Title:
ILLUMINATION DEVICE, ILLUMINATION DEVICE CONTROL METHOD, AND DISTANCE MEASUREMENT MODULE
Document Type and Number:
WIPO Patent Application WO/2021/065542
Kind Code:
A1
Abstract:
This invention relates to an illumination device, an illumination device control method, and a distance measurement module that make it possible to reduce cyclic error. The illumination device comprises a plurality of light sources including a first light source and a second light source and a drive unit for driving the plurality of light sources. The drive unit causes the first light source and the second light source to emit light at different times and for different light emission periods such that the intensity of the light emitted by the plurality of light sources is symmetrical in the time direction around the peak value or minimum value of the intensity within the time width of one cycle. This invention can be applied to, for example, a distance measurement module for measuring the distance to a subject.
Inventors:
HANNURKAR JAYESH (JP)
Application Number:
PCT/JP2020/035275
Publication Date:
April 08, 2021
Filing Date:
September 17, 2020
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
G01S7/484; G01S17/26; H05B47/155
Foreign References:
| JP2006021720A | 2006-01-26 | |||
| JP2010190675A | 2010-09-02 | |||
| US20150304534A1 | 2015-10-22 | |||
| JP2013076645A | 2013-04-25 | |||
| JP2018124216A | 2018-08-09 | |||
| JP2016132235A | 2016-07-25 | |||
| JP2015018981A | 2015-01-29 |
Other References:
See also references of EP 4040186A4
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
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