Title:
LIGHT-EMITTING ELEMENT DRIVE DEVICE AND OPTICAL RANGING DEVICE
Document Type and Number:
Japanese Patent JP2021019194
Kind Code:
A
Abstract:
To provide a light-emitting element drive device capable of suppressing secondary emission of a light-emitting element due to parasitic inductance of wiring.SOLUTION: A light-emitting element drive device 100 for driving a light-emitting element 21 includes: a capacitor C1 for supplying electric current to the light-emitting element, the capacitor being charged by a power supply V1; first wiring W1 for causing electric current to flow from the capacitor to the light-emitting element; second wiring W2 through which the electric current output from the light-emitting element flows; 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 wiring and the second wiring, in parallel to the light-emitting element; and a resistive element R2 which is connected in series with the diode.SELECTED DRAWING: Figure 5
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Inventors:
NAKAJIMA MASATO
HOASHI YOSHIAKI
HOASHI YOSHIAKI
Application Number:
JP2020117647A
Publication Date:
February 15, 2021
Filing Date:
July 08, 2020
Export Citation:
Assignee:
DENSO CORP
International Classes:
H01S5/042; G01S7/484
Domestic Patent References:
| JP2015035907A | 2015-02-19 | |||
| JP2017020841A | 2017-01-26 | |||
| JPH0540175A | 1993-02-19 |
Foreign References:
| US20180323576A1 | 2018-11-08 | |||
| WO2018125825A1 | 2018-07-05 | |||
| WO2018066612A1 | 2018-04-12 | |||
| CN110535028A | 2019-12-03 |
Attorney, Agent or Firm:
Meisei International Patent Office