LCD panel and method for controlling voltage thereof

摘要

The present invention discloses an LCD panel, which includes a gate driver, a source driver, a plurality of gate lines and data lines. The gate lines and the data lines define a plurality of pixel units, and each pixel unit includes a TFT, a common electrode, and a pixel electrode. The data line is utilized to charge the pixel electrode. The LCD panel further includes a common electrode line, the common electrode line coupled to the common electrode. The common electrode line is utilized to provide alternating common electrode voltages to the common electrode, so that a voltage of the pixel electrode still approaches a target voltage by which the data line charges the pixel electrode when a gate voltage of the TFT is turned off. The present invention also provides a method for controlling voltages of the LCD panel.

主权项

1. An LCD panel, comprising a gate driver, a source driver, a plurality of gate lines and a plurality of data lines, the gate lines and the data lines defining a plurality of pixel units, each pixel unit comprising a TFT, a common electrode, and a pixel electrode, the data line utilized to charge the pixel electrode, characterized in that:
the LCD panel further comprises a common electrode line, the common electrode line coupled to the common electrode; the common electrode line is utilized to alternately provide a first common electrode voltage and a second common electrode voltage to the common electrode, so that the charge voltage of the pixel electrode still approaches a target voltage by which the data line charges the pixel electrode when a gate voltage of the TFT is turned off; and wherein respective voltages of the data line, a gate of TFT, and the common electrode line are controlled according to time points A2, B2, C2, and D2, which are sequentially separated by intervals; at the time point A2, the data line is utilized to provide the pixel voltage to the pixel unit, and the common electrode line is utilized to provide the first common electrode voltage to the common electrode; at the time point B2, the gate voltage of the TFT is turned on, and the data line begins to charge the pixel electrode; at the time point C2, the gate voltage of the TFT is turned off; at the time point D2, the common on, and the data line begins to charge the pixel electrode; at the time point C2, the gate voltage of the TFT is turned off; at the time point D2, the common electrode line is utilized to alter the first common electrode voltage into the second common electrode voltage and provide to the common electrode; and wherein the alternation from the first common electrode voltage to the second common electrode voltage is near the turn-off of the gate voltage of the TFT and during the data line providing the pixel voltage to the pixel unit before the pixel voltage changing, so that the charge voltage of the pixel electrode still approaches the target voltage before the pixel voltage changing.