When teaching multimedia projection, I can't see the projection at all when the weather is clear. I don't know if the equipment is not advanced enough or the settings are wrong.

In multimedia teaching, when the weather is sunny and the sun is strong, it is best to close the curtains. The projector in your school is not bright enough and needs to be used in a dark environment. The brightness of projector is the most important parameter of projector. If it is a highlighted engineering model, it can be used in a brighter environment, but it is not used much in school.

Solution: Close the curtains properly, increase the brightness of the screen, or use some bright PPT background and text and picture colors with high contrast with the background. Of course, these are all compensatory. The most fundamental thing is to minimize the brightness of ambient light and improve the brightness of the projector. If the brightness of the projector cannot be improved, just reduce the ambient light.