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Title:
ACTIVE PIXEL CIRCUIT CAPABLE OF BEING READ RANDOMLY AND DRIVING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/128595
Kind Code:
A1
Abstract:
Disclosed are an active pixel circuit capable of being read randomly and a driving method therefor. The active pixel circuit comprises: a photodiode, a first transistor, a second transistor, a first power supply, and a second power supply; the first power supply is connected to a drain of the second transistor, and is connected to a drain of the first transistor by means of the diode; the drain of the first transistor is connected to a gate of the first transistor and a top gate of the second transistor; a source of the first transistor is grounded; a bottom gate of the second transistor is connected to the second power supply; and a source of the second transistor is a signal output terminal. The present invention enables output current of an active pixel sensor circuit capable of being read randomly and photocurrent of the diode to be in a power function relationship, thereby achieving a linear relationship between an output signal of the circuit and the light intensity. Therefore, the sensitivity and dynamic response range of the sensor may be optimized at the same time.

Inventors:
WANG KAI (CN)
XU YITONG (CN)
QI YIHONG (CN)
SHI RUI (CN)
Application Number:
PCT/CN2020/078925
Publication Date:
July 01, 2021
Filing Date:
March 12, 2020
Export Citation:
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Assignee:
UNIV SUN YAT SEN (CN)
International Classes:
H04N5/335
Foreign References:
CN101556962A2009-10-14
CN110460786A2019-11-15
CN101742131A2010-06-16
CN101210845A2008-07-02
US20080018766A12008-01-24
Attorney, Agent or Firm:
GUANGZHOU SINO PATENT & TRADEMARK AGENT CO., LTD. (CN)
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