US 11,965,968 B2
Optical sensing system and optical sensing method
Zi Hao Tan, Penang (MY); Joon Chok Lee, Penang (MY); Keen-Hun Leong, Penang (MY); and Sai Mun Lee, Penang (MY)
Assigned to PixArt Imaging Inc., Hsin-Chu (TW)
Filed by PixArt Imaging Inc., Hsin-Chu (TW)
Filed on Dec. 3, 2020, as Appl. No. 17/110,315.
Prior Publication US 2022/0179086 A1, Jun. 9, 2022
Int. Cl. G01C 3/08 (2006.01); G01S 7/4861 (2020.01); G01S 7/4865 (2020.01); G01S 17/894 (2020.01)
CPC G01S 17/894 (2020.01) [G01S 7/4861 (2013.01); G01S 7/4865 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An optical sensing system, comprising:
a processing circuit;
an optical sensor, configured to sense first optical data respectively in first sensing time intervals; and
a TOF (Time of Flight) optical sensor, configured to sense second optical data respectively in second sensing time intervals;
wherein the processing circuit computes a distance between a first object and the optical sensing system according to the second optical data;
wherein the first sensing time intervals do not overlap with the second sensing time intervals;
wherein the second sensing time intervals are set based on triggering of start of the first sensing time intervals;
wherein the second sensing time intervals are set according to a first set time interval, a second first set time interval, and an initialization time interval;
wherein the first set time interval starts at a start time of the first sensing time interval and is larger than the first sensing time interval;
wherein the initialization time interval, which is a time interval in which the TOF optical sensor completes preparation of sensing the second optical data, is after the first set time interval;
wherein the second set time interval starts after the initialization time interval, larger than the second optical sensing time interval and covers the second optical sensing time interval.