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Posts by slacker711

Samsung was first in mobile OLED's, but with respect to televisions, it has been LG pushing almost all of the development since CES 2012.
Korean firm makes sample panels for Appleā€™s iTVhttp://www.koreaherald.com/view.php?ud=20140406000338#9to5mac
Some comments on the discussion. 1) The non-uniformity and pixel failures are not intrinsic to OLED's. The HDTV test review of the Samsung didnt show the non-uniformity that they saw in the LG. Samsung also explicitly advertised their OLED TV as having "zero pixel defect". I think it is apparent that they chose to do this because it was something that LG couldnt match yet. Samsung is using a LTPS backplane which is what they are also using for their mobile OLED's. ...
Unfortunately, I dont have the time tonight to give a detailed reply, and tomorrow is opening day at Wrigley :-) so it might be a few days until I get a chance to think it through.However, from what I have read on the thread, my first thought is that some of the issues are due to the IGZO backplane rather than uneven wear of the materials.
This is just my WAG, but I think any burn-in after six hours is more likely to be related to issues with the backplane than with the materials.FWIW, I found this review.http://www.hometheaterhifi.com/hdtv/hdtv-reviews/oled-curved-tv-lg-55ea980/all-pages.htmlNote that the review was on a demo unit and they also saw some residual luminance that he was able to capture on different colors using a long exposure picture.
Amazon has more from the book that I linked above and the missing page gives a hypothesis for why white has such good color stability. Page 121. http://www.amazon.com/Luminescent-Materials-Applications-Adrian-Kitai/dp/0470058188
I thought we had come to agreement on this the last time we debated it, but then again I am often confused .Just to lay out my understanding of the issue.1) Throw up an all white picture on the LG television for 30,000 hours. You will find that the brightness has been cut in half but that the white point and color gamut will be the same. This is what the paper is talking about. The tandem OLED has very good color stability for white for any single subpixel.2) OTOH,...
The lifetime doesnt work like this for a stacked OLED. The blue is the limiting factor in the half-life for the white emissions but the light output along the entire spectrum degrades at roughly the same rate. The color stability of white is an advantage of LG's approach.
Does anybody remember a review where they performed a 24 hour torture test to check for burn-in? I checked some of the reviews but havent been able to find it, but I am nearly positive that somebody did this for either the LG or Samsung OLED.
HD Guru says that LG stated 30,000 hours for the lifetime.http://hdguru.com/hands-on-lg-55ea9800-oled-hdtv/Of course, the question is at what brightness they run the half-life tests.After six hours in THX mode, I would question whether there was a failure with the backplane more than the materials.
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