Liquid crystal display device and control method for the same

A liquid crystal display device, comprising:

• multiple data lines;
• multiple scanning lines;
• multiple pixel units, wherein each pixel unit is connected to a corresponding data line and a corresponding scanning line;
• multiple switching elements, wherein the multiple switching element are disposed in a non-display area of the liquid crystal display;
• and
• a driving chip connected with the multiple data lines, wherein the driving chip is operable to directly output grayscale voltage signals to the multiple data lines, output a reference voltage signal to the multiple data lines through the switching elements, and output a control signal to the switching elements;
• wherein each switching element has a first terminal, a second terminal and a third terminal;
• the first terminals of the switching elements are directly connected with each other for receiving the control signal outputted from the driving chip;
• the second terminals of the switching elements are directly connected with each other for receiving the reference voltage signal outputted from the driving chip;
• and the third terminal of each switching element is connected to a corresponding data line;
• wherein when the control signal is a first control signal, each of the switching elements is turned off such that the grayscale voltage signals are respectively applied on corresponding pixel units through the multiple data lines, and the liquid crystal display device displays a normal image frame;
• and when the control signal is a second control signal, each of the switching elements is turned on, the reference voltage signal is applied on the multiple pixel units through the multiple data lines, and the liquid crystal display device displays a inserted black frame;
• wherein each switching element is a N-type metal oxide semiconductor (MOS) transistor;
• the first terminal, the second terminal, and the third terminal of each switching element are respectively a gate, a drain and a source of the N-type MOS transistor;
• wherein the reference voltage signal is a common voltage signal applied on a common electrode of the liquid crystal display device;
• wherein each pixel unit includes a red subpixel, a green subpixel and a blue subpixel;
• each scanning line includes a red scanning line, a green scanning line and a blue scanning line;
• the red subpixel, the green subpixel and the blue subpixel are respectively connected with corresponding red scanning line, green scanning line and blue scanning line;
• the red subpixel, the green subpixel and the blue subpixel are connected with a same data line;
• and
• wherein when the control signal is a first control signal, scanning signals on the red scanning lines, the green scanning lines and the blue scanning lines are enabled in a time division manner such that grayscale voltage signals are applied on corresponding red subpixels, green subpixels and blue subpixels through data lines in a time division manner;
• when the control signal is a second control signal, scanning signals on the red scanning lines, the green scanning lines and the blue scanning lines are enabled simultaneously such that the reference voltage signal is simultaneously applied on the red subpixels, the green subpixels and the blue subpixels through the data lines.