LED Lighting

Delo has developed a transparent adhesive for bonding automotive headlights. “Photobond OB4210 is characterised by its yellowing stability at high temperatures” according to the company. “Manufacturers of automotive headlights can use it to realise optically sophisticated applications – the  transparent characteristics make it hardly distinguishable from the lens material.” Transparency is typically retained after a 500 hour storage at +140°C. It ...

Sony Space Communications Corporation (SSCC) and Astro Digital are partnering for the design, manufacture and launch of two micro-satellites.   The Astro Digital satellites will carry an SSCC optical terminal for establishing high data-rate Lasercom links with each other, as well as with terminals on the Earth. The idea is to showcase SSCC’s optical communications technology and help laser communications ...

Lumissil Microsystems is aiming at adaptive beam vehicle headlights with controller for dozens of power LEDs. It is for ‘matrix’ headlights, that have an array of close-packed power LEDs and projection optics that focus that any pattern on the array forwards from the vehicle – allowing headlights to produce arbitrary beam patterns – usually controlled by an on-board forward facing ...

Vishay has stretched an SO-6 package to accommodate 1kV operation from opto-based mosfet and IGBT gate drivers. The body is ~7mm from end to end and creepage is 8mm. Clearance is 7mm for the ‘option 9’ package which has conventionally bent legs, or 8mm for the ‘option 8’ package which has widely-splayed legs (see image). Peak working voltage is 1.14kV ...

Würth Elektronik has revealed two reflective optical sensors. These are simple devices, with an infra-red emitter and a photo-transistor, both facing upwards, but work at an unusual wavelength. “These contain both emitters and detectors for 940nm wavelength,” said the company. The “sensors filter out visible light up to 800nm, rather than just up to 700nm, so they are less susceptible ...

Vishay has introduced a 1 Form A solid-state relay with AEC-Q102 qualification and a 100V load voltage, claiming it to be industry’s first. Packaged in low-profile SOP-4 package (5 x 7 x 2.2mm), VORA1010M4 typically turns on and off in 100μs, and operates up to +125°C. “The fast turn-off time is a result of its integrated turn-off circuit, while its ...

Diodes has introduced a 12-channel constant-current LED driver arranged as four channels of RGB. AL58221 has open-drain outputs that can sink up to 60mA and withstand 24V. Maximum red green and blue currents are set with three resistors, then the individual channels are digitally-modulated to set their brightness. To reduce flicker, adaptive pulse density modulation is used, with diodes claiming ...

Cree LED has up-graded its 1.6 x 2.05mm lens-less XE-G led family, claiming a 20% increase in efficiency for RGBW systems, and a 10% or higher efficiency gain for 13 of the 18 available colors. These devices are intended to be packed closely under colour-mixing optical systems. As such, the gap between emissive surface and package edge is kept small ...

Lumissil Microsystems has created a pair of LED drivers that include a 32MHz 8051 microcontroller. “These new controllers enable lighting engineers to create customised dynamic LED lighting animations tailored to their system requirements,” according to the company. “They feature integrated non-volatile memory to store animation sequences and LED parameters, essential for dynamic lighting effects such as colour transitions, pulsing, fading ...

Cree LED is aiming at portable lighting with a 16,500 lumen multi-die LED in a 10 x 10mm package with a 9mm primary lens (right). Called XFL10K, it has two cousins: the 14,247 lm XFL08K which comes in the same package, but with an 8.5mm lens, and the 7 x 7mm 8,335 lm XFL05K with a 6mm lens. These are ...