Sony Corporation

Sony Semiconductor Solutions Corporation

Masatoshi Kitada

Katsuhisa Daio

Michiya Sako

Hayato Kamizuru

Takeshi Yuwaki

Akihito Kamiegawa

Shouichi Kuroki

Naoki Masumitsu

The present invention relates to a driving device, a driving method, and a light-emitting unit that make it possible to appropriately drive a light-emitting element. The driving device according to the present invention includes: a setting section () that sets at least one of a bias current of a light-emitting element (an LD) or a target current for setting output light from the light-emitting element (the LD) to desired intensity on the basis of a result of detection of an offset light amount when the light-emitting element (the LD) does not emit light; and an output controller () that controls an output of a driving current of the light-emitting element (the LD) on the basis of at least one of the set bias current or the set target current. The detection of the offset light amount is performed by a light-receiving element (a PD) that receives a portion of the output light. The present invention is applicable to a ranging module, for example.

Driving device, driving method, and light-emitting unit

The present technology relates to a measurement circuit, a driving method, and an electronic instrument capable of reducing power consumption. In the measurement circuit, irradiation light is emitted from the light emitting unit toward the object, and light from the object is received to measure pulse waves or the like. The measurement circuit includes: a light receiving unit that receives light from an object; an integrating unit that performs integration of a current generated in accordance with the reception of the light by the light receiving unit and generates a voltage according to the amount of reception of the light; and a pulse generating unit that generates a pulse signal having a pulse width corresponding to the amount of reception of the light on the basis of the voltage. The present technology can be applied to electronic instruments such as wearable devices, for example.

Measurement circuit, driving method, and electronic instrument

Growing community of inventors

Kagoshima, Japan

Masatoshi Kitada