History of Remote Phosphor Technology (RPT)?

 

     The RPT for LED is originated from fluorescent lamps using ultraviolet light to excite phosphors coated on glass and create a white light, which was first commercialized by GE Company in 1938. In LED applications, the ultraviolet light is replaced by a blue light usually ranged from 450-460nm, while the phosphors can be coated on glass or mixed into a polymer binder. As the phosphor structure is thermally isolated from the LED chip, the reliability of the white light is superior to conventional method where the phosphors are applied near to the LED chip and more affected by heat. Advantaged from precisely pre-molded phosphor structures, RPT enables an amazingly high yield for manufacturers' mass production to dramatically reduce cost. In addition, it helps to reduce glaring issue for LEDs by providing CCT consistent wide viewing angle and surface lighting.

 

     Fulight's founder Dr. He has been working on this technology since the year of 2005. In the year of 2007, he developed a special phosphor cap prototype and fully proved all the above claimed advantages of the RPT. In the year of 2009, this RPT prototype was successfully commercialized after a joint-venture had been founded with Nepes LED, Corp. in Korea. In the year of 2011, Intematix Corporation introduced its ChromalitTM remote light sources. The phosphor structures are all made by PC material.

 

     In the year of 2013, Fulight developed a new RPT using a phosphor structure made from optical silicone, which can work under a temperature up to 270°C compared to 150°C only withstood by PC products. As a result, ours lifetime is much longer than that of Intematix's PC type. In addition, thanks to the high transparency of optical silicone (98%), Fulight's RPT improves 10-20% lighting efficiency than Intematix's PC type which has only a ~90% transparency.