Title:
LIGHT DETECTION DEVICE AND LIGHT DETECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/172622
Kind Code:
A1
Abstract:
This light detection device comprises: a clock signal generation unit that comprises a reference oscillation circuit for carrying out an oscillation operation and that generates a clock signal having a prescribed frequency by carrying out a phase synchronization operation; a first timing detection unit that comprises a first light reception unit for generating a first pulse signal corresponding to a light reception result of a first light reception element, a first counter for generating a first code by carrying out a count operation on the basis of the clock signal, a first oscillation circuit for generating a first multiphase clock signal by carrying out an oscillation operation on the basis of the first pulse signal, and a first latch unit for, on the basis of the first pulse signal, latching the first code and a second code corresponding to the first multiphase clock signal, and that detects a first light reception timing at the first light reception unit; and a correction processing unit that carries out first correction processing according to the frequency difference between the frequency of the clock signal and the frequency of the first multiphase clock signal.
Inventors:
SAKAZUME SHUNSUKE (JP)
Application Number:
PCT/JP2021/047983
Publication Date:
August 18, 2022
Filing Date:
December 23, 2021
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
G01S7/497; G01C3/06; G01S7/4865; G01S17/14; G04F10/04; H03M1/10
Foreign References:
| JP2017173153A | 2017-09-28 | |||
| JP2002267752A | 2002-09-18 | |||
| JP2002214369A | 2002-07-31 | |||
| JP2020148562A | 2020-09-17 | |||
| US20110169673A1 | 2011-07-14 |
Attorney, Agent or Firm:
TSUBASA PATENT PROFESSIONAL CORPORATION (JP)
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