发明名称 |
Output-compensating device and method of an image sensor |
摘要 |
An output compensating device of an image sensor using a number of light-sensor circuits, each of which represents a unit pixel and works by producing in a photoelectric converting element a sensor current proportional to a quantity of light falling thereon, converting the current into a voltage signal by using sub-threshold region characteristic of a transistor having a logarithmic output characteristic in a weak inverse state, which enables the image sensor to compensate for variations in each pixel output by using a sensor signal obtainable when changing a gate voltage and drain voltage of the transistor with shut-off light falling on the photoelectric converting element to a value lower than normal voltages of the transistor for taking video. This enables the image sensor to easily compensate for variations in output characteristics of respective light sensor circuits in a pseudo output state created therein with no actual light falling thereon.
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申请公布号 |
US7932947(B2) |
申请公布日期 |
2011.04.26 |
申请号 |
US20030693204 |
申请日期 |
2003.10.24 |
申请人 |
HONDA GIKEN KOGYO KABUSHIKI KAISHA |
发明人 |
SHINOTSUKA SUKEYUKI;NAKAJIMA ATSUSHI;WANATABE HIRONARI |
分类号 |
H04N5/335;H04N3/14;H04N5/365;H04N5/369;H04N5/374;H04N5/378 |
主分类号 |
H04N5/335 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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