Obtaining a preferred projected picture size
The distance from the projector lens to the screen, the zoom setting, and the video format, each factors in the projected picture size.
The projector should always be placed horizontally level (like flat on a table), and positioned directly perpendicular (90°
The modern digital projector does not project directly forward (like older style
If the projector is mounted on a ceiling, it must be mounted
You can see from the diagram on page 20, that this type of projection causes the bottom edge of the projected picture to be vertically offset from the horizontal plane of the projector. When ceiling mounted, this refers to the top edge of the projected picture.
If the projector is positioned further away from the screen, the projected picture size increases, and the vertical offset also increases proportionately.
When determining the position of the screen and projector, you will need to account for both the projected picture size and the vertical offset dimension, which are directly proportional to the projection distance.
BenQ has provided tables of
How to determine the position of the projector for a given screen size
1.Determine the aspect ratio of your screen, 16:9 or 4:3? If you have a 16:9 screen, refer to Table A. If you have a 4:3 screen, refer to Table B1 or Table B2 depending on the projected picture aspect ratio you’ve got.
2.Select a screen size you desire.
3.Refer to the table and find the closest match to your screen size in the left columns labelled "Screen Dimensions". Using this value, look across this row to the right to find the corresponding average distance from screen value in the column labelled "Average". This is the projection distance.
4.On that same row, look across to the right column and make note of the "Vertical Offset" value. This will determine the final vertical offset placement of the projector in relation to the edge of the screen.
18 Positioning your projector