Patent ID: 11922844
Assignee: NOVATEK MICROELECTRONICS CORP.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 32:
33. An integrated driving device, comprising:
a touch sensing circuit configured to perform touch sensing in a plurality of touch sensing periods during a first frame period; and
an optical sensing circuit configured to perform ambient light sensing during at least one ambient light sensing period during the first frame period to obtain optical sensing signals for generating first ambient light information,
wherein the plurality of touch sensing periods and the at least one ambient light sensing period are non-overlapping,
wherein the optical sensing circuit is further configured to:
start a fingerprint sensing cycle during a second frame period later than the first frame period, wherein a length of an exposure period of the fingerprint sensing cycle is determined according to the first ambient light information generated based on the ambient light sensing signals,
wherein the length of the exposure period is inversely related to a light intensity indicated by the first ambient light information.