Patent ID: 11903296
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. A display device, comprising:
a display panel including pixels that emit light on a frame basis;
an input sensing unit including electrodes;
an input sensing circuit configured to provide driving signals to the electrodes and configured to receive sensing signals depending on the driving signals from the electrodes to detect a touch input,
wherein:
the input sensing circuit comprises analog front-ends to receive the sensing signals depending on the driving signals from the electrodes;
each of the analog front-ends comprises:
a multiplexer configured to select two sensing signals among sensing signals provided from three adjacent electrodes among the electrodes;
a charge amplifier configured to output complementary first and second differential signals by differentially amplifying the two sensing signals selected from the sensing signals;
a band pass filter configured to output a first filtered signal and a second filtered signal by filtering the first differential signal and the second differential signal, respectively;
a mixer configured to output a first demodulated signal and a second demodulated signal by changing frequencies of the first filtered signal and the second filtered signal, respectively;
a low pass filter configured to output a first output signal and a second output signal by filtering noise from each of the first demodulated signal and the second demodulated signal; and
an analog-to-digital converter configured to output a differential output value corresponding to a difference between the first output signal and the second output signal;

each of the driving signals has a sine wave shape; and
the driving signals are asynchronous with a horizontal synchronization signal.