Plasma Display Repair ???

[Leonard Caillouet]

"James Sweet" <jamessweet@hotmail.com> wrote in message
news:BQCob.55485$275.139693@attbi_s53...

If you have a bright static image then yes it can burn in in matter of
minutes, the chances of this are reduced considerably if you set the

A matter of hours, not minutes. The ghosting that you see after a few
minutes clears up very shortly and is not permanent.

brightness and contrast properly though, there's several DVD's available
to
assist in calibrating your whole setup. Newer plasma panels also generally
have added circuitry that shifts around pixels that are static to prevent
phosphor burn, LCD's are still FAR more resistant to it though,

LCDs have no phosphor to burn at all. Direct view LCD do not have anything
like burn-in. Projection panels have been known to suffer heat and UV
damage that can look similar.

but then you
have the backlight tubes that can fail and it can be difficult to source
ones of the correct size and color temperature. Both formats have
advantages

I know of no LCD units that sourcing replacements has been an issue. Which
ones are you talking about. I'd like to know if it is any that we might
have sold or are selling.

and flaws, my personal opinion of the two is that LCD is better for the
smaller sizes and plasma has the advantage for larger screens.

This is pretty clear. Virtually anyone who has much experience with the
units would concur with this.

Still in my
own setup I would prefer an old fashioned Trinitron CRT for smaller
screens
and a projector for large screen.

CRTs are definitely the best value in display technology and in most ways
are still superior to all of the fixed pixel displays with the exception of
brightness and detail at high brightness levels, in some cases. I still
have seen none that can produce good blacks and/or clean dark colors.

So far DLP appears to be the most
promising technology. If cost is no object, I've seen one of these

http://www.christiedigital.com/Products/products.asp?Port=5&ProdPartNo=38-VIV210-01
in action in a few movie theaters running the pre-show advertisements and
crap, generally I hate advertisements but the picture quality was
stunning,
the image was probably 60 feet diagonal and was very sharp with plenty of
brightness.

These are also three chip projectors and no consumer unit is using anything
but single chips with a color wheel.

There are other technologies that look promising. LCOS is the closest to
being marketable. Some units have been available but there have apparently
been problems. The new giant Mitsubishi with this technology is supposed to
be stunning, but at $20K out of reality for most folks. Other technologies
that Sony is working on are Grating Light Valve and Silicon X-tal*1
Reflective Display.

See

http://www.eetimes.com/story/OEG20020614S0126
http://www.sony.net/SonyInfo/News/Press/200302/03-008E/

The biggest complaint that I have about the fixed pixel displays beyond not
producing blacks well is the fact that for any format other than the native
vertical dimension in pixels, scaling is required that almost always ( in
consumer products) has visible artifacts. CRT based systems might not
produce the peak whites that some of these technologies do, but you can
build multiscan systems that require less scaling to display multiple
resolution formats and they produce plenty of brightness for most
applications at a fraction of the cost.

People have been calling the CRT dead for some time, but I think you will
see them for another decade or two while the other technologies continue to
be developed and made cost effective.

Leonard Caillouet

 

[Andre]

Andy Cuffe <baltimora@psu.edu> wrote in message news:<3FA05BE8.2796@psu.edu>...

red wrote:

Well, if if is just the glass that is broke, very cheap fix with a little
skill needed. But if the Plasma Panel itself is cracked they are realizing
that with labor and parts it is cheaper to uy a new or used one.


The hand full I've noticed all clearly had the display tube cracked, or
completely smashed. I still don't know what people do with them that's
worth $500-$1000. I guess the electronics can be used for parts, but
other than that I can't see them being worth anything.

If the tube is cracked there is a very small chance it can be repaired
- these aren't like CRTs where vacuum loss causes permanent damage to
the emitter surfaces.

I'd guess that fusing the cracked glass together and then refilling
with the gas mix might get it working , though.

Anyone ?
-A

 

[James Sweet]

LCDs have no phosphor to burn at all. Direct view LCD do not have
anything
like burn-in. Projection panels have been known to suffer heat and UV
damage that can look similar.

They have no phosphor but they can still "burn in" through electrolosis, but
for TV use it's *very* unlikely for this to occur, I've only ever seen it on
some ATM and gas pump displays.

but then you
have the backlight tubes that can fail and it can be difficult to source
ones of the correct size and color temperature. Both formats have
advantages

I know of no LCD units that sourcing replacements has been an issue.
Which
ones are you talking about. I'd like to know if it is any that we might
have sold or are selling.

This has been with various computer monitors, I haven't yet worked on an LCD
TV set.

 

[ajb]

On Sat, 1 Nov 2003 19:25:32 -0500, "Leonard Caillouet"
<lcailloNOSPAM@devoynet.com> wrote:

[snip discussion of display technologies]

Eidophor, anyone?
--
ajb

Irritating people like to remind me at difficult
times that in China they use the same word for "crisis"
and "opportunity". I remind them that in China they use
the same word for "China" and "Tibet" - and it's "China".