TOUCH PANEL APPARATUS AND METHOD FOR DETECTING DISTANCE BETWEEN TOUCH INPUT POINTS ON TOUCH PANEL
First Claim
1. A touch panel apparatus comprising:
- a touch panel having two resistance films, each having a pair of electrode terminals at edge side portions opposing each other, the two resistance films closely opposing each other to be capable of being in contact with each other so that the pair of electrode terminals are vertically perpendicular to each other;
a between-terminal resistance measuring unit for measuring a resistance value of the pair of electrode terminals;
a two-point touch determining unit for determining whether or not two points are touched on the touch panel based upon the resistance value measured by the between-terminal resistance measuring unit;
a pressing force detector for detecting a pressing force of a touch input when the two-point touch determining unit determines that the two points are touched; and
a two-point distance detector for detecting a distance between the two points based upon the resistance value measured by the between-terminal resistance measuring unit and the pressing force measured by the pressing force detector, when the two-point touch determining unit determines that the two points are touched.
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Accused Products
Abstract
There are provided a touch panel apparatus and a method for detecting a distance between touch input points of a touch panel, with which it is possible to detect the distance between two points with accuracy, when two points are touched on the touch panel. Whether or not two points are touched on the touch panel TP is determined based upon a resistance value between terminals opposing each other. When it is determined that two points are touched, the distances between touched two points XDual and YDual are detected. In this situation, the distances between touched two points XDual and YDual are detected based upon the resistance value of the opposing terminals and a pressing force (contact resistance value) of the touch input points.
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Citations
7 Claims
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1. A touch panel apparatus comprising:
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a touch panel having two resistance films, each having a pair of electrode terminals at edge side portions opposing each other, the two resistance films closely opposing each other to be capable of being in contact with each other so that the pair of electrode terminals are vertically perpendicular to each other; a between-terminal resistance measuring unit for measuring a resistance value of the pair of electrode terminals; a two-point touch determining unit for determining whether or not two points are touched on the touch panel based upon the resistance value measured by the between-terminal resistance measuring unit; a pressing force detector for detecting a pressing force of a touch input when the two-point touch determining unit determines that the two points are touched; and a two-point distance detector for detecting a distance between the two points based upon the resistance value measured by the between-terminal resistance measuring unit and the pressing force measured by the pressing force detector, when the two-point touch determining unit determines that the two points are touched. - View Dependent Claims (2, 5)
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3. A touch panel apparatus comprising,
a touch panel composed of two resistance films, each having a pair of electrode terminals at edge side portions opposing each other, the two resistance films closely opposing each other to be capable of being in contact with each other so that the pair of electrode terminals are vertically perpendicular to each other; -
a first voltage detector for, with a power-supply voltage being applied between the pair of the electrode terminals of one of the resistance films and with the pair of the electrode terminals of the other of the resistance films being short-circuited, detecting a voltage of any one of the pair of electrode terminals of the other of the resistance films; a second voltage detector for, with a power-supply voltage being applied, through a resistance, between the pair of the electrode terminals of one of the resistance films and with the pair of the electrode terminals of the other of the resistance films being short-circuited, detecting a voltage of any one of the pair of electrode terminals of the other of the resistance films; a two-point touch determining unit for determining whether or not two points are touched on the touch panel based upon a ratio of the voltage detected by the first voltage detector and the voltage detected by the second voltage detector; a pressing force detector for detecting a pressing force of a touch input when the two-point touch determining unit determines that the two points are touched; and a two-point distance detector for detecting a distance between the two points based upon the ratio of the voltage detected by the first voltage detector and the voltage detected by the second voltage detector, and the pressing force measured by the pressing force detector, when the two-point touch determining unit determines that the two points are touched. - View Dependent Claims (4)
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6. A method for detecting a distance between touch input points of a touch panel, the method comprising:
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a between-terminal resistance measuring step for measuring a resistance value of a pair of electrode terminals arranged at edge side portions opposing each other in each of two resistance films in the touch panel, the two resistance films closely opposing each other to be capable of being in contact with each other so that the pair of electrode terminals are vertically perpendicular to each other; a two-point touch determining step for determining whether or not two points are touched on the touch panel based upon the resistance value measured by the between-terminal resistance measuring step; a pressing force detecting step for detecting a pressing force of a touch input when the two-point touch determining step determines that the two points are touched; and a two-point distance detecting step for detecting a distance between the two points based upon the resistance value measured by the between-terminal resistance measuring step and the pressing force measured by the pressing force detecting step, when the two-point touch determining step determines that the two points are touched.
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7. A method for detecting a distance between touch input points of a touch panel, the method comprising:
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a first voltage detecting step for, with a power-supply voltage being applied between a pair of the electrode terminals arranged at edge side portions opposing each other in each of two resistance films in a touch panel, the two resistance films closely opposing each other to be capable of being in contact with each other so that the pair of electrode terminals are vertically perpendicular to each other, and with the pair of the electrode terminals of the other of the resistance films being short-circuited, detecting a voltage of any one of the pair of electrode terminals of the other of the resistance films; a second voltage detecting step for, with a power-supply voltage being applied, through a resistance, between the pair of the electrode terminals of one of the resistance films and with the pair of the electrode terminals of the other of the resistance films being short-circuited, detecting a voltage of any one of the pair of electrode terminals of the other of the resistance films; a two-point touch determining step for determining whether or not two points are touched on the touch panel based upon a ratio of the voltage detected by the first voltage detecting step and the voltage detected by the second voltage detecting step; a pressing force detecting step for detecting a pressing force of a touch input when the two-point touch determining step determines that the two points are touched; and a two-point distance detecting step for detecting a distance between the two points based upon the ratio of the voltage detected by the first voltage detecting step and the voltage detected by the second voltage detecting step, and the pressing force measured by the pressing force detecting step, when the two-point touch determining step determines that the two points are touched.
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Specification