Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2007-02-06
2007-02-06
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C348S308000
Reexamination Certificate
active
10451522
ABSTRACT:
The invention relates to an image sensor device comprising a substrate, formed in CMOS technology, in particular, with an integrated semiconductor structure (ASIC) and, arranged above that, an optically active thin-film structure comprising in each case at least one layer made of doped and undoped amorphous silicon, spatially adjacent pixels in each case being formed in the horizontal plane, which pixels each have an optoelectronic transducer for converting incident light into an electric current proportional to the incident quantity of light, and also a charge store assigned to the optoelectronic transducer, the charge state of which charge store can be varied in a manner dependent on the light incident on the assigned optoelectronic transducer. Taking this as a departure point, the invention is based on the object of further developing an image sensor device of the stated type to the effect of avoiding image distortions in the case of moving objects, which is achieved according to the invention by virtue of the fact that the charge store is a capacitor (Cint), in which the photocurrent output by the optoelectronic transducer can be integrated during a predetermined measurement duration, and that a switching means (Tstop) that can be driven by a common control device is provided in each pixel, which switching means can be driven jointly for all the pixels of the image sensor device.
REFERENCES:
patent: 6002123 (1999-12-01), Suzuki
patent: 6204524 (2001-03-01), Rhodes
patent: 6307195 (2001-10-01), Guidash
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patent: 0863663 (1998-09-01), None
International Search Report from co-pending PCT application No. WO 02/51129 (PCT/EP01/14999), filed Dec. 18, 2001.
Jorgenson Lisa K.
Morris James H.
Pyo Kevin
STMicroelectronics NV.
Wolf Greenfield & Sacks P.C.
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