CAPACITIVE CONTROLLER AND SENSOR
First Claim
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1. A capacitive controller, executing:
- providing an 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; and
comparing a first signal difference with a second signal difference between one of the at least one second wire and the first wire so as to determine if the detecting plate electrically coupled to the second wire corresponding to the second signal difference is touched or approached by an external object, wherein the first signal difference is a difference between the first wire and one of the at least one second wire not touched or approached by any external object.
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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.
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Citations
20 Claims
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1. A capacitive controller, executing:
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providing an 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; and comparing a first signal difference with a second signal difference between one of the at least one second wire and the first wire so as to determine if the detecting plate electrically coupled to the second wire corresponding to the second signal difference is touched or approached by an external object, wherein the first signal difference is a difference between the first wire and one of the at least one second wire not touched or approached by any external object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A capacitive sensor, comprising:
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a first wire; at least one second wire; at least one reference plate for defining at least one space, and all of the reference plates being electrically coupled to the first wire; at least one detecting plate, each of which residing in one of the at least one space and being electrically coupled to one of the at least one second wire; and a controller for providing an electrical signal to the first wire and each second wire, and comparing a first signal difference with a second signal difference between one of the at least one second wire and the first wire so as to determine if the detecting plate electrically coupled to the second wire corresponding to the second signal difference is touched or approached by an external object, wherein the first signal difference is a difference between the first wire and one of the at least one second wire not touched or approached by any external object. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. The capacitive sensor of claim sensor 11, wherein the second wire corresponding to the first signal difference is different from the second wire corresponding to the second signal difference, and the first signal difference and the second signal difference are detected synchronously or asynchronously.
Specification