(19)
(11) EP 0 001 673 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.05.1979 Bulletin 1979/10

(43) Date of publication A2:
02.05.1979 Bulletin 1979/09

(21) Application number: 78200260

(22) Date of filing: 23.10.1978
(84) Designated Contracting States:
BE DE FR GB NL

(30) Priority: 26.10.1977 NL 7711713

(71) Applicant: N.V. Philips' Gloeilampenfabrieken
 ()

(72) Inventor:
  • Plukker, Gerardus Wilhelmus
     ()

   


(54) Colour selection electrode with elongate apertures in a colour display tube


(57) By using in a colour display tube a colour selection electrode comprising a metal plate having a large number of rows of apertures which are separated from each other by bridges and are elongate in the direction of the rows, which rows extend in the direction of the phosphor lines on the display screen and in which the last aperture at the two ends of each row is at least as long as the penultimate aperture at the two ends of each row and the short sides of the last aperture of all rows situated at the extreme ends are situated on curved lines which follow the edge of the colour selection electrode, a smooth picture edge and also a good adhesion of the ends of the phosphor lines to the display window are obtained.







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