Abstract: An active stylus, applied to a capacitive touch panel as an input means can include a housing, an induction-coil portion, a penetration portion and a magnetic structure. The induction-coil portion is located inside the housing. The penetration portion located at an end portion of the housing and movably mounted at the induction-coil portion further includes a contact portion protrusive out of the housing to contact the capacitive touch panel. When the contact portion contacts the capacitive touch panel, the contact portion moves the penetration portion and the magnetic structure synchronously so as to generate a relative displacement between the magnetic structure and the induction-coil portion and further to have the induction-coil portion to produce a change of inductance.

Abstract: A capacitive stylus applied to a capacitive touch panel as an input means includes a detection unit, a calculation unit and an output unit. The detection unit is to contact the capacitive touch panel. The calculation unit is electrically coupled with the detection unit. The output unit is electrically coupled with the calculation unit. When the detection unit contacts the capacitive touch panel, the detection unit generates a corresponding inductance-varying value, the calculation unit bases on the inductance-varying value to modulate and generate an oscillation frequency to the output unit, and the output unit bases on the oscillation frequency to output a frequency signal to the capacitive touch panel. Further, an operation system is provided to integrate the capacitive stylus and the capacitive touch panel.

Abstract: An electromagnetic whiteboard pen is disclosed, and particular an electromagnetic whiteboard pen capable of inking and digital inputting simultaneously is disclosed. The electromagnetic whiteboard pen has a marker for writing with ink and a coil for emitting electromagnetic signals. When user writes on an electromagnetic whiteboard by the marker, the coil emitting electromagnetic signals simultaneously. The electromagnetic whiteboard senses the electromagnetic signals to find and record the position and the moving of the electromagnetic whiteboard pen. Therefore, the writing on the electromagnetic whiteboard by inking can be record and converted to be digital signals for storing by the electromagnetic whiteboard when the electromagnetic whiteboard pen writes on the electromagnetic whiteboard.

Abstract: An electromagnetic whiteboard eraser is disclosed, and particular an electromagnetic whiteboard eraser capable of erasing both of the writing written by ink and the writing inputted by electromagnetic induction simultaneously. The electromagnetic whiteboard eraser has an ink eraser for erasing the writing written by ink and a coil for emitting electromagnetic signals. An electromagnetic whiteboard defines an erasing area for erasing the writing inputted by electromagnetic induction by defining the position of the coil to be the center of the erasing area and defining the diameter or radius of the ink eraser to be the diameter or radius of the erasing area after the electromagnetic whiteboard induces the electromagnetic signals emitted by the coil. The coil is deposed on the place corresponding to the center of the ink eraser.