LED ILLUMINATION DEVICE USING AC POWER

摘要

Disclosed is a light-emitting device having a configuration in which all light-emitting elements are designed to always emit light regardless of voltage level when an input voltage is higher than the minimum voltage for emitting light, wherein the light-emitting elements are connected to each other in parallel when the voltage level is low, and the light-emitting elements are connected to each other in series when the voltage level is high.