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Old 05-03-2010, 05:07 PM   #124
grumbles
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Posts: 238
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Join Date: Nov 2009
Location: Toronto
Device: Pandigital Novel (Black), T-2 and 3, Nexus 7
Quote:
Originally Posted by LDBoblo View Post
LCDs are indeed actively refreshed/redrawn. To claim otherwise is silly semantics.
Yes they are but this has nothing to do with the refresh rate that is set in the video driver. It is not silly semantics.

If you decrease the refresh rate with a CRT, you will start to notice a distinct flicker on the screen, first in your peripheral vision (most sensitive to movement) and then in your central vision. This is a physical change in the nature of the display.

With an LCD the intervals between screen updates will lengthen as the refresh rate drops but there will be no screen flicker as the result of the drop in refresh rate. The screen will look the same.

Since the display has to convert the vga signal to whatever internal format the display uses, there is probably a maximum frame rate that the display can handle. Exceeding this rate may result in missing information but it will not change the naure of the display and certainly not introduce flickering like reducing the refresh rate on a CRT.

If someone has trouble reading lcd dispalys, the refresh rate has nothing to do with it.

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the grumbling curmudgeon
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