| 摘要 |
<p>A semiconductor pickup device includes a pixel circuit (1) including: a photodiode (10) passing to a prescribed node (N10) a current of a value corresponding to intensity of light received; a log transistor (11) operating in a log region when the prescribed node (N10) is increased in potential (VP); and a reset transistor (12) operative for the prescribed node's potential (VP) higher than a threshold potential (VP0) to reset in response to a reset signal (RST) the prescribed node's potential (VP) to a reset potential (VRL), and operative for the prescribed node's potential (VP) lower than the threshold potential (VP0) to avoid the resetting. For low illuminance the pixel circuit (1) decreases in frame rate and lower minimum illuminance required for pickup can be provided.</p> |
