Touch sensor, display with touch sensor, and method for generating position data
First Claim
1. A display device with a touch sensor, the display device comprising:
- an active-matrix substrate including multiple pixel electrodes that are arranged in matrix on a first surface thereof; and
a transparent counter electrode, which is opposed to the first surface of the active-matrix substrate, wherein the display device further includes;
a first circuit for supplying a voltage or current to the transparent counter electrode for display purposes;
a second circuit for detecting currents flowing from multiple points on the transparent counter electrode; and
a switching circuit for selectively connecting electrically one of the first and second circuits to the transparent counter electrode.
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Accused Products
Abstract
A display device with a touch sensor according to the present invention includes an active matrix substrate 4A and a transparent counter electrode 7. On a first surface of the active matrix substrate, multiple pixel electrodes are arranged in matrix. The transparent counter electrode is opposed to the first surface of the active matrix substrate. The display device further includes a first circuit, a second circuit and a switching circuit. The first circuit supplies a voltage or a current to the transparent counter electrode for display purposes. The second circuit detects currents flowing from a number of points on the transparent counter electrode. And the switching circuit selectively connects electrically one of the first and second circuits to the transparent counter electrode.
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Citations
43 Claims
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1. A display device with a touch sensor, the display device comprising:
an active-matrix substrate including multiple pixel electrodes that are arranged in matrix on a first surface thereof; and
a transparent counter electrode, which is opposed to the first surface of the active-matrix substrate,wherein the display device further includes;
a first circuit for supplying a voltage or current to the transparent counter electrode for display purposes;
a second circuit for detecting currents flowing from multiple points on the transparent counter electrode; and
a switching circuit for selectively connecting electrically one of the first and second circuits to the transparent counter electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A display device with a touch sensor, the display device comprising:
a first substrate including multiple scanning electrodes that are arranged on a first surface thereof; and
a second substrate including multiple data electrodes that are opposed to the first surface of the first substrate,wherein the display device further includes;
a first circuit for supplying a voltage or current to each said data electrode for display purposes;
a second circuit for detecting currents flowing from multiple points on each said data electrode; and
a switching circuit for selectively connecting electrically one of the first and second circuits to the data electrode. - View Dependent Claims (11, 12, 13)
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10. A display device with a touch sensor, the display device comprising:
a first substrate including a first group of electrodes that are arranged on a first surface thereof; and
a second substrate including a second group of electrodes that are opposed to the first surface of the first substrate,wherein the display device further includes;
a first circuit for supplying a voltage or current to each said electrode of the first group for display purposes;
a second circuit for detecting currents flowing from multiple points on each said electrode of the first group; and
a switching circuit for selectively connecting electrically one of the first and second circuits to the electrode of the first group. - View Dependent Claims (36, 37, 38)
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14. A display device with a touch sensor, the display device comprising:
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a display medium having a display plane with a two-dimensional area;
driving means for generating an electric field in a selected portion of the display medium; and
location sensing means for locating a point of external contact on a plane, which is defined parallel to the display plane, by an electrostatic capacitive coupling technique, wherein the driving means includes a transparent electrode, and wherein the location sensing means is electrically connected to multiple points of the transparent electrode, thereby detecting a current associated with the point of contact.
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15. A touch sensor for locating an external input point on an operating plane, which expands in an X direction and in a Y direction, by an electrostatic capacitive coupling technique, the touch sensor comprising:
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a first location sensing transparent conductive film, which is provided parallel to the operating plane and which is electrically connected to a Y coordinate detecting conductive portion for detecting a coordinate of the input point in the Y direction;
a second location sensing transparent conductive film, which is provided so as to face the first location sensing transparent conductive film and which is electrically connected to an X coordinate detecting conductive portion for detecting a coordinate of the input point in the X direction;
a dielectric layer, which is provided between the first and second location sensing transparent conductive films; and
a switching circuit for selectively applying a predetermined voltage to one of the first and second location sensing transparent conductive films. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A display device with a touch sensor, the display device comprising:
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a display panel including a display medium layer, an electrode provided closer to a viewer than the display medium layer is so as to drive the display medium layer, and an insulating layer provided even closer to the viewer than the electrode is;
a location sensing transparent conductive film, which is provided so as to face the electrode with the insulating layer interposed between them; and
a detector circuit for detecting variations in currents flowing from multiple points on the location sensing transparent conductive film, wherein by applying a periodically changing oscillating voltage to the electrode, an induced voltage, and eventually an electric field, are generated in the location sensing transparent conductive film, and wherein in accordance with the variations in the currents to be produced by forming a point of contact on the location sensing transparent conductive film, location data is generated for the point of contact. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 39, 40, 41, 42, 43)
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33. A method of generating location data for a point of contact on a location sensing transparent conductive film, which is provided so as to face an electrode with an insulating layer interposed between them, the method comprising the steps of:
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applying a periodically changing oscillating voltage to the electrode, thereby generating an induced voltage, and eventually an electric field, in the location sensing transparent conductive film; and
generating location data for the point of contact in accordance with variations in currents to be produced by forming the point of contact on the location sensing transparent conductive film. - View Dependent Claims (34, 35)
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Specification