17" LCD Open frame SAW TM
（
the Water-proof Type
）
User Guide (Rev1.0)
KeeTouch all rights reserved. The information in this document is subject to change without notice
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Appendix
A
A
NATIVE RESOLUTION
The native resolution of a monitor is the resolution level at which the LCD panel is
designed to perform best. For the LCD touchmonitor, the native resolution is 1280 x 1024 for
the 17 inch size.In almost all cases, screen images look best when viewed at their native
resolution. You can lower the resolution setting of a monitor but not increase it.
Input Video
17" LCD
640 x 480 (VGA)
Transforms input format to 1280 x 1024
800 x 600 (SVGA)
Transforms input format to 1280 x 1024
1024 x 768 (XGA)
Transforms input format to 1280 x 1024
1280 x 1024(SXGA) Displays in Native Resolution
The native resolution of an LCD is the actual number of pixels horizontally in the LCD by
the number of pixels vertically in the LCD. LCD resolution is usually represented by the
following symbols:
VGA
640 x 480
SVGA
800 x 600
XGA
1024 x 768
SXGA
1280 x 1024
UXGA
1600 x 1200
As an example, a SXGA resolution LCD panel has 1280 pixels horizontally by 1024
pixels vertically.Input video is also represented by the same terms. SXGA input video has a
format of 1280 pixels horizontally by 1024 pixels vertically. When the input pixels contained
in the video input format match the native resolution of the panel, there is a one to one
correspondence of mapping of input video pixels to LCD pixels. As an example, the pixel in
column 45 and row 26 of the input video is in column 45 and row 26 of the LCD. For the case
when the input video is at a lower resolution than the native resolution of the LCD, the direct
correspondence between the video pixels and the LCD pixels is lost. The LCD controller can
compute the correspondence between video pixels and LCD pixels using algorithms
contained on its controller. The accuracy of the algorithms determines the fidelity of
conversion of video pixels to LCD pixels. Poor fidelity conversion can result in artifacts in the
LCD displayed image such as varying width characters.
