You know I had no Idea whites on an oled uses the blue diode, on full blast, which has terrible life.
Any conventional additive color technology (in this case, RGB) is going to use all it's primaries in order to generate white. That's simply how it works -
http://en.wikipedia.org/wiki/Additive_color
Regardless, you are making a lot of assumptions regarding blue here. OLED is a constantly evolving technology, and different processes and materials are used depending on the use-case.
Previously IIRC, Samsung had been using PHOLED for red, and FOLED for green and blue (longer lived, but more power hungry) in order to reduce burn-in and color drift.
UDC has been constantly improving their materials, and I believe Samsung's newest non-pentile panels are now using green PHOLED due to improved life. It's a moving target.
What we don't know is what is actually going into their television panels however. Certainly it is a major concern, but we shouldn't make assumptions until more is known. One thing to consider however is the simply reality of a television display versus a phone/tablet display. It is significantly lower dpi and significantly higher margin. The dramatically changes the equation for what can be used.
LG on the other hand is attacking things from an entirely different direction. Instead of a conventional RGB matrix, they are actually layering their OLEDs in order to generate a completely white sub-pixel matrix, and then overlaying it with an RGBW transmissive layer in order to generate picture elements. This has two immediate implications:
1) By using an RGBW layout versus conventional RGB, they can use lower voltage to create the same apparent brightness. This means lower OLED wear.
2) Since they are using the OLED layers to essentially create an sup-pixel-addressable backlight, they are not inherently forced to use R, G, B, layers to produce said 'white OLED'. IIRC LG is using RGB layers, but technically there are other potential ways to do it. Regardless, there
may be easier ways to control color drift using a layering technique versus a conventional matrix (granted doing such processing can easily go awry - look at Panasonic's black level fuck up from a few years back when they incorrectly stepped the voltage).
Again though, we don't really know what type of OLED's are being used in their display. Is it definitely RGB? PHOLED, FOLED, a mix? Until these things are answered, it's hard to draw conclusions about stuff like aging, drift, etc.
Japan(4K) vs S.Korea(OLED)
I'd rather see these 2 new technolgies combined.
Who said they're mutually exclusive? Current OLED has more than sufficient DPI for 4k panels at these sizes (do the math). LG already plans to offer 4k OLED in 2013.
What you actually want is CLED. OLED has too many headaches over hte long term.
I'm not sure we should automatically make assumptions on CLED regarding this. Colored LED's do not have entirely linear aging either. Hard to tell until we know more.
If you have about 6 million LEDs in the TV, doesn't that mean that it gets a hell of a lot more expensive because you use more LEDs than usual?
Edit: And thx!
How is that different than OLED? It requires the same or more OLED sub-pixels.
Regardless, CLED is using a fairly mature fabrication technique based on semiconductor fabbing. While long-term, processes like vacuum deposition for OLED may prove more cost-effective than Sony's CLED manufacturing, that may not be the case in the short-medium-term.
so is HD TV broadcasting gonna move to 4K?
isnt most HD TV only broadcast in 720p @ the moment?
i see no point in a 4k Television!!
Yes, broadcasting is moving to 4k. Hell, 8k is being tested in some regions.
Also, current HD is not necessarily 720p. It's either 720p, 1080i, or 1080p depending on the channel/provider.
So do I have to buy all new players? Will current hdmi transmit 4k? If I have to swap out my whole HT that will slow me down on buying this stuff.
New players, yes.
Full speed HDMI 1.3/1.4 can support 4k (Sony's projector and TV accept 4k over single-link HDMI), however that's assuming current video characteristics remain unchanged. A definite broadcasting standard and media spec (BD 4k) have not been defined or at least publicly released.
Most are hoping
Rec 2020 will supplant Rec 709. The reduced chroma sub-sampling, increased color bit-depth, increased framerates, etc would require a new HDMI specification and hardware even with the usage of improved codecs like h.265.
Unless 4k TVs cost the same as a normal HD TV, I doubt it will sell. I really believe this is the end for Sony.
Technology advancement ... how does it work?