| 摘要 |
A circuit capable of reducing a consumption current is provided for a digital display device composed of unipolar TFTs. There is provided a latch circuit for holding a digital video signal. According to the latch circuit, when the digital video signal is inputted to an input electrode of a TFT ( 101 ), a non-inverting output signal is outputted from an output electrode of the TFT ( 101 ) and an inverting output signal is outputted from output electrodes of TFTs ( 102 and 103 ). Two line outputs of non-inversion and inversion are obtained. Thus, when a buffer located in a subsequent stage is operated, a period for which a direct current path is produced between a high potential and a low potential of a power source can be shortened, thereby contributing to reduction in a consumption current.
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