US2751519A - Electron beam controlling system - Google Patents

Electron beam controlling system Download PDF

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Publication number
US2751519A
US2751519A US164444A US16444450A US2751519A US 2751519 A US2751519 A US 2751519A US 164444 A US164444 A US 164444A US 16444450 A US16444450 A US 16444450A US 2751519 A US2751519 A US 2751519A
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Prior art keywords
electron
beam components
electron beam
tube
components
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US164444A
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Albert W Friend
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RCA Corp
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RCA Corp
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Priority to US164444A priority patent/US2751519A/en
Priority to ES0197847A priority patent/ES197847A1/es
Priority to FR1041824D priority patent/FR1041824A/fr
Priority to GB11977/51A priority patent/GB690155A/en
Priority to CH315443D priority patent/CH315443A/de
Priority to DER6021A priority patent/DE972941C/de
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/28—Arrangements for convergence or focusing

Definitions

  • udina Patented June 1 9, 1 955 mployedlt is an object of this invention to efiect substantial convergence -at all points in a .predetermined plane ,pf 21 rlur litytc' elect i s eam .a mrans t sm n eftam hodej ayt ube
  • Anothei' object of the invention is to, etfect substantial convergence at all pointsin .a predetermined plane of ,a ,plura lity of electron -,beams emanating respectively from a plurality, of electron gunsmountedin. spaced relationship to .the centraI raxisrofaa. cathodemay tube.
  • ,IStill ,anothenobject, of the invention is ..to efiechsub- ;stantial convergence .at .all .points .of -a predetermined plane of;.a plutalitypfelectron.beanncomponentshaving ,pat hsmpaced from ,the ,central ,axis .of Va cathodetay. .tube and. allnernanatingtfrom assingle electron gnnlocated substantially .on said .centrahtube axis.
  • a still -,further, .object oftheinvention is to. cilectclectrnmagnetically s ubstantial convergence .of .a plurality of ,elec'tron beam components whichhave paths spaced from sub-elemental phosphorarcas may' be-selectively-excited.
  • the apertured masking electrode and the luminescent screen may be approached from fferent angles by electron beam components substantially in, the same manner as effected in thenSchroeder tube Th expr ss e ec r .beam .c,, mp en ca sed inthisspec fic tion is ten ed t v t .typc. .9119 nhqrrexc tina le t oni en rg p uce b$'..
  • ECH Q un ,T iss e syrmas' l m .tiru li v em la n s q r 'thout, ceram cs- 9 the scope of this-inuention.
  • .lThael ctwn beam d flec nand the ram t m op tical convergence systems may. be eitherselectrpmag- ,netic ,o f electrostatic.
  • .in. .one .of .the,.,i1lus- ,trated embodiments of the,.invention,..tl1e beam deflection system is. electromagnetic andlhe electron-optical,system .is electrostatic. -In another illustrated.
  • Figure 1 is a graphical representation of one phase of the problem of effecting convergence of a plurality of electron beam components at all points in the plane of a target electrode;
  • Figure 2 is a graphical representation of another phase of the electron beam convergence problem
  • Figure 3 is an illustration of one form of electron optical system which may be embodied in a system according to this invention.
  • FIG. 4 is a circuit diagram of a television receiver embodying a form of the invention employed in conjunction with a cathode ray tube having a plurality of electron guns and an electrostatic dynamic electron-optical beam convergence system;
  • FIG. 5 is a circuit diagram of a television receiver embodying the invention in another form which uses a cathode ray tube having a single electron gun and an electromagnetic electron-optical system for effecting convergence of a spinning type of electron beam at all points in a plane of a target electrode.
  • the central longitudinal axis of the cathode ray tube is represented by the line 11.
  • the upper and lower electron beam components 12 and 13 respectively approach the axis 11 from substantially equal angles a.
  • the angles a will be referred to herein as the convergence angles of the electron beam components.
  • the line 14 represents the plane in which deflection of the electron beam components is assumed to be effected. In the absence of any deflection of the electron beam components 12 and 13 they converge at a point 15 on the axis 11 of the tube in the plane of a target electrode 16. It will be noted that the convergence point 15 is located substantially centrally in a vertical sense on the target electrode.
  • the target electrode 16 is provided with a plurality of apertures, one of which is located at the point 15. Both of the undeflected electron beam components 12 and 13 will pass through the aperture at an angle a with the axis 11. As a consequence, the beam components approach a luminescent screen (not shown in this figure) from different angles in order to excite selectively the phosphor areas thereof. It is necessary, however, for the successful operation of a device of this character that the electron beam components be made to converge at all other points in the plane of the target electrode 16. It will be demonstrated presently that, in order to effect such convergence, facilities in addition to the usual electron beam-deflecting system are required.
  • deflection of the electron beams 12' and 13 is to'be made vertically substantially in the plane of the drawing.
  • each of the electron beam components 12 and 13 is deflected upwardly through an angle +15.
  • the deflected beams then follow the broken lines 12a and 13a.
  • the axis 11 is deflected through the angle +b and therefore takes the position indicated by the broken line 11a.
  • the con vergence angle a between the deflected beam components 12a and 13a, respectively, and the deflected axis 11a remains unchanged.
  • the point 17 at which the deflected beam component 12a intersects the deflected axis 11a is considerably short of the plane of the target electrode 16. It also does not coincide with the point 18 at which the deflected beam component 13a intersects the deflected axis 11a.
  • the deflected beams 12a and 13a will not pass through the same aper ture in the target electrode 16. Consequently, two different elemental areas of the luminescent screen will be excited by the beams 12a and 13a.
  • the deflected beam component 12b intersects the deflected axis 11b at the point 19 which is spaced from a plane of the target electrode 16 a distance substantially equal to the spacing of the intersection of point 18 of the upwardly deflected beam component 13a and the axis 11a.
  • the downwardly deflected beam component 13b intersects the axis 11b at a point 20. This point is located substantially at the same distance short of the target electrode as the point 17 representing the intersection of the upwardly deflected beam component 12a and the axis 11a.
  • the are or curve 21 represents the locus of the intersections of the electron beam component 12 and the effective axis 11 of the tube.
  • the are or curve 22 is the locus of the intersections of the beam component 13 and the effective tube axis.
  • S is the distance between the plane of deflection and target electrode 16.
  • Se is the distance between the plane of deflection 14 and the intersection of the deflected beam component 13a and the tube axis 11a in the absencev of any dynamic beam convergence control.
  • the same equation, with the sign of angle a reversed, represents the curve 21.
  • a compromise target electrode configuration would be in the form of a curve 23 lying substantially midway between the arcs 21 and 22.
  • the curve 23 represents the locus of the convergence points of the electron beams 12 and 13
  • the curves 21 and 22 may be made to approach closely the shape of curve 23 by minimizing the convergence angles a. Nevertheless, such a target electrode configuration is not particularly adapted'for use in a television image reproducing device. In devices of such character it is desirable to provide the target electrodes with shapes which are as flat as possible.
  • Schroeder Patent No. 2,595,548 One representative example of a tri-color kinescope of the kind suitable for use in conjunction with the present invention is shown in the previously mentioned Schroeder Patent No. 2,595,548.
  • the Schroeder tube, and also the tube 46, is provided with three electron guns and a luminescent screen. The screen is selectively excited to produce differently colored light by electron beam components approaching it from different directions.
  • the tube 46 is provided with electron guns 47, 48 and 49. It will be understood that the electron guns preferably are symmetrically disposed with respect to one another and also relative to the central axis of the tube,
  • the tube 46 is provided with a luminescent screen 51 which is substantially flat as shown.
  • the screen 51 is mounted on a transparent plate which is supported in back of, and somewhat spaced from,'the end wall 52 of the tube. It is to be understood that such a structural arrangement is not intended to be limiting. Alternatively, it may be desirable in some instances to provide the luminescent screen directly upon the inner surface of the end wall of the tube.
  • the luminescent screen consists of a multiplicity of groups of phosphor areas or dots, each of sub-elemental dimensions capable respectively of emitting light of different colors when excited by impinging electrons.
  • the groups of phosphor areas may be arranged in any desired pattern such as clusters of small areas of circular, triangular, hexangular, or other configurations or the linear strips extending from one side of the screen to the other.
  • the tube 46 also is provided with an apertured masking electrode 53 mounted in back of, and in spaced relation to, the luminescent screen 51.
  • This electrode is provided with apertures conforming in shape substantially to the configuration of the phosphor groups. For example, in the case of substantially circular groups of phosphor areas, the apertures in the electrode 53 will be substantially circular.
  • One aperture for each group of phosphors preferably is provided.
  • the color kinescope 46 also is provided with a deflecting system which, in the present case, is an electromagnetic yoke 54.
  • the deflecting yoke is mounted in the usual manner about the outside of the neck portion of the kinescope.
  • the color kincscope also is provided, in accordance with this invention, with a dynamic electron-optical system located in the region between the electron guns and the deflecting yoke.
  • a dynamic electron-optical system located in the region between the electron guns and the deflecting yoke.
  • this electron-optical system is electrostatic and includes a cylindrical anode member 55 surrounding the paths of the electron beam components emanating from the three
  • this electrode it is necessary that the field produced by it and the final anode wall coating 55, be varied suitably as a function of both the horizontal and vertical deflections of the beam components to form the raster.
  • the angle of approach is fromv beam component, after traversing the aperture of the electrode 53, impinges upon a red light-emitting phosphor area 57.
  • the electron guns 48 and 49, respectively are actuated to produce electron beam components which approach the electrode 53 from angles represented by the lines 58 and 59, respectively.
  • the green and blue sub-elemental phosphor areas 61 and 62, respectively are selectively excited.
  • the synchronizing signal channel 45 of the color television signal-receiving system may be considered to include the usual apparatus including synchronizing signal separators and deflection generators.
  • the horizontal and vertical deflection generators are coupled conventionally to the deflecting yoke 54 for suitably varying its excitation to deflect the beam components to form a television raster.
  • the apparatus included in the synchronizing signal channel 45 also is employed to control the development of suitable voltages for impression upon the dynamic electron-optical system including the anode 55.
  • short voltage pulses at the vertical deflection frequency may be derived from the vertical deflection generator.
  • These vertical frequency pulses are impressed upon wave shaping apparatus 63.
  • This apparatus serves to develop a sawtooth wave and a wave having a substantially parabolic form, both having the vertical deflection frequency.
  • the vertical frequency sawtooth wave is coupled by a capacitor 64 to a vertical convergence control voltage generator 65.
  • the vertical frequency parabolic wave is coupled by a capacitor 66 to the vertical convergence control voltage generator 65.
  • This apparatus functions to combine the waves to produce a composite vertical frequency wave for impression upon the anode 55.
  • a horizontal frequency sawtooth wave is derived from the synchronizing signal channel 45 and is impressed upon a horizontal convergence control voltage generator 67 by means of a coupling capacitor 68. Also, a horizontal frequency parabolic wave is impressed upon the generator 67 by a coupling capacitor 69. A composite horizontal frequency wave is produced by the generator 67 for impression upon the anode 55.
  • the vertical frequency pulses may be derived from the output circuit of the vertical deflection generator.
  • the horizontal frequency sawtooth voltage may be obtained at the output circuit of the horizontal sawtooth oscillator.
  • the horizontal frequency parabolic wave conveniently may be derived from the storage capacitor of the damperbooster forming part of the horizontal deflection system.
  • a typical damper-booster of the type referred to is disclosed in an article by A. W. Friend titled Television Deflection Circuits, published at page 98 of the March 1947 RCA Review, vol. VIII, No. 1. sentative.
  • the outputs of the vertical and horizontal convergence control voltage generators and 67 respectively, are combined to produce a composite convergence control voltage which is impressed by means of a coupling capacitor 71 upon the anode 55.
  • the electric field produced by this anode varies, therefore, in accordance with both horizontal and vertical deflections of the electron beam components. Consequently, the beam components may be made to converge substantially at all points of the raster scanned in the plane of the masking electrode 53.
  • the wave-shaping apparatus 63 includes a resistive-capacitive network consisting of a series connection of resistors 72, 73 and 74 and a shunt capacitor 75 to ground from the junction point between resistors 72 and 73. This network is connected to thesynchronizing signal channel 45 for the impression thereon of voltage pulses by which thereis Figure 19 is reprewinding lllrcfsa transformer .113.
  • the wave-shaping apparatus 63 alsoeincludes a'resistivecapacitive-network consistingof a series connection of resistors 76-and 77and shunt capacitors 78 and 79 :connected toground substantiallyas .shown.
  • the input teriminal gofthis network is coupled to the synchronizing ,signal channel -45.
  • the output terminal of the network is coupled-by-a capacitor 81 to the control grid of an electron arnplifier tube 82.
  • A.- grid-leak resistor -83 is coupled from the control grid-to the junction point between resistors 84 and 85 connectedain series between athe'cathode -of the tube and ground.
  • the apparatus functions to prodncea substantially parabolic wave form at the.junctionpointbetween resistors-84 and 85 at the vertical deflection frequency.
  • ⁇ Iihe vertical'convergence control voltage generator 65 includes an input electron tube :86, to the control .grid of 'which theucoupling capacitor .64 is connected. :Also, this circuit is provided with a grid-leak resistor..87 con- ;nected between-the control grid and the junction point between-:a pairrof resistors .89 and '91 connected inseries .-betweenethe cathode of the tube 86zand.ground. .Space current for the input tube isprovided from a source indicated at +13, through a load resistor 92 connected -to 1116 anode: of the tube.
  • .-A;-b alanced output circuit is. provided .for the tube .86.
  • 'It comprises a series connection of substantially equal .resistors193 and 94 which arecoupled respectively by a .capac itor -95 .to theanode of the tube and a capacitor :9,6 to-t;he cathode of the tube.
  • the junction ;point between the output circuit resistors is -grounded.
  • the .terminaIs-oLtheoutput circuit resistors 93 and 94 are connected together by a potentiometer .97. By suitably ad- -justing the potentiometer :97, .the magnitude and polarity of the vertical sawtooth voltage may be varied.
  • the vertical convergence control voltage generator 65 also includes an output electron tube 98.
  • the ,control grid of the tube :98- is connected as .shown to the-po- :tentiome ter .97. In this manner acomponent .of the verticalsawtooth wave is impressed .upon the tube 98.
  • Thecontrol gridof this tube also is connected through-a resistor .99; to a variable point .011 a resistor .101 to which the .input coupling. capacitor,66.-isconnected.
  • .this means a .suitable component ;of the vparabolic .wave at the :vertical :defiecting frequency is impressed. upon the tube 9.8.
  • Theca'thodeof this tube includes aself-biasing network including a, resistor 10.2 and .a bypass capacitor 1.103. Space current for .the-tubeis supplied through a choke coil .104.
  • Thexoutput circuitof the tube 98 includes the primary winding 105 :of a transformer 7106. This winding is coupledatotheanode of thetube .98 by a capacitor 107.
  • the .transformer is provided with a secondary winding 108, .one terminal of which is connected :to the .ungrounded sterminal .ofthe primary winding .105 :and the otherterrninal :of;. which is connected to ,the horizontal voltage control generator 67.
  • the .-horizontal voltage generator 67 is substantially :similar in form to -the vertical. control generator 65.
  • Thezinput tube 109 of the horizontal control voltage generator:671 is coupledbetween the synchronizing signal channel A5 and an :outputelectron .tube 111.
  • This latter tube .alsozis connected to the synchronizing signal channel for Ethe suitable combination of the sawtooth .and parabolicwavestat..the horizontal deflecting frequency.
  • the output circuit of the tube 111 includesthe-primary This transformer also has .a secondary Winding 114 havingone terminal connected to the secondary .winding :108 of the-.... ⁇ gertical control voltage generator ,65.
  • the other .tegninal of..thc :windinglltl is coup1e d;by-. e capacitor 71 .to the dynamic -cotwer tnce controlanode. 55.
  • the 'yoke is energized-by energydenived from aw-rotating field-generator-IZZ.
  • the .energization :of the yokeg is suitable to produce va rotating fieldin the path- 0f the electron beamso :that: the beam is caused to continuously rotate about the axis of the :tube.
  • the -notatingfield generator 122- is controlled by suitable.;swnals.zdeiivedafromthe synchronizing signal channel iE0l;-6X1IQP1, the control signals for-the rotating field generator 122 may be they-horizontal syn- I chronizing apulses .xdBriYQ ai 3 m y c i ng si separator,
  • the deflectingyoke 21118:;is energizedin a conventional "manner by means of horizontal and yertical deflection generators I123. which are -synchronized in the :usual :man- .ner .by suitable connections .to the synchronizing-signal channel 'tS.
  • This coil may be conventionally energized from a suitable :Powepsuply indicated as ra battery 125.
  • the ply-1'25 and the coil 2124 serves tocontrol the magnitude of the coil .energization.
  • thedynamic-electron- :optical system comprising the .coil 127 i is energized v variably by an electriccurrent which varies .as afunctionof the horizontal andvertical deflection of theelectron beam components over the luminescent vscreenof the tube. .
  • the coil 127. is coupled *to a .control voltage generator 128.
  • Nerticah-and horizontal synchronizing pulses 'are impressed-upon the input circuit of magenqerator 128 -by means including capacitors 129 and .1-31.
  • the mean difference in the two modes of operation is in the derivation of the plurality of electron beam components by which the luminescent screens are excited.
  • the spinning action of the single electron beam provides such components at predetermined successive time intervals.
  • the rotating electron beam may be keyed so that it is effective only when it is coming from predetermined points from which it may approach the target electrode from desired angles.
  • the beam components are subject to the influence of the dynamic convergence coil 127 so that, irrespective of to which part of the target electrode they are deflected by the yoke 118, all components converge substantially at the same point.
  • control voltage generator 128 by which the dynamic convergence coil 127 is energized, are shown by way of example only.
  • the pulses derived from the synchronizing signal channel 45 at the vertical deflection frequency are impressed by capacitor 129 upon a resistive-capacitive network consisting of series resistors 132, 133 and 134 and shunt capacitors 13S and 136.
  • the output terminal of this network is coupled to the control grid 137 of a combining electron tube 138.
  • the cathode of this tube is connected to ground through a series arrangement of variable resistor 139 and fixed resistor 140.
  • the fixed resistor is bypassed by a capacitor 141.
  • the screen grid 142 is connected to a positive potential point +B through a resistor 143 and is bypassed to ground by a capacitor 144.
  • the pulses derived from the synchronizing signal channel 45 as the horizontal deflecting frequency are impressed by the capacitor 131 upon a grounded potentiometer 145.
  • these pulses Preferably, these pulses have parabolic wave forms. As previously described, they may be derived from the booster-damper storage capacitor.
  • the potentiometer 145 is coupled by a capacitor 146 to the control grid 137 of the tube 138.
  • a grid-leak resistor 147 also is provided.
  • Space current for the tube 138 is provided by means of the connection of the dynamic convergence coil 127 between the source of positive potential +8 and the anode of the tube.
  • the described apparatus forming the convergence control generator 128 functions to convert the pulses derived at horizontal and vertical deflection frequencies from the synchronizing signal channel 45 into a composite voltage for energizing the dynamic convergence coil 127.
  • the composite voltage is derived from the horizontal and vertical deflection voltage sources, it is seen that the energization of the coil 127 varies as a function of the deflection of the electron beam components over the target electrode of the kinescope 115.
  • This invention provides convergence of a plurality of electron beam components substantially at all points in the plane of a target electrode. This result is achieved even though the beam components emanate from different points spaced from the central or other longitudinal axis of a cathode ray tube. Electron beam components of this character are particularly useful in multi-color kinescopes for color television systems.
  • the electron beam components may be produced by a plurality of electron guns or by a single gun.
  • the electronic energy produced by the gun or guns may be continuous or pulsating.
  • deflection of the electron beam components to form a television or other raster at the target electrode may be either electromagnetic or electrostatic.
  • the dynamic convergence of the electron beam components may be either electromagnetic or electrostatic.
  • the deflection and dynamic convergence systems may both be of the same kind or not, as desired.
  • an electron beam-controlling system comprising, means for generating a plurality of mutually spaced electron beam components the effective points of origin of which being at different respective distances from substantially all points on said target electrode, a beam-deflecting system disposed in a region spaced from said target electrode, means for directing said electron beam components into said deflecting region in such a manner that they are differently affected by said beam-deflecting system, means for variably energizing said deflecting system to cause all of said beam components to scan a predetermined raster on said target electrode and an electron-optical system adjacent the paths of said beam components and energizable as a function of said beam deflection to maintain predetermined relative positions of said beam components at all points of said raster.
  • an electron beam-controlling system comprising, means for generating a plurality of mutually spaced electron beam components the effective points of origin of which being at different respective distances from substantially all point-s on said target electrode, a beam-deflecting system disposed in a region spaced from said target electrode, means for directing said electron beam components into said deflecting region in mutually spaced relationship, means for variably energizing said deflecting system to cause all of said beam components to scan a predetermined raster on said target electrode, an electron-optical system adjacent the paths of said beam components and energizable to maintain predetermined relative positions of said beam components at all points of said raster, and means for variably energizing said electron-optical system as a function of the variable energization of said deflecting system.
  • an electron beam-controlling system comprising a beam-deflecting system disposed in a region spaced from the plane of said target electrode, means for directing said electron beam components into said deflecting region at different angles, means producing horizontal and vertical beam-deflecting energy components for variably energizing said deflecting system to cause all of said angular beam components to scan a predetermined raster on said target electrode, an electronoptical system adjacent the paths of said beam components and energizable to converge all of said beam components at all points of said raster, means varying as a function of said horizontal beam-deflecting component for energizing said electron-optical system to control said beam components vertically, and means varying as a function of said vertical beam-deflecting component for additionally encrgizing said electron-optical system to control said beam components horizontally.
  • cathode ray tube also includes a plurality of electron guns for producing said respective electron beam components.
  • a color .kinescope ha-ving a luminescent screen including a multiplicity of groups of sub-elementaldi- 1 ,mensioned phosphor areas capable respectively of producing differently colored light when electronically excited, a
  • masking electrode disposed in spaced relationship to said luminescent screen, said masking electrode having an ,-ap erture for each of said groups of phosphor areas, means for developing and directing a plurality of electronabeam components toward said luminescent screen through .suc-
  • luminescent screen including a multiplicity of groups of subelemental dimensionedphosphor areas capable respectively of producing differently colored lighLwhenelectronically excited, a masking electrode disposed in spaced relationship to and substantially parallel to saidfluminescent screen, said masking electrode having ,anaperture for and in substantial register with each of said groups of phosphor areas, means for developing and directing electron beam components toward said luminescent screen maskingelectrode to selectively excite said different colorproducing ,phosphorareas, a beam-deflecting systemj dis- [posed in a region betweensaid beam-developingmeans and said masking electrode, means for variably energizing said deflecting system to cause all of said beam-components substantially concurrently to scan a predetermined raster at said masking electrode, an.electron-opticalsystem disposed adjacent the paths of said beam components be tween said beam-developing means and said deflecting System, and means for variablyenergizing said electronoptical system as a function of the
  • a color ,kinescope having a luminescentscreen including a multiplicity of groups of sub-elemental dimenfsioned phosphor areas capable respectively of pro jdu eing differently colored light when electronically .excitedQa masking electrode disposed in spaced relationship togsaid luminescent screen, said masking electrode having .an
  • aperture for each .of said groups of phosphor areas means including a plurality of electronguns respectively for fdeveloping and directing a pluralityof mutuallyispa'ced electron beam components toward said luminescent screen through successive apertures of said masking electrode sioned phosphor areas capable respectively of producing differently colored light'when electronically excited, a
  • variable electrongbeam deflection to converge ,allcof said beam components .at all points of the .rasternscanned at said masking electrode.
  • a color television irnagevreproducing system in- ,.cluding a cathode ray .tube. having :a. luminescentqscreen .of a type producing light; .of. the component colors of an image when impinged by electron beam .componentsuap- ,proaching it.from,,different..angles and deflected .to v scan .avraster at said, screen, ,apparatus forcontrolling the convergence .ofsaid beam.
  • components in a planeinthe vicinity of said..screen,.saidiapparatus comprising,,,means producing a ,plurality.
  • Electron beam-controlling system was defined in claim l4 wherein, said covergence controlmeans is coupled'to saidhorizontal beam deflection apparatus to .de- "rive energy at horizontal deflection frequency.
  • a cathode ray image-reproducing tube having ,a'luminescent screen of .a character to producelight of component colors of an image when impinged by electron beam components, and means for producing a plurality, of electron beam components respectively having difler- .ent characteristics; deflection apparatus, for angularly idefleeting saidplurality of heamcomponentsto scana raster of predetermined configuration on said;screen; the respective characteristics and mutual relationship imposition of said 'screen and said "electron "beam producing means being such that the positional relationships of said beam components 'at said screen are notconstant at all "points 'o'f'said 'scanned'raster; means located adjacent thepaths of said plurality of beam cornponentsand'energizable-to produce a desired positional relationship of said .beam components at;said screen; andscmeans .for'energizingzone '
  • a cathode ray image-reproducing tube having a luminescent screen of a character to produce light of component colors of an image when impinged by electron beam components, and means for producing a plurality of electron beam components respectively having different characteristics; means for angularly deflecting said plurality of beam components to scan a raster of predetermined configuration on said screen; the respective characteristics and mutual relationship in position of said screen and said electron beam producing means being such that the positional relationship of said beam components at said screen are not constant at all points of said scanned raster; means located adjacent the paths of said plurality of beam components and energizable to produce a desired positional relationship of said beam components at said screen; and means for energizing said last-named means as a function of said beam deflection angle in such a manner as to maintain said desired positional relationship of said beam components at said screen at all points of said scanned raster.
  • a cathode ray image-reproducing tube having a luminescent screen of a character to produce light of component colors of an image when impinged by electron beam components, means for producing a plurality of electron beam components respectively having difierent characteristics, and means for focussing said individual beam components substantially at said luminescent screen; means for angularly deflecting said plurality of beam components to scan a raster of predetermined configuration on said screen; the respective characteristics and mutual relationship in position of said screen and said electron beam producing means being such that the positional relationship of said beam components at said screen are not constant at all points of said scanned raster; and electron-optical means located adjacent the paths of said plurality of beam components and having an effect upon said beam components which varies as a function of said beam deflection angle in such a manner as to maintain said desired positional relationship of said beam components at said screen at all points of said scanned raster.
  • a cathode ray image-reproducing tube having a luminescent screen of a character to produce light of component colors of an image when impinged by electron beam components, and means for producing a plurality of mutually spaced electron beam components the effective points of origin of which being at different respective distances from substantially all points on said luminescent screen; means located between said effectwo points of beam component origin and said screen for angularly deflecting said plurality of beam components to scan a raster of predetermined configuration on said screen; and electron-optical means located adjacent the paths of said plurality of beam components in a region between said eifective points of beam component origin and said screen and having a directing effect upon said beam components which varies as a function of said beam deflection angle in such a manner as to produce a desired reduced mutual spacing of said beam components at all points of said scanned raster.
  • a cathode ray image-reproducing tube having a luminescent screen of a character to produce light of component colors of an image when impinged by electron beam components, and means for producing a plurality of mutually spaced electron beam components the effective points of origin of which being at different respective distances from substantially all points on said luminescent screen; means including field producing apparatus having beam entrance and beam exit portions for deflecting said plurality of beam components to scan a raster of predetermined configuration on said screen; and electron-optical means located between said effective points of beam component origin and the beam exit portion of said deflecting field producing apparatus and having a directing effect upon said beam components which varies with said beam deflection in such a manner as to effectively eliminate the mutual spacing of said beam components at all points of said scanned raster.
  • a cathode ray tube image-reproducing system including: means for generating a plurality of electron beam components; a target electrode; deflection apparatus for angularly deflecting said beam components in a manner to cause them to scan a raster of predetermined configuration on said target electrode; said beam component generating means and said target electrode having such respective characteristics and being so related in position to one another that normally the positional relationships of said electron beam components at said target electrode are not constant at all points of said raster; means located adjacent the paths of said plurality of beam components and energizable to produce a desired positional relationship of said beam components at said target electrode; and means deriving energy from said deflection apparatus for energizing said last-named means as a function of said beam deflection angle in such a manner as to maintain said desired positional relationship of said beam components at said target electrode at all points of said scanned raster.
  • a cathode ray image-reproducing tube having a luminescent screen of a character to produce light of component colors of an image when impinged by electron beam components, and means for producing a plurality of mutually spaced electron beam components the effective points of origin of which being at difierent respective distances from substantially all points on said luminescent screen; horizontal and vertical deflection apparatus for angularly deflecting said beam components both horizontally and vertically to scan a raster of predetermined configuration on said screen; electron-optical means located adjacent the paths of said electron beam components and energizable to have a directing eifect upon said beam components so as to produce a desired positional relationship of said beam components at said screen; and means deriving energy from said horizontal deflection apparatus for energizing said electron-optical means as a function of said horizontal beam deflection angle in such a manner as to maintain said desired positional relationship of said beam components at said screen at all points of said
  • a cathode ray image-reproducing tube having a luminescent screen of a character to produce light of component colors of an image when impinged by electron beam components, and means for producing a plurality of mutually spaced electron beam components the effective points of origin of which being at different respective distances from substantially all points on said luminescent screen; horizontal and vertical deflection apparatus for angularly deflecting said beam components both horizontally and vertically to scan a raster of predetermined configuration on said screen; electron-optical means located adjacent the paths of said electron beam components and energizable to have a directing effect upon said beam components so as to produce a desired positional relationship of said beam components at said screen; and means deriving energy from said horizontal and vertical deflection apparatus for energizing said electron-optical means as respective functions of said horizontal and vertical beam deflection angles in such a manncr as to maintain said desired positional relationship of References Cited in the file of this patent UNI

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
US164444A 1950-05-26 1950-05-26 Electron beam controlling system Expired - Lifetime US2751519A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE503462D BE503462A (d) 1950-05-26
US164444A US2751519A (en) 1950-05-26 1950-05-26 Electron beam controlling system
ES0197847A ES197847A1 (es) 1950-05-26 1951-05-11 UN MONTAJE DE CONTROL DE RAYOS ELECTRoNICOS
FR1041824D FR1041824A (fr) 1950-05-26 1951-05-22 Système de commande du faisceau d'électrons de tubes à rayon cathodique
GB11977/51A GB690155A (en) 1950-05-26 1951-05-22 Electron beam controlling system
CH315443D CH315443A (de) 1950-05-26 1951-05-24 Steuereinrichtung für den Elektronenstrahl einer Kathodenstrahlröhre
DER6021A DE972941C (de) 1950-05-26 1951-05-26 Strahlsteuereinrichtung fuer eine Kathodenstrahlroehre, insbesondere eine Farbfernseh-Wiedergaberoehre

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US164444A US2751519A (en) 1950-05-26 1950-05-26 Electron beam controlling system

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US164444A Expired - Lifetime US2751519A (en) 1950-05-26 1950-05-26 Electron beam controlling system

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BE (1) BE503462A (d)
CH (1) CH315443A (d)
DE (1) DE972941C (d)
ES (1) ES197847A1 (d)
FR (1) FR1041824A (d)
GB (1) GB690155A (d)

Cited By (4)

* Cited by examiner, † Cited by third party
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US2849646A (en) * 1953-02-24 1958-08-26 Rauland Corp Color convergence system
US2880363A (en) * 1955-10-24 1959-03-31 Motorola Inc Color television receiver
US2880359A (en) * 1953-09-14 1959-03-31 Motorola Inc Color television receiver
US2945157A (en) * 1957-12-11 1960-07-12 Philips Corp Picture tubes for three-colour television systems comprising deflection coils

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2880358A (en) * 1952-04-08 1959-03-31 Motorola Inc Color television system
US2759121A (en) * 1953-08-10 1956-08-14 Motorola Inc Television receiver
US2749473A (en) * 1953-11-20 1956-06-05 Rca Corp Beam convergence system for tri-color kinescope
US3638064A (en) * 1968-06-15 1972-01-25 Sony Corp Convergence deflection system for a color picture tube

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US261333A (en) * 1882-07-18 Wagon-brake
US2123011A (en) * 1935-03-19 1938-07-05 Emi Ltd Electron discharge apparatus
US2140284A (en) * 1931-07-14 1938-12-13 Farnsworth Television Inc Projecting oscillight
US2224587A (en) * 1936-07-13 1940-12-10 Firm Of Fernseh Aktien Ges Method of operating cathode ray tubes
FR866065A (fr) * 1938-07-11 1941-06-16 Fernseh Ag Procédé de télévision en couleurs
US2449524A (en) * 1944-11-27 1948-09-14 Us Sec War Oscilloscope device
US2572858A (en) * 1947-06-03 1951-10-30 Sylvania Electric Prod Electron optical system
US2579705A (en) * 1950-01-27 1951-12-25 Rca Corp Color television system
US2579665A (en) * 1950-04-29 1951-12-25 Rca Corp Color-kinescopes, etc.
US2595548A (en) * 1947-02-24 1952-05-06 Rca Corp Picture reproducing apparatus

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AT146440B (de) * 1934-11-29 1936-07-10 Walter Dr Rogowski Verfahren zum Betriebe Braunscher oder ähnlicher mit Elektronenstrahlen arbeitender Röhren.
GB463896A (en) * 1936-02-28 1937-04-08 Television Lab Ltd Improvements in or relating to oscillights or cathode ray tubes

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Publication number Priority date Publication date Assignee Title
US261333A (en) * 1882-07-18 Wagon-brake
US2140284A (en) * 1931-07-14 1938-12-13 Farnsworth Television Inc Projecting oscillight
US2123011A (en) * 1935-03-19 1938-07-05 Emi Ltd Electron discharge apparatus
US2224587A (en) * 1936-07-13 1940-12-10 Firm Of Fernseh Aktien Ges Method of operating cathode ray tubes
FR866065A (fr) * 1938-07-11 1941-06-16 Fernseh Ag Procédé de télévision en couleurs
US2449524A (en) * 1944-11-27 1948-09-14 Us Sec War Oscilloscope device
US2595548A (en) * 1947-02-24 1952-05-06 Rca Corp Picture reproducing apparatus
US2572858A (en) * 1947-06-03 1951-10-30 Sylvania Electric Prod Electron optical system
US2579705A (en) * 1950-01-27 1951-12-25 Rca Corp Color television system
US2579665A (en) * 1950-04-29 1951-12-25 Rca Corp Color-kinescopes, etc.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849646A (en) * 1953-02-24 1958-08-26 Rauland Corp Color convergence system
US2880359A (en) * 1953-09-14 1959-03-31 Motorola Inc Color television receiver
US2880363A (en) * 1955-10-24 1959-03-31 Motorola Inc Color television receiver
US2945157A (en) * 1957-12-11 1960-07-12 Philips Corp Picture tubes for three-colour television systems comprising deflection coils

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DE972941C (de) 1959-11-05
FR1041824A (fr) 1953-10-27
ES197847A1 (es) 1953-07-16
GB690155A (en) 1953-04-15
CH315443A (de) 1956-08-15
BE503462A (d)

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