US 12,405,377 B2
Signal processing device, signal processing method, and distance-measuring module
Shun Kaizu, Kanagawa (JP); Hajime Mihara, Tokyo (JP); Takuro Kamiya, Kanagawa (JP); and Shuntaro Aotake, Kanagawa (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP); and SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 17/599,218
Filed by SONY GROUP CORPORATION, Tokyo (JP); and SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Mar. 19, 2020, PCT No. PCT/JP2020/012199
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/203331, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-072688 (JP), filed on Apr. 5, 2019.
Prior Publication US 2022/0179072 A1, Jun. 9, 2022
Int. Cl. G01C 3/08 (2006.01); G01S 13/89 (2006.01); G01S 17/32 (2020.01); G01S 13/93 (2020.01)
CPC G01S 17/32 (2013.01) [G01S 13/89 (2013.01); G01S 13/93 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A signal processing device comprising
an estimation unit that estimates, in a pixel including a first tap that detects a charge photoelectrically converted by a photoelectric conversion unit and a second tap that detects the charge photoelectrically converted by the photoelectric conversion unit, a sensitivity difference between taps of the first tap and the second tap by using first to fourth detection signals obtained by detecting reflected light generated by emission light reflected by an object in first to fourth phases with respect to the emission light,
wherein the estimation unit calculates an offset and a gain of the second tap with respect to the first tap as the sensitivity difference between taps, and
wherein the estimation unit is implemented via at least one processor.