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Title:
MULTI-LASER DRIVE CURRENT CORRECTION METHOD AND APPARATUS, AND LASER PROJECTOR
Document Type and Number:
WIPO Patent Application WO/2019/214146
Kind Code:
A1
Abstract:
Disclosed are a multi-laser drive current correction method and apparatus, and a laser projector. One specific embodiment of the method comprises: within a projection time period of an nth pixel point: sequentially driving a plurality of lasers of a laser light source to emit laser lights, and using a light sensor to respectively sense light intensity information of the laser lights emitted by the plurality of lasers; according to an electrical signal outputted by the light sensor, obtaining actual light intensities of the laser lights emitted by the plurality of lasers, and according to a drive current of each laser and the actual light intensity of the laser light emitted by each laser during the projection of the nth pixel point, establishing a corresponding relationship between the drive current and the actual light intensity of each laser; starting from the projection of an nth+1 pixel point: according to a set light intensity of each laser and the corresponding relationship between the drive current and the actual light intensity of 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.

Inventors:
YANG, Lebao (No.268 Dongfang Road, Hi-Tech Industry District WeifangWeifang, Shandong 1, 261031, CN)
WANG, Xianbin (No.268 Dongfang Road, Hi-Tech Industry District WeifangWeifang, Shandong 1, 261031, CN)
Application Number:
CN2018/107867
Publication Date:
November 14, 2019
Filing Date:
September 27, 2018
Export Citation:
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Assignee:
GOERTEK INC. (No.268 Dongfang Road, Hi-Tech Industry District WeifangWeifang, Shandong 1, 261031, CN)
International Classes:
H01S3/102; G03B21/20; H01S5/06; H04N9/31
Foreign References:
CN108646509A2018-10-12
CN108666861A2018-10-16
CN101897191A2010-11-24
CN107728410A2018-02-23
CN101540920A2009-09-23
CN104038747A2014-09-10
Attorney, Agent or Firm:
BEIJING JANLEA PATENT AGENCY CO., LTD. (Room 1503, 15th Floor Tower A, Wuhua Mansion, A4 Chegongzhuang Avenue,Xicheng District, Beijing 4, 100044, CN)
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