Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1994-12-06
1996-12-24
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327121, 327544, 327589, G05F 110, G05F 302
Patent
active
055876838
ABSTRACT:
A booster circuit device comprises: a liquid crystal drive circuit (14) whose dissipated current changes; a timing circuit (11) for outputting a select signal according to the dissipated current of the liquid crystal drive circuit; a drive signal select circuit (12) for selecting and outputting any one of at least two drive signals CLK of different frequencies on the basis of the select signal outputted by the timing circuit (11); and a booster circuit (13) for supplying a supply voltage to the liquid crystal drive circuit (14) on the basis of the drive signal CLK outputted by the drive signal select circuit (12). Since any of the drive signals CLK of different frequencies can be selected and applied to the booster circuit (13) according to the dissipated current of the liquid crystal drive circuit (14), it is possible to reduce the current dissipation of the booster circuit, that is the current dissipation of the whole booster circuit device can be reduced markedly.
REFERENCES:
patent: 3657658 (1972-04-01), Kubo
patent: 4883976 (1989-11-01), Deane
patent: 4894559 (1990-01-01), Kaneko
patent: 5029282 (1991-07-01), Ito
patent: 5105187 (1992-04-01), Plus et al.
patent: 5362990 (1994-11-01), Alvarez et al.
patent: 5388084 (1995-02-01), Itoh et al.
Katsuki Syuji
Kawasaki Masayuki
Kuwasima Yasunori
Sueda Akihiro
Tachibana Hidehiko
Callahan Timothy P.
Kabushiki Kaisha Toshiba
Nu Ton My-Trang
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