Source: PRO AV Magazine
Publication date: December 1, 2006
By Robert Foster
As with most manmade things, no display technology is without its shortcomings. CRTs tend to be large and bulky, plasmas come with burn-in and heat dissipation issues, and LCDs have motion artifacts. In an attempt to address these and other issues, manufacturers continue to develop new technologies. In the midst of this process, as prices for LCD panels come down and sizes go up, many industry observers believe this technology will eventually become the favored display type.
A major difference among display technologies is the way images are displayed. CRTs present images via a scanning beam that energizes red, green, and blue phosphors located near the glass viewing screen. The major benefit of this technology is an ability to display interlaced images from two fields to create a single video frame without difficulty. LCDs on the other hand, function similarly to a film projector and can only display single frames of video. The end result is that LCDs look great with progressive, frame-based images; however, they still have some difficulty with field-based interlaced video — an anomaly most people relate to pixel response.
What is pixel response?LCD/TFT screens have groups of red, green, and blue sub-pixels or dots for every pixel. Sub-pixels are basically very tiny light valves that open and close based upon a digital value. When all three sub-pixels are on, the pixel will g...
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