http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/ Engadget Comments for Nanosys offers better saturation of LED-backlit displays with nanoscale coating http://www.engadget.com/media/feedlogo.gif http://www.engadget.com en-us Copyright 2012 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://img684.imageshack.us/img684/7510/press.png]]>Jan 12th 2010 9:11AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 9:13AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
White light is 'all colors'. It's more efficient to emit a single color. ]]>Jan 12th 2010 9:20AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
In addition, going back to buoy's original question, regular 'white' LEDs are not white. They are either a combination of red/blue/green(and occasionally amber) LEDs, or a single blue LED that has been coated with a substance that absorbs some of the blue light and re-emits it as yellow. (Your eyes see the combination of blue and yellow as white, but these kinds of LEDs are substantially worse at correctly rendering colors, compared to something like an incandescent bulb).]]>Jan 12th 2010 9:45AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Blue has overall higher energy because it is higher frequency than the other visible colors. The nanoparticles, I assume, absorb the blue light, and are excited to higher energy levels. They are designed to then emit light at the desired frequencies. This fluorescence apparently produces higher color saturation than the normal color filters. Correct me if I've got it wrong.]]>Jan 12th 2010 11:54AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
I wish I could remember more, but it has been a while since I took a nanomaterials class.]]>Jan 12th 2010 12:37PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
My question is-- how is this better? It might be good to reduce the cost of full-panel RGB backlit displays, but I cannot imagine how this improves gamut or efficiency. What's needed to improve gamut is getting the correct wavelengths (lasers?) and ultimately saturation (eliminate light bleed).]]>Jan 12th 2010 1:05PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 1:07PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 9:18AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 9:27AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
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Dell's xps and lenovo's w series use triple colored led. Dell's rgbled is $250 more expansive than white led.]]>Jan 12th 2010 12:45PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 1:20PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
I think google dell rbgled should work. I am not very impressed, it has much better color but contrast ratio just as bad as any laptop.]]>Jan 12th 2010 5:04PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 9:48AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
Yup.. Nothing new about it.. Just a new application.. ]]>Jan 12th 2010 10:51AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/not even knew. They've been doing this for a few years now that I can recall. I wrote a paper in school last Feb regarding quantum dot LED and their future in the marketplace.]]>Jan 12th 2010 10:59AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/*new]]>Jan 12th 2010 10:59AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
Here, it seems they are going from blue (high energy) to lower energy photons. So maybe not applicable to solar cells ? Any thoughts?

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Seems fitting for a bunch of nerds :)]]>Jan 12th 2010 10:33AMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 12:25PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 1:31PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 1:43PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 2:03PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/
A LCD display has a white backlight that is constantly producing bright white light (by either CCFL, white LED's, or RGB LED's), which is then polarized and passes through the liquid crystal pixels. Each pixel in a LCD display consists of individual Red, Green, and Blue subpixels that act as "shutters" to the backlight - to display white they untwist to allow all of the backlight to pass through, and to display black they try to block all of the backlight by twisting shut. This is why LCD's generally have a harder time producing black compared to Plasmas (and OLED, SED, FED, and other light producing display technologies), as instead of just not emitting light they have to try to block all of the backlight and getting the liquid crystals to shut all the way is very difficult.

Plasma displays consist of pixels each having Red, Green, and Blue subpixels, that actually emit light instead of filtering it. Each pixel has a cell full of a noble gas which, when electrified, turns into a plasma that emits UV light. The UV light strikes a colored phosphor which then emits either Red, Green, or Blue light. Thus, to display black, a plasma display simply produces less light, enabling better native black levels than from a LCD (however, true black is nearly impossible as the gas must always have some electrical current applied to keep the gas in the plasma state and ensure fast response times - they are always emitting a small amount of UV light).

An OLED display also produces light from each pixel. Each pixel in an OLED consists of a Red, Blue, and Green organic light emitting diode. The advantage of OLED's over plasma is that instead of requiring a UV emitting plasma gas to excite a phosphor, the OLED's directly emit light in the desired wavelength (for red, blue, and green only, white LED's use a phosphor). This means that when no current is applied to the individual subpixel OLED's, they produce no light at all (no baseline current is required to keep response times up). This is much more efficient than both LCD and Plasma as the light undergoes NO filtering or phosphor conversion. Only problem now is that the life of the blue OLED's is significantly less than the red and green, so as the display ages the color balance changes as less blue light is emitted.

I think the confusion stems from the current use of LED tv's when the manufactures are actually referring to LCD displays that use LED's as the backlight source instead of CCFL's. The LED backlight is either a combination of red, green, and blue LED's, or white LED's (which use a blue/UV LED to excite a yellow phosphor to produce a white light, albeit not a perfect white spectrum).

This technology would improve the color reproduction and efficiency of LED backlit LCD displays by allowing the backlight to use blue/UV LED's, which are the most efficient, to emit the perfect wavelength red, blue, and green components of RGB white light by coating them with their product.

I hope that clears things up for people. Main point is what manufacturer's refer to as LED TV's are actually LED backlit LCD TV's and work COMPLETELY different than OLED TV's. In summary, LED backlit LCD's use liquid crystals to vary the amount of light seen by the viewer from a LED backlight, OLED TV's use individual organic light emitting diodes in each pixel to directly produce the light seen by the viewer and vary the amount of light by changing the current supplied to each OLED subpixel.

]]>Jan 12th 2010 6:38PMhttp://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/http://www.engadget.com/2010/01/12/nanosys-offers-better-saturation-of-led-backlit-displays-with-na/Jan 12th 2010 6:44PM