Circuit Description - ViewSonic VE1920wmb-2 Service Manual

4. Circuit Description

The TSUM57AK is total solution graphics processing IC for LCD monitors with panel resolutions up to SXGA. It is
configured with a high-speed integrated triple-ADC/PLL, an integrated DVI receiver, a high quality display processing engine,
and an integrated output display interface that can support RSDS panel interface format. To further reduce system costs, the
TSUM57AK also integrates intelligent power management control capability for green-mode requirements and spread-
spectrum support for EMI management.
The TSUM57AK incorporates the world's first coherent oversampled RGB graphics ADC in a monitor controller system. The
oversampling ADC samples the input RGB signals at a frequency that is much higher than the signal source pixel rate. This
can preserve details in the video signal that ordinarily would be lost due to input signal jitter or bandwidth limitations in
non-oversampled systems. The TSUM57AK also incorporates a new Dynamic Frame Rate (DFR) generator for the digital
output video to the display panel that preserves the advantages of a fixed output clock rate, while eliminating the output end of
frame short-line.
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