Patent ID: 8390555

Claim:
A liquid crystal display, comprising: a liquid crystal panel comprising a plurality of pixel units arranged in rows, a plurality of scanning lines and a plurality of data lines, each pixel unit comprising a thin film transistor, a pixel electrode, and a common electrode, a gate electrode of the thin film transistor connected to a corresponding scanning line, a source electrode of the thin film transistor connected to a corresponding data line, a drain electrode of the thin film transistor connected to the pixel electrode; a scanning circuit configured to activate the pixel units by outputting a plurality of corresponding scanning signals to the thin film transistors via the scanning lines; a data circuit configured to provide data voltage signals to the pixel electrodes of the activated pixel units via the corresponding data lines; and a common voltage circuit configured to provide at least one common voltage signal to the common electrodes of the pixel units; wherein each pixel unit further comprises a coupling member, and when a row of pixel units is activated, all the coupling members in the row of pixel units cooperatively generate a coupling signal according to the data voltage signals applied to the activated row of pixel units, and superpose the coupling signal to the corresponding scanning signal so as to form a feedback signal, the feedback signal is obtained by the scanning circuit sampling the scanning signal from the corresponding scanning line, and is outputted to the common voltage circuit by the scanning circuit, the common voltage circuit adjusts a reference voltage signal according to the feedback signal sampled from the corresponding scanning line, and provides the at least one common voltage signal to the pixel units.