LED Lighting

Cree has stretched the output of its 1.6×1.6mm XQ LED package. Called XQ-E, the device gets the 1mm die from its XP-E2 LED, and a domed XQ package with a 110° output. “Optically it is actually the same as XP-E2,” Cree marketing manager Paul Scheidt told Electronics Weekly. “It is a much smaller building block to mix for colour-change because ...

Lumileds has introduced Luxeon Q, a lighting LED in a standard 3535 surface mount package. Using the firms flip-chip die, claimed efficacy is 135 lm/W at 5,700K 70 CRI and 115 lm/W at 3,000K 80 CRI (85̊C, 350mA). “Our LED is especially competitive when it’s driven harder. For instance, at 1A, a flux of more than 300lm at an efficacy ...

Osram Opto has introduced a new variant of its Ostar Headlamp Pro LED, with five individually addressable die. By turning die on and off independently, rather than having all five on all the time, the headlamp beam can be widened and narrowed depending on driving conditions. Done automatically moment by moment, this allows a simple form of ‘advanced forward lighting ...

Osram Opto has introduced a two chip version of its Oslon Black Flat automotive lighting LED, effectively introducing a second-generation of headlamp LED packaging. While it’s first-generation Ostar Headlamp products are very much designed not to scare the conservative automotive industry – they are bolt-down ceramic tiles for with solder pads for flying leads – Oslon Black Flat is surface-mount, ...

Cree has doubled the intensity of its 9mm diameter source LED lighting array. Part of the firm’s CXA range, the CXA1520 “doubles the system intensity of spot lights compared to previous arrays”, said Cree. It “enables lighting manufacturers to create a new generation of products that delivers the same intensity and light quality as 39W ceramic metal halide”. The firm ...

The market size for high brightness (HB) LEDs is expected to reach $20.2bn by 2015 – a CAGR of 30.6% from 2012 (according to Strategies Unlimited). One of the key application areas driving this significant growth factor are the LEDs used to backlight thin film transistor (TFT) liquid-crystal displays (LCDs). Applications range from high definition (HD) TVs and portable tablet ...

Researchers at the US Rensselaer Polytechnic have proven a link between LED efficiency drop at high current and carrier mobility. Better lighting LEDs could result. “Efficiency droop, first reported in 1999, has been a key obstacle in the development of LED lighting for situations, like household lighting, that call for economical sources of versatile and bright light,” said the university. ...

US automotive firm Peterson Manufacturing entered the LED headlamp market with an all-LED main/dip replacement for 7inch (PAR56, 175mm) headlights, based on new Osram LEDs. Called 701C, it uses two Ostar Headlamp Pro LEDs, firing sideways into separate main and dip reflectors. With a move to a Pro version, Osram has done away with the glass die cover used in ...

 Vishay has developed high-speed high-power IR LEDs for gesture remote control. The 940nm devices emit 40mW/sr of radiant power with 100mA drive over +/-18° vertical and +/-36° horizontal (to half intensity. “The device’s unique angular distribution makes it ideal for gesture remote control of televisions and gaming systems, where it provides excellent spectral matching with silicon photodetectors,” said the firm. ...

LED driver designs can deliver flicker-free and fast startup dimming performance while still providing high power factor and efficiency, writes Rich Miron Dimming performance of LED lamps in legacy TRIAC-based dimmers is one of the biggest challenges for LED lighting designers. In many cases, this causes flickering and reduced dimming range compared to incandescent bulbs. The problem is that TRIAC-based ...