LED Lighting

Plymouth-based Plessey has revealed green-emitting micro-LEDs made on a planar gallium nitride on silicon (GaN-on-Si), whose light is not made by phosphor conversion. “To produce green light, LED manufacturers typically apply phosphors or quantum dot conversion materials to native blue LEDs. These materials then convert short wavelength, typically 450nm blue, to red or green wavelengths with typically 10% to 30% ...

Nexperia has extended its constant current LED driver family with eight new AEC-Q101 qualified devices that deliver up to 250mA. The 16V NCR32xx and 40V NCR42xx series are available in two package styles, the smaller SOT457 (SC-74) or higher power SOT223 (SC-73) – the latter which works up to 1.25W. Output is stabilised at 10mA without an external resistor, and ...

Lights are the most prevalent electrical components in any commercial building, and that makes them the most logical devices for smart building sensors, according to Russ Sharer, vice president of global marketing and business development at Fulham. “In new construction you can plan to use standalone smart building control sensors, but only 8% of commercial space is new construction. However, ...

Vishay has announced an AlGaN mid-power ultra-violet LED for water purification, air purification, surface sterilisation, medical disinfection, and portable sanitisers. Called VLMU35CM00-280-120, it comes in a 3.5 x 3.5 x 1.2mm surface-ceramic mount package with a quartz window. Because of this construction, the firm is claiming “extremely long lifetime” – however, nowhere in the data sheet nor the product page can I find any ...

Osram has released a green laser for phone-based projectors, capable of delivering 140mW pulses. Although a projector also needs red and blue lasers, green is the colour that poses the greatest challenges in semiconductor laser and LED production. “Up to now, RGB laser projections for smartphones, based on a red, green and blue laser, often had brightness problems,” according to ...

Osram has released the second generation of blue multi-mode laser diodes for car headlights, doubling range in auxiliary high beams compared to with its previous lasers, to 600m, it claims. What lasers offer over LEDs as a light source is higher light output per unit area (luminance) – which then allows a slimmer smaller optical chain for a given final ...

Osram is aiming at farmers, horticulturists and viticulturists with a broad-band near-infra-red LED for in-field reflection spectroscopy. “One of the most important decisions that farmers and vineyard owners have to make involves getting the timing right for the harvest,” it said. “Simply scanning fruit or cereal crops with the near-infra-red LED installed in a smartphone or tablet produces reliable information ...

Vishay has introduced a series of 1Mbaud (2MHz NRZ) optocouplers with built-in Schmitt trigger and open collector output. Called the VOH1016A series, the typical input current for output turn-on is 650μA (2mA max required) with guaranteed on-off threshold hysteresis – I(off)/I(on) is between 0.5 and 0.95, typically 0.9 (Vcc 5V, 280Ω load). Output stage supply voltage range is 3-15V (at 550μA ...

Selectronic, the Witney LED specialist, and Hongli Zhuihui of Guangzhou, China are to collaborate with Epistar of  Hsinchu, Taiwan to boost product development in the automotive LED sector. Selectronic are partners and European distributors of LEDs for market leaders Hongli Zhihui Group. “Partnering with the Taiwanese company Epistar forms a strategic alliance aimed  at harnessing resources from both sides to ...

Automotive product announcements appear to be dominating the Electronica build-up, and Osram is no exception as it will be revealing details of its intelligent RGB LED for vehicle interior lighting. Read our full Electronica 2018 coverage » Part of the Osire product family, E4633i, includes three LED die – red, green and blue – as well as a serial control ...