US3731129A - Rectangular color tube with funnel section changing from rectangular to circular - Google Patents

Rectangular color tube with funnel section changing from rectangular to circular Download PDF

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Publication number
US3731129A
US3731129A US00084809A US3731129DA US3731129A US 3731129 A US3731129 A US 3731129A US 00084809 A US00084809 A US 00084809A US 3731129D A US3731129D A US 3731129DA US 3731129 A US3731129 A US 3731129A
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United States
Prior art keywords
rectangular
face plate
electron
circular
electron gun
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
US00084809A
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English (en)
Inventor
A Tsuneta
Y Ohta
M Ikegaki
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Toshiba Corp
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Tokyo Shibaura Electric Co Ltd
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Publication date
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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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/861—Vessels or containers characterised by the form or the structure thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H01J31/201—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode
    • H01J31/203—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H01J31/201—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode
    • H01J31/203—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam
    • H01J31/206—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam with three coplanar electron beams
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/86—Vessels and containers
    • H01J2229/8603—Neck or cone portions of the CRT vessel
    • H01J2229/8606—Neck or cone portions of the CRT vessel characterised by the shape
    • H01J2229/8609—Non circular cross-sections

Definitions

  • This invention relates to a color television receiving tube and more particularly to a color television receiving tube having a maximum deflection angle greater than 90 and utilizing a mask having perforations in the form of slits for passing electron beams and is suitable for wide angle deflection.
  • color television receivers it is desired to decrease the depth or the distance between the front and rear of the receiver cabinet. To satisfy this requirement it is essential to construct the color television receiving tube as a wide angle type. However, it is necessary to solve various problems such as increase in the diagonal misconvergence, increase in the deflection power and creation of the neck shadow. It is also necessary tomake easy adjustment of the convergence, and to improve the brightness and clearness of the reproduced image.
  • FIG. 1 of the accompanying drawings which shows a typical prior art color receiving tube including a phosphorescent surface mounted on the inner surface of a face plate la, a plurality of trios of dots 2 of three types of phosphorus emanating different colors are arranged on the inner surface of the face plate as a plurality of equilateral triangles.
  • a funnel 3a is provided with its opening sealed to the periphery of the face plate In and with its reduced diameter portion joined to a neck 6a containing a deflecting portion a surrounded by a deflecting device 4a.
  • An electron gun assembly comprising a plurality of electron gun units 7a which are disposed at the apices of an equilateral triangle is disposed in the neck 6a.
  • a shadow mask 9a In front of the phosphorescent surface is mounted a shadow mask 9a provided with a plurality of circular perforations 8 for transmitting electron beams.
  • Three electron beams 10 emitted from the electron gun assembly are deflected by the deflection magnetic field produced produced by a deflecting device 40 and converged in a perforation by means of a convergence adjuster 11 contained in the neck to pass through one of the perforations 8 so as to reproduce an image free from color mismatch.
  • Each of the electron beams from the electron gun unit is shifted in the direction of an arrow 13 (FIG. 2) by adjusting the intensity of the field between pole pieces of the convergence adjuster 11.
  • the degree of misconvergence along the diagonals can be reduced to about 0.5 mm in a conventional deflection tube.
  • the degree of diagonal misconvergence increases to about 2.5 mm which is too large for practical color receiving tubes.
  • Increased deflection angle requires larger deflection power so that it is necessary to reduce the diameter of neck 60 to prevent this increase in the deflection power.
  • the electron beams 10 travel along paths about 5 mm spaced apart from the tube axis and along the inner wall of the neck 6, if one tries to increase the deflection angle, with the conventional cross-sectional construction of the deflecting portion the electron beams 10 will collide upon the inner wall thereof, thus causing non-luminous portions or the so-called neck shadow at the ends of diagonals of the fluorescent surface where the electron beams do not reach.
  • the cross-sectional configuration of the deflecting portion 5a is circular as in the conventional design, the tendency of forming the neck shadow is increased as the diameter of the neck 6a is reduced.
  • an object of this invention to provide an improved wide deflection angle color receiving tube which can decrease the diagonal misconvergence, does not increase the convergence power, does not generate the neck shadow, can increase the deflection angle and can reproduce clear images.
  • a color receiving tube comprising a face plate; a fluorescent surface provided on the inner surface of the face plate and including a plurality of trios of fluorescent or phosphorescent materials emanating different colors; a funnel section having a larger peripheral portion sealed to the periphery of the face plate, a deflecting portion connected to the larger peripheral portion, and a neck connected to the deflecting portion; a deflecting device surrounding the deflecting portion; an electron gun assembly including three in-line electron gun units and contained in the neck; and a perforated mask disposed close to the fluorescent face, wherein the deflecting portion takes the form of a funnel whose cross-sectional configuration gradually varies from a shape similar to that of the image reproduced on the face plate to circular, and the mask is provided with a plurality of slits.
  • FIG. 1 shows a perspective view, partly in section, of a prior art color receiving tube having a shadow mask provided with circular perforations for transmitting electron beams;
  • FIG. 2 is an enlarged sectional view of an electron beam convergence adjusting device utilized in the prior art color receiving tube shown in FIG. 1;
  • FIG. 3 is a perspective view, partly in section, of one embodiment of the color receiving tube of the present invention.
  • FIG. 4 is a side view of the color receiving tube shown in FIG. 3',
  • FIGS. 5A to SE show sectional views of the face plate, funnel and the deflection portion taken along lines 5A5A to 5E5E (FIG. 4) respectively;
  • FIGS. 63 to 6E show another example of sectional views of the deflecting portion of the tube of the present invention.
  • FIG. 7 shows the arrangement of the slit shaped perforations for the electron beams of the shadow mask shown in FIG. 3;
  • FIG. 8 shows the arrangement of thecircular perforations for the electron beams of the shadow mask utilized in the prior art tube of FIG. 1;
  • FIG. 9 shows the arrangements of the electron gun units shown in FIG. 3 (solid lines) and of the electron guns shown in FIG. 1 (dotted lines);
  • FIG. 10 shows a modified arrangement of the electron gun units shown in FIG. 3.
  • an envelope of the receiving tube is shown as comprising a rectangular dish shaped panel 1 having a horizontal length H and a vertical length V of a ratio of approximately 4 3, and a funnel 3.
  • the reduced diameter portion of the funnel comprises a cylindrical neck 6 within which is disposed an electron gun assembly 16 including three unit electron guns 7 arranged side by side (in-line) in a common horizontal plane. Also a portion 17 of a convergence device is contained for adjusting the convergence of three electron beams emitted from respective electron gun units.
  • Deflecting portion 5 of the envelope is adjacent to neck 6 and in the form of a funnel gradually flaring outwardly from the neck.
  • a deflecting device 4 is mounted on the outside of deflecting portion 5 to deflect electron beams 10 in the horizontal and vertical directions.
  • the cross-sectional configuration of the large diameter portion of the deflecting portion is substantially rectangular similar to that of the image displayed on the face plate or panel 1.
  • the cross-sectional configuration gradually varies to circular as shown in FIG. SE successively through smaller rectangular (FIG. 5B), elliptical (FIG. 5C) and oval (FIG. 5D) shapes.
  • FIG. SE the configuration of the deflection portion is generally frustoconical.
  • a shadow mask 9 is disposed in front of panel 1 adjacent to the phosphorescent surface. As shown in FIG.
  • the shadow mask is provided with a plurality of slit shaped (generally rectangular) perforations 18, each having a length l and a width d, for transmitting the electron beams.
  • These slits are arranged in parallel vertical rows, with a horizontal pitch ofp and a vertical spacing of g. If desired the gaps g may be eliminated and the slits may be arranged in parallel horizontal rows.
  • a phosphorescent surface 22 is mounted on the inner surface of face plate 1 and is provided with a plurality of trios of stripe-shaped phosphorescent elements 20 for emanating three different colors, each stripe of the fluorescent material corresponding to each slit 18 of the shadow mask 9. These stripes of phosphorescent materials may be continuous, if desired.
  • the three electron beams 10 are deflected in the horizontal and vertical directions by the magnetic field generated by the deflecting device 4, converged in the perforations 18 of the shadow mask 9 and are then caused to impinge upon the trios of phosphors 20 to reproduce an image. Convergence of the electron beams is adjusted by the convergence device 17.
  • respective unit electron guns 7 of the electron gun assembly 16 are arranged in a common horizontal plane the convergence can be more readily adjusted than by the prior method of adjustment.
  • the dynamic convergence adjustment can be provided only by the horizontal component so that the adjustment is easier than in the prior electron gun assembly wherein the electron gun units are disposed at apices of an equilateral triangle.
  • the deflecting portion 5a were constructed in the form of a frustum of a cone as in the conventional tube, the beams would collide upon the tube wall to form the neck shadow.
  • an increase in the diameter of the deflecting portion 5a for the purpose of preventing the neck shadow results in increasing the deflection power.
  • the display surface of a receiving tube is in the form of a rectangle having a ratio of horizontal length H to vertical length V of approximately 4 3, for
  • the extent of the electron beams at the deflecting portion is also a smaller rectangle similar to the display surface. Accordingly, the electron beams are most liable to contact with the inner wall of the deflecting portion in the diagonal direction of the rectangle.
  • the cross-sectional configuration of the deflecting portion 5 where the deflection angle of the electron beams is largest is rectangular similar to the extent of the electron beams, it is possible to perfectly, prevent creation of the undesirable neck shadow.
  • the novel receiving tube having shadow mask 9 provided with vertical rows of slit shaped perforations 18 can greatly improve the percentage of transmission of the electron beams while maintaining a comparable degree of landing allowance as the conventional receiving tube utilizing a shadow mask provided with circular perforations, as shown in FIG. 1.
  • the quantity of information transmitted to the face plate through the shadow mask can be increased.
  • each slit shaped perforation can accommodate 2.5 to 3 electron beam spots so that the total number of the picture elements N is expressed as follows:
  • S represents the surface area of the display surface.
  • Moire fringes can be prevented when corresponding slits in respective rows are shifted vertically or dephased along straight lines inclined with respect to the horizontal.
  • Moire fringes can also be prevented by associating a wobbling device (not shown) with the deflecting device 4 or by placing the wobbling device between the deflecting device 4 and the electron gun assembly 16, said wobbling device oscillating at a frequency higher than the horizontal scanning frequency applied to the deflecting device 4 for causing the electron beams to scan horizontally while oscillating in the vertical scanning direction with a small amplitude.
  • a shadow mask with slit shaped perforations three unit electron guns arranged side by side in a common horizontal plane, and a funnel shaped deflecting portion having a cross-sectional configuration substantially similar to that of the image reproduced on the face plate so that it is possible to provide an improved wide deflection angle color receiving tube in which it is possible to readily adjust the convergence, can reduce misconvergence, does not create neck shadows, and can reproduce clear and bright images with lower deflection power.
  • an isosceles triangular arrangement 16' of three unit electron guns is also possible wherein two unit electron guns are disposed in. the horizontal scanning direction with a center distance of D whereas a third unit electron gun is disposed on a normal passing through the center of a line interconnecting the centers of the first two guns at a height of h D/2.
  • the first embodiment may be considered as a particular case wherein h 0.
  • the deflection portion was shown in the form of a frustum of a pyramid whose cross-sectional configuration varies from rectangular to circular through oval, the crosssectional configuration may vary from oval to circular as shown in FIGS. 6B to 6E.
  • the invention is also applicable to other types of color receiving tubes.
  • a color receiving tube having a maximum deflection angle greater than 90 comprising:
  • a face plate section for producing a rectangular shaped image
  • a phosphorescent surface provided on the inner surface of said face plate section and including a plurality of electron sensitive phosphors arranged in a regular pattern
  • a funnel section having a wider peripheral portion sealed to the periphery of said face plate section, and a deflection portion whose cross-sectional configuration gradually varies from a rectangular shape substantially similar to that of the rectangular image produced on said face plate section to a circular shape both internally and externally;
  • an electron gun assembly including three electrons

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  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US00084809A 1969-11-04 1970-10-28 Rectangular color tube with funnel section changing from rectangular to circular Expired - Lifetime US3731129A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44087632A JPS4834349B1 (fr) 1969-11-04 1969-11-04

Publications (1)

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US3731129A true US3731129A (en) 1973-05-01

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US00084809A Expired - Lifetime US3731129A (en) 1969-11-04 1970-10-28 Rectangular color tube with funnel section changing from rectangular to circular

Country Status (4)

Country Link
US (1) US3731129A (fr)
JP (1) JPS4834349B1 (fr)
DE (1) DE2054280B2 (fr)
NL (1) NL163366C (fr)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925700A (en) * 1973-12-10 1975-12-09 Nippon Electric Co Shadow mask for a black-stripe color picture tube having successively curved perforations
US3947718A (en) * 1973-03-06 1976-03-30 U.S. Philips Corporation Shadow mask having elongated apertures concave to vertical center line and increasing in pitch along x-axis with distance from said line
US3973159A (en) * 1973-02-21 1976-08-03 U.S. Philips Corporation Cathode-ray tube for displaying colored pictures
US4066924A (en) * 1974-05-22 1978-01-03 General Electric Company Screen for slotted aperture mask color television picture tube
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
US4186326A (en) * 1973-06-18 1980-01-29 Matsushita Electronics Corporation Shadow mask having vertical pitch about 8/(2n-1) times horizontal pitch
US4293791A (en) * 1979-11-15 1981-10-06 Rca Corporation Color picture tube having improved corrugated apertured mask
US4296189A (en) * 1979-05-24 1981-10-20 Rca Corporation Color picture tube having improved slit type shadow mask and method of making same
EP0813224A2 (fr) * 1996-05-14 1997-12-17 Kabushiki Kaisha Toshiba Tube à rayons cathodiques comprenant une bobine de déviation et ayant un entonnoir à forme améliorée
EP0831515A2 (fr) * 1996-09-18 1998-03-25 Kabushiki Kaisha Toshiba Tube à rayons cathodiques
EP0833364A2 (fr) * 1996-09-30 1998-04-01 Kabushiki Kaisha Toshiba Tube à rayons cathodiques
US5801481A (en) * 1996-04-26 1998-09-01 Kabushiki Kaisha Toshiba Cathode ray tube
US5861710A (en) * 1996-01-08 1999-01-19 Hitachi, Ltd. Color cathode ray tube with reduced moire
EP0917175A1 (fr) * 1997-11-14 1999-05-19 Kabushiki Kaisha Toshiba Tube à rayons cathodiques
US6002203A (en) * 1996-05-28 1999-12-14 Kabushiki Kaisha Toshiba Cathode ray tube having an envelope shaped to reduce beam deflection power requirements
EP0987733A2 (fr) * 1998-09-19 2000-03-22 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
EP0991104A2 (fr) * 1998-10-01 2000-04-05 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
EP0991105A2 (fr) * 1998-10-01 2000-04-05 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
EP0993018A2 (fr) * 1998-09-19 2000-04-12 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
US6087767A (en) * 1997-06-20 2000-07-11 Kabushiki Kaisha Toshiba CRT with non-circular cone and yoke
EP1052673A2 (fr) * 1999-05-14 2000-11-15 Schott Glas Entonnoir pour television à sections rectangulaires paraboliques
US6255766B1 (en) 1998-09-19 2001-07-03 Samsung Display Devices, Co., Ltd Cathode ray tube with convex interior walls for added stability
US6307314B1 (en) 1998-03-17 2001-10-23 Kabushiki Kaisha Toshiba Cathode ray tube with deflection yoke including non-circular separator
US6307313B1 (en) 1998-03-31 2001-10-23 Kabushiki Kaisha Toshiba Cathode ray tube apparatus
US6384525B1 (en) 1998-04-14 2002-05-07 Kabushiki Kaisha Toshiba Cathode-ray tube having a non-circular yoke section
US6396204B1 (en) * 1998-11-10 2002-05-28 Samsung Display Devices Co., Ltd. Cathode ray tube with enhanced beam deflection efficiency and minimized deflection power
US6404117B1 (en) 1998-03-16 2002-06-11 Kabushiki Kaisha Toshiba Cathode-ray tube device comprising a deflection yoke with a non-circular core having specified dimensional relationships
US6452321B1 (en) 1998-06-03 2002-09-17 Kabushiki Kaisha Toshiba Deflection device for a cathode ray tube having a correction coil with a non-circular shape
US6495951B1 (en) * 1999-05-12 2002-12-17 Lg Electronics Inc. Cathode-ray tube with enhanced yoke mounting structure
US6528936B1 (en) * 1998-11-10 2003-03-04 Samsung Display Devices Co., Ltd Cathode ray tube with funnel cone thickness variations
US6552483B1 (en) * 1999-05-10 2003-04-22 Lg Electronics Inc. Cathode-ray tube having improved yoke mounting part
US6720725B2 (en) * 2000-11-29 2004-04-13 Koninklijke Philips Electronics N.V. Picture display device with reduced deflection power
US20050194883A1 (en) * 2004-03-05 2005-09-08 Matsushita Toshiba Picture Display Co., Ltd. Cathode ray tube
US20060028115A1 (en) * 2004-08-05 2006-02-09 Matsushita Toshiba Picture Display Co., Ltd. Color picture tube
US20060049739A1 (en) * 2004-09-09 2006-03-09 Matsushita Toshiba Picture Display Co., Ltd. Cathode ray tube
US20060066207A1 (en) * 2004-08-17 2006-03-30 Matsushita Toshiba Picture Display Co., Ltd. Color picture tube
US20060066206A1 (en) * 2004-09-30 2006-03-30 Matsushita Toshiba Picture Display Co., Ltd. Cathode ray tube
US20060087215A1 (en) * 2004-10-22 2006-04-27 Matsushita Toshiba Picture Display Co., Ltd. Cathode ray tube
US20060132019A1 (en) * 2004-12-21 2006-06-22 Samsung Corning Co., Ltd. Funnel for use in a cathode ray tube

Citations (4)

* Cited by examiner, † Cited by third party
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GB656682A (en) * 1948-07-07 1951-08-29 English Electric Valve Co Ltd Improvements in or relating to cathode ray tubes
US2764628A (en) * 1952-03-19 1956-09-25 Columbia Broadcasting Syst Inc Television
US3517242A (en) * 1968-01-10 1970-06-23 Zenith Radio Corp Potential gradiant stabilized cathode-ray tube
US3652895A (en) * 1969-05-23 1972-03-28 Tokyo Shibaura Electric Co Shadow-mask having graduated rectangular apertures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB656682A (en) * 1948-07-07 1951-08-29 English Electric Valve Co Ltd Improvements in or relating to cathode ray tubes
US2764628A (en) * 1952-03-19 1956-09-25 Columbia Broadcasting Syst Inc Television
US3517242A (en) * 1968-01-10 1970-06-23 Zenith Radio Corp Potential gradiant stabilized cathode-ray tube
US3652895A (en) * 1969-05-23 1972-03-28 Tokyo Shibaura Electric Co Shadow-mask having graduated rectangular apertures

Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3973159A (en) * 1973-02-21 1976-08-03 U.S. Philips Corporation Cathode-ray tube for displaying colored pictures
US3947718A (en) * 1973-03-06 1976-03-30 U.S. Philips Corporation Shadow mask having elongated apertures concave to vertical center line and increasing in pitch along x-axis with distance from said line
US4186326A (en) * 1973-06-18 1980-01-29 Matsushita Electronics Corporation Shadow mask having vertical pitch about 8/(2n-1) times horizontal pitch
US3925700A (en) * 1973-12-10 1975-12-09 Nippon Electric Co Shadow mask for a black-stripe color picture tube having successively curved perforations
US4066924A (en) * 1974-05-22 1978-01-03 General Electric Company Screen for slotted aperture mask color television picture tube
US4296189A (en) * 1979-05-24 1981-10-20 Rca Corporation Color picture tube having improved slit type shadow mask and method of making same
US4293791A (en) * 1979-11-15 1981-10-06 Rca Corporation Color picture tube having improved corrugated apertured mask
US5861710A (en) * 1996-01-08 1999-01-19 Hitachi, Ltd. Color cathode ray tube with reduced moire
US5801481A (en) * 1996-04-26 1998-09-01 Kabushiki Kaisha Toshiba Cathode ray tube
CN1100340C (zh) * 1996-05-14 2003-01-29 东芝株式会社 阴极射线管
US5763995A (en) * 1996-05-14 1998-06-09 Kabushiki Kaisha Toshiba Cathode ray tube
EP0813224A2 (fr) * 1996-05-14 1997-12-17 Kabushiki Kaisha Toshiba Tube à rayons cathodiques comprenant une bobine de déviation et ayant un entonnoir à forme améliorée
EP0813224A3 (fr) * 1996-05-14 2000-02-09 Kabushiki Kaisha Toshiba Tube à rayons cathodiques comprenant une bobine de déviation et ayant un entonnoir à forme améliorée
US6002203A (en) * 1996-05-28 1999-12-14 Kabushiki Kaisha Toshiba Cathode ray tube having an envelope shaped to reduce beam deflection power requirements
EP0831515A2 (fr) * 1996-09-18 1998-03-25 Kabushiki Kaisha Toshiba Tube à rayons cathodiques
US5962964A (en) * 1996-09-18 1999-10-05 Kabushiki Kaisha Toshiba Cathode ray tube apparatus
EP0831515A3 (fr) * 1996-09-18 1998-09-02 Kabushiki Kaisha Toshiba Tube à rayons cathodiques
EP0833364A2 (fr) * 1996-09-30 1998-04-01 Kabushiki Kaisha Toshiba Tube à rayons cathodiques
US5929559A (en) * 1996-09-30 1999-07-27 Kabushiki Kaisha Toshiba Cathode ray tube
EP0833364A3 (fr) * 1996-09-30 1998-05-20 Kabushiki Kaisha Toshiba Tube à rayons cathodiques
US6087767A (en) * 1997-06-20 2000-07-11 Kabushiki Kaisha Toshiba CRT with non-circular cone and yoke
EP0917175A1 (fr) * 1997-11-14 1999-05-19 Kabushiki Kaisha Toshiba Tube à rayons cathodiques
US6268692B1 (en) 1997-11-14 2001-07-31 Kabushiki Kaisha Toshiba Cathode ray tube with contoured envelope
US6404117B1 (en) 1998-03-16 2002-06-11 Kabushiki Kaisha Toshiba Cathode-ray tube device comprising a deflection yoke with a non-circular core having specified dimensional relationships
US6307314B1 (en) 1998-03-17 2001-10-23 Kabushiki Kaisha Toshiba Cathode ray tube with deflection yoke including non-circular separator
US6307313B1 (en) 1998-03-31 2001-10-23 Kabushiki Kaisha Toshiba Cathode ray tube apparatus
US6384525B1 (en) 1998-04-14 2002-05-07 Kabushiki Kaisha Toshiba Cathode-ray tube having a non-circular yoke section
US6452321B1 (en) 1998-06-03 2002-09-17 Kabushiki Kaisha Toshiba Deflection device for a cathode ray tube having a correction coil with a non-circular shape
US6208068B1 (en) 1998-09-19 2001-03-27 Samsung Display Devices Co., Ltd. Cathode ray tube
EP0993018A3 (fr) * 1998-09-19 2002-06-12 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
US6188173B1 (en) 1998-09-19 2001-02-13 Samsung Display Devices Co., Ltd. Cathode ray tube
EP0987733A3 (fr) * 1998-09-19 2003-12-10 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
US6255766B1 (en) 1998-09-19 2001-07-03 Samsung Display Devices, Co., Ltd Cathode ray tube with convex interior walls for added stability
EP0987733A2 (fr) * 1998-09-19 2000-03-22 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
EP0993018A2 (fr) * 1998-09-19 2000-04-12 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
EP0991105A3 (fr) * 1998-10-01 2003-07-30 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
EP0991104A3 (fr) * 1998-10-01 2003-12-03 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
EP0991104A2 (fr) * 1998-10-01 2000-04-05 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
EP0991105A2 (fr) * 1998-10-01 2000-04-05 Samsung Display Devices Co., Ltd. Tube à rayons cathodiques
US6335588B1 (en) 1998-10-01 2002-01-01 Samsung Display Devices Co., Ltd. Cathode ray tube
US6396204B1 (en) * 1998-11-10 2002-05-28 Samsung Display Devices Co., Ltd. Cathode ray tube with enhanced beam deflection efficiency and minimized deflection power
US6528936B1 (en) * 1998-11-10 2003-03-04 Samsung Display Devices Co., Ltd Cathode ray tube with funnel cone thickness variations
US6552483B1 (en) * 1999-05-10 2003-04-22 Lg Electronics Inc. Cathode-ray tube having improved yoke mounting part
US6495951B1 (en) * 1999-05-12 2002-12-17 Lg Electronics Inc. Cathode-ray tube with enhanced yoke mounting structure
EP1052673A2 (fr) * 1999-05-14 2000-11-15 Schott Glas Entonnoir pour television à sections rectangulaires paraboliques
EP1052673A3 (fr) * 1999-05-14 2003-10-15 Schott Glas Entonnoir pour television à sections rectangulaires paraboliques
US6353284B1 (en) * 1999-05-14 2002-03-05 Schott Glas Glass funnel with a nearly rectangular cross-sectioned parabolic region especially for a television tube
US6720725B2 (en) * 2000-11-29 2004-04-13 Koninklijke Philips Electronics N.V. Picture display device with reduced deflection power
US20050194883A1 (en) * 2004-03-05 2005-09-08 Matsushita Toshiba Picture Display Co., Ltd. Cathode ray tube
US20060028115A1 (en) * 2004-08-05 2006-02-09 Matsushita Toshiba Picture Display Co., Ltd. Color picture tube
US7265484B2 (en) 2004-08-05 2007-09-04 Matsushita Toshiba Picture Display Co., Ltd. Color picture tube with curved shadow mask
US20060066207A1 (en) * 2004-08-17 2006-03-30 Matsushita Toshiba Picture Display Co., Ltd. Color picture tube
US20060049739A1 (en) * 2004-09-09 2006-03-09 Matsushita Toshiba Picture Display Co., Ltd. Cathode ray tube
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US20060087215A1 (en) * 2004-10-22 2006-04-27 Matsushita Toshiba Picture Display Co., Ltd. Cathode ray tube
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Also Published As

Publication number Publication date
DE2054280A1 (de) 1971-05-13
JPS4834349B1 (fr) 1973-10-20
NL163366B (nl) 1980-03-17
NL7016111A (fr) 1971-05-06
DE2054280B2 (de) 1973-12-13
NL163366C (nl) 1980-08-15

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