Focus detection apparatus, focus detection method, and image capturing apparatus
US9167151B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2014 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/704
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A focus detection apparatus comprises: a sensor unit provided with a plurality of sensor pairs, including a first and second sensor pairs, each of which receives a light beam from an object, accumulates charge, and outputs a pair of image signals for focus detection; a control unit configured to detect a level of a predetermined signal based on the accumulated charge in each sensor pair, and controls charge accumulation time in accordance with the level of the predetermined signal; and a setting unit configured to set a priority of each sensor pair in accordance with the object. The priority of the first sensor pair is set higher than that of the second sensor pair, and the control unit detects the level of the predetermined signal of the first sensor pair in prior to that of the second sensor pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.