DE3703055A1 - Cathode-ray tube with phosphor screen - Google Patents

Cathode-ray tube with phosphor screen

Info

Publication number
DE3703055A1
DE3703055A1 DE19873703055 DE3703055A DE3703055A1 DE 3703055 A1 DE3703055 A1 DE 3703055A1 DE 19873703055 DE19873703055 DE 19873703055 DE 3703055 A DE3703055 A DE 3703055A DE 3703055 A1 DE3703055 A1 DE 3703055A1
Authority
DE
Germany
Prior art keywords
ray tube
pigment
cathode
cathode ray
phosphor screen
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
DE19873703055
Other languages
German (de)
Other versions
DE3703055C2 (en
Inventor
Reinhard Welzel
Hermann Dr Rer Nat Widmann
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19873703055 priority Critical patent/DE3703055C2/en
Publication of DE3703055A1 publication Critical patent/DE3703055A1/en
Application granted granted Critical
Publication of DE3703055C2 publication Critical patent/DE3703055C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • H01J29/02—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
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers
    • 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
    • H01J29/26—Luminescent screens with superimposed luminescent layers

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

A mixture of Fe2O3 and BaSO4 is proposed as a test raster material which can be illuminated with floodlight for a cathode-ray tube.

Description

Die vorliegende Erfindung betrifft eine Kathodenstrahl­ röhre nach dem Oberbegriff des Patentanspruchs 1.The present invention relates to a cathode ray tube according to the preamble of claim 1.

Bei Kathodenstrahlröhren, wie z. B. Oszillographenröh­ ren für Meßzwecke werden auf der Innenfläche des Leuchtschirmträgers durch seitlich einfallendes Flut­ licht beleuchtbare Meßraster aufgebracht. Die Aufbrin­ gung geschieht vorwiegend auf fotochemischem Wege.In cathode ray tubes, such as. B. Oscillograph tube Ren for measuring purposes are on the inner surface of the Illuminated screen holder due to flooding from the side Light-illuminable measuring grid applied. The Aufbrin The process mainly takes place in a photochemical way.

Um einerseits eine große Helligkeit und andererseits einen guten Kontrast zu erzielen, besteht das Meßra­ stermaterial zweckmäßig aus zwei anorganischen Pigmenten, einem Kontrast- oder Farbpigment und einem Weißpigment, das über Lichtstreuung die Helligkeit des Rasters verbessert. Die Helligkeit und die Fähigkeit durch seitlich einfallendes Flutlicht aufzuleuchten, wird wesentlich beeinflußt durch die Packungsdichte und den optischen Kontakt zwischen den Pigmenten und dem Leuchtschirmträger, der üblicherweise aus Glas besteht. To a great brightness on the one hand and on the other hand To achieve a good contrast, there is the Meßra stere material expediently from two inorganic pigments, a contrast or color pigment and a white pigment, that via light scattering the brightness of the grid improved. The brightness and ability through to illuminate the floodlight from the side significantly influenced by the packing density and the optical contact between the pigments and the Illuminated screen support, which usually consists of glass.  

Als Weißpigment wird häufig Titandioxyd verwendet.Titanium dioxide is often used as the white pigment.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Flutlichtbeleuchtbarkeit des Meßrastermaterials zu verbessern.The present invention is based on the object the floodlight illuminability of the measuring grid material increases improve.

Diese Aufgabe wird durch die im Kennzeichen des Patent­ anspruchs 1 angegebenen Merkmale gelöst.This task is accomplished by the in the hallmark of the patent claims 1 specified features solved.

Die Verwendung von Bariumsulfat (BaSO4) ergibt eine sehr hohe Packungsdichte infolge seines hohen spezifi­ schen Gewichtes und eine außerordentlich gute Licht­ streuung infolge seiner rein weißen Körperfarbe. Einen besonders guten optischen Kontakt zwischen Bariumsulfat als Weißpigment und einem Kontrastpigment ergibt sich, wenn als Kontrastpigment ein Rotpigment, insbesondere Fe2O3 verwendet wird. Aus einem Gemisch von Fe2O3 und BaSO4 bestehende Meßraster ergibt eine unerwartet hoher Helligkeit bei Flutlichtbeleuchtung.The use of barium sulfate (BaSO 4 ) results in a very high packing density due to its high specific weight and an extremely good light scattering due to its pure white body color. A particularly good optical contact between barium sulfate as white pigment and a contrast pigment is obtained if a red pigment, in particular Fe 2 O 3 , is used as the contrast pigment. A measurement grid consisting of a mixture of Fe 2 O 3 and BaSO 4 results in an unexpectedly high brightness in floodlighting.

Eine weitere Verbesserung ergibt sich, wenn man eine innige Verbindung der beiden Pigmente in der Weise bewirkt, daß man das eine Pigment mit dem anderen ummantelt.Another improvement comes from having one intimate connection of the two pigments in the way causes one pigment to be mixed with the other encased.

Claims (4)

1. Kathodenstrahlröhre mit einem Leuchtschirm, dessen gläserner Leuchtschirmträger mit einem durch seitlich einfallendes Flutlich beleuchtbaren Meßraster auf seiner Innenfläche versehen ist, das aus einem farbigen Kontrastpigment und einem Weißpigment besteht, dadurch gekennzeichnet, daß das Weißpigment BaSO4 ist.1. cathode ray tube with a luminescent screen, the glass luminescent screen support is provided with a measurement grid on its inner surface which can be illuminated by floodlight coming from the side, which consists of a colored contrast pigment and a white pigment, characterized in that the white pigment is BaSO 4 . 2. Kathodenstrahlröhre nach Anspruch 1, dadurch ge­ kennzeichnet, daß das Kontrastpigment ein Rotpigment, insbesondere Fe2O3 ist.2. A cathode ray tube according to claim 1, characterized in that the contrast pigment is a red pigment, in particular Fe 2 O 3 . 3. Kathodenstrahlröhre nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß die beiden Pigmente gleichmäßig miteinander vermischt sind.3. A cathode ray tube according to claim 1 or claim 2, characterized in that the two pigments are evenly mixed together. 4. Kathodenstrahlröhre nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß jeweils ein Pigment mit dem anderen zumindest teilweise ummantelt ist.4. A cathode ray tube according to one of claims 1 to 3, characterized in that each with a pigment the other is at least partially encased.
DE19873703055 1987-02-03 1987-02-03 Cathode ray tube with fluorescent screen Expired - Fee Related DE3703055C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873703055 DE3703055C2 (en) 1987-02-03 1987-02-03 Cathode ray tube with fluorescent screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873703055 DE3703055C2 (en) 1987-02-03 1987-02-03 Cathode ray tube with fluorescent screen

Publications (2)

Publication Number Publication Date
DE3703055A1 true DE3703055A1 (en) 1988-08-11
DE3703055C2 DE3703055C2 (en) 1995-05-24

Family

ID=6320055

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873703055 Expired - Fee Related DE3703055C2 (en) 1987-02-03 1987-02-03 Cathode ray tube with fluorescent screen

Country Status (1)

Country Link
DE (1) DE3703055C2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3407106A1 (en) * 1984-02-28 1985-08-29 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Luminescent screen for a cathode ray tube and production method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3407106A1 (en) * 1984-02-28 1985-08-29 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Luminescent screen for a cathode ray tube and production method

Also Published As

Publication number Publication date
DE3703055C2 (en) 1995-05-24

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Legal Events

Date Code Title Description
8120 Willingness to grant licenses paragraph 23
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee