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In Reply to: Re: wall mounted thin style tv/monitors. what should i be looking for ? posted by avjguy on December 25, 2004 at 18:02:27:
"...to me is the high contrast picture quality that does not change as you move around the room."Sorry, but I can't leave that comment alone!
Plasma displays almost always show a reduced or truncated contrast scale, compared with conventional CRT displays.
You can see this plainly on any of the video test discs currently avaialble. ICIA sells a DVD, for example, that contains a graduated gray scale in 100 steps, from 100% white to 100% black (I believe the same thing can be found on the Video Essentials disc). On a typical plasma display the last 8-10 steps of this scale (near black and near white) are indistinguishable from pure black and pure white, whereas on a good, properly calibrated CRT they can usually be seen. I know, I've seen this demo'd at InfoComm.
This contributes to the typical "washed-out" look of plasmas. Although plasmas have improved substantially sinced they were first instroduced, the limited contrast scale is still a liability IMO. For serious movie viewing, I prefer a CRT.
I'll grant you that the image from a plasma does not have a limited viewing angle the way a RPTV does. That, and the cool-looking, slim profile, are the only positives I can see to owning a plasma.
But then, why would anybody a piece of gear just because it "looks cool"? I'd rather own something that has a great picture.
Follow Ups:
1999?Most of what you posted is either personal opinion or incorrect. Even many of the "lesser" models made today are better than the picture you paint. Do some research and I'm sure you'll correct your comments -- if you're honest.
You can start here:
- http://www.avsforum.com/avs-vb/forumdisplay.php?s=0caa435be7f0257ae98d431b2be4386a&forumid=40 (Open in New Window)
and they look washed out to me. Not as contrasty as a good CRT. I still prefer my Sony RPTV.
I've yet to see a plasma at BB that was setup optimally. They all look terrible. You should look at one that is set up and calibrated.
the following article is very interesting reading (see link)-I found this part of the article most useful-
"With flat-panel monitors, we can force light from a cold-cathode light source (such as a fluorescent lamp) through a light shutter (AM LCDs) made up of pixels coated with tiny precision filters and get our color images that way. Or, we can discharge electricity through pixels filled with a rare gas mixture (plasma) and watch as color phosphors are stimulated to produce RGB color imaging.
In the old days, color imaging was accomplished by tickling phosphors with an electron gun. Surprisingly, this system produced (and continues to produce) the most lifelike images of all, which is why a small number of high-end customers still prefer CRT front projectors for home-theater applications.
That's because CRTs are capable of a wide grayscale and can show images with very low luminance levels (shadow detail) as well as very high luminance levels (highlights) in the same scene. More importantly, when a CRT is idling, it is essentially shut off. I mean really shut off, as in black and not a deep gray, as you'll see with LCD, DLP, and LCoS projectors, and AM LCD and plasma monitors.
While there have been tremendous advances in color imaging with flat-panel displays, one stumbling block still remains. And that's the ability (or inability) to show a grayscale with the widest possible dynamic range."
Note that I never said that plasmas have a terrible picture or anything like that, only that they have a reduced grayscale compared with CRT (I incorrectly called it "contrast", as the article points out). That means that you can't see the blackest blacks or the whitest whites on a plasma, which is why I prefer CRT for critical viewing.
BTW, when discrete three-chip DLPs are avaiable at a reasonable price in home units, you can bet that I'll be the first kid on my block to get one.
further on in the article, Mr Putman says that there is one brand of plasma (Panasonic) whose black level and grayscale, when calibrated, approach that of a good CRT display (i.e., Mr Putnam's reference Princton CRT). I can't say that I've ever seen that brand, so perhaps there is indeed one plasma out there worthy of consideration.However, I'm still not convinced that plasma is as good a value as my Sony KP-57WS510, which I purchased a year ago for less than two grand delivered.
First, Putman is correct that the Panasonic glass does, indeed, have contrast superior to other plasma glass and, in fact, the 50" Fujitsu I have uses said Panasonic glass with superior signal processing. Performance is excellent.Second, there's no way to accommodate such a large-screen display in my room unless it is flat (plasma or LCD) or front projection. RPTVs and direct-view CRTs take up too much space and prevent me from arranging my speakers correctly.
Just a little fwiw. Firstly, the fireplace idea looks great in Architecutural Digest, but is ridiculous. A 42" Plasma, DLP, (whatever) loses the wow factor when you're 12 feet away. Way too far back, for my taste. Now if you get closer? The heat from your fireplace, plus the neck ache? Do you read me? The screen should be at eye level. Also, and it's been said, soot and heat are not a good thing on your brand spanking new plasman. I was gung ho on plasma until I seriously started considering DLP (on a suggestion from a good buddy who owned a Pioneer plasma) options. Well, you know which one I chose. Hey, there's no panacea, but the DLP did it for me. Spectacular bang for the buck. peace, warren
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