Title:
LASER DRIVE DEVICE, SENSING MODULE, TIMING ADJUSTMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2021/019933
Kind Code:
A1
Abstract:
A laser drive device (41) that comprises a drive circuit (43) that, on the basis of a drive control signal, drives the light emission of a light-emitting element (40) that is a vertical-cavity surface-emitting laser, an assist circuit (42) that, on the basis of an assist control signal, short circuits both ends of the light-emitting element and thereby accelerates the fall time of the light-emitting element, a timing adjustment unit (20) that, on the basis of a timing adjustment signal, performs mutual timing adjustment of the drive control signal and the assist control signal, a phase detection unit (33) that detects the phase difference between the drive control signal and the assist control signal, and a timing control unit (34) that generates the timing adjustment signal on the basis of the phase difference detection results from the phase difference detection unit.
Inventors:
MASUDA TAKASHI (JP)
TABATA MITSUSHI (JP)
OKAMOTO KOICHI (JP)
TABATA MITSUSHI (JP)
OKAMOTO KOICHI (JP)
Application Number:
PCT/JP2020/023243
Publication Date:
February 04, 2021
Filing Date:
June 12, 2020
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
G01S7/484; H04N5/225; H01S5/062; H04N5/232
Domestic Patent References:
| WO2018211831A1 | 2018-11-22 |
Foreign References:
| JP2009236650A | 2009-10-15 | |||
| JP2008098657A | 2008-04-24 | |||
| JP2002101047A | 2002-04-05 |
Attorney, Agent or Firm:
IWATA, Masanobu et al. (JP)
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