Backlight module and display device

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...

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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

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