| 摘要 |
A driving circuit combined type LCD which employs sampling system of analog video signals can not be applied to a medium to large sized LCD. To solve this problem, in an active matrix type LCD having a driving circuit unit which is capable of accepting digital signals having the signal level lower than the power source voltage of a horizontal driving circuit system and pixel unit formed combinedly, level shift circuits for converting the level of sampled digital signals having a small amplitude to digital signals having a voltage of 0 to the power source voltage Vd (for example, 12 V) are provided between sampling switches and latch circuits, thus the structure is capable of accepting digital signals having a small signal amplitude from the outside.
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