Door handle
A door handle includes door handle case, a first detection electrode and a second detection electrode disposed in the door handle case, and a controller connected to the first detection electrode and the second detection electrode. The controller separately measures a first capacitance between the first detection electrode and an operation body and a second capacitance between the second detection electrode and the operation body, and the controller determines whether a locking operation is performed by the operation body based on one or both of the first capacitance and the second capacitance.
1. A door handle comprising
a door handle case;
a first detection electrode and a second detection electrode disposed in the door handle case; and
a controller connected to the first detection electrode and the second detection electrode, wherein
the controller separately measures a first capacitance between the first detection electrode and an operation body and a second capacitance between the second detection electrode and the operation body, and
the controller determines whether an operation is performed by the operation body based on one or both of the first capacitance and the second capacitance, wherein the controller measures a total capacitance between the first detection electrode and the second detection electrode versus the operation body, and
when the total capacitance is greater than or equal to a predetermined reference value, the controller separately measures the first capacitance between the first detection electrode and the operation body and the second capacitance between the second detection electrode and the operation body.
2. The door handle according to claim 1 , wherein the controller does not measure the second capacitance at the second detection electrode when measuring the first capacitance at the first detection electrode, and the controller does not measure the first capacitance at the first detection electrode when measuring the second capacitance at the second detection electrode.
3. The door handle according to claim 1 , wherein the controller determines that the operation is performed by the operation body when one of the first capacitance and the second capacitance is greater than or equal to a predetermined reference value.
4. The door handle according to claim 3 , wherein the controller determines that the operation is not performed by the operation body when both the first capacitance and the second capacitance are greater than or equal to the predetermined reference value.
5. The door handle according to claim 4 , wherein the controller determines that the operation is not performed by the operation body when both the first capacitance and the second capacitance are less than the predetermined reference value.
6. The door handle according to claim 1 , wherein the door handle is attached to a door of a vehicle,
the first detection electrode and the second detection electrode are lock detection electrodes, and
the operation performed by the operation body is an operation for locking the door.
7. The door handle according to claim 6 , further comprising a substrate, an upper-side wiring electrode, and a lower-side wiring electrode that is disposed separately from the upper-side wiring electrode, wherein
the first detection electrode is disposed on an upper part of the door handle, and the second detection electrode is disposed on a lower part of the door handle, and
the first detection electrode is connected to the substrate via the upper-side wiring electrode, and the second detection electrode is connected to the substrate via the lower-side wiring electrode.
8. The door handle according to claim 6 , wherein the controller determines that the operation is performed by the operation body when one of the first capacitance or the second capacitance is greater than or equal to a predetermined reference value, and the controller determines that the operation is not performed by the operation body when both the first capacitance and the second capacitance are greater than or equal to the predetermined reference value, or when both the first capacitance and the second capacitance are less than the predetermined reference value.
9. The door handle according to claim 1 , wherein the controller determines a condition whether the total capacitance is greater than or equal to a predetermined reference value is met, and separately measure the first capacitance and the second capacitance only upon determining that the condition is met.