The Focus of the projected image is adjusted automatically by measuring the distance between front of the projector and screen.
This function activates immediately whenever the power is turned on, the zoom function is adjusted or the position of the projector is changed, so the projector can be set up easily without focusing every time.
When projecting images on a classroom blackboard
without a screen, image colours will be tinged with green. Since
colour data for such occasions as projection on a blackboard
or a coloured wall were previously incorporated in the Projector,
colours and tones of projected images and characters will be
similar to ones that are projected on a white screen if the
"Blackboard Mode" is selected. In addition, choose
between 6 other types from the colour menu including colours
of walls or room partitions.
Angled projection ability lets you place the projector
anywhere you like. A newly developed NEC chip provides
the 3D Reform function, a keystone correction feature
that corrects trapezoidal distortions -something which
was beyond the capabilities of traditional "up-down-left-right"
correction functions. The result is vivid, razor-sharp
image projection. If the projection is distorted, simply
set the four corners of the screen to activate the keystone
correction function and square the picture. This allows
greater freedom in setting up the projector, because
it can now be set up at an angle in relation to the
screen. The projector no longer needs to be placed right
in front of the screen where it can block the audience's
view of the screen.
Distortion that happens when
the projector is not exactly perpendicular to the screen
is called keystoning. To overcome it, NEC created "Keystone
Correction," a digital technology that can adjust
for keystone-type distortion, resulting in a crisp, square
The Automatic Keystone
Correction function corrects distorted images (up and
down) due to angled projection by sensing the vertical
inclination of the equipment with the built-in sensor.With this function, the equipment
can be set up promptly and simply.
Ultra Short-Focal Distance
In an ordinary projector ( lens-projection type
projector) images are displayed using a projection lens, which
consists of about 10 components. Using this method, shortening
the throwing distance is technically limited by the lens diameter,
curvature, and weight. The WT610/615 projector is equipped with
NEC's unique optical design using aspheric mirrors. NEC achieved
the super short focal distance, impossible in ordinary projectors,
by introducing the aspheric mirror, which was developed and
produced with super-high accuracy plastic mirror technology.
The short throwing distance means the presenter can stand in
front of the screen without blocking the light from the projector;
so, there are no shadows on the screen. Presentations focus
more on the presenter.
Screen size - Height x Length (m)
40" (0.6 x 0.8)
60" (0.9 x 1.2)
80" (1.2 x 1.6)
100" (1.5 x 2.0)
* Errors are within +/- 5% of these design values.
*The throwing distance and height of the bottom edge of
the screen are calculated with an aspect ratio of 4:3.