SED TV Queston

[KyoDash]

I've been looking around the net at various sites, but to no avail.

Basically I was wondering if these new SED displays were 'fixed panel' ones like Plasma and LCD, as I would be looking for a HDTV that could do 480p as well as 720p without scaling much like a SDTV does both 240p and I think it's 320p (I just know it as medium res coming from an arcade background).

If anyone could help that'll be great.

[Nabs]

SEDs look good on paper but they may actually be prone to burn in or magnetic field distortion - I will watch the first screens avidly, otherwise look great. I cannot see a whole range of them though at viable prices to the majority for a good few years though.

[Slippers]

Looks like they have a fixed resolution.

www.canon.com/technology/display
www3.toshiba.co.jp/ddc/eng/sed

I'd say that there's a lot of information in this thread which started on the 5th of January last year, if you want to know more.
www.avsforum.com/avs-vb/showthread.php?t=491741
At the end of the thread (p26 currently) they are talking about the SEDs at CES this week.

[KyoDash]

Cool, thanks for that.

I checked out the links and it seems they are 'fixed panel' though it is never directly mentioned. I guess we will just have to wait until they appear as retail units and see what the options are.

If they do turn out to be fixed I'll just buy a 4:3 CRT Naomi arcade monitor which does amazing 480p only through VGA or a multi-sync ones which does 240 up to 480.

When will someone make a widescreen display which has multiple resolutions, or will I have to buy arcade tech again for that.

[SeanT]

Can't you import a high def widescreen CRT from the states for your purposes?

[welwynnick]

Originally Posted by Nabs

SEDs look good on paper but they may actually be prone to burn in or magnetic field distortion - I will watch the first screens avidly, otherwise look great. I cannot see a whole range of them though at viable prices to the majority for a good few years though.

Magnetic field distortion affects CRT TVs and monitors with scanning electron beam displays. No steering is required with SEDs, and the cathode path is so short that external fields will have negligible effect.

Nick

[Nabs]

You may be right regarding the magnetic field and I hope no burn in but you have to remember it is possible to cause burn on crt, difficult but possible, and if the contrast and brightness are very high on the sed (to complete with plasma) it may have some burn in facts. I guess the only thing is to see when they are out. I myself would love loewe to pick up the technology if it is a success.........

[Liam @ Prog AV]

Originally Posted by KyoDash

When will someone make a widescreen display which has multiple resolutions, or will I have to buy arcade tech again for that.

Well unless, as with CRT, the display uses a gun to draw the lines then multiple resolution is impossible. So no flat panel technology could dynamically change it's resolution unless it had really cool liquid pixels that could bond together or something. However all is far from lost, just buy a decent video scaler which will rescale without introducing mosquito noise.

[welwynnick]

Was that 2000 posts, now, Liam. Yeehaa! I'm only coming up to the Big One.

Lots of people have speculated that SED will have screen burn problems, because they use phospors to generate the light, like CRTs. Well, no-one avoided buying a CRT because of the risk of screen burn, did they? That was only an issue with older plasmas.

Assuming SED will be progressively scanned like LCDs etc, I think there's a case to suggest that they will be more robust. CRTs effectively illuminate one pixel at a time, relying on persistence to keep the picture illuminated. That means the tagetted pixel has to be driven hard to generate the output. With SED, all pixels are presumably driven continuously, so do not have to be driven nearly so hard to generate the same output over a period of time.

There are some assumptions there, but right now I think th only reason for not having an SED is likely to be price, unless they license the technology out to other manufacturers. And I bet a lot of negotiation about that has been going on or some time already.

Nick

[Liam @ Prog AV]

WOOHOOO finally hit the big two-k!!!! I didn't even notice Nick (wasn't it one of our processor discussions last year where I mentioned I didn't have far to go?).

[Liam @ Prog AV]

Oh, wait a minute, my 2000th was probably just a minute later on the Pioneer pixl thread. Either way, 2002 posts now!!!!

[welwynnick]

Originally Posted by Liam @ Prog AV

Oh, wait a minute, my 2000th was probably just a minute later on the Pioneer pixl thread. Either way, 2002 posts now!!!!

Well, here's my one-thousandth post!

Yahoooo!

I was looking for the right opportunity to celebrate.

Nick

[Liam @ Prog AV]

Congratulations!!!

[KyoDash]

However all is far from lost, just buy a decent video scaler which will rescale without introducing mosquito noise.

That's exactly what I don't what to do. I've never seen an image using a scaler to look as sharp or as clean as it's original native resolution. For gaming I find scalers unexceptable for all except converting 480i to 480p.

Ultimately I don't care about thin displays. I would rather have a large tube coming out of the back if it were to do multiple resolutions. Sadly it seems companies care more about marketing larger resolutions to people non the wiser, and at the same time sacrificing options which age old arcade monitors and TV's have been able to do.

It's not much to ask.

Is there a chance that anyone will develop a CRT tube with 720p and 480p without scaling, not a thin one just a standard CRT.

[tryingtimes]

Wouldn't the problem with that be visable scanlines on the 480p? or if they got that right, it would have overlapping scanlines on the 720p. Every CRT device has a sweetspot resolution even if they are capable of all of them.

Why are you so against scaling? Done properly, it's fantastic! It's deinterlacing that causes the problems - and that's not the display's fault.