Patent ID: 9007313
Filing Date: 2015-04-14
Classification: G06F

Abstract:
1. A touch sensing circuit, comprising: an AC source; a voltage division circuit comprising a first branch and a second branch on a touch sensing glass, wherein the first branch and the second branch are adjacent to each other and configured to receive AC signal outputted from the AC source, and wherein the first branch comprises a first capacitor and a first voltage division resistor connected to the first capacitor, and the second branch comprises a second capacitor and a second voltage division resistor connected to the second capacitor; a processing circuit connected to the voltage division circuit, wherein the processing circuit determines position of a touch point based on voltages of the first branch and the second branch; and a first equalizing resistor, a second equalizing resistor, a third equalizing resistor, a fourth equalizing resistor, a fifth equalizing resistor, and a sixth equalizing resistor, a first equalizing capacitor, a second equalizing capacitor, a third equalizing capacitor and a fourth equalizing capacitor, wherein one terminal of the first equalizing resistor is connected to one terminal of the third equalizing resistor, other terminal of the first equalizing resistor is connected to one terminal of the AC source, other terminal of the AC source is connected to one terminal of the second equalizing resistor, other terminal of the second equalizing resistor is grounded, other terminal of the third equalizing resistor is connected to one terminal of the first capacitor, other terminal of the first capacitor is connected to one terminal of the fourth equalizing resistor, other terminal of the fourth equalizing is connected to one terminal of the first voltage division resistor, other terminal of the first voltage division resistor is grounded, one terminal of the first equalizing capacitor is connected to the common terminal of the third equalizing resistor and the first capacitor, other terminal of the first equalizing capacitor is grounded, one terminal of the second equalizing capacitor is connected to the common terminal of the fourth equalizing resistor and the first capacitor, other terminal of the second equalizing capacitor is grounded, one terminal of the fifth equalizing resistor is connected to the common terminal of the first equalizing resistor and the third equalizing resistor, other terminal is connected to one terminal of the second capacitor, other terminal of the second capacitor is connected to one terminal of the sixth equalizing resistor, other terminal of the sixth equalizing resistor is connected to one terminal of the second voltage division resistor, other terminal of the second voltage division resistor is grounded, one terminal of the third equalizing capacitor is connected to the common terminal of the fifth equalizing resistor and the second capacitor, other terminal of the third equalizing capacitor is grounded, one terminal of the fourth equalizing capacitor is connected to the common terminal of the sixth equalizing resistor and the second capacitor, and other terminal of the fourth equalizing capacitor is grounded.