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OLEDs now appear in a host of commercial electronics applications, most commonly in exhibits for radio displays in high-end cars, tablet PCs and other consumer gadgets. But what about OLEDs as general light sources?


One challenge for OLED development engineers has been to create large panels. In general, the larger the panel, the lower the cost of OLED light. Processes and materials limitations determine how large a panel can be. The higher the light output, the more limited the life of the device, so a trade-off has to be made.


RGB stripe construction is the most


effective way of creating OLED’s, which maximizes the light output for energy consumption, and creates a dimmable, colour tunable and white-tone tunable light source. Mitsubishi Chemical, which markets OLEDs under the Verbatim brand, uses a wet process. This avoids defects in the OLED structure when microscopic particles of foreign material are encountered.


OLEDs need a large emission surface to be suitable for lighting applications. The quality of light is important, and low power operation is vital in a world focused on reducing energy consumption. Also, in common with the requirements of OLED displays, OLED lights should not contain hazardous substances, must be simple to operate, and must exhibit fast on/off response.


The latest dimmable, colour tunable and white tone tunable OLED panels are available in sizes up to about 140mm x 140mm. They offer luminance of approximately 1000 cd/m2 at a colour temperature of 3000k, enhanced by a light extraction film. Power consumption is about 2 Watts. Panels are typically between 3.6 and 8.65mm thick and operating life is over 8000 hours. The white tone is tunable from 2700K to about 6500K, equivalent to bright sunlight.


Using a 3-channel electronic controller, colour can be tuned virtually


66 www.a1lighngmagazine.com


OLED?


Jeanine Chrobak-Kando, Business Development Manager for LED lighting at Verbatim gives the lowdown on OLEDs


instantaneously. The emotional impact of a lighting scheme based on OLED panels can be changed to reflect the environment. Therefore, the possibilities for domestic and commercial environments are unlimited. OLEDs are not yet ready to replace general indoor lighting. However, their development has reached the stage where they complement ambient lighting and task lighting, to produce beautifully balanced lighting schemes. Their potential in retail environments and public spaces is unlimited and their low power requirements meet the demands of the most ardent environmentalists.


Contact:


Verbatim www.verbatimlighting.com


“OLEDs need a large emission surface to be suitable for lighting applications. The quality of light is important, and low power operation is vital in a world focused on reducing energy consumption.”


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