Touch sensor with sliding structure
A touch sensor with a sliding structure is disclosed. The touch sensor includes a first touch detecting plate, a second touch detecting plate, and a capacitance-to-digital converter. The first touch detecting plate includes a first tilt portion, and the second touch detecting plate includes a second tilt portion, wherein a bevel edge of the second tilt portion is parallel to a bevel edge of the first tilt portion. The first touch detecting plate and the second touch detecting plate form a parallelogram slide detecting area. The first touch detecting plate transmits a first detected capacitance, and the second touch detecting plate transmits a second detected capacitance. The capacitance-to-digital converter generates a sliding state detected value according to the first detected capacitance and the second detected capacitance.
1. A touch sensor with a sliding structure, comprising:
a first touch detecting plate, comprising a first tilt portion;
a second touch detecting plate, comprising a second tilt portion, wherein a bevel edge of the second tilt portion is parallel to a bevel edge of the first tilt portion, and the first touch detecting plate and the second touch detecting plate form a parallelogram slide detecting area; and
a capacitance-to-digital converter, directly connected to the first touch detecting plate at one side of the slide detecting area through a first conductive line for transmitting a first detected capacitance, and directly connected to the second touch detecting plate at another side of the slide detecting area through a second conductive line for transmitting a second detected capacitance;
wherein the capacitance-to-digital converter generates a sliding state detected value according to the first detected capacitance and the second detected capacitance.
2. The touch sensor according to claim 1 further comprising:
a third touch detecting plate, having a parallelogram shape, disposed between the first touch detecting plate and the second touch detecting plate, wherein a first bevel edge of the third touch detecting plate is parallel to the bevel edge of the first tilt portion of the first touch detecting plate, a second bevel edge of the third touch detecting plate is parallel to the bevel edge of the second tilt portion of the second touch detecting plate, and the first bevel edge of the third touch detecting plate and the second bevel edge of the third touch detecting plate are parallel to each other.
3. The touch sensor according to claim 1 , wherein the first touch detecting plate further comprises a first flat panel portion connected to a flat edge of the first tilt portion.
4. The touch sensor according to claim 1 , wherein the second touch detecting plate further comprises a second flat panel portion connected to a flat edge of the second tilt portion.
5. The touch sensor according to claim 1 , wherein the capacitance-to-digital converter calculates a difference between the first detected capacitance and the second detected capacitance to obtain the sliding state detected value.
6. The touch sensor according to claim 1 , wherein the sliding state detected value is a digital signal.
7. The touch sensor according to claim 1 further comprising:
a controller, coupled to the capacitance-to-digital converter, for receiving the sliding state detected value and determining a touched state of the touch sensor according to the sliding state detected value.
8. A touch sensor with a sliding structure, comprising:
a first touch detecting plate, comprising a first tilt portion;
a second touch detecting plate, comprising a second tilt portion, wherein a bevel edge of the second tilt portion is parallel to a bevel edge of the first tilt portion, and the first touch detecting plate and the second touch detecting plate form a parallelogram slide detecting area; and
a capacitance-to-digital converter, having a first input terminal and a second input terminal, wherein the first touch detecting plate at one side of the slide detecting area is coupled to the first input terminal for transmitting a first detected capacitance, and the second touch detecting plate at another side of the slide detecting area is coupled to the first input terminal or the second input terminal for transmitting a second detected capacitance;
wherein the capacitance-to-digital converter generates a sliding state detected value according to the first detected capacitance and the second detected capacitance.
9. The touch sensor according to claim 8 , wherein the first touch detecting plate further comprises a first flat panel portion connected to a flat edge of the first tilt portion.
10. The touch sensor according to claim 8 , wherein the second touch detecting plate further comprises a second flat panel portion connected to a flat edge of the second tilt portion.
11. The touch sensor according to claim 8 , wherein the first input terminal is a positive input terminal of the capacitance-to-digital converter, and the second input terminal is a negative input terminal of the capacitance-to-digital converter.
12. The touch sensor according to claim 11 , wherein when the second touch detecting plate at the other side of the slide detecting area is coupled to the first input terminal, the capacitance-to-digital converter calculates a sum of the first detected capacitance and the second detected capacitance to obtain the sliding state detected value, and when the second touch detecting plate at the other end of the slide detecting area is coupled to the second input terminal, the capacitance-to-digital converter calculates a difference between the first detected capacitance and the second detected capacitance to obtain the sliding state detected value.
13. The touch sensor according to claim 8 further comprising:
a controller, coupled to the capacitance-to-digital converter, for receiving the sliding state detected value and determining a touched state of the touch sensor according to the sliding state detected value.