Abstract: Disclosed are a power supply circuit which can cope with a multipotential level design and is suitable for generating potentials for driving a liquid crystal, and a liquid crystal device and an electronic instrument which use the power supply circuit. A first step-up circuit in the power supply circuit generates a first stepped-up potential level obtained by stepping up a power-supply level with a ground level taken as a reference. A regulator circuit generates a center potential obtained by regulating the first stepped-up potential level by referring to a reference potential level with the ground level taken as a reference. A second step-up circuit generates a second stepped-up potential level obtained by stepping up the center potential with the ground level taken as a reference.

Abstract: An electronically controlled appliance capable of automatically adjusting a contrast level of a data display module is disclosed. The device includes an appliance, an intelligent control electrically connected to the appliance and adapted for controlling the appliance, a data display module capable of contrast adjustment and electrically connected to the intelligent control, a data storage medium electrically connected to the intelligent control storing software instructions for monitoring the amount of time the appliance is in an active state and instructions for compensating for the temperature change associated with the amount of time by adjusting the contrast level of the data display module.