LED Lighting

University of Cambridge micro-LED spin-out Porotech has raised £3m to develop its production technique and its supply chain ecosystem. Despite only spinning out in January 2020, Porotech claims to have been generating revenue for 10 months and be “working with some of the biggest global names in display technology” –  the company launched a commercial native red InGaN LED epi-wafer for micro-LEDs ...

Toshiba has updated its solid-state lidar, claiming the world’s smallest physical volume. A key improvement is within the silicon photo-multiplier (SiPM) light receiving integrated circuits which have light-receiving cells controlled by transistors. The new chips have smaller transistor modules, replace buffer layers protecting the transistors with newly-developed insulating trenches between the transistors and the light-receiving cells (diagram right). To recover ...

Gaggione has introduced a set of low-profile optics for wall washing and zoom beam applications . Branded ‘Ultra Flat Optic’ – or UFO – there are 45mm diameter asymmetric (wall washing, top photo) or zoom versions, plus a 67mm zoom version. To keep height down, the rears have Fresnel-like structures (left) to gather light. Total height from the led emissive ...

Rohm is offering 2cd from a 1.6 x 0.8 (‘1608’ = ‘0603’ = 1.28mm2) led. Called CSL1104WB, forward voltgage is 2.9V ar the rated 20mA. Max current is 40mA. Operation is over -40 tp +110°C. “The products are optimised for applications requiring high brightness white light emission such as IoT devices, drones and other battery equipped applications,” said the company, pointing ...

In a world where mid-power and CoBs seem to be dominating in lighting, it is refreshing to see a high-intensity 1mm die power leds appear – in this case Cree’s lens-less XLamp XP-P, which comes in the 3.45 x 3.45mm XP package. “With up to 700 lm available at max current, the XP-P enables tighter beam angles and much longer throw ...

Melexis has introduced a 16 channel RGB LED driver for vehicle interior lighting, capable of real-time colour drift compensation to a delta UV of <0.01% “to eliminate any distinguishable differences between LEDs”, claims the company. What measurement technique does the device, called MLX81117, use to get such close compensation? “It is basically a very exact measurement of voltages and, or, ...

EPC has announced a laser driver that integrates a 40V 10A GaN power switch with a differential input gate driver. Called EPC21603, its inputs are LVDS (low-voltage differential signalling) compatible – allowing it to be driven by an FPGA in applications where noise immunity is critical. The similar chip, the single-ended input EPC21601 was introduced last month. “This family of GaN integrated ...

Nichia is claiming better colour rendering without loosing efficacy with technology it has banded ‘H6’. “Indeed, the H6 series delivers a colour rendering index of 90 while maintaining a level of efficacy seen in standard CRI 80 leds,” it claimed. It takes advantage of a red narrow band phosphor, as well as semiconductor and package changes, to “achieve a colour quality better ...

Researchers at University College London have created an OLED that can be applied to skin like a children’s transfer tattoo. So much like a child’s transfer is it, that it is made on the same type of substrate and applied the same way: wet it, stick it, and peel off the backing paper. The OLED starts life as a sheet ...

Gaggion has removed the moulding sprue from the alignment edge of its LLC25x colour-mixing collimator range, so they will now sit flush on a flat mounting annulus, with no need for a notch. These are 32mm optics, with non-chip-imaging characteristics to create even beams from single or multi-chips RGBW, tunable white or standard white leds. See the link above for characteristics. ...