US3928785A - Single gun, multi-screen, multi-beam, multi-color cathode ray tube - Google Patents

Single gun, multi-screen, multi-beam, multi-color cathode ray tube Download PDF

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Publication number
US3928785A
US3928785A US201460A US20146071A US3928785A US 3928785 A US3928785 A US 3928785A US 201460 A US201460 A US 201460A US 20146071 A US20146071 A US 20146071A US 3928785 A US3928785 A US 3928785A
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United States
Prior art keywords
anode
cathode
ray tube
electron
cathode ray
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Expired - Lifetime
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US201460A
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English (en)
Inventor
Adrian W Standaart
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US201460A priority Critical patent/US3928785A/en
Priority to NL7202387A priority patent/NL7202387A/xx
Priority to JP4996172A priority patent/JPS5526581B2/ja
Priority to US00272795A priority patent/US3771002A/en
Priority to AU46768/72A priority patent/AU4676872A/en
Priority to GB2318875A priority patent/GB1417187A/en
Priority to GB5308072A priority patent/GB1417185A/en
Priority to GB5745773A priority patent/GB1417186A/en
Priority to IE1607/72A priority patent/IE36877B1/xx
Priority to AU49092/72A priority patent/AU469016B2/en
Priority to IL40889A priority patent/IL40889A/xx
Priority to CH1701572A priority patent/CH586462A5/xx
Priority to CA157,194A priority patent/CA977815A/en
Priority to CH636576A priority patent/CH584455A5/xx
Priority to SE7215206A priority patent/SE377981B/xx
Priority to IT54215/72A priority patent/IT973686B/it
Priority to FR7241517A priority patent/FR2169793B1/fr
Priority to EG487/72A priority patent/EG11007A/xx
Priority to AT999472A priority patent/AT334426B/de
Priority to BR825572A priority patent/BR7208255D0/pt
Priority to DE2257540A priority patent/DE2257540A1/de
Priority to AR245269A priority patent/AR198641A1/es
Priority to US369474A priority patent/US3914641A/en
Priority to BE132701A priority patent/BE801415A/xx
Priority to NL7309454A priority patent/NL7309454A/xx
Priority to AR251621A priority patent/AR202542A1/es
Priority to DK526774A priority patent/DK526774A/da
Priority to CA234,966A priority patent/CA983990A/en
Priority to CA234,967A priority patent/CA984889A/en
Application granted granted Critical
Publication of US3928785A publication Critical patent/US3928785A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • H01J29/503—Three or more guns, the axes of which lay in a common plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H01J31/201—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/48—Electron guns
    • H01J2229/50—Plurality of guns or beams
    • H01J2229/507—Multi-beam groups, e.g. number of beams greater than number of cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2231/00—Cathode ray tubes or electron beam tubes
    • H01J2231/12—CRTs having luminescent screens
    • H01J2231/121—Means for indicating the position of the beam, e.g. beam indexing

Definitions

  • ABSTRACT A single cathode ray tube envelope having a plurality of phosphor screen areas thereon providing a plurality of individual screens contained in a single glass envelope. Multiple beams are provided from a single electron gun construction having a single cathode, a single control grid panel, a first anode panel, and either a deflection yoke or a deflector plate assembly.
  • a number of advantages arise from being able to provide a plurality of individual visual displays on phosphor screens or individual phosphor screen areas disposed close to each other for monitoring or viewing by a single observer.
  • cathode ray tube readouts from telemetry or sensing apparatus wherein the displays on different screens or screen areas are in distinctive colors, for example green for one screen, yellow for another screen, and red for another screen, can be useful in displaying certain information because of the color of the phosphor in the particular screen and thus the color of the image produced.
  • plural screens such as a two to six screen cathode ray tube, with the image on each screen being derived from a different television station or closed circuit television camera, to permit the viewer to simultaneously monitor two or more television images.
  • the plurality of screens and electron-beams is also advantageous for oscilloscope wave-form displays, since as many as six individual inputs can be simultaneously viewed without time-sharing or electronic switching.
  • An object of the present invention is the provision of a novel multi-screen, multi-beam cathode ray tube having a single glass envelope and a single electron gun capable of producing a plurality of separate electron beams which are individually controlled and correspond in number to a plurality of phosphor screens for producing plural individual images.
  • two or three beams in a single horizontal row can be provided for producing images on two or three horizontally spaced phosphor screen areas on the faceplate, to provide two or three separate images.
  • two vertically spaced rows of three separate electron beams each, all derived from a single electron gun, can be provided to activate and produce images on two vertically spaced rows of three phosphor screen areas each, thus providing six different phosphor screens in a single cathode raytube glass envelope.
  • Another example enables intermixing of single electron-beams, in a single horizontal row, with multiple (3) electron-beams on a verticalaxis for color TV images on one or more.
  • tri-colo'r phosphor screens composed of horizontally distributed strips, approximately 0.010 to 0.018 inches wide, of'color producing phosphors in Magenta, Cyan and Green illumination or fluorescence.
  • Another object of the present invention is the provision of anovel electron gun construction for cathode ray tubes capable of producing one or'more vertically spaced rows of one or more electron beams each, each of which electron beams may be individually convertical electrostatic deflection plates supported on a single electron gun frame structure with a first anode and grid panels and a single cathode structure.
  • FIG. 1 is a perspective view of a multi-screen kinescope cathode ray tube construction having a single electron gun, embodying the present invention, capable of producing three side-by-side separate screen images;
  • FIG. 2 is a perspective view of another embodiment of a multi-screen cathode ray tube constructed in accordance with the present invention having a single electron gun and providing six separate phosphor screen areas on the faceplate;
  • FIG. 3 is a vertical section view of the multi-screen cathode ray tube of FIG. 2, taken along the lines 33 of FIG. 4;
  • FIG. 4 is a vertical longitudinal section view taken along the line 4-4 of FIG. 3;
  • FIG. 6 is an enlarged side elevation view of the electron gun
  • FIG. 7A is an elevation view of the screen grid and first anode hole pattern for a six screen tube having a tri-color screen as the center screen of the top row.
  • the screen 14A could be of a phosphor which produces red light
  • the screen 148 could be of a phosphor which produces yellow light
  • the screen 14C of a phosphor which produces green light. If the cathode ray tube were used as a telemetry readout in connection with missile launching, the appearance of an image on the green producing phosphor screen 14C would indicate that everything was in satisfactory condition, the presence of an image on the yellow phosphor producing' screen 14B could indicate a caution condition, and an imageon the red phosphor producing screen 14A could indicate a hold condition or a danger condition.
  • the faceplate may be provided with outwardly protruding depressions, as illustrated at 24C and 24E in FIG.
  • the electron gun assembly for this cathod ray tube is indicated generally at and is located in the rear portion of the glass neck section 11, and the usual deflection yoke 16 to effect magnetic deflection of the electron beams surrounds the neck portion 11 in accordance with standard practice.
  • the electron gun 15 is of the multi-beam type, to be later described in detail, which in this embodiment produces three laterally alined individual electron beams, schematically indicated at 17A, 17B and 17C in FIG. 1.
  • the phosphors for the various screens 24A to 24F may be selected so that the screens 24A, B and C respectively reproduce in green, red and blue, and the lower row of screens 24D, E and F reproduce in white, yellow and orange.
  • one or more of the screens may be a screen producing a composite color image formed of three basic phosphor colors as is customary in color television.
  • FIG. 5 The details of construction of the electron gun for the embodiment of FIGS. 2 through 4 are illustrated in FIG. 5, which incorporates electrostatic deflection plates in the electron gun assembly for vertical and horizontal deflection and sweeping of the associated electron beam.
  • the electron gun assembly for multiscreen, multi-beam cathod ray tubes having a magnetic deflection yoke will be of similar construction but will not incorporate the electrostatic deflection plate components.
  • the electron gun includes a cathode generally indicated at 27, a control grid generally indicated at 28, a first anode 29,
  • the cathode 27 is formed from a pair of sheet members, such as nickel sheet members 35, 36, each having one or more parallel outwardly projecting rib or channel formations 35A, 36A having outwardly convergent, similarly inclined sides and a flat outer wall paralleling the main plane of the cathode, giving the channels a truncated isosceles triangular configuration. If a single horizontal row of plural electron beams is required, as where the plurality of phosphor screen areas are all horizontally alined in side-by-side relation as in FIG. 1, only a single channel formation is needed for the pair of sheet members 35, 36 forming the cathode.
  • the sheets 35 and 36 are assembled at each end, and between each of the elongated channel formations, by spot welding, thereby providing a most rigid and stable cathode design.
  • the filament windings are formed of spiral tungsten filaments 27F, insulated by an insulating layer of high temperature ceramic such as alumina or fused aluminum oxide.
  • This honeycomb design produced by the assembled sheets 35 and 36 having the outwardly projecting channel formations provides maximum resistance to heat warpage from heating the cathode to operating temperatures, thus assuring that the flat front face, indicated at 35B, will remain parallel to the control grid for maximum efficiency of electron emission.
  • the cathode flat areas 358 are coated by spray, paint, or electrophoretic deposits of standard cathode material, such as that referred to commercially as Tri-Carbonate, which is protected from atmosphere poisioning by a layer of organic lacquer until the cathode ray tube is activated in the final fabrication stages.
  • the rectangular parallel cathode surfaces 35B on which the cathode material is deposited are of sufficient axial length, extending from one end of the cathode to the other, to assure maximum electron emission from as many as seven controllable grid apertures at a current density to enable each electron beam to develop to microamperes of current.
  • the honeycomb structure herein described lends itself to rapid manufacture and ease of fabrication by machine stamping or die rolling.
  • the control grid, indicated by reference character 28, in the preferred embodiment is in the general configuration of a rectangular panel, similar to the panel or substrate for a printed circuit board, having a plurality of holes or apertures 28A arranged in a row or plural rows alined with the center axes of the flat or flats 35B of the cathode carrying the cathode material. Only a single row of three holes 28A are required for a three screen tube as shown in FIG. 1, while two rows of three holes 28A are employed for the six screen tube of FIG.
  • FIG. 7A An example of the hole pattern for the control grid and first anode for such a six screen tube is shown in FIG. 7A, illustrating three vertically spaced holes 28A-l, 28A-2 and 28A-3 for providing three beams for screen 248.
  • the beams for the holes 28A-1, 28A-2 and 28A-3 are scanned horizontally along their respective phosphor strips 248-], 248-2 and 243-3 to produce a tri-color image without a shadow mask.
  • the phosphor is deposited in strips of about 0.018 inch widths with a 0.002 inch space between strips and the holes 28A-1, 28A-2 and 28A-3 may be 0.010 inch diameter holes spaced on 0.020 inch centers.
  • the holes in the first anode, for the three color beams for screen 248, should be individually controlled as in the control grid.
  • the ceramic substrate is provided with the grid apertures, having an initial or unplated diameter in one example of 0.01 184 inches, each aperture having a stepped entrance and exit end formed by an annular slightly larger cross-section aperture portion at the entrance and exit ends, as illustrated and described in my earlier patent application entitled MULTl-BEAM CATHODE RAY TUBE CONSTRUCTION, filed Aug.
  • the ceramic substrate is provided with a goldplating, in such example, formed by first applying an initial thickness of approximately 1,000 angstrom units of gold by a vacuum process known as sputtering. This sputtered gold layer is applied to both surfaces of the substrate and to the inside walls of the grid apertures 28A to assure firm adhesion of the electroplated metallic gold to the ceramic substrate.
  • the control grid substrate is then electroplated to increase the thickness of the gold to 0.001 inch (or 0.025 millimeters).
  • copper may first be applied to the ceramic substrate, after which the substrate is then electroplated with nickel to provide a thickness of about 0.001 inch.
  • control grid After electroplating the control grid, it may then be given a coating of a photosensitive etch resist, such as Eastman-Kodak Company's KPR or KMER or KTFR resist.
  • a photosensitive etch resist such as Eastman-Kodak Company's KPR or KMER or KTFR resist.
  • This photosensitive etch resist is then exposed to a precision glass photographic plate containing a negative image of the control apertures and the attachment metal paths desired from the apertures to connecting terminals at the edge of the plate 28, and the resist is then processed in accordance with the manufacturer's recommendations to etch away the unwanted metal gold.
  • the first anode 29 is similar to the control grid 28 in that the ceramic substrate may be of the identical size and design as the control grid substrate and is likewise provided with apertures 29A corresponding in number and location to the apertures 28A in the control grid.
  • the control grid 28 contains six individual conductive attachment paths, where six apertures 28A are provided, leading to grid connections at the edges of the control grid
  • the first anode 29 has the surface facing away from the control grid, or. toward the target, provided with a layer of metallic gold like the one provided on the control grid before etching, with the layer of metallic gold on the first anode being broken only by the beam apertures 29A.
  • the other surface of the first anode 29, which faces the control grid contains no gold except for a rim around the apertures about 0.001 inch wide.
  • Each pair of a focusing anode 30 and an accelerating anode 31 may be formed of a pair of metallic tubes spaced along a common axis and electrically isolated from each other, with the rearmost end of the focusing anode tube 30 fixed in an opening of corresponding diameter in the ceramic supporting plate 32, while the forward end of the accelerating anode tube 31 is similarly supported in a correspondingly sized opening in the ceramic supporting plate 33.
  • electrostatic deflector plates Forwardly of the assembly of the focusing anode tubes 30 and accelerating anodes 31 are the electrostatic deflector plates for each beam.
  • These electro' static deflector plates in the illustrated embodiment comprise vertical deflector plates 40 and horizontal deflector plates 41 for each beam defining a tube of rectangular cross-section surrounding the beam.
  • the plates 40 and 41 flare outwardly from the associated beam at the end nearest the faceplate, and are electrically isolated from each other and supported from the outer elongated frame members 34 and the interior elongated frame members 34A.
  • These frame members may be glass supporting rods having pins which extend inwardly to and join the respective elements which they support.
  • the honeyeombed cathode design provides a flat surface bearing the cathode emission material which is spaced the same distance from each of the grid apertures 28A to insure uniform electron emission for each of the electron beams and minimum cathode distortion from filament heat.
  • the control grid 28 and first anode 29 employing metallic gold provide a non-oxidizing or tarnishing metal conductor capable of maintaining excellent conductivity and provide freedom from prefabrication oxidation an ability to remain stable at tube fabrication or operating temperatures.
  • the accelerating anode tubes 30 and focusing anode tubes 31, and the horizontal and vertical deflector plates 40 and 41 when electrostatic deflection is required, are rigidly supported from the elongated glass frame members 34, 34A and the ceramic panels 32, 33, all collectively providing an electron gun construction which is capable of producing a number of electron beams of equal intensity in a most efficient manner, and which provides improved properties and manufacturing capabilities.
  • an electron gun construction in a single glass envelope with a faceplate having a plurality of phosphor target screens, individual electron beams for each of the screens are provided in an efficient manner by a single electron gun permitting great flexibility in the type of display which can be accomplished with the cathode ray tube.
  • the arrangement of successive groups of three vertically spaced hori'zontal strips of tri-color phosphor, such as shown at 2413-1, 2411-2 and 2413-3 in FlG. 7, for the screen 2411, may be used for the screen of a singlescreen cathode ray tube, to produce a tri-color image for color television receivers and the like.
  • the control grid and first anode would simply have three vertically spaced holes each, sized and arranged relative to each other like the holes 28A-l, 28A-2 and 28A-3 of HG. 7A.
  • a single gun, multi-screen, multi-beam, multicolor cathode ray tube construction for producing visible images comprising a glass envelope including a neck portion and a faceplate portion, said faceplate portion having a plurality of individual phosphor screens arranged serially along a reference axis in at least one rectilinear row over the area of said faceplate portion, each said screen being adapted to produce an image for direct viewing, upon electron-activation of the phosphors, a single electron gun within said neck portion for producing a plurality of electron beams at least equalling in number the number of screens, said electron gun including a single cathode having a narrow elongated flat strip surface for each said row with its longitudinal center axis paralleling said reference axis and lying in a transverse plane transversely spanning the cathode and facing the screens, a coating of electron emission material on said flat strip surface which is thermally activated to emit electrons for forming the electron beams, control grid and first anode elements in spaced planes
  • control grid is formed of a rectangular non-conductive substrate panel having said holes therethrough alined respectively with said flat strip surface, said control grid having an electrically conductive layer of deposited material lining each of the holes communicating with like deposited conductive material arranged in a photo-etched pattern of conductive paths connecting the hole linings to edge terminals for applying selected potentials to the lining material for individual control of the electron beams.
  • a single gun, multi-screen, multi-beam, multicolor cathode ray tube construction for producing visible images comprising a glass envelope including a neck portion and a faceplate portion, said faceplate portion having a plurality of individual phosphor screens arranged serially along a pair of vertically spaced parallel reference axes in a pair of vertically spaced horizontal rows of at least two screens each over the area of said faceplate portion, each screen being adapted to produce an image for direct viewing upon electro-activation of the phosphor, a single electron gun within said neck portion for producing a plurality of electron beams at least equalling in number the number of screens, said electron bun including a single cathode having a narrow, elongated flat strip surface for each said row tith its longitudinal axis paralleling said reference axes lying in a transverse plane transversely spanning the cathode and facing the screens, a coating of electron emission material on said flat strip surface which is thermally activated to emit electrons for forming the electron beams, control grid
  • control grid and first anode are each formed of a rectangular non-conductive substrate panel having holes therethrough alined with the axes of each of the respective beams to be formed, lined with an electrically conductive layer of deposited material, the panels being disposed in parallelism with each other and with said flat surface portions and the control grid having a deposited layer of conductive material arranged in a photo-etched pattern of conductive paths communicating with the hole linings for application of separate distinctive control voltages to the linings of the respective holes therein.
  • a cathode ray kinescope tube construction for producing tri-color visible images without a shadow mask, comprising a glass envelope including a neck portion and a faceplate portion, said faceplate portion having a phosphor screen formed of successive vertically arranged horizontal bands each comprising three vertically spaced horizontal strips of a first, second and third color producing phosphor, a single electron gun within said neck portion for producing three electron beams for the three color producing phosphors respectively, said electron gun including a single cathode comprising a pair of joined metallic sheet members each having a plurality of outwardly projecting truncated V-shaped formations collectively defining plural six-sided channels of substantially honeycomb configuration in side elevation providing an elongated, narrow rectilinear planiform flat face paralleling said phosphor screen and spanning the width of the cathode, the channel formation housing a coiled filament wire along the length thereof closely conforming to the cross-section of the channels, a coating of electron emission material on said flat face which is thermally activate

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • Electron Sources, Ion Sources (AREA)
US201460A 1971-11-23 1971-11-23 Single gun, multi-screen, multi-beam, multi-color cathode ray tube Expired - Lifetime US3928785A (en)

Priority Applications (29)

Application Number Priority Date Filing Date Title
US201460A US3928785A (en) 1971-11-23 1971-11-23 Single gun, multi-screen, multi-beam, multi-color cathode ray tube
NL7202387A NL7202387A (xx) 1971-11-23 1972-02-23
JP4996172A JPS5526581B2 (xx) 1971-11-23 1972-05-22
US00272795A US3771002A (en) 1971-11-23 1972-07-18 Single gun, multi-beam color cathode ray tube
AU46768/72A AU4676872A (en) 1971-11-23 1972-09-18 Color cathode ray kinescope tube
GB2318875A GB1417187A (en) 1971-11-23 1972-11-17 Electron gun
GB5308072A GB1417185A (en) 1971-11-23 1972-11-17 Cathode ray tube construction
GB5745773A GB1417186A (en) 1971-11-23 1972-11-17 Cathode ray tube
IE1607/72A IE36877B1 (en) 1971-11-23 1972-11-20 Cathode ray tube construction
IL40889A IL40889A (en) 1971-11-23 1972-11-21 A multi-beam cathode ray tube
AU49092/72A AU469016B2 (en) 1971-11-23 1972-11-21 Electron guns for use in cathode ray tubes
IT54215/72A IT973686B (it) 1971-11-23 1972-11-22 Perfezionamento nei tubi a raggi catodici per la presentazione di immagini a colori
CH636576A CH584455A5 (xx) 1971-11-23 1972-11-22
SE7215206A SE377981B (xx) 1971-11-23 1972-11-22
CH1701572A CH586462A5 (xx) 1971-11-23 1972-11-22
FR7241517A FR2169793B1 (xx) 1971-11-23 1972-11-22
EG487/72A EG11007A (en) 1971-11-23 1972-11-22 Cathode ray tube construction wherein a single electron gun
CA157,194A CA977815A (en) 1971-11-23 1972-11-22 Cathode ray tube construction
AR245269A AR198641A1 (es) 1971-11-23 1972-11-23 Canon electronico
BR825572A BR7208255D0 (pt) 1971-11-23 1972-11-23 Tubo de raios catodicos
DE2257540A DE2257540A1 (de) 1971-11-23 1972-11-23 Mehrstrahl-kathodenstrahlroehre
AT999472A AT334426B (de) 1971-11-23 1972-11-23 Mehrstrahl-kathodenstrahlrohre
US369474A US3914641A (en) 1971-11-23 1973-06-13 Electron gun construction for multi-beam color cathode ray tube
BE132701A BE801415A (fr) 1971-11-23 1973-06-25 Tube a rayons cathodiques multifaisceau
NL7309454A NL7309454A (xx) 1971-11-23 1973-07-06
AR251621A AR202542A1 (es) 1971-11-23 1973-12-20 Tubo de rayos catodicos
DK526774A DK526774A (xx) 1971-11-23 1974-10-08
CA234,966A CA983990A (en) 1971-11-23 1975-09-08 Cathode ray tube construction
CA234,967A CA984889A (en) 1971-11-23 1975-09-08 Cathode ray tube construction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201460A US3928785A (en) 1971-11-23 1971-11-23 Single gun, multi-screen, multi-beam, multi-color cathode ray tube
US27279572A 1972-07-18 1972-07-18

Publications (1)

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US3928785A true US3928785A (en) 1975-12-23

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US201460A Expired - Lifetime US3928785A (en) 1971-11-23 1971-11-23 Single gun, multi-screen, multi-beam, multi-color cathode ray tube
US00272795A Expired - Lifetime US3771002A (en) 1971-11-23 1972-07-18 Single gun, multi-beam color cathode ray tube

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00272795A Expired - Lifetime US3771002A (en) 1971-11-23 1972-07-18 Single gun, multi-beam color cathode ray tube

Country Status (16)

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US (2) US3928785A (xx)
AR (2) AR198641A1 (xx)
AT (1) AT334426B (xx)
AU (2) AU4676872A (xx)
BE (1) BE801415A (xx)
CA (1) CA977815A (xx)
CH (2) CH584455A5 (xx)
DE (1) DE2257540A1 (xx)
EG (1) EG11007A (xx)
FR (1) FR2169793B1 (xx)
GB (3) GB1417186A (xx)
IE (1) IE36877B1 (xx)
IL (1) IL40889A (xx)
IT (1) IT973686B (xx)
NL (2) NL7202387A (xx)
SE (1) SE377981B (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009963A2 (en) * 1978-10-04 1980-04-16 English Electric Valve Company Limited Display arrangements
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WO1994018691A1 (en) * 1993-02-10 1994-08-18 Chen Hsing Yao Multi-beam group electron gun for color crt
DE4307614A1 (de) * 1993-03-08 1994-09-15 Bbpt Bildungs Und Beschaeftigu Farb-Informationsdisplaysystem mit Elektronenstrahlanzeigeröhre
DE202006016221U1 (de) * 2006-10-19 2008-03-13 Wik Far East Ltd. Wasserkocheinrichtung
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Cited By (12)

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Publication number Priority date Publication date Assignee Title
EP0009963A2 (en) * 1978-10-04 1980-04-16 English Electric Valve Company Limited Display arrangements
EP0009963A3 (en) * 1978-10-04 1980-04-30 English Electric Valve Company Limited Display arrangements
US4488093A (en) * 1981-03-31 1984-12-11 Tektronix, Inc. Color shadow mask cathode ray tubes
US4607188A (en) * 1985-04-03 1986-08-19 North American Philips Consumer Electronics Corp. Monochrome cathode ray tube for use as a color reference
US4777407A (en) * 1986-01-22 1988-10-11 Kabushiki Kaisha Toshiba Color cathode ray tube device
WO1994018691A1 (en) * 1993-02-10 1994-08-18 Chen Hsing Yao Multi-beam group electron gun for color crt
US5350978A (en) * 1993-02-10 1994-09-27 Chunghwa Picture Tubes, Ltd. Multi-beam group electron gun for color CRT
DE4307614A1 (de) * 1993-03-08 1994-09-15 Bbpt Bildungs Und Beschaeftigu Farb-Informationsdisplaysystem mit Elektronenstrahlanzeigeröhre
DE4307614C2 (de) * 1993-03-08 1999-10-14 Bernhard Gerth Farb-Informationsdisplaysystem mit Elektronenstrahlanzeigeröhre
DE202006016221U1 (de) * 2006-10-19 2008-03-13 Wik Far East Ltd. Wasserkocheinrichtung
US20130057781A1 (en) * 2011-09-01 2013-03-07 Kabushiki Kaisha Toshiba Television receiver and electronic device
US8502928B2 (en) * 2011-09-01 2013-08-06 Kabushiki Kaisha Toshiba Television receiver and electronic device

Also Published As

Publication number Publication date
AU4909272A (en) 1974-05-23
CA977815A (en) 1975-11-11
CH584455A5 (xx) 1977-01-31
GB1417186A (en) 1975-12-10
AU469016B2 (en) 1976-01-29
FR2169793B1 (xx) 1978-04-21
DE2257540A1 (de) 1973-05-30
IE36877B1 (en) 1977-03-16
IL40889A0 (en) 1973-01-30
AR198641A1 (es) 1974-07-15
NL7309454A (xx) 1974-01-22
NL7202387A (xx) 1973-05-25
AT334426B (de) 1976-01-10
AU4676872A (en) 1974-03-28
CH586462A5 (xx) 1977-03-31
BE801415A (fr) 1973-10-15
AR202542A1 (es) 1975-06-24
IL40889A (en) 1975-03-13
SE377981B (xx) 1975-08-04
FR2169793A1 (xx) 1973-09-14
US3771002A (en) 1973-11-06
ATA999472A (de) 1976-05-15
GB1417185A (en) 1975-12-10
IE36877L (en) 1973-05-23
IT973686B (it) 1974-06-10
GB1417187A (en) 1975-12-10
EG11007A (en) 1977-04-30

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