It has become the choice of many young people to put a projection in the bedroom and lie on the bed comfortably to watch movies and chase dramas. And if the room is not considered to reserve space for the projector during the room decoration, or it is not possible to carry out the ceiling mounted front projection, the projector needs to be placed on the bedside table for side projection.
Many smart projectors now support keystone correction, so side projection is not a problem. However, when some friends use the side projection, they will find a faint “spot” appears outside the screen, which affects the viewing effect. So what is going on?
In fact, this is caused by the basic principle of the projector: the optical zoom makes the bright surface projected by the optical machine not change with the change of the keystone correction. The keystone correction only corrects the projected picture, and the optical machine projects the whole The bright side still appears around the screen in conversation, especially the higher the brightness, the more obvious.
So is there a way to eliminate these spots? In terms of mechanism, the side-projection spot cannot be eliminated. Only the front projection can make the “non-appearing” spot, so if there are conditions, it is recommended to use the front projection. Or in the living room with part of the light, the light spot part will be inconspicuous because of the low brightness.
In summary, we can know that the side-projection picture can indeed be viewed through keystone correction, but after all, there will be some picture loss, which does not make the picture effect optimal. The front projection or side mounting on the wall or on the coffee table can avoid the “spot” effect and make the projection effect better.