Patent ID: 11877077
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method for black level correction of image signals, the method comprising:
controlling a first transistor of each active image sensor pixel in a first set of active image sensor pixels using a first control scheme to generate a first set of image signals, wherein the first transistor is in a first state in the first control scheme;
controlling a second transistor of each active image sensor pixel in a second set of active image sensor pixels using a second control scheme to generate a second set of image signals, wherein the second transistor is in a second state in the second control scheme;
controlling at least some transistors of optically shielded image sensor pixels to be in the first state using the first control scheme to generate a first set of black level signals;
controlling at least some transistors of the optically shielded image sensor pixels to be in the second state using the second control scheme to generate a second set of black level signals;
performing black level correction operations for the first set of image signals using the first set of black level signal; and
performing additional black level correction operations for the second set of image signals using the second set of black level signals.