Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1993-06-04
1999-11-16
Mengistu, Amare
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
313293, 313422, 315366, G09G 322
Patent
active
059866276
ABSTRACT:
Flat-panel type picture display device having a luminescent screen and a large number of electron propagation ducts operating by means of electron wall interaction. Electrons are withdrawn from the ducts by means of an addressing system, whereafter these electrons are directed towards desired locations on the luminescent screen. An apertured spacer plate of electrically insulating material for passing electrons is arranged between the addressing system and the screen. To enable large voltage differences to be applied across the dimension of thickness of the spacer plate, the spacer plate is provided with a high-ohmic layer, or with a pattern of a low-ohmic material, or with an equalization layer at one side and with a low-ohmic layer at the other side, and at least the walls of the apertures are preferably coated with a material having a low secondary emission.
REFERENCES:
patent: 3935500 (1976-01-01), Oess et al.
patent: 4174523 (1979-11-01), Marlowe et al.
patent: 5015912 (1991-05-01), Spindt et al.
patent: 5313136 (1994-05-01), Van Gorkom et al.
De Zwart Siebe T.
Hendriks Bernardus H. W.
Lambert Nicolaas
Trompenaars Petrus H. F.
Van Gorkom Gerardus G. P.
Kraus Robert J.
Mengistu Amare
U.S. Philips Corporation
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