Palo Alto, Calif. Agilent Technologies Inc. has expanded its line of extra-bright indium gallium nitride (InGaN) LEDs for the outdoor electronic sign and signals market by adding new devices in 4 mm (T-1) and 5 mm (T-1 3/4) domed through-hole packages with oval-pattern lamps. Touted as the company's brightest InGaN LEDs, the combination of high brightness and weather-resistant packaging with an oval radiation pattern makes these LEDs suitable for applications such as full-color outdoor video displays, stadium scoreboards and other variable message signs.
The 5-mm HLMP-AB86/87 and HLMP-AM86/87 LEDs, available in InGaN blue and green, offer a luminous intensity of 520 millicandelas (mcd) minimum and 1500 mcd maximum for blue at 20 mA, and a luminous intensity of 2500 mcd minimum and 7200 mcd maximum for green at 20 mA. The LEDs are suitable for 15- to 34-mm full-color pixel assemblies. The viewing angle is 30 degrees x 70 degrees oval.
The 4-mm HLMP-LB17/LM17 LED is designed for 12- to 18-mm full-color pixel assemblies and offers a viewing angle of 40 degrees x 100 degrees. It provides a luminous intensity of 400 mcd minimum and 1150 mcd maximum for blue at 20 mA. The luminous intensity for green at 20 mA is 680 mcd minimum and 1900 mcd maximum.
The oval-shaped radiation pattern casts a wider field-of-view with a higher luminosity than standard LEDs, which make them suitable for outdoor applications, said the company. The 470 nm typical dominant wavelength for blue and 521 nm typical wavelength for green are suitable to color mixing in full-color signs.
The company said its blue and green LEDs are based on the most efficient and cost-effective flip-chip InGaN material technology, and feature the company's advanced through-hole packaging technology to ensure maximum light extraction from the die. The die is attached within the reflector cavity, and the cavity is encapsulated by Agilent's proprietary epoxy ultraviolet-resistant blend, said the company. This means the lamps perform with high reliability over the -40°C to 85°C temperature range and are protected from UV radiation and humid environments.
Pricing of the Agilent extra-bright oval-pattern LED lamps is $0.40 each in quantities of one million units. Delivery is four weeks. Samples and production quantities are available through Agilent's direct sales channel and worldwide distribution partners.
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