Found some info about LCD refresh rates at http://www.hitachidisplays.com/products/how_monitors_work/flatpanel.shtml
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You will also notice that, unlike CRTs, manufactuers of LCD monitors recommend using a lower refresh rate ; 60 or 70 Hz;
The reason for lower refresh rates in LCDs is because the liquid crystal molecules damper flicker and higher refresh rates are not as important.
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Also : http://home.houston.rr.com/djsmith7/refresh.htm
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Refresh Rate: Flat Panel (LCD) vs. CRT monitors
Expressed in Hertz (Hz), in interlaced mode this is the number of fields written to the screen every second. In non-interlaced mode it is the number of frames (complete pictures) written to the screen every second. Higher frequencies reduce flicker, because they light the pixels more frequently,reducing the dimming that causes flicker. Also called vertical frequency.
Same as vertical frequency, is measured in Hertz (Hz) and represents the number of frames displayed on the screen per second. Too few, and the eye will notice the intervals in between and perceive a flickering display. The world-wide accepted refresh rate for a flicker-free display is 70Hz and above, although standards bodies such as VESA are pushing for higher rates of 75Hz or 80Hz.
A CRT has three electron guns whose streams must converge faultlessly in order to create a sharp image. There are no convergence problems with an LCD panel, because each cell is switched on and off individually. This is one reason why text looks so crisp on an LCD monitor. There's no need to worry about refresh rates and flicker with an LCD panel - the LCD cells are either on or off, so an image displayed at a refresh rate as low as between 40-60Hz should not produce any more flicker than one at a 75Hz refresh rate.
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- Hope this helps! - MJ