U.S. Philips Corporation

Johannes M Spruyt

Antonius W Van Der Heijden

Jorg Brambring

A color display tube includes in an evacuated envelope, an electron gun system for producing three electron beams directed onto a display window. For each electron beam the electron gun system is provided with a cathode which is secured in a cup-shaped control grid having an aperture. The control grids are secured to a cup-shaped anode by means of a plate of electrically insulating material. The electron gun system may be constructed with a focusing electrode which is common for the three electron beams and a common accelerating electrode. A sleeve-shaped electrode may be secured to the anode and the focusing electrode is secured thereto by means of a ring of electrically insulating material.

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Eindhoven, Netherlands

Johannes M Spruyt