EP1147543B1 - Tube neck for cathode-ray tube - Google Patents

Tube neck for cathode-ray tube Download PDF

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Publication number
EP1147543B1
EP1147543B1 EP99964456A EP99964456A EP1147543B1 EP 1147543 B1 EP1147543 B1 EP 1147543B1 EP 99964456 A EP99964456 A EP 99964456A EP 99964456 A EP99964456 A EP 99964456A EP 1147543 B1 EP1147543 B1 EP 1147543B1
Authority
EP
European Patent Office
Prior art keywords
tube
tube neck
cathode
cylinder
ray tube
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
EP99964456A
Other languages
German (de)
French (fr)
Other versions
EP1147543A1 (en
Inventor
Klaus Burkhardt
Wolfgang Eckhardt
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1147543A1 publication Critical patent/EP1147543A1/en
Application granted granted Critical
Publication of EP1147543B1 publication Critical patent/EP1147543B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • 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

Definitions

  • the invention relates to a tube neck for a cathode ray tube out non-conductive material, especially ceramic.
  • the invention further relates to a cathode ray tube.
  • Conventional cathode ray tubes are usually with one Provided tube neck, which consists of glass and a metal Has anode and a metal focusing cylinder.
  • the anode and focusing cylinders are part of it a known electron beam generator, which also a cathode, a control grid and a control grid subordinate screen grid includes.
  • the focusing cylinder Especially in High resolution monitors require the focusing cylinder to be arranged centrally in the anode cylinder in order to to ensure sufficient image sharpness.
  • German patent application 198 24 783.4 describes an electrode arrangement proposed, which comprises several electrodes and as an electron gun for focusing an electron beam serves.
  • This electrode arrangement is monolithic made up of several ceramic layers.
  • the present invention is based on the object To create a tube neck of the type mentioned, which improved image sharpness and improved high-voltage flashover behavior the tube.
  • an anode and a focusing cylinder at the same time forms, the inside of the anode cylinder and the inside and Outside of the focusing cylinder with an electrically conductive Material is coated.
  • Tube neck with a recess which has a connection for applying a focusing voltage.
  • connection provided with an opening through which in the A cathode ray tube can create a vacuum.
  • a glass bulb 1 a cathode ray tube essentially comprises one Tube neck 2, a funnel-shaped part 3, the one Anode terminal 4, and one with a luminescent layer 5 provided tube bottom 6.
  • An inner coating of the glass bulb 1 consists of an electrically conductive covering, for. B. from an aluminum layer 7 which is used to derive the from a Cathode 8 on the luminous layer 5 emitted electrons serves, and from an outer coating of a graphite layer 9. Place the graphite layer 9 and the aluminum layer 7 represents a capacitor which is used to smooth the anode voltage serves.
  • the tube neck 2 is an electron gun arranged, which is the cathode 8, a control grid 10, a screen grid 11 arranged downstream of the control grid 10 and a focusing device 12.
  • the tube neck 2 is with a focusing cylinder made of sheet metal parts 13 and an anode cylinder 14 provided on connections 15 is connected to the aluminum layer 7.
  • FIG. 1 in which a cylindrical Tube neck 16 made of ceramic material in one Side view is shown.
  • the tube neck 16 has one essentially conical recess 17, which is provided with a metallic layer.
  • This metallic layer it is possible to have a focusing voltage to apply to a focusing cylinder of the tube neck 16.
  • a ball 18 is in the conical recess 17 can be used after an evacuation of the cathode ray tube the tube is sealed vacuum-tight.
  • FIGS. 2 and 3 show the representation of the section A-A 'and Figure 3 is a perspective View of the tube neck 16 according to Figure 1. Die in the Figures 1, 2 and 3 are the same parts with the same reference numerals Mistake.
  • the tube neck 16 comprises a focusing cylinder 19 and an anode cylinder 20, of which the Anode cylinder 20 on its inside and the focusing cylinder 19 on the inside and outside with one electrically conductive material 21 is coated.
  • the usage of ceramic material for the manufacture of the tube neck 16 enables simple production of flat surfaces the focusing and anode cylinders 19, 20, which means that such a tube neck in a cathode ray tube very good image sharpness.
  • the side faces the recess 17 are also electrical with this conductive material 21 coated on the Focusing cylinder 19 can be supplied with a focusing voltage.
  • the tube neck 16 is with a in the German patent application 198 24 783.4 proposed ceramic electrode arrangement 22 provided for focusing the electron beam is provided.
  • a cylindrical ceramic End cap 23 is used for the vacuum-tight cover of the Tube neck and the cathode ray tube.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

In order to improve the definition and the breakdown behavior in a tube neck (16) that includes an anode cylinder (20) and a focusing cylinder (19), the tube neck (16) is made of a non-conductive material, particularly a ceramic. The inner surface of the anode cylinder (20) and the inner surface and the outer surface of the focusing cylinder (19) are coated with an electrically conductive material (21).

Description

Die Erfindung betrifft einen Röhrenhals für eine Kathodenstrahlröhre aus nichtleitendem Material, insbesondere aus Keramik. Ferner betrifft die Erfindung eine Kathodenstrahlröhre.The invention relates to a tube neck for a cathode ray tube out non-conductive material, especially ceramic. The invention further relates to a cathode ray tube.

Konventionelle Kathodenstrahlröhren sind gewöhnlich mit einem Röhrenhals versehen, welcher aus Glas besteht und einen metallenen Anoden- und einen metallenen Fokussierzylinder aufweist. Der Anoden- und der Fokussierzylinder sind Bestandteil eines an sich bekannten Elektronenstrahlerzeugers, welcher ferner eine Kathode, ein Steuergitter und ein diesem Steuergitter nachgeordnetes Schirmgitter umfaßt. Insbesondere in hochauflösenden Monitoren ist es erforderlich, den Fokussierzylinder zentrisch in dem Anodenzylinder anzuordnen, um eine ausreichende Bildschärfe zu gewährleisten.Conventional cathode ray tubes are usually with one Provided tube neck, which consists of glass and a metal Has anode and a metal focusing cylinder. The anode and focusing cylinders are part of it a known electron beam generator, which also a cathode, a control grid and a control grid subordinate screen grid includes. Especially in High resolution monitors require the focusing cylinder to be arranged centrally in the anode cylinder in order to to ensure sufficient image sharpness.

In der deutschen Patentanmeldung 198 24 783.4 wird eine Elektrodenanordnung vorgeschlagen, welche mehrere Elekroden umfaßt und als Elektronenkanone zur Fokussierung eines Elektronenstrahls dient. Diese Elektrodenanordnung ist monolithisch aus mehreren Keramiklagen aufgebaut.German patent application 198 24 783.4 describes an electrode arrangement proposed, which comprises several electrodes and as an electron gun for focusing an electron beam serves. This electrode arrangement is monolithic made up of several ceramic layers.

Dokument US 3,383,537 offenbart einen Röhrenhals gemäß dem Oberbegriff des Anspruchs 1.Document US 3,383,537 discloses a tube neck according to the preamble of claim 1.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Röhrenhals der eingangs genannten Art zu schaffen, welcher eine verbesserte Bildschärfe und ein verbessertes Hochspannungs-Überschlagsverhalten der Röhre ermöglicht.The present invention is based on the object To create a tube neck of the type mentioned, which improved image sharpness and improved high-voltage flashover behavior the tube.

Diese Aufgabe wird dadurch gelöst, daß der Röhrenhals. gleichzeitig einen Anoden - und einem Fokussierzylinder bildet, wobei die Innenseite des Anodenzylinders und die Innen- und Außenseite des Fokussierzylinders mit einem elektrisch leitenden Material beschichtet ist. This object is achieved in that the tube neck. an anode and a focusing cylinder at the same time forms, the inside of the anode cylinder and the inside and Outside of the focusing cylinder with an electrically conductive Material is coated.

In einer vorteilhaften Ausgestaltung der Erfindung ist der Röhrenhals mit einer Ausnehmung versehen, welche einen Anschluß zum Anlegen einer Fokussierspannung aufweist.In an advantageous embodiment of the invention Tube neck with a recess, which has a connection for applying a focusing voltage.

In einer weiteren Ausgestaltung der Erfindung ist der Anschluß mit einer Öffnung versehen, durch welche in der Kathodenstrahlröhre ein Vakuum erzeugt werden kann.In a further embodiment of the invention, the connection provided with an opening through which in the A cathode ray tube can create a vacuum.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den weiteren Unteransprüchen.Further advantageous embodiments of the invention result itself from the further subclaims.

Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung veranschaulicht ist, werden im folgenden die Erfindung, deren Ausgestaltungen sowie Vorteile näher erläutert.Based on the drawing, in which an embodiment of the Invention is illustrated, the following are the invention, their designs and advantages explained in more detail.

Es zeigen

Figuren 1 bis 3
einen Röhrenhals in einer Seitenansicht, in einer Schnittdarstellung und in einer perspektivischen Ansicht und
Figur 4
eine Prinzipdarstellung einer an sich bekannten Kathodenstrahlröhre.
Show it
Figures 1 to 3
a tube neck in a side view, in a sectional view and in a perspective view and
Figure 4
a schematic diagram of a known cathode ray tube.

Es wird zunächst auf Figur 4 verwiesen. Ein Glaskolben 1 einer Kathodenstrahlröhre umfaßt im wesentlichen einen Röhrenhals 2, einen trichterförmigen Teil 3, der einen Anodenanschluß 4 aufweist, und einen mit einer Leuchtschicht 5 versehenen Röhrenboden 6. Ein innerer Belag des Glaskolbens 1 besteht aus einem elektrisch leitenden Belag, z. B. aus einer Aluminiumschicht 7, die zur Ableitung der von einer Kathode 8 auf die Leuchtschicht 5 ausgesendeten Elektronen dient, und aus einem äußeren Belag aus einer Graphitschicht 9. Die Graphitschicht 9 und die Aluminiumschicht 7 stellen einen Kondensator dar, welcher zur Glättung der Anodenspannung dient. Im Röhrenhals 2 ist ein Elektronenstrahlerzeuger angeordnet, welcher die Kathode 8, ein Steuergitter 10, ein dem Steuergitter 10 nachgeordnetes Schirmgitter 11 sowie eine Fokussiereinrichtung 12 umfaßt. Der Röhrenhals 2 ist mit einem aus Blechteilen hergestellten Fokussierzylinder 13 und einem Anodenzylinder 14 versehen, welcher an Anschlüssen 15 mit der Aluminiumschicht 7 verbunden ist.Reference is first made to FIG. 4. A glass bulb 1 a cathode ray tube essentially comprises one Tube neck 2, a funnel-shaped part 3, the one Anode terminal 4, and one with a luminescent layer 5 provided tube bottom 6. An inner coating of the glass bulb 1 consists of an electrically conductive covering, for. B. from an aluminum layer 7 which is used to derive the from a Cathode 8 on the luminous layer 5 emitted electrons serves, and from an outer coating of a graphite layer 9. Place the graphite layer 9 and the aluminum layer 7 represents a capacitor which is used to smooth the anode voltage serves. In the tube neck 2 is an electron gun arranged, which is the cathode 8, a control grid 10, a screen grid 11 arranged downstream of the control grid 10 and a focusing device 12. The tube neck 2 is with a focusing cylinder made of sheet metal parts 13 and an anode cylinder 14 provided on connections 15 is connected to the aluminum layer 7.

Im folgenden wird auf Figur 1 verwiesen, in welcher ein zylindrischer Röhrenhals 16 aus keramischem Material in einer Seitenansicht dargestellt ist. Der Röhrenhals 16 weist eine im wesentlichen konisch ausgebildete Ausnehmung 17 auf, welche mit einer metallischen Schicht versehen ist. Durch diese metallische Schicht ist es möglich, eine Fokussierspannung an einen Fokussierzylinder des Röhrenhalses 16 anzulegen. In die konische Ausnehmung 17 ist eine Kugel 18 einsetzbar, die nach einer Evakuierung der Kathodenstrahlröhre die Röhre vakuumdicht verschließt.In the following, reference is made to FIG. 1, in which a cylindrical Tube neck 16 made of ceramic material in one Side view is shown. The tube neck 16 has one essentially conical recess 17, which is provided with a metallic layer. By this metallic layer it is possible to have a focusing voltage to apply to a focusing cylinder of the tube neck 16. A ball 18 is in the conical recess 17 can be used after an evacuation of the cathode ray tube the tube is sealed vacuum-tight.

Im folgenden wird auf Figur 2 und 3 verwiesen. Figur 2 zeigt die Darstellung des Schnitts A-A' und Figur 3 eine perspektivische Ansicht des Röhrenhalses 16 gemäß Figur 1. Die in den Figuren 1, 2 und 3 gleichen Teile sind mit gleichen Bezugszeichen versehen. Der Röhrenhals 16 umfaßt einen Fokussierzylinder 19 und einen Anodenzylinder 20, von denen der Anodenzylinder 20 auf seiner Innenseite und der Fokussierzylinder 19 auf seiner Innen- und seiner Außenseite mit einem elektrisch leitenden Material 21 beschichtet ist. Die Verwendung von keramischem Material zur Herstellung des Röhrenhalses 16 ermöglicht eine einfache Fertigung planer Oberflächen der Fokussier- und Anodenzylinder 19, 20, was bedeutet, daß ein derartiger Röhrenhals in einer Kathodenstrahlröhre eine sehr gute Bildschärfe bewirkt. Die Seitenflächen der Ausnehmung 17 sind ebenfalls mit diesem elektrisch leitenden Material 21 beschichtet, über das dem Fokussierzylinder 19 eine Fokussierspannung zuführbar ist. Der Röhrenhals 16 ist mit einer in der deutschen Patentanmeldung 198 24 783.4 vorgeschlagenen keramischen Elektrodenanordnung 22 versehen, die zur Fokussierung des Elektronenstrahls vorgesehen ist. Eine zylindrische keramische Abschlußkappe 23 dient der vakuumdichten Abdeckung des Röhrenhalses und der Kathodenstrahlröhre.In the following, reference is made to FIGS. 2 and 3. Figure 2 shows the representation of the section A-A 'and Figure 3 is a perspective View of the tube neck 16 according to Figure 1. Die in the Figures 1, 2 and 3 are the same parts with the same reference numerals Mistake. The tube neck 16 comprises a focusing cylinder 19 and an anode cylinder 20, of which the Anode cylinder 20 on its inside and the focusing cylinder 19 on the inside and outside with one electrically conductive material 21 is coated. The usage of ceramic material for the manufacture of the tube neck 16 enables simple production of flat surfaces the focusing and anode cylinders 19, 20, which means that such a tube neck in a cathode ray tube very good image sharpness. The side faces the recess 17 are also electrical with this conductive material 21 coated on the Focusing cylinder 19 can be supplied with a focusing voltage. The tube neck 16 is with a in the German patent application 198 24 783.4 proposed ceramic electrode arrangement 22 provided for focusing the electron beam is provided. A cylindrical ceramic End cap 23 is used for the vacuum-tight cover of the Tube neck and the cathode ray tube.

Claims (6)

  1. Tube neck for a cathode-ray tube made from nonconductive material, in particular ceramic material, characterised in that the tube neck simultaneously forms an anode cylinder and a focussing cylinder, with the inside of the anode cylinder (20) and the inside and the outside of the focussing cylinder (19) being coated with an electrically conductive material (21).
  2. Tube neck according to claim 1, characterised in that the tube neck (16) is provided with a recess (17) which has a connection for the application of a focussing voltage.
  3. Tube neck according to claim 2, characterised in that the connection has an opening for evacuating the cathode-ray tube.
  4. Tube neck according to claim 2, characterised in that the recess (17) is formed in a substantially conical manner and is provided with a metallic layer (21) for the application of a focussing voltage.
  5. Tube neck according to claim 4, characterised in that a substantially spherical sealing means (18) can be inserted into the recess (17) in order to seal the cathode-ray tube in a vacuum-tight manner.
  6. Cathode-ray tube having a tube neck according to one of claims 1 to 5.
EP99964456A 1998-12-28 1999-12-21 Tube neck for cathode-ray tube Expired - Lifetime EP1147543B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29823118U DE29823118U1 (en) 1998-12-28 1998-12-28 Tube neck for a cathode ray tube
DE29823118U 1998-12-28
PCT/DE1999/004061 WO2000039834A1 (en) 1998-12-28 1999-12-21 Tube neck for cathode-ray tube

Publications (2)

Publication Number Publication Date
EP1147543A1 EP1147543A1 (en) 2001-10-24
EP1147543B1 true EP1147543B1 (en) 2004-05-06

Family

ID=8067233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99964456A Expired - Lifetime EP1147543B1 (en) 1998-12-28 1999-12-21 Tube neck for cathode-ray tube

Country Status (6)

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US (1) US6504296B2 (en)
EP (1) EP1147543B1 (en)
JP (1) JP2003529890A (en)
AT (1) ATE266255T1 (en)
DE (2) DE29823118U1 (en)
WO (1) WO2000039834A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7164629B2 (en) * 2002-01-22 2007-01-16 Ricoh Company, Ltd. Method of controlling an optical disk apparatus
US6891321B2 (en) * 2002-11-12 2005-05-10 Ge Medical Systems Global Technology Company, Llc Oil-free electron source having cathode and anode members adjustable with five degrees of freedom
US6952466B2 (en) * 2002-11-12 2005-10-04 Ge Medical Systems Global Technology Company, Llc Oil-free electron source for an EBT scanner

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383537A (en) * 1965-10-07 1968-05-14 Rank Organisation Ltd Metal/ceramic cathode ray tube
NL7208728A (en) * 1971-07-28 1973-12-28
DE2649617A1 (en) 1975-10-31 1977-05-12 Nippon Telegraph & Telephone Travelling electron wave tube with annular electrodes - has internal taper and channelling electrode to reduce arcing due to gas ionisation
GB1598888A (en) 1978-05-30 1981-09-23 Philips Electronic Associated Electron display tubes
NL7809345A (en) * 1978-09-14 1980-03-18 Philips Nv CATHED BEAM TUBE.
US4350925A (en) 1980-07-09 1982-09-21 Rca Corporation Main lens assembly for an electron gun
US4585976A (en) * 1982-01-19 1986-04-29 Hewlett-Packard Company Beam penetration CRT with internal automatic constant deflection factor and pattern correction
JPS60182646A (en) 1984-02-29 1985-09-18 Nec Corp Electron gun electrode structure
JPS60218743A (en) * 1984-04-13 1985-11-01 Nec Corp Electron gun electrode structure
JP2542627B2 (en) 1987-08-05 1996-10-09 株式会社東芝 Color picture tube device
US5894190A (en) * 1996-03-22 1999-04-13 Hitachi, Ltd. Color cathode ray tube having a large-diameter lens
DE19824783A1 (en) 1998-06-03 1999-12-16 Siemens Ag Device for forming an electron beam, method for producing the device and application

Also Published As

Publication number Publication date
WO2000039834A1 (en) 2000-07-06
US6504296B2 (en) 2003-01-07
DE29823118U1 (en) 1999-02-25
US20020003395A1 (en) 2002-01-10
JP2003529890A (en) 2003-10-07
ATE266255T1 (en) 2004-05-15
EP1147543A1 (en) 2001-10-24
DE59909428D1 (en) 2004-06-09

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