Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1996-11-19
1999-04-27
Mengistu, Amare
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
345204, G09G 500
Patent
active
058984283
ABSTRACT:
A transmission line tap for a field emission display includes a driving circuit formed from a charging and clearing circuit and a storage circuit. In one embodiment, the charging and clearing circuit is a single transistor coupled between a supply voltage and the storage circuit. The storage circuit is a single storage capacitor coupled between the transistor and the reference potential. In another embodiment, the charging and clearing circuit is formed from three transistors and an intermediate capacitor, and the storage circuit is formed from a storage capacitor and an output buffer. In either embodiment, pulses of an input voltage selectively charge the storage capacitor to a fixed voltage. The driving circuit then drives a column line of an emitter substrate in response to the storage capacitor. In the first embodiment, the storage capacitor is cleared by pulsing the supply voltage. In the second embodiment, the charging and clearing circuit is self-clearing such that no pulse of the supply voltage is required. Each embodiment is driven by a transmission line using constructively interfered pulses to establish the input voltage.
REFERENCES:
patent: 4651149 (1987-03-01), Takeda et al.
patent: 4654649 (1987-03-01), Kojima et al.
patent: 5404081 (1995-04-01), Kane et al.
patent: 5519414 (1996-05-01), Gold et al.
patent: 5528256 (1996-06-01), Erhart et al.
patent: 5633600 (1997-05-01), Ohnishi
Hall Garrett W.
Zimlich David A.
Mengistu Amare
Micron Display Technology Inc.
Osorio Ricardo
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