UNIVERSITY of CALIFORNIA, SANTA BARBARA

Brief Description

A high efficient LED with enhanced luminous efficacy for optoelectronic applications.

Background

Conventional LEDs have used a high reflectivity mirror in order to increase the front emission by reflecting the LED light forward. However, this reflected emission is always partly re-absorbed by the emitting layer, reducing the efficiency or output power of the LEDs. 

Description

Researchers at the University of California, Santa Barbara have developed a light emitting diode (LED) in which the multi directions of light can be extracted from the surfaces of the chip before then entering the shaped plastic optical element and subsequently extracted to air. The present invention combines the high light extraction efficiency LED chip with shaped phosphor layers to increase the total luminous efficacy of the device.

Advantages

• Minimizes the re-absorption of LED light
• Minimizes the internal reflection of LED light
• Increases the total luminous efficacy of the device
• Increases light output power of the LEDs
• Extracts more light out of the LEDs

Applications

• LEDs manufacturing
• Optoelectronic applications 

 

This technology is available for licensing on a non-exclusive basis.

PATENT STATUS

• U.S. Patent 7,687,813 issued on 30 Mar, 2010

INVENTORS

• DenBaars, Steven P.
• Nakamura, Shuji

Other Information

Contact

Franco Caporale/ caporale@tia.ucsb.edu / tel: 805-893-2073. Please reference Tech ID #19168.