Sometimes its worth digging a little deeper into things and once you do this for OLED it is apparent why Apple has not used this technology. Fo one thing it uses more power than an LCD when you have a white backgroung, power consumption specs are based on a dark background. The other is lifetime issues with "Blue" affecting color ballance. This maybe an interesting technology but since is based on organic materials (OLED + Organic Light Emmiting Diode) there maybe continuing issues with stability of these materials. It is quite possible that another technology will overcome and surpass OLED. I have looked for what solutions there maybe for the lifetime issue and the only thing has been a release by DuPont of 11/09 saying they have new materials that improve the the lifetime of the Blue (article mainly deals with their improvement breakthrough for green). Even if these claims are true it will take some time to bring these to market. In addition there are still manufacting yield issues to deal with which will keep the prices of this technology high. Aas yield is an issue, typicaly yield goes down with size,(more chance for killer defects) increased size of displays will have even larger costs.
Overall I can see why Apple made the choice they did. However I still do not understand what the market target is for the iPad and do not plan to buy one. But unlike some posters here I do not have this knee-jerk attitude when it comes to anything Apple, repeating over and over again at every other persons post that they will not buy Apple products. I think it is perfectly clear where you stand and doesnt need any more repetition.
Quote from
http://en.wikipedia.org/wiki/Organic_LED
"Disadvantages
[edit] Lifespan
The biggest technical problem for OLEDs is the limited lifetime of the organic materials.[47] In particular, blue OLEDs historically have had a lifetime of around 14,000 hours to half original brightness (five years at 8 hours a day) when used for flat-panel displays, which is lower than the typical lifetime of LCD, LED or PDP technology—each currently rated for about 60,000 hours to half brightness, depending on manufacturer and model. However, some manufacturers displays aim to increase the lifespan of OLED displays, pushing their expected life past that of LCD displays by improving light outcoupling, thus achieving the same brightness at a lower drive current.[48][49]
In 2007, experimental OLEDs were created which can sustain 400 cd/m2 of luminance for over 198,000 hours for green OLEDs and 62,000 hours for blue OLEDs.[50]
[edit] Color balance issues
Additionally, as the OLED material used to produce blue light degrades significantly more rapidly than the materials that produce other colors, blue light output will decrease relative to the other colors of light. This differential color output change will change the color balance of the display and is much more noticeable than a decrease in overall luminance.[51] This can be partially avoided by adjusting colour balance but this may require advanced control circuits and interaction with the user, which is unacceptable for some uses.
In order to delay the problem, manufacturers bias the colour balance towards blue so that the display initially has an artificially blue tint, leading to complaints of artificial-looking, over-saturated colors.
[edit] Water damage
Water can damage the organic materials of the displays. Therefore, improved sealing processes are important for practical manufacturing. Water damage may especially limit the longevity of more flexible displays.[52]
[edit] Outdoor performance
As an emissive display technology, OLEDs are 100% reliant converting electricity to light whereas most LCD displays contain at least some portion of reflective technology and e-ink leads the way in efficiency with ~33% reflectivity of sunlight, enabling the display to be used without any artificial light source.
OLEDs typically produce only around 200 nits of light leading to poor readability in bright ambient light, such as outdoors, whereas displays that use reflective light are able to increase their brightness in the presence of ambient light to help overcome unwanted surface reflections without using any additional power.
[edit] Power consumption
While an OLED will consume around 40% of the power of an LCD displaying an image which is primarily black, for the majority of images, it will consume 60–80% of the power of an LCD - however it can use over three times as much power to display an image with a white background[53] such as a document or website. This can lead to disappointing real-world battery life in mobile devices.
[edit] Screen burn-in
Unlike displays with a common light source, the brightness of each OLED pixel fades depending on the content displayed. Combined with the short lifetime the organic dyes, this leads to screen burn-in[54], worse than was common in the days of CRT-based displays
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