Communications: electrical – Continuously variable indicating – With meter reading
Patent
1990-12-21
1991-08-27
Olms, Douglas W.
Communications: electrical
Continuously variable indicating
With meter reading
34082581, 340784, 35821311, H04Q 342, H04N 104
Patent
active
050437194
ABSTRACT:
A matrix circuit has a plurality of blocks each including a plurality of semiconductor unit elements, the semiconductor unit elements of each block being adapted to be impressed with a predetermined voltage at the same time, each unit element becoming active when impressed with the predetermined voltage, and a drive device for impressing the predetermined voltage to the plurality of blocks sequentially. The matrix circuit includes a first selective device for selecting either ground or a desired other than ground voltage, and a second selective device for selecting one of the output of the drive device and the output of the first selective device whereby the output of the second selective device renders active the plurality of unit elements of each block.
REFERENCES:
patent: 3824580 (1974-07-01), Bringol
patent: 4020293 (1977-04-01), Ashley
patent: 4044345 (1977-08-01), Ueda
patent: 4453187 (1984-06-01), Komiya et al.
Lynch, R. J., "Solid State Electroluminescent Display and Scanning Apparatus." IBM Technical Disclosure Bulletin, vol. 9, No. 12, May 1967, pp. 1799-1801.
Hatanaka Katsunori
Komatsu Toshiyuki
Kuroda Yasuo
Nakagawa Katsumi
Seito Shinichi
Canon Kabushiki Kaisha
Olms Douglas W.
Smith Ralph E.
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