MULTI-LASER DRIVE CURRENT CORRECTION METHOD AND APPARATUS, AND LASER PROJECTOR

WIPO Patent Application WO/2019/214147

A1

A multi-laser drive current correction method and apparatus, and a laser projector. The method comprises: within a projection time period of nth to n+mth-1 pixel points: using a light sensor to sense light intensity information of a combined laser light of laser lights emitted by m lasers in a laser light source, and according to an electrical signal outputted by the light sensor, respectively obtaining an actual light intensity of the combined laser light during the projection of the nth to n+mth-1 pixel points; according to a drive current of each laser and the actual light intensity of the combined laser light during the projection of the nth to n+mth-1 pixel points, establishing an m-ary linear equation set, and solving a corresponding relationship between the drive current of each laser and an actual light intensity of the laser light emitted by each laser; starting from the projection of an n+mth pixel point, according to a set light intensity of each laser and the corresponding relationship between the drive current of each laser and the actual light intensity of the laser light emitted by each laser, correcting the drive current of each laser. The implementation mode is simple and easy, and the consistency of the sensed light intensity information is high.

YANG LEBAO (CN)
WANG XIANBIN (CN)

PCT/CN2018/107868

November 14, 2019

September 27, 2018

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GOERTEK INC (CN)

G03B21/20

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CN201464785U	2010-05-12
CN105911807A	2016-08-31
US20130063705A1	2013-03-14

BEIJING JANLEA PATENT AGENCY CO., LTD. (CN)

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