Twice the flux density from small-outline RGBW LED emitters

February 19, 2016 // By Graham Prophet
Claiming a new standard for their performance - twice the brightness without increasing fixture size – and aimed at applications such as narrow-beam stage and architectural lighting, LED Engin, Inc. has added a 4-die, high current, RGBW flat lens LED emitter.

In the LZ4-04MDPB emitter each individually addressable green, blue and white die can be driven at up to 3A and the red die up to 2.5A from the same 2.15 x 2.15 mm light emitting surface as its predecessor. It produces everything from tungsten-effect white lighting to a full spectrum of brilliant colours in fixtures such as moving heads with zoom optics, directional effect lighting and wall washes.

The emitter, which has a 7 x 7 mm footprint, dissipates up to 40W thanks to a thinner, 4-channel, multilayer ceramic substrate which cuts thermal resistance to 0.9 °C/W.

It has a lower profile substrate and thinner flat glass lens than the previous version. Secondary optics can therefore be positioned closer to the surface, maximising coupling efficiency to deliver powerful illumination from fixtures with tightly controlled beam widths down to 4 degrees. Fixture designers can adopt the same secondary lenses and optical design used with existing LED Engin flat-top RGBW emitters, providing the lenses are rated for the increased temperatures that result from higher power operation.

The performance of the LZ4-04MDPB emitter has been achieved by developing a thinner, 4-channel, multilayer ceramic substrate. This facilitates better heat dissipation, allowing each die to be driven to a higher current without compromising reliability or operating life.

LED Engin;