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IR LED from Osram offers remote control capability

Posted: 11 Apr 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Osram Opto Semiconductors? LED driver? infrared? PCB? smartphone?

Osram Opto Semiconductors has rolled out what it boasts as the company's first flush-mountable infrared LED that allows remote control functionality to be incorporated in a lower profile. The T-shaped SFH 4140 Midled protrudes 0.6mm above and below the board thereby offering remote control functions in a small space. It claims to offer high radiant intensity and enables an infrared transmitter to be integrated in extra-thin smartphones or tablets.

For the first time, Osram Opto Semiconductors has succeeded in sinking a surface-mountable infrared LED in a PCB. "We want to enable our customers to install a powerful infrared transmitter even if there is very little height in the device to work with", explained Bianka Schnabel, the person responsible for the product at Osram Opto Semiconductors. "We have therefore developed a transmitter that disappears almost entirely into the board."

SFH 4140

The T-shaped transmitter takes up 4.6mm2 of board space and emits a focused beam to the side. The beam angle of ±25 degrees is created by an integrated reflector, a real plus point in terms of space requirements. The SFH 4140 produces an impressive 50mW/sr as its typical radiant intensity from 100mA so it achieves the ranges needed for remote control functions. The wavelength of 940nm is also perfect for meeting the requirements of this application, added the company.

This component is Osram Opto Semiconductors' contribution to the trend of turning smartphones and tablet computers into universal remote controls, particularly for home entertainment electronics. If the device is equipped with the appropriate infrared transmitter diode then the diode can be controlled with a suitable app. Whereas classic remote controls traditionally use radial infrared LEDs, this option is not attractive for slim smartphones and tablets which need a low-profile SMT solution that can operate over the required distance.

- Paul Buckley
??EE Times Europe

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