Flat panel detector and image sensor

Details Flat panel detector and image sensor Flat panel detector and image sensor

1995-02-21

1996-10-22

Allen, Stephone

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250207, 313531, H01J 4014

Patent

active

055679293

ABSTRACT:
A flat panel image sensor is provided by combining the photoconductive imaging electrode of a vidicon with a two dimensional array of cold cathode field emitters commonly used for flat panel Field Emission Display (FED) systems. The FED operates normally to emit electrons which are accelerated in prior art displays towards a luminescent phosphor to generate light output proportional to the cathode emission. Rather than accelerating towards a phosphor, electrons, in accordance with the principles of this invention, are accelerated towards a photoconductor layer to replace charge removed from the layer by an incident radiation pattern directed at the photoconductor layer through a layer of transparant, electrically-conducting material which serves as a radiation window. A large area, low cost, small, flat panel sensor is realized. The transparant, electrically-conducting layer may be partitioned to reduce stray capacitance for large area sensors and the partitioned, electrically-conducting layer permits a parallel readout mode of operation.

REFERENCES:
patent: 5369268 (1994-11-01), Van Aller et al.

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