Patent ID: 7773187

Claim:
A liquid crystal display device comprising: a display panel including a plurality of scanning signal lines, a plurality of video signal lines, pixel electrodes each of which is arranged in a pixel region defined by the scanning signal lines and the video signal lines, and a common electrode, and a control printed circuit board including a scanning signal drive circuit for supplying a scanning signal to the scanning signal lines, a video signal drive circuit for supplying a video signal to the video signal lines, and a control circuit for controlling the signals supplied to the scanning signal drive circuit and the video signal drive circuit, wherein the display panel includes a common bus line electrically connected to the common electrodes and formed annularly on a periphery of the display region, a common sensing line for feeding back a voltage of the common bus line to the control printed circuit board, a scanning-signal-drive-circuit-use power source line for supplying electricity for driving the scanning signal drive circuit, and a common-voltage-supply-use line for supplying a common voltage to the common bus line, and the common-voltage-supply-use line, the common sensing line and the scanning-signal-drive-circuit-use power source line are formed along one side of the display panel to which at least the scanning signal drive circuit is connected, and the common sensing line is formed between the common-voltage-supply-use line and the scanning-signal-drive-circuit-use power source line on one side of the display panel.