Direct-type backlight module and making method thereof

Abstract

The invention provides a direct-type backlight module and a making method thereof. The direct-type backlight module comprises a driving substrate, a reflecting layer arranged on the driving substrate,multiple Mini-LEDs distributed on the reflecting layer through arrays, multiple reflecting protruding points distributed on the reflecting layer at intervals and located between all the Mini-LEDs andoptical film groups arranged on the Mini-LEDs, the reflecting protruding points and the reflecting layer, wherein the multiple Mini-LEDs are electrically connected with the driving substrate; the reflecting layer is arranged on the driving substrate, the multiple reflecting protruding points are arranged on the reflecting layer, and through the multiple reflecting protruding points, a light extraction net point structure is formed; light rays are scattered to different angles through the light extraction net point structure, and the light outgoing efficiency of the backlight module is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a direct-lit backlight module and a manufacturing method thereof. Background technique [0002] With the development of display technology, liquid crystal displays (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, televisions, personal Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices. [0003] Most of the liquid crystal display devices currently on the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates. The direction of the liquid ...

AI Technical Summary

Problems solved by technology

Different from the light guide plate backlight system of the side-lit backlight, the Mini-LED direct-down backlight module has no light guide plate design, but returns light by coating white reflective ink (that is, white oil) on the driving substrate. The reflective properties of white oil make the reflected light and the incident light usually have the same angle, either re-enter the brightness enhancement film after reflection and be fully reflected back again, or be reflected to the low reflection area of ​​the driving substrate (such as the surface of Mini-LED, Mini- The space between the LED and the white oil) is lost, resulting in a large loss in the overall light return efficiency, and the light output efficiency is not high

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