> Interesting. I was told that all LCDs always operate at 60 Hz and it's
> impossible to change.

That's just a property of the driver electronics, you can change the 
voltages sent to the physical LC at any rate you want (of course there 
is some upper limit of what is useful due to the response time).  The 
response time nowadays (at room temperature) is generally fast enough 
for several multiples of 60 Hz to work fine.

 > Similarly, I thought CRTs had specific
> synchronisation circuitry that only works over a very narrow band of
> sync rates.

I'm sure my CRT worked from 60 Hz up to 120 Hz.  IIRC there was a limit 
on vsync and hsync, so at 120 Hz vsync you could only use very low 
resolutions.

> Well, yeah, there is that too. I'm not aware of any video signal system
> that allows faster framerates.

Well the infrastructure is surely still in the software and hardware (at 
least with analogue VGA) for higher framerates as it is commonly used by 
CRTs.  Also reading the wikipedia page on DVI it seems there is no limit 
for the framerate, only the overall bandwidth in single-link (it gives 
1920x1200x120Hz as a valid mode for dual-link).

Just need someone to build a monitor that accepts something other than 
60 Hz!

Post a reply to this message