There will be a little blue light. According to UD Digital Network, the LCD screen itself will produce blue light, and long-term use under high brightness may bring some fatigue to the eyes. Both LED and LCD display screen need backlight to provide brightness, while white LED is usually used for backlight. Some of these white LEDs may have some blue light components. Blue light is a light with short wavelength and high energy. Prolonged exposure to blue light may cause eye fatigue and discomfort. In order to reduce the potential impact of blue light on eyes, the big screen of intelligent classroom usually filters or adjusts blue light. This means that the display screen will reduce the intensity of blue light or use software to adjust the color temperature to make the blue light radiated by the display screen more comfortable and appropriate.