INTEGRATED TOUCH PANEL FOR A TFT DISPLAY
First Claim
1. A touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality comprising:
- a plurality of pixels, each pixel including a storage capacitor comprising a first electrode and a second electrode, the plurality of pixels forming drive regions and sense regions;
one or more opaque display elements used to perform the display functionality of the touch screen; and
a plurality of common lines made from a non-transparent conductor, connected to the first electrode of one or more of the plurality of pixels and positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another ;
wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and
wherein the first electrodes connected to the common lines are used in the touch sensing functionality for drive signals in the drive regions and sense signals in the sense regions, the sense signals generated by capacitive coupling between the drive and sense regions; and
wherein the first electrodes connected to the common lines are used in the display functionality for display data signals.
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Accused Products
Abstract
This relates to displays for which the use of dual function capacitive elements does not result in any decreases of the aperture of the display. Thus, touch sensitive displays that have aperture ratios that are no worse than similar non-touch sensing displays can be manufactured. More specifically, this relates to placing touch sensing opaque elements so as to ensure that they are substantially overlapped by display related opaque elements, thus ensuring that the addition of the touch sensing elements does not substantially reduce the aperture ratio. The touch sensing display elements can be, for example, common lines that connect various capacitive elements that are configured to operate collectively as an element of the touch sensing system.
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Citations
36 Claims
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1. A touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality comprising:
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a plurality of pixels, each pixel including a storage capacitor comprising a first electrode and a second electrode, the plurality of pixels forming drive regions and sense regions; one or more opaque display elements used to perform the display functionality of the touch screen; and a plurality of common lines made from a non-transparent conductor, connected to the first electrode of one or more of the plurality of pixels and positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another ; wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and wherein the first electrodes connected to the common lines are used in the touch sensing functionality for drive signals in the drive regions and sense signals in the sense regions, the sense signals generated by capacitive coupling between the drive and sense regions; and wherein the first electrodes connected to the common lines are used in the display functionality for display data signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A digital media player including a touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality, comprising:
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a plurality of pixels, each pixel including a storage capacitor comprising a first electrode and a second electrode, the plurality of pixels forming drive regions and sense regions; one or more opaque display elements used to perform the display functionality of the touch screen; and a plurality of common lines made from a non-transparent conductor, connected to the first electrode of one or more of the plurality of pixels and positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another the common lines; wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and wherein the first electrodes connected to the common lines are used in the touch sensing functionality for drive signals in the drive regions and sense signals in the sense regions, the sense signals generated by capacitive coupling between the drive and sense regions; and wherein the first electrodes connected to the common lines are used in the display functionality for display data signals.
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14. A mobile telephone including a touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality, comprising:
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a plurality of pixels, each pixel including a storage capacitor comprising a first electrode and a second electrode; one or more opaque display elements used to perform the display functionality of the touch screen; and a plurality of common lines made from a non-transparent conductor, connected to the first electrode of one or more of the plurality of pixels and positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another; wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and wherein the first electrodes connected to the common lines are used in the touch sensing functionality for drive signals in the drive regions and sense signals in the sense regions, the sense signals generated by capacitive coupling between the drive and sense regions; and wherein the first electrodes connected to the common lines are used in the display functionality for display data signals.
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15. A touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality, comprising:
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a plurality of pixels including a plurality of sets of pixels, each set of pixels comprising two or more pixels; a plurality of common electrodes, each common electrode serving as a storage capacitor electrode for a respective set of pixels; one or more opaque display elements used to perform the display functionality of the touch screen; and a plurality of common lines made from a non-transparent conductor, connected to the plurality of common electrodes and positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another; wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and wherein the first electrodes connected to the common lines are used in the touch sensing functionality for drive signals in the drive regions and sense signals in the sense regions, the sense signals generated by capacitive coupling between the drive and sense regions; and wherein the first electrodes connected to the common lines are used in the display functionality for display data signals. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for manufacturing a touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality comprising:
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forming a plurality of pixels, each pixel including a storage capacitor comprising a first electrode and a second electrode; forming drive and sense regions from the plurality of pixels; forming one or more opaque display elements used to perform the display functionality of the touch screen; forming a plurality of common lines from a non-transparent conductor, the common lines being positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another; and connecting respective ones of the plurality of common lines to one or more of the first electrodes of the plurality of pixels; wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and wherein the first electrodes connected to the common lines are used in the touch sensing functionality for drive signals in the drive regions and sense signals in the sense regions, the sense signals generated by capacitive coupling between the drive and sense regions; and wherein the first electrodes connected to the common lines are used in the display functionality for display data signals. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for manufacturing a touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality including:
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forming a plurality of pixels including a plurality of sets of pixels, each set of pixels comprising two or more pixels; forming drive and sense regions from the plurality of sets of pixels; forming a plurality of common electrodes, each common electrode serving as a storage capacitor electrode for a respective set of pixels; forming one or more opaque display elements used to perform the display functionality of the touch screen; forming a plurality of common lines from a non-transparent conductor and positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another; and connecting the plurality of common lines to the plurality of common electrodes, wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and wherein the common electrodes connected to the common lines are used in the touch sensing functionality for drive signals in the drive regions and sense signals in the sense regions, the sense signals generated by capacitive coupling between the drive and sense regions; and wherein the common electrodes connected to the common lines are used in the display functionality for display data signals. - View Dependent Claims (31, 32, 33, 34, 35)
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36. A personal computer including a touch screen having a touch sensor panel and a display device, the touch screen configured to perform both a display and a touch sensing functionality, comprising:
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a plurality of pixels, each pixel including a storage capacitor comprising a first electrode and a second electrode, the plurality of pixels forming drive regions and sense regions; one or more opaque display elements used to perform the display functionality of the touch screen; and a plurality of common lines made from a non-transparent conductor, connected to the first electrode of one or more of the plurality of pixels and positioned at a different layer in the touch screen than the opaque display elements such that the opaque display elements and the common lines substantially overlap one another; wherein the opaque display elements contribute to an aperture ratio of the display device and the plurality of common lines substantially maintain the aperture ratio of the display device; and wherein the first electrodes connected to the common lines are used in the touch sensing functionality for drive signals in the drive regions and sense signals in the sense regions, the sense signals generated by capacitive coupling between the drive and sense regions; and wherein the first electrodes connected to the common lines are used in the display functionality for display data signals.
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Specification