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Printed Electronics World
Posted on May 28, 2010 by  & 

Power efficient AMOLED display

The operational lifetime of an OLED display has been significantly extended whilst power consumption has been reduced by as much as 33%.
An all-phosphorescent AMOLED display architecture that uses a novel four-color sub-pixel design has been developed by Universal Display Corporation . The new pixel format adds a light blue sub-pixel to the conventional red-green-blue (RGB) configuration. The introduction of a light blue sub-pixel can significantly extend the operational lifetime of an OLED display and reduce the display's power consumption by as much as 33%, as compared to an RGB OLED display using a fluorescent blue sub-pixel stated the company.
Conventional R-G-B sub-pixel format (left) versus novel R-G-B1-B2 four sub-pixel design (right)
Universal Display's novel design reduces the power consumption and extends AMOLED display lifetime by relying on the more energy-efficient, longer-lived light blue sub-pixel to satisfy a significant portion of the blue-emission requirement, as compared to a conventional RGB pixel format using phosphorescent red and green sub-pixels and a fluorescent blue sub-pixel. By adding a light-blue sub-pixel, the stress on the deep-blue sub-pixel is also lessened.
To illustrate the pixel architecture, the company, in collaboration with Professor Jin Jang of Kyung Hee University and Samsung Mobile Display, demonstrated the four sub-pixel architecture in a 2.5-inch, all-phosphorescent AMOLED display.
"This has the potential to accelerate and expand the commercialization of all-phosphorescent OLED displays to meet increasing consumer demand for displays with low power consumption and enhanced performance," said Steven V. Abramson, President and Chief Executive Officer of Universal Display.
The company's proprietary PHOLED technology and materials offer up to four times the efficiency of conventional OLED technology, and can be found in a variety of cell phones, multi-media players and other display devices already on the market.
Reference: Universal Display Corporation
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