Backlight module and display apparatus thereof

Abstract

A backlight module includes a frame, a lamp panel, a reflector, and an optical film. The lamp panel is housed within the frame and has a plurality of light-emitting diodes (LEDs). The reflector has a plurality of grid portions and a plurality of optical filling layers. The reflector is stacked on the lamp panel, and the plurality of grid portions respectively separate the plurality of LEDs. The plurality of optical filling layers respectively fill the plurality of grid portions. The plurality of optical filling layers are composed of a high-transmittance optical adhesive, and the plurality of grid portions are made of a light-reflective material. The optical film is disposed within the frame. Light emitted by the plurality of LEDs is conducted through the plurality of optical filling layers and exits from the plurality of grid portions, then incident on the optical film.

Claims

1. A backlight module comprising: a frame; a lamp plate housed within the frame and having a plurality of light-emitting diodes; a reflector having a plurality of grid portions and a plurality of optical filling layers, the reflector being stacked on the lamp plate and the plurality of grid portions respectively separating the plurality of light-emitting diodes, the plurality of optical filling layers respectively filling the plurality of grid portions, the plurality of optical filling layers being composed of optical adhesive with high light transmittance, the plurality of grid portions being light-reflective material; and at least one optical film disposed within the frame; wherein light emitted by the plurality of light-emitting diodes is conducted through the plurality of optical filling layers and exits from the plurality of grid portions, and is incident on the at least one optical film.

2. The backlight module as claimed in claim 1, wherein a light guide layer is coated on the top surface of one of the grid-like inner wall structures of the plurality of grid portions, the light guide layer being composed of an optical adhesive material with high light reflectivity.

3. The backlight module as claimed in claim 1, wherein a support post protrudes from a top corner intersection area between at least one of the plurality of grid portions and an adjacent grid portion, the support post being composed of an optical adhesive material, the support post supporting the at least one optical film.

4. The backlight module as claimed in claim 1, wherein the reflector forms a support wall around the periphery of the plurality of grid portions, the support wall supporting the at least one optical film.

5. The backlight module as claimed in claim 1, wherein at least one of the plurality of grid portions forms a recessed space between itself and the lamp panel to accommodate the optical adhesive that constitutes the optical filling layer.

6. The backlight module as claimed in claim 1, wherein at least one of the plurality of grid portions comprises: at least one first sub-inner wall adjacent to at least one of the plurality of light-emitting diodes; and at least one second sub-inner wall located between the at least one first sub-inner wall and the at least one optical film; wherein the at least one first sub-inner wall has a first tilt angle relative to the lamp panel, the at least one second sub-inner wall has a second tilt angle relative to the lamp panel, and the first tilt angle is greater than the second tilt angle.

7. The backlight module as claimed in claim 1, wherein the optical filler layer has a hemispherical surface, an elliptical surface, a flat-top surface, a diffusion textured surface, or a microlens structure surface.

8. A display device comprising: a backlight module, comprising: a frame having a light emission port; a lamp plate housed within the frame and having a plurality of light-emitting diodes; a reflector having a plurality of grid portions and a plurality of optical filling layers, the reflector being stacked on the lamp plate and the plurality of grid portions respectively separating the plurality of light-emitting diodes, the plurality of optical filling layers respectively filling the plurality of grid portions, the plurality of optical filling layers being composed of optical adhesive; and at least one optical film disposed within the frame; and a display panel disposed at the light emission port of the frame; wherein light emitted by the plurality of light-emitting diodes is conducted through the plurality of optical filling layers and emitted from the plurality of grid portions, incident on the at least one optical film, and then illuminates the display panel.

9. The display device as claimed in claim 8, wherein a light guide layer is coated on the top surface of one of the grid-like inner wall structures of one of the plurality of grid portions, the thickness of the light guide layer being between 0.2 mm and 0.5 mm, and a gap exists between the light guide layer and the at least one optical film, the gap distance being between 0.5 mm and 1.5 mm.

10. The display device as claimed in claim 8, wherein the plurality of optical filling layers have a transmittance of more than 95% and a refractive index between 1.41 and 1.43.

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