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OLED Technology and Flat Panels General

cajieboy's Avatar cajieboy
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12-29-2006 | Posts: 4,467
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Originally Posted by hoodlum View Post

This is an interesting article from June of this year. Here is a snippet.

"OLEDs fall into two categories: passive matrix and active matrix. Active matrix means that every pixel is individually switched, as opposed to a passive matrix arrangement, where row and column electrodes are used to control the pixel at a given intersection.

Unfortunately for manufacturers, OLED driving schemes tend to be more complicated than LCD devices. The reason behind this is that OLEDs are current-driven and are sensitive to slight fluctuations in current. LCDs on the other hand are voltage-driven. Instead of needing one thin film transistor (TFT) per pixel in an active matrix scheme, OLEDs need between two to five, arranged in a compensation circuit.

However, the biggest hurdle facing OLED developers is short lifetime. Although OLED materials and device structures have improved greatly over the past few years, manufacturers can still only guarantee between 5000 and 15,000 h of operation before the brightness of the panel is reduced to half of its initial value. This performance is sufficient for mobile phones and other consumer electronics, but inadequate for television and more sophisticated products. The organic materials simply do not hold up well under the driving current or the exposure to other materials within the device. What's more, the cathode material is highly sensitive to air and even when sealed, the OLED performance degrades slowly over time.

Device lifetime is shortened not only by declining brightness, but also by colour drift. For example, if the red, green and blue emitters degrade at different rates, the display shifts in hue over time. Typically, colour OLEDs are made by patterning red, green and blue emitters into subpixels, although it is also possible to mix multiple emitters together to form a single "white" material and use a colour filter.

With a commercial history of just seven years, OLED manufacturing remains at an early stage, both in terms of technique and equipment. Small-molecule OLEDs are made using vapour deposition techniques, such as evaporation through a shadow mask. OLED materials are too delicate for photolithography. Polymer OLEDs are made by solution processing, either spin-on techniques (for monochrome) or inkjet printing (for colour), although the latter has not yet been commercialized. Yields are quite high for simple panels, but established processes have not been put in place for most types of colour panels. This means that OLEDs are still priced higher than equivalent LCDs."


Thanks for the informative post. Even if this article was archived previously, it is not really "old" news, and hence nice to get a refresher that's not buried. OLED seems very far away from any sort of credible development for average size flat panel displays, much less the larger variety gaining popularity in the Home Theater market. SED however DOES have working prototypes w/critical but limited reviews, as well as building production facilities as I type, and even this seems not enough to break into the competitive CE market. OLED appears to be at least a decade behind SED in these respects.

EDIT 1/17/2007 : Due to recent developments between now and when I first posted, SED seems to be headed in the wrong direction. There were no SED's at CES 2007 due to US litigation, Canon has since become the sole owner of SED Inc., and has since put the brakes on the proposed production plant in Japan. What does that spell for SED?...doom.
ddcobb's Avatar ddcobb
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post #32 of 11831
01-05-2007 | Posts: 31
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Originally Posted by Isochroma View Post

Thread Update:

3 January 2007: Display makers to mass produce AM OLEDs

Blackraven's Avatar Blackraven
07:08 AM Liked: 10
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It's good to hear that the Red and Green OLED bulbs have gone past the 60,000 hour mark before 2006 ended.

If you do the math/maths (or mathematics), you would know that:

60000 hours/24 hours (in a day) = 2500 days

Now, 2500 days/365 days in a year = 6.84 years.

That's more than enough even for people who leave their TV on 24/7 non-stop.

But since majority of us (more than 90%) only use our HDTVs for 8-12 hours per day at max, then this numbers double to 12-13 year OR MORE.


But I ask this question:

What about the Blue OLED bulbs?

It appears that it hasn't even reached the 30,000 year lifespan yet.

How's the status of the Blue OLED bulbs?
Blackraven's Avatar Blackraven
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Here's another article from Sony (just came out today) which made a debut of its prototype 27 inch OLED TV running at 1080p resolution and 120hz.

They also announce immediate plans for small-size OLED TV production this year with medium and larger sizes due for 2008-2009.
Sony to Showcase Next Generation Displays (Prototype) at 2007 International CES - OLED TV, Laser Projection TV, and 82inch LCD TV

Tokyo, Japan, Jan 8, 2007 - (JCN Newswire) - Sony is exhibiting the following prototype TVs featuring newly developed technologies from January 7th 2007, at "2007 International CES", Las Vegas. This will broaden the possibilities for future next generation TVs.


Sony will be demonstrating extremely slim, approximately 3mm depth with 11inch and less than 10mm depth with 27inch (when thinnest part of the body is measured), next generation TV displays, with high contrast, wide color gamut, quick response time, incorporating OLED (organic light emitting diode) technology. There are two prototype models, 27inch TV with Full HD panel (resolution: 1920 x 1080) and 11inch TV with wide-SVGA panel (resolution: 1024 x 600). The prospect of mass production of the panels for smaller size OLED TVs is close to be cleared, and development on the panels for middle / larger-sized is currently under development.

82inch LCD TV

82inch large and full HD (resolution 1920 x 1080) screen that adopts 120Hz motion compensation technology and 10-bit panel. This delivers an increase in the television's gradation level, and effectively eliminates image blurring, for example when watching sports footage. In addition to the commonly acknowledged advantages of LCD TV, such as low power consumption and higher picture quality, the model adopts LED backlight which enables wider color gamut.

Laser Projection TV

Laser projection TV using SXRD display device that realizes wider color gamut and high contrast. Furthermore, due to the laser durability, customers are not required to exchange the light source over time. The model size is 55inch with a depth of just 273mm (monitor only), realizing full HD resolution (1920 x 1080). Sony will continue to pursue both design and technology development in seeking to further enhance its projection TVs lineup.

For more details on the Sony Electronics CES 2007 Virtual Press Kit, please visit www.sony.com/news .

About Sony

Sony Corporation is a leading manufacturer of audio, video, game, communications, key device and information technology products for the consumer and professional markets. With its music, pictures, computer entertainment and on-line businesses, Sony is uniquely positioned to be the leading personal broadband entertainment company in the world. Sony recorded consolidated annual sales of approximately $67 billion for the fiscal year ended March 31, 2005. Sony Global Web Site: http://www.sony.net


Sony Corporation
George Boyd

12:13 PM Liked: 15
post #35 of 11831
01-09-2007 | Posts: 1,329
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sony's oled tv pictures

Isochroma's Avatar Isochroma
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Sony's 1,000,000:1 contrast ratio 27-inch OLED HDTV
8 January 2007

Some people need bigger and better LCDs, but we're just fine with the 27-inch prototype Sony mentioned during its press conference yesterday. With a contrast ratio of greater than 1,000,000:1 (not a misprint) to go with its 1080p resolution, and >100% NTSC color reproduction, we'll take this Organic LED great looks in a small package any day. We promised to hunt it down on the show floor and so we did, finding it hiding amongst a rookery of 11-inch displays. Take a look at the gallery for a few more shots of this HDTV and hope it hits shelves someday.
Shuley's Avatar Shuley
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Wonder if this will show up all the Sony haters....hmmm.
JosephShaw's Avatar JosephShaw
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That Sony set has me interested. I'd love a flat planel in the 40-50" range to go over the fireplace without have to resort to LCD or Plasma. I wonder if it's possible to use this technology for front projection?
08:19 AM Liked: 15
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even more of the sony's at ces 07

Blackraven's Avatar Blackraven
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Originally Posted by OreoJoe View Post

More Sony OLED photos

Sony eyes OLED TVs January 8, 2007 4:17 PM PDT
Sony shows off its organic light-emitting diodes, or OLED, TV prototypes at CES. The big one in the middle measures 27 inches across, while the others measure about 11 inches across. OLEDs consume less power and are thinner than LCDs, but the challenge is making them cheaply. Sony's OLED TVs are thin, and they have a nice picture. "Brilliantly bright," says CEO Sir Howard Stringer. They may hit the market next year.

Shockingly insane!!!

But I have a question though?

The 27 inch model is so thin but it leads me to think........

Where is the power supply? what about the hardware board and chips, where are the inputs?

Can we actually store a hardware board on something as thin as that?

I know I'm an average noob but I can't even see where the power cord is?

Where are the buttons for the TV (channel, volume, menu)?

Or does it have an external tuner or box?

From simple looks and observation, the stand is like that of an average lampost but where's the power cord, where's the system hardware (or is Sony capable of making hardware the size of a DVD-case)?

Because to the ordinary person (like me), they can't even tell on how a super clear image is being displayed if there are no plugs or areas where the hardware produces the image?

It leads commoners to think that this is "magic".

Anyone care to explain to an uninformed tech person like I am?

Of course I see the circular/round base (below the stand)that supports it but......
Elemental1's Avatar Elemental1
10:31 AM Liked: 10
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01-11-2007 | Posts: 3,315
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I also wondered 'wow, that is soooo thin, where is the power source'.
I bet it's a block on the floor. Some have a base also.
Very impressive pics but how is the motion?
bri1270's Avatar bri1270
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Wonder if this will show up all the Sony haters....hmmm.

I'm a Sony hater, but I have to say, that 27" set looks very nice. It'll be interesting to see if OLED, laser, and or SED will go in to production anytime soon...I'm all for any one of them to take off.
gus738's Avatar gus738
06:26 PM Liked: 28
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it is inpressive as many people are thinking if this tech was even going to make it and all the sudden out of the blue sony says maybe next year .... nice but as everyone is thinking what is the price ? and i already noticed a flaw , if you look at post #41 where the car is (red car) look at that picture of that one compare to the other shot where its from a difrent viewing angle , now notice somehting? viewing angle is affected to this tv , and #37 on this one not so sure but the one with the lake and the moutain theirs a werid rainbow ....
Isochroma's Avatar Isochroma
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In the photo above, note the LCD (left display) loses most of its contrast off-angle, while the OLED display (right) does not.

OLED displays don't suffer from the viewing angle problems of LCDs because they don't use a polarizer. LCDs need polarizers because the liquid crystals are sandwitched between two polarizers, and act as light valves by rotating the polarization of light.

Because OLEDs are direct-emission, they don't need a polarizer; you're seeing artifacts caused by the camera or other elements in the room.

If you're still not convinced, here are some references:

Universal Display: OLED Technology

OLEDs can provide desirable advantages over today’s liquid crystal displays (LCDs), as well as benefits to product designers and end users. OLEDs feature:

▪ Vibrant colors
▪ High contrast
▪ Excellent grayscale
▪ Full-motion video

Wide viewing angles from all directions
▪ A wide range of pixel sizes
▪ Low power consumption
▪ Low operating voltages
▪ Wide operating temperature range
▪ Long operating lifetime
▪ A thin and lightweight form factor
▪ Cost-effective manufacturability The Inquirer: The Pros and Cons of OLED displays

In general, OLEDs deliver brighter images, higher contrast ratios,

wider viewing angles and, without the need for a backlight, require less power to run. oe magazine: brightness on display

OLED is a viable flat-panel display technology because it has an important set of attractive attributes: high luminous efficiency, color,

wide viewing angles, low drive voltage, fast response, and low process temperature. ----------------------------------------------------------------------------------------------------

8 January 2007

Tucked against a small wall inside Korean electronics giant LG's massive CES booth, three little screens were causing an enormous stir. An easy twenty people were swarming a trio of tiny OLED screens, but even from the outskirts of the mob, a casual pair of eyes could pick out that some stunning tech was on display. LG's AM-OLED A220A screens, ready for use in mobile phones, produced images of such sterling clarity and brightness that it was hard to believe -- that is, until we got close enough to get our peepers a mere five inches from the screens themselves, and at the encouragement of a beaming LG representative.

The 2.2-inch A220A screens boast QVGA resolution (240 x 320) and 262,000 colors. The screens were flashing through a series of high-resolution photographs and video clips, including CG footage of a Final Fantasy-esque mage and a exotic rocketing down a freeway. Our pictures of these OLEDs do not do these little screens justice -- they are amazing, and we want them in our handsets (or portable gaming devices) now.

LG had OLED on display in their booth last year, but the screens were planted on a wall display. At this CES, LG -- which was a lot more open about letting people snap their own in-booth photos -- had the trio of screens on a small ledge where you could take a peek from the side to check out the impressive viewing angle and the ultra-thinness that would make them ideal for popular slim-line handsets.

Beautiful stuff, indeed, and hopefully en route to us.


CES 2007: Hardware Upgrade: OLED Technology
12 January 2007

OLED-based (Organic Light Emitting Diode) displays had a large appearance at CES this year. As they will be the next major technology upon which TVs are based, we decided to take a look at some of these displays. This year, many more manufacturers had OLED-based products on display compared to 2006. At the LG booth, we took pictures of the company’s three smallest OLED displays:

As is evident in the photo, the displays are extremely thin. The 2.2-inch displays display at resolutions of 240x320 and can show up to 262 million colors. The contrast ratio is 10000:1. They also have excellent visibility at angled shots.

Another very interesting OLED product was on display at Sony’s booth; a 27-inch OLED screen. As can be seen, it was sharp, bright, and very much viewable in a well-lit environment. It is also important to note that OLED products consumed far less energy than traditional LCD screens.

A sideshot shows just how thin the screens are. Sony is planning on creating even larger screens throughout the course of this year.

Sony also showed a number of smaller OLED displays. Although not meant for home theater rooms, they would prove to be particularly useful in laptops and small TVs.
gus738's Avatar gus738
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well what ever it is i noticed the picture looks better from one viewing angle then the other.

ADDED: page 36 before the last picture ( 4th pix?) you posted it compare that one with the same (red car) but couple of post later
borf's Avatar borf
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Originally Posted by Elemental1 View Post

Very impressive pics but how is the motion?

my question also.

Blackraven's Avatar Blackraven
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Using manufacturer-listed specs, it is LESS THAN 1 ms or in layman terms, is faster than 1 ms. It is in fact in the micron level.

Like the OLED PC monitor from Samsung SDI already listed sub-1ms response time.

And since we know that for flat-panel TVs the final version is always better than its prototype, it appears that ALL OLED flat panel TVs will have response time that is FASTER than 1 ms (or sub-1ms which means <0.1ms-0.01 ms or less).

Contrast ratio seems to be KING too . The highest I've seen from both Plasma and LCD is 100,000:1 and 50,000:1. The 1,000,000:1 contrast ratio of this Sony 1080p prototype display beats them all. It would take 2-3 more years for Plasma and LCD technology to reach the 1m CR mark.

The only downside I see though with this prototype is the LOW figure for candela brightness.

At 200 cd/m2-600 cd/m2, it is better than any 2006 TV BUT IS NOT ENOUGH to beat what Samsung is coming out with. 1,300 cd/m2 by July this year.

OLED too should push for >1,000 cd/m2 brightness ASAP in order to gain foot in this.
madshi's Avatar madshi
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Originally Posted by Blackraven View Post

OLED too should push for >1,000 cd/m2 brightness ASAP in order to gain foot in this.

What would you need such a high brightness for? Are the sun glasses you must be wearing all day glued to your head?
slb's Avatar slb
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Originally Posted by Blackraven View Post

OLED too should push for >1,000 cd/m2 brightness ASAP in order to gain foot in this.

Good grief! Even at a 400 cd/m² peak, our current plasma has more brightness than needed, even for daytime viewing. 1000 cd/m² would be eyeball scorching.
Elemental1's Avatar Elemental1
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Originally Posted by gus738 View Post

well what ever it is i noticed the picture looks better from one viewing angle then the other.

ADDED: page 36 before the last picture ( 4th pix?) you posted it compare that one with the same (red car) but couple of post later

I wonder if this is due to this TFT hybrid OLED tech of Sony's.
A glorified LCD.
JosephShaw's Avatar JosephShaw
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Originally Posted by gus738 View Post

well what ever it is i noticed the picture looks better from one viewing angle then the other.

ADDED: page 36 before the last picture ( 4th pix?) you posted it compare that one with the same (red car) but couple of post later

My guess, after looking at the picture, was that the close up was taken without a flash, and the far away shot was taken with one. Also, in mentioning the rainbow, that one appears to have been taken with a flash as well, as you can see the same effect, but in a straight ahead shot that shows the flash reflection at the bottom of post #41
gus738's Avatar gus738
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what seems inpressive to me is that oled was like a quiet technology almost never spoken and all the sudden its coming out its going to be great question is how much for a decent size?
irkuck's Avatar irkuck
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The range of 20+" OLED displays Sony presented is ideal to productivization as high-end computer monitors for advanced applications. Even at high price there would be defnitely market for them.

Fact that Sony does not indicate commitment to this means that the technology is way off the prime time.
Blackraven's Avatar Blackraven
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Originally Posted by irkuck View Post

The range of 20+" OLED displays Sony presented is ideal to productivization as high-end computer monitors for advanced applications. Even at high price there would be defnitely market for them.

Fact that Sony does not indicate commitment to this means that the technology is way off the prime time.

They're considering a 2008 release for OLED production for HDTV applications (which is one full year after Samsung SDI releases their OLED HDTV sets later this year).

Even Howard Stringer, "big boss" at Sony, says that they plan to enter OLED production next year.

Ask Isochroma about the press release for that.
etype2's Avatar etype2
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When I first saw the Sony Trintron in 1969,my jaws dropped.

Now in 2007,I saw the Sony OLED's and they wowed me. So beautiful,so sexy,I can't wait.

I hope Sony is the first to market a OLED television. It will be like the Trinitron all over again.
Isochroma's Avatar Isochroma
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CES 2007: Diamonds In The Rough
16 January 2007

Sony had a few tricks up their sleeve including a 52-inch laser-powered, rear-projection SXRD HDTV prototype, two new designs for their second-generation Blu-ray player, and an eye-catching exhibit of AM-OLED flat panel color HDTVs, with six 11-inch models and one 23-inch offering — none of them products at this time...

LG.Philips showcased small, widescreen (16:9) AM-OLEDs for handheld electronics...
naknak's Avatar naknak
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Wow these displays even photograph really well. They must be stunning in person. Oled can't come out soon enough.
Isochroma's Avatar Isochroma
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This image in particular struck me as illustrative of the excellently excessive contrast, impressive color purity & saturation, and of course high 1080p resolution these 27" displays can show.

Thanks MUGEN for the links!
Isochroma's Avatar Isochroma
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DisplayBank: Will 2007 OLED Industry Remain Bright or Dim?
8 January 2007

2005/2006 OLED Panel Shipment Ratio by Application

Shipments of organic Light-emitting diode (OLED) panels surged by 19.7% from the preceding year to 730 million units in 2006, slightly lower than earlier expectations, according to the latest investigation by a market research institute, Displaybank (CEO Peter Kwon). The passive matrix (PM) OLED market has heavy dependence on the application market for use in mobile handset sub-displays and MP3 players, and there have been no new markets found. Displaybank pointed out that, for these reasons, the growth potential has been diluted, and therefore, the commercialization of AMOLEDs have been delayed from the previously proposed 2006 to this year.

The outlook for the major application markets such as mobile phone sub-displays and MP3 players also remains pessimistic. In the past, bright and clear PMOLEDs were mostly adopted in mobile phone sub-displays, while the latest mobile phone market trend is heading for higher specifications and larger main-displays in an effort to enhance functionality such as televisions and motion pictures and design capability, demand for PMOLED sub-displays has continued to weaken. Moreover, STN-LCD prices have dropped below those for PMOLEDs, creating hindrances to the adoption of PMOLEDs in low-end mobile phones, while PMOLEDs are lagging behind TFT-LCD in the high-end application market in terms of performance compared with prices. With regard to MP3 players, Displaybank predicts that, as mobile phones and mobile phone-use multimedia devices have trended to the combination of MP3 player functionality, the MP3 player application market also cannot avoid a negative outlook.

However, a number of companies are likely to plan to or decide to start mass production of AMOLEDs for 2007. The initial market for AMOLEDs will be created by mobile phone main displays, but we need to have more time to keep an eye on whether AMOLEDs could compete with LCDs in prices and functionality, because of very low yields at the current introductory stage. However, if yields will be improved at a rapid pace, and the price gap with TFT-LCDs will shrink to a certain price point, the AMOLED market will likely be on track to grow for 2007.


Korean giants push OLED TV forward
21 February 2007

LG is stepping up its investment in OLED display technology. Currently its Korean rival Samsung is the market leader in OLED screens, with a share of 21 per cent. New data from DisplaySearch reports that LG's OLED business grew by 179 per cent in 2006, after it doubled its production capacity to 2.4 million units, giving it a market share of 19.6 per cent.

OLED screens are capable of high definition display and can be just one centimeter thick, but a short life span has prevented the technology from being implemented in large-screen TV products. However, its supporters are becoming more bullish. Samsung has demonstrated a 30 inch prototype, while LG.Philips has shown screens up to 20 inches.


Cambridge Display Technology and Sumation Announce Strong Lifetime Improvements to P-OLED Material; Blue P-OLED Materials Hit 10,000 Hour Lifetime Milestone at 1,000 cd/sq.m
27 March 2007

CAMBRIDGE, United Kingdom, March 27, 2007 (PRIME NEWSWIRE) -- Cambridge Display Technology (CDT) (NasdaqGM:OLED - News) and Sumation(r) are pleased to announce new growth in lifetime metrics for red, green, blue, and white P-OLED materials.

Data results from spin coated devices using a common cathode and solution processable materials developed in 2006 demonstrate that lifetimes(a) of 24,000, 35,000, 10,000, and 5,200 hours for red, green, blue, and white, respectively, have been achieved from an initial luminance of 1000 candelas per square meter, or cd/sq.m. This is equivalent(b) to over 150,000, 198,000, 62,000, and 27,000 hours from an operating brightness of 400cd/sq.m for these materials.

The latest figures represent a 5x, 11x, 6x, and 5x improvement for red, green, blue and white materials, respectively, compared to lifetimes reported at the end of 2005. In the case of blue, lifetime has been increased by 2.5x in the short time since the last announcement in November 2006.

David Fyfe, chief executive officer of CDT commented, "Since establishing the Sumation joint venture with Sumitomo in late 2005 we have achieved rapid progress in P-OLED material lifetimes, a critical component to commercial adoption. Given the results we have achieved, it now makes sense for us to quote lifetime data from 1000 cd/sq.m, as is becoming standard in the OLED industry. At current lifetime levels, P-OLED technology could meet the requirements for micro and small displays.''

Dr Susumu Miyazaki, chief executive officer of Sumation added, "We're very pleased with the progress we have made in increasing P-OLED lifetimes and are currently proceeding with production ramp-up of these materials. Commercial quantities of materials will be available to our customers in the near future.''
Tags: Led Hdtv , Lcd Hdtv , Plasma Hdtv , Oled Tv , Lg , Samsung

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