The answer is I don't concern myself with inorganic LEDs anymore-
I pretty much just focus on OLEDs nowadays- really after watching
the development of a range of LED lamps - I'm transitioning to
the realm of printed electronics and OLEDs - on merit ...
Because the're better, more promising and more logical-
My heart and head directed me to focus on where the future is
bright. Anyone need a houseful of gently used old LED lamps ?
I find them to be subpar at this point -- do they still work - sure
is their use part of why my July electric bill was $54. sure
Can I do better - absolutely.
My parting council to the growing number of 1st time LED products-
CHOOSE WISELY - and don't buy into the buy them once every 20 years claim
that's preposterious !
What brand organic LED's are you using?
And yes, the first or second generation LED lights were horrible, but the bulbs that were released in the last six to nine months are pretty good. Cree uses silicon carbide and they do have a much better light rendering, better performance and the are holding up performance wise.
The problem I can see with OLED's for residential and commercial lighting is that they are still on generation 2 at the best, and most thin film organic products also have very finite lives. They will certainly not make a twenty year claim...
My choices in OLEDs are confined to Philips and some TFTs and OLEDS from NewHaven Display for
my Amalgam project - but Lumiotec has a very good consumer product at this point ( I hope to have
a sample lamp soon using 1 (A - $ 377 cost for an innovative - practical yet artistic desk lamp).
I am also anxiously awaiting when I make my own OLED using PolyMertonics science kit DYI sample.
That project got delayed till the fall.
As for which generation were on - as a class of lighting OLEDs are on gen 7 or 8 not 2 -
their fabrication heritage goes back 2 decades!
Some OLEDs are getting very favourable HALT test results indicating 20K + year lifespans are happening
- and that gets
better with things like improved encapsulation processses, and attributes like self healing polymers.
Also the number of OLED offerings putting out 100+ Lm/watts is growing (9 or 10 already)-
and the additional uses of OLEDS goes on
with out being noticed by most - ie Medical display screens, OLEDs are being used in high end cars , yachts &
in aerospace applications- They are only going to skyrocket in their use-
Thanks, I've seen the Lumiotec light. I had been watching the various lighting groups and while there have been lots of press releases of things to happen soon - they don't (few) seem to be making it to the electrical distributors yet.
Reference to gen 2 of the light was an analogy. Even the early LED's you could buy at Homedepot were perhaps gen 7 or 8 also before the big box stores started to carry them. For retail bulbs - I would count the generations from the time they are really being sold to the general public and not the real early adopters.
I tend to be an early adopter and have seen some junk - but I also recognize that is a function of how early I have been buying and I've taken risks.
Perhaps five years ago - I started to watch and ordered some light bulb from VU1... similar idea as OLED, direct photon emission as a result of a flood of electrons in vacuum bulb.... simple idea, good output, dimming, CRI, etc... but five or six years later they still are not shipping in any quantity. The never shipped my early samples I ordered, and they failed to meet the early test market demands of a Lowes....
on that contention that the woefully bad Vu 1 is anything like OLEDs is completely wrong -
it was an abomination. Not any where near as good as current flat tech lighting - OLEDs
and a misbegoten CRT tube pretending to be a light have no reason to be compared.
And due to the realities of commerce I would not expect the smock wearers to be swimming
in the waters of organic- printed electronics lights anytime soon - Big boxes are not the place for
such wares- ( the exception being Best buy's Magnolia outlets stocking the $15,000 OLED TV)
but most won't be out buying one ( though they are impressive to see _ which I did just last week).
Also the TVs vs OLED displays vs OLED lighting make for an apples to oranges to lime comparisons
the wares in the subsets have differences in design and functionality.
The promise of the OLED genre is in elements like their very low BoM content manifests or their
architechture or subpixal level capabilities for illuminance generation, or their energy use.
But for the average Joe they are about 2 years out from being compelling buys- but their general
performance has me talking about them 7 days a week !
I understand the differences in the technologies -- it (VU1) also wasn't a CRT in the same sense, no hot filament as electron source. If you remember the electroflourescent displays used simple point electron emissions for the displays. While the form factor has changed, dimensions are changed, OLED's are essentially using electron simulated emissions of phosphorus (VU1 has the ESL phrasings trademarked..) OLED's get the emission by stimulating the phosphorus as the current moves through the layers.. Some of the early "white" leds were really UV leds using the UV to trigger luminescence -- when eventually the phosphorus failed and the light would look pale blue. Efficiency with the double conversion was horrible. The long term question for OLED's is how the phosphorus (or other flourescent materials) will hold up.