NEC LT154, LT155 Image Options, Keystone, Aspect Ratio not available for RGB and PC Card Viewer

Image Options Gamma Correction

Keystone

This feature corrects the keystone (trapezoidal) distortion to make the top of the screen longer or shorter to be the same as the bottom. Use the or buttons on the slide bar to correct the keystone (trapezoidal) distortion.

Keystone distortion Normal

Use the or button to choose "Normal" when in a lighted room and "Natural 1&2" when in a darkened room. "Natural 1" for better flesh tone; "Natural 2" for true reproduction of middle tones.

Each mode is recommended for :

Normal	For the regular picture
Natural 1	For true color reproduction of natural tones
Natural 2	For dark portions of a picture

Aspect Ratio (not available for RGB and PC Card Viewer)

NOTE: The maximum keystone angle that can be corrected is 45 degrees up- ward and 15 degrees downward with the projector placed horizontally on the ground plane.

Depending on the type of graphics being used, the picture may get blurred or keystone correction may not be possible when excessive keystone correction is used.

The idea is, the closer you are to native resolution, the better image you will see.

Color Temperature

This feature adjusts the color temperature using the slide bar.

Move the slide bar to the right to increase the color temperature for a bluish image; to the left to decrease it for a reddish image.

Lamp Mode

This feature enables you to select two brightness mode of the lamp: High-Bright and Eco modes. The lamp life can be extended up to 2000 hours by using the Eco mode.

High-Bright Mode	This is the default setting.
Eco Mode	Select this mode to increase the lamp life.

NOTE: If you have selected the Eco mode, the lamp lights in High-Bright mode for one minute after the projector is turned on. After one minute the lamp will change to Eco mode.

Aspect Ratio allows you to select the best Aspect mode to display your source image.

When 4:3 is selected from the source (i.e. DVD player), the following selections will display:

Normal Zoom Wide Zoom Cinema

Standard	All 4 sides	Left & Right	Left and right
4:3 Aspect	stretched	stretched	stretched

When 16:9 is selected from the source (i.e. DVD player), the following selections will display:

Normal Zoom Wide Zoom Cinema

16:9 image	All 4 sides	Left & right	Left and right
displayed	stretched	stretched	stretched to
in 4:3 mode			display the true
			aspect

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