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US3638063A - Grid structure for color picture tubes - Google Patents

Grid structure for color picture tubes Download PDF

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Publication number
US3638063A
US3638063A US790350A US3638063DA US3638063A US 3638063 A US3638063 A US 3638063A US 790350 A US790350 A US 790350A US 3638063D A US3638063D A US 3638063DA US 3638063 A US3638063 A US 3638063A
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US
United States
Prior art keywords
grid
braces
support
arms
grid elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US790350A
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English (en)
Inventor
Takuji Tachikawa
Akio Ohgoshi
Joshida Susumu
Akira Nakayama
Eiji Ishii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
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Publication of US3638063A publication Critical patent/US3638063A/en
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Classifications

    • 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
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
    • H01J29/803—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching for post-acceleration or post-deflection, e.g. for colour switching
    • 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
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0727—Aperture plate
    • H01J2229/0738—Mitigating undesirable mechanical effects
    • H01J2229/0744—Vibrations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0727—Aperture plate
    • H01J2229/075—Beam passing apertures, e.g. geometrical arrangements
    • H01J2229/0755—Beam passing apertures, e.g. geometrical arrangements characterised by aperture shape
    • H01J2229/0761—Uniaxial masks having parallel slit apertures, i.e. Trinitron type

Definitions

  • color cathode ray tubes employ, for electron beam postdeflection and focusing, a grid structure such that a plurality of parallel grid wires are stretched across a parallelogramic frame between a pair of opposed sides.
  • a grid structure is produced in the following manner. A plurality of parallel grid wires are stretched on a master frame under predetermined'taut conditions and a grid frame is put on the grid wires from inside of the master frame. The grid wires are then fixed to a pair of opposed supports of the grid frame and are thereafter severed along the margins of the grid frame.
  • the grid frame is prestressed inwardly by a turnbuckle to apply a maximum tension to the grid wires secured to the central portion of the opposed supports of the grid frame and a smaller tension to those fixed to end portions of the supports, ensuring that all the grid wires are subjected to substantially uniform tension by the restoring force of the prestressed grid frame after disassembling it from the master frame.
  • Such a grid structure may be regarded as one where a plurality of grid wires are stretched at substantially uniform tension on a parallelogramic frame prestressed in a manner to be displaced the most at the center of the frame.
  • a predetermined positive potential is applied to such a grid structure and electron beams are emitted from the electron gun of a cathode ray tube toward the fluorescent screen thereof, electron beams of several to lO-odd percent strike against the grid wires and are discharged therethrough to thereby heat the grid wires.
  • the temperature of the grid wires is raised several-l degrees and the wires expand.
  • a grid structure such as described above has been proposed in an attempt to increase the electron beam transmission factor of the so-called shadow mask in which a plate having bored therethrough a plurality of apertures is used as a mask for the electron beam.
  • the grid elements are secured only at both ends to the frame, so that the grid elements heated by electron beams striking thereon radiate heat mainly through the ends fixed to the frame.
  • the transmission factor of the electron beam through such a grid is lO-odd to 20-odd percent and the temperature of the grid elements rises up to 100 to 130 C. Consequently remains unchanged.
  • the electron beam strikes on a phosphor strip other than a predetermined one, especially a phosphor strip adjacent the predetermined one to cause unnecessary color emission. Therefore, the nonuniformity in the tension applied to the grid elements should be avoided.
  • one object of this invention is to provide a grid structure which is adapted such that the grid elements are always subjected to a predetermined tension and do not sag dur- .ing operation, though heated by electron beams.
  • Another object of this invention is to provide a grid structure for shadow-mask type color cathode ray tubes in which the grid elements heated by electron beams do no sag during operation to thereby ensure uniformity in the spacing between adjacent grid elements and hence prevent unnecessary bombardment of the phosphor strips by the electron beam.
  • Still another object of this invention is to provide a grid structure which is constructed such that the grid elements are protected from shocks applied from the outside and caused by electron beam bombardment.
  • FIG. 1 and 2 are schematic diagrams for explaining the present invention
  • FIG. 3 is a plan view showing one example of a grid structure for color cathode ray tubes produced according to this invention
  • FIG. 4 is a side view of the grid structure illustrated in FIG.
  • FIG. 5 is a plan view illustrating another example of the grid structure of this invention.
  • FIG. 6 is a schematic diagram showing the manner in the grid elements are mounted on a grid frame
  • FIG. 7 is a plan view showing another modified form of the present invention.
  • FIG. 8 is a cross-sectional view taken along the line A-A in FIG. 7;
  • FIG. 9 illustrates in perspective the plate supports employed in the example of FIG. 7;
  • FIG. 10 similarly shows in perspective a resilient support
  • FIG. 11 is a plan view showing still another modification of the present invention.
  • FIG. 12 is a side view of the grid structure depicted in FIG. 1 l.
  • FIG. 13 is a perspective view of the grid structure shown in FIG. 11. l
  • FIG. 1 is a schematic diagram showing displacement (indicated by broken lines) of a bar 1 of a length having two fulcra 2A and 28 when subjected to a uniformly distributed load 3 acting substantially perpendicular to the bar.
  • the fulcra 2A and 2B are located at such positions that the displacement 6 1 of both end portions of the bar 1 is equal to the displacement 8 of the central portion.
  • the length L of the bar does not indicate the actual length but a rang over which the load 3 is applied.
  • a pair of such bars are arranged in parallel relation as a pair of opposed frame members of a grid frame, a plurality of grid wires or elements stretched between the frame members which at substantially uniform tension are subjected to the aforementioned uniformly distributed load 3.
  • the displacement ratio of the frame of this invention is far smaller than that of the conventional grid frame (indicated by the full line A in FIG. 2) of the type where the fulcra are located at both ends of two bars constituting the frame members, and accordingly the grid frame of this invention virtually deformed as compared with the deformation of the conventional grid frame. If the rigidity of the bar 1 is increased up to maximum, the deformation ofthe frame can be neglected.
  • the tension of the rid wires or elements stretched between the two bars I and 1 (not shown) corresponding to the load 3 shown in FIG. 1 is produced by pressing the two bars with a resilient support (not shown) in a direction opposite to the load 3 in a manner to force away the two fulcra 2A and 2A (2A not shown) and 2B and 28' not shown) from each other.
  • a resilient support not shown
  • the grid structure of this invention comprises a frame of a predetermined configuration which consists of bar supports 4 and 4' corresponding to the aforementioned bars I and l and a pair of substantially C- shaped resilient supports 5 and 5 supporting the bar supports 4 and 4 at or in the vicinity of the Bessel points B B and B B thereof, and a plurality of ribbon-shaped grid elements of, for example, stainless steel are stretched between the bar supports 4 and 4' at a predetennined pitch under predetermined distribution of tension.
  • Reference numeral 7 indicates generally the grid structure.
  • the bar supports 4 and 4' may be formed of a metal such as iron, stainless steel or the like and in the illustrated example the bar supports 4 and 4' are square in cross section and are bent to conform to the panel to which the grid structure will be attached.
  • the resilient supports 5 and 5' may be formed of a metal such as iron, stainless steel or the like and are substantially C-shaped so as not to disturb the irradiation of the phosphor screen by the electron beam emitted from the electron gun ofa cathode ray tube. It is a matter of course that the supports 5 and 5' may be configured at will so long as they do not disturb the electron beam directed to the fluorescent screen of the cathode ray tube.
  • the grid elements 6 may also be formed of a metal such as iron, stainless steel or the like.
  • the pair of bar supports 4 and 4 constituting one portion of the frame are jointed to the resilient supports 5 and 5 as a unitary structure at or in the vicinity of the Bessel joints BA, B and B and B8.
  • the bar supports 4 and 4' may be regarded as a rigid body with respect to the load caused by the tension of the grid elements. Accordingly, when the grid elements 6 that are stretched between the bar supports 4 and 4' uniformly at a predetermined tension expand by heat resulting from the electron beam bombardment thereon, the bar supports 4 and 4 are pulled outwards by the resilient supports 5 and 5' in a parallel relationship by a distance corresponding to the length ofthe grid elements which have been extended by the thermal expansion. Consequently, although the absolute value of the tension is different from the initial one, the initial distribution of the tension over the entire grid elements remains unchanged.
  • a very complicated device is required for stretching grid elements on a grind frame, but this can be readily achieved by the following method.
  • a thin stainless steel plate 8 of a predetermined size is first prepared and is subjected to etching to remove selected areas, thus providing metal strips 8a arranged at a predetermined pitch.
  • slits 8b are formed for a predetermined number of metal strips 8a (every three metal strips in the figure) in the plate 8 at both marginal portions thereof.
  • slits 8c are formed in the plate 8 on both sides of the metal strips 8a. Portions 8d separated by the slits 8b are then respectively held by chucks 9A and 9B as shown in FIG. 6.
  • the number of the chucks 9A and 98 corresponds to that of the portions 8d.
  • the chucks 9B are supplied with a moderate tension in accordance with the thickness and the quality of material of the portions 8d, but such tension may be applied to both of the chucks 9A and 9B Substantially the same tension is applied to the metal strips by means of, for example, a coiled spring 10 as shown in the figure. Under such taut conditions, a pair of bar supports 11 and 11' are disposed under the plate 8 at predetermined positions and the plate 8 is welded to the bar supports.
  • the bar supports 11 and 11 are supported by a pair of resilient supports at or in the vicinity of their Bessel points, though not shown, and the resilient supports are slightly bent inwardly so as to apply a predetermined tension to the metal strips when the portions 8d are released from the chucks 9A and 9B.
  • the force for bending the two resilient supports be equal to the tension (the total tension of all the metal strips) applied to the metal strips by the spring 10.
  • the tension of the metal strips 8a due to the spring 10 is applied to the strips 8a by the resilient supports, so that the tension of the metal strips 8a remains unchanged before and after the removal of the chucks.
  • the portions 8d projecting outside of the bar supports 11 and 11' are cut off and both end portions of the slits 8c are also cut off.
  • the slits 8c are provided for facilitating the cutting of the plate 8, and hence they are not always necessary.
  • the metal strips 8a can readily be stretched between the bar supports 11 and 11 with predetermined distribution of the tension. In this use, the metal strips 8a are coupled together at both ends. It is possible, of course, that the end portions of the metal strips 8b are provided for preventing the plate 8 from becoming creased when applying a tension to the edges of the plate 8 and for ensuring uniformity of the tension applied to each metal strip 80. In the absence of the slits 8b, it is extremely difficult to apply the tension to the metal strips 8a with the predetermined distribution.
  • the distribution of the tension may be changed as desired in accordance with the shapes of the bar supports and the resilient supports and the condition of the resilient supports welded to the bar supports in the vicinity of the Bessel points thereof to ensure uniformity of the tension applied to the metal strips by the resilient supports.
  • the electron beam transmission factor depends upon the width of the metal strips or the diameter and the pitch of the metal wires, which are usually selected to render the electron beam transmission factor approximately 20 percent in view of the relationship to the width of each phosphor strip of the fluorescent screen of cathode ray tubes.
  • FIGS. 7 and 8 there is illustrated another example of this invention, in which reference numeral designates generally a grid structure.
  • a pair of plate supports 12 and 12' are supported by a frame like resilient support 13 at or in the vicinity of their Bessel points to provide a frame of a predetermined configuration, and grid elements 14 in the form of, for example, metal strips are stretched between the pair of platelike supports 12 and 12'.
  • the plate supports 12 and 12' may be formed of a metal such as iron, stainless steel or the like and, as shown in FIG. 9, one marginal edge of each plate support is curved so as to conform to the surface of the panel of a cathode ray tube with which the finished grid structure will be assembled.
  • the resilient support 13 may also be formed of a metal such as iron, stainless steel or the like and this support 13 has projections 13a at places substantially corresponding to the Bessel points of the plate supports 12 and 12 as illustrated in FIG. 10. Further, the support 13 has L-shaped plate support-retaining members 13b formed integrally at places corresponding to the projections 13a.
  • the pair of plate supports 12 and 12' are mounted on the retaining members 13b of the resilient support 13 in such a manner that the projections 13a of the support 13 engage the plate supports 12 and 12 at or in the vicinity of their Bessel points, and the plate supports and the resilient supports are held together by predetermined jigs in a manner to produce a predetermined pressure at or in the vicinity of the Bessel points of the plate supports 12 and 12 by the projections 13a of the resilient support 13. Then, the grid elements 14 are stretched between the pair of plate supports 12 and 12 at a predetermined distribution of tension.
  • the pair of plate supports 12 and 7 12' are supported by the projections 13a of the resilient support 13 at or in the vicinity of their Bessel points, so that the equilibrium of the tension is very stable after the grid elements 14 have once been stretched at the predetermined distribution of the tension. Accordingly, the equilibrium of the tension is not lost by a slight variation in the tension after stretching the grid elements 14 and the grid frame is not deformed. Further, the equilibrium of the tension is difficult to loose by thermal expansion of the frame or the grid elements 14 due to a temperature rise during operation, and even if the equilibrium of the tension is lost, the tension promptly balances, so that deformation of the frame is very slight.
  • the position of the grid elements 14 is not shifted and the electron beam always impinges upon the fluorescent screen accurately at a predetermined location, so that phenomenon such as color contamination is not caused thereby ensuring reproduction of a clear picture.
  • the grid structure described above is simple in construction, its fabrication is easy and the yield is greatly increased. Even if the grid elements 14 are stretched between the plate supports 12 and 12' at substantially uniform tension, the deformation of the frame is very slight as indicated by the dotted line B in FIG. 2. Accordingly, there is no possibility that the position of the grid elements 14 is shifted by a slight deformation of the frame and by thermal expansion of the grid elements or the frame due to a temperature rise. That is, even if the grid elements 14 are stretched at uniform tension, the aforementioned many advantages can still be obtained.
  • the assembling of the grid structure with the panel of a cathode ray tube can readily be achieved by the same means as mentioned previously or by other known means, and accordingly no description will be given. Further, it is needless to say that the aforementioned method can be used for stretching the grid elements, and the metal wires may be stretched at the grid elements 14 at a predetermined pitch in place of the metal strips.
  • the bar supports and the plate supports are desired to be formed of a conductive material so as to establish electric fields between the supports and the grid elements. Further, these supports are not restricted to the bar and plate supports.
  • FIGS. 11 to 13 there is shown still another example of this invention in which the grid structure is designed to prevent such unwanted vibration of the grid elements.
  • reference numerals 21A 22B represent substantially C-shaped resilient supports supporting the bar supports 21A and 21B at or in the vicinity of their Bessel points to constitute a grid frame generally designated by 23.
  • Reference numeral 24 identified grid elements such as ribbonlike metal strips which are stretched between the pair of bar supports 21A and 218 at a predetermined tension distribution and pitch.
  • a damping rod formed of, for example, a metal wire is provided in contact with the grid elements 24.
  • resilient pieces 26A and 26B are planted on the outside of the resilient supports 22A and 22B substantially at the center thereof, and the damping rod 25 is stretched between the resilient pieces 26A and 268.
  • the damping rod 25 is stretched in a direction of the lines of the raster (in the electron beam-scanning direction) and it is preferred that the damping rod 25 be stretched obliquely in a range of 30 to 45 relative to the electron beam scanning direction.
  • the grid elements 24 are resiliently pressed by the damping rod 25, and hence are not likely to be caused to vibrate by mechanical shocks from the outside and electron beam bombardment. Even if vibration occurs, it is immediately suppressed by the damping rod 25, thus preventing a bad influence by the vibration of the grid elements.
  • the provision of the damping rod 25 avoids not only the vibration of the grid elements but also irregularity in the spacing thereof which results from twisting of the grid elements.
  • the damping rod 25 presses the grid elements 24 to prevent twisting of the grid elements to hold the space between adjacent grid elements as predetermined, ensuring that the electron beam impinges only on a predetermined phosphor strip. Further, the provision of the damping rod 25 is only to stretch it in contact with the surfaces of the grid elements and hence can be achieved with great ease.
  • the damping rod 25 may be a mechanically strong metal wire of, for example, tungsten, stainless steel, inconel or the like. The use of such a mechanically strong wire avoids breakage of the damping rod or insufficient pressing of the grid elements as with conventional damping rods of glass fiber in grid structures for the Chromatron (Registered Trademark) type picture tubes.
  • the damping rod 25 formed of the above-mentioned metals or other ones is preferred in terms of mechanical strength and is free from secondary electron beam emission by the electron beam. It is preferred that the diameter of the damping rod 25 to 30 to 50 microns. With a diameter of, for example, 100 microns, the mechanical strength of the damping rod increased but the reproduced picture is adversely affected by the damping rod. With a diameter of less than 30 microns, the mechanical strength of the rod 25 decreases and its pressing effect of the grid elements becomes weak. With a smaller diameter damping rod, the bad influence on the reproduced picture is decreased correspondingly, but the influence of a damping rod 50 microns in diameter on the reproduced picture is hardly noticeable.
  • the damping rod 25 is stretched between the two resilient pieces 26A and 268 but either or both of them may be dispensed with.
  • the shape and position of the resilient pieces are not limited to those in the above example.
  • resilient wires are stretched on the frame on both sides of the grid elements instead of the resilient pieced and the damping rod is stretched between the resilient wires.
  • the damping rod 25 may be attached to the grid elements 25.
  • a support for the grid elements of a cathode ray tube comprising a pair of opposed parallel arms, a plurality of said grid elements affixed to said arms and extending transversely therebetween, a pair of generally C-shaped braces supporting said arms and attached thereto substantially at the Bessel points and formed to lie in surfaces substantially parallel to the surface defined by said grid elements, said braces being stressed a sufficient amount in a direction substantially parallel to the direction of said grid elements whereby as said grid elements expand said braces expand a corresponding amount to maintain the tension on all of said grid elements substantially uniform.
  • a support for a grid structure of a cathode ray tube comprising a pair of opposed parallel arms, a plurality of flexible grid wires affixed to said arms and extending therebetween, a pair of mechanically resilient braces supporting said arms and attached thereto at locations inwardly spaced from the ends of said arms substantially at the Bessel points, and said braces being stressed in a direction substantially parallel to the direction of said flexible grid wires to apply tension stress to said grid wires whereby as said flexible grid wires expand due to heat generated during the operation of the tube, said braces expand due to their resiliency and their being stressed a corresponding amount to maintain the tension on all of said flexible grid wires substantially uniform.
  • damping rod is flexible and is attached substantially to the center of said braces.
  • a support according to claim 8 wherein said damping rod has a diameter of between 30 and 50 microns.

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  • Electrodes For Cathode-Ray Tubes (AREA)
US790350A 1968-01-11 1969-01-10 Grid structure for color picture tubes Expired - Lifetime US3638063A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP165968 1968-01-11
JP165868 1968-01-11

Publications (1)

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US3638063A true US3638063A (en) 1972-01-25

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US790350A Expired - Lifetime US3638063A (en) 1968-01-11 1969-01-10 Grid structure for color picture tubes

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US (1) US3638063A (de)
AT (1) AT292804B (de)
BE (1) BE726699A (de)
CH (1) CH490731A (de)
CS (1) CS156430B2 (de)
DE (1) DE1901369B2 (de)
DK (1) DK140536B (de)
FR (1) FR2000176A1 (de)
GB (1) GB1240251A (de)
NL (1) NL149033B (de)
NO (1) NO124231B (de)
SE (1) SE348317B (de)

Cited By (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805106A (en) * 1969-12-18 1974-04-16 Gen Electric Electrostatic fly{40 s eye lens
FR2404914A1 (fr) * 1977-09-30 1979-04-27 Sony Corp Grille de tube d'image en couleur
US4333034A (en) * 1979-04-18 1982-06-01 Sony Corporation Grid structure for color cathode ray tube
US4495437A (en) * 1981-08-26 1985-01-22 Sony Corporation Grid apparatus for use with a color cathode ray tube
US4504764A (en) * 1981-05-08 1985-03-12 Sony Corporation Cathode ray tube with color selecting grill
EP0143938A2 (de) * 1983-09-30 1985-06-12 Zenith Electronics Corporation Farbbildröhre, Bestandteil dafür und Verfahren zu deren Herstellung
US4591344A (en) * 1983-09-30 1986-05-27 Zenith Electronics Corporation Method of fabricating a tension mask color cathode ray tube
US4593225A (en) * 1984-08-31 1986-06-03 Zenith Electronics Corporation Tension mask colar cathode ray tube
US4593224A (en) * 1983-09-30 1986-06-03 Zenith Electronics Corporation Tension mask cathode ray tube
US4614892A (en) * 1984-08-31 1986-09-30 Zenith Electronics Corporation Tension mask mounting structure
US4652791A (en) * 1985-04-30 1987-03-24 Zenith Electronics Corporation Color cathode ray tube and tensible shadow mask blank for use therein
US4656388A (en) * 1985-05-17 1987-04-07 Zenith Electronics Corporation Tensed mask color cathode ray tube and mask support frame therefore
US4682965A (en) * 1983-12-08 1987-07-28 Sony Corporation Method for manufacturing an electron beam selection electrode
US4686415A (en) * 1985-04-30 1987-08-11 Zenith Electronics Corporation Tensed mask color cathode ray tube and mask support frame therefor
US4695761A (en) * 1986-02-21 1987-09-22 Zenith Electronics Corporation Tension shadow mask support structure
US4710670A (en) * 1986-02-21 1987-12-01 Zenith Electronics Corporation Front assembly system for a tension mask color cathode ray tube
US4713034A (en) * 1985-07-23 1987-12-15 Zenith Electronics Corporation Means and method for manufacture of a high-resolution color cathode ray tube
US4721879A (en) * 1983-09-30 1988-01-26 Zenith Electronics Corporation Tensed mask cathode ray tube
US4721488A (en) * 1986-02-21 1988-01-26 Zenith Electronics Corporation Apparatus for tensing a shadow mask foil
US4723089A (en) * 1983-09-30 1988-02-02 Zenith Electronics Corporation Removable screening mount for a tensed mask cathode ray tube
US4728854A (en) * 1986-10-29 1988-03-01 Zenith Electronics Corporation Undulating support structure for tension shadow mask
US4730143A (en) * 1986-02-21 1988-03-08 Zenith Electronics Corporation Improved color cathode ray tube having a faceplate-mounted support structure with a welded-on high-tension foil shadow mask
US4739217A (en) * 1986-10-31 1988-04-19 Zenith Electronics Corporation A-shaped tension mask mounting rail
US4745328A (en) * 1986-12-16 1988-05-17 Zenith Electronics Corporation CRT tension mask support structure
US4766342A (en) * 1986-12-17 1988-08-23 Zenith Electronics Corporation Tension mask assembly for a color CRT
US4779023A (en) * 1986-05-21 1988-10-18 Zenith Electronics Corporation Component mounting means for a tension mask color cathode ray tube
US4780641A (en) * 1985-04-17 1988-10-25 Sony Corporation Color selective electrode of cathode ray tube
US4783614A (en) * 1986-10-28 1988-11-08 Zenith Electronics Corporation L-shaped support structure for tensioned shadow mask
US4790785A (en) * 1985-07-23 1988-12-13 Zenith Electronics Corporation Means and method for manufacture for a high-resolution color cathode ray tube
WO1988010006A1 (en) * 1987-06-09 1988-12-15 Zenith Electronics Corporation Vibration damping means for tension mask cathode ray tubes
US4804881A (en) * 1987-12-23 1989-02-14 Zenith Electronics Corporation Corner connectors for shadow mask support structure
US4849671A (en) * 1986-02-21 1989-07-18 Zenith Electronics Corporation Color cathode ray tube having a faceplate-mounted support structure with a welded-on high-tension foil shadow mask
US4857027A (en) * 1987-09-25 1989-08-15 Sony Corporation Method of manufacturing color screen structure for a cathode ray tube
US4900977A (en) * 1988-04-04 1990-02-13 Corning Incorporated Support system for flat CRT tension mask
US4902257A (en) * 1988-07-22 1990-02-20 Zenith Electronics Corporation Methods and apparatus for making flat tension mask color cathode ray tubes
US4926089A (en) * 1988-12-02 1990-05-15 Zenith Electronics Corporation Tied slit foil shadow mask with false ties
USRE33253E (en) * 1986-05-21 1990-07-03 Zenith Electronics Corporation Component mounting means for a tension mask color cathode ray tube
US4942332A (en) * 1988-12-02 1990-07-17 Zenith Electronics Corporation Tied slit mask for color cathode ray tubes
US4973280A (en) * 1988-07-22 1990-11-27 Zenith Electronics Corporation Method and apparatus for making flat tension mask color cathode ray tubes
US4973283A (en) * 1988-12-02 1990-11-27 Zenith Electronics Corporation Method of manufacturing a tied slit mask CRT
US4998901A (en) * 1988-07-22 1991-03-12 Zenith Electronics Corporation Method and apparatus for making flat tension mask color cathode ray tubes
USRE33698E (en) * 1986-02-21 1991-09-24 Zenith Electronics Corporation Color cathode ray tube having a faceplate-mounted support structure with a welded-on high-tension foil shadow mask
US5059147A (en) * 1988-07-22 1991-10-22 Zenith Electronics Corporation Method and apparatus for making flat tension mask color cathode ray tubes
WO1992012525A2 (en) * 1991-01-02 1992-07-23 Zenith Electronics Corporation Tension mask color crt with a curved faceplate
US5289080A (en) * 1991-08-21 1994-02-22 Samsung Electron Devices Co., Ltd. Mask frame damper for color cathode ray tubes
US5363011A (en) * 1992-11-12 1994-11-08 Zenith Electronics Corporation Strip-type shadow mask effective to alleviate degrouping
US5369330A (en) * 1991-06-13 1994-11-29 Nec Corporation Damp rod construction for CRT grid structures
US5382871A (en) * 1991-10-24 1995-01-17 Sony Corporation Color selecting structure for a cathode-ray tube
US5394051A (en) * 1992-12-28 1995-02-28 Zenith Electronics Corporation Vibration-damping configuration in a strip shadow mask
US5406168A (en) * 1991-11-20 1995-04-11 Nec Corporation Color picture tube grid apparatus having a color grid with slit holes
WO1995030998A2 (en) * 1994-05-06 1995-11-16 Philips Electronics N.V. Tension mask-frame assembly for crt
US5507677A (en) * 1995-06-26 1996-04-16 Thomson Multimedia S.A. Apparatus for pre-stressing CRT tension mask material
US5509842A (en) * 1995-06-26 1996-04-23 Rca Thomson Licensing Corp. Method for pre-stressing CRT tension mask material
EP0911857A2 (de) * 1997-10-20 1999-04-28 Sony Corporation Schattenmaske mit Vibrationsdämpfern
US6246164B1 (en) 1999-04-01 2001-06-12 Thomson Licensing S.A. Color picture tube having a low expansion tension mask attached to a higher expansion frame
US6280276B1 (en) * 1999-12-14 2001-08-28 Thomson Licensing S.A. Method of attaching a tension mask to a frame
US20020005689A1 (en) * 2000-07-12 2002-01-17 Bae Chul-Han Tension mask frame assembly of color picture tube
US6407488B1 (en) 1999-04-01 2002-06-18 Thomson Licensing S.A. Color picture tube having a low expansion tension mask
US6407490B1 (en) 1999-03-05 2002-06-18 Samsung Sdi Co., Ltd. Tension mask and tension mask and frame assembly for color cathode ray tube
US20030048061A1 (en) * 2001-09-11 2003-03-13 Sang-Ho Jeon Tension mask for color cathode-ray tube and tension mask frame assembly
US6614153B2 (en) 2000-07-12 2003-09-02 Samsung Sdi Co., Ltd. Mask for color picture tube
US20030168962A1 (en) * 2002-03-05 2003-09-11 Lee Soo Keun Electron gun for cathode ray tube
US6628056B2 (en) 2001-02-23 2003-09-30 Samsung Sdi Co., Ltd. Mask assembly for cathode ray tube
US6812627B2 (en) 2001-02-27 2004-11-02 Samsung Sdi Co., Ltd. Cathode ray tube having mask assembly for displaying clearer images
US6825600B2 (en) 2001-06-08 2004-11-30 Samsung Sdi Co., Ltd. Color selection apparatus for cathode ray tube having real and dummy bridges
WO2006073392A1 (en) * 2005-01-04 2006-07-13 Thomson Licensing S. A. Cathode ray tube having a tension mask and support frame assembly with dissimilar thermal expansion materials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622434A (ja) * 1985-06-27 1987-01-08 Sony Corp 陰極線管の色選別機構の製法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446271A (en) * 1946-01-23 1948-08-03 Eitel Mccullough Inc Electron tube grid structure
US2701847A (en) * 1951-10-02 1955-02-08 Machlett Lab Inc Color television tube structure
US2832911A (en) * 1954-05-27 1958-04-29 Gen Electric Thermal compensating grid frame
US3436585A (en) * 1964-04-20 1969-04-01 Nippon Electric Co Electron tube planar grid electrode
US3487253A (en) * 1967-08-28 1969-12-30 Us Army Mechanical damping of planar vacuum tube grids

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446271A (en) * 1946-01-23 1948-08-03 Eitel Mccullough Inc Electron tube grid structure
US2701847A (en) * 1951-10-02 1955-02-08 Machlett Lab Inc Color television tube structure
US2832911A (en) * 1954-05-27 1958-04-29 Gen Electric Thermal compensating grid frame
US3436585A (en) * 1964-04-20 1969-04-01 Nippon Electric Co Electron tube planar grid electrode
US3487253A (en) * 1967-08-28 1969-12-30 Us Army Mechanical damping of planar vacuum tube grids

Cited By (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805106A (en) * 1969-12-18 1974-04-16 Gen Electric Electrostatic fly{40 s eye lens
FR2404914A1 (fr) * 1977-09-30 1979-04-27 Sony Corp Grille de tube d'image en couleur
US4291253A (en) * 1977-09-30 1981-09-22 Sony Corporation Grid structure for color picture tube
US4333034A (en) * 1979-04-18 1982-06-01 Sony Corporation Grid structure for color cathode ray tube
US4504764A (en) * 1981-05-08 1985-03-12 Sony Corporation Cathode ray tube with color selecting grill
US4495437A (en) * 1981-08-26 1985-01-22 Sony Corporation Grid apparatus for use with a color cathode ray tube
EP0143938A2 (de) * 1983-09-30 1985-06-12 Zenith Electronics Corporation Farbbildröhre, Bestandteil dafür und Verfahren zu deren Herstellung
US4591344A (en) * 1983-09-30 1986-05-27 Zenith Electronics Corporation Method of fabricating a tension mask color cathode ray tube
US4721879A (en) * 1983-09-30 1988-01-26 Zenith Electronics Corporation Tensed mask cathode ray tube
US4593224A (en) * 1983-09-30 1986-06-03 Zenith Electronics Corporation Tension mask cathode ray tube
EP0143938A3 (de) * 1983-09-30 1986-08-13 Zenith Electronics Corporation Farbbildröhre, Bestandteil dafür und Verfahren zu deren Herstellung
US4723089A (en) * 1983-09-30 1988-02-02 Zenith Electronics Corporation Removable screening mount for a tensed mask cathode ray tube
US4682965A (en) * 1983-12-08 1987-07-28 Sony Corporation Method for manufacturing an electron beam selection electrode
US4593225A (en) * 1984-08-31 1986-06-03 Zenith Electronics Corporation Tension mask colar cathode ray tube
US4614892A (en) * 1984-08-31 1986-09-30 Zenith Electronics Corporation Tension mask mounting structure
US4780641A (en) * 1985-04-17 1988-10-25 Sony Corporation Color selective electrode of cathode ray tube
US4686415A (en) * 1985-04-30 1987-08-11 Zenith Electronics Corporation Tensed mask color cathode ray tube and mask support frame therefor
US4652791A (en) * 1985-04-30 1987-03-24 Zenith Electronics Corporation Color cathode ray tube and tensible shadow mask blank for use therein
US4656388A (en) * 1985-05-17 1987-04-07 Zenith Electronics Corporation Tensed mask color cathode ray tube and mask support frame therefore
US4713034A (en) * 1985-07-23 1987-12-15 Zenith Electronics Corporation Means and method for manufacture of a high-resolution color cathode ray tube
US4790785A (en) * 1985-07-23 1988-12-13 Zenith Electronics Corporation Means and method for manufacture for a high-resolution color cathode ray tube
US4849671A (en) * 1986-02-21 1989-07-18 Zenith Electronics Corporation Color cathode ray tube having a faceplate-mounted support structure with a welded-on high-tension foil shadow mask
US4730143A (en) * 1986-02-21 1988-03-08 Zenith Electronics Corporation Improved color cathode ray tube having a faceplate-mounted support structure with a welded-on high-tension foil shadow mask
US4721488A (en) * 1986-02-21 1988-01-26 Zenith Electronics Corporation Apparatus for tensing a shadow mask foil
USRE33698E (en) * 1986-02-21 1991-09-24 Zenith Electronics Corporation Color cathode ray tube having a faceplate-mounted support structure with a welded-on high-tension foil shadow mask
US4695761A (en) * 1986-02-21 1987-09-22 Zenith Electronics Corporation Tension shadow mask support structure
US4710670A (en) * 1986-02-21 1987-12-01 Zenith Electronics Corporation Front assembly system for a tension mask color cathode ray tube
USRE33253E (en) * 1986-05-21 1990-07-03 Zenith Electronics Corporation Component mounting means for a tension mask color cathode ray tube
US4779023A (en) * 1986-05-21 1988-10-18 Zenith Electronics Corporation Component mounting means for a tension mask color cathode ray tube
US4783614A (en) * 1986-10-28 1988-11-08 Zenith Electronics Corporation L-shaped support structure for tensioned shadow mask
US4728854A (en) * 1986-10-29 1988-03-01 Zenith Electronics Corporation Undulating support structure for tension shadow mask
US4739217A (en) * 1986-10-31 1988-04-19 Zenith Electronics Corporation A-shaped tension mask mounting rail
US4745328A (en) * 1986-12-16 1988-05-17 Zenith Electronics Corporation CRT tension mask support structure
US4766342A (en) * 1986-12-17 1988-08-23 Zenith Electronics Corporation Tension mask assembly for a color CRT
US4827179A (en) * 1987-06-09 1989-05-02 Zenith Electronics Corporation Mask vibration damping in cathode ray tubes
WO1988010006A1 (en) * 1987-06-09 1988-12-15 Zenith Electronics Corporation Vibration damping means for tension mask cathode ray tubes
US4857027A (en) * 1987-09-25 1989-08-15 Sony Corporation Method of manufacturing color screen structure for a cathode ray tube
US4804881A (en) * 1987-12-23 1989-02-14 Zenith Electronics Corporation Corner connectors for shadow mask support structure
US4900977A (en) * 1988-04-04 1990-02-13 Corning Incorporated Support system for flat CRT tension mask
US4902257A (en) * 1988-07-22 1990-02-20 Zenith Electronics Corporation Methods and apparatus for making flat tension mask color cathode ray tubes
US4973280A (en) * 1988-07-22 1990-11-27 Zenith Electronics Corporation Method and apparatus for making flat tension mask color cathode ray tubes
US4998901A (en) * 1988-07-22 1991-03-12 Zenith Electronics Corporation Method and apparatus for making flat tension mask color cathode ray tubes
US5059147A (en) * 1988-07-22 1991-10-22 Zenith Electronics Corporation Method and apparatus for making flat tension mask color cathode ray tubes
US4942332A (en) * 1988-12-02 1990-07-17 Zenith Electronics Corporation Tied slit mask for color cathode ray tubes
US4973283A (en) * 1988-12-02 1990-11-27 Zenith Electronics Corporation Method of manufacturing a tied slit mask CRT
US4926089A (en) * 1988-12-02 1990-05-15 Zenith Electronics Corporation Tied slit foil shadow mask with false ties
WO1992012525A2 (en) * 1991-01-02 1992-07-23 Zenith Electronics Corporation Tension mask color crt with a curved faceplate
WO1992012525A3 (en) * 1991-01-02 1992-08-20 Zenith Electronics Corp Tension mask color crt with a curved faceplate
US5369330A (en) * 1991-06-13 1994-11-29 Nec Corporation Damp rod construction for CRT grid structures
US5289080A (en) * 1991-08-21 1994-02-22 Samsung Electron Devices Co., Ltd. Mask frame damper for color cathode ray tubes
DE4214805C2 (de) * 1991-08-21 2002-06-20 Samsung Electronic Devices Maskenrahmendämpfer für Farbkathodenstrahlröhren
US5382871A (en) * 1991-10-24 1995-01-17 Sony Corporation Color selecting structure for a cathode-ray tube
US5406168A (en) * 1991-11-20 1995-04-11 Nec Corporation Color picture tube grid apparatus having a color grid with slit holes
US5363011A (en) * 1992-11-12 1994-11-08 Zenith Electronics Corporation Strip-type shadow mask effective to alleviate degrouping
US5394051A (en) * 1992-12-28 1995-02-28 Zenith Electronics Corporation Vibration-damping configuration in a strip shadow mask
US5554909A (en) * 1994-05-06 1996-09-10 Philips Electronics North America Corporation One dimensional tension mask-frame assembly for CRT
WO1995030998A3 (en) * 1994-05-06 1995-12-07 Philips Electronics Nv Tension mask-frame assembly for crt
WO1995030998A2 (en) * 1994-05-06 1995-11-16 Philips Electronics N.V. Tension mask-frame assembly for crt
US5507677A (en) * 1995-06-26 1996-04-16 Thomson Multimedia S.A. Apparatus for pre-stressing CRT tension mask material
US5509842A (en) * 1995-06-26 1996-04-23 Rca Thomson Licensing Corp. Method for pre-stressing CRT tension mask material
WO1997001860A1 (en) * 1995-06-26 1997-01-16 Rca Thomson Licensing Corporation Method for pre-stressing crt tension mask material
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US6388367B1 (en) 1997-10-20 2002-05-14 Sony Corporation Aperture grille for a CRT having damping members arranged outside of a screen region
US6407490B1 (en) 1999-03-05 2002-06-18 Samsung Sdi Co., Ltd. Tension mask and tension mask and frame assembly for color cathode ray tube
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US6246164B1 (en) 1999-04-01 2001-06-12 Thomson Licensing S.A. Color picture tube having a low expansion tension mask attached to a higher expansion frame
US6280276B1 (en) * 1999-12-14 2001-08-28 Thomson Licensing S.A. Method of attaching a tension mask to a frame
US20020005689A1 (en) * 2000-07-12 2002-01-17 Bae Chul-Han Tension mask frame assembly of color picture tube
US6614153B2 (en) 2000-07-12 2003-09-02 Samsung Sdi Co., Ltd. Mask for color picture tube
US6756724B2 (en) 2000-07-12 2004-06-29 Samsung Sdi Co., Ltd. Tension mask frame assembly of color picture tube
US6628056B2 (en) 2001-02-23 2003-09-30 Samsung Sdi Co., Ltd. Mask assembly for cathode ray tube
US6812627B2 (en) 2001-02-27 2004-11-02 Samsung Sdi Co., Ltd. Cathode ray tube having mask assembly for displaying clearer images
US6825600B2 (en) 2001-06-08 2004-11-30 Samsung Sdi Co., Ltd. Color selection apparatus for cathode ray tube having real and dummy bridges
US20030048061A1 (en) * 2001-09-11 2003-03-13 Sang-Ho Jeon Tension mask for color cathode-ray tube and tension mask frame assembly
US6917149B2 (en) 2001-09-11 2005-07-12 Samsung Sdi, Co., Ltd. Tension mask having shaped apertures for color cathode-ray tube and tension mask frame assembly
US20030168962A1 (en) * 2002-03-05 2003-09-11 Lee Soo Keun Electron gun for cathode ray tube
WO2006073392A1 (en) * 2005-01-04 2006-07-13 Thomson Licensing S. A. Cathode ray tube having a tension mask and support frame assembly with dissimilar thermal expansion materials

Also Published As

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GB1240251A (en) 1971-07-21
NO124231B (de) 1972-03-20
BE726699A (de) 1969-06-16
CS156430B2 (de) 1974-07-24
SE348317B (de) 1972-08-28
DE1901369B2 (de) 1972-01-20
DK140536B (da) 1979-09-24
DE1901369A1 (de) 1969-07-31
CH490731A (de) 1970-05-15
NL6900531A (de) 1969-07-15
DK140536C (de) 1980-02-18
AT292804B (de) 1971-08-15
NL149033B (nl) 1976-03-15
FR2000176A1 (de) 1969-08-29

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