Light emitting diode based lighting device

摘要

A light emitting diode (LED) based lighting device includes a plurality of circuit boards mounted to a base. Each circuit board has a curved or step-like edge contoured in correspondence to a particular curved surface. A plurality of sideways projecting LEDs is mounted along the curved edge of the circuit board. Thus, light from the LEDs is projected along a curved surface thereby particularly suitable for irregularly-shaped lighting devices having curved light projecting surfaces with low costs and simplified manufacturing process.