1. System Design of Edge Blending and Cautions
In order to steadily project a large image or high-definition image using multiple units of
projector without showing an image boundary such as a joint line or change in brightness
and hue, attention should be paid to several points in the selection of projectors, screen and
delivery equipment as well as the method of installation.
z
Projection scheme for high-definition images with a multi-screen support
system
Distributor
Full use of the pixels of the DMD element of
each projector results in clearer and brighter
images.
Image source
Image source
Lightia Lite
Lightia Lite
Lightia Lite
Expanding the image 2 times in
the horizontal direction with the
digital image enlargement
function
Edge blending function
Color matching function
Multi-screen support system
Projection with a single projector
Fig.1
(1) Selection of a screen and lens based on the difference between front and rear
projection systems
1) Front projection system
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The most suitable system for edge blending.
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Select a zoom lens other than a short-focus fixed lens (ET-D75LE5).
* Points to keep in mind
A short-focus fixed lens does not permit zooming or lens shift and the projector needs to
be placed at the center of each image. The lens causes slight distortion of the projected
image around the lens perimeter and does not permit accurate image overlapping at the
joint part.
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The screen should be selected from white mattes (screen gain 1.0 or less) with a wide view
angle
* Points to keep in mind
Glass-beaded, pearl-surface or silver-surface screens have high screen gain and a
narrow view angle. When a projected image is viewed from an oblique angle, a difference
in brightness is visible at the joint line.
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