发明名称 |
Photoelectric conversion device including photoelectric conversion element and amplifier circuit having a thin film transistor |
摘要 |
Objects are to accumulate electric charge in a capacitor so that light intensity can be detected even when the amount of incident light is small, and to operate a photoelectric conversion device without increasing the number of elements such as a constant current source or a switch. The photoelectric conversion device includes a photoelectric conversion circuit, a capacitor, and a comparator for comparing a potential of one electrode of the capacitor with a second potential. The photoelectric conversion circuit includes a photoelectric conversion element and an amplifier circuit for amplifying an output current from the photoelectric conversion element In the capacitor, a first potential is supplied through a first switch, and charging or discharging is performed through a second switch in accordance with the current amplified by the amplifier circuit. |
申请公布号 |
US8124922(B2) |
申请公布日期 |
2012.02.28 |
申请号 |
US20090467001 |
申请日期 |
2009.05.15 |
申请人 |
KOYAMA JUN;TANADA YOSHIFUMI;SHISHIDO HIDEAKI;AMANO SEIKO;YANAGISAWA MAKOTO;SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
KOYAMA JUN;TANADA YOSHIFUMI;SHISHIDO HIDEAKI;AMANO SEIKO;YANAGISAWA MAKOTO |
分类号 |
H01J40/14 |
主分类号 |
H01J40/14 |
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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