Flat panel field emission display apparatus
First Claim
1. An article comprising field emission cathodoluminescent display means comprisinga) a multiplicity of cathode electrode means comprisingi) a plurality of micropoint emitter means, andii) impedance means for limiting a current associated with said micropoint emitter means;
- b) a multiplicity of gate electrode means, arranged such that said cathode and gate electrode means form a matrix structure having columns and rows and a multiplicity of intersection regions, with a multiplicity of said micropoint emitter means being located in a given intersection region, said micropoint emitter means facing towards said gate electrode means, with substantially each of said micropoint emitter means in the given intersection region being associated an aperture through said gate electrode means;
c) anode means comprising material capable of cathodoluminescence, said anode means positioned such that electrons that are emitted from the micropoint emitter means in the given intersection region can impinge on the anode means; and
d) means for applying a first voltage V1 between a predetermined cathode electrode means and a predetermined gate electrode means, and means for applying a second voltage V2 between the predetermined cathode electrode means and the anode means;
characterized in thate) said impedance means comprise first impedance means that carry substantially all of the current associated with substantially all the micropoint emitter means in one or more intersection regions including the given intersection region, but including fewer than all of the intersection regions in a column or row.
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Abstract
The disclosed flat panel field emitter display (FPFED) comprises a first impedance that carries all of the current to all of the micropoint emitters of one or more (preferably one, typically fewer than about five, always fewer than all the pixels of a given row or column of the display) pixels. Provision of the first impedance can provide self-compensation to the involved pixel, making it possible to substantially reduce the required number of micropoint emitters/pixel and color. This in turn can lead to increased speed of the display, and/or to lower power consumption. The first impedance advantageously is a capacitor rather than a resistor, and embodiments that comprise a capacitive first impedance are disclosed. Other advantageous optional features are also disclosed. These include provision of gate impedances, of photoconductive elements, of an auxiliary gate electrode, or of gettering means.
164 Citations
23 Claims
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1. An article comprising field emission cathodoluminescent display means comprising
a) a multiplicity of cathode electrode means comprising i) a plurality of micropoint emitter means, and ii) impedance means for limiting a current associated with said micropoint emitter means; -
b) a multiplicity of gate electrode means, arranged such that said cathode and gate electrode means form a matrix structure having columns and rows and a multiplicity of intersection regions, with a multiplicity of said micropoint emitter means being located in a given intersection region, said micropoint emitter means facing towards said gate electrode means, with substantially each of said micropoint emitter means in the given intersection region being associated an aperture through said gate electrode means; c) anode means comprising material capable of cathodoluminescence, said anode means positioned such that electrons that are emitted from the micropoint emitter means in the given intersection region can impinge on the anode means; and d) means for applying a first voltage V1 between a predetermined cathode electrode means and a predetermined gate electrode means, and means for applying a second voltage V2 between the predetermined cathode electrode means and the anode means;
characterized in thate) said impedance means comprise first impedance means that carry substantially all of the current associated with substantially all the micropoint emitter means in one or more intersection regions including the given intersection region, but including fewer than all of the intersection regions in a column or row. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An article comprising field emission cathodoluminescent display means comprising
a) a multiplicity of cathode electrode means comprising i) a plurality of micropoint emitter means, and ii) impedance means for limiting a current associated with said micropoint emitter means; -
b) a multiplicity of gate electrode means, arranged such that said cathode and gate electrode means form a matrix structure having columns and rows and a multiplicity of intersection regions, with a multiplicity of said micropoint emitter means being located in a given intersection region, said micropoint emitter means facing towards said gate electrode means, with substantially each of said micropoint emitter means in the given intersection region being associated an aperture through said gate electrode means; c) anode means comprising material capable of cathodoluminescence, said anode means positioned such that electrons that are emitted from the micropoint emitter means in the given intersection region can impinge on the anode means; and d) means for applying a first voltage V1 between a predetermined cathode electrode means and a predetermined gate electrode means, and means for applying a second V2 voltage between the predetermined cathode electrode means and the anode means;
characterized in thate) said impedance means comprise capacitor means, and wherein at least V1 is an alternating voltage. - View Dependent Claims (22, 23)
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Specification