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Registered IMAGE SENSOR AND METHOD OF DRIVING TRANSFER TRANSISTOR OF IMAGE SENSOR
- Inventors
- Bongki Mheen, Young Joo Song, Kim Mi Jin
- Application No.
- 11635174 (2006.12.07)
- Publication No.
- 20070145239 (2007.06.28)
- Registration No.
- 7671315 (2010.03.02)
- Country
- UNITED STATES
- Project Code
- 05ZB1200, SiGe-based Quantum Channel Nano-Device Technology, Young Joo Song
- Abstract
- Provided is a 4-transistor CMOS image in which a driving condition or a pixel structure is changed so that a transfer transistor in a pixel operates in a pinch-off condition during reset and transfer operations in order to reduce dark current and fixed-pattern noise caused by a change in an operation condition of the transfer transistor and inter-pixel characteristic discrepancy. The image sensor includes a photosensitive pixel including a transfer transistor for transferring photon-induced charges created in a photodiode; and a voltage control unit for controlling a turn-on voltage applied to a gate of the transfer transistor to be lower than a floating diffusion node voltage plus the threshold voltage of the transfer transistor during a partial or entire section of a turn-on section of the transfer transistor such that the transfer transistor operates in a pseudo pinch-off mode.
- KSP Keywords
- Control Unit, Dark Current, Driving conditions, Induced charges, Inter-pixel, Operation conditions, Pattern noise, Pinch-off, Pixel structure, Turn-on, Turn-on voltage, Voltage control, fixed pattern noise, image sensor, threshold voltage(Vth)
- Family
| Status | Patent | Country | KIPRIS |
|---|---|---|---|
| Registered | 이미지 센서 및 이미지 센서의 트랜스퍼 트랜지스터 구동 방법 | KOREA | KIPRIS |
| Registered | IMAGE SENSOR AND METHOD OF DRIVING TRANSFER TRANSISTOR OF IMAGE SENSOR | UNITED STATES | |
| Registered | IMAGE SENSOR AND METHOD OF DRIVING TRANSFER TRANSISTOR OF IMAGE SENSOR | UNITED STATES |