Quote:
Originally Posted by JSWolf
I've never read before what the defect was only what triggered it. Thanks for that.
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yeah i've had to look back through notes, emails and posts to recall it all. The displays were built by PVI not LG. PVI apparently did a whole run of displays without the proper filter layer.
basically it boiled down to PVI leaving out a filter that blocked some light getting to the TFT backplane. the materials used to create the backplanes are photoconductive. too much uv causes current leakage, the current is what flips the eink capsules from black to white and the grey tones. leaving one layer off might not be a problem for LCD panels used for laptops or other LCD displays. but eink panels are more often used in full sun. PVI actually argued for awhile that the displays were "in spec" but when I talked with them at SID display week in May of 2010 they acknowledged their mistake.
I think they were truly embarrassed to have not realized the issue sooner or to catch it in QC.