Ricoh KW5708, Обучение по обслуживанию

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Slide 56
Terms and Definitions - 9

Gamma correction

This adjusts the signal level to get the correct VT response
characteristics (V: input voltage, T: amount of transmitted
light).

Trapezoidal image correction (Keystone correction)

Depending on the angle of projection, the projected image
will be distorted into a trapezoidal shape, instead of a
rectangular shape.

The projector contains a sensor that detects the angle of
projection in 15-degree increments, and the image is
automatically corrected. This is known as Keystone
Correction.

Projection Distance

This is the distance from the projection lens to the screen.
For a larger screen, the distance becomes longer (the
distance is directly proportional to the screen size).