Problems configuring AsusTek VW161D with 1366x768x16M

[Eirik Byrkjeflot Anonsen]

Bill Crawford <billcrawford1970 at gmail.com> writes:

> On Wednesday 11 March 2009 08:11:43 Tino Keitel wrote:
>
>> As LCDs usually like vertical refresh rates of 60 Hz, you also
>> shouldn't use a 75 Hz mode.
>
> Most LCDs seem to be capable of 75, and I (alone?) can see the difference, at 
> least on my Hanns·G monitors at work.

Assuming that your lcd has a stable backlight and the displayed image
does not change, the signal refresh rate should not make any
difference at all.

If the backlight is flickering on the signal refresh rate, there's a
fair chance that many people will be able to tell the difference
between 60 Hz and 75 Hz.  On the other hand, if the backlight is
flickering at twice the signal refresh rate or more, it should be
quite hard to notice for most people.

Using a changing image, it should be possible to design a "movie" that
many people with perceive as smoother at 75 Hz than 60 Hz, where the
effect is completely unrelated to sampling artifacts.  (Using sampling
artifacts, it is also possible to make 60 Hz seem smoother than 75 Hz,
which is why I specifically mention that).

However, this depends on the panel refresh rate being synchronized
with the signal refresh rate.  My old lcd monitor (which is now my
secondary monitor) would drop ca 1 frame per second when the signal
refresh rate was ~60 Hz.  So I'm suspecting that the panel refresh
rate was decoupled from the signal refresh rate on that particular
monitor.  I don't know how common that is, though.  (And admittedly, I
haven't tried varying the signal refresh rate to see what happens.)

eirik