With the development of display technology, the flat panel device, such as Liquid Crystal Display (LCD) possesses advantages of high image quality, power saving, thin body and no irradiation. Thus, it has been widely applied in various consumer electrical products, such as mobile phone, television, personal digital assistant, digital camera, notebook, laptop, and becomes the major display device.
Most of the liquid crystal displays on the present market are back light type liquid crystal displays, which comprise a shell, a liquid crystal display panel located in the shell and a backlight module located in the shell.
The traditional LCD panel comprises a Thin Film Transistor Array Substrate (TFT Array Substrate) and a Color Filter (CF). The pixel electrode and the common electrode are respectively formed on the TFT substrate and the CF substrate, and Liquid Crystal is injected between the TFT substrate and the CF substrate. The working principle is that the light of backlight module is refracted to generate images by applying driving voltages between the pixel electrode and the common electrode for controlling the rotations of the liquid crystal molecules with the electrical field formed between the pixel electrode and the common electrode. The traditional liquid crystal display panel has defects of the narrow view angle, and the color washout phenomenon under wide view angle.
For expanding the view angle of the liquid crystal display panel, a Plane-to-Line Switching (PLS) liquid crystal display panel is proposed. The PLS liquid crystal display panel is to locate the pixel electrode and the common electrode on the same substrate, and the vertical electrical field formed between the pixel electrode and the common electrode is employed to drive the liquid crystal molecules to rotate along the direction parallel with the substrate to expand the view angle. However, in the PLS liquid crystal display panel, all the liquid crystal molecules are aligned along the same direction, which can cause that the colors shown by the PLS liquid crystal display panel will change from the different watch angles and create the color washout phenomenon. Generally, the color washout is improved by utilizing the method of forming multi-domains in single pixel unit. Nevertheless, as the method is applied to the PLS liquid crystal display panel, the crystal textures are formed at edges of respective domains. Accordingly, the brightness descends and the display effect is influenced.