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Backlight module and display device

A backlight module and grating technology, applied in optics, optical elements, diffraction gratings, etc., can solve the problem of increasing the thickness of the backlight module, and achieve the effect of being conducive to thin and light design, uniform light mixing, and realizing light output from the entire surface

Pending Publication Date: 2022-01-04
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Embodiments of the present invention provide a backlight module and a display device to solve the problem that the existing backlight module needs to set a larger light mixing distance or a larger number of diaphragms to achieve uniform light mixing, resulting in an increase in the thickness of the backlight module. technical problem

Method used

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  • Backlight module and display device
  • Backlight module and display device

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention. In addition, it should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. In the present invention, unless stated to the contrary, the used orientation words such as "up" and "down" usually refer to up and down in the actual use or working state of the device, specifically the direction of the drawing in the drawings ; while "inside" and "outside" refer to ...

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Abstract

The invention discloses a backlight module and a display device. The backlight module comprises a lamp panel assembly and a nano grating assembly; the lamp panel assembly comprises a lamp panel and a plurality of LED chips; the lamp panel comprises a plurality of first areas and a plurality of second areas; the nano grating assembly comprises a plurality of grating period units; each grating period unit comprises a plurality of sub-grating units; and the plurality of sub-grating units comprise a plurality of reflective sub-grating units and a plurality of transmissive sub-grating unit. According to the backlight module of the invention, the distribution density of the reflective sub-grating units corresponding to the first areas is greater than the distribution density of the transmissive sub-grating units corresponding to the first areas, so that most of emergent light is reflected to the position between the lamps; the distribution density of the reflective sub-grating units, corresponding to the second areas is smaller than the distribution density of the transmissive sub-grating units corresponding to the second areas, so that reflected light at the position between the lamps penetrates through the nano grating assembly; and thus, the effect of uniform light emitting of the whole face of the backlight module is achieved, and the light and thin design of the module is achieved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module and a display device. Background technique [0002] Mini light emitting diode (Mini light emitting diode, Mini LED) backlight module has attracted more and more attention due to its advantages of high brightness, high contrast ratio, low power consumption and high reliability. Mini LED backlight modules usually adopt a direct backlight lighting structure. In order to achieve uniform light mixing in the backlight module, generally a larger light mixing distance or a larger number of diaphragms are set. However, this design will cause the Mini LED backlight module to The increase in thickness is not conducive to the thinning and lightening of electronic products. Contents of the invention [0003] Embodiments of the present invention provide a backlight module and a display device to solve the problem that the existing backlight module needs to set a larger l...

Claims

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Application Information

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IPC IPC(8): G02F1/13357G02B5/18
CPCG02F1/133603G02F1/133606G02B5/1866G02B5/1861
Inventor 杨勇查国伟
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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