Re: Mac Mini connected to Sharp Aquos 32 inch
- From: Bruce Tomlin <bruce#fanboy.net@xxxxxxxxx>
- Date: Tue, 15 Aug 2006 13:20:42 -0500
In article <1155662209.193588.55560@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
twism113@xxxxxxxxx wrote:
Hello all,
I recently purchased a Sharp Aquos 32 in LCD LC-32D40U and connected my
Mac Mini to it via a DVI to HDMI cable. The quality looks great except
for one problem, the top menu and a bit of the dock at the bottom of
the screen is cut off. I currently have the resolution set to 1280 x
768 and it is the only resolution that displays. I have tried several
software packages for the Mac that let you declare custom resolutions
and none have proven to be effective.
I can't tell you how to fix it (it may be possible to adjust in the
service menu, but maybe not), but I can tell you what it is. It's
called "overscan", and it's an artifact of the CRT tube days where to
get an edge-to-edge picture (not only to avoid blank areas, but to keep
Joe Obsessive from whining about a picture from a tilted yoke that
wasn't lined up with the edges of the cabinet), the electron beam was
"overscanned" past the edges by about 5%. And the picture will move
left or right by a small amount depending on which way it is oriented
relative to the Earth's magnetic field, also annoying Joe Obsessive.
When it comes to an LCD set, it is completely pointless, and merely an
excuse for the manufacturer to save a few pennies by having to put 5%
less pixels in the screen.
Actually that's not entirely true, as a standard NTSC signal uses some
of that overscan area at the top of the screen for closed captioning and
other stuff, which is why the 480p DVI signal into my Sony CRT won't
display the first few lines no matter what I do in the service menu.
But that's an artifact of analog which should not exist in higher
resolution signals.
I'm sure that part of the reason this still happens is that monitor
manufacturers want to charge more for "computer" monitors than for
"television" monitors, so they cripple their "television" monitors with
overscan. Which is stupid, because other manufacturers don't, so they
will sell neither type of monitor.
About the only way you can be 100% sure (without research) that your
display will not do this is to insist on a 15-pin VGA (yes, analog)
input, since that is traditionally underscanned on CRT monitors.
As for the bottom of the screen, I hate the dock using up the limited
vertical dimension (doubly limited in widescreen), so I always put it on
the right side.
.
- References:
- Mac Mini connected to Sharp Aquos 32 inch
- From: twism113
- Mac Mini connected to Sharp Aquos 32 inch
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