We first clarify what kind of projector can be side-projected.
The projector with horizontal and vertical keystone correction can be projected from the side, and the projected image from the side must be left or right trapezoid. If you put it on a side table or a small seat, the projected image is low, and the operation at this time is either Change the placement surface with a suitable height, or adjust the height of the front of the projector, then the latter is definitely a vertical trapezoid when projected obliquely upward, so it is best to have both horizontal and vertical trapezoid correction. The angle that can be projected sideways is determined according to the parameters. Professional home theater projection has a 30° angle, that is, the angle between the projection lens and the center line of the screen can be adjusted to a regular rectangle through correction within this range, so how about side projection. We are going to talk about it in detail.
From the perspective of professional installation, the projector does not allow any correction. Why does the side projection lose the picture, because the side projection uses keystone correction or four-corner correction, and the deformed picture is stretched to the position you want by digital means, then it must be It will cause pixel compression to lose the picture and cause local blurring. It is worth noting that the machine without four-corner correction is not very easy to adjust into a rectangle.
In a special case, a machine with a wide range of left and right lens shifts can reduce the side projection angle and reduce the compression area. Friends who have side projection needs can choose.
Side projection creates light and shadow between the original image and the corrected image due to keystone correction. If you want to cast sideways, then the shortcomings must be accepted.
Side shot is the last resort, there is no way to choose.
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2022 07/06