Title:
LIGHT-EMITTING ELEMENT DRIVE DEVICE AND OPTICAL RANGE-FINDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/010372
Kind Code:
A1
Abstract:
This light-emitting element drive device (100) for driving a light-emitting element (21) is provided with: a capacitor (C1) which is charged by a power supply (V1) and which is for supplying electric current to the light-emitting element; a first wiring (W1) for causing electric current to flow from the capacitor to the light-emitting element; a second wiring (W2) through which the electric current outputted from the light-emitting element is passed; a first switch (SW1) for switching the state of the capacitor to either a charging state in which the capacitor is charged by the power supply or a discharging state in which electric current is supplied from the capacitor to the light-emitting element; a diode (D1) which is reverse-connected with the first wring and the second wiring in parallel to the light-emitting element; and a resistive element (R2) which is connected in series with the diode.
Inventors:
NAKAJIMA MASATO (JP)
HOASHI YOSHIAKI (JP)
HOASHI YOSHIAKI (JP)
Application Number:
PCT/JP2020/027222
Publication Date:
January 21, 2021
Filing Date:
July 13, 2020
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01S7/484; H01S5/042
Domestic Patent References:
| WO2018066612A1 | 2018-04-12 |
Foreign References:
| US20180323576A1 | 2018-11-08 | |||
| JPH0540175A | 1993-02-19 | |||
| JP2017181062A | 2017-10-05 | |||
| CN110535028A | 2019-12-03 |
Attorney, Agent or Firm:
TOKKYO GYOMUHOJIN MEISEI INTERNATIONAL PATENT FIRM (JP)
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