Different from traditional projection, the LED display screen does not need to turn off the lights during class. It can intelligently adjust the brightness and display at a brightness suitable for

human eyes. It is helpful for students to take notes in a bright classroom environment and protect students' eyesight. At the same time, the subject knowledge can be displayed vividly, and 

the learning atmosphere can be fully mobilized. 

Cailiang ultra-clear small pitch D1.83, D1.86, and Indoor D2.0, D2.5 have ultra-high definition, 3840Hz smooth frame change, so that the eyes of teachers and students are free from fatigue, 

and the picture is more delicate Expressiveness can well improve student learning experience and teacher teaching quality.