Solid-state image-pickup device, method for driving solid-state image-pickup device, and image-pickup apparatus
US8687097B2 · kind B2 · utility
5Cited by
4References
17Claims
0Family size
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Key dates
| Filing date | Dec 14, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Apr 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A CMOS image sensor in which column-parallel ADCs are mounted. Reference voltages Vref1 to Vref4 having slopes with different gradients and a reference voltage Vref5 are used. Additionally, a comparison circuit that compares an output voltage Vx of a unit pixel with any one of the reference voltages Vref1 to Vref4, and a comparison circuit that compares the one of the reference voltages Vref1 to Vref4 with the reference voltage Vref5 are included in a column processing circuit. High-resolution AD conversion is performed at a high speed by respective operations of the comparison circuits and an up/down counter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.