Focus detecting apparatus and driving method therefor
US8538251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2012 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Aug 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/672
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A focus detecting apparatus, comprising a first pair of sensor blocks each including a sensor unit and a detection unit, and a power supply unit configured to supply power to the detection unit, wherein when one of the first pair of sensor blocks operates in a first mode, the other operates in a second mode, the detection unit of the sensor block operating in the first mode detects an output of the sensor unit, the sensor unit of the sensor block operating in the second mode accumulates charges and terminates the charge accumulation operation in response to the detection operation, and the power supply unit shuts off power supply to the detection unit of the sensor block operating in the second mode for at least part of the period of time during the operation in the second mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.