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A new energy-efficient organic LED (OLED) that glows a deep blue is finally close to meeting the most stringent U.S. video display brightness requirements, researchers say.
OLEDs have enabled a new generation of bright, high-quality, low-cost, power-efficient, flexible, lightweight flat panel displays. Each pixel in an OLED display typically consists of red, green, and blue OLEDs that shine with different brightnesses to produce any desired color.
Phosphorescent OLEDs (PHOLEDs) use only one quarter the energy of conventional OLEDs. Green and red PHOLEDs are already used in smartphones and TVs, leading to longer battery lives and lower electricity bills, but developing the kind of bright deep blue PHOLEDs needed for video displays has proven challenging.
Now scientists have developed what they say are the brightest deep blue PHOLEDs reported so far, work sponsored by Universal Display Corporation and the U.S. Air Force. The researchers added their new lights nearly meet the most stringent requirements of the National Television Systems Committee (NTSC), the video standards used across most of the Americas.
(Score: 2) by frojack on Thursday October 22 2015, @06:09AM
The story gave no clue how or why the air force would be involved in blue led research.
But the story did mention these LEDs have a severe longevity problem.
No, you are mistaken. I've always had this sig.
(Score: 2, Funny) by Anonymous Coward on Thursday October 22 2015, @10:28AM
It's simple. The air force does their work in the air. The sky is made out of air. The sky is blue. Hence, blue LEDs. Q.E.D.
(Score: 1) by Osamabobama on Thursday October 22 2015, @05:25PM
Active camouflage is what you are describing.
Appended to the end of comments you post. Max: 120 chars.
(Score: 2) by darkfeline on Friday October 23 2015, @12:52AM
>But the story did mention these LEDs have a severe longevity problem.
Thanks for reading TFA for me. As soon as the summary mentioned "phosphorescent", alarms bells started ringing.
I suppose on one-year disposable smartphones display life isn't as big a problem as battery life, so blue PHOLEDs will have practical applications (for short-sighted values of "practical").
What's so special about blue, anyway? Regular blue LEDs also took a long time to develop, and now with PHOLEDs too.
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(Score: 4, Informative) by deimtee on Friday October 23 2015, @10:50AM
A photon of blue light is on the edge of having enough energy to disrupt a molecular bond. This makes it tough to make materials that are both stable and have an energy level transition that energetic.
If you cough while drinking cheap red wine it really cleans out your sinuses.