Coordinate measuring apparatus and coordinate measuring system having the same

A coordinate measuring apparatus which detects a contact position of a hand based on capacitance and detect a contact position of a coordinate indicating apparatus configured to generate an electrical signal for measuring the contact position, the coordinate measuring apparatus comprising:

• a channel electrode circuit including a plurality of electrodes;
• a driver circuit configured to generate a driving signal and provide the driving signal to the channel electrode circuit;
• a receiver configured to simultaneously a receive first receiving signal for detecting capacitance change and a second receiving signal corresponding to the electrical signal generated in the coordinate indicating apparatus from electrodes of the channel electrode circuit;
• and
• a processor configured to determine a position of the hand based on the first receiving signal, or
• determine a position of the coordinate indicating apparatus based on the second receiving signal received from the receiver,
• wherein the driver circuit is further configured to generate:
• a first driving signal for detecting the capacitance change and a second driving signal which is an excitation signal for generating the electrical signal of the coordinate indicating apparatus, and
• apply the first driving signal and the second driving signal to different electrodes.

A coordinate measuring system comprising:

• a coordinate measuring apparatus including a plurality of electrodes and a receiver;
• and
• a coordinate indicating apparatus configured to transmit a response signal to at least one of the plurality of electrodes in the coordinate measuring apparatus,
• wherein the coordinate measuring apparatus is configured to generate a driving signal,
• wherein the receiver is configured to:
• receive a first receiving signal for detecting capacitance change from a portion of the plurality of electrodes, and
• simultaneously receive a second receiving signal corresponding to a signal generated by coordinate indicating apparatus from another portion of the plurality of electrodes, and
• wherein the coordinate indicating apparatus is further configured to generate the response signal for a preset time in response to the driving signal being detected through capacitive coupling.