Image pickup device, display-and-image-pickup device, electronic apparatus and method of detecting an object
US9405406B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2015 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | May 6, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/142
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image pickup device capable of stably detecting an object irrespective of use conditions while reducing manufacturing costs is provided. When illumination light from a backlight is emitted to a proximity object from an I/O display panel, an electric charge is accumulated in image pickup pixels in accordance with total light amount, including reflected light originating from the backlight and external environment light. Moreover, when the illumination light is not emitted, a discharging electric charge is released from the image pickup pixels in accordance with the amount of environment light. Thereby, an environment light component is subtracted from an image pickup signal obtained from each of the image pickup pixels, so object information about the proximity object is obtained without influence of the environment light. Moreover, in a light reception drive circuit, fewer frame memories for producing a picked-up image from the image pickup signal are necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.