Electrostatic capacity switching unit
The present invention provides a capacitive switch device comprising: a touch sensing unit ( 100 ) including a sensing electrode ( 110 ) and a transmission electrode ( 120 ), which are disposed on a substrate ( 2 ); and a touch control module ( 200 ) disposed on a substrate ( 2 ), and configured to confirm a manipulator's contact manipulation state based on a sensing signal from the touch sensing unit ( 100 ) and output a touch output signal, wherein the transmission electrode ( 120 ) outputs a transmission signal in response to a transmission control signal from the touch control module ( 200 ), and the sensing electrode ( 110 ) detects a signal in response to a sensing control signal from the touch control module ( 200 ) for application to the touch control module ( 200 ), and wherein the touch control module ( 200 ) activates the sensing electrode ( 110 ) and the transmission electrode ( 120 ) according to a preset mode, and a method for controlling the same.
1. A capacitive switch device comprising:
a substrate;
a touch sensing unit including a sensing electrode and a transmission electrode, which are disposed on the substrate; and
a touch control module having circuits disposed on the substrate, and configured to confirm that the touch sensing unit is in a state of being touched by a human body based on a sensing signal from the touch sensing unit and output a touch output signal,
wherein the transmission electrode outputs a transmission signal in response to a transmission control signal from the touch control module, and the sensing electrode is activated in response to a sensing control signal from the touch control module, and
wherein the touch control module is configured to selectably activate, in response to the touch output signal, the sensing electrode and the transmission electrode according to any of a plurality of measurement modes including:
a self-capacitance measurement mode in which the sensing electrode is activated, the transmission electrode is deactivated, and the touch sensing unit measures a self-capacitance value;
a mutual-capacitance measurement mode in which the sensing electrode is deactivated, the transmission electrode is activated, and the touch sensing unit measures a mutual-capacitance value; and
a combined-capacitance measurement mode in which the sensing electrode and the transmission electrode are activated, and the touch sensing unit measures a combined-capacitance value.
2. The capacitive switch device according to claim 1 , wherein the sensing electrode and the transmission electrode are respectively disposed on both surfaces of the substrate.
3. The capacitive switch device according to claim 1 , wherein the sensing electrode and the transmission electrode are disposed on a same surface of the substrate.
4. The capacitive switch device according to claim 3 , wherein the transmission electrode is disposed at an outer periphery of the sensing electrode.
5. The capacitive switch device according to claim 1 , wherein the touch control module comprises:
a touch sensor control unit configured to apply the transmission control signal to the transmission electrode to activate the transmission electrode and the sensing control signal to the sensing electrode to activate the sensing electrode;
a signal processing unit configured to process a detection signal detected by the sensing electrode; and
a signal output unit configured to output the detection signal processed by the signal processing unit to an outside.
6. The capacitive switch device according to claim 5 , wherein the touch sensor control unit executes the self-capacitance measurement mode of activating the sensing electrode and deactivating the transmission electrode.
7. The capacitive switch device according to claim 5 , wherein the touch sensor control unit executes the mutual-capacitance measurement mode of deactivating the sensing electrode and activating the transmission electrode.
8. The capacitive switch device according to claim 5 , wherein the touch sensor control unit executes the combined-capacitance measurement mode of activating the sensing electrode and the transmission electrode.
9. The capacitive switch device of claim 5 , wherein the touch sensor control unit is further configured to establish sole activation of the sensing electrode, sole activation of the transmission electrode, and activation of both the sensing electrode and the transmission electrode.
10. The capacitive switch device of claim 5 , wherein the signal processing unit is configured to analyze a signal pattern using data calculated from the detection signal and perform an operation of determining a user's direct contact or operation intention.