EP0516218A1 - Elektronenstrahlröhre mit Bildfenster - Google Patents

Elektronenstrahlröhre mit Bildfenster Download PDF

Info

Publication number
EP0516218A1
EP0516218A1 EP92201429A EP92201429A EP0516218A1 EP 0516218 A1 EP0516218 A1 EP 0516218A1 EP 92201429 A EP92201429 A EP 92201429A EP 92201429 A EP92201429 A EP 92201429A EP 0516218 A1 EP0516218 A1 EP 0516218A1
Authority
EP
European Patent Office
Prior art keywords
cathode ray
ray tube
display window
axis
signxy
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
EP92201429A
Other languages
English (en)
French (fr)
Other versions
EP0516218B1 (de
Inventor
Gijsbertus Bakker
Paul Daamen
Frank Gersmann
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Priority to EP92201429A priority Critical patent/EP0516218B1/de
Publication of EP0516218A1 publication Critical patent/EP0516218A1/de
Application granted granted Critical
Publication of EP0516218B1 publication Critical patent/EP0516218B1/de
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
    • H01J29/861—Vessels or containers characterised by the form or the structure thereof
    • 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
    • H01J2229/8613—Faceplates
    • H01J2229/8616—Faceplates characterised by shape
    • H01J2229/862—Parameterised shape, e.g. expression, relationship or equation

Definitions

  • cathode ray tubes having substantially flat display windows i.e. having display windows with a relatively small average curvature
  • conventional cathode ray tubes exhibit a disturbing distortion of reflections of light sources.
  • Devices in which cathode ray tubes are used are often arranged in rooms which are artificially lit by elongated horizontally arranged light sources which extend parallel to the display window. Examples of such light sources are fluorescent lamps. The most important source of disturbing reflections in such rooms are said elongated light sources.
  • Fig. 3a shows a reflection image 31 of an elongated light source which is arranged parallel to the x-axis, for z xy /signXY ⁇ 0 for the outside surface (Fig. 3a) and for z xy varying over the outside surface such that also positive values of z xy occur (Fig. 3b).
  • a reflection image as shown in Fig. 3b gives the disturbing impression that the display window is very convex.
  • the reflection image as shown in Fig. 3a does not have this disadvantage.
  • a similar effect occurs with elongated light sources which are arranged parallel to the y-axis.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
EP92201429A 1991-05-29 1992-05-20 Elektronenstrahlröhre mit Bildfenster Expired - Lifetime EP0516218B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92201429A EP0516218B1 (de) 1991-05-29 1992-05-20 Elektronenstrahlröhre mit Bildfenster

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
EP91201277 1991-05-29
EP91201277 1991-05-29
EP92200351 1992-02-10
EP92200351 1992-02-10
EP92201429A EP0516218B1 (de) 1991-05-29 1992-05-20 Elektronenstrahlröhre mit Bildfenster

Publications (2)

Publication Number Publication Date
EP0516218A1 true EP0516218A1 (de) 1992-12-02
EP0516218B1 EP0516218B1 (de) 1995-10-25

Family

ID=27234095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92201429A Expired - Lifetime EP0516218B1 (de) 1991-05-29 1992-05-20 Elektronenstrahlröhre mit Bildfenster

Country Status (1)

Country Link
EP (1) EP0516218B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570101A (en) * 1983-09-06 1986-02-11 Rca Corporation Cathode-ray tube having a faceplate panel with a smooth aspherical screen surface
EP0283129A2 (de) * 1987-03-20 1988-09-21 Hitachi, Ltd. Farbbildröhre mit Schattenmaske
FR2634945A1 (fr) * 1988-07-27 1990-02-02 Videocolor Procede de fabrication d'un tube de television en couleurs a haute definition et tube de television trichrome a haute definition
EP0448401A2 (de) * 1990-03-22 1991-09-25 Matsushita Electronics Corporation Kathodenstrahlröhre mit Schattenmaske

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570101A (en) * 1983-09-06 1986-02-11 Rca Corporation Cathode-ray tube having a faceplate panel with a smooth aspherical screen surface
EP0283129A2 (de) * 1987-03-20 1988-09-21 Hitachi, Ltd. Farbbildröhre mit Schattenmaske
FR2634945A1 (fr) * 1988-07-27 1990-02-02 Videocolor Procede de fabrication d'un tube de television en couleurs a haute definition et tube de television trichrome a haute definition
EP0448401A2 (de) * 1990-03-22 1991-09-25 Matsushita Electronics Corporation Kathodenstrahlröhre mit Schattenmaske

Also Published As

Publication number Publication date
EP0516218B1 (de) 1995-10-25

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