Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1993-12-23
1995-04-25
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
348308, H01J 4014
Patent
active
054101468
ABSTRACT:
A contact image sensor having an arrangement capable of reducing the number of data lines passing adjacent photoelectric converters, thereby achieving a high resonance and an easy design. The contact image sensor includes a photoelectric conversion unit including m aligned blocks each having n aligned photoelectric converters, a switching unit including m aligned blocks each having n aligned thin film transistors classified into n/2.sup.k groups each having 2.sup.k thin film transistors and connected to respective photoelectric converters of each corresponding block of photoelectric conversion unit, 2.sup.k m gate lines classified into groups each having 2.sup.k gate lines respectively connected in common to gate electrodes of the same numbered thin film transistors of the thin film transistor groups of each corresponding block of the switching unit, n/2.sup.k data lines respectively connected in common to drain electrodes of the thin film transistors of predetermined groups of the blocks of the switching unit to construct an alternative type arrangement, and a bias line connected in common to all photoelectric converters of the photoelectric conversion unit 1 and adapted to apply a bias signal for a photoelectric conversion to the photoelectric converters.
REFERENCES:
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patent: 5027226 (1991-06-01), Nagata et al.
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patent: 5291292 (1994-03-01), Hotta
Miyake, H., et al., High-Performance a-Si:H Thin Film Transistor Driven Linear Image Sensor with New Multiplex Structure for G4 Facsimile, Japanese Journal of Applied Physics, vol. 29, No. 12, pp. L2373-L2376 (Dec. 1990).
Goldstar Co. Ltd.
Nelms David C.
Nichols Steven L.
White John P.
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