LASER PROJECTION DEVICE

WIPO Patent Application WO/2023/030068

A1

A laser projection device (1000), comprising a light source assembly (1), an optical machine (2) and a lens (3). The light source assembly (1) comprises a bottom plate (1011), a side wall (1012) and multiple light-emitting chips (102). The side wall (1012) is disposed on the bottom plate (1011). An accommodating space (S) is defined between the side wall (1012) and the bottom plate (1011). The multiple light-emitting chips (102) are disposed on the bottom plate (1011), located in the accommodating space (S) and configured to emit a laser beam. The laser beam is emitted out of the accommodating space (S) in a direction away from the bottom plate (1011) to form an illumination light beam. An area of the bottom plate (1011) in the accommodating space (S) is divided into a first area and a second area, which meet at least one of the following: the number of the light-emitting chips (102) in the first area is less than the number of the light-emitting chips (102) in the second area; or the distribution density of the light-emitting chips (102) in the first area is less than the distribution density of the light-emitting chips (102) in the second area.

LI WEI (CN)
TIAN YOULIANG (CN)
LIU XIANRONG (CN)
ZHANG XIN (CN)
ZHOU ZINAN (CN)
LU YAO (CN)

PCT/CN2022/113950

March 09, 2023

August 22, 2022

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HISENSE LASER DISPLAY CO LTD (CN)

G03B21/20; H01S5/02253; H01S5/0232; H01S5/02345; H01S5/024

CN113872042A	2021-12-31
CN112909729A	2021-06-04
CN211203868U	2020-08-07
CN216162112U	2022-04-01
CN113703271A	2021-11-26
CN112283598A	2021-01-29
US20210134766A1	2021-05-06

BEIJING ZBSD PATENT & TRADEMARK AGENT LTD. (CN)

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