Patent ID: 7705951

Claim:
A liquid-crystal display device comprising: a liquid-crystal display panel; and a semiconductor device connected to a part of a periphery of the liquid-crystal display panel; the liquid-crystal display panel having a plurality of signal lines for supplying various signals to address pixels, on one of a pair of substrates arranged oppositely through a liquid crystal, the signal lines including a common bus line for supplying a reference voltage signal; the semiconductor device being structured with a semiconductor chip mounted on a flexible board, the flexible board at least having a line leading to a terminal for supplying a signal to the signal line of the liquid-crystal display panel through the semiconductor chip; the reference voltage signal being supplied to the common bus line of the liquid-crystal display panel through at least a common line formed on the flexible board of the semiconductor device; the common line on the flexible board being formed in an area outside a mount area of the semiconductor chip and in an area passing through the mount area of the semiconductor chip.