A touch panel having a transparent capacitive sensing medium configured to detect multiple touches or near touches that occur at the same time and at distinct locations in the plane of the touch panel and to produce distinct signals representative of the location of the touches on the plane of the t
A touch panel having a transparent capacitive sensing medium configured to detect multiple touches or near touches that occur at the same time and at distinct locations in the plane of the touch panel and to produce distinct signals representative of the location of the touches on the plane of the touch panel for each of the multiple touches is disclosed.
대표청구항▼
1. A device comprising: a touch sensor panel configured to detect multiple touches or near touches that occur at a same time and at distinct locations in a plane of the touch sensor panel, the touch sensor panel comprising: a first layer having a plurality of transparent first conductive lines that
1. A device comprising: a touch sensor panel configured to detect multiple touches or near touches that occur at a same time and at distinct locations in a plane of the touch sensor panel, the touch sensor panel comprising: a first layer having a plurality of transparent first conductive lines that are electrically isolated from one another; anda second layer spatially separated from the first layer and having a plurality of transparent second conductive lines that are electrically isolated from one another, the second conductive lines being positioned transverse to the first conductive lines, the intersection of transverse lines being positioned at different locations in a plane of the touch sensor panel;capacitive monitoring circuitry configured to detect a decrease in charge coupling between the first conductive lines and the second conductive lines; anda display device positioned adjacent the touch sensor panel. 2. The device of claim 1, wherein the capacitive monitoring circuitry including a virtual ground charge amplifier. 3. The device of claim 2 wherein the transparent first conductive lines of the first layer are disposed on a first member, and wherein the transparent second conductive lines of the second layer are disposed on a second member, the first member being disposed over the second member. 4. The device of claim 3, further including a third member disposed over the first member, the first and second members being attached to one another via an adhesive layer, the third member being attached to the first member via another adhesive layer. 5. The device of claim 2, wherein the first conductive lines and the second conductive lines are coupled by mutual capacitive coupling. 6. The device of claim 2, wherein the first and second conductive lines are positioned on opposite sides of the same substrate. 7. The device of claim 2, wherein the first conductive lines have different shapes. 8. The device of claim 2, wherein the first and second conductive lines have different shapes. 9. The device of claim 2, wherein at least some of the first conductive lines have different shape from at least some of the second conductive lines. 10. The device of claim 2, wherein the geometry of the first lines are the same. 11. The device of claim 10, wherein the geometry of the first lines includes at least one of linewidths or spacings. 12. The device of claim 2, wherein the spacing of the first and second lines are the same. 13. The device of claim 2, wherein the geometry of the first lines are the same in the first layer and the geometry of the second lines are the same in the second layer. 14. The device of claim 1 wherein the transparent first conductive lines of the first layer are disposed on a first member, and wherein the transparent second conductive lines of the second layer are disposed on a second member, the first member being disposed over the second member. 15. The device of claim 14, further including a third member disposed over the first member, the first and second members being attached to one another via an adhesive layer, the third member being attached to the first member via another adhesive layer. 16. The device of claim 1, wherein the first and second conductive lines are positioned on opposite sides of the same substrate. 17. A touch panel comprising a transparent capacitive sensing medium configured to detect multiple touches or near touches that occur at a same time and at distinct locations in a plane of the touch panel and to produce distinct signals representative of a location of the touches on the plane of the touch panel for each of the multiple touches, wherein the transparent capacitive sensing medium comprises: a first layer having a plurality of transparent first conductive lines that are electrically isolated from one another; anda second layer spatially separated from the first layer and having a plurality of transparent second conductive lines that are electrically isolated from one another, the second conductive lines being positioned transverse to the first conductive lines, the intersection of transverse lines being positioned at different locations in the plane of the touch panel, each of the second conductive lines being operatively coupled to capacitive monitoring circuitry;wherein the capacitive monitoring circuitry is configured to detect decreases in charge coupling between the first conductive lines and the second conductive lines. 18. The touch panel as recited in claim 17 wherein the conductive lines on each of the layers are substantially parallel to one another. 19. The touch panel as recited in claim 18 wherein the conductive lines on different layers are substantially perpendicular to one another. 20. The touch panel as recited in claim 17 wherein the transparent first conductive lines of the first layer are disposed on a first member, and wherein the transparent second conductive lines of the second layer are disposed on a second member, the first member being disposed over the second member. 21. The touch panel as recited in claim 20 further including a third member disposed over the first member, the first and second members being attached to one another via an adhesive layer, the third member being attached to the first member via another adhesive layer. 22. The touch panel as recited in claim 17, wherein the capacitive sensing medium is a mutual capacitance sensing medium. 23. The touch panel as recited in claim 22, further comprising a virtual ground charge amplifier coupled to the touch panel for detecting the touches on the touch panel. 24. The touch panel as recited in claim 17, the transparent capacitive sensing medium formed on both sides of a single substrate. 25. A device comprising: a display having a screen for displaying a graphical user interface; anda transparent touch panel allowing the screen to be viewed therethrough and capable of recognizing multiple touch events that occur at different locations on the touch panel at a same time;wherein the touch panel includes a multipoint sensing arrangement configured to simultaneously detect the touch events and a decrease in capacitive coupling associated with those touch events at distinct points across the touch panel; and wherein the touch panel comprises:a first member disposed over the screen of the display;a first transparent conductive layer disposed over the first member, the first transparent conductive layer comprising a plurality of spaced apart parallel lines;a second member disposed over the first transparent conductive layer;a second transparent conductive layer disposed over the second member, the second transparent conductive layer comprising a plurality of spaced apart parallel lines, the parallel lines of the second transparent conductive layer being substantially perpendicular to the parallel lines of the first transparent conductive layer; andone or more sensor integrated circuits operatively coupled to the lines to measure the decrease in capacitive coupling between the parallel lines of the first transparent conductive layer and the parallel lines of the second transparent conductive layer. 26. The device of claim 25 further including dummy features disposed in the space between the parallel lines, the dummy features optically improving the visual appearance of the touch screen by more closely matching the optical index of the lines. 27. The device of claim 25, further comprising a third member disposed over the second transparent conductive layer. 28. The device of claim 25, wherein the one or more sensor circuits includes a virtual ground charge amplifier. 29. The device of claim 28, further including dummy features disposed in the space between the first plurality of parallel lines and the second plurality of parallel lines, the dummy features optically improving the visual appearance of the touch screen by more closely matching the optical index of the first and second plurality of parallel lines.
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