数码彩屏分类
Digital color screen classification
LED的发光颜色和发光效率与制作LED的材料和工艺有关，目前广泛使用的有红、绿、蓝三种。由于LED工作电压低（仅1.5-3V），能主动发光且有一定亮度，亮度又能用电压（或电流）调节，本身又耐冲击、抗振动、寿命长（10万小时），所以在大型的显示设备中，目前尚无其他的显示方式与LED显示方式匹敌。
The color and efficiency of LED are related to the material and technology of LED. At present, there are three kinds of LED widely used: red, green and blue. Due to the low working voltage (only 1.5-3V), active light and certain brightness of LED, brightness can be adjusted by voltage (or current), impact resistance, vibration resistance and long service life (100000 hours), there is no other display mode comparable to LED display mode in large display equipment at present.
把红色和绿色的LED放在一起作为一个象素制作的显示屏叫做双色屏或彩色屏；把红、黄、绿、蓝四种LED管放在一起作为一个象素的显示屏叫全彩屏。
When red and green LEDs are put together as a pixel display screen, it is called two-color screen or color screen; when red, yellow, green and blue LEDs are put together as a pixel display screen, it is called full color screen.
无论用LED制作单色、双色或三色屏，欲显示图象需要构成象素的每个LED的发光亮度都必须调节，其调节的精细程度就是显示屏的灰度等级。灰度等级越高，显示的图象就越细腻，色彩也越丰富，相应的显示控制系统也越复杂。一般256级灰度的图象，颜色过渡已十分柔和，而16级灰度的彩色图象，颜色过渡界线十分明显。所以，彩色LED屏当前都要求做成256级灰度的。
No matter how to make a monochrome, bicolor or tricolor screen with LED, the brightness of each LED that needs to form a pixel to display the image must be adjusted, and the fine degree of adjustment is the gray level of the screen. The higher the gray level, the more delicate the displayed image, the richer the color, and the more complex the corresponding display control system. Generally, the color transition of 256 gray level image is very soft, while the color transition boundary of 16 gray level image is very obvious. Therefore, the color LED screen is currently required to be made of 256 levels of gray