Patent ID: 9542056
Date: 2017-01-10
CPC Classifications: G06F

Claim:
1. A resistive force sensing circuit, comprising: a plurality of sensor circuit inputs; a plurality of sensor circuit outputs; and a plurality of resistor units, each of the resistor units comprising a force-sensing resistor, a first side resistor, and a second side resistor, wherein first terminals of the force-sensing resistor, the first side resistor and the second side resistor are electrically connected to each other at one node, a second terminal of the force-sensing resistor is electrically connected to one of the sensor circuit inputs, second terminals of the first side resistor and the second side resistor are electrically connected to two adjacent sensor circuit outputs of the sensor circuit outputs, respectively, and the first side resistor and the second side resistor are a pair of resistors with substantially equal resistance, and the force-sensing resistor of each of the plurality of resistor units are independent of one another; wherein results of a one point force input test and a multi-point force input test are the same while a same force level is applied.