Red LEDs provide more efficient illumination

Increased efficiency is derived from both an improved shape and arrangement of electrodes and an improved chip surface treatment.

SDK has begun commercial shipments of ultrabright AlGaInP red LED chips reckoned to have the highest luminous efficiencies available.

The rating of 80 lumen/W represents a 40% improvement over the company's existing grade.

The increased efficiency is derived from both an improved shape and arrangement of electrodes and an improved chip surface treatment.

This will enable designers to reduce the number of LED lamps while maintaining the same level of brightness, contributing to energy conservation.

To date, AlGaInP ultrabright LED chips have been mainly used in outdoor displays.

New applications include automotive rear lights and interior lighting as well as backlighting for LCD TVs.

To meet growing demand, SDK will further improve the brightness of its AlGaInP ultrabright LED chips and provide them in a range of colours, such as red, orange, yellow and yellowish green, and in a wide variety of sizes as required by customers.

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