IRVINE, CALIF. Toshiba America Electronic Components Inc. last week unveiled a line of visible surface-mount device (SMD) light-emitting diodes consisting of both diffused- and clear-lens types for the automotive market.
Toshiba claims to be the first com-pany to offer the diffused-lens type. Thanks to the uniform light pattern, a diffused lens is ideal for instrumentation and switch lighting. The 1102 series consists of 11 diffused-lens diodes; the 1100 series consists of 11 clear-lens diodes.
The LEDs are said to be among the brightest offered in the industry, with up to 650 mililcandelas typical at a peak wavelength of 562 to 636 nanometers.
With the newly designed diffused lens and its dome lens design, the 1102 series enables a higher level of luminance to be focused on a target surface, according to the company. The diffused light pattern allows the LED to illuminate a specific area, something that the nondirected flat-top lenses found with traditional LEDs do not.
"The diffused-lens LED is very meaningful to the automotive industry because of its unique lens design," said Malcolm Wood, business development manager for Toshiba's optoelectronic products. "It provides a focused viewing angle, which directs the light output in an even pattern for both interior and exterior automotive applications." The combination of focused viewing angle and diffused emission pattern "allows designers to use fewer diodes than needed in previous designs, while still achieving the illumination needed," Wood said.
Toshiba's new SMD LEDs are primarily targeted toward use in interior designs in automobiles, such as backlighting and switch illumination. They can also be used in exterior applications that include the CHMSL and turn signals, the company said. Additional applications include audio, climate control and other indicator backlighting.
The diffused lens is offered in a 2.8-millimeter-diameter lens type. The clear lens is offered in a flat-top type.
Both LEDs have an extended temperature range for operation and storage of -40 degrees C to 100 degrees C, meeting the needs of the automotive market. The LEDs are processed using a four-element indium gallium aluminum phosphide method.
The diodes are offered in a large SMD package measuring 3.2 x 2.8 x 1.9 mm, with a low power consumption and a forward voltage of 2 to 2.8 V.
Pricing with both lens types starts at around 20 cents apiece for volumes of less than 100 pieces. They are available in a standard embossed taping at 500 pieces per reel for the diffused-lens type (the TLxx1102 series) and 1,000 pieces per reel for the flat-top lens type (TLxx1100 series). Samples and production quantities are available now.
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EETInfo No. 609