Method and apparatus for two-finger touch coordinate recognition and rotation gesture recognition
First Claim
1. A resistive touchscreen system, comprising:
- a coversheet comprising a first conductive coating;
a substrate comprising a second conductive coating, the substrate and the coversheet positioned proximate each other such that the first conductive coating faces the second conductive coating, the substrate and coversheet being electrically disconnected with respect to each other in the absence of a touch; and
a controller configured to (a) identify a multiple touch state when the substrate and coversheet are electrically connected with respect to each other at least two touch locations, (b) detect, over time, a plurality of apparent touch coordinates, (c1) identify two possible X coordinates and two possible Y coordinates associated with at least one of the apparent touch coordinates, (c2) determine when the apparent touch coordinates vary along a line segment, and (d) identify coordinate locations of two touches based on the line segment when the apparent touch coordinates vary along the line segment, and based on the two possible X coordinates and the two possible Y coordinates.
9 Assignments
0 Petitions
Accused Products
Abstract
A resistive touchscreen system comprises a substrate, a coversheet and a controller. The coversheet comprises a first conductive coating and the substrate comprises a second conductive coating. The substrate and coversheet are positioned proximate each other such that the first conductive coating faces the second conductive coating, and the substrate and coversheet are electrically disconnected with respect to each other in the absence of a touch. The controller is configured to (a) identify a multiple touch state when the substrate and coversheet are electrically connected with respect to each other at at least two touch locations, (b) to detect, over time, a plurality of apparent touch coordinates, (c) identify two possible X coordinates and two possible Y coordinates associated with at least one of the apparent touch coordinates, and (d) identify coordinate locations of two touches based on the apparent touch coordinates and the two possible X and Y coordinates.
36 Citations
19 Claims
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1. A resistive touchscreen system, comprising:
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a coversheet comprising a first conductive coating; a substrate comprising a second conductive coating, the substrate and the coversheet positioned proximate each other such that the first conductive coating faces the second conductive coating, the substrate and coversheet being electrically disconnected with respect to each other in the absence of a touch; and a controller configured to (a) identify a multiple touch state when the substrate and coversheet are electrically connected with respect to each other at least two touch locations, (b) detect, over time, a plurality of apparent touch coordinates, (c1) identify two possible X coordinates and two possible Y coordinates associated with at least one of the apparent touch coordinates, (c2) determine when the apparent touch coordinates vary along a line segment, and (d) identify coordinate locations of two touches based on the line segment when the apparent touch coordinates vary along the line segment, and based on the two possible X coordinates and the two possible Y coordinates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for identifying coordinate locations of two touches on a resistive touchscreen system, comprising:
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identifying a multiple touch state on a touchscreen based on a decrease in at least one of X and Y bias load resistance values; identifying at least N consecutive apparent touch coordinates; determining when the at least N consecutive apparent touch coordinates vary along a line segment; and identifying coordinate locations of two touches that lie along the line segment, the coordinate locations based on the X and Y bias load resistance values and the line segment when the apparent touch coordinates vary along the line segment. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification