ELECTRODE CONFIGURATIONS FOR PROJECTED CAPACITIVE TOUCH SCREEN
First Claim
1. A projected capacitive touch screen, comprising:
- a substrate that defines an active touch zone surrounded by edges, the active touch zone including a central active zone and an acceleration zone that is located proximate to, and extends along, at least one of the edges; and
electrodes provided on the substrate, the electrodes being organized into first and second sets of electrodes that are contained within a common plane on the substrate, the first set of electrodes being interlaced with the second set of electrodes in a non-overlapping pattern on the substrate, wherein at least a subset of the electrodes each has an apex and a base and a non-uniform triangular shape that extends along a longitudinal axis between the apex and the base, the subset of the electrodes being located such that at least a portion of the non-uniform triangular shape is located within the acceleration zone.
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Accused Products
Abstract
A projected capacitive touch screen is provided that comprises a substrate and electrodes. The substrate defines an active touch zone surrounded by edges. The active touch zone includes a central active zone and an acceleration zone that is located proximate to, and extends along, at least one of the edges. The electrodes are provided on the substrate and are organized into first and second sets of electrodes that are contained within a common plane on the substrate. The first set of electrodes is interlaced with the second set of electrodes in a non-overlapping pattern on the substrate. At least a subset of the electrodes each has an apex and a base and a non-uniform triangular shape that extends along a longitudinal axis between the apex and the base. The subset of the electrodes is located such that at least a portion of the non-uniform triangular shape is located within the acceleration zone. The non-uniform triangular shape may be formed in part by varying an electrode width more rapidly near a perimeter of the active touch zone than the variation of the electrode width near a center of the active touch zone. The non-uniform triangular shape and non-overlapping pattern provide edge acceleration to compensate for signal loss when a portion of a finger contact area moves beyond the edge outside of the active touch zone. The non-uniform triangular shape may include a first pitch proximate to the base and a second pitch proximate to the apex. The pitch represents a rate of change in a width of the electrode per unit of distance along the longitudinal axis of the electrode.
79 Citations
20 Claims
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1. A projected capacitive touch screen, comprising:
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a substrate that defines an active touch zone surrounded by edges, the active touch zone including a central active zone and an acceleration zone that is located proximate to, and extends along, at least one of the edges; and electrodes provided on the substrate, the electrodes being organized into first and second sets of electrodes that are contained within a common plane on the substrate, the first set of electrodes being interlaced with the second set of electrodes in a non-overlapping pattern on the substrate, wherein at least a subset of the electrodes each has an apex and a base and a non-uniform triangular shape that extends along a longitudinal axis between the apex and the base, the subset of the electrodes being located such that at least a portion of the non-uniform triangular shape is located within the acceleration zone. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12)
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13. A projected capacitive touch screen, comprising:
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a substrate that defines an active touch zone surrounded by edges, the active touch zone including a central active zone and an acceleration zone that is located proximate to, and extends along, at least one of the edges; and electrodes provided on the substrate, the electrodes being organized into first and second sets of electrodes that are contained within a common plane on the substrate, the first set of electrodes being interlaced with the second set of electrodes in a non-overlapping pattern on the substrate, wherein at least a subset of the electrodes each has opposed non-parallel first and second sides, the subset of the electrodes each having an apex segments a base segment and an intermediate body segment therebetween, wherein the first side has a first pitch in the intermediate segment and a second pitch in at least one of the apex and base segments, the subset of the electrodes being located such that at least one of the apex and base segments is located within the acceleration zone. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. An electronic device, comprising:
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a processor, memory storing instructions to control operation of the processor, and a display for presenting information to a user, the display including a projected capacitive touch screen that comprises; a substrate that defines an active touch zone surrounded by edges, the active touch zone including a central active zone and an acceleration zone that is located proximate to, and extends along, at least one of the edges; electrodes provided on the substrate, the electrodes being organized into first and second sets of electrodes that are contained within a common plane on the substrate, the first set of electrodes being interlaced with the second set of electrodes in a non-overlapping pattern on the substrate, wherein at least a subset of the electrodes each has an apex and a base and a non-uniform triangular shape that extends along a longitudinal axis between the apex and the base, the subset of the electrodes being located such that at least a portion of the non-uniform triangular shape is located within the acceleration zone.
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Specification