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From: kony on 4 Feb 2010 22:11
On Thu, 4 Feb 2010 10:15:45 -0000, "Brian Cryer"
<not.here(a)localhost> wrote:


>> I'm not sure of what you are saying. I've seen that focus is not
>> always good with LCD.
>>
>> When buying CRTs, I've always been very careful to buy monitors with
>> totally perfect focus.

.... even totally perfect focus, the best the CRT technology
allows, still blurs together adjacent pixels on their
boundaries. The higher the resolution per screen area, the
worse it becomes. While anti-glare screen coating make them
easier to read in lit rooms, /that/ makes this phenomenon
even worse.

Some will consider it more realistic, since in real life
molecules are too small for the naked eye to see while pixel
pitch is not, but pixel pitch has improved over time on
LCDs, and with them ever larger they can be sat further away
from one's eyes on the desk so even the LCD pixelation some
dislike is becoming less objectionable.


>>
>> So, since I'm accustomed to this kind of quality, I'm been not
>> satisfied with many LCDs for years.
>>
>> Until today, I can say there are very good products, but of course
>> cheap LCDs have bad focus.
>
>Perhaps you should try a different brand or different retail outlet, because
>like Kony indicated, LCDs should give pixel precision and not suffer from
>any focus issues.
>
>The only times I've seen an LCD monitor with what could be described as "bad
>focus" has been when:
> 1. its being run at a resolution other than its native resolution - and
>then typically when its being run at a higher resolution than its native.


Yes I do feel that is one primary drawback of LCDs, I find
the output unacceptable at anything other than native
resolution, or windowboxed on the screen instead of scaled
to fill the whole width or height (whichever would be the
more limiting dimension with same aspect ratio).

>or
> 2. when its being run with an inappropriate refresh rate.
>I suppose logically ghosting/bad-focus effects could also be caused by poor
>quality cabling, but I've only experienced that with CRTs.

I've never seen inappropriate refresh rate cause any issues,
except of course that since LCDs have static images until
replaced, they don't need so high a refresh rate and so are
designed only for the more limited ranges like up to
60Hz-70Hz... so anything higher may not produce an image at
all.

I have often seen degradation from fair quality cables on
1680x1050 and higher resolution, and from poorer quality
cables (even those the manufacturer ships with the monitors
<cough>Viewsonic</cough> at 1280x1024 and higher.


>
>Cheaper LCDs (like CRTs) may have poor contrast or poor colours, but in my
>experience to date, focus is only a problem if the PC graphics has been
>incorrectly configured. That said, I don't buy or use the cheapest of the
>cheap, but neither do I use high end monitors.

I have one of the cheapest of cheap LCDs and find it totally
acceptable for secondary uses like office, email, web
surfing. It does blur a bit on motion like scrolling down a
webpage which my better LCDs do not do enough to notice
much, but then my better LCDs I find quite fine for motion
in movies, gaming, etc. Only on isolated monitor tests do I
notice any issue.

More often what I see on some people's systems is they buy a
big new LCD display and their CPU can't keep up with
upscaling the video in full screen mode, or their video card
at the higher resolutions of same games they used to be able
to play marginally ok. I suppose that is the one tradeoff
when you keep increasing resolution year over year, the rest
of the hardware has to keep up with it.

From: Brian Cryer on 5 Feb 2010 05:11
"kony" <spam(a)spam.com> wrote in message
news:hc2nm5tm3o6nis8anvduul58ltht2ercsb(a)4ax.com...
> On Thu, 4 Feb 2010 10:15:45 -0000, "Brian Cryer"
> <not.here(a)localhost> wrote:
<snip>
r
>> 2. when its being run with an inappropriate refresh rate.
>>I suppose logically ghosting/bad-focus effects could also be caused by
>>poor
>>quality cabling, but I've only experienced that with CRTs.
>
> I've never seen inappropriate refresh rate cause any issues,
> except of course that since LCDs have static images until
> replaced, they don't need so high a refresh rate and so are
> designed only for the more limited ranges like up to
> 60Hz-70Hz... so anything higher may not produce an image at
> all.

When I first started to use LCDs (going back about 8 years I think),
conventional wisdom with CRTs was to have the refresh rate as high as the
monitor would support. Applying the same logic to LCDs I witnessed a few
people (myself included) who ended up with a poor quality display because
the refresh rate was too high and dropping it down (50/60Hz) cured the
problem. These days (in Windows at least) I don't get the option to set an
inappropriatly high refresh rate, so perhaps my observation is now obsolete
(assuming a reasonably up to date os).

--
Brian Cryer
www.cryer.co.uk/brian

From: Jon Danniken on 6 Feb 2010 12:24
John Corliss wrote:
>
> Working on a CRT, as others in this thread have warned you, can get
> you killed if you touch a high voltage capacitor for instance. Not
> only that, but if you actually succeed in turning on a CRT with it's
> cover off, you will be exposing yourself to dangerous radiation.
> Seriously.

More like seriously bullshit. While a CRT monitor does certainly have
deadly high voltage present, and can have high voltage present long after it
has been disconnected from the wall, there is no "dangerous radiation"
emitted when you operative it with the cover removed.

If you are going to pass safety consciousness on to other people, it is in
their interests that they not be given false information.

Jon


From: Jon Danniken on 6 Feb 2010 12:32
Paul wrote:
>
>
> Here is a beauty. Monitors stacked 4 meters high in Hong Kong.
>
> http://www.ban.org/photogallery/china_guiyu_2008/pages/hongkong_smuggling_depot.html
>
> These are places where your e-waste ends up.
>
> http://www.greenpeace.org/raw/image_full/india/photosvideos/photos/map-of-asia-showing-where-e-wa.gif

Damn that's messed up. Our state currently bans dumping monitors and other
e-waste into our well-constructed landfills, so that they can go to be
"recycled".

After seeing those pictures, I can't help but think they would be a lot
safer in our local landfill, which is constructed to prevent discharge of
leachates into the environment.

Jon


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