The first generation: led display production.

With a single red as the primary color, it mainly displays text and simple patterns, and is mainly used for notifications, announcements and passenger flow guidance systems.

Second generation: Production of dual-primary-color multi-gray-scale displays.

With red and yellow-green as the primary colors, because there is no blue, it can only be called pseudo-color, which can display multi-gray-scale images and videos. At present, it is widely used in domestic telecommunications, banks, taxation, hospitals, government agencies and other places, mainly displaying slogans, public service advertisements, and image promotion information.

Third generation: production of full-color multi-gray-scale display screens.

With red, blue, yellow and green as the primary colors, more realistic images can be displayed, which is gradually replacing the previous generation products.

Fourth generation: production of true color multi-grayscale display screens.

With red, blue, and pure green as the primary colors, all colors in nature can be truly reproduced (even exceeding the natural color range in the color coordinates). It can display various video images and color advertisements. With its brilliant colors, bright high brightness and delicate contrast, it has a good visual impact in the advertising field. The true color 5mm indoor large screen belongs to the fourth generation of products mentioned above. It has high brightness, is not affected by environmental brightness, is thin, takes up little space, has rich colors, and has a wide viewing angle. It can be applied in a spacious hall environment without losing the stitched image.