Patent ID: 7106295

Claim:
A liquid crystal display device comprising: a liquid crystal display panel having a plurality of pixels, each of the pixels including a pixel electrode, a pixel transistor and a counter electrode; and a plurality of driving circuits which drive the liquid crystal display panel, the driving circuits including a plurality of first driving circuits which are connected by a wiring made of a same layer as a wiring of the pixel and a second driving circuit which is mounted on a flexible board and connected to the liquid crystal display panel after formation of the liquid crystal display panel, wherein the second driving circuit supplies a video signal from one output terminal thereof to a video signal line of the liquid crystal display panel, and the flexible board has an output terminal portion, an input terminal portion, a first control signal line transmitting a control signal to at least one of the first driving circuits, a second control signal line transmitting the control signal via the input terminal portion to the second driving circuit, an output signal line transmitting the video signal from the second driving circuit via the output terminal portion, and a counter electrode signal line supplying a voltage to said counter electrode of the liquid crystal display panel, and wherein the counter electrode signal line is disposed along the output signal line within the output terminal portion and along the second control signal line within the input terminal portion.