Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1980-07-08
1983-01-04
Trafton, David L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340813, 350357, G09G 316
Patent
active
043674690
ABSTRACT:
A drive system is provided for driving an electrochromic display cell including an electrochromic material, a predetermined number of display electrodes, and a counter electrode confronting them, different combination of the display electrodes defining different desired display patterns. The drive system comprises a coloration circuit and a bleaching circuit driven at the same time. The coloration circuit is adapted for conducting coloration operations by applying a coloration voltage to selected ones of the display electrodes. The bleaching circuit is adapted for conducting bleaching operations by applying a bleaching voltage to the remaining display electrodes.
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patent: 3921162 (1975-11-01), Fukai et al.
patent: 4096412 (1978-06-01), Sekiya et al.
patent: 4160241 (1979-07-01), Shimizu et al.
patent: 4205903 (1980-06-01), Inami et al.
patent: 4219809 (1980-08-01), Schwarzschild et al.
patent: 4242681 (1980-12-01), Tabata
patent: 4246579 (1981-01-01), Wiesner
patent: 4302751 (1981-11-01), Nakauchi et al.
Sharp Kabushiki Kaisha
Trafton David L.
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