❻ Correcting Keystone Distortion [Keystone] - NEC ME401X User Manual

❻ Correcting Keystone Distortion [KEYSTONE]
When the projector is not exactly perpendicular to the screen, keystone distortion occurs. For correcting this distor-
tion, you can use the "Keystone" function, a digital technology that can adjust for keystone-type distortion, resulting
in a crisp, square image.
The function of Automatic Keystone Correction is ON as the default factory setting.
The following procedure explains how to use the [KEYSTONE] screen from the menu to correct trapezoidal distortions
when the projector is placed diagonally to the screen.
• Before performing KEYSTONE correction
The KEYSTONE correction has four features, KEYSTONE HORIZONTAL, KEYSTONE VERTICAL, PINCUSH-
ION LEFT/RIGHT, PINCUSHION TOP/BOTTOM, and CORNERSTONE. If the value of either CONERSTONE or
PINCUSHION has corrected, KEYSTONE HORIZONTAL and KEYSTONE VERTICAL are disabled. In this case,
RESET the corrected values and restart to correct distortion.
1. Press the ▼ button on the projector cabinet.
The Keystone screen will be displayed on the screen.
• Press the KEYSTONE button when using the remote control.
• See page for PINCUSHION.
• See page for CORNERSTONE.
• See page for RESET.
2. Press the ▼ button to select [VERTICAL] and then use the ◀ or ▶
so that the left and right sides of the projected image are parallel.
* Adjust the vertical keystone distortion.
3. Align the left (or right) side of the screen with the left (or right)
side of the projected image.
• Use the shorter side of the projected image as the base.
• In the right example, use the left side as the base.
2. Projecting an Image (Basic Operation)
Screen frame
18
Projected area
Align left side