Communications: electrical – Continuously variable indicating – With meter reading
Patent
1984-01-19
1987-01-13
Curtis, Marshall M.
Communications: electrical
Continuously variable indicating
With meter reading
340784, 340718, G09G 300
Patent
active
046367888
ABSTRACT:
A field effect display system is comprised of a control system and display circuitry. The display circuitry includes an m by n array of field effect picture elements, a plurality of associated diode arrays respectively coupled to the array of field effect picture elements and diode decoder circuitry selectively coupled to the plurality of diode arrays. The control system is controlled by a microcomputer to selectively develop P-column address, N-column address and row address signals in P and N modes of operation. Drive decoder circuitry in the control system is responsive to each row address selectively generated during either a P- or an N-mode of operation for selectively causing an associated one of m drive circuits to enable all of the field effect picture elements in an associated one of m rows of field effect picture elements. During the P-mode of operation, the diode decoder circuitry is selectively responsive to the P-column addresses for selectively causing each of the selectively enabled picture elements to be electrically charged in a first direction through their respective associated diode arrays. During the N-mode of operation, the diode decoder circuitry is selectively responsive to the N-column addresses for selectively causing each of the selectively enabled picture elements to be electrically charged in a second direction through their respective associated diode arrays.
REFERENCES:
patent: 3532813 (1970-10-01), Lechner
patent: 4065764 (1977-12-01), Houryu
patent: 4110663 (1978-08-01), Miyazaki et al.
patent: 4237456 (1980-12-01), Kanatani
patent: 4251136 (1981-02-01), Miner et al.
patent: 4297695 (1981-10-01), Marshall
patent: 4485379 (1984-11-01), Kinoshita et al.
Curtis Marshall M.
Kovalick Vincent P.
NCR Corporation
Sessler Jr. Albert L.
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