Patent ID: 7061481
Filing Date: 2006-06-13
Classification: G09G

Abstract:
1. A power supply circuit which generates a plurality of potentials, comprising: a first step-up circuit connected to first and second power supply lines which supply first and second potentials, and the first step-up circuit supplying a third power supply line with a third potential stepped up based on a difference between the first and second potentials; a potential regulating circuit which is connected to the first and third power supply lines and supplies a fourth power supply line with a fourth potential which is a constant potential generated based on a difference between the first and third potentials; a second step-up circuit which is connected to the first and fourth power supply lines and supplies a fifth power supply line with a fifth potential stepped up based on a difference between the first and fourth potentials; and a multipotential generating circuit which is connected to the first, fourth and fifth power supply lines and generates a plurality of potentials based on differences among the first, fourth and fifth potentials, wherein the multipotential generating circuit includes: