Flexible straight-down backlight device and display equipment

A backlight device, direct type technology, applied in nonlinear optics, optics, instruments, etc., can solve the problems of difficult implementation of flexible Mini-LED backlight technology, low light output efficiency, loss of return light efficiency, etc., to improve light output uniformity. and light energy utilization efficiency, overcome the uneven brightness and darkness, and expand the effect of diffusion angle

Inactive Publication Date: 2020-06-26
SHENZHEN LONGLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Flexible straight-down backlight device and display equipment
  • Flexible straight-down backlight device and display equipment
  • Flexible straight-down backlight device and display equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First, through Figure 1-3, the flexible direct-lit backlight device according to Embodiment 1 of the present invention will be described. One technical solution adopted by the present invention is to provide a flexible direct-lit backlight device, which includes an optical film set 101 , a mini-LED lamp board 102 and an FPC drive board 103 arranged from top to bottom. The FPC driving board 103 is electrically connected to the mini-LED lamp board 102 . The mini-LED light board 102 includes a flexible polyimide film 1021 , a mini-LED chip 1022 and a fluorescent layer 1023 encapsulating the mini-LED chip 1022 . Such as figure 2 As shown, the lower surface of the optical film group 101 is provided with a first reflective structure 1001 , and the first reflective structure 1001 corresponds to the mini-LED chip 1022 . The mini-LED lamp panel 102 also includes a second reflective structure 1024, and the second reflective structure 1024 is arranged alternately with the fir...

Embodiment 2

[0042] Please refer to Figure 4 , is a partial cross-sectional view of the mini-LED lamp panel of the flexible direct-lit backlight device according to Embodiment 2 of the present invention. Only the differences between Embodiment 2 and Embodiment 1 will be described below, and the similarities will not be repeated here.

[0043] The second reflective structure 1024 is disposed on the side between the mini-LED chip 1022 and the fluorescent layer 1023 . The fluorescent layer 1023 replaces the function of the protective protrusions to increase the optical path of the reflected light, and the fluorescent layer 1023 is filled with diffusion particles.

Embodiment 3

[0045] Please refer to Figure 5 , is a partial cross-sectional view of the mini-LED lamp panel of the flexible direct-lit backlight device according to Embodiment 3 of the present invention. In the following, only the differences between Embodiment 3 and Embodiment 1 will be described, and the similarities will not be repeated here.

[0046] The second reflective structure 1024 is disposed on the lower side of the mini-LED chip 1022 . Likewise, this setting increases the distance between the first reflective structure 1001 and the second reflective structure 1024, further increases the optical distance and efficiency of light mixing, and improves the uniformity of light output. The fluorescent layer 1023 replaces the function of the protective protrusions to increase the optical path of the reflected light, and the fluorescent layer 1023 is filled with diffusion particles.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357
CPCG02F1/133603G02F1/133605G02F1/133606G02F1/133607G02F1/133614
Inventor 张小齐肖亮黄小芸
Owner SHENZHEN LONGLI TECH CO LTD
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