摘要:
A force sensing resistor (FSR) includes a substrate having separated electrically conductive traces and another substrate having a resistive layer in which the substrates are subjected to a biasing force such that the substrates contact one another with the resistive layer electrically connecting the traces with a resistance inversely dependent on the biasing force. Upon an external force applied towards a substrate, the substrates contact one another with a total force which is the sum of the forces with the resistive layer electrically connecting the traces with a resistance inversely dependent on the total force. An FSR output which is a function of the resistance is measured. Whether a change in magnitude of the FSR output during a time interval is greater than a threshold is determined. A touch applied on the FSR is detected during the time interval if the change is greater than the threshold.
摘要:
The present invention determines angular position using a potentiometric touch sensor. The sensor has an annular pattern of resistive material on a portion of a bottom substrate top surface. Conductive drive lines and fixed potential conductive traces radially traverse the bottom substrate top surface and are electrically coupled to the resistive material. Conductive sense traces radially traverse the bottom substrate top surface. A conductive layer on a bottom surface of a top substrate is positioned above the bottom substrate top surface. A pressure applied to the top substrate and/or the bottom substrate electrically couples a portion of a conductive sense trace to a portion of the annular pattern and/or a fixed potential conductive trace. The angular position of the applied pressure is determined by measuring at least one electrical parameter between a conductive drive line and a conductive sense line having the conductive sense traces.
摘要:
A touchpad includes a first substrate and a second substrate, at least one of which is flexible. A resistor on the first substrate has a narrow shape dividing the first substrate into two regions. A set of conductors in electrical contact with the resistor extend from the resistor into the two regions. A second resistor and at least one second substrate conductor in electrical contact with the second resistor are on the second substrate. This construction allows the touchpad to have an outer shape is not restricted by the need for rectangular coordinates.
摘要:
A force sensing resistor includes two substrates. Conductive traces including first, common, and calibration fingers are on the first substrate and define a contact area. A spacer surrounds the contact area and attaches the substrates together such that a cavity separates the substrates in the contact area. A first resistive layer is on the second substrate and arranged within the cavity. In response to a force moving one substrate, the first resistive layer electrically connects the first and common fingers with a resistance dependent upon resistivity of the first resistive layer and the applied force to produce an electrical signal indicative of the applied force. A second resistive layer is arranged within the cavity and electrically connects the calibration and common fingers with a resistance dependent upon resistivity of the second resistive layer to produce an electrical signal indicative of the resistivity of the second resistive layer.
摘要:
A sensor system includes a touch screen and a force sensor. The touch screen has a first and second surface and detects a first surface touch and converts it to data indicative of an X, Y coordinate position upon the touch screen first surface. The force sensor contacts the touch screen second surface and substantially extends around the perimeter of the touch screen second surface. The force sensor measures the force exerted by the first surface touch in the form of force data.
摘要:
A force sensing resistor (FSR) includes a substrate having separated electrically conductive traces and another substrate having a resistive layer in which the substrates are subjected to a biasing force such that the substrates contact one another with the resistive layer electrically connecting the traces with a resistance inversely dependent on the biasing force. Upon an external force applied towards a substrate, the substrates contact one another with a total force which is the sum of the forces with the resistive layer electrically connecting the traces with a resistance inversely dependent on the total force. An FSR output which is a function of the resistance is measured. Whether a change in magnitude of the FSR output during a time interval is greater than a threshold is determined. A touch applied on the FSR is detected during the time interval if the change is greater than the threshold.
摘要:
The present invention determines angular position using a potentiometric touch sensor. The sensor has an annular pattern of resistive material on a bottom substrate top surface. Conductive drive lines radially traverse the resistive material so as to make electrical connection with the resistive material. A top substrate is spaced above the top surface of the bottom substrate. A conductive sense layer on a bottom surface of the top substrate is positioned above the resistive material. Pressure applied to either the top substrate or the bottom substrate, such as by the touch of a user, causes a portion of the conductive sense layer to contact a corresponding portion of the annular pattern of resistive material. The angular position of the applied pressure can be determined by measuring at least one electrical parameter between at least one of the conductive drive lines and the conductive sense layer.
摘要:
A touch input device includes two or more interleaved scroll sensors. A common area is interposed between two of the scroll sensors. A sense line snakes through the common area. Scrolling pressure applied to a sense layer causes the sense layer to contact and electrically connect the sense line to the scroll sensors thereby permitting the scrolling pressure position to be determined by measuring a voltage on the sense line. The scroll sensors are potentiometric and may be linear strip scroll sensors or rotary ring scroll sensors. The interleaved scroll sensors with the common area allow smooth scrolling action from one major leg to another major leg.
摘要:
A touchpad includes a first substrate and a second substrate, at least one of which is flexible. A resistor on the first substrate has a narrow shape dividing the first substrate into two regions. A set of conductors in electrical contact with the resistor extend from the resistor into the two regions. A second resistor and at least one second substrate conductor in electrical contact with the second resistor are on the second substrate. This construction allows the touchpad to have an outer shape is not restricted by the need for rectangular coordinates.
摘要:
The cost and complexity of an electronic pressure sensitive transducer are decreased by constructing such a transducer directly on a printed circuit board containing support electronics. Conductive traces are formed on the printed circuit board to define a contact area. A flexible substrate having an inner surface is positioned over the contact area. An adhesive spacer, substantially surrounding the contact area, attaches the flexible substrate to the printed circuit board. At least one resistive layer is deposited on the flexible substrate inner surface. In use, the resistive layer contacts at least two conductive traces in response to pressure applied to the flexible substrate to produce an electrical signal indicative of applied pressure.