Proximity sensor with a sliced integration time sensing mechanism and sensing method thereof
US11039521B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2020 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Mar 30, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proximity sensor with a sliced integration time sensing mechanism and a sensing method thereof are provided. A light transmitter emits a sensing light toward a detected object during a first phase time. A light receiver receives a first light signal formed by the sensing light reflected by the detected object and an ambient light during the first phase time, and receives a second light signal of the ambient light during a second phase time. A first brightness of the first light signal is integrated over the first phase time to form a first integrated brightness value. A second brightness of the second light signal is integrated over the second phase time to form a second integrated brightness value. The light receiver subtracts the second integrated brightness value from the first integrated brightness value to obtain a first integrated brightness correction value by phase cancellation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.