Ultra-high dynamic range CMOS sensor
US10484618B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2018 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | Oct 24, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging array having a plurality of pixel sensors connected to a bit line is disclosed. Each pixel sensor includes a capacitive overflow pixel sensor characterized by an overflow capacitor having a switching terminal, and a floating diffusion node, a buffer amplifier that connects the floating diffusion node to a bit line in response to row select signal, and a switch that connects the switching terminal to either ground or a boost voltage. The imaging array also includes a switch controller that controls the switch and is connected to the bit line, the switch controller determining a voltage on the bit line, the switch controller connecting the switching terminal to the boost voltage during an exposure of the pixel sensor to light and to either ground or the boost voltage during a readout of charge stored on the overflow capacitor depending on the voltage on the bit line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.