Cree representative Paul Scheidt also like a Stalker, focused on system level. He says early LED relative to the driver, heat dissipation and optical system, pay more attention to the cost problem, nowadays, the LED in the percentage of the cost of the SSL system has declined steadily for years. He cites several different methods to solve the problem of the cost of the system, such as the use of different types of LED and different system architecture. He thinks that AC – LED technology method may minus the driving part of the cost, but need more LED AC – driven design, because at the same point in time not all leds are driven. He also said that the AC system flickering problem cannot be solved, EMI problems require additional circuit, is essentially a drive integrated circuit. About the power LED, Scheidt said, in many cases, the color of the LED conversion are not satisfied, the problem is that you want a strong drive LEDs, but trying to limit the number of LEDs in system. But Scheidt of the power device in most of the comments are at the plastic package of leds. It is worth noting that, the chemical industry, said the 757 LED actually USES is ceramic composite packaging. The company did not disclose details, but Swenson has previously said that the product provide lumen and color can match the high power LED.
Scheidt finally concluded that, in many applications, such as modification of lamps and lanterns, high voltage, high power LED can provide the best way to system level. He said, these components simplifies the design of the driver, also meet the requirements of the application of light distribution and quality. Some SSL products, such as street lamps and ceiling, use a large number of single launch LED troffers, has always been the driver for the design of high voltage level, these products are very successful, with industry leading SSL systems.