Title:
DISTANCE MEASUREMENT DEVICE AND COUNTER
Document Type and Number:
WIPO Patent Application WO/2023/218798
Kind Code:
A1
Abstract:
[Problem] To control a Gray code applied to a range. [Solution] This distance measurement device comprises one or a plurality of light-emitting elements, a plurality of light-receiving elements, a first counter, an encoder, a decoder, a second counter, and a distance extraction circuit. The plurality of light-receiving elements receive light from the light-emitting element, the light having reflected off of a target. The first counter performs, in a prescribed time interval, a state transition of a first binary code, which is an n-bit binary code from a first value to a second value and in which the next value after the second value is set as the first value, the second value being 2n-1-(first value). The encoder converts the first binary code into an n-bit Gray code. The decoder acquires an n-bit second binary code from the Gray code based on the light reception timing of the light-receiving elements. The second counter counts the number of times light is received in the plurality of light-receiving elements corresponding to the second binary code. The distance extraction circuit measures the distance to the target on the basis of the counted value acquired by the second counter.
Inventors:
KAKIOKA HIDENOBU (JP)
Application Number:
PCT/JP2023/013871
Publication Date:
November 16, 2023
Filing Date:
April 03, 2023
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
G01S7/4865; H03M7/16
Foreign References:
| US20210302917A1 | 2021-09-30 | |||
| JP2006074758A | 2006-03-16 | |||
| JP2020504299A | 2020-02-06 |
Attorney, Agent or Firm:
MIYAJIMA Manabu (JP)
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