Electrical touch pad regulating sensitivity based on ambient humidity and method thereof
First Claim
1. An electrical touch pad comprising:
- a touch sensor for detecting operational inputs, and generating analog signals according to the operational inputs;
a touch detection unit for receiving the analog signals, amplifying the analog signals by a controllable gain to generate amplified analog signals, converting the amplified analog signals to generate digital signals, and sending the digital signals to a processor to determine a touched location;
a humidity detection unit for detecting ambient humidity and determining a humidity level; and
a humidity compensation unit for receiving the humidity level, generating a gain regulation signal to control the touch detection unit to regulate the controllable gain according to the humidity level.
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Abstract
An electrical touch pad includes a touch sensor for detecting operational inputs, and generating analog signals according to the operational inputs; a touch detection unit for receiving analog signals, amplifying the analog signals by a controllable gain to generate amplified analog signals, converting the amplified analog signals to generate digital signals, and sending the digital signals to a processor to determine a touched location; a humidity detection unit for detecting ambient humidity and determining a humidity level; and a humidity compensation unit for receiving the humidity level, generating a gain regulation signal to control the touch detection unit to regulate the controllable gain according to the humidity level. Thereby, in erratic behavior of the electrical touch pad can be prevented and stability of the touch pad is enhanced. A related method for regulating sensitivity of the electrical touch pad is also provided.
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Citations
13 Claims
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1. An electrical touch pad comprising:
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a touch sensor for detecting operational inputs, and generating analog signals according to the operational inputs; a touch detection unit for receiving the analog signals, amplifying the analog signals by a controllable gain to generate amplified analog signals, converting the amplified analog signals to generate digital signals, and sending the digital signals to a processor to determine a touched location; a humidity detection unit for detecting ambient humidity and determining a humidity level; and a humidity compensation unit for receiving the humidity level, generating a gain regulation signal to control the touch detection unit to regulate the controllable gain according to the humidity level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for regulating sensitivity of an electrical touch pad, comprising:
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receiving analog signals generated by the electrical touch pad; amplifying the analog signals by a controllable gain to generate amplified analog signals; detecting ambient humidity; determining a humidity level; generating a gain regulation signal for regulating the controllable gain according to the humidity level; regulating the controllable gain according to the gain regulation signal; converting the amplified analog signals to generate digital signals; and determining a touched location according to the digital signals. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification