LED news and insight from our technology editor Steve Bush, who has been messing with LED lighting for more years than he would care to remember.
Intermatix get patent for red phosphor
Intematix of California has received a patent for its red-emitting, nitride based phosphors.
Covered by US patent 8,597,545, the intellectual property is used in the firm’s XR phosphor family.
The firm claims it can hit a CRI of 98 using these reds and its previously patented aluminumate (‘GAL’ branded) green phosphors (US 8,529,791 for green, and 8,475,683 for a yellow).
“The XR red nitride also leads in colour stability with less-than-perceptible 2SDCM measured colour shift in accelerated aging testing,” claimed Intermatix. “GAL phosphors provide up to 95% lumen maintenance at 200°C phosphor temperature.”
Last november, the firm revealed a 203 lm/W remote-phosphor incandescent-replacement bulb (pictured above) using royal blue Luxeon T/TX leds.
It used a commercially-available 26mm diameter dome shaped remote phosphor developed by Intematix to produce 6,000K and 70CRI “with conversion efficacy of 267 lm per radiant watt,” it said. “The design is applicable for round and linear module configurations and is offered in colour temperatures ranging from 2,700K to 6,000K with CRI values from 70 up to 98.” Wall plug efficiency was claimed to be 76%.