US 12,248,099 B2
Device for operating a light source for the optical time-of-flight measurement
Ralf Beuschel, Wangen (DE)
Assigned to Microvision, Inc., Redmond, WA (US)
Appl. No. 17/415,533
Filed by Microvision, Inc., Redmond, WA (US)
PCT Filed Dec. 16, 2019, PCT No. PCT/EP2019/085302
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/127013, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 10 2018 222 049.2 (DE), filed on Dec. 18, 2018.
Prior Publication US 2022/0057493 A1, Feb. 24, 2022
Int. Cl. G01S 7/48 (2006.01); G01S 7/4861 (2020.01); G01S 7/4865 (2020.01); G01S 17/10 (2020.01); G01S 17/894 (2020.01)
CPC G01S 7/4865 (2013.01) [G01S 7/4861 (2013.01); G01S 17/10 (2013.01); G01S 17/894 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A device for operating a light source for an optical time-of-flight measurement, comprising:
a light source, which is configured to emit light pulses according to a pulse signal sequence; and
a monitoring circuit for monitoring a light output emitted by the light source based on a current signal and/or a voltage signal of the light source, wherein the monitoring circuit is configured to deactivate or not to activate the light source when the emitted light output exceeds a threshold value, wherein the monitoring circuit comprises first transducer for a first time-correlated scanning of the current signal from the light source, and a second transducer for a second time-correlated scanning of the voltage signal from the light source.