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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 con-
tained 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 resolu-
tion 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 con-
version can result in artifacts in the LCD displayed image such as varying width characters.
A-36 Elo Touchmonitor User Guide
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