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Linear Tech prepares for matrix headlights

Linear Tech headlight

Linear Tech has created a control chip for matrix headlights. In a nutshell, the LT3965 shorts out up to eight individual leds in a series string, controlled over an I2C bus. On-chip by-pass switches are 17V 330mΩ nmos fets. According to Linear, that means one fet can switch up to four leds in a series string driven up to 500mA, and fet ...

LED approches HIDs for car headlamps

30sep15-Osram-Oslon-Black-Flat-prototype-600-300x217.jpg

Osram has revealed a 2,000lm LED for automotive headlights. There is more detail on Oslon Black Flat S on Electronics Weekly’s news website. 2,000 lm puts it well above halogen incandescent sources and towards HID sources – although top-end discharge (‘xenon’) lamps are still much higher – Philips’ Vision Xenon 35W (85V) HID car headlight bulb is claimed to deliver 3,350 lm (±300 lm) ...

Ford adds active safety spotlight to headlight beams

Ford-active-headlight-244x300.jpg

Ford is developing two automotive front lighting technologies aimed at improving safety on unlit roads at its R&D centre in Aachen. One for the near future apparently is a system which can widen the headlight beam at junctions and roundabouts. The system interprets traffic signs to better illuminate hazards that are not in the direction of travel, and uses GPS ...

Led for automotive head-up displays

Osram head up

Osram is aiming at automotove head-up displays with an led colour-coordinated with TFT displays and viewing white point requirements. Called Oslon Compact CL, is has a 1mm die. “A ceramic converter ensures that the colour locus remains constant even at high temperatures,” said the firm. “The quality of a head-up display depends largely on the light source used. TFT displays ...

Where are the rectangular die?

Osram Oslon Black Flat 600

If optic diameter is important, forming letter-box beams is such a struggle, that the likes of Lumileds, Cree and Osram should make some nice rectangular die. Only my opinion of course, fuelled by my attempts to make anti-dazzle bicycle lights, but I am sure designers of wall-washers and other fan-beam luminaires would soon make used of them. Osram and Lumileds ...

SMD leds for automotive light guides

Osram Synios

Osram has introduced a range of leds for feeding light guides in automotive external lighting. All the packages have the same 2.7 x 2.0 x 0.6mm external characteristics, despite the range of die colours and die sizes available. Called Synios P 2720, the family is aimed at daytime running lights, position lights, and tail light clusters. Die are either 500µm, ...

Philips gets excited about Lumileds merger

Philips Automotove Lumileds

Philips is really keen that everyone should know that it is combining its automotive and led (Lumileds) businesses, and it looks like it is happening on the 1st of April. This should be interesting because, after a great start, Lumileds appeared to take its eye of LED headlights, leaving Osram in the lead – so expect demonstrations of prowess. To ...

Lumileds’ automotive front-lighting LED

Luxeon F

Lumileds has revealed more details of its Luxeon F automotive forward lighting led. Announced more than a year ago, it is a small (1.9×2.3mm) lens-less surface-mount single-die ceramic-tile device. Now an application brief, product brief and data sheet have appeared. “Luxeon F is hot binned at 85°C DC, consistent with actual automotive operational environments. Lumileds automotive binning structure meets both ...

Plastic heatsink in Hella LED spotlight

29jan14HellaNine 400

Automotive lighting firm Hella is using plastic heatsinks in a range of work-lights for agricultural use. “Thermally conductive plastics are used in place of aluminium heat sinks. A key advantage over aluminium is their corrosion resistance, and the products are also lighter,” said the firm, which is also using glass fibre reinforced plastic bracket in the lights. The lights are: ...

LED headlamp springs from new Osram LED

04sep13ostarHeadlampD 300

With help from Osram Opto, Missouri-based Peterson has developed an all-LED replacement for standard 7in (175m, PAR56) headlights. It uses two five-die versions of Osram’s Ostar Headlamp Pro – an updated version of the earlier non-Pro Ostar Headlamp with better heat management and environmental sealing. It looks like only left-hand drive vesions are being made. I am first in the ...