Why the brightness of some projectors can't be adjusted? There are three reasons.
1. It may be that the projector itself is not very bright and therefore the manufacturer does not add this function.
2. It may be that the projector's light source does not support brightness adjustment technology and therefore the brightness cannot be adjusted.
3. It may be that the color of the picture would be affected when the brightness is adjusted, so the manufacturer did not add this function.
1. It may be that the projector itself is not very bright and therefore the manufacturer does not add this function.
2. It may be that the projector's light source does not support brightness adjustment technology and therefore the brightness cannot be adjusted.
3. It may be that the color of the picture would be affected when the brightness is adjusted, so the manufacturer did not add this function.
