Title:
IMAGE SENSOR
Document Type and Number:
WIPO Patent Application WO/2022/196118
Kind Code:
A1
Abstract:
Provided is an image sensor which operates at high speed with high accuracy and with power consumption. An image sensor 1 comprises: a pixel unit 11 in which a plurality of pixels 11a comprising a sensor element for detecting a physical quantity existing in nature and converting the physical quantity into an electric signal are two-dimensionally disposed in a row direction and a column direction; a digital-analog conversion unit comprising a current-type digital-analog converter 18 to generate a ramp wave; an analog-digital conversion unit 15 comprising a plurality of integrating-type analog-digital converters 15a to convert signals from the pixels 11a into digital signals by comparing with the ramp wave; and a digital control unit 10 for digitally controlling a current value to be flown through a resistor in the current-type digital-analog converter 18. The digital control unit 10 inputs a digital value to the digital-analog converter 18, the digital value incorporating a value varying in proportion to time and a stepped offset value for compensating for a delay in an output signal from the digital-analog converter 18.
Inventors:
MATSUZAWA AKIRA (JP)
YU LILAN (JP)
YU LILAN (JP)
Application Number:
PCT/JP2022/002858
Publication Date:
September 22, 2022
Filing Date:
January 26, 2022
Export Citation:
Assignee:
TECH IDEA CO LTD (JP)
International Classes:
H04N5/378; H03M1/10; H03M1/56; H03M1/74
Domestic Patent References:
| WO2011021320A1 | 2011-02-24 | |||
| WO2013179615A1 | 2013-12-05 |
Foreign References:
| JP2007059991A | 2007-03-08 |
Attorney, Agent or Firm:
OMORI Keiko (JP)
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