| 摘要 |
PROBLEM TO BE SOLVED: To provide a gradation voltage generator circuit capable of suppressing brightness variation caused by power supply tolerance, and a display device which uses the same for generating analog voltage (gradation voltage) used for digital-to-analog conversion.SOLUTION: A gradation voltage generator circuit includes; a ladder resistor circuit which comprises a plurality of serially connected resistors and outputs a plurality of gradation voltages of different levels from terminals of each resistor; and a constant current source serially connected to the ladder resistor circuit. The constant current source has a current source transistor serially connected with the ladder resistor circuit and a voltage setting section which selects and sets a voltage, which determines the amount of current flowing through the current source transistor, from a plurality of voltage levels. |
