Cathode ray tube screens

A cathode ray tube comprises an envelope (1) having a screen (3) of a single crystalline or polycrystalline material such as yttrium aluminium garnet. Dopants such as Tb <->, Eu <->, Ce <-> or Tm <-> are implanted to different depths or in different areas (7, 10) of the scree...

Full description

Saved in:
Bibliographic Details
Main Authors ROBBINS, DAVID JOHN, COCKAYNE, BRIAN, GLASPER, JOHN LEWIS
Format Patent
LanguageEnglish
French
German
Published 22.12.1982
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
Online AccessGet full text

Cover

More Information
Summary:A cathode ray tube comprises an envelope (1) having a screen (3) of a single crystalline or polycrystalline material such as yttrium aluminium garnet. Dopants such as Tb <->, Eu <->, Ce <-> or Tm <-> are implanted to different depths or in different areas (7, 10) of the screen. Annealing the screen removes lattice damage caused by the implanting. Multicolour luminescence is obtained by scanning an electron beam over the differently doped areas (7, 10), or by varying the electron beam energy as it scans.
Bibliography:Application Number: EP19820302090