The present invention relates to the technical field of radiation curing photopolymerization initiator, and particularly to an environmentally-friendly new oxidation process for converting several specific aryl-1,2-diol compounds to corresponding arylhydroxyketones. The TV board is mounted on a rear surface of the liquid crystal display panel to receive a TV signal and control an image outputted from the liquid crystal display panel. A transmitting antenna transmits information on the type of each of the configured DL Cs to the relay node. The video projector must be able to project the video image of an actual pitcher onto the projection screen.