The gamma compensation circuit includes a gamma circuit, a source driver, a TFT, a liquid crystal capacitor, a common voltage circuit, and an adjustment circuit. The gamma circuit has an output terminal connected to an input terminal of the source driver. The source driver has an output an output terminal connected to the source of the TFT. The TFT's drain is connected to a first terminal of the liquid crystal capacitor. The liquid crystal capacitor has a second terminal connected to an output terminal of the common voltage circuit. The adjustment circuit has a first terminal connected to a junction of the output terminal of the gamma circuit and the input terminal of the source driver. The adjustment circuit has a second terminal connected to another junction of the second terminal of the liquid crystal capacitor and the output terminal of the common voltage circuit.