Patent ID: 11901700
Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 18:
19. A driving method implemented by a driving device, the driving method comprising:
setting at least one of a bias current of a light-emitting element or a target current for setting output light from the light-emitting element to desired intensity on a basis of a result of detection of an offset light amount when the light-emitting element does not emit light, the detection being performed by a light-receiving element that receives a portion of the output light; and
controlling an output of a driving current of the light-emitting element on a basis of at least one of the set bias current or the set target current wherein
controlling the output of the driving current uses a current mirror circuit having a variable current mirror ratio, and controls an output of a driving current in which an output current of the current mirror circuit and the bias current are added up, and
the current mirror ratio is reduced when an output of the output current is started.