Colour harmony plays an important role in fine arts, architecture and design. But it can be also important to describe the quality of light sources: the distortion of perceived colour harmony of a set of colour samples under a light source can be a relevant factor by ranking the perceived colour quality of different light sources. In an earlier experimental study[1], we came to the conclusion t...

Abstract The photoelectric properties of LED are affected by driving current and ambient temperature. To solve the problem light wane caused excessive overheating, LLC resonant converter with soft switching was chosen as main topology, improving power efficiency, reducing heat driver. Firstly, soft-switching conditions analyzed, constraint equation is obtained. Then, an improved particle swarm ...