Flexible straight-down backlight device and display equipment

Abstract

The invention discloses a flexible straight-down backlight device. The device comprises an optical diaphragm group and a mini-LED lamp panel which are arranged from top to bottom. The mini-LED lamp panel comprises a flexible polyimide film, a mini-LED chip and a fluorescent layer for packaging the mini-LED chip. The lower surface of the optical film group is provided with a first reflection structure, and the first reflection structure is corresponding to the mini-LED chip. The mini-LED lamp panel further comprises a second reflection structure, and the second reflection structure and the first reflection structure are arranged in a staggered mode so visible light can be evenly emitted to the light emitting side of the flexible straight-down backlight device after being reflected by the first reflection structure and the second reflection structure multiple times. According to the invention, flexible backlight can be realized, uniform light emission of the flexible surface light sourceis improved, and the utilization efficiency of light is improved.

Description

technical field [0001] The invention relates to a display device, in particular to a flexible direct-lit backlight device and a display device. Background technique [0002] With the rapid development of display technology, people's demand for displays is getting higher and higher, especially for non-planar display devices such as flexible liquid crystal displays, curved liquid crystal displays, flexible liquid crystal displays and foldable liquid crystal displays. Flexible LCD panels are about to become the mainstream in the display field due to their thinness, bendability, and impact resistance. However, the liquid crystal display device is a non-self-luminous display device, which needs to be matched with a backlight to realize display, which greatly increases the difficulty of flexible display. How to realize flexible backlighting has always been a difficult problem to solve. [0003] The direct-type backlight module is directly arranged behind the liquid crystal displ...

AI Technical Summary

Problems solved by technology

Different from the light guide plate backlight system of side-lit backlight, the direct backlight module using Mini-LED generally returns light by coating white reflective ink (that is, white oil) on the driving substrate. Due to the reflective characteristics of white oil The reflected light and the incident light usually have the same angle, either after reflection, re-enter the brightness enhancement film and be fully reflected back again, or be reflected to the low reflection area of ​​the driving substrate (such as the space between the surface of the Mini-LED and the white oil area) is lost, resulting in a large loss in the overall light return efficiency, and the light output efficiency is not high

These flexible Mini-LED backlight technologies are difficult to implement. On the one hand, they are out of touch with the traditional backlight technology. On the other hand, the manufacturing cost is high and the yield rate is low.

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