US 12,123,952 B2
Imaging system with time-of-flight sensing
Erez Tadmor, Atlit (IL)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Dec. 28, 2020, as Appl. No. 17/134,726.
Claims priority of provisional application 63/015,756, filed on Apr. 27, 2020.
Prior Publication US 2021/0333404 A1, Oct. 28, 2021
Int. Cl. G01S 17/894 (2020.01); G01S 7/4865 (2020.01); H04N 23/73 (2023.01)
CPC G01S 17/894 (2020.01) [G01S 7/4865 (2013.01); H04N 23/73 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A time-of-flight sensing system comprising:
an illumination source configured to emit a light pulse for a time-of-flight sensing operation;
pixels configured to receive reflected light resulting from the emitted light pulse and to generate charge in response to the reflected light during the time-of-flight sensing operation;
driver circuitry configured to control the pixels based on a sensor modulation signal having a modulation frequency during the time-of-flight sensing operation, wherein the illumination source is configured to emit additional light pulses, and the light pulse and the additional light pulses occur at a frequency less than the modulation frequency; and
processing circuitry configured to generate cross-correlation data based on the generated charge to identify time-of-flight information.