Liquid crystal display and control method thereof

Abstract

The invention relates to a liquid crystal display and a control method thereof. The liquid crystal display comprises a color film substrate and an array substrate, wherein common electrodes are formed on the color film substrate, and storage capacitance electrode lines and grid lines connected with a scanning drive circuit are formed on the array substrate; and the storage capacitor electrode lines are connected with a control circuit for controlling storage capacitance electrode potentials. When the scanning drive circuit applies square line scan signals on the grid lines, and the rising edge of the scan signals comes, the control circuit applies a first voltage on the storage capacitance electrode lines, and when the falling edge of the scan signals comes, the control circuit applies a second voltage on the storage capacitance electrode lines; and the first voltage is smaller than a common electrode voltage applied on the common electrodes of the color film substrate, and the secondvoltage is larger than the common electrode voltage. The invention can output pulse voltages on the storage capacitance electrode lines, so that the potential difference between liquid crystal layerscan be compensated when the line scan signals change, thereby being favorable for improving the display picture quality of the liquid crystal display.

Description

technical field [0001] The invention relates to display technology, in particular to a liquid crystal display and a control method thereof. Background technique [0002] Thin Film Transistor Liquid Crystal Display (TFT-LCD for short) mainly includes: a color filter panel (Color Filter Panel), an array substrate (Array Panel) and a liquid crystal layer filled between the two substrates. The array substrate (arraypanel) mainly includes a plurality of parallel gate lines (gate lines), and data lines (data lines) that are insulated from the gate lines and cross vertically. The area defined by the gate lines and data lines is called a pixel (pixel). , each pixel includes a pixel electrode and a thin film transistor TFT that controls whether the pixel electrode is charged or not. [0003] figure 1 It is an equivalent circuit diagram of a TFT-LCD unit pixel in the prior art. like figure 1 As shown, the gate g, source s and drain d of the thin film transistor TFT are respectivel...

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Problems solved by technology

[0010] It can be seen from the formula (1) that in the prior art, the same common electrode voltage is applied to the common electrode of the color filter substrate and the storage capacitor electrode line of the array substrate. At the moment of transition to the off state, there is a jump voltage ΔVP on the pixel electrode, which is prone to display problems such as flicker and image sticking, thus affecting the display quality of TFT-LCD

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