View Full Version : OLED or SED for the future?
tman_ndsu08 05-03-07, 11:50 AM I'm against SED because they use phosphor coating to create the picture, just like a CRT.
And just like a CRT, phosphor coating doesn't produce a pure spectrum like an LED does.
So I favor OLED.
What do you guys think?
Economies of scale and current acceptance of LCD and plasma technologies will be a major barrier to new/other technologies. Even if there is a new display "mouse trap", in considering the $30+ BILLIONS spent on LCD and plasma, coupled with the huge losses incurred by everyone in the business, just exact WHO will have money to invest in something that is designed to fix something that in not considered BROKEN.
tman_ndsu08 05-03-07, 04:25 PM I hate plasmas too. Same phosphor problem.
Economies of scale and current acceptance of LCD and plasma technologies will be a major barrier to new/other technologies. Even if there is a new display "mouse trap", in considering the $30+ BILLIONS spent on LCD and plasma, coupled with the huge losses incurred by everyone in the business, just exact WHO will have money to invest in something that is designed to fix something that in not considered BROKEN.
Hi
I think you have this exactly right. No way that any other technology can compete with plasma and LCD.
I wonder what happended to the Mitsubishi Laser TV?
Kind Regards
cajieboy 05-05-07, 03:30 AM I'm against SED because they use phosphor coating to create the picture, just like a CRT.
And just like a CRT, phosphor coating doesn't produce a pure spectrum like an LED does.
So I favor OLED.
What do you guys think?
Frack pure spectrum! Think about how your eyes fatique in an LCD environment. Not good for me. Too bright,and eyes hurt after viewing LCD hour after hour. so forget a movie that last 2 hrs. Those little self-illuminating phosphors have the warm & fuzzies w/me when viewing at home. I think I'll keep 'em for now.
tman_ndsu08 05-06-07, 12:43 PM Who said anything about LCDs on top of the OLED?
Not only would the OLEDs be the backlight, they'd be the actual viewing surface.
Blackraven 05-07-07, 09:29 AM Between the two, I'd say the victor here would be OLED.
No question ;)
tman_ndsu08 05-07-07, 10:57 AM Right.
Now we gotta get the manufactures to start churning these babies out cheaply.
OLED eat themselves alive, especially the large area displays. Making them cheap isn't the task. Making them work is.
jgreen171 05-07-07, 06:14 PM They eat themselves alive? How melodramatic :)
In reality, red and green phosphorescent emitters are at the stage where their lifetimes are MORE than acceptable for HDTVs. The only straggler is blue.
And yes, making OLEDs affordably is still an issue too. The economies of scale enjoyed by the LCD industry currently trump the relatively small amount of infrastructure that manufactures active matrix OLEDs.
tman_ndsu08 05-09-07, 11:37 AM It's not about lifetime (although burn in is a legitimate concern with phosphors).
It's about pure spectrum. Phosphors are a slap in the face when it comes to spectrum. All over the place.
Isochroma 05-10-07, 09:36 PM So true! Phosphors have pretty poor spectral purity compared to ILED/OLED. Reds are the best, greens are a wide hill, and blue is also very wide.
Even worse, while phosphors have a short excite time, the afterglow is persistent and lasts far too long, leaving motion trails when objects move against a dark background, and general motion smear in any motion scenes.
Blackraven 05-11-07, 02:49 AM So true! Phosphors have pretty poor spectral purity compared to ILED/OLED. Reds are the best, greens are a wide hill, and blue is also very wide.
Even worse, while phosphors have a short excite time, the afterglow is persistent and lasts far too long, leaving motion trails when objects move against a dark background, and general motion smear in any motion scenes.
The resident AVSF OLED GURU speaks the truth. :D
:cool:
OLED and SED: not ready for prime time.
And LCD only cause eye fatigue because you are staring at a very bright fluorescent tube, flickering at 60Hz, hours on end. LED BL will solve this (if they can get the colors right).
Isochroma 05-11-07, 04:50 PM @DBLASS:
LCD backlights don't flicker at 60Hz., they run from PWM-based inverter circuits in the 5-25 KHz. range. And brightness is adjustable.
Your only correct point is that LED BLU color purity will be superior to CCFL.
Your right, and I know better. I was flashing on the 60Hz beat frequency the CCFL can pick up off of other fluorecscent lights.
Isochroma 05-11-07, 08:15 PM Ah. I had some fun with that beat frequency today while visiting my local Compusmart, where they had on display a Samsung 214T. On the dark background I could clearly see diagonal 'waves' which would fade in and out, and reverse directions periodically.
They use 60Hz. metal halide lighting, so it was probably beat frequency, but since I hate the 'dirty' look of Samsung's AR coating, and their pricing, I'll be going with an LG L2000C at the end of this month, replacing my current ViewSonic P220f CRT.
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