(19)
(11) EP 0 446 878 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.03.1992 Bulletin 1992/13

(43) Date of publication A2:
18.09.1991 Bulletin 1991/38

(21) Application number: 91103789.3

(22) Date of filing: 13.03.1991
(51) International Patent Classification (IPC)5: H01J 29/28
(84) Designated Contracting States:
DE FR GB NL

(30) Priority: 14.03.1990 JP 63158/90
28.03.1990 JP 79442/90

(71) Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Kadoma-shi, Osaka-fu, 571 (JP)

(72) Inventors:
  • Otake, Keiichi
    Takatsuki-shi, Osaka-fu (JP)
  • Aikawa, Noboru
    Ibaraki-shi, Osaka-fu (JP)
  • Hosoki, Atsunori
    Kyoto-shi, Kyoto-fu (JP)

(74) Representative: Eisenführ, Speiser & Partner 
Martinistrasse 24
28195 Bremen
28195 Bremen (DE)


(56) References cited: : 
   
       


    (54) Image display element


    (57) In the image display element, where a cathode (2), and a control electrode (3-7) for controlling the electron beams (102) radiated from the cathode are provided within the vacuum cell, a phosphor layer (20) which emits the light by the application of the electron beams, and a metal back layer (101) which is positioned on the phosphor layer (20), is made of aluminum and brings the light emission of the phosphor to the front face (21) by the mirror face effect are provided on the internal face (21) of the face plate for constituting the vacuum cell, the present invention is characterized in that the carbon layer (104) for reducing the generating of the rearward dispersed electrons (103) is provided on the metal back layer (101), and the thickness of the aluminum is adjusted to reduce the rerush of the rearward dispersed electrons (103) as much as possible.






    Search report