Optical sensor with photo TFT
US7940252B2 · kind B2 · utility
10Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2007 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Feb 5, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13312
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical sensor is disclosed. Each sensor pixel circuit of the optical sensor includes a first readout TFT for reading out voltage of a charge node, a second readout TFT for controllably resetting the charge node to a first reset voltage, and a photo TFT for discharging the voltage at the charge node to a second reset voltage in absence of an object(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.