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atd2002

13 Posts

19431

April 27th, 2007 03:00

2007FP / Refresh rate unavailable

Hi all,
 
Recently purchased and received a Dell 2007FP - my first LCD. I have it set to 1280*1024 (not its optimal resolution, but I find 1600*1200 too small).
 
Anyway, I think the native 60Hz refresh rate is a little harsh on my eyes - according to the Dell manual, there is a 75Hz refresh rate offered at my resolution, but it doesn't show up when I try to change it.
 
I have a nVidia GEForce 7300LE card with the original driver installed (forceware 82.68).
 
Would updating my driver give me the 75Hz refresh rate or is it a misprint in the Dell documentation?
 
Thanks!
anthonyd

gpro

2 Intern

 • 

2K Posts

April 27th, 2007 04:00

TFT screens do not refresh in the same way as a CRT screen does, where the image is redrawn at a certain rate. A TFT monitor will only support refresh rates coming from your graphics card between 60Hz and 75Hz. Anything outside this will result in a "signal out of range" message or similar. The “recommended” refresh rate for a TFT is 60hz, a value which would be difficult to use on a CRT. The “maximum” refresh rate of a TFT is 75hz, but sometimes if you are using a DVI connection the refresh is capped at 60hz anyway.

As a TFT is a static image, and each pixel refreshes independently, setting the TFT at 60hz does not cause the same problems as it would on a CRT. There is not cathode ray gun redrawing the image as a whole on a TFT. You will not get flicker, which is the main reason for having a high refresh rate on a CRT in the first place.

- TFT Central LCD specifications.

atd2002

13 Posts

May 6th, 2007 23:00

gpro:
 
thanks for the info.
 
I am currently using the monitor at 1280*1024 - not the optimum setting (I know) but 1600*1200 seems a bit too small for my eyes. This is one of several pre-set modes that the LCD supports - everything seems fine - do you think it reasonable to use it at this setting?
 
Also - how far away should an LCD be from your eyes - I know with a CRT there is concern about sitting too close, but I'm not sure that applies to an LCD? I don't think there is any radiation emission to worry about?
 
 

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