Backlight module and MiniLED display device

Abstract

The invention relates to a backlight module and a Mini LED display device, and belongs to the technical field of display devices.The backlight module comprises a back plate, a plurality of circuit substrates distributed in an array mode, a plurality of light-emitting bodies arranged on the circuit substrates, a diffusion plate, a first optical film layer and a second optical film layer, a first printing ink pattern is arranged at the position, corresponding to the luminous bodies, of the first optical film layer, a second printing ink pattern is arranged at the position, corresponding to the luminous bodies, of the second optical film layer, projection parts, in a reference plane, of the first printing ink pattern and the second printing ink pattern corresponding to each luminous body are overlapped, and the overlapped areas are opposite to the corresponding luminous bodies; the reference plane is parallel to the first optical film layer and/or the second optical film layer. According to the backlight module, the thickness of the diffusion plate can be correspondingly reduced, the light mixing distance is shortened, and the Mini LED display device can be wholly thinned.

Description

Technical field [0001] The present application relates to the field of display technology, in particular to a backlight module and a MiniLED display device. Background [0002] MiniLED display device is the application of MiniLED backlight technology thin film transistor liquid crystal display, generally by thousands of micro LED soldering are distributed on the circuit substrate, the current circuit substrate only supports small size, so as a large size of the backlight module, often need a plurality of circuit substrates to splice into the corresponding large size of the circuit substrate, in order to form a high-brightness uniform distribution and can be independently partitioned control of the surface light source. In order to thermally expand and contract the circuit substrate, it is often reserved for space, and there will be a gap between the two adjacent MiniLED circuit substrates, so that there will be a dark area at the seam because there is no luminous body. Due to the...

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Problems solved by technology

Due to the high brightness of the center of the LED, if the dot matrix effect of the illuminant needs to be weakened, the light mixing effect needs to be enhanced, and the enhancement means that the thickness of the diffusion plate needs to be increased, and the increase in the thickness of the diffusion plate will inevitably lead to the overall thickness of the Mini LED display device. Increase, in order to avoid uneven display, generally use a thicker diffuser plate, or multiple diffuser films, and increase the light mixing distance, making the module thicker

This is not in line with the existing trend of ultra-thin Mini LED display devices. In the prior art, the ink layer is also used to enhance the light mixing effect, but the printing of the ink layer is complicated and the light mixing effect is poor.

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