Display device
First Claim
1. A touch panel of capacitance type comprising:
- a plurality of X-electrodes;
a plurality of Y-electrodes intersecting with the plurality of X-electrodes;
a measurement circuit;
a data storage circuit including a two-dimensionally arranged data table; and
a control circuit;
whereinthe measurement circuit is configured to measure an interelectrode capacitance value at each intersection between the plurality of X-electrodes and the plurality of Y-electrodes by applying a pulse signal sequentially to one of the X-electrode and the Y-electrode, and detecting a signal from the other electrode,the two-dimensionally arranged data table is configured to store an interelectrode capacitance value measured by the measurement circuit at each of the intersections between the plurality of X-electrodes and the plurality of Y-electrodes,the control circuit is configured to calculate a touched position on the touch panel of capacitance type based on a local minimal point and a local maximal point,the local minimal point is an intersection where the interelectrode capacitance value is equal to or smaller than each of interelectrode capacitance values of all four adjacent peripheral intersections of the two-dimensionally arranged data table,the local maximal point is an intersection where the interelectrode capacitance value is equal to or bigger than each of interelectrode capacitance values of all four adjacent peripheral intersections of the two-dimensionally arranged data table,the control circuit is configured to determine that the touch panel of capacitance type is touched with a conductive object when the touched position is calculated based on the local minimal point,the control circuit is configured to determine that the touch panel of capacitance type is touched with an insulating object when the touched position is calculated based on the local maximal point,the control circuit is configured to calculate a signal value from the interelectrode capacitance value of the local minimal point, andthe signal value of the local minimal point is inverted and stored in the two-dimensionally arranged data table.
3 Assignments
0 Petitions
Accused Products
Abstract
A touch panel of capacitance type includes plural X-electrodes, plural Y-electrodes, and a Z-electrode. Each of the X-electrode and the Y-electrode is formed to have pad portions and thin line portions alternately arranged in an extending direction. The pad portion of the X-electrode and the pad portion of the Y-electrode are arranged without being overlapped in a planar view. The Z-electrode is electrically in a floating state, and formed to be overlapped with both the adjacent X-electrode and the Y-electrode in a planar view. The touched position is calculated based on a local minimal point as an intersection with the interelectrode capacitance value that is equal to or smaller than each of the interelectrode capacitance values of four peripheral intersections among those at the intersections between the plural X-electrodes and the plural Y-electrodes.
33 Citations
10 Claims
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1. A touch panel of capacitance type comprising:
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a plurality of X-electrodes; a plurality of Y-electrodes intersecting with the plurality of X-electrodes; a measurement circuit; a data storage circuit including a two-dimensionally arranged data table; and a control circuit;
whereinthe measurement circuit is configured to measure an interelectrode capacitance value at each intersection between the plurality of X-electrodes and the plurality of Y-electrodes by applying a pulse signal sequentially to one of the X-electrode and the Y-electrode, and detecting a signal from the other electrode, the two-dimensionally arranged data table is configured to store an interelectrode capacitance value measured by the measurement circuit at each of the intersections between the plurality of X-electrodes and the plurality of Y-electrodes, the control circuit is configured to calculate a touched position on the touch panel of capacitance type based on a local minimal point and a local maximal point, the local minimal point is an intersection where the interelectrode capacitance value is equal to or smaller than each of interelectrode capacitance values of all four adjacent peripheral intersections of the two-dimensionally arranged data table, the local maximal point is an intersection where the interelectrode capacitance value is equal to or bigger than each of interelectrode capacitance values of all four adjacent peripheral intersections of the two-dimensionally arranged data table, the control circuit is configured to determine that the touch panel of capacitance type is touched with a conductive object when the touched position is calculated based on the local minimal point, the control circuit is configured to determine that the touch panel of capacitance type is touched with an insulating object when the touched position is calculated based on the local maximal point, the control circuit is configured to calculate a signal value from the interelectrode capacitance value of the local minimal point, and the signal value of the local minimal point is inverted and stored in the two-dimensionally arranged data table. - View Dependent Claims (2, 3, 4, 5)
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6. A touch panel of capacitance type comprising:
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a plurality of X-electrodes; a plurality of Y-electrodes intersecting with the plurality of X-electrodes; a measurement circuit; a data storage circuit including a two-dimensionally arranged data table; and a control circuit;
whereinthe measurement circuit is configured to measure a capacitance value at each intersection between the plurality of X-electrodes and the plurality of Y-electrodes, the two-dimensionally arranged data table is configured to store the capacitance value measured by the measurement circuit at each of the intersections between the plurality of X-electrodes and the plurality of Y-electrodes, the control circuit is configured to calculate a touched position on the touch panel of capacitance type based on a local minimal point and a local maximal point, the local minimal point is an intersection where the capacitance value is equal to or smaller than each of capacitance values of all four adjacent peripheral intersections of the two-dimensionally arranged data table, the local maximal point is an intersection where the capacitance value is equal to or bigger than each of capacitance values of all four adjacent peripheral intersections of the two-dimensionally arranged data table, the control circuit is configured to determine that the touch panel of capacitance type is touched with a conductive object when the touched position is calculated based on the local minimal point, the control circuit is configured to determine that the touch panel of capacitance type is touched with an insulating object when the touched position is calculated based on the local maximal point, the control circuit is configured to calculate a signal value from the capacitance value of the local minimal point, and the signal value of the local minimal point is inverted and stored in the two-dimensionally arranged data table. - View Dependent Claims (7, 8, 9, 10)
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Specification