公开(公告)号：US20210036483A1

公开(公告)日：2021-02-04

申请号：US17043281

申请日：2018-09-27

Applicant: GOERTEK INC.

Inventor： Lebao YANG ,  Xianbin WANG

IPC: H01S3/131 ,  H01S3/13 ,  H01S3/10 ,  H01S3/23 ,  G03B21/20

Abstract: The present invention discloses a driving current correction method and apparatus for multiple laser devices, and a laser projector. A specific embodiment of the method includes in a projection period of a nth pixel point: sequentially driving a plurality of laser devices of a laser source to emit laser, and respectively detecting light intensity information of lasers emitted from the plurality of laser devices by using a light sensor; acquiring an actual light intensity of the lasers emitted from the plurality of laser devices according to an electric signal output by the light sensor, and establishing a corresponding relation between a driving current and an actual light intensity of each laser device according to the driving current of the each laser device and the actual light intensity of the laser emitted from the each laser device when the n-th pixel point is projected; from a projection of a (n+1)-th pixel point: correcting the driving current of the each laser device according to a set light intensity of the each laser device and the corresponding relation between the driving current and the actual light intensity of the each laser device. The implementation has a high consistency of detecting light intensity information that can be simply performed.

公开(公告)号：US20210364903A1

公开(公告)日：2021-11-25

申请号：US17051885

申请日：2018-09-27

Applicant: GOERTEK INC.

Inventor： Lebao YANG ,  Xianbin WANG

IPC: G03B21/20

Abstract: The present invention discloses a driving current correction method and apparatus for multiple laser devices, and a laser projector, A specific embodiment of the method includes in projection periods of n-th to (n+m−1)-th pixel points: detecting light intensity information of a combined laser after being combined lasers emitted from in laser devices in a laser source by using a light sensor, and respectively acquiring actual light intensities of combined lasers when the n-th to the (n+m−1)-th pixel points are projected according to an electric signal output by the light sensor, a number of the laser devices in the laser source being m; establishing a system of linear equations with in variables according to a driving current of each laser device and the actual light intensities of the combined lasers when the n-th to the (n+m−1)-th pixel points are projected, and solving a corresponding relation between the driving current of the each laser device and an actual light intensity of the laser emitted from the each laser device; from a projection of a (n+m)-th pixel point: correcting the driving current of the each laser device according to a set light intensity of the each laser device and the corresponding relation between the driving current of the each laser device and the actual light intensity of the laser emitted from the each laser device. The implementation has a high consistency of detecting light intensity information that can be simply performed.