Elo TouchSystems 1519LM User Manual page 32

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 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.
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