Depth pixel of three-dimensional image sensor and three-dimensional image sensor including the same
US9232163B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2013 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Jul 18, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/894
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A depth pixel includes a photo detection unit, an ambient light removal current source, a driving transistor and a select transistor. The photo detection unit is configured to generate a light current based on a received light reflected from a subject, the received light including an ambient light component. The ambient light removal current source configured to generate a compensation current indicating the ambient light component in response to a power supply and at least one compensation control signal. The driving transistor is configured to amplify an effective voltage corresponding to the light current and the compensation current. The select transistor configured to output the amplified effective voltage in response to a selection signal, the amplified effective voltage indicating a depth of the subject.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.