Flat screen having individually dipole-protected microdots

Details Flat screen having individually dipole-protected microdots Flat screen having individually dipole-protected microdots

1997-07-14

1999-07-06

Mengistu, Amare

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

257 10, 313500, G09G 322

Patent

active

059202963

ABSTRACT:
A flat screen field emission cathode is disclosed including microtips individually protected by means of a series electrical coupling with a dipole consisting of a depletion mode field effect transistor. The current-voltage characteristic of such a dipole is not linear. These dipoles can be obtained such that the protection threshold and current emission level, and therefore the brilliance of the screen, can be altered globally (on all tips at once) solely by acting on the biasing of the substrate common to these dipoles, or groups of dipoles.

REFERENCES:
patent: 4302764 (1981-11-01), Fang et al.
patent: 4727309 (1988-02-01), Vajdicetal
patent: 4999812 (1991-03-01), Amin
patent: 5407852 (1995-04-01), Ghio et al.
patent: 5508421 (1996-04-01), Palmour
patent: 5585301 (1996-12-01), Lee et al.
patent: 5585673 (1996-12-01), Tomil et al.

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