White LED Offers Broad Temp Range And Color Yield

April 2, 2001
The TLWA1100 white LED points the way to a stable, white light source with the luminosity required for future replacement of incandescent lamps. Set to be launched by Toshiba America Electronic Components Inc. (TAEC), it realizes a short wavelength...

The TLWA1100 white LED points the way to a stable, white light source with the luminosity required for future replacement of incandescent lamps. Set to be launched by Toshiba America Electronic Components Inc. (TAEC), it realizes a short wavelength light source by reducing the indium in an indium-doped gallium-nitride (GaN) emission layer. This excites red, green, and blue (RGB) phosphors in the transparent resin of the device package to output white light.

After the RGB balance of the phosphor layer determines the output color, different colored outputs may be achieved through modified phosphor balance. Emission light from the LED does not contribute to the white color. According to the company, the phosphors in it offer excellent performance in terms of operating temperature range and color yield.

Measuring 3.2 by 2.8 mm, the TLWA1100 uses a surface-mount device with a typical luminosity of 100 mcd at 20 mA. It employs 4.5 to 5.0 lm/W at 20 mA and runs at 6500 to 9000 K with operating and storage temperatures of −40°C to 100°C. The TLWA1100 also integrates Toshiba's phosphors and packaging with Toyoda's LED, which achieves a short peak wavelength.

Samples will be available this month. Mass production will begin in November. Sample prices will range from $1.70 to $2.60.

Toshiba America Electronic Components Inc., 9775 Toledo Way, Irvine CA 92618; (800) 879-4963, ext. 207; www.toshiba.com/taec.

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