Picture display device with addressing system

Details Picture display device with addressing system Picture display device with addressing system

1998-02-09

1999-11-30

Patel, Ashok

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313495, 313103CM, 313105CM, 345 74, H01J 2970, G09G 322

Patent

active

059948280

ABSTRACT:
Thin-panel picture display device having a luminescent screen and a large emitting plane electron source, such as a large number of juxtaposed electron propagation ducts operating by means of wall interaction of electrons. By means of an addressing system, electrons extracted from ducts are directed towards desired locations on the luminescent screen. The addressing system comprises a preselection system and a fine-selection system with an intermediate spacer plate of insulating material provided with apertures for passing electrons arranged in between. To provide the possibility of applying large voltage differences across the thickness of the spacer plate, the walls of the apertures are at least partly coated with a coating of a low .delta. material having a low secondary emission coefficient (.delta..sub.max .ltoreq.3.5), particularly Si.sub.3 N.sub.4, AlN, Cr.sub.2 O.sub.3 or Y.sub.2 O.sub.3.

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