Field emission device and method of operation
First Claim
1. A field emission device comprising:
- an electron emitter;
an anode plate and a cathode plate, wherein the cathode plate is spaced apart from the anode plate to define an interspace region therebetween;
the anode plate further including a glass plate defining a proximate surface and a distal surface, wherein a distance between the electron emitter and the distal surface is greater than a distance between the electron emitter and the proximate surface; and
a charge control electrode disposed on the distal surface of the glass plate of the anode plate.
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Accused Products
Abstract
A field emission device (200) includes a cathode plate (110) having a back plate (112) made from glass and an anode plate (120) having a transparent substrate (122) also made from glass. A first charge control electrode (152) is affixed to a distal surface (148) of back plate (112), and a second charge control electrode (158) is affixed t0 the periphery of transparent substrate (122). A ballast resistor (114) is disposed on a proximate surface (155) of back plate (112). A method for operating told omission device (200) includes the stop of controlling a potential applied to first charge control electrode (152) in a manner sufficient to control the conductivity of ballast resistor (114) and provide an electron current (138) that is constant. The method further includes the step of controlling a potential applied to second charge control electrode (158) in a manner sufficient to prevent arcing due to wild up or charge within transparent substrate (122).
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Citations
31 Claims
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1. A field emission device comprising:
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an electron emitter;
an anode plate and a cathode plate, wherein the cathode plate is spaced apart from the anode plate to define an interspace region therebetween;
the anode plate further including a glass plate defining a proximate surface and a distal surface, wherein a distance between the electron emitter and the distal surface is greater than a distance between the electron emitter and the proximate surface; and
a charge control electrode disposed on the distal surface of the glass plate of the anode plate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A field emission device comprising:
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a controllable layer defining a portion of an anode plate, the controllable layer having a plurality of mobile charges within; and
means operably coupled to the controllable layer for controlling a distribution within the controllable layer of the plurality of mobile charges. - View Dependent Claims (9, 10)
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11. A field emission device comprising:
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an electron emitter, an anode plate and a cathode plate, wherein the cathode plate has positioned thereon a proximate surface the electron emitter, the cathode plate being spaced apart from the anode plate to define an interspace region therebetween;
the anode plate including a glass plate defining a proximate surface and a distal surface, wherein the proximate surface is proximately disposed with respect to the electron emitter, and wherein the distal surface is distally disposed with respect to the electron emitter; and
a charge control electrode disposed on the distal surface of the glass plate of the anode plate.
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- 12. A method for operating a field emission device wherein the anode plate includes a controllable layer having a plurality of mobile charges, the method comprising the step of controlling a distribution within the controllable layer of the plurality of mobile charges.
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18. A method for operating a field emission device having an electron emitter, a controllable layer disposed within an anode plate and defining a proximate surface and a distal surface, and a charge control electrode disposed on the distal surface of the controllable layer, the method comprising the steps of:
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causing the electron emitter to emit an electron current; and
applying a potential to the charge control electrode in a manner sufficient to control a plurality of mobile charges in the controllable layer disposed within the anode plate.
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- 19. A method for operating a field emission device having an anode plate including a glass layer having a plurality of mobile charges within, the method comprising the step of controlling a distribution within the glass layer of the plurality of mobile charges.
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25. A method for operating a field emission device having an electron emitter, an anode plate including a glass layer defining a proximate surface and a distal surface, a cathode plate including a glass layer defining a proximate surface and a distal surface, a semiconductive layer disposed on the proximate surface of the glass layer of the cathode plate and operably coupled to the electron emitter for supplying electrons thereto, a charge control electrode disposed on the distal surface of the glass layer of the anode plate, and a charge control electrode disposed on the distal surface of the glass layer of the cathode plate, the method comprising the steps of:
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causing the electron emitter to emit an electron current; and
applying a potential to the charge control electrode of the anode plate and the charge control electrode of the cathode plate in a manner sufficient to control the electron current. - View Dependent Claims (26)
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27. A method for operating a field emission device having an anode plate and a cathode plate, the method comprising the steps of:
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providing between the anode plate and the cathode plate a separation distance equal to less than 5 millimeters;
applying to the anode plate a potential greater than 600 volts;
affixing a charge control electrode to the anode plate, thereby defining a charge-controlled plate;
applying a potential to the charge control electrode; and
controlling the potential applied to the charge control electrode in a manner sufficient to control a distribution of a plurality of mobile charges within the charge-controlled plate. - View Dependent Claims (28, 29, 30, 31)
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Specification