Input apparatus and display system
First Claim
1. An input apparatus comprising:
- a touch sensor including a transparent substrate with which an object is brought into contact, and a rectangular single sheet electrode formed on the transparent substrate from a transparent conductive film, to detect a contact point of the contacting object;
first detection means which inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a first direction, and takes out the measurement signal propagated through the rectangular single sheet electrode from another one of the two opposing perimeter portions, to detect the contact point along the first direction; and
second detection means which, after the contact point in the first direction is detected, inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a second direction intersecting the first direction, and takes out the measurement signal propagated through the rectangular single sheet electrode from another one of the two opposing perimeter portions, to detect the contact point along the second direction,wherein the measurement signal comprises an alternating current signal containing a frequency band in which contact between the rectangular single sheet electrode and the contacting object changes the alternating current signal, andwherein the input apparatus further comprises a correction circuit configured to correct the alternating current signal so as to contain a frequency at a peak value of a differential frequency characteristic, which is a difference between frequency characteristics of the rectangular single sheet electrode observed when the object is not in contact with the touch sensor and the frequency characteristics of the rectangular single sheet electrode observed when the object is in contact with the touch sensor, at a maximum value.
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Accused Products
Abstract
An input apparatus includes: a transparent substrate with which an object is brought into contact; a rectangular single sheet electrode formed on the transparent substrate; first detection means which inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a first direction, and takes out the measurement signal from another one of the two opposing perimeter portions, to detect a contact point of the contacting object along the first direction; and second detection means which, after the contact point in the first direction is detected, inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a second direction, and takes out the measurement signal from another one of the two opposing perimeter portions, to detect the contact point along the second direction.
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Citations
14 Claims
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1. An input apparatus comprising:
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a touch sensor including a transparent substrate with which an object is brought into contact, and a rectangular single sheet electrode formed on the transparent substrate from a transparent conductive film, to detect a contact point of the contacting object; first detection means which inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a first direction, and takes out the measurement signal propagated through the rectangular single sheet electrode from another one of the two opposing perimeter portions, to detect the contact point along the first direction; and second detection means which, after the contact point in the first direction is detected, inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a second direction intersecting the first direction, and takes out the measurement signal propagated through the rectangular single sheet electrode from another one of the two opposing perimeter portions, to detect the contact point along the second direction, wherein the measurement signal comprises an alternating current signal containing a frequency band in which contact between the rectangular single sheet electrode and the contacting object changes the alternating current signal, and wherein the input apparatus further comprises a correction circuit configured to correct the alternating current signal so as to contain a frequency at a peak value of a differential frequency characteristic, which is a difference between frequency characteristics of the rectangular single sheet electrode observed when the object is not in contact with the touch sensor and the frequency characteristics of the rectangular single sheet electrode observed when the object is in contact with the touch sensor, at a maximum value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display system comprising:
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a display panel including a display unit; a transparent substrate which is disposed on a display side of the display panel and with which an object comes into contact; a rectangular single sheet electrode which is formed on the transparent substrate from a transparent conductive film; first detection means which inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a first direction, and takes out the measurement signal propagated through the rectangular single sheet electrode from another one of the two opposing perimeter portions, to detect a contact point of the contacting object along the first direction; and second detection means which, after the contact point in the first direction is detected, inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a second direction intersecting the first direction, and takes out the measurement signal propagated through the rectangular single sheet electrode from another one of the two opposing perimeter portions, to detect the contact point along the second direction, wherein the measurement signal comprises an alternating current signal containing a frequency band in which contact between the rectangular single sheet electrode and the contacting object changes the alternating current signal, and wherein the display system further comprises a correction circuit configured to correct the alternating current signal so as to contain a frequency at a peak value of a differential frequency characteristic, which is a difference between frequency characteristics of the rectangular single sheet electrode observed when the object is not in contact with the touch sensor and the frequency characteristics of the rectangular single sheet electrode observed when the object is in contact with the touch sensor, at a maximum value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification