Capacitive controller
First Claim
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1. A capacitive controller, executing:
- simultaneously providing a same electrical signal to a first wire and each of at least one second wire, wherein all of at least one reference plate are electrically coupled to the first wire, and each of at least one detecting plate is electrically coupled to one of the at least one second wire, wherein the dimension of each detecting plate is equal to or approximately equals the total dimension of all of the reference plates; and
detecting a touch or approach by an external object with respect to each detecting plate based on a corresponding signal difference between each second wire and the first wire, respectively.
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Abstract
The present invention provides a capacitive controller for detecting at least one detecting plate and at least one reference plate surrounding each detecting plate. All of the reference plates are electrically coupled to the same first wire, and each reference plate is electrically coupled to a second wire. When an electrical signal is provided to the first wire and each second wire, one or more detecting plates touched or approached can be detected simultaneously based on the signal difference between each second wire and the first wire.
15 Citations
15 Claims
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1. A capacitive controller, executing:
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simultaneously providing a same electrical signal to a first wire and each of at least one second wire, wherein all of at least one reference plate are electrically coupled to the first wire, and each of at least one detecting plate is electrically coupled to one of the at least one second wire, wherein the dimension of each detecting plate is equal to or approximately equals the total dimension of all of the reference plates; and detecting a touch or approach by an external object with respect to each detecting plate based on a corresponding signal difference between each second wire and the first wire, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A capacitive controller using signal differences for detection, executing:
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simultaneously providing a same electrical signal to a first wire and each of at least one second wire continuously at a plurality of periods to obtain a reference value of the first wire and a detection value of each second wire, wherein all of at least one reference plate are electrically coupled to the first wire, and each of at least one detecting plate is electrically coupled to one of the at least one second wire, wherein the dimension of each detecting plate is equal to or approximately equals the total dimension of all of the reference plates; taking one of the periods as an initial period, while other periods as detecting periods; in the initial period, recording the difference between each detection value and the reference value as an initial difference; in each detecting period, generating each detection value and the reference value as a detection difference for each detection value; and in each detecting period, identifying a detection value as one of first and second types if its detection difference is greater or less than the initial difference by a threshold, and a detection value is identified as the other of the first or second types if its detection difference is not greater or less than the initial difference by the threshold. - View Dependent Claims (12, 13, 14, 15)
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Specification