Refresh Rate and LCD

1
After reading through past messages, I realize that the response time for LCDs,
which is equivalent to the refresh rate of CRTs, is generally slower than CRTs.
In my tests with an animation loop, I get 60 Hz from the LCD.

But since LCDs don't really scan, isn't there potentially a way to update the screen
faster ? It seems like video cards still treat the output as going to a scanning device
like CRT, and just assume a nominal framerate of 60 Hz if it's LCD and then there
is a scan converter that actually refreshes the LCD screen. Can we trick the video
hardware into putting out data at a faster rate to an LCD though ? Will it work ?
Is there a way to do this on OS X ?

How about syncing ? Does Flip automatically take care of that ?

Sandhitsu
2
Dear Sandhitsu,

The LCD monitors ARE slower. There's no scan (simultaneous refresh of
all the pixels), and the pixels are able to change state separately,
but the process (LC twist/untwist) is slow - 60Hz is the correct
number.
Maybe in the future they will improve, but the bottom line is - if you
need a faster refresh rate, use CRTs.

Yours -
Mark


On Wed, 26 Jan 2005 23:38:35 +0000, sandhitsu.rm <sudas@...> wrote:
>
> After reading through past messages, I realize that the response time for
> LCDs,
> which is equivalent to the refresh rate of CRTs, is generally slower than
> CRTs.
> In my tests with an animation loop, I get 60 Hz from the LCD.
>
> But since LCDs don't really scan, isn't there potentially a way to update
> the screen
> faster ? It seems like video cards still treat the output as going to a
> scanning device
> like CRT, and just assume a nominal framerate of 60 Hz if it's LCD and then
> there
> is a scan converter that actually refreshes the LCD screen. Can we trick the
> video
> hardware into putting out data at a faster rate to an LCD though ? Will it
> work ?
> Is there a way to do this on OS X ?
>
> How about syncing ? Does Flip automatically take care of that ?
>
> Sandhitsu
>
>
>
>
>
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