Abstract: A circular display includes a carrier and a display medium layer that is located on the carrier. The display medium layer has two display edges opposite to each other. The carrier has two carrying edges opposite to each other. The display edges are respectively aligned to the carrying edges. The carrier and the display medium layer are bent together to form a closed ring. The display edges of the display medium layer are connected to each other. The carrying edges of the carrier are connected to each other.

Abstract: An active electromagnetic pen includes a pen body, a pen tip, a pressure detecting module and a power supply module. The pen body has an opening on one end thereof. The pen tip is disposed at the opening of the pen body. The pen tip has a tip end and a plane end opposite to the tip end. The tip end is disposed in the pen body, and the plane end is extended to outside of the pen body through the opening. The pressure detecting module is disposed in the pen body and includes a plurality of pressure detecting elements. The pressure detecting elements are respectively connected to different locations of the plane end of the pen tip. The power supply module is disposed in the pen body and is electrically connected to the pressure detecting module.

Abstract: A circular display includes a carrier and a display medium layer that is located on the carrier. The display medium layer has two display edges opposite to each other. The carrier has two carrying edges opposite to each other. The display edges are respectively aligned to the carrying edges. The carrier and the display medium layer are bent together to form a closed ring. The display edges of the display medium layer are connected to each other. The carrying edges of the carrier are connected to each other.

Abstract: An active stylus includes a tube, a signal emitting module, a power module, an electrical energy storage device, a movable element and an energy transformation module. The signal emitting module, the power module, the electrical energy storage device and the energy transformation module are disposed in the tube. The power module is electrically coupled to the signal emitting module, and the electrical energy storage device and the energy transformation module are electrically coupled to the power module. The movable element is movable in the tube. The energy transformation module is configured for transforming energy generated by motion of the movable element into electrical energy. The electrical energy transformed by the energy transformation module is stored in the electrical energy storage device by the power module.

Abstract: An active stylus includes a tube, a signal emitting module, a power module, an electrical energy storage device, a movable element and an energy transformation module. The signal emitting module, the power module, the electrical energy storage device and the energy transformation module are disposed in the tube. The power module is electrically coupled to the signal emitting module, and the electrical energy storage device and the energy transformation module are electrically coupled to the power module. The movable element is movable in the tube. The energy transformation module is configured for transforming energy generated by motion of the movable element into electrical energy. The electrical energy transformed by the energy transformation module is stored in the electrical energy storage device by the power module.

Abstract: An active electromagnetic pen includes a pen body, a pen tip, a pressure detecting module and a power supply module. The pen body has an opening on one end thereof. The pen tip is disposed at the opening of the pen body. The pen tip has a tip end and a plane end opposite to the tip end. The tip end is disposed in the pen body, and the plane end is extended to outside of the pen body through the opening. The pressure detecting module is disposed in the pen body and includes a plurality of pressure detecting elements. The pressure detecting elements are respectively connected to different locations of the plane end of the pen tip. The power supply module is disposed in the pen body and is electrically connected to the pressure detecting module.