Elo TouchSystems ET1825L-8SWA-1 - Manual (Page 15)

Elo LCD Touchmonitor User Guide- 15
The native resolution of a monitor is the resolution level at which the LCD panel is
designed to perform best. For the Elo LCD touchmonitor, the native resolution is 1280 x
1024 @ 60Hz for the 18.1” 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.
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:
As an example, a SVGA resolution LCD panel has 800 pixels horizontally by 600 pixels
vertically. Input video is also represented by the same terms. XGA input video has a
format of 1024 pixels horizontally by 768 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 45 column and 26 row of the input video is in 45 column and 26 row
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 in the 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.
Appendix A – Native Resolution