Device cathode with extractor grid for display

Details Device cathode with extractor grid for display Device cathode with extractor grid for display

1997-07-02

1999-03-30

Pascal, Rober

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

313497, 345 74, H01J 130

Patent

active

058893725

ABSTRACT:
A display device includes field emission cathode apparatus for emitting electrons. A plurality of electron beams are formed from the field emission cathode apparatus. A screen, which has a phosphor coating facing the cathode receives the plurality of electron beams. The phosphor coating includes a plurality of pixels each corresponding to a different one of said plurality of electron beams. A grid electrode is disposed between the cathode and the screen for controlling the flow of electrons from the cathode. The field emission cathode includes extractor grid means, having a plurality of separately addressable portions associated with each of said plurality of pixels. A gamma transfer function between input data value and beam current is provided in order to emulate a conventional CRT. This can be achieved by use of a lookup table.

REFERENCES:
patent: 4577133 (1986-03-01), Wilson
patent: 4763187 (1988-08-01), Biberian
patent: 5153483 (1992-10-01), Kishino et al.
patent: 5227691 (1993-07-01), Murai et al.
patent: 5402041 (1995-03-01), Kishino et al.
patent: 5541473 (1996-07-01), Duboc, Jr. et al.
patent: 5654607 (1997-08-01), Yamaguchi et al.

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