Title:
LIGHT RECEIVING DEVICE, HISTOGRAM GENERATION METHOD, AND RANGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/166349
Kind Code:
A1
Abstract:
The present technology relates to a light receiving device, a histogram generation method, and a ranging system which enable a histogram generation circuit to be implemented with a small area and low power consumption. This light receiving device is provided with: a measurement unit which measures time information from a light emission timing of a light source to a light receiving timing at which a light receiving element receives the light; and a histogram generation circuit which generates a histogram which can accumulate, on the basis of the time information, N bits as a frequency value. The histogram generation circuit is provided with: a low-order bit generation unit which operates at a first speed and generates low-order bits among the N bits; and a high-order bit generation unit which operates at a second speed, which is slower than the first speed, and generates high-order bits among the N bits. The present technology can be applied to, for example, a ranging system which detects the distance to a subject in a depth direction.
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Inventors:
SUZUKI NOBUHARU (JP)
Application Number:
PCT/JP2020/003342
Publication Date:
August 20, 2020
Filing Date:
January 30, 2020
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
G01C3/06; G01S7/481; G01S17/10; H03K23/00
Foreign References:
| JP2010091377A | 2010-04-22 | |||
| JP2017147692A | 2017-08-24 | |||
| JP2008160353A | 2008-07-10 | |||
| JP2014107793A | 2014-06-09 |
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
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