Electro-optical device including a field emission array and photoconductive layer
AssigneeMotorola, Inc.
InventorsScott V. Johnson, James E. Jaskie
Life of this patent
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Abstract
An electro-optical device including a cathode plate, a plurality of emitters and an anode plate. The anode plate including a photoconductive layer formed on an interior surface and in alignment to receive emitter emissions. The device is characterized as matrix addressed according to an input signal. A varying video signal, in concert with the matrix scanning of the cathode, generates a video signal containing a scene imaged by the photoconductive layer of the anode plate.
Claims31
A field emission electro-optical device comprising:
- a supporting substrate;
- a conductive layer positioned on the supporting substrate;
- an emitter positioned on the layer of conductive material;
- a gate metal layer electrically separated from the conductive layer and surrounding the emitter, the gate metal layer separated from the emitter by a substantially fixed distance and defining a gate opening through the metal gate metal layer overlying the emitter;
- an anode plate positioned in spaced relationship to the gate metal layer;
- and
- a photoconductive film deposited on an interior major surface of the anode plate and separated from the emitter by a substantially fixed distance, the photoconductive film designed to receive electrons emitted by the emitter.
A field emission electro-optical device comprising:
- a supporting substrate;
- a conductive layer formed as a plurality of conductive strips positioned on the supporting substrate in parallel spaced apart relationship;
- a dielectric layer positioned on an uppermost surface of the conductive layer and having at least one well formed therein;
- an emitter positioned on the layer of conductive material and within the at least one well and on the plurality of conductive strips;
- a gate metal layer electrically separated from the conductive layer and surrounding the emitters, the gate metal layer separated from the emitters by a substantially fixed distance and defining a gate opening through the metal gate metal layer overlying the emitters;
- an anode plate positioned in spaced relationship to the gate metal layer;
- and
- a photoconductive film deposited on an interior major surface of the anode plate and separated from the emitters by a substantially fixed distance, the photoconductive film designed to receive electrons emitted by the emitters.
A field emission electro-optical device comprising:
- a supporting substrate formed of a non-conductive material;
- a conductive layer formed as a plurality of conductive strips positioned on the supporting substrate in parallel spaced apart relationship;
- a plurality of emitters positioned on the plurality of conductive strips;
- a gate metal layer electrically separated from the conductive layer and surrounding the emitters, the gate metal layer separated from the emitters by a substantially fixed distance and defining a gate opening through the metal gate layer overlying the emitters;
- a dielectric material separating the conductive layer and the gate metal layer;
- an anode plate positioned in spaced relationship to the gate metal layer;
- and
- a photoconductive film formed of one of cadmium telluride or zinc selenide deposited on an interior major surface of the anode plate and separated from the emitters by a substantially fixed distance, the photoconductive film designed to receive electrons emitted by the emitters.
Dependencies are inferred from the claim text.