Title:
PIXEL UNIT AND IMAGE SENSOR
Document Type and Number:
WIPO Patent Application WO/2020/061883
Kind Code:
A1
Abstract:
Provided are a pixel unit and an image sensor. The pixel unit comprises a photoelectric conversion device; a pass transistor; a reset transistor; a first source follower and a second source follower, wherein gate electrodes of the first source follower and the second source follower are both electrically connected to a floating diffusion region between the pass transistor and the reset transistor, and source electrodes of the first source follower and the second source follower are both connected to a row selection line by means of a selector transistor; and a switch device connected to the second source follower, wherein when the switch device is turned on, the second source follower and the first source follower work simultaneously, and when the switch device is turned off, the first source follower works and the second source follower does not work. In the present application, according to actual requirements, a trade-off can be made between the size of a source follower of a pixel unit and a charge/voltage gain of a floating diffusion region so as to effectively control the signal-to-noise ratio of an image signal output by the pixel unit.
Inventors:
XU ZE (CN)
Application Number:
PCT/CN2018/107863
Publication Date:
April 02, 2020
Filing Date:
September 27, 2018
Export Citation:
Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
H04N5/3745; H04N5/374; H04N5/378
Foreign References:
| CN103369269A | 2013-10-23 | |||
| CN107946325A | 2018-04-20 | |||
| CN102695008A | 2012-09-26 | |||
| CN103369271A | 2013-10-23 | |||
| US20130256510A1 | 2013-10-03 |
Attorney, Agent or Firm:
LONGSUN LEAD IP LTD. (CN)
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