Coordinate input device detecting touch on board associated with liquid crystal display, and electronic device therefor
First Claim
1. A coordinate input device for inputting coordinates on a screen of a display, comprising:
- a board providing a coordinate input surface; and
at least one vibration detector that is arranged on the board or in a periphery of the coordinate input surface to detect vibration that occurs on the coordinate input surface of the board.
1 Assignment
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Accused Products
Abstract
A coordinate input device is associated with a liquid crystal display to detect a touch or contact thereon. A transparent board is arranged on the screen of the display to provide a coordinate input surface having a substantially rectangular shape. At least one vibration detector (e.g., a microphone or piezoelectric element) is attached onto the board to detect vibration or sound that occurs when a position input member is brought into contact with the coordinate input surface at an arbitrary input position. The input position is represented as one-dimensional coordinate based on outputs of two vibration detectors, or it is represented as two-dimensional coordinates based on outputs of three vibration detectors. Thus, the manually designated input position is detected and is electronically displayed on the screen of the display. As the position input member, it is possible to use a pen, a fingernail, etc.
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Citations
26 Claims
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1. A coordinate input device for inputting coordinates on a screen of a display, comprising:
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a board providing a coordinate input surface; and
at least one vibration detector that is arranged on the board or in a periphery of the coordinate input surface to detect vibration that occurs on the coordinate input surface of the board. - View Dependent Claims (2, 3, 9)
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4. A coordinate input device for inputting coordinates on a screen of a display, comprising:
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a board providing a coordinate input surface;
a plurality of vibration detectors that are arranged on the board or in a periphery of the coordinate input surface, wherein each of the vibration detectors detects vibration or sound that occurs when a position input member is brought into contact with the coordinate input surface of the board at an arbitrary input position; and
calculation means for performing calculations based on a time difference between vibration detection signals respectively output from the plurality of vibration detectors, thus determining the input position at which the vibration occurs on the coordinate input surface of the board. - View Dependent Claims (5, 6, 8)
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7. A coordinate input device for inputting coordinates on a screen of a display, comprising:
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a board providing a coordinate input surface that has a substantially rectangular shape;
a plurality of vibration detectors that are arranged in proximity to prescribed corners of the coordinate input surface of the board, wherein each of the vibration detectors detects vibration or sound that occurs when a position input member is brought into contact with the coordinate input surface of the board at an arbitrary input position; and
calculation means for performing calculations based on vibration detection signals respectively output from the plurality of vibration detectors, thus producing one-dimensional coordinate or two-dimensional coordinates as representation of the input position at which the vibration occurs on the coordinate input surface of the board, wherein a plurality of projections are arranged on the coordinate input surface of the board.
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10. A liquid crystal display associating with a coordinate input device, comprising:
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a transparent board attached onto a screen, wherein the transparent board provides a coordinate input surface substantially having a rectangular shape;
a plurality of vibration detectors that are arranged in proximity to prescribed corners of the coordinate input surface of the transparent board, wherein each of the vibration detectors detects vibration or sound that occurs when a position input member is brought into contact with the coordinate input surface of the transparent board at an arbitrary input position;
calculation means for performing calculations based on vibration detection signals respectively output from the plurality of vibration detectors, thus producing coordinate information as representation of the input position at which the vibration occurs on the coordinate input surface of the transparent board; and
a display controller for displaying the input position on the screen based on the coordinate information produced by the calculation means. - View Dependent Claims (11, 12, 13, 14, 16, 17, 18)
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15. An electroluminescent (EL) display associating with a coordinate input device, comprising:
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a transparent board attached onto a screen, wherein the transparent board provides a coordinate input surface substantially having a rectangular shape;
a plurality of vibration detectors that are arranged in proximity to prescribed corners of the coordinate input surface of the transparent board, wherein each of the vibration detectors detects vibration or sound that occurs when a position input member is brought into contact with the coordinate input surface of the transparent board at an arbitrary input position;
calculation means for performing calculations based on vibration detection signals respectively output from the plurality of vibration detectors, thus producing coordinate information as a representation of the input position at which the vibration occurs on the coordinate input surface of the transparent board; and
a display controller for displaying the input position on the screen based on the coordinate information produced by the calculation means. - View Dependent Claims (19)
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20. A display associating with a coordinate input device, comprising:
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a board providing a coordinate input surface that substantially has a rectangular shape;
a vibration detector that is arranged on the board or in a periphery of the coordinate input surface, wherein the vibration detector detects vibration or sound that occurs when a position input member is brought into contact with the coordinate input surface of the board at an arbitrary input position; and
a switching circuit that is activated to perform a prescribed switching operation in response to the vibration or sound that is detected by the vibration detector.
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21. An electronic device comprising:
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a display; and
a coordinate input device that comprises a transparent board attached onto a screen of the display, wherein the transparent board has a coordinate input surface substantially having a rectangular shape, at least one vibration detector that is arranged on the transparent board or in a periphery of the coordinate input surface, wherein the vibration detector detects vibration or sound that occurs when a position input member is brought into contact with the coordinate input surface of the transparent board at an arbitrary input position, and calculation means for performing calculations based on a vibration detection signal output from the vibration detector, thus producing coordinate information as a representation of the input position at which the vibration occurs on the coordinate input surface of the transparent board, wherein the input position is displayed on the screen of the display based on the coordinate information produced by the calculation means. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification