Touch sensor panels with reduced static capacitance
First Claim
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1. A touch sensitive panel comprising:
- a first voltage line driven at a first phase;
a second voltage line driven at a second phase that is different than the first phase;
a first and second drive region coupled to the first voltage line; and
a sense region disposed between the first and second drive regions along a first direction;
wherein the first voltage line and the second voltage line cross the sense region;
each of the first and second drive regions comprising a first plurality of display pixels having pixel electrodes and common electrodes, the common electrodes receiving a stimulation voltage along the first voltage line during a touch sensing mode of operation;
the sense region comprising a second plurality of display pixels having pixel electrodes and common electrodes, the common electrodes of the sense region connected to touch sensing circuitry during the touch sensing mode of operation;
the pixel electrodes of the first and second drive region and the sense region receiving a data signal during a display mode of operation; and
wherein the first and second phases of the first and second voltage lines reduce static capacitance in the sense region as compared to a configuration in which the second voltage lines are not utilized.
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Abstract
Capacitive touch panels may include a plurality of positive voltage lines that are driven at a first phase. These positive voltage lines may be used to provide the drive capacitance signal sensed by one or more sense regions. The touch panels may also include a plurality of negative phase voltage lines that are driven at a phase that is different than the first phase. Both the positive and negative voltage lines may cross-under one or more sense regions. The negative phase voltage lines are able to counter act and reduce the static capacitance in the sense regions.
32 Citations
17 Claims
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1. A touch sensitive panel comprising:
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a first voltage line driven at a first phase; a second voltage line driven at a second phase that is different than the first phase; a first and second drive region coupled to the first voltage line; and a sense region disposed between the first and second drive regions along a first direction; wherein the first voltage line and the second voltage line cross the sense region; each of the first and second drive regions comprising a first plurality of display pixels having pixel electrodes and common electrodes, the common electrodes receiving a stimulation voltage along the first voltage line during a touch sensing mode of operation; the sense region comprising a second plurality of display pixels having pixel electrodes and common electrodes, the common electrodes of the sense region connected to touch sensing circuitry during the touch sensing mode of operation; the pixel electrodes of the first and second drive region and the sense region receiving a data signal during a display mode of operation; and wherein the first and second phases of the first and second voltage lines reduce static capacitance in the sense region as compared to a configuration in which the second voltage lines are not utilized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of reducing static capacitance in a touch panel having a first and second drive region positioned along a first direction with a sense region disposed therebetween, each of the first and second drive regions comprising a first plurality of display pixels having pixel electrodes and common electrodes, the common electrodes receiving a stimulation voltage along a first voltage line during a touch sensing mode of operation;
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the sense region comprising a second plurality of display pixels having pixel electrodes and common electrodes, the common electrodes of the sense region connected to touch sensing circuitry during the touch sensing mode of operation; the pixel electrodes of the first and second drive region and the sense region receiving a data signal during a display mode of operation; the method comprising;
driving the first voltage line at a first phase;driving a second voltage line at a second phase that is different than the first phase; wherein the first voltage line and the second voltage line cross the sense region; and
wherein the first and second phases of the first and second voltage lines reduce static capacitance in the sense region as compared to a configuration in which the second voltage lines are not utilized. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A mobile telephone comprising
a first voltage line driven at a first phase; -
a second voltage line driven at a second phase that is different than the first phase; a first and second drive region coupled to the first voltage line; and a sense region disposed between the first and second drive regions along a first direction; wherein the first voltage line and the second voltage line cross the sense region; each of the first and second drive regions comprising a first plurality of display pixels having pixel electrodes and common electrodes, the common electrodes receiving a stimulation voltage along the first voltage line during a touch sensing mode of operation; the sense region comprising a second plurality of display pixels having pixel electrodes and common electrodes, the common electrodes of the sense region connected to touch sensing circuitry during the touch sensing mode of operation; the pixel electrodes of the first and second drive region and the sense region receiving a data signal during a display mode of operation; and wherein the first and second phases of the first and second voltage lines reduce static capacitance in the sense region as compared to a configuration in which the second voltage lines are not utilized.
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17. A mobile telephone comprising a touch screen comprising:
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a first voltage line driven at a first phase; a second voltage line driven at a second phase that is different than the first phase; a first and second drive region coupled to the first voltage line; and a sense region disposed between the first and second drive regions along a first direction; wherein the first voltage line and the second voltage line cross the sense region; each of the first and second drive regions comprising a first plurality of display pixels having pixel electrodes and common electrodes, the common electrodes receiving a stimulation voltage along the first voltage line during a touch sensing mode of operation; the sense region comprising a second plurality of display pixels having pixel electrodes and common electrodes, the common electrodes of the sense region connected to touch sensing circuitry during the touch sensing mode of operation; the pixel electrodes of the first and second drive region and the sense region receiving a data signal during a display mode of operation; and wherein the first and second phases of the first and second voltage lines reduce static capacitance in the sense region as compared to a configuration in which the second voltage lines are not utilized.
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Specification