Information processing apparatus including a control circuit for

Details Information processing apparatus including a control circuit for Information processing apparatus including a control circuit for

1992-11-02

1995-01-24

Mis, David

Electric lamp and discharge devices: systems

Plural power supplies

315175, 315209R, 315226, 315307, H05R 4142

Patent

active

053845161

ABSTRACT:
An information processing apparatus employs a liquid crystal display and a fluorescent lamp for backlighting the screen of the liquid crystal display. A lighting circuit for supplying alternating current lighting power to the fluorescent lamp receives input power from either a commercial alternating current power source or from a direct current battery. The level of the lighting power supplied to the fluorescent lamp is determined based upon a determination of whether the input power is being supplied from the commercial power source or from the battery.

REFERENCES:
patent: 4816720 (1989-03-01), Nomoto et al.
patent: 5066894 (1991-11-01), Klier
patent: 5166579 (1992-11-01), Kawabata et al.

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