Because it is possible to electrically switch between flat panel display (2D) and stereoscopic display, not only new 3D dedicated products, but also existing liquid crystal application products equipped with 3D liquid crystal displays have a greater expansion of their use and use pleasure than before. For example, after the 3D LCD is equipped on the computer, we can use the 3D LCD to write articles and calculate tables with 2D display, and switch the screen to 3D display full of realistic presence when using 3D dedicated content such as computer graphics and video games. In the past, you need to wear special glasses to watch 3D images, but 3D LCD uses parallax shielding mode, and you can watch 3D images without glasses through the "switch LCD" developed by our company. The panel is simple in structure and easy to control. The display is easy to control, so it can be widely applied to various devices. Because of its simple structure, it has advantages in cost and reliability. 3D display and 2D display can be switched A stereoscopic display (3D) and a planar display (2D) can be easily switched by electrically controlling a parallax barrier by a "switching liquid crystal", and can be selectively used according to the use. The distance between the human eyes is about 65 mm, and the images seen by the right and left eyes are always somewhat different (binocular disparity). The human brain processes slightly different images seen from the two eyes to produce stereoscopic images. The proceeding direction of the light from the display is controlled so that the left and right eyes can see different images, and therefore, it is possible to view the stereoscopic display without special glasses. It uses the principle of "optical parallax shielding" which has been known for a long time, and consists of the combination of the original TFT liquid crystal display and the independently developed "switching liquid crystal". By switching the liquid crystal, an optical parallax barrier is set. Thereby ensuring that the different patterns of light reach the left and right eyes of the viewer. Then, the combined image of the right-eye image and the left-eye image is displayed on the TFT liquid crystal display as an image for 3D display, and the respective images can be viewed by the left and right eyes.