Plasma display device

Details Plasma display device Plasma display device

1989-08-25

1991-03-19

O'Shea, Sandra L.

Electric lamp and discharge devices

With gas or vapor

Three or more electrode discharge device

340773, 340774, H01J 1749, G09G 322

Patent

active

050013920

ABSTRACT:
A plasma display device and a driving method thereof are disclosed in which cathodes are provided in the form of steps or in the form of depressions and projections to form multistep discharge gaps between the cathodes and anodes, while amplitude modulated pulses, width modulated pulses, or composite width/amplitude modulated pulses are supplied to the cathode or anodes, the pulse amplitudes for the different steps being set in such a manner that the discharges should occur selectively or wholly at the different discharge regions of the different gaps formed by the cathodes. The device of the present invention improves the gray scale to a great extent.

REFERENCES:
patent: 4562434 (1985-12-01), Amano
patent: 4712877 (1987-12-01), Okada et al.

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