Mitsubishi ew230u-st User Manual

EN-12

The distance from the projector lens to the screen, the zoom setting (if available), and the video format each factors in 

the projected image size.

16:10 is the native aspect ratio of EW230U-ST. To be able to project a complete 16:9 (widescreen) aspect ratio image, 

the projector can resize and scale a widescreen image to the projector's native aspect width. This will result in a 

proportionally smaller height equivalent to 90% of the projector's native aspect height.

Thus, a 16:9 aspect image will not utilize 10% of the height of a 16:10 aspect image displayed by this projector. This 

will be seen as darkened (unlit) bars along the top and bottom (vertical 5% height respectively) of the 16:10 projection 

display area whenever displaying a scaled 16:9 aspect image in the vertical center of the 16:10 projection display area.

The projector should always be placed horizontally level (like flat on a table), and positioned directly perpendicular 

(90° right-angle square) to the horizontal center of the screen. This prevents image distortion caused by angled 

projections (or projecting onto angled surfaces). 

The modern digital projector does not project directly forward (like older style reel-to-reel film projectors did). 

Instead, digital projectors are designed to project at a slightly upward angle above the horizontal plane of the 

projector. This is so that they can be readily placed on a table and will project forward and upwards onto a screen 

positioned so that the bottom edge of the screen is above the level of the table (and everyone in the room can see the 

screen).

You can see from the diagram on page 

, that this type of projection causes the bottom edge of the projected image to 

be vertically offset from the horizontal plane of the projector.

If the projector is positioned further away from the screen, the projected image 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 image size 

and the vertical offset dimension, which are directly proportional to the projection distance.

This is due to interference with the screen surface and is not a mal-function. Replace the screen or displace the focus a 

little.

4:3 aspect image in a 16:10 aspect display area

16:9 aspect image scaled to a 16:10 aspect display area