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EP0258831A2 - Structure associated with cathode ray tubes for monitors, television sets or the like - Google Patents

Structure associated with cathode ray tubes for monitors, television sets or the like

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Publication number
EP0258831A2
EP0258831A2 EP19870112513 EP87112513A EP0258831A2 EP 0258831 A2 EP0258831 A2 EP 0258831A2 EP 19870112513 EP19870112513 EP 19870112513 EP 87112513 A EP87112513 A EP 87112513A EP 0258831 A2 EP0258831 A2 EP 0258831A2
Authority
EP
Grant status
Application
Patent type
Prior art keywords
structure
associated
monitors
cathode
ray
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.)
Granted
Application number
EP19870112513
Other languages
German (de)
French (fr)
Other versions
EP0258831A3 (en )
EP0258831B1 (en )
Inventor
Dieter Müller
Wilhelm Rein
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.)
Flabeg GmbH
Original Assignee
Flachglas Wernberg GmbH
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
Family has litigation

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86Vessels; Containers; Vacuum locks
    • H01J29/89Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H01J29/898Spectral filters
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00Details of cathode ray tubes or electron beam tubes
    • H01J2229/89Optical components associated with the vessel
    • H01J2229/8913Anti-reflection, anti-glare, viewing angle and contrast improving treatments or devices
    • H01J2229/8916Anti-reflection, anti-glare, viewing angle and contrast improving treatments or devices inside the vessel

Abstract

Vorsatzaggregat für die Kathodenstrahlröhre von Monitoren, Fernsehapparaten und dergleichen, bestehend aus einer Glasscheibe, insbesondere einer Grauglasscheibe, einer vorderseitigen Antireflexionsausrüstung und einer rückseitigen Absorptionsbeschichtung, wobei die Absorptionsbeschichtung Metallatome aufweist. Attachment unit for the cathode ray tube of monitors, television sets and the like, comprising a glass sheet, particularly a gray glass sheet, a front anti-reflection equipment and a rear absorption coating, wherein the absorption coating metal atoms. Die Absorptionsbeschichtung ist einschichtig aus Chrom, einer Chrom/Nickel-Legierung oder Siliciden aufgebaut. The absorption coating is a single layer of chromium, constructed of a chromium / nickel alloy or silicides. Sie ist antistatisch eingerichtet und geerdet. It is antistatic furnished and grounded. Sie ist mit einer Dicke versehen, welche die Lichttransmission gegenüber der unbeschichteten Glasscheibe um etwa ein Drittel absenkt. It is provided with a thickness, which lowers the light transmission over the uncoated glass pane by about one third.

Description

  • [0001]
    Die Erfindung bezieht sich gattungsgemäß auf ein Vorsatzaggregat für die Kathodenstrahlröhre von Monitoren, Fernsehapparaten und dergleichen, - bestehend aus einer Glasscheibe, insbesondere einer Grauglasscheibe, einer vorderseitigen Antireflexionsausrüstung und einer rückseitigen Absorptionsbeschichtung, wobei die Absorptionsbeschichtung Metallatome aufweist. The invention relates generically to an attachment unit for the cathode ray tube of monitors, television sets and the like, - consisting of a glass sheet, particularly a gray glass sheet, a front anti-reflection equipment and a rear absorption coating, wherein the absorption coating metal atoms. Die vorderseitige Antireflexionsausrüstung ist weitgehend beliebig. The front-surface antireflection equipment is largely arbitrary. Sie kann z. It can, for. B. als mehrschichtige Auflage aus Substanzen wie Al₂O₃, Ta₂O₅, SiO₂, SnO₂, TiO₂, CeF₃, ZrO₂, MgF₂ ausgeführt sein, z. be designed as a multi-layered pad of substances such as Al₂O₃, Ta₂O₅, SiO₂, SnO₂, TiO₂, CeF₃, ZrO₂, MgF₂ as such. B. zweischichtig oder dreischichtig, in abwechselnder Folge hochbrechend oder niedrigbrechend. As two layers or three layers, high refractive index in an alternating sequence or low refractive index. Sie kann aber auch, insbesondere bei gebogenen Glasscheiben, als vorderseitige Feinätzung der Glasoberfläche ausgeführt sein. But it can also, particularly in curved glass panes, be designed as front fine etching the glass surface. - Der Begriff Glasscheibe umfaßt solche aus anorganischem Glas, insbesondere aus gehärtetem Sicherheitsglas, und aus Kunststoff. - The term glass sheet includes those made of inorganic glass, in particular of hardened safety glass, and plastic. Derartige Vorsatzaggregate werden vor dem sogenannten Leuchtschirm der Kathodenstrahlröhre, der insbesondere bei Monitoren auch als Anzeigevorrichtung bezeichnet wird, eingesetzt und mit diesem vereinigt. Such header units are used prior to the so-called phosphor screen of the cathode ray tube, which is in particular referred to in monitors as a display device and combined therewith.
  • [0002]
    Bei dem bekannten gattungsgemäßen Vorsatzaggregat (EP 00 18 667) ist die Absorptionsbeschichtung zweischichtig. In the known generic attachment unit (EP 00 18 667), the absorption coating has two layers. Sie besteht aus einer Metallschicht, die unter anderem aus Chrom oder aus einer Chromlegierung aufgebaut sein kann, aber nicht zwingend aus diesen Werkstoffen besteht, und aus einer dielektrischen Schicht. It consists of a metal layer, which may be comprised, among others, of chromium or of a chromium alloy, but not necessarily composed of these materials, and a dielectric layer. Die Metallschicht besitzt einen komplexen Brechungsindex, bei dem der Quotient aus dem Imaginärteil und dem Realteil im Bereich zwischen 0,7 bis 3,0 liegt. The metal layer has a complex refractive index in which the quotient of the imaginary and the real part in a range between 0.7 to 3.0. Die dielektrische Schicht hat einen Brechungsindex im Bereich von 1,35 bis 1,70. The dielectric layer has a refractive index in the range from 1.35 to 1.70. Durch diese zweischichtige Absorptionsbeschichtung soll die sogenannten Lichthofbildung unterdrückt, dh der Kontrast verbessert werden. By this two-layer coating, the absorption of so-called halation to be suppressed, that is, the contrast can be improved. Insoweit ist es bekannt (DE 23 30 898), daß eine in der beschriebenen Weise angeordnete Absorptionsbeschichtung kontraststeigernd wirken kann. In that regard, it is known (DE 23 30 898) that a arranged in the manner described absorption coating may have a contrast enhancing. Bei der bekannten gattungsgemäßen Ausführungsform bleiben jedoch die Kontrastwirkung und Reflexions minderung verbesserungsfähig. In the known generic embodiment, the contrast effect and reflection remain reduction improvement.
  • [0003]
    Der Erfindung liegt die Aufgabe zugrunde, bei einem Vorsatzaggregat des beschriebenen Aufbaus die Kontrastwirkung zu verbessern sowie eine weitere Reflexionsminderung herbeizuführen, und zwar bei ausreichender Korrosionsbeständigkeit. The invention has for its object to improve the contrast effect in a header unit of the structure described, as well as to bring about a further reduction in reflection, namely with sufficient corrosion resistance.
  • [0004]
    Zur Lösung dieser Aufgabe lehrt die Erfindung, daß die Absorptionsbeschichtung einschichtig aus Chrom, einer Chrom/Nickel-Legierung oder Siliciden aufgebaut und antistatisch eingeric htet und geerdet sowie mit einer Dicke versehen ist, welche die Lichttransmission gegenüber der unbeschichteten Glasscheibe um etwa ein Drittel absenkt. To achieve this object the invention is that the absorption coating single layer of chromium, a chromium / nickel alloy or silicides constructed and antistatic eingeric htet and grounded, and is provided with a thickness, which lowers the light transmission over the uncoated glass pane by about a third teaches. Grundsätzlich sind dabei alle Übergangsmetallsilicide einsetzbar, insbesondere Chrom- und Chrom-Nickel-Silicide. In principle, all Übergangsmetallsilicide be used thereby, particularly chromium and chromium-nickel silicides. Bevorzugt wird mit Chrom oder mit einer Legierung gearbeitet, die hauptsächlich aus 20. Gew.-% Chrom und 80 Gew.-% Nickel aufgebaut ist. Is preferably carried out with chromium or with an alloy mainly wt .-% chromium and from 20 wt .-% constructed 80 is nickel. Werden die Absorptionsschichten im Wege der Magnetron-Kathodenzerstäubung aufgebracht, so sind sie besonders kratzfest, was die Korrosionsbeständigkeit unterstützt. When the absorption layers applied by means of magnetron cathode sputtering, so they are particularly scratch resistant, supporting the corrosion resistance. Zu besonders günstigen Ergebnissen kommt man, wenn die beschriebene Einrichtung der Absorptionsbeschichtung mit besonderen Antireflexionsausrüstungen kombiniert wird, nämlich Antireflexionsausrüstungen aus den drei Schichten Particularly favorable results you get when setting up the absorption coating described is combined with special anti-reflective equipment, namely anti-reflection equipment from the three layers
    • 1. Al₂O₃ Brechungsindex n = 1.63, optische Dicke n *d = λ/4 1. Al₂O₃ refractive index n = 1.63, optical thickness n * d = λ / 4
    • 2. Ta₂O₅ Brechungsindex n = 2.1, optische Dicke n = *d λ/2 2. Ta₂O₅ refractive index n = 2.1, optical thickness n * d = λ / 2
    • 3. MgF₂ Brechungsindex n = 1.38, optische Dicke n *d = λ/4 3. MgF₂ refractive index n = 1.38 optical thickness n * d = λ / 4
    oder aus den drei Schichten or from the three layers
    • 1. CaF₃ Brechungsindex n = 1.64, optische Dicke n *d = λ/4 1. CaF₃ refractive index n = 1.64, optical thickness n * d = λ / 4
    • 2. ZrO₂ Brechungsindex n = 2.05, optische Dicke n *d = λ/2 2. ZrO₂ refractive index n = 2.05 optical thickness n * d = λ / 2
    • 3. MgF₂ Brechungsindex n = 1.38, optische Dicke n *d = λ/4 3. MgF₂ refractive index n = 1.38 optical thickness n * d = λ / 4
    besteht, wobei die erste Schicht stets auf der Glasscheibe angeordnet ist. , wherein the first layer is always arranged on the glass pane. Man kann aber auch mit einem Zweischichtensystem arbeiten, beispielsweise mit dem System But you can also work with a two-layer system, for example, with the system
    • 1. SnO₂ Brechungsindex n = 2.0, optische Dicke n *d = 2 λ/23 1. SnO₂ refractive index n = 2.0, optical thickness n * d = λ 2/23
    • 2. SiO₂ Brechungsindex n = 1.5, optische Dicke n *d = 3λ /10 2. SiO₂ refractive index n = 1.5, optical thickness n * d = 3λ / 10
  • [0005]
    Die Lehre der Erfindung führt zu überraschenden Effekten: Wenn die Absorptionsschicht aus den genannten Substanzen eine Dicke aufweist, welche die Lichttransmission gegenüber der unbeschichteten Glasscheibe (unabhängig vom ursprünglichen Lichttransmissionsgrad) um etwa ein Drittel absenkt, so wird nicht nur die Kontrastwirkung, sondern gleichzeitig auch die Entspiegelung verbessert. The teaching of the invention leads to surprising effects: When the absorbing layer of the above-mentioned substances has a thickness, which lowers the light transmission over the uncoated glass pane by about one third (regardless of the original light transmission), it is not only the contrast effect, but also the antireflection improved. Zwar ist die Entspiegelung grundsätzlich dadurch bestimmt, daß eine vorderseitige Antireflexionsausrüstung vorgesehen ist, die Entspiegelung, die durch Kombination mit der erfindungsgemäßen Absorptionsbeschichtung erreicht wird, ist jedoch wirksamer und farbneuträler. Although the antireflection coating is generally determined by the fact that a front side antireflection equipment is provided, but the antireflection coating, which is achieved by combination with the inventive absorption coating is effective and farbneuträler. Eventuell auftretende ultraviolette Strahlen werden gedämpft. Possibly occurring ultraviolet rays are attenuated. Auch Störungen, die bei der bekannten Ausführungsform auf statischer Aufladung der Absorptionsbeschichtung beruhen, treten nicht auf. Disturbances that are based on static absorption coating in the known embodiment, do not occur. Wo mit einer Monitorlupe gearbeitet wird, ist eine gute Abstimmung zwischen der Monitorlupe und dem Vorsatzaggregat möglich. Where people work with a monitor magnifier, a good coordination between the monitor and the magnifier attachment unit is possible. Durch die rückseitige, leitfähige Absorptionsbeschichtung wird neben einer Entspiegelung im sichtbaren Spektralbereich zugleich eine merkliche Absenkung der Lichttransmission erreicht, so daß eine erheblich verbesserte Dämpfung der an der nicht entspiegelten Bildoberfläche auftretenden Lichtreflexe erzielt wird. The backside conductive absorption coating is achieved at the same time a noticeable reduction of the light transmittance in addition to an anti-reflective coating in the visible spectral range, so that a considerably improved attenuation of the reflections occurring at the non-anti-glare screen surface is achieved. Die rückseitige Absorptionsbeschichtung wirkt aufgrund des vorgeschlagenen Beschichtungsmaterials und der gewählten Schichtdicke als farbneutrale Entspiegelung im sichtbaren Spektralbereich mit zugleich hinreichender Leitfähigkeit, um elektrostatische Aufladungen mit Hilfe einer Erdung der Absorptionsbeschichtung abzuleiten. The rear absorption coating acts due to the proposed coating material and the layer thickness selected as a color-neutral antireflection in the visible spectral range at the same time with a sufficient degree of conductivity to dissipate static electricity by means of a grounding of the absorption coating. Die durch elektrostatische Aufladung bedingte Verschmutzung der Bildschirmoberfläche und die damit zusammenhängende Verminderung der Bildschärfe werden dadurch verhindert. The conditional by electrostatic charging pollution of the screen surface and the associated reduction in image sharpness can be prevented. Ein weiterer Vorteil ist der Schutz elektronischer Bauteile vor dem Statik-Schock. Another advantage is the protection of electronic devices from the static shock. Die Glasscheibe des erfindungsgemäßen Vorsatzaggregates ist bei den üblichen Umwelteinflüssen auch ausreichend korrosionsbeständig. The glass pane of the header unit of the invention is also sufficiently corrosion resistant to the usual environmental influences.
  • [0006]
    Zur Optimierung tragen die Merkmale des Anspruches 2 bei. In order to optimize the features of claim 2 contribute. Im Rahmen der Erfindung kann mit handelsüblichen Glasarten gearbeitet werden. In the context of the invention can be used with commercially available glass types. Bevorzugte Ausführungsformen sind Gegenstand der Ansprüche 3 bis 5. Preferred embodiments are subject matter of claims 3 to. 5
  • Ausführungsbeispiel: Embodiment:
  • [0007]
    Auf eine Grauglasscheibe mit 3 mm Dicke und 60 % Lichtdurchlässigkeit wurde zunächst in einer Hochvacuum Bedampfungs anlage eine Antireflexionsbeschichtung, bestehend aus einer λ/4-Schicht Al₂O₃ mit dem Brechungsindex n = 1.63, einer λ/2-Schicht Ta₂O₅ mit dem Brechungsindex n = 2.1 und schließlich mit einer λ/4-Schicht MgF₂ mit dem Brechungsindex n = 1.38 aufgedampft. To a gray glass sheet having 3 mm thickness and 60% light transmission was initially in a high-vacuum vapor deposition system, an antireflective coating consisting of a λ / 4 layer of Al₂O₃ having a refractive index n = 1.63, a λ / 2 layer Ta₂O₅ with the refractive index n = 2.1 and finally evaporated with a λ / 4 layer MgF₂ having a refractive index n = 1.38. Dann wurden der Transmissionsgrad sowie der Reflexionsgrad gemessen. Then, the transmittance and the reflectance were measured. Anschließend wurde die rückseitige Glasfläche in einer Magnetron-Kathodenzerstäubungsanlage mit einer Absorptionsbeschichtung aus Cr beschichtet, so daß die Lichtdurchlässigkeit auf 40 % abgesenkt wurde und sich eine Leitfähigkeit einstellte, die einem Flächenwiderstand von 1 Kiloohm zugeordnet werden konnte. Then, the back glass surface was coated in a magnetron cathode sputtering system with an absorption coating of Cr, so that the light transmittance was lowered to 40% and a conductivity ceased, which could be assigned to a surface resistance of 1 kilo-ohm. Danach wurden wiederum der Transmissionsgrad und der Reflexionsgrad gemessen. After that turn the transmittance and reflectance were measured.
  • [0008]
    Die Fig. 1 zeigt den Transmissionsgrad (%), die Fig. 2 den Reflexionsgrad (%), jeweils über der Wellenlänge. Fig. 1 shows the transmittance (%), Fig. 2 shows the reflectance (%), respectively to the wavelength. Die ausgezogenen Kurven geben die Meßwerte der nur mit der Antireflexionsbeschichtung versehenen Glasscheibe wieder, die gestrichelten Kurven die Meßwerte der zusätzlich mit der Absorptionsbeschichtung versehenen Glasscheibe. The solid curves show the measured values ​​of the glass sheet provided with the antireflection coating again, the dashed curves, the measured values ​​of the glass pane additionally provided with the absorbing coating. Die erreichte Verbesserung ist augenscheinlich. The improvement achieved is obvious. Außerdem stellte sich eine beachtliche Verbesserung der Kontrastwirkung ein. In addition, a considerable improvement of the contrast effect ceased.

Claims (5)

  1. 1. Vorsatzaggregat für die Kathodenstrahlröhr von Monitoren, Fernsehapparaten und dergleichen, - bestehend aus 1. attachment unit for the Kathodenstrahlröhr of monitors, television sets and the like, - consisting of
    einer Glasscheibe, insbesondere einer Grauglasscheibe, a glass sheet, particularly a gray glass sheet,
    einer vorderseitigen Antireflexionsausrüstung und a front-surface antireflection equipment and
    einer rückseitigen Absorptionsbeschichtung, a rear absorption coating
    wobei die Absorptionsbeschichtung Metallatome aufweist, dadurch gekennzeichnet , daß die Absorptionsbeschichtung einschichtig aus Chrom, einer Chrom/Nickel-Legierung oder Siliciden aufgebaut und antistatisch eingerichtet und geerdet sowie mit einer Dicke versehen ist, welche die Lichttransmission gegenüber der unbeschichteten Glasscheibe um etwa ein Drittel absenkt. wherein the absorption coating metal atoms, characterized in that the absorber coat one layer of chromium, a chromium / nickel alloy or silicides constructed and antistatic established and is grounded and provided with a thickness which decreases the light transmission over the uncoated glass pane by about one third.
  2. 2. Vorsatzaggregat nach Anspruch 1, dadurch gekennzeichnet, daß die Absorptionsbeschichtung einen Flächenwiderstand von 0,5 bis 20 Kiloohm, vorzugsweise von etwa 1 Kiloohm, aufweist. 2. attachment unit according to claim 1, characterized in that the absorption coating has a surface resistance of 0.5 to 20 kiloohm, preferably about 1 kiloohm.
  3. 3. Vorsatzaggregat nach einem der Ansprüche 1 oder 2, gekennzeichnet durch die Verwendung einer Glasscheibe aus klarem Floatglas oder aus grauem Floatglas. 3. attachment unit according to one of claims 1 or 2, characterized by the use of a glass sheet made of clear float glass or of gray float glass.
  4. 4. Vorsatzaggregat nach Anspruch 3, dadurch gekennzeichnet, daß die Absorptionsbeschichtung eine Dicke aufweist, die die Lichttransmission auf etwa 60 % bei klarem Floatglas und auf etwa 40 % bei grauem Floatglas absenkt. 4. attachment unit according to claim 3, characterized in that the absorption coating has a thickness, which lowers the light transmission to about 60% for clear float glass and to about 40% for gray float glass.
  5. 5. Vorsatzaggregat nach einem der Ansprüche 1 oder 2, gekennzeichnet durch die Verwendung einer Glasscheibe aus Maschinengrauglas und durch eine Dicke der Absorptionsschicht, die die Lichttransmission auf etwa 21 % absenkt. 5. attachment unit according to one of claims 1 or 2, characterized by the use of a glass sheet from machine gray glass and a thickness of the absorption layer, which lowers the light transmission to about 21%.
EP19870112513 1986-09-03 1987-08-28 Structure associated with cathode ray tubes for monitors, television sets or the like Expired - Lifetime EP0258831B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE3629996 1986-09-03
DE19863629996 DE3629996C2 (en) 1986-09-03 1986-09-03

Publications (3)

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EP0258831A2 true true EP0258831A2 (en) 1988-03-09
EP0258831A3 true EP0258831A3 (en) 1988-12-28
EP0258831B1 EP0258831B1 (en) 1992-04-22

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EP19870112513 Expired - Lifetime EP0258831B1 (en) 1986-09-03 1987-08-28 Structure associated with cathode ray tubes for monitors, television sets or the like

Country Status (5)

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US (1) US4804883A (en)
EP (1) EP0258831B1 (en)
DE (1) DE3629996C2 (en)
DK (1) DK168873B1 (en)
ES (1) ES2031099T3 (en)

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Also Published As

Publication number Publication date Type
EP0258831A3 (en) 1988-12-28 application
DK457387D0 (en) 1987-09-02 grant
EP0258831B1 (en) 1992-04-22 grant
DK168873B1 (en) 1994-06-27 grant
ES2031099T3 (en) 1992-12-01 grant
US4804883A (en) 1989-02-14 grant
DE3629996A1 (en) 1988-03-17 application
DE3629996C2 (en) 1991-07-18 grant
DK457387A (en) 1988-03-04 application

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