Seoul Semiconductor manufactures and packages light-emitting diodes (LEDs) for the automotive, lighting, appliance, mobile, signage and backlighting unit (BLU) markets. The company is the fifth largest LED supplier in the world, with more than 10,000 patents and extensive LED technology and production capabilities, such as "nPola" deep UV LEDs and the world's first "Acrich" AC LEDs in commercial production.