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Single-device GaN-based LEDs For White Lighting and Full-Color Applications
Jiangsu Center of International Technology Transfer
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New Energy and Energy Efficiency>Solar Energy,Environment Protection and Resouces Utilization>Environmental Monitoring and Protection
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LEDs (light-emitting diodes) play an increasingly important role as light sources, including instrument panels, indoor and outdoor displays, and traffic signals. Recent advances in optoelectronics provide efficient LEDs capable of a wide range of output colors. However, current techniques to produce white-light LEDs yield complex devices that are difficult and costly to manufacture.
Researchers have developed methods and structures for single devices with several individual-wavelength-emitting LEDs. These single optoelectronic devices emit full-color or white light and achieve efficient output using a simple, low-cost design.
ADVANTAGES: This technology permits fabrication of single devices that emit white or multiple-color light.
High efficiency output; Single-device design simplifies fabrication and decreases cost;
Good reliability, temperature stability, and heat dissipation properties;
Fully integrable with current processing techniques.
Compact white or multiple-color light sources for displays and other devices;
Energy-efficient white lighting.
US Patent No. 5,795,798 issued August 18, 1998