Backlight module and preparation method thereof

Abstract

The invention relates to a backlight module. The backlight module comprises a driving back plate; light-emitting units which are arranged on the upper surface of the driving back plate at intervals; adiffusion layer which is located on the light-emitting unit, and the diffusion layer comprises concave structures and convex structures which are arranged alternately; the center of the concave structure corresponds to the center of the light-emitting unit; and the center of the convex structure corresponds to the center of a gap between the adjacent light-emitting units. According to the backlight module, the convex structures and the concave structures are arranged on the diffusion layer, the centers of the concave structures correspond to the centers of the light-emitting units, the centers of the convex structures correspond to the centers of the gaps between the light-emitting units, and therefore light which is close to the light-emitting units and high in intensity can be emitted after being diffused through the concave structures; according to the backlight module, the light which is far away from the light-emitting unit and low in intensity is gathered through the convex structure and then emitted, so that the light emitted by the light-emitting unit is emitted more uniformly after passing through the diffusion layer, and uniformity of the light-emitting brightness of thebacklight module is improved.

Description

technical field [0001] The invention relates to backlight display technology, in particular to a backlight module and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of science and technology and the diversification of application requirements, various outdoor and indoor display applications have put forward higher requirements for the resolution, contrast and color management of the display screen. Traditional LCD screens have been unable to to satisfy the market's needs. As a new type of display technology, Mini LED technology has attracted the attention of the industry, and has become a technology hotspot that major manufacturers at home and abroad are scrambling to pursue. Its main development direction is mini LED display and mini LED backlight module. Mini LED technology has played a very important role in the realization of high dynamic range display and ultra-narrow borderless display. However, in the actual ap...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a backlight module and its preparation method for the problem of how to improve the uniformity of the brightness of the backlight partitions of Mini LED products.

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