wenqi
• Cen Xin
• Chen Yao
• Yin Shengjie
• Sun Yansheng

Classifications

• G02B6/0055

  Reflecting element, sheet or layer · CPC title

• G02B6/0088 Primary

  of the light guide or other optical sheets in the package · CPC title

• G02B6/0073

  Light emitting diode [LED] · CPC title

• G02B6/0083 Primary

  Details of electrical connections of light sources to drivers, circuit boards, or the like · CPC title

• G02B6/0085

  Means for removing heat created by the light source from the package · CPC title