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Big and Bright Flexible Display:Organic light emitting diode (OLED) displays are attractive because they are bright, efficient, and thin enough to be flexible. But they are currently limited to use in small displays, such as those in mobile phones. That's in part due to the failings of one piece of the device, a transparent electrode used to light up the display. Now researchers at the University of Michigan have developed a new type of electrode that could help clear the way for large, flexible OLED displays. The new electrode is a grid of highly conductive metal wires so thin that they are essentially transparent. Electrical engineering and computer science professor L. Jay Guo says that the electrode should be more flexible and less expensive than ITO, while not degrading the organic materials. (Source)
The terahertz band is "scientifically rich," according to Guo and colleagues. But today's detectors either Converse Red And Black Sneakers
Guo and colleagues invented a special transducer that makes the light to sound Converse High Cut For Ladies
Terahertz Detectors Go HandheldThe terahertz gap is a sliver between the microwave and infrared bands of the electromagnetic spectrum the range of light's wavelengths and frequencies. That spectrum spans from the longest, low energy radio waves that can carry songs to our receivers to the shortest, high energy gamma rays that are released when nuclear bombs explode and radioactive atoms decay.
Nano Printing Goes Large:A printing technique that could stamp out features just tens of nanometers across at industrial scale is finally moving out of the lab. The new roll to roll nanoimprint lithography system could be used to cheaply and efficiently churn out nano patterned optical films to improve the performance of displays and solar cells. So far, however, it's been difficult to scale up nanoimprint lithography reliably. To achieve the resolution needed to print transistors, for example, it's necessary to use a flat stamp that's a few centimeters square and must be repeatedly moved over a surface. This isn't practical when printing large area films for many other applications. "Displays and solar cells require printing over a Converse Shoes For Women much larger area and then cutting it up into sheets," saysJay Guo, associate professor of electrical engineering and computer science at the University of Michigan. "You have to do it in a continuous fashion." (Source)
"I think this offers a very different way of utilizing solar technology rather than concentrating it in a small area," Guo said. "We think we can make solar panels more beautiful any color a designer wants. And we can vastly deploy these panels, even indoors." (source)
A Simple Filter Could Make LCDs More Efficient:Normally, LCDs use several layers of optical devices to colorize, polarize, and shutter light from a backlight, and inefficiencies emerge at every step. Now researchers at the University of Michigan have made an optical film that promises to boost the overall efficiency of LCDs by more than 400 percent so that 36 percent of light makes it through. The new optical film was developed by researchers led by L. Jay Guo, professor of electrical engineering and computer sciences at the university. The film colors and polarizes the light that passes through an LCD more efficiently than conventional components can. (Source)
are bulky, need to be kept cold to work or can't operate in real time. That limits their usefulness for applications like weapons and chemical detection and medical imaging and diagnosis, Guo says.
In between are the microwave frequencies that can cook food or transport cell phone signals, the infrared that enables heat vision technologies, the visible wavelengths that light and color our world, and X rays that give doctors a window under our skin.
conversion possible. A transducer turns one form of energy into another. The cells, believed to be the first semi transparent, colored photovoltaics, have the potential to vastly broaden the use of the energy source, says Jay Guo, a professor of electrical engineering and computer science, mechanical engineering, and macromolecular science and engineering who devised them. They're made with a technique that borrows from conventional inorganic solar cells and more up and coming organic cells. Their color isn't derived from dyes, but rather from adjusting the thickness of their semiconductor layer to reflect certain wavelengths of light.
a reflective photovoltaic color filter device that converts absorbed light to electricity. Reflective color filters produce visible color by absorbing certain wavelengths of light and reflecting, which is similar to the way that paint produces color. The researchers constructed filters for producing cyan, magenta, and yellow. (Source)
Solar Energy Harvesting of Waste Heat from Displays: Researchers at the University of Michigan and the Chinese Academy of Science have developed a new kind of screen pixel that doubles as a solar cell and could boost the energy efficiency of cell phones and e readers. The researchers developed Converse Shoes For Mens 2018
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