Liquid crystal display device

A liquid crystal display device, comprising:

• a liquid crystal panel including a display portion divided into a plurality of regions that are driven at the same time;
• data signal line driving circuits and data signal lines that are individually provided to the respective plurality of regions;
• a first analog power supply circuit that is connected to an external power supply, and outputs a first analog voltage to each of the data signal line driving circuits, the first analog voltage being generated based on a power supply voltage output from the external power supply;
• a second analog power supply circuit that is connected to the external power supply, and outputs a second analog voltage for generating a reference voltage based on the power supply voltage output from the external power supply;
• and
• a reference voltage generating circuit that is connected to the second analog power supply circuit, generates the reference voltage based on the second analog voltage output from the second analog power supply circuit, and outputs the generated reference voltage to the each of the data signal line driving circuits,
• wherein the each of the data signal line driving circuits generates, based on the reference voltage, a gray-scale voltage to be supplied to each of the data signal lines.

A liquid crystal display device, comprising:

• a liquid crystal panel including a display portion divided into a plurality of regions that are driven at the same time;
• a plurality of data signal line driving circuits and data signal lines that are individually provided to the respective plurality of regions,
• the plurality of data signal line driving circuits comprising a first data signal line driving circuit and a second data signal line driving circuit;
• a first analog power supply circuit that is connected to an external power supply, and outputs, to the first data signal line driving circuit, a first analog voltage generated based on a power supply voltage output from the external power supply;
• a second analog power supply circuit that is connected to the external power supply, and outputs a second analog voltage for generating a reference voltage based on the power supply voltage output from the external power supply;
• a third analog power supply circuit that is connected to the external power supply, and outputs, to the second data signal line driving circuit, a third analog voltage generated based on the power supply voltage output from the external power supply;
• and
• a reference voltage generating circuit that is connected to the second analog power supply circuit, generates the reference voltage based on the second analog voltage output from the second analog power supply circuit, and outputs the generated reference voltage to each of the first data signal line driving circuit and the second data signal line driving circuit,
• wherein each of the first data signal line driving circuit and the second data signal line driving circuit generates, based on the reference voltage, a gray-scale voltage to be supplied to each of the data signal lines.