Videocolor

Olivier Trinchero

Gerard Proudhon

Jacques Baudry

Electron gun for cathode ray tube, the electrostatic lenses of which comprise an electrode that remains at a high voltage after shut-down of the power supply of the tube, wherein in order to reduce the effect, apparent through an interference glimmer upon the screen on the K cathode of the high voltage remaining on the electrode after shutdown of the power supply, means for masking this voltage are provided that form part of an electron gun electrode of intermediary position between the first high voltage electrode and the cathode, and wherein preferably, the intermediary electrode has an elongated form according to the axis of the gun with two end walls, of which that turned towards the cathode has a greater thickness than the thickness of the opposite wall.

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Lyons, France

Olivier Trinchero