Canon LV-7545U, Service Manual

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4.5 Image Control
●
Digital keystone function
Smoothly corrects for "keystone" effect on the projection screen, giving a square image
with up to 40 degrees tilt.
●
Digital zoom function
Digital zoom enlarges (or shrinks) any selected part of the presentation image (
×
1/4 to
×
49).
●
Image inversion function
Images are inverted horizontally on rear projection, and they are inverted horizontally
and vertically when the projector is suspended from the ceiling.
●
Noise reduction function (video signal only)
Three-dimensional noise reduction is adopted. The signal-to-noise ratio is improved
without deteriorating resolution and color.
It is effective to old noisy video images. It can reduce roughness caused by noise.
4.6 Mechanism
●
Power-driven lens shift mechanism.
Lens shift is carried out electrically from 1:1 to 2:0.
The power-driven lens shift mechanism can move the projection screen position
vertically and smoothly.
Fig. 1-2
When the lens is shifted to the maximum, the projection screen moves upwards by
approx. 50%. (The screen size is unchanged.)
The projector can be installed more flexibly by combining lens shift with replacement
lenses.
When the ratio is 1:1 When the lens shift is maximized
Part 1: General Information
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