发明名称 |
TIME INTEGRATING PIXEL SENSOR |
摘要 |
A time-integrating pixel sensor (100) having a photo-detector (102), a capacitor (104), a comparator (110) and a pixel data buffer (114). In operation, the photo-current from the photo-detector charges the capacitor and produces a photo-voltage. The photo-voltage sensed by the capacitor and a reference voltage (108) is compared with the comparator. If the photo-voltage exceeds the reference voltage, a global code value is latched into the pixel data buffer. The optical power falling on the photo-detector is determined from the latched code value. An array of sensors is incorporated into a semiconductor device together with circuitry (116) to read and decode the pixel data buffers. The reference voltage may be varied in time to increase the dynamic range of the sensor.
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申请公布号 |
WO03051036(A1) |
申请公布日期 |
2003.06.19 |
申请号 |
WO2002US37567 |
申请日期 |
2002.11.22 |
申请人 |
MOTOROLA, INC., A CORPORATION OF THE STATE OF DELAWARE |
发明人 |
HARTON, AUSTIN;CASTRO, FRANCISCO;HEROLD, BARRY |
分类号 |
H04N5/374;(IPC1-7):H04N3/14;H04N5/335 |
主分类号 |
H04N5/374 |
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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