Abstract: A USB charging circuit includes a mating hub module including a USB input port for the connection of an external computer and a USB main hub control circuit electrically connected to the USB input port, a power supply module including a power supply device and a synchronization/charge mode switching circuit for detecting the power signal output of the USB input port and outputting a corresponding mode judgment signal, and one or multiple output control units each including a USB charging control circuit electrically connected to the USB main hub control circuit, the power supply device and the synchronization/charge mode switching circuit to receive the outputted data signal, power supply and mode judgment signal and a USB output port for receiving the outputted data signal and power supply from the USB charging control circuit so that connected portable electronic devices can be charged or receive data synchronously.

Abstract: A USB charging circuit includes a mating hub module including a USB input port for the connection of an external computer and a USB main hub control circuit electrically connected to the USB input port, a power supply module including a power supply device and a synchronization/charge mode switching circuit for detecting the power signal output of the USB input port and outputting a corresponding mode judgment signal, and one or multiple output control units each including a USB charging control circuit electrically connected to the USB main hub control circuit, the power supply device and the synchronization/charge mode switching circuit to receive the outputted data signal, power supply and mode judgment signal and a USB output port for receiving the outputted data signal and power supply from the USB charging control circuit so that connected portable electronic devices can be charged or receive data synchronously.

Abstract: An adhesive plate assembly for a sheet object, such as a photograph, advertisement, or the like, has an adhesive layer made of a hard polyvinyl chloride or polyethylene. The upper surface of the adhesive layer has an adhesive coating. A protection layer is removably adhered to the upper surface of the adhesive layer for protecting the adhesive coating from contamination. The sheet object is suitable to be adhered to the adhesive layer by the adhesive coating after the protection layer is removed. A soft layer is connected to the bottom surface of the adhesive layer, and is made of a soft polyvinyl chloride and adapted to be attached directly to and removed from a glazy surface repeatedly.

Abstract: A message board has a surface layer made of a protectively mounted paper or plastic sheet which has a smooth plane adapted to be erasably written thereon with a whiteboard marker. An intermediate mounting layer is overlapped with and connected to the surface layer, and is made of a hard polyvinyl chloride or polyethylene. A base layer is overlapped with and connected to the intermediate mounting layer, and is made of a soft polyvinyl chloride to be attached directly to and removed from a glazy surface repeatedly.