Electrochromic indicator

Details Electrochromic indicator Electrochromic indicator

1977-07-18

1979-05-15

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

58 23R, 58 50R, 307270, 325455, 340785, G04B 1934, G04B 1930, G04C 1700

Patent

active

041545125

ABSTRACT:
The proposed electrochromic indicator can be used in clock dials and band selector indicators of radio receivers and it comprises electrochromic cells placed in series to form a closed circuit. Each point of connection of the leads of said electrochromic cells is coupled via a respective switching means to the terminals of a d.c. voltage source. Each switching means comprises two transistors of different conductivity, whose emitters are connected to a respective point of connection of the leads of the electrochromic cells. The collector of one of the transistors is connected to the negative terminal of the d.c. voltage source, and the collector of the other transistor is connected to the positive terminal of that source. The bases of the transistors are connected to a respective control signal bus and are connected via a resistor to one of the terminals of the d.c. voltage source.

REFERENCES:
patent: 3807832 (1974-04-01), Castellion
patent: 3961842 (1976-06-01), Jasinski
patent: 3968639 (1976-07-01), Berets et al.
patent: 4007583 (1977-02-01), Johnson
patent: 4060974 (1977-12-01), Natori et al.
patent: 4060975 (1977-12-01), Yamaguchi

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