Patent ID: 7528816

Claim:
A semiconductor device comprising: a first substrate; a second substrate; a thresholdless antiferroelectric mixed liquid crystal between the first substrate and the second substrate; first to n-th signal lines between the first substrate and the thresholdless antiferroelectric mixed liquid crystal; a sampling circuit comprising first to n-th analog switches; a scan direction switching circuit comprising first to n-th switching circuits; and a shift register comprising first to n-th register circuits, wherein the i-th register circuit comprises: a first inverter circuit having a first input terminal and a first output terminal; and a second inverter circuit having a second input terminal electrically connected to the first output terminal and a second output terminal electrically connected to the i-th signal line, wherein the second output terminal of the i-th register circuit is electrically connected to the first input terminal of the (i+1)-th register circuit, wherein the first inverter circuit is a clocked inverter circuit, wherein the i-th analog switch having: a video input terminal; a first timing input terminal electrically connected to the second output terminal of the i-th register circuit; a second timing input terminal electrically connected to the second output terminal of the i-th register circuit via a third inverter circuit; and a video output terminal; wherein the i-th switching circuit comprises: a first analog switch having: a third input terminal electrically connected to the second output terminal of the i-th register circuit and to the sampling circuit; and a third output terminal electrically connected to the first input terminal of the (i−1)-th register circuit; and a second analog switch having: a fourth input terminal electrically connected to the second output terminal of the i-th register circuit and to the sampling circuit; and a fourth output terminal electrically connected to the first input terminal of the (i+1)-th register circuit, wherein n is a natural number, and wherein i is a natural number larger than 1 and less than n.