Answer: From monochrome (red, green, blue) to dual color (red + green), and then to full color (red + green + blue).
Answer analysis:
Common LED display screens can display a wide range of colors, mainly including the following:
1. Monochrome: Monochrome LED display screens can only display one color, and common colors are red, green and blue. Among them, red LED display screens are widely used due to their high luminous efficiency and brightness. They are particularly suitable for occasions where the display effect is not high but information needs to be displayed for a long time, such as outdoor store signs, information display screens, etc. Green and blue LED display screens also have their specific application scenarios.
2. Dual color: Dual color LED display screens can display red and green at the same time. Through the combination of these two colors, yellow can be superimposed, and under grayscale control, multiple colors can be combined through the changes in red and green grayscale. Dual color LED display screens are mostly used for strip screen display and are more common in indoor environments.
3. Full color: Full color LED display screens, also known as tri-color LED display screens, are display screens that put red, green and blue LED tubes together as one pixel. This kind of display screen can well restore the colors of nature and combine almost all colors by changing the grayscale of red, green and blue under grayscale control. Full-color LED display screens are widely used in indoor and outdoor advertising occasions and are the most common and advanced type of LED display screens at present.
In addition, there are some special types of LED display screens, such as curved LED display screens and LED transparent screens. Curved LED display screens can be composed of flexible soft modules, or they can be spliced by rotation to achieve various curved effects, such as inner arc, outer arc, circle, etc., which are suitable for advertising and other occasions. LED transparent screens include two technologies: transparent grille screen and crystal film screen, which can achieve translucent display effects and are mostly used in places such as glass curtain walls.
In summary, the colors that can be displayed by common LED display screens range from monochrome (red, green, blue) to dual color (red + green) to full color (red + green + blue), covering a wide range of colors. These display screens are widely used in various fields and meet the display needs of different occasions.