Patent ID: 11956553
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of operating an image sensor device, comprising:
turning on and off a plurality of first pixels at a first frequency, wherein each of the first pixels senses light emitted by one or more light-emitting diodes (LEDs) at a first quantum efficiency; and
turning on and off a plurality of second pixels at a second frequency that is less than the first frequency, wherein a number of the first pixels exceeds a number of the second pixels, wherein each of the second pixels senses light emitted by the one or more LEDs at a second quantum efficiency that is lower than the first quantum efficiency, and wherein the first frequency is at least multiple times greater than the second frequency;
wherein:
at least one of the second pixels remains turned on at any point in time during an operation of the image sensor device; or
at least a subset of the second pixels have overlapping periods during which the subset of the second pixels is all turned on, or all turned off.