DE1288629B - Cathode ray tubes for color rendering - Google Patents

Cathode ray tubes for color rendering

Info

Publication number
DE1288629B
DE1288629B DEG43729A DEG0043729A DE1288629B DE 1288629 B DE1288629 B DE 1288629B DE G43729 A DEG43729 A DE G43729A DE G0043729 A DEG0043729 A DE G0043729A DE 1288629 B DE1288629 B DE 1288629B
Authority
DE
Germany
Prior art keywords
cathode ray
red
activated
color rendering
ray tubes
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.)
Pending
Application number
DEG43729A
Other languages
German (de)
Inventor
Palilla Frank C
Levine Albert K
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.)
GTE LLC
Original Assignee
General Telephone and Electronics 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 General Telephone and Electronics Corp filed Critical General Telephone and Electronics Corp
Publication of DE1288629B publication Critical patent/DE1288629B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
    • C09K11/7794—Vanadates; Chromates; Molybdates; Tungstates
    • 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
    • H01J29/187—Luminescent screens screens with more than one luminescent material (as mixtures for the treatment of the screens)
    • 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
    • H01J29/20—Luminescent screens characterised by the luminescent material
    • 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
    • H01J29/322—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 with adjacent dots
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Description

Die Erfindung betrifft eine verbesserte Kathodenstrahlröhre für die Verwendung in Farbfernsehempfängern. The invention relates to an improved cathode ray tube for use in color television receivers.

Gemäß der Erfindung besteht eine Kathodenstrahlröhre zur Farbwiedergabe aus einem Leuchtstoffschirm, welcher rotes, grünes und blaues Licht emittierende Leuchtstoffe enthält; die Röhre ist dadurch gekennzeichnet, daß der rotes Licht emittierende Leuchtstoff als Basismasse Yttriumvanadat, welches durch Europium aktiviert ist, enthält (Y, Eu)VO4.According to the invention, a cathode ray tube for color reproduction consists of a phosphor screen which contains phosphors emitting red, green and blue light; the tube is characterized in that the red light-emitting phosphor contains yttrium vanadate, which is activated by europium, as the base material (Y, Eu) VO 4 .

In den Zeichnungen istIn the drawings is

F i g. 1 eine perspektivische Schnittansicht einer typischen Farbfernseh-Bildröhre,F i g. 1 is a perspective sectional view of a typical color television picture tube;

Fig. 2 ein vergrößerter Ausschnitt von Fig. 1, welcher Einzelteile des Leuchtschirms zeigt.FIG. 2 shows an enlarged detail from FIG. 1, which shows individual parts of the luminescent screen.

Die in den Figuren gezeigte Kathodenstrahlröhre für Farbfernsehempfänger besteht aus einer Lochblendenröhre mit einem evakuierten Mantel 10. Der Mantel 10 enthält eine Vorrichtung zur Erzeugung von Kathodenstrahlen 16, welche die Kathodenstrahlquellen 13,14,15 und eine Lochblende 18 enthält. Die Lochblende 18 besitzt eine Vielzahl von Öffnungen 19, welche in einer Linie mit einer Leuchtstofftriade auf dem Leuchtschirm 12 angeordnet ist. Der Leuchtschirm 12 ist auf einer Frontplatte 11 angebracht. Der Mantel 10 ist dicht mit einem Anschlußsockel 17 verbunden. The cathode ray tube shown in the figures for color television receivers consists of a pinhole tube with an evacuated jacket 10. The jacket 10 contains a device for generating Cathode rays 16, which contain the cathode ray sources 13, 14, 15 and a pinhole diaphragm 18. the Perforated screen 18 has a plurality of openings 19 which are in line with a fluorescent triad the luminescent screen 12 is arranged. The luminescent screen 12 is attached to a front panel 11. Of the Jacket 10 is tightly connected to a connection socket 17.

Die blaues und grünes Licht emittierenden Leuchtstoffe können silberaktiviertes Zinksulfid und silberaktiviertes Zink-Cadmium-Sulfid sein. Der Rot emittierende Leuchtstoff besteht aus Yttriumvanadat, welches durch Europium aktiviert ist. Der Aktivator ersetzt das Kation der Wirtssubstanz in einem Ausmaß, welches zur Aufrechterhaltung der stöchiometrischen Verhältnisse erforderlich ist. Die angewandte Aktivatormenge liegt zwischen 0,5 und 10 Molprozent. Das durch Europium aktivierte Yttriumvanadat kann durch die FormelThe phosphors emitting blue and green light can be silver-activated zinc sulfide and silver-activated Be zinc cadmium sulfide. The red-emitting phosphor consists of yttrium vanadate, which is activated by europium. The activator replaces the cation of the host substance to the extent that which is necessary to maintain the stoichiometric ratios. The applied The amount of activator is between 0.5 and 10 mole percent. The activated by europium Yttrium vanadate can be obtained by the formula

dargestellt werden, in der χ die Molfraktion von Europium darstellt, welche das Yttrium ersetzte; das bedeutet, daß χ im Bereich von 0,005 bis 0,1 und vorzugsweise bei 0,05 liegt.in which χ represents the mole fraction of europium that replaced yttrium; this means that χ is in the range from 0.005 to 0.1 and preferably 0.05.

Der durch Europium aktivierte Yttriumvanadat-Leuchtstoff hat viele wünschenswerte Eigenschaften, welche den konventionellen Rotlicht emittierenden Leuchtstoffen, welche bisher in Farbf ernseh-Kathodenstrahlröhren Verwendung fanden, fehlen. Beispielsweise hat er eine weiße Körperfarbe und emittiert ein tiefrotes Licht, dessen Farbton von Schwankungen in der Größe der Elektronenstrahlstromdichte 13 unabhängig ist. Als Ergebnis hierfür kann ein breiterer Bereich drahtlos übertragener Farben mit größerer Treue durch die Kathodenstrahlröhre reproduziertThe yttrium vanadate phosphor activated by europium has many desirable properties, which the conventional red light emitting phosphors, which so far in color television cathode ray tubes Found use, are absent. For example, it has a white body color and emits a deep red light, the hue of which is independent of fluctuations in the magnitude of the electron beam current density 13 is. As a result of this, a wider range of wireless colors can be transmitted with greater Fidelity reproduced by the cathode ray tube

ίο werden. Hinzu kommt, daß die Leuchtkraft des durch den Vanadat-Leuchtstoff emittierten Lichtes eine lineare Funktion der Elektronenstrahlstromdichte 13 ist und die Größe dieser Leuchtkraft größer ist als die von konventionellen Rot emittierenden Leuchtstoffen erhaltene.ίο be. In addition, the luminosity of the the light emitted by the vanadate phosphor is a linear function of the electron beam current density 13 and the magnitude of this luminosity is greater than that of conventional red-emitting phosphors received.

In der Tabelle wird an Hand einiger betriebskennzeichnender Merkmale ein Vergleich zwischen einer konventionellen, nur Sulfid-Leuchtstoff, beispielsweiseThe table shows a comparison between a conventional, sulfide-only phosphor, for example

ao ZnS-CdS : Ag (rot),ao ZnS-CdS: Ag (red),

ZnS-CdS : Ag (grün) und
ZnS : Ag (blau),ZnS-CdS: Ag (green) and
ZnS: Ag (blue),

enthaltenden Drei-Farben-Kathodenstrahlröhre und einer Kathodenstrahlröhre, welche konventionelle Grün und Blau emittierende Leuchtstoffe und Rot emittierendes Europium aktiviertes Yttriumvanadat, speziell Y0j95Eu0i05VO4, enthält, gezogen. Die ungleichen Elektronenstrahlstromintensitäten, welche zur Erzeugung der gewünschten Farbe Weiß von 93000K erforderlich sind, werden in Mikroampere gemessen und üblicherweise in Strahlverhältnissen von Rot zu Grün und Rot zu Blau verglichen. Vom wirtschaftlichen Standpunkt aus sollten die Strahlverhältnisse so nahe wie möglich bei 1,0 liegen. Das Rot-zu-Blau-Verhältnis für die Röhre, welche Europium aktiviertes Yttriumvanadat enthält, kann in bekannter Weise durch Zusatz von Kobalt zu dem Blau emittierenden Leuchtstoff gesenkt werden. Dieser Zusatz vermindert die Leuchtkraft des blauen Leuchtstoffes. Das Ausmaß dieser Reduzierung ist jedoch geringer, als es für eine nur Sulfid-Leuchtstoff enthaltende Kathodenstrahlröhre erforderlich wäre, so daß die Gesamtleuchtkraft der Kathodenstrahlröhre mit Europium aktiviertem Yttriumvanadat größer ist als bei der nur Sulfide enthaltenden Röhre.containing three-color cathode ray tube and a cathode ray tube which contains conventional green and blue emitting phosphors and red emitting europium activated yttrium vanadate, especially Y 0j95 Eu 0i05 VO 4 . The unequal electron beam current intensities which are necessary to produce the desired white color of 9300 0 K are measured in microamperes and usually compared to beam ratios of red to green and red to blue. From an economic standpoint, the jet ratios should be as close to 1.0 as possible. The red-to-blue ratio for the tube which contains europium-activated yttrium vanadate can be reduced in a known manner by adding cobalt to the blue-emitting phosphor. This addition reduces the luminosity of the blue phosphor. However, the extent of this reduction is less than would be required for a cathode ray tube containing only sulfide phosphor, so that the overall luminosity of the cathode ray tube with europium activated yttrium vanadate is greater than that of the tube containing only sulfides.

GesamtstrahlTotal beam 800800 Vanadat-Sulfid-RöhreVanadate Sulphide Tube FarbColor 0,3260.326 Strahl-StromBeam current Sulfid-Röhre ohne Vanadat-ZusatzSulphide tube without added vanadate FarbColor yy Strahl-StromBeam current Strom inCurrent in 800800 LeuchtstärkeLuminosity koordinatencoordinates 0,0460.046 verhältnisrelationship LeuchtstärkeLuminosity koordinatencoordinates 0,3540.354 verhältnisrelationship FeldfarbeField color MikroampereMicroamps Ft. LambertsFt. Lamberts χ I y χ I y 0,5850.585 für 93000Kfor 9300 0 K Ft. LambertsFt. Lamberts 0,0460.046 für 93000Kfor 9300 0 K (Anfangs(At first 0,6450.645 —- (weiß)(White) (Anfangs(At first 0,6270.627 0,5850.585 (Weiß)(White) 500500 leuchtstärke)luminosity) 0,1570.157 leuchtstärke)luminosity) 0,1570.157 RotRed 500500 7,77.7 0,2560.256 —- 6,36.3 0,2560.256 —- Blaublue 500500 6,76.7 —- —- —- 3,93.9 —- —- Grüngreen 800800 35,235.2 —- —- 30,930.9 —- WeißWhite 28,128.1 22,022.0 (93000K)(9300 0 K) StrahlverhältnisseBeam ratios —- Rot/BlauRed Blue —- 1,821.82 —- 1,581.58 Rot/GrünRed Green —- 1,141.14 —- 1,381.38 —- —-

Claims (1)

Patentanspruch:Claim: Farbfernseh- Kathodenstrahlröhre
Leuchtstoffschirm, welcher rotes,Color television cathode ray tube
Fluorescent screen, which is red, mit einem grünes und blaues Licht aussendende Leuchtstoffe enthält, dadurch gekennzeichnet, daß der Rot emittierende Leuchtstoff Yttriumvanadat ist, welches durch 5,0 Molprozent Europium aktiviert ist.contains phosphors emitting green and blue light, thereby characterized in that the red-emitting phosphor is yttrium vanadate, which is activated by 5.0 mole percent europium.
DEG43729A 1964-05-28 1965-05-28 Cathode ray tubes for color rendering Pending DE1288629B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US370804A US3243625A (en) 1964-05-28 1964-05-28 Cathodoluminescent screens including vanadates of yttrium, gadolinium or lutetium activated with europium or samarium

Publications (1)

Publication Number Publication Date
DE1288629B true DE1288629B (en) 1969-02-06

Family

ID=23461262

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19666606181U Expired DE6606181U (en) 1964-05-28 1965-05-28 CATHODE TUBE FOR COLOR RENDERING
DEG43729A Pending DE1288629B (en) 1964-05-28 1965-05-28 Cathode ray tubes for color rendering

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19666606181U Expired DE6606181U (en) 1964-05-28 1965-05-28 CATHODE TUBE FOR COLOR RENDERING

Country Status (4)

Country Link
US (1) US3243625A (en)
DE (2) DE6606181U (en)
GB (1) GB1040827A (en)
NL (1) NL6506821A (en)

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
US3331982A (en) * 1964-10-20 1967-07-18 Sylvania Electric Prod High pressure electric discharge device having a fill including vanadium
US3423621A (en) * 1966-03-07 1969-01-21 Rca Corp Color picture display containing a red-emitting europium-activated yttrium oxysulfide phosphor
US3382393A (en) * 1966-09-08 1968-05-07 Nat Video Corp Color television tube with faceplate panel of high transmittance in the red color
US3497749A (en) * 1966-11-28 1970-02-24 Rca Corp Color display tube whose blue emitter is a silver-activated zinc sulphide containing only one of magnesium,calcium,strontium and barium
AT281140B (en) * 1967-02-20 1970-05-11 Fizichesky Inst Im Lebedeva Fluorescent screen for cathode ray tubes
US3579016A (en) * 1967-10-23 1971-05-18 Gen Telephone & Elect Postdeflection tube with all rare earth phosphors
US3517243A (en) * 1969-03-17 1970-06-23 Texas Instruments Inc Color display screen employing two layers of phosphors,particles in the inner layer being small with respect to those in the outer layer and discontinuous in coverage
US4119883A (en) * 1969-06-30 1978-10-10 Sony Corporation Cathode ray tube
JPS48104461A (en) * 1972-04-14 1973-12-27
JPS5132271A (en) * 1974-09-13 1976-03-18 Hitachi Ltd Heimenhyojipaneru no keikotai no fuchakuhoho
JPS61266488A (en) * 1985-05-21 1986-11-26 Mitsubishi Electric Corp Phosphor for cathode ray tube
US5788881A (en) * 1995-10-25 1998-08-04 Micron Technology, Inc. Visible light-emitting phosphor composition having an enhanced luminescent efficiency over a broad range of voltages

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US2569939A (en) * 1951-10-02 Infbared phosphoks
US2527365A (en) * 1945-05-22 1950-10-24 Rca Corp Doubly activated infrared phosphors
US2462547A (en) * 1945-08-08 1949-02-22 Polytechnic Inst Brooklyn Doubly activated infrared phosphors and methods of preparing same
US2522074A (en) * 1946-05-03 1950-09-12 Univ Rochester Method of rendering infrared radiation visible employing doubly activated alkaline earth sulfide phosphors
US2521124A (en) * 1946-08-09 1950-09-05 Neville F Miller Infrared strontium sulfide phosphors
US2570136A (en) * 1949-12-22 1951-10-02 Du Pont Infrared phosphors
US2569940A (en) * 1949-12-22 1951-10-02 Du Pont Infrared phosphors
US2729605A (en) * 1953-03-23 1956-01-03 Du Pont Samarium activated lanthanum oxychloride phosphor
US3037136A (en) * 1953-05-04 1962-05-29 Fairchild Camera Instr Co Cathode ray tube
US2791565A (en) * 1953-05-08 1957-05-07 Gen Electric Luminescent alkaline earth oxides
US3025161A (en) * 1955-06-27 1962-03-13 Sylvania Electric Prod Method of forming patterns
US3151945A (en) * 1958-02-03 1964-10-06 Bayer Ag Process for the production of pure borohydrides
US2988515A (en) * 1958-09-29 1961-06-13 Westinghouse Electric Corp Electroluminescent phosphor
US2991383A (en) * 1959-01-05 1961-07-04 Rca Corp Tri-color phosphor screens of the mosaic variety
USRE26184E (en) * 1961-08-07 1967-04-04 Van ultert

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
GB1040827A (en) 1966-09-01
US3243625A (en) 1966-03-29
NL6506821A (en) 1965-11-29
DE6606181U (en) 1970-09-03

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