Backlight module and display device

• US 10,078,177 B2
• Filed: 05/25/2016
• Issued: 09/18/2018
• Est. Priority Date: 05/10/2016
• 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: Guo, Qing, Han, Mei, Cheng, Yan
• Primary Examiner(s): Truong, Bao Q
• Application Number:
  US15/109,392
• Publication Number:
  US 20180106957A1
• Time in Patent Office: 846 Days
• 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 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: G02F 2203/055 wavelength filtering

Abstract

The present invention provides a backlight module, including a plastic frame, a light guide plate, a reflective sheet, a backlight lamp and an optical film, wherein the light guide plate and the optical film are sequentially overlapped and disposed on the reflective sheet; the plastic frame surrounds the light guide plate and the optical film, and a peripheral edge of the plastic frame is provided and received with the backlight lamp; the backlight module also includes a quantum dot film; an inner circumferential surface of the plastic frame is provided with a green compensation layer; the backlight lamp is located between a light incident surface of the light guide plate and the plastic frame; the quantum dot film is overlapped on the light guide plate, and is located between the light guide plate and the optical film. A display panel is also disclosed.

Claims

1. A backlight module, comprising a plastic frame, a light guide plate, a reflective sheet, a backlight lamp and an optical film, wherein the light guide plate and the optical film are sequentially overlapped and disposed on the reflective sheet;

the plastic frame surrounds the light guide plate and the optical film, and a peripheral edge of the plastic frame is provided and received with the backlight lamp;

the backlight module also includes a quantum dot film;

the backlight lamp is located between a light incident surface of the light guide plate and the plastic frame;

the quantum dot film is overlapped on the light guide plate, and is located between the light guide plate and the optical film;

wherein the backlight lamp includes a circuit board and a blue LED, the blue LED is installed on the circuit board and faced toward the light incident surface, and the blue LED provides with a blue light;

wherein the plastic frame is green to provide with a reflective green light after being illuminated by the blue LED; and

wherein the reflective green light provided by the plastic frame and the blue light provided by the blue LED are mixed at an edge of the quantum dot film to generate a white light at the edge of the quantum dot film.

2. The backlight module according to claim 1, wherein, a material of the plastic frame is green polycarbonate (PC), and a material of the green compensation layer is the same as the plastic frame and the green compensation layer and the plastic frame are formed integrally.

3. The backlight module according to claim 1, wherein, the green compensation layer is adhered to or coated on the inner circumferential surface of the plastic frame, or the green compensation layer is doped inside the plastic frame to be integrally formed with the plastic frame;

a material of the green compensation layer is green polyethylene terephthalate (PET), green polyimide (PI) or green phosphor.

4. The backlight module according to claim 1, wherein, the light guide plate further includes a light-emitting surface and a bottom surface, the light-incident surface is connected with the light-emitting surface and the bottom surface.

5. A display device comprising a liquid crystal display module and a backlight module, and the backlight module comprises:

a plastic frame, a light guide plate, a reflective sheet, a backlight lamp and an optical film, wherein the light guide plate and the optical film are sequentially overlapped and disposed on the reflective sheet;

the plastic frame surrounds the light guide plate and the optical film, and a peripheral edge of the plastic frame is provided and received with the backlight lamp;

the backlight module also includes a quantum dot film;

the backlight lamp is located between a light incident surface of the light guide plate and the plastic frame;

the quantum dot film is overlapped on the light guide plate, and is located between the light guide plate and the optical film;

wherein the backlight lamp includes a circuit board and a blue LED, the blue LED is installed on the circuit board and faced toward the light incident surface, and the blue LED provides with a blue light;

wherein the plastic frame is green to provide with a reflective green light after being illuminated by the blue LED; and

wherein the reflective green light provided by the plastic frame and the blue light provided by the blue LED are mixed at an edge of the quantum dot film to generate a white light at the edge of the quantum dot film.

6. The display device according to claim 5, wherein, a material of the plastic frame is green polycarbonate (PC), the green compensation layer is the inner circumferential surface of the plastic frame or the plastic frame itself.

7. The display device according to claim 5, wherein, the green compensation layer is adhered to or coated on the inner circumferential surface of the plastic frame, or the green compensation layer is doped inside the plastic frame to be integrally formed with the plastic frame;

a material of the green compensation layer is green polyethylene terephthalate (PET), green polyimide (PI) or green phosphor.

8. The display device according to claim 5, wherein, the light guide plate further includes a light-emitting surface and a bottom surface, the light-incident surface is connected with the light-emitting surface and the bottom surface.