Sharp offers more efficiency, luminous flux for Pico Zenigata LED line

March 20, 2012 // By Christoph Hammerschmidt
Sharp rounds off its Pico Zenigata LED portfolio with a new white high-performance LED series while increasing the luminous flux of the previous generation in parallel. The line-up now comprises three different series that shine with luminous flux levels of up to 72.5 lumen and with an efficiency of up to 125 lm/W.

With just a single LED, the types of the GM2BBxxQK1C series achieve luminous flux levels of up to 24.5 lumens and an efficiency of up to 125 lm/watt. Luminous flux and efficiency of the other two series were improved accordingly: above all the GM2BBxxQKAC (2 LED dies) reaches up to 46.7 lumens with an effective power of up to 120 lm/W; the GM2BBxxQK0C (3 LED dies) radiate up to 72.5 lumens at an efficiency level of up to 120 lm/W. All three series are available with a typical CRI value of 83. The high colour rendering (HCR) LEDs achieve the high CRI level through a combination of blue LED dies with a special mixture of green and red phosphor.

Even without secondary optics, the Pico Zenigata LEDs provide suitable light for energy-efficient lighting. The light conversion layer of the Pico Zenigata LEDs is based on a two-phased development procedure especially developed by Sharp for this purpose. A layer of phosphor for the conversion of white light is applied in a first step. In a second step, installation of the globe top made from transparent silicone enables light extraction without any spreading loss.

As a LED substrate, Sharp therefore uses a ceramic plate with silicon sealing instead of conventional plastic materials. This allows efficient heat dissipation and helps to keep the required cooling element small. The Pico Zenigata family also exhibits a long-term illuminating power. After 50,000 hours, the lumen degradation amounts to only 5%, substantially less than conventional illuminants.

The Pico Zenigata LEDs, which are solderable according to the reflow method, are scarcely bigger than the head of a match. Thanks to its low space requirements of 2.8 x 2.8 x 1.9 mm, they are predestined for use in a variety of application areas that require a high degree of brightness in combination with compact design. The minimal form factor and the high CRI value of the new Pico Zenigata