Title:
LED DISPLAY SCREEN
Document Type and Number:
WIPO Patent Application WO/2020/063700
Kind Code:
A1
Abstract:
An LED display screen (100), comprising: an LED array (20), consisting of multiple LED light-emitting units (2) and used for emitting a light; an optical diffusion film (40), provided at a light exit side of the LED array (20); a matrix shading frame (30), comprising multiple hollow shading gratings (3), the hollow shading gratings (3) corresponding one-to-one to the LED light-emitting units (2); and a substrate (1), used for supporting the LED array (20) and the matrix shading frame (30), where the light emitted by the LED light-emitting units (2), after running through the hollow shading gratings (3), is diffused to an audience side via the optical diffusion film (40), and the LED light-emitting units (2) emit the light towards the hollow shading gratings (3). The LED display screen (100) prevents external ambient lights from being shone to optical surfaces of the LED light-emitting units (2) and being reflected thereby, thus increasing the contrast of the LED display screen (100).
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Inventors:
WANG LIN (CN)
LI SHIJIE (CN)
HU FEI (CN)
SUN WEI (CN)
LI YI (CN)
LI SHIJIE (CN)
HU FEI (CN)
SUN WEI (CN)
LI YI (CN)
Application Number:
PCT/CN2019/107988
Publication Date:
April 02, 2020
Filing Date:
September 26, 2019
Export Citation:
Assignee:
APPOTRONICS CORP LTD (CN)
International Classes:
G09F9/33; G02F1/13357; H01L33/00
Foreign References:
| CN108257519A | 2018-07-06 | |||
| CN101515422A | 2009-08-26 | |||
| CN103165039A | 2013-06-19 | |||
| JP2012174371A | 2012-09-10 | |||
| JP2012174372A | 2012-09-10 |
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