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Tricolor LEDs for backlighting mobile phones and PDAs.

Agilent has introduced two side-firing, tricolor SMT LEDs that permit handset and PDA designers to mix separate red, green and blue light sources in any combination. The devices are intended primarily for backlighting and status indicators in handheld devices. In the Agilent HSMF-C113 and HSMF-C115 side-firing ChipLED devices, the package is mounted vertically, with the light emitted through a lens on the side rather than the top of the package. This simplifies the coupling of the light to a light pipe for backlighting mobile phone and PDA keypads and LCD screens. In handsets and other handheld devices, separate colors can indicate incoming SMS (short messaging system) messages, e-mail and stock news. They can even identify different callers. The HSMF-C113 and HSMF-C115 side-firing tricolor chip-type LEDs feature a four-terminal common anode connection and are housed in a 2.5 mm X 1.0 mm X 1.0 mm package. The HSMF-C113 combines InGaN blue (470 nm dominant wavelength, 60 mcd typical brightness); AlInGaP green (572 nm, 50 mcd); and AlInGaP red (626 nm, 80 mcd) die. All brightnesses measure at 20 mA operating current. The HSMF-C115 uses brighter InGaN green, with 525 nm dominant wavelength and 170-mcd typical brightness. Both versions have diffused optics, are compatible with IR (infrared) reflow soldering processes, and they are certified lead-free. The HSMF-C113 is priced at $0.58 each, and the HSMF-C115 at $1.00 each, both in 1,000-piece quantities. Agilent Technologies.

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Title Annotation:Optoelectronics & Displays
Publication:ECN-Electronic Component News
Date:Aug 1, 2005
Words:253
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