Title:
DRIVING DEVICE, DRIVING METHOD, AND LIGHT-EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/039312
Kind Code:
A1
Abstract:
The present technology relates to a driving device, a driving method, and a light-emitting device that make it possible to suitably drive a light-emitting element. A driving device according to the present technology is provided with: a setting unit that performs setting for at least one of a bias current for a light-emitting element and a target current for setting light radiated from the light-emitting element to a desired intensity on the basis of the result of detecting, by a light-receiving element that receives a portion of the radiated light, an offset light level during a period in which the light-emitting element is not emitting light; and an output control unit that controls the output of a driving current for the light-emitting element on the basis of at least one of the set bias current and target current. For example, the present technology is applicable to a rangefinding module. The present invention relates to a driving device, a driving method, and a light-emitting device that make it possible to suitably drive a light-emitting element. A driving device according to the present invention is provided with: a setting unit (161) that performs setting for at least one of a bias current for a light-emitting element (LD121) and a target current for setting light radiated from the light-emitting element (LD121) to a desired intensity on the basis of the result of detecting, by a light-receiving element (PD122) that receives a portion of the radiated light, an offset light level during a period in which the light-emitting element (LD121) is not emitting light; and an output control unit (164) that controls the output of a driving current for the light-emitting element (LD121) on the basis of at least one of the set bias current and target current. For example, the present invention is applicable to a rangefinding module.
Inventors:
MASUMITSU NAOKI (JP)
DAIO KATSUHISA (JP)
KAMIEGAWA AKIHITO (JP)
YUWAKI TAKESHI (JP)
KUROKI SHOUICHI (JP)
KITADA MASATOSHI (JP)
KAMIZURU HAYATO (JP)
DAIO KATSUHISA (JP)
KAMIEGAWA AKIHITO (JP)
YUWAKI TAKESHI (JP)
KUROKI SHOUICHI (JP)
KITADA MASATOSHI (JP)
KAMIZURU HAYATO (JP)
Application Number:
PCT/JP2018/030019
Publication Date:
February 28, 2019
Filing Date:
August 10, 2018
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
G01S7/484; G01S7/4865; G01S7/497; G01S17/89; H01S5/062; G01S17/14; G01S17/894; G01S17/93
Foreign References:
| JPH11304470A | 1999-11-05 | |||
| JPH07294248A | 1995-11-10 | |||
| JP2011198877A | 2011-10-06 | |||
| JPH11298077A | 1999-10-29 | |||
| US20110006188A1 | 2011-01-13 | |||
| JPH07147446A | 1995-06-06 |
Other References:
See also references of EP 3674743A4
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
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