Noise spectrum estimator and touch screen device including the same

摘要

A noise spectrum estimator for a touch panel includes an adaptive impulse response generation unit configured to generate impulse response information by performing an adaptive training operation on noise data, the noise data being generated by sampling a plurality of noise signals received from the touch panel, and an estimation unit configured to generate noise frequency spectrum estimation information associated with the noise data by performing a fast Fourier transform (FFT) on the impulse response information.

主权项

1. A noise spectrum estimator for a touch panel, comprising:
an adaptive impulse response generator to generate impulse response information by performing an adaptive training operation on noise data, the noise data being generated by sampling a plurality of noise signals received from the touch panel; and an estimator to generate noise frequency spectrum estimation information associated with the noise data by performing a fast Fourier transform (FFT) on the impulse response information, wherein first peak frequencies corresponding to first noise peak points are substantially equal to second peak frequencies corresponding to second noise peak points, the first noise peak points being detected based on the noise frequency spectrum estimation information, the second noise peak points being obtained by directly performing the FFT on the noise data.