Light emission device and distance measurement device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsKiyoshi MORIMOTO, Hirotaka UENO
Life of this patent
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Abstract
A light emission device includes: a laser light source; an electric storage element for supplying a drive current to the laser light source; a switch element connected in series to the laser light source; and a monitoring circuit configured to monitor temporal change in a voltage of the electric storage element.
Claims14
A light emission device comprising:
- a laser light source;
- an electric storage element for supplying a drive current to the laser light source;
- a switch element connected in series to the laser light source;
- and
- a monitoring circuit configured to monitor temporal change in a voltage of the electric storage element.
A distance measurement device comprising:
- a light emission device;
- a projection optical system configured to project pulsed light emitted from the light emission device, to a target region;
- and
- a light receiver configured to receive reflected light, from an object, of the pulsed light, wherein
- the light emission device includes
- a laser light source,
- an electric storage element for supplying a drive current to the laser light source,
- a switch element connected in series to the laser light source, and
- a monitoring circuit configured to monitor temporal change in a voltage of the electric storage element.
The distance measurement device according to claim wherein the monitoring circuit includes a polarity inversion circuit configured to invert a polarity of a voltage divided by the voltage-dividing resistor.
Dependencies are inferred from the claim text.