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8084932 Electron beam apparatus and image display apparatus using the same  
Deformation of a gate by Coulomb force generated when operating an electron-emitting device is inhibited by appropriately maintaining relationship between film thickness h of the gate and distance...
7892062 High-definition cathode ray tube and electron gun with lower power consumption  
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...
7772771 Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube  
The present invention relates to an alkali metal generating agent and others for formation of a photo-cathode or a secondary-electron emitting surface capable of stably generating an alkali metal....
7772755 Thermionic emission device  
A thermionic emission device includes an insulating substrate, and one or more grids located thereon. Each grid includes a first, second, third and fourth electrode down-leads located on the...
7764008 Electron beam gun  
An electron beam gun with an arched shaped beam former as an integral part of a massive cathode block which conducts heat away from the beam former and with a filament mounted to the cathode block...
7576481 High voltage stable cathode for x-ray tube  
A method of producing a cathode for use in an x-ray tube assembly is provided including machining an emission aperture into a cup emission surface portion of a cup structure. The cup structure is...
7439664 Low consumption cathode structure for cathode ray tubes  
Cathode structure for cathode ray tube comprising an eyelet in two separate parts positioned such that one of the parts covers, in the longitudinal direction and at least partially, the second...
7312564 Cathode ray tube having an electron gun  
A cathode ray tube has an electron gun oriented along an axis (Z), comprising a quadrupolar device which comprises three electrodes (5, 6, 7). Each electrode possesses a central aperture, a right...
7307378 In-line type electron gun and color cathode ray tube apparatus using the same  
An in-line type electron gun using a field superimposing type main lens system is provided that can attain good focusing properties by decreasing the size of the electron beam spot on the entire...
7294955 Electrode for electron gun and electron gun using same  
An electrode for an electron gun and an electron gun using same are provided which make use of stable carbon material having small work function and which permit orientation control to be achieved...
7276847 Cathode assembly for indirectly heated cathode ion source  
A cathode in an indirectly heated cathode ion source is supported by at least one rod or pin. The cathode is preferably in the form of a disk, and the support rod is smaller in diameter than the...
7196461 Structure of electron gun for cathode ray tube  
The present invention relates in general to a cathode ray tube, more particularly, to a structure of an electron gun for enhancing resolution of a cathode ray tube. The structure of an electron gun...
7105996 Electron gun for color CRT  
An electron gun for a color CRT includes a main focusing lens unit that focuses the electron beams generated by a triode unit. The main focusing lens unit includes a first and a second...
7088034 Cathode-ray tube employing a separate grid structure to stabilize cathode current  
An electron gun assembly that emits three electron beams, which are arranged in line, toward a phosphor screen includes three cathodes arranged in line, three first grids arranged to face the...
7078851 Cathode ray tube  
The indirectly heated cathode structure includes a base metal having a thermal electron emitting material layer, a cylindrical sleeve holding the base metal at one end portion thereof and housing a...
7030550 Electron emission device with multi-layered fate electrode  
Low-cost electron emission device and field emission display using a cold cathode electron source having a high electron beam utilization efficiency and capable of controlling the spread of the...
7005789 Method and apparatus for magnetic focusing of off-axis electron beam  
Axially symmetric magnetic fields are provided about the longitudinal axis of each beam of a multi-beam electron beam device. The magnetic field symmetry is independent of beam voltage, beam...
6992427 High-yield cathode body, cathode sleeve structure, and cathode-ray tube, cathode sleeve substrate, and cathode body production method  
A cathode sleeve structure for housing a heater. The cathode sleeve structure includes: a case member that is cylindrical and an end thereof is open; a plurality of supporting members that extend...
6946781 Cathode with optimized thermal efficiency  
A cathode structure for an electron gun of a cathode-ray tube having a reduced size and providing a fast cathode start-up time and excellent thermal efficiency. The cathode comprises a closed...
6946784 Electron gun of monochromic CRT  
The present invention is to provide an electron gun of a monochromic CRT comprising at least two electron emission sources (e.g., cathodes) for emitting beams having a small beam spot size and...
6943489 High resolution CRT device comprising a cold cathode electron gun  
The CRT device comprises a cold cathode electron gun that includes cathodes, a peripheral focusing electrode, and an accelerating electrode. The cathode has a structure in which an emitter...
6917148 Oxide cathode for an electron gun, having a denser and thinner emissive zone  
Cathode comprising a substrate (2) supporting a cathode emissive coating, comprising what is called an emissive central zone (12) and what is called a nonemissive peripheral zone (11); according to...
6903501 Electron gun assembly for cathode ray tube  
An electron gun for a monochrome cathode ray tube to be used in a projection display device includes a cathode for emitting thermal electrons, and first and second electrodes forming a triode...
6903499 Electron gun and a method for using the same  
An electron gun includes an electron emission cathode, a control electrode, and an extractor and the electron emission cathode is made of rare earth hexaboride. A tip of the electron emission...
6897605 Cathode assembly and color picture tube utilizing the same  
A cathode assembly includes an insulation member, three holders arranged inline in the insulation member, and a support member having a rim portion in which the insulation member is inserted and...
6891321 Oil-free electron source having cathode and anode members adjustable with five degrees of freedom  
An electron source includes a vacuum chamber within which a vacuum is maintained by a vacuum pump. An insulated receptacle is mounted within the vacuum chamber and has a receptacle mounting flange....
6870310 Multibeam generating apparatus and electron beam drawing apparatus  
This invention provides a multielectron gun which generates a plurality of electron beams having uniform characteristics. A multielectron gun (2) is formed of a plurality of electron guns (2a-2c)....
6864625 Color pixel element cathode ray tube  
Color CRTs, used in large display screens, have a plurality of three color electron beams that are strongly focused so that they crossover and become divergent in both the X and Y axes if the CTR's...
6847158 Electrode structure for electron gun  
An electron gun for a cathode-ray tube comprises a dish-shaped control electrode. The electrode is made from three separate components: a substantially plane component drilled with apertures so as...
6815913 Cathode ray tube  
The present invention provides a cathode ray tube which exhibits a favorable contrast by enhancing a speed modulation effect. A front-stage anode electrode and a focus electrode which constitute an...
6744190 Cathode ray tube with modified in-line electron gun  
Cathode ray tube having an electron gun which is modified with respect to the electron gun having three equidistant cathodes lying “in line”. The cathode for generating the green (central) beam is ...
6741021 Electron gun and production method thereof  
An electron gun includes a grid electrode having a thin plate portion in which an electron beam aperture is formed, wherein the thin plate portion is formed by using a die and punch die to bulge a...
6734609 Cathode in CRT and method for fabricating the same  
The present invention relates to a cathode in a cathode ray tube which can shorten a picture presentation time lag and reduce power consumption. The cathode includes an emission layer at an upper...
6710534 Traveling wave tube having multilayer carbon-based emitter  
An electron field emission device is provided by placing a substrate in a reactor, heating the substrate and supplying a mixture of hydrogen and a carbon-containing gas at a concentration of about...
6703776 Cathode ray tube  
A cathode ray tube comprising an electron source and an electron beam guidance cavity having an input aperture and an output aperture, wherein at least a part of the wall of the electron beam...
6703777 Adjusting method for cathode position of an electron gun and an electron gun for a cathode ray tube  
In an adjusting method for a cathode position of an electron gun, an apex point of a dome-shaped cathode is detected and then a positional adjustment is executed by moving a first grid in a X-Y...
6680564 Field emission type cold cathode structure and electron gun using the cold cathode  
A field emission type cold cathode structure and an electron gun using the cathode are provided. The electron gun is capable of preventing electron emission error due to impurities etc. The...
6653771 Electron gun assembly and cathode ray tube apparatus  
The electron beam generating section in an electron gun assembly includes a cathode having an electron emitting surface. The surface of the cathode is divided into at least three regions of first,...
6614158 Electron gun arrangements having closely spaced cathode and electrode and a vacuum seal  
An electron gun arrangement includes a cathode having a front surface and control grid located in front of it. The control grid is mounted via a cylindrical support on a Kovar mount. The cathode is...
6586868 Color cathode-ray tube apparatus with multi-lens electron focusing and yoke deflection  
An electron gun structure applied to a color cathode-ray tube comprises a focus electrode, an ultimate acceleration electrode and at least one intermediate electrode disposed between the focus...
6577054 Electron gun for CRT with helical multi-lens electrode assembly  
An electron gun for cathode ray tubes (CRTs) with a helical multi-lens electrode assembly which is formed by coupling auxiliary electrodes to both ends of a helical resistive coil. The auxiliary...
6552485 Electron tube comprising a semiconductor cathode  
An electron tube provided with a semiconductor cathode for emitting electrons, which semiconductor cathode is arranged on a support, a source being arranged in the vicinity of the cathode, in...
6545403 Color cathode ray tube having a developed electron gun structure  
A color cathode ray tube having an improved electron gun, includes a quadrupole lens consisting of an independent static electrode having a static voltage applied thereto and a dynamic electrode...
6531813 Cathode ray tube having an improved cathode structure  
A color cathode ray tube having at least an evacuated envelope comprising a panel portion having a phosphor screen formed on an inner surface thereof, a neck portion, and a funnel portion...
6495953 Cold cathode electron gun  
To stabilize an emission current of cold cathode electron gun and extend its product life. A cold cathode electron gun comprises a cold cathode for emitting electrons by field-emission, a gate...
6495952 Cathode ray tube having an internal voltage-dividing resistor  
A cathode ray tube includes an electron gun having plural focus electrodes and an anode in its neck portion, a voltage-dividing resistor for producing an intermediate voltage applied to a first one...
6472808 Color cathode ray tube having electrostatic quadrupole lenses  
A color cathode ray tube includes third, fourth and fifth electrodes and an anode in its electron beam focusing section. A first-type electrostatic quadrupole lens is formed between first and...
6373182 Mounting for cathode in an electron gun  
Apparatus and method for mounting a field emission device having emitters and an extraction grid in an electron gun are provided. The apparatus may be adapted from parts of a conventional electron...
6369499 Electron gun with improved cathode venting  
Cathode venting for electron guns is improved by forming one or more vent holes around the apertures in the triode and any pre-focus lens. This configuration places the vent holes next to the...
6369494 Cathode structure and electron gun for cathode ray tubes  
The invention relates to a cathode structure intended to be inserted into an electron gun for a cathode-ray tube. The cathode comprises a cathode body on the end of which is placed an emissive...
Matches 1 - 50 out of 231 1 2 3 4 5 >