Electron emitter
First Claim
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1. An electron emitter comprising:
- a substance serving as an emitter made of a dielectric material, and a first electrode and a second electrode to which a drive voltage is applied to emit electrons;
said first electrode being formed on a first surface of the substance serving as the emitter;
said second electrode being formed on a second surface of the substance serving as the emitter;
at least said first electrode having a plurality of through regions through which said substance serving as the emitter is exposed, said first electrode having a surface which faces said substance serving as the emitter in peripheral portions of said through regions and which is spaced from said substance serving as the emitter.
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Abstract
An electron emitter has an emitter made of a dielectric material, and an upper electrode and a lower electrode to which a drive voltage is applied to emit electrons. The upper electrode is formed on a first surface of the substance serving as the emitter, and the lower electrode is formed on a second surface of the substance serving as the emitter. The upper electrode has a plurality of through regions through which the emitter is exposed. The upper electrode has a surface which faces the emitter in peripheral portions of the through regions and which is spaced from the emitter.
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Citations
21 Claims
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1. An electron emitter comprising:
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a substance serving as an emitter made of a dielectric material, and a first electrode and a second electrode to which a drive voltage is applied to emit electrons;
said first electrode being formed on a first surface of the substance serving as the emitter;
said second electrode being formed on a second surface of the substance serving as the emitter;
at least said first electrode having a plurality of through regions through which said substance serving as the emitter is exposed, said first electrode having a surface which faces said substance serving as the emitter in peripheral portions of said through regions and which is spaced from said substance serving as the emitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electron emitter comprising:
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a substance serving as an emitter made of a dielectric material;
a first electrode formed in contact with a first surface of the substance serving as the emitter;
a second electrode formed in contact with a second surface of the substance serving as the emitter; and
at least said first electrode having a plurality of through regions through which said substance serving as the emitter is exposed;
wherein said electron emitter has, in its electrical operation, between said first electrode and said second electrode;
a capacitor due to said substance serving as the emitter; and
a cluster of capacitors formed by said first electrode and said substance serving as the emitter in said through regions of said first electrode.
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14. An electron emitter having an electron emission region, wherein the electron emitter changes to a first state in which an amount of positive charges and an amount of negative charges due to the accumulation of electrons caused by applying a negative voltage are in equilibrium with each other,
said electron emitter changes from said first state to a second state in which an amount of negative charges is greater than an amount of positive charges due to the accumulation of further electrons, said electron emitter changes from said second state to a third state in which an amount of positive charges and an amount of negative charges due to the emission of electrons caused by applying a positive voltage are in equilibrium with each other, said electron emitter changes from said third state to a state in which an amount of positive charges is greater than an amount of negative charges due to the emission of further electrons, and said electron emission has characteristics represented by: -
|V1|<
|v2|where V1 represents the voltage applied to the electron emitter to change to said first state and V2 represents the voltage applied to the electron emitter to change to said third state. - View Dependent Claims (15, 16, 17)
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18. An electron emitter comprising:
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a substance serving as an emitter made of a dielectric material, and a first electrode and a second electrode to which a drive voltage is applied to emit electrons;
wherein a first coercive voltage V1 is applied in one direction between said first electrode and said second electrode changes the electron emitter from a state in which said substance serving as the emitter is polarized in one direction to a state in which the polarization is inverted, and a second coercive voltage V2 is applied in another direction to change the polarization back in said one direction from said last-mentioned state, and the voltages are related to each other by;
v1<
0 or v2<
0, and
|v1|<
||v2|. - View Dependent Claims (19, 20, 21)
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Specification