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US 2013/0278557 A1Published application
Touch sensor panels with reduced static capacitance
AssigneeApple Inc.
InventorsSteven Porter HOTELLING, Marduke Yousefpor
Life of this patent
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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.
Claims29
A touch sensitive panel comprising:
- a plurality of pixels;
- a plurality of first voltage lines that are driven at a first phase;
- a plurality of second voltage lines that are driven at a second phase that is different than the first phase;
- a plurality of drive regions comprising some of the plurality of pixels arranged in a matrix, each drive region coupled at least to one of the plurality of first voltage lines;
- at least one sense region comprising others of the plurality of pixels, arranged in a matrix and disposed between at least a first and a second drive regions of the plurality of drive regions, the plurality of first voltage lines and the plurality of second voltage lines crossing the at least one sense region and electrically isolated therefrom;
- and
- wherein the first and second phases of the first and second voltage lines reduce static capacitance in the at least one sense region.
4 more elements
A method of reducing static capacitance in a touch panel comprising:
- providing a plurality of pixels;
- driving a plurality of first voltage lines at a first phase;
- driving a plurality of second voltage lines at a second phase that is different than the first phase, wherein the first voltage lines and the second voltage lines cross-under a sense region;
- coupling at least one of the plurality of first voltage lines to a plurality of drive regions comprising some of the plurality of pixels arranged in a matrix;
- disposing at least one sense region, comprising others of the plurality of pixels, arranged in a matrix, between at least a first and a second drive regions of the plurality of drive regions, the plurality of first voltage lines and the plurality of second voltage lines crossing the at least one sense region and electrically isolated therefrom;
- and
- wherein the first and second phases of the first and second voltage lines reduce static capacitance in the at least one sense region.
4 more elements
A method of reducing the static capacitance in a sense region of a touch panel comprising:
- providing a plurality of pixels;
- providing a plurality of first voltage lines that are driven at a first phase;
- providing a first and second drive region, each comprising a plurality of capacitive elements of pixels arranged in a matrix and connected to the first voltage lines;
- providing a sense region comprising a plurality of capacitive elements of pixels arranged in a matrix;
- disposing the sense region between the first and second drive regions;
- disposing the plurality of first voltage lines such that they cross-under the sense region and are electrically isolated therefrom;
- selecting a number of second voltage lines to be driven at a second phase that is different than the first phase;
- and
- providing the selected number of second voltage lines that cross-under the sense region and are electrically isolated therefrom;
- wherein the first and second phases of the first and selected number of second voltage lines respectively reduce static capacitance in the sense region.
7 more elements
A touch screen including display pixels with capacitive elements, the touch screen comprising:
- a plurality of pixels;
- a plurality of first voltage lines that are driven at a first phase;
- a plurality of second voltage lines that are driven at a second phase that is different than the first phase;
- a drive region comprising a plurality of capacitive elements of pixels connected to the first voltage lines;
- a sense region, wherein the first voltage lines and the second voltage lines cross-under the sense region;
- and
- wherein the first and second phases of the first and second voltage lines respectively reduce static capacitance in the sense region.
4 more elements
A digital media player comprising a touch screen comprising:
- a plurality of pixels each have capacitive elements;
- a plurality of first voltage lines that are driven at a first phase;
- a plurality of second voltage lines that are driven at a second phase that is different than the first phase;
- a plurality of drive regions each comprising a some of the plurality of capacitive elements of pixels arranged in a matrix and connected to the first voltage lines;
- and
- a sense region comprising others of the plurality of capacitive elements of pixels arranged in a matrix and disposed between two of the plurality of drive regions, wherein the first voltage lines and the second voltage lines cross-under the sense region;
- and
- wherein the first and second phases of the first and second voltage lines respectively reduce static capacitance in the sense region.
5 more elements
A mobile telephone comprising a touch screen comprising:
- a plurality of pixels each have capacitive elements;
- a plurality of first voltage lines that are driven at a first phase;
- a plurality of second voltage lines that are driven at a second phase that is different than the first phase;
- a plurality of drive regions each comprising a some of the plurality of capacitive elements of pixels arranged in a matrix and connected to the first voltage lines;
- and
- a sense region comprising others of the plurality of capacitive elements of pixels arranged in a matrix and disposed between two of the plurality of drive regions, wherein the first voltage lines and the second voltage lines cross-under the sense region;
- and
- wherein the first and second phases of the first and second voltage lines respectively reduce static capacitance in the sense region.
5 more elements
A personal computer comprising a touch screen comprising:
- a plurality of pixels each have capacitive elements;
- a plurality of first voltage lines that are driven at a first phase;
- a plurality of second voltage lines that are driven at a second phase that is different than the first phase;
- a plurality of drive regions each comprising a some of the plurality of capacitive elements of pixels arranged in a matrix and connected to the first voltage lines;
- a sense region comprising others of the plurality of capacitive elements of pixels arranged in a matrix and disposed between two of the plurality of drive regions, wherein the first voltage lines and the second voltage lines cross-under the sense region;
- and
- wherein the first and second phases of the first and second voltage lines respectively reduce static capacitance in the sense region.
4 more elements
Dependencies are inferred from the claim text.