| 摘要 |
A method for increasing a signal to noise ratio of a capacitive touch device and a capacitive touch device and a touch panel using the same are provided. The capacitive touch device includes a first sensing electrode, a second sensing electrode, a touch detector, a resonant inductor and a detection signal output circuit.;An output terminal of the detection signal output circuit outputs a detection signal, such that the resonant inductor and an equivalent capacitor of the first sensing electrode are resonant, and the first sensing electrode receives a resonant sinusoidal wave. When an electric field signal detected by the detecting terminal of the touch detector is smaller than a preset value, it is determined that the capacitive touch device is touched. |
| 主权项 |
1. A touch panel, comprising:
M first-axis sensing electrodes, wherein M is a natural number; N second-axis sensing electrodes, wherein N is a natural number; a touch detector comprising N detecting terminals, wherein an Ith detecting terminal of the touch detector is coupled to an Ith second-axis sensing electrode, wherein I is a natural number, and 0<I<=N; M resonant inductors, wherein each of the resonant inductors comprises a first terminal and a second terminal, wherein a first terminal of the Jth resonant inductor is coupled to the Ith first-axis sensing electrode, wherein J is a natural number, and 0<J<=M; and a detection signal output circuit comprising M output terminals, wherein a Kth output terminal of the detection signal output circuit is coupled to a second terminal of the Kth resonant inductor, wherein K is a natural number, and 0<K<=M; wherein a detecting period is divided into M scanning periods, wherein in the Pth scanning period, the Pth output terminal of the detection signal output circuit outputs a detection signal, so that he resonant inductor and an equivalent capacitor of the Pth first-axis sensing electrode are resonant, and the Pth first-axis sensing electrode receives a resonant sinusoidal wave, wherein in the Pth scanning period, when an electric field signal detected by the Qth detecting terminal of the touch detector is smaller than a preset value, it is determined that a (P, Q) coordinate of the touch panel is touched, wherein P and Q are natural numbers, and 0<P<=M, 0<Q<=N. |
