Flat-panel type picture display device with electron transport d

Details Flat-panel type picture display device with electron transport d Flat-panel type picture display device with electron transport d

1995-06-28

1997-06-10

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313495, 3151691, H01J 2970, H01J 0162, H01J 6304, G09G 0310

Patent

active

056379544

ABSTRACT:
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 plate adjoined by a large number of electron transport ducts operating by means of wall interaction of electrons. An active selection structure for directing electrons from transport ducts towards pixels on the luminescent screen comprises an apertured preselection plate and an apertured fine-selection plate, each preselection aperture being associated with at least two fine-selection apertures. Special auxiliary (or dummy) electrodes between the preselection plate and the selection plate, and/or a special geometry of the preselection apertures ensure that colour purity and contrast are maximal.

REFERENCES:
patent: 5347199 (1994-09-01), Van Gorkom et al.
patent: 5489815 (1996-02-01), Van Gorkom et al.

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