Title:
DISTANCE MEASURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/245034
Kind Code:
A1
Abstract:
In a distance measuring device provided with a light emitting unit 80, a light detector 1, and a distance measuring unit 90, the light detector is provided with: a detecting unit 10 which is provided with a detection SPAD 2, and a quenching element 4 connected in series therewith, and which outputs a photon detection signal from a point of connection between the detection SPAD 2 and the quenching element 4; a monitoring SPAD 12 having the same characteristics as the detection SPAD; a current source 14 which supplies a constant current to the monitoring SPAD to drive the same in a Geiger mode; and a drive unit 20 which sets and applies an electric potential between the two ends of a series circuit comprising the detection SPAD and the quenching element, on the basis of electric potentials at both ends of the monitoring SPAD or the electric potential on the current source side thereof.
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Inventors:
HATA TAKEHIRO (JP)
TACHINO YOSHIHIDE (JP)
TAKAI ISAMU (JP)
TACHINO YOSHIHIDE (JP)
TAKAI ISAMU (JP)
Application Number:
PCT/JP2019/024745
Publication Date:
December 26, 2019
Filing Date:
June 21, 2019
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01C3/06; G01S7/486; G01S7/497; H01L31/10; H01L31/107
Domestic Patent References:
| WO2017180277A1 | 2017-10-19 |
Foreign References:
| US20140231630A1 | 2014-08-21 | |||
| JP2012519843A | 2012-08-30 | |||
| JP2015078953A | 2015-04-23 | |||
| CN105988497A | 2016-10-05 | |||
| JP2016061729A | 2016-04-25 | |||
| JP2014216531A | 2014-11-17 | |||
| JP2013016638A | 2013-01-24 |
Attorney, Agent or Firm:
NAGOYA INTERNATIONAL PATENT FIRM (JP)
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