Patent ID: 11942754
Assignee: GOER OPTICAL TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A driving current correction apparatus for multiple laser devices, comprising:
a laser driver, configured to sequentially drive a plurality of laser devices of a laser source to emit laser in a projection period of a single pixel point;
a light sensor, configured to respectively detect light intensity information of lasers emitted from the plurality of laser devices;
a data processor, configured to, in a projection period of a n-th pixel point, acquire an actual light intensity of the lasers emitted from the plurality of laser devices according to the electric signal output by the light sensor, and establish 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 laser emitted from the each laser device when the n-th pixel point is projected; generate and transmit a driving current correction signal to the laser driver 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 each laser device from a projection of a (n+1)-th pixel point; and
a memory, configured to store the corresponding relation between the driving current and the actual light intensity of the each laser device,
wherein the corresponding relation between the driving current and the actual light intensity of the each laser is a linear relationship and the (n+1)-th pixel point is a pixel point next to the n-th pixel point in a scanning direction.