US 12,422,528 B2
Light emitting device, photo-detection system, and vehicle
Kazuya Hisada, Nara (JP); Yasuhisa Inada, Osaka (JP); and Yumiko Kato, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Dec. 7, 2021, as Appl. No. 17/544,750.
Application 17/544,750 is a continuation of application No. PCT/JP2020/029911, filed on Aug. 5, 2020.
Claims priority of application No. 2019-162292 (JP), filed on Sep. 5, 2019.
Prior Publication US 2022/0099809 A1, Mar. 31, 2022
Int. Cl. G01S 7/481 (2006.01); G01S 17/36 (2006.01); G01S 17/89 (2020.01); G01S 17/931 (2020.01); G02F 1/295 (2006.01)
CPC G01S 7/4817 (2013.01) [G01S 17/36 (2013.01); G01S 17/89 (2013.01); G02F 1/295 (2013.01); G01S 17/931 (2020.01)] 13 Claims
OG exemplary drawing
 
1. A light emitting device comprising:
a light source that emits an optical beam toward a scene in response to a control signal inputted to the light source;
an optical deflector that changes a direction of the optical beam in response to a driving voltage inputted to the optical deflector; and
a control circuit that controls a timing of emission of the optical beam and the direction of the optical beam by inputting the control signal to the light source and inputting the driving voltage to the optical deflector, wherein:
the optical deflector is configured to change the direction of the optical beam along a first direction and a second direction different from the first direction,
a rate of change in the direction of the optical beam along the first direction is lower than a rate of change in the direction of the optical beam along the second direction,
the control circuit acquires a position or positions of one or more physical objects included in the scene, and
in a period of time during which a component of the direction of the optical beam acting in the first direction is being periodically changed by the driving voltage, the control circuit changes, when the control circuit determines that the optical beam is to be located on the position or the positions of the one or more physical objects acquired by the control circuit, a component of the direction of the optical beam acting in the second direction.