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7135821 |
High-definition cathode ray tube and electron gun
A high-definition CRT is provided having an electron gun to produce high beam current without increasing spot size and to provide lower electrical power requirements at high beam-modulation...
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7122977 |
Cathode-ray tube apparatus
A prefocus lens section is formed by a screen electrode and an additional electrode. A main lens section is formed by a focus electrode, an anode electrode and an intermediate electrode that is...
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6696789 |
Color picture tube device
The present invention provides a high-resolution color picture tube device with a decreased beam spot diameter. The color picture tube device has an electron gun including cathodes, a control...
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6512339 |
CRT display device
In a CRT display device including a CRT (MM tube) having brightness higher than that in the background-art CRT, it is an object of the present invention to improve contrast and prevent conspicuous...
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6462487 |
Method of operating a cathode-ray tube electron gun
A method for operating a cathode-ray tube electron gun, suitable for multimode operation, for example, in order to display television images and multimedia images of the SVGA, XGA type, in which...
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6320333 |
Color picture tube
A color picture tube of the present invention comprises three in-line cathodes (1a, 1b, 1c) aligned in the horizontal direction, a first focussing electrode (4) supplied with a focus voltage, a...
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5977727 |
Electron beam profile and energy shaping lens
An apparatus and method to dynamically shape the projected energy profile of an electron beam and the energy distribution of an electron beam of a cathode ray tube to provide a single cathode ray...
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5726539 |
Color cathode ray tube display system
The display system comprises a colour cathode ray tube. The colour cathode ray tube comprises an in-line electron gun with a distributed main lens (DML). The final electrode (anode) of the DML...
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5574331 |
In-line electron gun for a color picture tube
An in-line electron gun for a color picture tube has an accelerating electrode portion separated into two or three electrodes in a triode, in which a voltage supplied to respective electrodes is...
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5489814 |
Focusing means for cathode ray tubes
A cathode ray tube comprising a cathode (K) for emitting a beam of electrons; a grid (G) for controlling the intensity of the beam; three or more anodes (A1, A3, A4); a control for varying the...
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5034654 |
Beam focusing means for a CRT electron gun assembly
The gun comprises a cathode, a control grid, a first anode a second anode and a third anode. Preferably a beam width limiting aperture is provided in the first anode. In one example the current...
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5015910 |
Electron gun for color picture tube
A novel electron gun for the color picture tube is disclosed, which comprises at least a cathode for emitting three electron beams in alignment and focusing electrodes for focusing the electron...
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4935663 |
Electron gun assembly for color cathode ray tube apparatus
In an electron gun assembly, three electron beams emitted from cathodes are passed through an electrode arrangement in which two intermediate electrodes are arranged between focusing are...
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4885505 |
Electron gun assembly
In an electron gun assembly, three electron beams emitted from cathode are focused by focusing electrodes and directed to accelerating electrodes through intermediate electrode. Three electron...
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4607935 |
Roller transfer apparatus
Apparatus for electrostatically transferring a transferable image of electroscopic marking particles from an image-carrying member to a receiver member. The apparatus comprises an electrically...
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4591760 |
Cathode ray tube apparatus
An electron gun has five grids (G 1 , G 2 , G 3 , G 4 , G 5 ), and an additional grid (G 2s ) is disposed between the second grid and the third grid (G 3 ) and is impressed with a potential lower...
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4540916 |
Electron gun for television camera tube
An electron gun for a television camera tube comprises a cathode for emission of electrons, a first grid disposed subsequently to the cathode and having a first aperture supplied with a positive...
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4514661 |
Arc-suppression means for an electron gun having a split electrode
An electron gun comprises at least one cathode for generating an electron beam along a beam path and a plurality of electrodes serially disposed along the beam path. The electrodes include at least...
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4368405 |
Electron gun for a cathode ray tube
A cathode ray tube electron gun having an electron beam-generating source and a main lens system for focusing electron beams emitted from said electron beam-generating source, wherein the main lens...
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4345185 |
Cathode ray tube apparatus
A cathode ray tube apparatus in which a discharge current suppressing means is inserted into the discharge current flowing path between the final electrode of the electron gun of a cathode ray tube...
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4344017 |
Cathode ray tube used as light source
The disclosed cathode ray tube for use as a light source has an electron gun including a first, a second and third grid electrodes similar to conventional three electrode electron guns but the...
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4334170 |
Means and method for providing optimum resolution of T.V. cathode ray tube electron guns
A novel electron gun for use in television cathode ray tubes of the direct view or projection type is disclosed. The cathode ray tube has associated therewith a power supply for developing a...
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4277722 |
Cathode ray tube having low voltage focus and dynamic correction
A cathode ray tube comprises two electron lens means in combination to crossover the electron beam at a second crossover between the two electron lens means with one of the two lens means having a...
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4276495 |
Electron gun for cathode-ray tube
In an electron gun for cathode-ray tube comprising a lens system constructed by four cylindrical electrodes concentrically arranged apart from each other for focusing electron beams emitted from a...
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4253041 |
Extended field electron gun having a synthesized axial potential
An electron gun for a television cathode ray tube is disclosed having cathode means and grid means for producing a beam of electrons. A low-aberration, low-magnification main focus lens means...
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4243911 |
Resistive lens electron gun with compound linear voltage profile
The electron gun includes a pair of electrodes between which a resistive lens structure comprising a stack of alternate apertured plates and resistive blocks is disposed. A first portion of the...
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4243912 |
Simplified resistive lens electron gun with compound linear voltage profile
The electron gun includes a pair of electrodes between which a resistive lens structure comprising a stack of alternate apertured plates and resistive blocks is disposed. The stack comprises a...
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4218634 |
Electron gun
An electron gun comprising a plurality of focusing grids spatially arranged along the path of an electron beam generated from a cathode and each bored with at least one opening for allowing the...
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4201933 |
Electron gun structure for a pickup tube
An electron gun structure for a pickup tube comprises a cathode lens electrode assembly, a beam disc electrode and a main lens electrode assembly. The main lens electrode assembly includes first...
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4169239 |
Electrostatically focusing type image pickup tubes and method of manufacturing the same
The electron lens of an electrostatically focusing type image pickup tube comprises three coaxially arranged cylindrical electrodes and the inner diameters thereof are decreased from the side of a...
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4168452 |
Tetrode section for a unitized, three-beam electron gun having an extended field main focus lens
This disclosure depicts an electron gun especially for use in a color cathode ray tube of the small-neck, shadow-mask type. The gun design is also applicable to other television cathode ray tube...
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4095138 |
Electron gun having an arc-inhibiting electrode
Arc-inhibiting means for a television picture tube having an electron gun with a main focus lens section of the extended field type. The lens establishes an extended, axially continuously active...
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4058753 |
Electron gun having an extended field beam focusing and converging lens
This disclosure depicts an electron gun for use in a color cathode ray tube of the small neck, shadow mask-type. The gun includes an extended field lens for generating a cluster of electron beams...
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4052643 |
Electron guns for use in cathode ray tubes
In an electron gun for use in a cathode ray tube of the class wherein a main electron lens system is constituted by a plurality of discrete electron lens systems, the plurality of electron lens...
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4009410 |
Cathode-ray tubes electron-guns
An electron-gun for cathode-ray tubes comprising, by comparison with prior art guns, at least one supplementary electrode (6) of the diaphragm type, arranged between the accelerator grid (3) and...
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3995194 |
Electron gun having an extended field electrostatic focus lens
A television cathode ray tube has associated therewith a power supply for developing discrete supply voltages. A general purpose electron gun is depicted for receiving supply voltages from the...
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3987329 |
Electron gun with first of plurality of independent lens systems having greater focusing power
In an electron gun for use in a cathode ray tube of the class wherein a main electron lens system is constituted by a plurality of discrete electron lens systems, the plurality of electron lens...
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3946268 |
Field emission gun improvement
A field emission gun for use in an instrument such as an electron microscope including the field emission tip, an extraction electrode and focusing and accelerating anode means wherein there is...
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3934170 |
Image tube and method and apparatus for gating same
In an image tube, a photocathode is disposed to receive a photon image for emitting into the tube a corresponding electron image which is accelerated by an accelerating anode and focused upon an...
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3895253 |
Electron gun having extended field electrostatic focus lens
A color cathode ray tube includes an in-line or delta cluster of electron guns each having an improved electron focus lens. The electron lens provides reduced spherical aberration when compared...
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3868536 |
Image intensifier tube employing a microchannel electron multiplier
In an image intensifier tube, photon images received by a photocathode are converted into electron images which are accelerated by an accelerating anode and focused upon the input face of a...
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3863091 |
ELECTRON GUN ASSEMBLY WITH IMPROVED UNITARY LENS SYSTEM
An electron gun assembly for use in a cathode ray tube provided with a main lens system for focusing electrons emitted from a cathode electrode, comprising at least three focusing electrodes...
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3852637 |
ELECTRON GUN STRUCTURE WITH UNIPOTENTIAL AND BIPOTENTIAL LENS
An electron gun structure having a main focusing lens including a unipotential electron lens and a bipotential electron lens, the unipotential and bipotential electron lenses serving as a single...
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3786302 |
ELECTROSTATIC LENS FOR CATHODE RAY TUBES
An electrostatic lens constructed of cylindrical tube sections for cathode ray tubes having two terminal electrodes and a center electrode. The terminal electrodes have a high positive potential...
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3733492 |
GATEABLE IMAGE INTENSIFIER TUBE
An image intensifier tube comprising an elongated envelope having therein axially spaced electrodes including a gateable photocathode located adjacent an input faceplate at one end of the envelope...
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3731136 |
CYLINDRICAL ELECTRODE SYSTEM FOR FOCUSING AND DEFLECTING AN ELECTRON BEAM
An electron optical system permitting both focusing and deflection of an electron beam utilizes a plurality of sets of electrodes, each set of electrodes comprising two pairs of conductive coatings...
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3688026 |
METHOD AND SYSTEM FOR THE DOT-PATTERN RECORDING OF HALF-TONE IMAGES
A method for half-tone dot reproduction of continuous-tone images transmitted by facsimile or television, wherein use is made of a CRT having a focusing lens with three consecutive electrodes. The...
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3569772 |
CATHODE RAY TUBE HAVING AN ELECTROSTATIC ACCELERATING LENS
A tube envelope having a neck portion, a faceplate carrying a target electrode, and a large-diameter portion disposed between the neck portion and the target electrode and joined to the neck...
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3567991 |
CATHODE RAY TUBE WITH IMPROVED ELECTRON GUN STRUCTURE
A cathode ray tube is provided with an electron gun structure including a cathode, a small apertured grid, and a small apertured anode on the remote side of the grid from the cathode. In addition,...
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3555346 |
VACUUM TUBES
An improvement is made in a known vacuum tube arrangement in which information is stored as a modulated electron stream traveling to and fro through a drift region between reflecting meshes,...
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