Charged body sensing system
OwnerLi-Hsin HUANGinventor
Life of this patent
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Abstract
A charged body sensing electrode is provided which includes a signal generator, a filter and a detector. The signal generator generates an excitation signal, and the filter is coupled to the signal generator and receives the excitation signal from the signal generator. The filter includes at least one charged body sensing unit. The detector is coupled to the filter and detects an output signal corresponding to the filter. Accordingly, when the charged body neared or touched the charged body sensing electrode, the output signal of the filter will be changed. The trajectory, the velocity or the location of the charged body, or the impedance variation of the charged body sensing unit can be obtained by the change of the output signal of the filter which is detected by the detector.
Claims13
A charged body sensing system, comprising:
- a signal generator, which generates at least one excitation signal, said excitation signal includes at least a period of periodic signal;
- a filter, which is coupled to said signal generator, said filter is provided for receiving said excitation signal from said signal generator, said filter includes at least a resonant circuit, said resonant circuit includes at least a charged body sensing unit, and said charged body sensing unit includes at least a charged body sensing electrode and at least an impedance element;
- and
- a detector, which is coupled to said filter, said detector corresponding to an output signal of said filter, when said charged body nears or touches said charged body sensing electrode, said output signal corresponding to said filter is to be changed, said detector detects the variation of said output signal of said filter to obtain the trajectory, the velocity or the location of said charged body, or the impedance variation within said charged body sensing unit.
Dependencies are inferred from the claim text.