| 摘要 |
The present invention provides a flat-panel display device that does not cause deterioration of display quality such as partial decline of contrast. A signal line driving circuit of the flat-panel display device according to the present invention comprises a shift register, a shift control circuit, an OR gate, a buffer, and an analog switch. The shift register has a first register group and a second register group. The first register group shifts start pulses in order. The second register group shifts the output of the register at the last stage of the first register group in order. When the shift pulse is outputted from the register at the last stage of the second register group, all of the analog switches turns ON, and in synchronism with this timing, all of the video bus line are set at an intermediate voltage, thereby precharging all of the signal lines to the intermediate voltage during a blanking period.
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