A withstand voltage against electrostatic discharge of a high voltage MOS transistor is improved. Phosphor particles are arranged in a densely packed layer within the coating at the light emitting surface, and such that the light emitting surface is in contacting relationship with the phosphor particles. It can manage large scale network through hierarchical configuration of numerous network management stations and classification of the management domains. The set of interaction options is initiated based upon the detected presence of the chargeable device on the charging surface and the identified device type and, the output signal is presented on a display of the charging device.