US2842697A - Beam-intercepting structure for cathode ray tube - Google Patents

Beam-intercepting structure for cathode ray tube Download PDF

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Publication number
US2842697A
US2842697A US551648A US55164855A US2842697A US 2842697 A US2842697 A US 2842697A US 551648 A US551648 A US 551648A US 55164855 A US55164855 A US 55164855A US 2842697 A US2842697 A US 2842697A
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phosphor
strips
opaque
elements
deposited
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Frank J Bingley
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Space Systems Loral LLC
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Philco Ford Corp
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Priority to NL212758D priority Critical patent/NL212758A/xx
Application filed by Philco Ford Corp filed Critical Philco Ford Corp
Priority to US551648A priority patent/US2842697A/en
Priority to FR1162743D priority patent/FR1162743A/fr
Priority to CH345665D priority patent/CH345665A/fr
Priority to GB37472/56A priority patent/GB857451A/en
Priority to DEP17551A priority patent/DE1059028B/de
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Publication of US2842697A publication Critical patent/US2842697A/en
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    • 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
    • H01J29/327—Black matrix materials
    • 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
    • H01J29/185—Luminescent screens measures against halo-phenomena
    • 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
    • H01J29/02—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
    • H01J29/34—Luminescent screens provided with permanent marks or references
    • 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
    • H01J31/26—Image pick-up tubes having an input of visible light and electric output
    • H01J31/46—Tubes in which electrical output represents both intensity and colour of image
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
    • 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
    • H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
    • H04N9/24—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position

Definitions

  • ' m'ay be impinged upon by the beam not only during the intervals when the beam is modulated in intensity by signals corresponding to the red color of the scanned element of the televised scene, but also during intervals when it is modulated by blue or green representative signals.
  • the'scanning beam spot size may be made larger, provided, of course, that it is not wider than the total width ofa phosphor strip and the spaces adjacent it on either side.
  • the use of. larger beam spots also tends to simplify display tube construction and reduce the costs thereof.
  • An electron-permeable, light-reflecting, and electrically conductive material is often deposited on the rear (facing the electron-gun) surface of the phosphor strips in order to increase further the brightness of a screen so constructed.
  • This layer increases the brightness of the reproduced image by reflecting back toward the viewer light initially emitted from the fluorescent beam fspot toward the rear of the tube. It also assistsin preventing damage caused by the impact on the phosphor screen of ions which have a much greatermass. than the electrons. It is also of use in establishing a desired potential on the rear surface of the phosphor strips.
  • the light-reflecting layer While the addition of the light-reflecting layer increases brightness, it also introduces some unwantedeffects. In addition to reflecting toward the viewer light from the spot emitted in a backward direction, it unfortunately also reflects backto the observer ambientlight striking it. For example, if there is a source of illumination in the viewing area, some of its rays will fall on the portions of the light reflecting layer situated in the spacesbetween the phosphor strips and a mirror image of-the source can be seen by the viewer. If daylight enters the viewing area the colored image will be 'somewhat obscured by. the
  • the light from the red phosphor strip for example, will be reflected bythe "front internal surface of the glass faceplate. of the tube back toward phosphor strips emissive of green and blue light, thereby causing the latter colors to be desaturated.
  • Halation may also cause fuzziness in the reproduction of sharp transitions from one color to another in the reproduced image.
  • Another object of the invention is to provide a screen structure'for improving the color fidelity of images reproduced by certain types of color television display tubes
  • the :sets 'of phosphor strips are frequent' ly 'depositedupon the inner surface of the faceplate of the cathode ray tube by photographic means.
  • the phosphor strips were laid down on the inner surface of the faceplate so that the width :of each strip was essentially uniformthroughout its entire length.
  • the attainment of this objective is difiicult because the particles of the respective phosphor "materials used for the strips. have different average. 7 I
  • the strips of phosphor materialswhose'pa'rti'cles are relatively large generally have edges whose contour 'is' characterized by large variations, whereas the strips cient phosphors such as the red phosphor.
  • Another object of the invention is to overcome the adverse effects of misplaced phosphor particles on the color quality of the reproduced image.
  • Still another object of the invention is to simplify the fabrication of such screens by reducing the precision required in depositing the strips in successive steps.
  • cathode ray tubes of the type described it is customary to decrease the efficiencies of the naturally more eificient phosphor materials emissive of green and blue light, for example, so as to equalize the light output therefrom with respect to the light output from the less efficedure naturally results in a reduced efiiciency of light output with respect to electrical input to the display tube for a given area of phosphor material.
  • Another object of the invention to preserve the advantages of using phosphors which are naturally more eflicient while compensating for the phosphors which are less eflicient in order to achieve greater image brightness and proper color balance.
  • an improved beam-intercepting structure for cathode ray tubes of the type described in which a plurality of substantially opaque and non-reflecting guard elements are deposited in a predetermined pattern on an appropriate transparent substrate and a plurality of electron-sensitive elements are deposited in a predetermined pattern in the spaces between the opaque and non-reflecting elements.
  • a plurality of opaque, nonrefiecting and elongated elements are deposited on a transparent substrate in a definite pattern and a plurality of elongated phosphor elements which emit light of selected colors in response to electrons impingent thereupon are deposited in the spaces between, and in contact with, the adjacent opaque elements.
  • the phosphor elements are so deposited that they overlap on the rear surfaces of the opaque elements. This helps to insure th t the spaces between the guard elements are completely This profilled by the phosphor elements, yet permits the latter to be deposited with less precision than has heretofore been customary.
  • the. disparities in the etficiencies of the phosphor materials of the several sets of phosphor strips are equalized by making the widths of the strips of each set vary inversely with the relative efficiency of the phosphor material of which it is composed.
  • the width of a relatively inefficient phosphor strip such as the red emissive strip for example, is made large with respect to the width of a relatively efiicient phosphor strip such as the green emissive strip.
  • the center-to-center distance between any two adjacent phosphor strips regardless of their width, may be made equal. In some cases, however, it may be desirable to vary the center-to-center distance between adjacent phosphor strips because of other considerations which are not pertinent to the present invention.
  • an effective method for expediting the production of improved screen structures with a concomitant relaxation of some of the manufacturing tolerances required therein.
  • This system involves the process of first depositing the opaque and non-reflective elements on one surface of an appropriate transparent substrate, and next depositing each of the sets of phosphor strips in turn in the spaces between the opaque strips. Even if each deposited phosphor strip overlaps somewhat on the rear surfaces of the adjacent opaque strips because it is wider than the space therefor, there is no loss of uniformity of the visible width of the phosphor strips or loss of color purity since the opaque strips block light from those portions of the phosphor strips which do overlap and prevent it from reaching the viewer. Thus the phosphor strip deposition process can be performed with less precision than heretofore has been required.
  • the particle sizes of the various phosphors employed are relatively large and thus the edges of the phosphor strips have contours which are subject to rather large variations.
  • the particle size of the material of which the opaque guard strips are constituted is very line in comparison with the particle size of the phosphors. If the guard strips are laid down first, and the phosphor strips next, it is the edges of the guard strips which define the visible edges of the phosphor strips contiguous therewith. Since the material of the guard strips is very fine, their edges have contours which are marked by relatively small variations so that the width of each one can be made very uniform.
  • the visible edges of the phosphor strips defined thereby have contours marked by relatively small variations, and the visible or efiective width of each of the phosphor strips is rendered more uniform so that light emitted therefrom is confined with greater precision than has hitherto been possible.
  • Figure l is a sectional perspective view of one form of beam-intercepting structure in accordance with my invention.
  • Figure 2 is a sectional plan view of the structure shown in Figure l;
  • Figure 3' is a sectional plan View of another form of screen structure in accordance withthe invention.
  • a beam-intercepting structure for a cathode ray tube used to reproduce images of televised scenes in color is' shown.
  • It consists of a transparent substrate 20 which may be the faceplate of the cathode ray tube, for example, or an essentially planar transparent membe'r mounted in proximity thereto.
  • a conventional electron-1'5errheable andlightreflecting layer 26 is deposited onv the rear surface of the strips 21, 22 and 23 and the strips 27 .
  • This layer 26, which may be of aluminum for example, increases the bright- ,ness of the' rfepr6duced ifriage by; reflecting-toward the "observer those rays of light' e itted in the direction of the electron un from the po t'where the electron beam impinges on the phosiphor' strips.
  • iiidexin strips 28 may be deposited which may be composedof a material such as MgO, for example, which hash secondary emission ratio different from that of the layer26, or may be composed of a light emissivephosphor. Indexing signals in the form of a secondary electrori current or light variation's, as the ease may be, are generated in re'sponseto: the scanning of the-electron beam thereupon.
  • Fig. 2 also depicts 'how the opaque strips 27 serve to reduce the amount of hal-ation caused by the impingefment of ambient light on' the novel screen.
  • Another ray 30' of'ambi'en't light is'reflected from a point 31 adjacent one of" th'e blue color emissive strips 26in response to the ray '30 incident thereuponxontothe front internal i surface 3.5: of; the faceplate 20' whence part ss' of-it is" T able .ayerZ causing that por'tion of theblue emissive strip 22 through which it passes to emit light of thatv once again reflected back onto one of the stiips' 27 where it is absorbed. Were it not for the presence of the latter strip 27, it would be reflected once again toward the observer by the reflective coating 26.
  • Figure 3 illustrates another form of the invention in which the opaque strips 27 intermediate the phosphor strips are of varying width thus masking ofI' part of the phosphor strips from the view of the observer and cansing the visible width of the several phosphor strips to differ.
  • These diiierences are introduced for the express purpose of compensating for the diflerences in the efiiciencies of the various phosphors employed.
  • the opaque strips may be uniformly wide and the P1108? phor strips may be of different widths, or both the opaque strips and the phosphor strips may-be of difiierent Widths.
  • the opaque strips 27' and the phosphor strips 21', 22', and 23 both have different widths.
  • the widths of the opaque strips optionally may be selected so as to achieve asubstantially uniform center-to-center spacing at between any two adjacent phosphor strips so that the beam intensity may be modulated at a single frequency.
  • the distance x may be made equal to the corresponding distance y of Fig. 2. If the center-to-center distance between the phosphor strips is made to vary the beam intensity would be modulated by a signal wave having a complex frequency.
  • the width of the respective phosphor strips may be adjusted arbitrarily to over-emphasize one or more. of the colors of the reproduced image or display. 7 a
  • the phosphor strips are located not just between the opaque elements 27' but may also overlap them to some extent on their rear surfaces. While the deposition of the phosphor strips in the manner shown in Fig. 3 may appear somewhat wasteful of phosphor material, this possible disadvantage is greatly outweighed by the resultant simplification in the process of manufacturing such structures and the considerable improvement in screen structures provided thereby, which makes possible the reproduction of superior colored images.
  • each set of phosphor strips was deposited upon the substrate 20 by the use of photographic techniques involving the projection of a grill of vertical lines onto a layer of a photo-sensitive material deposited on the inner surface of the faceplate of such a tube. After exposure the photo-sensitive layer was covered with one of the phosphor materials and then the inner surface of the faceplate was washed. Those portions of the photosensitive layer which had been exposed to light became hardened and the phosphor material adhered closely there to, whereas the unexposed portions remained relatively soft so that they, and the particles of the phosphor material deposited thereupon, were washed away. This process is explained in more detail in the co-pending application of P. D. Payne, Jr., Serial No. 376,345, filed August 25, 1953. a
  • the other sets of phosphor strips were deposited in a similar manner, i. e., other grills for the respective sets of phosphor strips were projected upon photo-sensitive materials on the screen and the phosphor materials were deposited in the same fashion.
  • the grills had to be precisely placed so as to fulfill the requirements of extremely precise spacing between the strips to yield a tube capable of reproducing good color images.
  • the beamintercepting structure of such tubes are preferably made by first depositing the opaque elements on the substrate, and then depositing thereupon the electron sensitive phosphor elements whose edges visible to the viewer are defined by the edges of the opaque elements.
  • This has several advantages over former methods, among which are: (l) the positioning of the respective grills after the deposition of each set of phosphor strips is not so critical since, if the phosphor strips are not displaced from one another exactly as specified, they will overlap on the backs of the adjacent opaque elements to a certain extent. tions that do overlap will not be visible to the observer; (2) the visible width of the phosphor strips may be made more uniform.
  • the opaque strips may be composed of particles Which are much finer and more nearly homogeneous than those of available phosphor strips. Therefore the edges or" the opaque strips may have a contour subject to only small variations.
  • the visible edges of the phosphor strips are defined by the more invariant edges of the opaque strips and the effective widths of the phosphor strips are thereby made more uniform, (3) the possibility that some of the phosphors deposited in subsequent processing steps may become lodged in the spaces between adjacent phosphor strips, causing color contamination, is eliminated since the opaque elements are deposited first.
  • a photo-sensitive material comprising, for example, water, polyvinyl alcohol, and a denatured alcohol such as that designated by the trademark Solox manufactured by the Industrial Solvents Division of the Union Carbide and Chemical Company.
  • the invention is also applicable to other forms of display devices for the production of images in color.
  • it is applicable to the conventional socalled aperture mask type of color television display tube which comprises a screen containing a plurality of sets of phosphor dots emissive of light in selected colors, said dots being arranged in a number of triads, i.
  • a tube of the aperture mask type constructed accordingto the; present; invention can be made in the following; way, First, an opaque and non-reflective material is deposited; on an, appropriatesubstrate, such asthe inner surface of the faceplate of the tube, or on a separate Bl'slllltfiubstrate, in a pattern corresponding to the intersti cesbetween thephosphor does of the completed screen, Second, the respective sets of phosphor dots are deposited inthe spaces in the deposited. pattern of opaque ma ri l.
  • One way is to project the image of the aperture mask to be-v built into a particular tube,
  • the entire screen is washed with water and the exposed portions of'thephoto-sensitive material, on which, rest the particles of the opaque oxide material, are Washedy V
  • Alternatively-one can project the image of a negative mask; that is one which is; opaque where theprojected phosphor dots are to fall andwhich is transparent where the interstices between the phosphor dots are to be lgc ed.
  • This photo-sensitive material maybe the same as: the one. used in the manufacture of;screenssuchasshown ;-in.-Fig. 1, ashaspreviously been explained.-
  • the sets of phosphor dots may then be, deposited in successivestepsas has been: heretofore customary in thenmanufacture, of, such tubes.
  • phos-- phor v dots were laid. downby means of appropriate silk screenprocessesior by-purely photographic processes) inwhich asilk-screen mask. (or its photographicv equiv V alent) is rotated clockwise by approximately 120- after the nfirst set of; dots, :is laid down and. the second; set of '10 dots is deposited. The mask is then rotated 120 counter clockwise with respect to its first position and thethird set of dots is deposited.
  • the opaque pattern is deposited first it is not necessary that the-phosphors dots actually deposited have exactly circular contours or that they have a configuration which is congruous with ,the spaces in the pattern of opaque areas which has been previously deposited.
  • the phosphor dots may be slightly larger than the spaces in the opaque patternyin fact they may overlap onto the rear surface of the pattfcrn' of opaque areas provided that the overlap is not-so great that the phosphor dotmaterial falls into 'a space in'the pattern to which a phosphor dot emissive of a different color is to be located.
  • the pattern of opaque material masks the actual pattern of phosphor dots from the viewer, those portions of the phosphor dots. which are not properly alignedbbeing blocked from sight by the opaquematerial.
  • an' electron-permeable and light-reflecting layer may be deposited on the rear surfacesof the phosphor strips and of the opaque areas to enhance the brightness of the'reproduced image. "It is evident that then. the pattern of opaque material will preventambient light from being reflected back into the eyes of the viewer from those portions of the light-reflecting layer which would. normally be located in the interstices-be tween adjacent phosphor dots.
  • page 309 may also profit by embodying the principles of my invention as explained herein.
  • An electron beam-intercepting structure for a: cathode raytube comprisingzza plurality of electron-sensitive elements arranged in: a regular pattern; and a substantially opaque and non-reflecting material. disposed be-' tween-saidielements. r
  • 2.1-An electron beam-intercepting structure' for' a cathode ray tube comprising: a plurality of electron-sensitive elements; arranged in a-regular pattern, and a plurality of substantially opaque and non-reflecting elements disposed infacregular pattern" in the interstices between said electron-sensitive elements.
  • Anelectron beam-intercepting structure for a cathode ray. tube: comprising: a plurality of phosphor elements arrangedlirr a-predetermined pattern, and a plurality'of substantially opaque and non-reflecting elements disposed in apredetermined pattern in the. interstices between said phosphor elements, each of, said opaquelelephosphortelements.
  • An electron beam-intercepting structure for a cathode ray tube comprising: a plurality of electron sensitive elements disposed on a substrate in a predetermined pattern, said elements being emissive of light in response to the impingement of electrons thereupon, and a plurality of substantially opaque and non-reflecting elements disposed in a predetermined pattern in the interstices between said electron-sensitive elements, said non-reflecting elements also being disposed in contiguity to said electronsensitive elements.
  • An electron beam-intercepting structure for a cathode ray tube comprising: a plurality of sets of phosphor elements arranged in a predetermined pattern, each of said sets being emissive of light of a different selected color in response to the impingement of electrons thereupon, and a substantially non-reflecting material intermediate said electron sensitive elements.
  • An electron beam-intercepting structure for a cathode ray tube comprising: a substrate of an essentially transparent material, a plurality of phosphor elements disposed on said substrate in a predetermined pattern, said sets of elements being respectively emissive of light of different selected colors in response to the impingement of electrons thereupon, and a plurality of substantially opaque and non-reflecting elements, each of said opaque elements being disposed intermediate two adjacent ones of said electron sensitive elements.
  • An electron beam-bearing intercepting structure for a cathode ray tube comprising: a plurality of phosphor elements which are emissive of light in response to the impingement of electrons thereupon, a substantially opaque and non-reflecting material intermediate said phosphor elements, and a layer of reflecting material in contact with said phosphor elements and with said opaque elements.
  • An electron beam-intercepting structure for a cathode ray tube comprising: a substrate of an essentially transparent and non-conductive material, a plurality of phosphor elements disposed in a predetermined pattern and in contact with said substrate, said phosphor elements being emissive of light in response to the impingement of electrons thereupon, a plurality of substantially opaque and non-reflecting elements disposed intermediate said phosphor elements and in contact with said substrate, and a layer of a reflecting material disposed in contact with said phosphor and opaque elements.
  • An electron beam-intercepting structure for a cathode ray tube comprising: a plurality of sets of elongated phosphor elements disposed in a predetermined pattern, each of said sets being emissive of light of a different selected color in response to the impingement of electrons thereupon, and a plurality of elongated and substantially non-reflecting elements disposed intermediate said phosphor elements.
  • a beam-intercepting structure for a cathode ray tube for reproducing colored images comprising: a plurality of sets of phosphor strips disposed in a predetermined pattern in contact with the inner surface of the faceplate of said cathode ray tube, said sets of phosphors being respectively emissive of light in selected colors in response to the impingement of electrons thereupon, a plurality of substantially opaque and non-reflecting strips, each of said opaque strips being disposed intermediate two adjacent ones of said phosphor strips and in contact 12 therewith, and a layer of a reflecting material disposed in contact with said phosphor strips and said opaque strips.
  • a method for constructing a beam-intercepting structure for a cathode ray tube comprising the steps of: depositing a substantially opaque material in a predetermined pattern on a substrate, said deposited pattern including a plurality of interstices, and depositing an electron-sensitive material in said interstices.
  • a method ofv constructing a beam-intercepting structure for a cathode ray tube comprising the steps of: depositing a substantially opaque and non-reflective material in a predetermined pattern on a substrate, said deposited pattern including a plurality of interstices, and depositing a plurality of different phosphor materials in said interstices so that said phosphor materials overlap the rear surface of said opaque material.
  • a method ofmaking a beam-intercepting structure for a cathode ray tube comprising the steps of: depositing a substantially opaque and non-reflective material so that the front surface thereof makes contact with a substrate, said opaque material being deposited in a predetermined pattern having a plurality of interstices therein, depositing a plurality of sets of elements composed of, respectively different electron-sensitive phosphors on the portions of said substrate exposed by said interstices, each of said elements being so deposited as to have a surface which makes contact with a region of the rear surface of said opaque material lying near each of said interstices, and depositing a light-reflecting material on said rear surface of said opaque material and on the rear surfaces of said phosphor elements.
  • 'A beam-intercepting structure for a cathode ray tube comprising: a substantially opaque and non-reflective material deposited in a regular pattern on a substrate, said pattern including a plurality of interstices, and a plurality of different phosphor materials deposited in said interstices so that said phosphor materials overlap the rear surface of said opaque material.
  • a beam-intercepting structure for a cathode ray tube comprising: a plurality of strips of a substantially opaque and non-reflective material deposited in a regular pattern on a substrate, said pattern including a plurality of intersticesfand a plurality of strips composed of respeetivelydifferent electron-sensitive phosphors on the portions of said substrate exposed by said interstices, each of said strips being so deposited as to make contact with a region of the rear surfaces of said opaque strips near each of said interstices.
  • An electron beam-intercepting structure for a cathode ray tube comprising a plurality of mutually spaced strips of opaque material deposited on a substrate and different phosphor material deposited in the spaces between said strips, said spaces having Widths which are a function of the respective efiiciencies of the phosphor materials deposited therein.
  • An electron beam-intercepting structure for .a cathode ray' tube comprising a plurality of mutually spaced strips of opaque material deposited on a substrate, and phosphor materials deposited in the spaces between said strips, the phosphor material deposited in certain of said spaces having an efliciency differing from that of those deposited in others of said spaces, the spaces occupied by phosphor material of lower efliciency being wider than those occupied by phosphor material of higher efiiciency.
  • a beam-intercepting structure for a cathode ray tube comprising: a substantially opaque and non-reflective material deposited in a regularpattern on a sub- .strate, said pattern including a plurality of interstices,
  • a beam-intercepting structure for a cathode ray tube comprising: a substantially opaque and non-reflective material havingparticles of a given size'deposited in a regular pattern on a substrate, said pattern having a plurality of interstices, and a plurality of sets of phosphor elements deposited in said interstices, said sets of phosphor elements having respective particle sizes sub-f st-antially larger than said given size.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
US551648A 1955-12-07 1955-12-07 Beam-intercepting structure for cathode ray tube Expired - Lifetime US2842697A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL212758D NL212758A (el) 1955-12-07
US551648A US2842697A (en) 1955-12-07 1955-12-07 Beam-intercepting structure for cathode ray tube
FR1162743D FR1162743A (fr) 1955-12-07 1956-10-31 écrans perfectionnés pour tubes à rayons cathodiques
CH345665D CH345665A (fr) 1955-12-07 1956-12-07 Ecran lumineux pour tube à rayon cathodique et procédé de fabrication de cet écran
GB37472/56A GB857451A (en) 1955-12-07 1956-12-07 Improvements in and relating to image-reproducing cathode ray tube apparatus
DEP17551A DE1059028B (de) 1955-12-07 1956-12-07 Elektronenstrahl-Auffangvorrichtung fuer Kathodenstrahlroehren und Verfahren zu ihrer Herstellung

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US551648A US2842697A (en) 1955-12-07 1955-12-07 Beam-intercepting structure for cathode ray tube

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US2842697A true US2842697A (en) 1958-07-08

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US (1) US2842697A (el)
CH (1) CH345665A (el)
DE (1) DE1059028B (el)
FR (1) FR1162743A (el)
GB (1) GB857451A (el)
NL (1) NL212758A (el)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941030A (en) * 1954-12-17 1960-06-14 Charles A Birch-Field Color television apparatus
US2985784A (en) * 1958-08-18 1961-05-23 American Optical Corp Optical image-forming devices
US3005125A (en) * 1957-12-05 1961-10-17 Sylvania Electric Prod Display screen
US3223872A (en) * 1962-08-13 1965-12-14 Paramount Pictures Corp Color screen with electron- and lightabsorptive material separating adjacent color strips
US3779760A (en) * 1972-10-02 1973-12-18 Sony Corp Method of producing a striped cathode ray tube screen
US3889145A (en) * 1972-08-30 1975-06-10 Tokyo Shibaura Electric Co Color cathode ray tube with phosphor strips concave toward vertical center line
US3952225A (en) * 1970-02-24 1976-04-20 Zenith Radio Corporation Cathode-ray tube having phosphor screen interposed between composite mesh and reflective layer
US3979630A (en) * 1971-08-02 1976-09-07 Rca Corporation Shadow mask color picture tube having non-reflective material between elongated phosphor areas and positive tolerance
DE2617684A1 (de) 1975-04-23 1976-11-04 Rca Corp Druckverfahren fuer die herstellung einer photomaske
US4023063A (en) * 1973-04-19 1977-05-10 U.S. Philips Corporation Color tube having channel electron multiplier and screen pattern of concentric areas luminescent in different colors
US4070596A (en) * 1971-08-27 1978-01-24 Tokyo Shibaura Electric Co., Ltd. In-line plural beams cathode ray tube having color phosphor element strips spaced from each other by intervening light absorbing areas and slit-shaped aperture mask
US4406971A (en) * 1976-04-20 1983-09-27 Mitsubishi Denki Kabushiki Kaisha Color cathode ray tube having a reference white fluorescent screen
US4757231A (en) * 1985-09-12 1988-07-12 Sony Corporation Beam-index type color cathode ray tube device
CN101937821A (zh) * 2010-03-30 2011-01-05 中山大学 真空设备荧光屏及该荧光屏的无胶制作方法
CN104799818A (zh) * 2015-04-23 2015-07-29 天津大学 面阵ccd的位置正弦波频率编码激励的成像光测量系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL128042C (el) * 1959-04-30

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US2137118A (en) * 1933-12-19 1938-11-15 Telefunken Gmbh Fluorescent screen
US2388203A (en) * 1942-09-10 1945-10-30 Philco Radio & Television Corp Viewing device for cathode-ray tube screens and the like
US2446440A (en) * 1947-01-28 1948-08-03 Rca Corp Color television tube
US2446791A (en) * 1946-06-11 1948-08-10 Rca Corp Color television tube
US2687360A (en) * 1951-01-18 1954-08-24 Rauland Corp Process for making a multicolor fluorescent screen

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US2725421A (en) * 1952-06-20 1955-11-29 Philco Corp Color television receiver with noisefree and phase corrected indexing signal

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US2137118A (en) * 1933-12-19 1938-11-15 Telefunken Gmbh Fluorescent screen
US2388203A (en) * 1942-09-10 1945-10-30 Philco Radio & Television Corp Viewing device for cathode-ray tube screens and the like
US2446791A (en) * 1946-06-11 1948-08-10 Rca Corp Color television tube
US2446440A (en) * 1947-01-28 1948-08-03 Rca Corp Color television tube
US2687360A (en) * 1951-01-18 1954-08-24 Rauland Corp Process for making a multicolor fluorescent screen

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941030A (en) * 1954-12-17 1960-06-14 Charles A Birch-Field Color television apparatus
US3005125A (en) * 1957-12-05 1961-10-17 Sylvania Electric Prod Display screen
US2985784A (en) * 1958-08-18 1961-05-23 American Optical Corp Optical image-forming devices
US3223872A (en) * 1962-08-13 1965-12-14 Paramount Pictures Corp Color screen with electron- and lightabsorptive material separating adjacent color strips
US3952225A (en) * 1970-02-24 1976-04-20 Zenith Radio Corporation Cathode-ray tube having phosphor screen interposed between composite mesh and reflective layer
US3979630A (en) * 1971-08-02 1976-09-07 Rca Corporation Shadow mask color picture tube having non-reflective material between elongated phosphor areas and positive tolerance
US4070596A (en) * 1971-08-27 1978-01-24 Tokyo Shibaura Electric Co., Ltd. In-line plural beams cathode ray tube having color phosphor element strips spaced from each other by intervening light absorbing areas and slit-shaped aperture mask
US3889145A (en) * 1972-08-30 1975-06-10 Tokyo Shibaura Electric Co Color cathode ray tube with phosphor strips concave toward vertical center line
US3779760A (en) * 1972-10-02 1973-12-18 Sony Corp Method of producing a striped cathode ray tube screen
US4023063A (en) * 1973-04-19 1977-05-10 U.S. Philips Corporation Color tube having channel electron multiplier and screen pattern of concentric areas luminescent in different colors
DE2617684A1 (de) 1975-04-23 1976-11-04 Rca Corp Druckverfahren fuer die herstellung einer photomaske
DE2661041C2 (el) * 1975-04-23 1989-07-13 Rca Licensing Corp., Princeton, N.J., Us
US4406971A (en) * 1976-04-20 1983-09-27 Mitsubishi Denki Kabushiki Kaisha Color cathode ray tube having a reference white fluorescent screen
US4757231A (en) * 1985-09-12 1988-07-12 Sony Corporation Beam-index type color cathode ray tube device
CN101937821A (zh) * 2010-03-30 2011-01-05 中山大学 真空设备荧光屏及该荧光屏的无胶制作方法
CN101937821B (zh) * 2010-03-30 2012-02-15 中山大学 真空设备荧光屏及该荧光屏的无胶制作方法
CN104799818A (zh) * 2015-04-23 2015-07-29 天津大学 面阵ccd的位置正弦波频率编码激励的成像光测量系统

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Publication number Publication date
NL212758A (el)
GB857451A (en) 1960-12-29
CH345665A (fr) 1960-04-15
DE1059028B (de) 1959-06-11
FR1162743A (fr) 1958-09-16

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