Blue LEDs shed light on displays

Edited by the Electronicstalk editorial team Sep 16, 2002

The small size and low power consumption of three compact new surface-mount blue LEDs make them ideal for lighting and illumination applications in compact, portable products.

The small size and low power consumption of three compact new surface-mount blue LEDs make them ideal for lighting and illumination applications in compact, portable products.

The three LEDs feature low voltage operation for low power consumption and a narrow forward voltage range (2.75 to 3.15V) for better colour and brightness consistency.

The right-angle surface-mount configuration of the QTLP610CEB and QTLP611CEB LEDs makes them ideal for edge lighting LCDs and other status indicators in cell phones, PDAs and other portable communications and electronic devices.

Likewise, the low profile, surface mount configuration of the QTLP601CEB makes it ideal for backlighting keypads, pushbuttons, and LCD displays in the same type of devices.

All three Fairchild LEDs have distinct advantages over conventional cold-cathode fluorescent and electroluminscent lamps for illumination in compact devices: they are smaller, more reliable, use DC (rather than AC) supplies, and do not require auxiliary circuitry.

In addition, low-voltage operation and a narrow forward voltage range make the Fairchild LEDs preferable over similar-sized surface-mount blue LEDs for portable devices.

The QTLP610CEB and QTLP611CEB are right-angle surface-mount LEDs.

The QTLP610CEB measures 3.0 x 2.0 x 1.0mm with a 120-degree viewing angle, and the QTLP611CEB measures 2.1 x 1.0 x 0.6mm with a 130-degree viewing angle.

The QTLP601CEB is a 0603 PCB-based surface-mount package footprint that measures 1.6 x 0.8 x 0.6mm with a 100-degree viewing angle.

All three components use an InGaN/sapphire blue LED, water-clear optics, and are available in 8mm-width tape on 178mm-diameter reel with 2000 units per reel.