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Posted

http://www.smh.com.au/news/home-theatre/so...5971308686.html

Sony said on Thursday it planned to start selling ultra-thin TVs using organic light-emitting diode (OLED) technology this year, aiming to become the first to market with a TV using the promising next-generation display.

Several companies are investing in OLED technology because it can produce bright, colourful images and does not require a backlight as do liquid crystal displays (LCDs), allowing for a thinner panel. OLED panels are also said to be energy-efficient and good at reproducing fast-moving images.

Posted

OLED displays I have seen have amazing contrast, but it is my understanding they have short life in comparison to LCD/PLASMA. I guess they have to start somewhere though. Cant wait to see a 42" or larger 1080p model once they get the display life issue sorted.

Posted
OLED displays I have seen have amazing contrast, but it is my understanding they have short life in comparison to LCD/PLASMA. I guess they have to start somewhere though. Cant wait to see a 42" or larger 1080p model once they get the display life issue sorted.

Thankfully a technology to replace LCDs - although it's obviously along way off when even Sony consider them to be so expensive that they'll initially market them as a status symbol only.

Posted

I would love to find out more about the blue OLED's. Back in 2004 they couldnt get them to last more than about 1/3 of the life of the other colours (various times of 1000-10000hr life were quoted).

(link)

Absolute life expectance is not actually the biggest issue with OLED as, unlike LCDs which use colour filters over identical pixels, OLEDs are vulnerable to differential aging.

"The big problem for colour is red, green and blue emitters degrade at different rates," says Cobb. "Two years ago, one firm was getting through four displays a day on their stand at a show." They had to swap displays as colour-shift was obvious within hours of switch-on even though the life of its weakest OLED material was rated at 2,000 hours, explains Cobb.

There were then reports of improvements in the blue OLED

"Blue life has increased eight or ten fold in the last 18 months," CDT marketing manager Terry Nicklin tells Electronics Weekly. "At the May SID conference this year we showed 35,000 hours lifetime [from 100cd/m² to half brightness for blue, last month we demonstrated 70,000 hours for blue."

These figures compare with 210,000 hours for red and 200,000 for green, he says.

High efficiency blue materials reach equivalent of 400,000 hours lifetime

CAMBRIDGE, United Kingdom – November 15, 2006 –Just two months after announcing a significant improvement in blue polymer lifetimes, Cambridge Display Technology (CDT) [Nasdaq: OLED] and Sumation® announced another lifetime milestone for blue light emitting polymers.

Data from devices produced using these latest, solution processable, fluorescent materials show lifetime1 of 25,000 hours from an initial luminance of 400cd/m², equivalent to 400,000 hours from 100cd/m².

This represents a 25% improvement over the lifetime results announced in September.

(link)

Does anyone have any recent info about screen life for these new displays ??

J.

Thanks in advance

Posted

:blink: Another 'prototype' marketing creation just as people we're beginning to doubt SED might not actually be coming. I'd wager anything looks good on an 11" screen - heck LCDs and Plasmas look sensational. Seems all the 'effort' in screen technology involves what happens when we make it 50"+ (heat, refresh rates, resolution, image retention, and esp $$$). Hopefully they'll put a 3mm steel plate behind the 3mm thick Tv as you're likely to break it in half accidently :D

Regards

Peter Gillespie

Posted
Thankfully a technology to replace LCDs

How dare you say something like that :D

Granted I'm only really excited about the 07 and 08 model LCD's, but nevertheless, LCD's have heaps going for them, especially when we factor in versatility.

How do you treat custmomers when they enquire about LCD HDTV.....you uppercut em or something?

Working with HDTV's has driven you to the edge of madness :blink:

Posted
How do you treat custmomers when they enquire about LCD HDTV.....you uppercut em or something?

Working with HDTV's has driven you to the edge of madness :blink:

As for who made me the expert....I'VE SELF APPOINTED MYSELF AS SOUTH EAST QUEENSLANDS PQ CHAMPION.

Ladies and gentlemen, the "Champ" has spoken.

Posted
Obviously Sony and toshiba must have found a way to extend the lifetime

Not necessarily - they may just want you to buy a new tv every 3 years :blink:

(I digress)

I am sure they have improved the technology - the link above from CDT suggests 400,000 hours (although this figure is heavily influenced by the brightness of the pixel).

I just wonder 'how much', and most importantly, in the real world.

The quote above that suggests early prototypes had to be changed several times/day when being demoed. That would dampen the publics enthusiasm ......... (sorry sir, this screen is about to be changed so as to last the afternoon - would you like one. Ahhh, I see you have bought several DVD's - perhaps you would like to buy three screens to go with those)

J.

Posted

I agree that LCD is so poor in performance compared to any other technology in term of contrast ratio, although other technology have their own weakness.

Consider this fact, they never compared the best LCD and normal CRT or even compared to the best plasma, in the same environment as their home. Normal buyer usually visit the brightly lit showroom floor to compare their prospective TV. They not realize that the showroom floor have above average ambient lighting compared to normal home ambient lighting, in fact, more than triple.

If you really want to measure it, use light meter to compare ambient lighting between your home and typical showroom floor. You will be very surprised. This is not to mention the factory default setup of brightness and contrast which is tuned for showroom environment, calibration issue, etc.

Because this fact, LCD tech gaining favor compared to other tech. If the typical showroom floor where they display the TV precisely mimic your typical home ambient light, I believe most user in the market for TV size 40 and above will choose other tech in favor to the LCD technology. I'm saying this because for screen below this size, currently you have no choice than to buy LCD.

So, bring it on, SED, OLED, FED...can't wait for them to replace the LCD tech for good :blink:

Peace... hope I'm not provoking flame war... :D

Posted
I agree that LCD is so poor in performance compared to any other technology in term of contrast ratio, although other technology have their own weakness.

I don't think that's true anymore, especially not for HDTV viewing, and especially for 32in LCD.

2007 and 2008 26-37in LCD's will be fine for most people....but any larger, and you're prolly much better off with plasma-DLP.

I don't mind if superior tech comes along, but it'll be yonks before they're affordable/reliable.

  • 3 years later...
Posted
I agree that LCD is so poor in performance compared to any other technology in term of contrast ratio, although other technology have their own weakness.

That has not been true for a couple of years now, good quality LCD's have equal contrast to the most Plasmas and in some cases better. Only the high end Panasonic's have a significant advantage in black level (when new).

If the viewing environment is not dim to dark good LCD's have significantly higher visible contrast than any Plasma due to better screen filters and higher brightness.

A high quality local dimming LCD implementation has the potential to blow Plasma way for contrast, so LCD is not dead yet. Unfortunately there seems to be very little interest in progressing local dimming LCD technology, probably because the vast majority of consumers don't notice or care about the improvement in black level and very few are prepared to pay premium prices for TV's. The price barrier will also keep OLED out of the mains stream market for years and its yet to be seen if OLED does not bring a new set of problems.

Posted

Why buy the larger screen TV's anyway considering the lack pf HD programming presented on free-to-air.

If one is into HD movies it is better to buy a decent projector and a Blu-ray player for the price of an expensive panel.

With that projector, possibly add a HD STB for a $100 bucks to round it off for viewing 'Sports'.

A much cheaper, smaller sized LCD panel can suffice for the news.

Digital TV is just an advertising stream anyway with poor entertainment value to boot.

C.M

Posted

Projectors look like sh$t unless the room is totally dark. Not everyone wants to view in the dark all the time, I certainly don't, nor do I want to put up with a little screen for day to day viewing even for SD Foxtel/Austar.

Posted (edited)
Projectors look like sh$t unless the room is totally dark. Not everyone wants to view in the dark all the time, I certainly don't, nor do I want to put up with a little screen for day to day viewing even for SD Foxtel/Austar.

Yes, but that's you Owen.

But as an alternative to a big bulky panel that takes 2 men to lift, a hidden projector with a wall mounted, fixed screen behind drawable drapes may be more attractive to their styling.

C.M

Edited by Tweet
Posted
That has not been true for a couple of years now, good quality LCD's have equal contrast to the most Plasmas and in some cases better.

True Owen, but the post you replied to is at least 3 years old so maybe correct at the time of writing?

Posted
Yes, but that's you Owen.

But as an alternative to a big bulky panel that takes 2 men to lift, a hidden projector with a wall mounted, fixed screen behind drawable drapes may be more attractive to their styling.

C.M

I really don't think I'm the only one who does not do most of my viewing in total darkens, and who cares if the TV takes 4 men to lift, once its mounted who needs move it?

A big flat panel can be flush mounted and concealed by motorised sliding doors or a curtain if required and they work well in broad daylight. The only advantage I see in a front projection setup is a larger screen for the price, however a good projector and screen is not exactly cheap at double the price of a 65” Plasma.

Posted
The only advantage I see in a front projection setup is a larger screen for the price, however a good projector and screen is not exactly cheap at double the price of a 65” Plasma.

Not to mention the lamp replacement at about 2000rs max. most change it before that and they are not cheap either !

cheers laurie

Posted
Not to mention the lamp replacement at about 2000rs max. most change it before that and they are not cheap either !

cheers laurie

That's not a valid reason to avoid projectors as far as I am concerned. If the display does what you want to hell with the running cost.

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