Title:
IMAGE PICKUP DEVICE AND ENDOSCOPE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/022119
Kind Code:
A1
Abstract:
This image pickup device has a plurality of pixels, a reference current generation circuit, a differential current generation circuit, a reference voltage generation circuit, a conversion circuit, and an output circuit. The differential current generation circuit generates a differential current corresponding to a difference between a pixel current and a reference current. The conversion circuit converts the differential current into an output voltage on the basis of a first reference voltage. In the cases where the output voltage at the time when the pixels are reset is larger than the output voltage at the time when the pixels are exposed, a second reference voltage is larger than the first reference voltage. In the cases where the output voltage at the time when the pixels are reset is smaller than the output voltage at the time when the pixels are exposed, the second reference voltage is smaller than the first reference voltage.
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Inventors:
HAGIHARA YOSHIO (JP)
Application Number:
PCT/JP2015/072346
Publication Date:
February 09, 2017
Filing Date:
August 06, 2015
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
H04N5/355; A61B1/04; H04N5/374; H04N5/378
Domestic Patent References:
| WO2014175005A1 | 2014-10-30 |
Foreign References:
| JP2003198944A | 2003-07-11 | |||
| JP2003348464A | 2003-12-05 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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