Flat-panel type picture display device

Details Flat-panel type picture display device Flat-panel type picture display device

1994-09-08

1997-04-29

Weldon, Ulysses

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313495, 3133611, 345 75, H01J 2970

Patent

active

056252536

ABSTRACT:
A flat-panel type picture display device having a face plate with a luminescent screen at the inner side and, arranged at a short distance therefrom, a rear wall adjoined by a large number of electron transport ducts operating by means of wall interaction of electrons. A selection structure for withdrawing electrons from transport ducts and for directing them towards pixels on the luminescent screen comprises a preselection structure provided with preselection locations and a fine-selection plate provided with fine-selection apertures, each preselection location being associated with at least two fine-selection apertures. To improve contrast and/or color purity, an apertured obstruction plate forming chicanes in the electron paths is arranged between the preselection plate and the fine-selection plate.

REFERENCES:
patent: 3155826 (1964-11-01), Peters
patent: 3911514 (1975-10-01), Schulz et al.
patent: 4069439 (1978-01-01), Anderson
patent: 4757230 (1988-07-01), Washington et al.
patent: 4879496 (1989-11-01), Knapp et al.
patent: 4881005 (1989-11-01), Morimoto et al.

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