| 摘要 |
PURPOSE:To provide a liquid crystal display device having long service life which can generate a high quality picture and prevent the degradation in a writing characteristic, the degradation in holding characteristic caused by narrowness of a dynamic range of a scanning signal driving IC, and also the degradation of liquid crystal itself. CONSTITUTION:This device is provided with a TFT-LCD panel 1 consisting of plural signal lines and scanning lines arranged in the direction of intersecting each other, pixel electrodes provided at each intersection part of these lines and arranged in a matrix state, and switching elements (TFT) connected between each pixel electrode and signal line and controlled by a scanning line. In a liquid crystal display device in which the TFT performs write-in operation of a display signal at the time of applying a scanning signal and the TFT performs holding operation of a display signal at the time of applying no scanning signal and a picture is displayed, a scanning signal control circuit 5 controlling a scanning signal is provided so that a conduction characteristic of the TFT is elevated at the time of write-in operation of a display signal and a cut-off characteristic of the TFT is elevated at the time of holding operation of a display signal.
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