Projective capacitive stylus and controlling method thereof

Abstract

Configurations of a stylus and controlling methods thereof are disclosed. The proposed stylus causes a touch panel to generate a signal by an electrical field generated by a magnetic field via one of a conductor and an electric plate, wherein the stylus includes a set of windings and a magnet, which can move towards each other and generate a current on the set of windings through interaction. The current flows through the conductor/electric plate on a tip of the stylus to generate one of an electric flux line and a magnetic flux line such that the touch panel can sense the movement of the stylus.

What is claimed is: 
     
         1 . A projective capacitive stylus, comprising:
 a magnet having a first terminal and a second terminal;   a winding allowing an entrance and an exit of the first terminal of the magnet, wherein when an external force causes the magnet and the winding to generate a first relative motion, a first current is generated on the winding;   a spring connected to the second terminal of the magnet, wherein when the external force is removed, the spring causes the magnet and the winding to generate a second relative motion and causes a second current to be generated on the winding; and   one of a conductor and an electric plate, configured on a tip of the stylus and electrically connected to the winding, wherein the projective capacitive stylus is free from a tuning circuit and a built-in power supply, and when the first current and the second current are respectively generated, a first signal and a second signal are correspondingly generated on an external touch panel via the one of the conductor and the electric plate.   
     
     
         2 . A projective capacitive stylus according to  claim 1 , further comprising a button, and a connecting rod connected to the button and the magnet, wherein when the button is pressed, the external force generated thereby causes the connecting rod to move inward to drive the first terminal of the magnet to depart from the winding so as to generate an induced reversal potential, which causes the second current to be generated on the winding; and when the button is released from being pushed down, the external force is removed, causing the spring to push the magnet back to an original position to generate an induced potential at this moment, which in turn causes the first current to be generated on the winding. 
     
     
         3 . A projective capacitive stylus according to  claim 1 , further comprising a shell containing the magnet, the winding, the spring and the one of the conductor and the electric plate, wherein the shell has a tip end and a top end, the tip end has an opening allowing the one of the conductor and the electric plate to be exposed to contact the touch panel, and the spring is fixed to the top end. 
     
     
         4 . A projective capacitive stylus according to  claim 1 , wherein when the one of the conductor and the electric plate is depressed, the external force generated thereby causes the one of the conductor and the electric plate to move inward to drive the winding to approach the first terminal of the magnet to generate an induced potential, which causes the first current to be generated on the winding; and when the one of the conductor and the electric plate is released from being pushed down, the spring pushes the winding back to an original position to generate an induced reversal potential at this moment, which causes the second current to be generated on the winding, the first current is a forward current, and the second current is a reverse current. 
     
     
         5 . A projective capacitive stylus, comprising:
 a magnet; and   a winding, wherein the projective capacitive stylus is free from a tuning circuit and a built-in power supply, and the magnet induces the winding to cause the winding to generate a current to further influence a strength of a touch signal on an external touch panel.   
     
     
         6 . A projective capacitive stylus according to  claim 5 , wherein the current includes a first current and a second current, the touch signal includes a first signal and a second signal, when the magnet and the winding generate a first relative motion, the first current is generated on the winding, when the magnet and the winding generate a second relative motion, the second current is generated on the winding, and the first current and the second current respectively cause the external touch panel to correspondingly generate the first signal and the second signal. 
     
     
         7 . A projective capacitive stylus according to  claim 5 , wherein the current includes a forward current and a reverse current, the touch signal includes a first signal and a second signal, a relative motion direction of the magnet and the winding is changed by one of a push-button manner and a stylus-click manner to the external touch panel to correspondingly generate a respective one of the first signal and the second signal, which are used to determine various motions of the stylus. 
     
     
         8 . A projective capacitive stylus according to  claim 5 , further comprising a body, wherein the magnet and the winding are configured in the body, and the winding is in a relative motion with the magnet such that when the magnet induces the winding, the winding generates the current used to form the touch signal. 
     
     
         9 . A projective capacitive stylus according to  claim 5 , wherein the current includes a forward current and a reverse current, the touch signal includes a forward signal and a reverse signal, the magnet has a positive pole and a negative pole, when the winding induces the positive pole and the negative pole to generate the forward current and the reverse current respectively, the forward signal and the reverse signal are respectively generated on the external touch panel in response to the forward current and the reverse current. 
     
     
         10 . A projective capacitive stylus according to  claim 5 , further comprising one of a conductor and an electric plate, configured on a tip of the stylus, wherein the winding is electrically connected to the one of the conductor and the electric plate, the one of the conductor and the electric plate amplifies a conductor effect via the winding to generate the touch signal being a relatively strong one. 
     
     
         11 . A projective capacitive stylus apparatus, comprising:
 a plurality of projective capacitive styluses as claimed in  claim 1 ,   wherein when the plurality of projective capacitive styluses touch an external touch panel having an oscillator circuit, a plurality of signals are correspondingly generated via the oscillator circuit to support a multi-touch function.   
     
     
         12 . A controlling method for a projective capacitive stylus, comprising steps of:
 providing a magnet and a winding;   causing the magnet to induce the winding to generate a current; and   causing the current to influence a strength of a touch signal on an external touch panel, wherein the projective capacitive stylus is free from a tuning circuit and a built-in power supply.   
     
     
         13 . A controlling method for a projective capacitive stylus according to  claim 12 , wherein the current includes a forward current and a reverse current, and the touch signal includes a forward signal and a reverse signal, further comprising steps of:
 changing a motion direction of one of the magnet and the winding via one of a push-button manner and a stylus-click manner;   in response to the changed motion direction, generating the forward current and the reverse current;   in response to the forward current and the reverse current, correspondingly generating the forward signal and the reverse signal on the external touch panel; and   using the forward signal and the reverse signal to determine various motions of the stylus.   
     
     
         14 . A controlling method for a projective capacitive stylus according to  claim 12 , further comprising steps of:
 providing one of a conductor and an electric plate, configured on a tip of the stylus, wherein the winding is electrically connected to the one of the conductor and the electric plate; and   causing the one of the conductor and the electric plate to amplify a conductor effect via the winding to generate the touch signal being a relatively strong one.   
     
     
         15 . A controlling method for a projective capacitive stylus according to  claim 12 , wherein the magnet has a positive pole and a negative pole, the current includes a forward current and a reverse current, and the touch signal includes a forward signal and a reverse signal, further comprising steps of:
 causing the positive pole and the negative pole to induce the winding to respectively generate the forward current and the reverse current; and   in response to the forward current and the reverse current, respectively generating the forward signal and the reverse signal on the external touch panel.   
     
     
         16 . A controlling method for a projective capacitive stylus according to  claim 12 , wherein the stylus comprises a body, and the magnet and the winding are configured within the body, further comprising steps of:
 causing the winding and the magnet to have a relative motion such that when the magnet induces the winding, the current is generated on the winding; and   forming the touch signal on the external touch panel via the current.   
     
     
         17 . A controlling method for a projective capacitive stylus apparatus, comprising steps of:
 providing a plurality of projective capacitive styluses as claimed in  claim 1 ;   causing the plurality of projective capacitive styluses to touch an external projective capacitive touch panel having an oscillator circuit; and   in response to touches of the plurality of projective capacitive styluses, correspondingly generating a plurality of signals via the oscillator circuit to support a multi-touch function.