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“Remote Phosphor” IP

There seems to be a lot of confusion and noise in the solid-state lighting industry regarding the so-called “Remote Phosphor” technology and related intellectual property (IP). Although the idea of a remote phosphor in lighting is nothing new and is widely used in fluorescent lamps and other phosphor-based lamps and display products, the use of a remote phosphor in LEDs is relatively new. The initial and still preferred usage of phosphors in solid-state lighting involves pre-mixing with a polymer and directly depositing the phosphor particles on the LED chip. This conventional method is currently used for a variety of reasons, but primarily due to its lower cost. However, this traditional approach results in lower wall plug efficiency (WPE) due to optical scattering losses and light trapping within the phosphor/polymer matrix. Furthermore, as LED power increases, this method becomes more limited due to the significant thermal and optical load on the phosphor, which leads to further drop in efficiency and performance at higher temperatures and power densities. Therefore, the remote phosphor approach becomes more attractive, but requires more materials and, potentially, higher cost.

PhosphorTech has been developing remote phosphor technologies and products since its inception in 1998 and has one of the earliest known IPs in this area involving an LED and a phosphor compound, with a priority date as far back as May 2003 (US6982045, Claims 10,12,&13), as well as other follow-up patents (e.g., US0082288, Claims 1-20).

The RadiantFlex technology is a direct result of over a decade of research in various remote phosphor application methods, phosphors, and substrate materials. This is evident in the superior performance of RadiantFlex compared to any existing commercial product, not just in terms of luminous efficacy, but also a variety of other performance and cost factors.

We invite you to try these products risk-free with the full confidence and backing of a strong IP position and a patent-pending low-cost manufacturing process. We believe that our unique RadiantFlex manufacturing process will revolutionize the “Remote Phosphor” technology and will soon make this approach far more superior in terms of lumens/dollar compared to even the conventional chip-level phosphor coating process.

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