Flat CRT display
AssigneeSI Diamond Technology, Inc.
InventorsZvi Yaniv, Ronald Charles Robinder
Life of this patent
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Abstract
A plurality of field emission device cathodes each generate emission of electrons, which are then controlled and focused using various electrodes to produce an electron beam. Horizontal and vertical deflection techniques, similar to those used within a cathode ray tube, operate to scan the individual electron beams onto portions of a phosphor screen in order to generate images. The use of the plurality of field emission cathodes provides for a flatter screen depth than possible with a typical cathode ray tube.
Claims52
A field emission device comprising:
- a field emission cathode;
- one or more electrodes operable for producing an electric field to promote an emission of electrons from the cathode;
- electronic optics operable for creating an electron beam from the emitted electrons;
- an electron beam apparatus operable for deflecting the electron beam into a plurality of vectors having diverging angles with respect to each other;
- and
- an anode having an electroluminescent material positioned to receive the deflected electron beam, whereby the anode is operable to emit photons in response to bombardment by the electron beam.
A field emission cathode structure comprising:
- a field emission cathode;
- one or more electrodes operable for producing an electric field to promote an emission of electrons from the cathode;
- electronic optics operable for creating an electron beam from the emitted electrons;
- and
- an electronic beam apparatus operable for focusing and deflecting the electron beam into a plurality of vectors, wherein the electron beam apparatus includes horizontal and vertical deflectors operable for scanning the electron beam through the vectors.
A cathode plate comprising a plurality of cathode structures positioned adjacent each other, wherein each of the plurality of cathode structures comprises:
- a field emission cathode;
- one or more electrodes operable for producing an electric field to promote an emission of electrons from the cathode;
- electronic optics operable for creating an electron beam from the emitted electrons;
- and
- an electron beam apparatus operable for focusing and deflecting the electron beam into a plurality of vectors, wherein the electron beam apparatus includes horizontal and vertical deflectors operable for scanning the electron beam through the vectors.
A display comprising:
- a screen having a phosphor layer, the screen portioned into a plurality of pixels;
- and
- a cathode plate comprising a plurality of cathode structures positioned adjacent each other, wherein each of the plurality of cathode structures comprises;
- a field emission cathode;
- one or more electrodes operable for producing an electric field to promote an emission of electrons from the cathode;
- electronic optics operable for creating an electron beam from the emitted electrons;
- and
- an electron beam apparatus operable for focusing and deflecting the electron beam onto a subplurality of the plurality of pixels.
A field emission device comprising:
- a field emission cathode;
- one or more electrodes operable for producing an electric field to promote an emission of electrons from the cathode;
- electronic optics operable for creating an electron beam from the emitted electrons;
- and
- an electron beam apparatus operable for deflecting the electron beam into a plurality of vectors having diverging angles with respect to each other, wherein the electron beam apparatus is operable for scanning the electron beam through each of the plurality of vectors in a sequential manner.
A display comprising:
- a screen having a phosphor layer, the screen portioned into a plurality of pixels;
- and
- a cathode plate, positioned a predetermined distance from the screen, comprising a plurality of cathode structures positioned adjacent each other, wherein each of the plurality of cathode structures comprises;
- a field emission cathode;
- one or more electrodes for producing an electric field to promote an emission of electrons from the cathode;
- electronic optics for creating an electron beam from the emitted electrons;
- and
- electron beam apparatus for focusing and deflecting the electron beam onto a portion of the plurality of pixels, wherein the electron beam apparatus is operable for deflecting the electron beam onto a subset plurality of the plurality of pixels.
A field emission display comprising:
- a substrate;
- first, second, third and fourth cold cathodes deposited over the substrate, wherein the first, second, third and fourth cold cathodes are positioned relative to each other in an x,y matrix;
- one or more first electrodes for producing a first electric field to transition the first cold cathode from a non-emitting state to an emitting state to produce a first emission of electrons from the first cold cathode;
- one or more second electrodes for producing a second electric field to transition the second cold cathode from a non-emitting state to an emitting state to produce a second emission of electrons from the second cold cathode;
- one or more third electrodes for producing a third electric field to transition the third cold cathode from a non-emitting state to an emitting state to produce a third emission of electrons from the third cold cathode;
- one or more fourth electrodes for producing a fourth electric field to transition the fourth cold cathode from a non-emitting state to an emitting state to produce a fourth emission of electrons from the fourth cold cathode;
- first electronic optics for creating a first electron beam from the first emission of electrons;
- second electronic optics for creating a second electron beam from the second emission of electrons;
- third electronic optics for creating a third electron beam from the third emission of electrons;
- fourth electronic optics for creating a fourth electron beam from the fourth emission of electrons;
- a display screen positioned a distance from the substrate, wherein the display screen further comprises first, second, third and fourth partitions, each partition having a plurality of pixels;
- one or more first scanning electrodes for scanning the first electron beam from the first cold cathode to each of the plurality of pixels in the first partition;
- one or more second scanning electrodes for scanning the second electron beam from the second cold cathode to each of the plurality of pixels in the second partition;
- one or more third scanning electrodes for scanning the third electron beam from the third cold cathode to each of the plurality of pixels in the third partition;
- and
- one or more fourth scanning electrodes for scanning the fourth electron beam from the fourth cold cathode to each of the plurality of pixels in the fourth partition.
Dependencies are inferred from the claim text.