Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens

Figure 11

Experimental results for a 23-inch touch screen panel. (a) SNR of four different driving and sensing schemes. (b) Scan rate of the proposed method CDDS compared with conventional method SDSS. This experiment was conducted with 1.25 MHz TX pulse signal with 10 V swing. Note: SNR is calculated using the equations in [19].

(a)

(b)