Patent ID: 11914828
Assignee: SUNG HO LEE
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. A capacitor detection device, comprising:
a Capacitor Detect Area (CDA) on a display part consisting of a conductor and an independent area;
a voltage generator generating a driving voltage;
a CDA signal line on the display part connected to the CDA, and on a same layer as the CDA;
a plurality of CDA columns composed of the plurality of CDAs and formed on the same layer as the CDA;
a detection CDA to detect object capacitor;
a sensing signal line connected to the detection CDA in the CDA column;
a plurality of driving signal lines adjacent to the sensing signal line in the CDA column; and
a semiconductor IC comprising an operational amplifier,
wherein the sensing signal line and the plurality of driving signal lines extend in a same direction,
wherein the voltage generator generates a first driving voltage applied to one or some of driving signal lines and a second phase of a driving voltage applied to other driving signal lines, to detect a capacitance of the detection CDA, wherein a phase of the first driving voltage and a phase of the second driving voltage are different,
wherein the sensing signal line of the CDA for detecting an added capacitance is connected to one input terminal of the operational amplifier, and a DAC value that duplicates a first sensing signal detected by the operational amplifier when there is no object connected to the other input terminal of the operational amplifier.