Touch-based device with interlaced electrode grids
A touch screen display includes a plurality of sets of electrodes facilitating touch sense functionality based on electrode signals having a drive signal component and a receive signal component. Each set of electrodes includes a corresponding proper subset of non-neighboring ones of a plurality of row electrodes and a corresponding proper subset of non-neighboring ones of a plurality of column electrodes. The row electrodes and the column electrodes form a plurality of cross points. The touch screen display further includes a plurality of sets of drive-sense circuits, where each set of drive-sense circuits is operable to generate a proper subset of a plurality of sensed signals indicating variations in capacitance associated with a proper subset of the plurality of cross points formed by a corresponding set of electrodes. The touch screen display further includes a processing module operable to process the plurality of sensed signals identify a user interaction.
1. A touch screen display comprises:
a display configured to render frames of data into visible images;
a plurality of sets of electrodes integrated into the display to facilitate touch sense functionality based on electrode signals having a drive signal component and a receive signal component, wherein each set of electrodes of the plurality of sets of electrodes includes a corresponding proper subset of non-neighboring ones of a plurality of row electrodes and a corresponding proper subset of non-neighboring ones of a plurality of column electrodes, wherein the plurality of row electrodes is separated from the plurality of column electrodes by a dielectric material, and wherein the plurality of row electrodes and the plurality of column electrodes form a plurality of cross points;
a plurality of sets of drive-sense circuits, wherein each set of drive-sense circuits of the plurality of sets of drive-sense circuits includes a plurality of drive-sense circuits coupled to electrodes of a corresponding set of electrodes of the plurality of sets of electrodes, and wherein each set of drive-sense circuits is operable to generate a proper subset of a plurality of sensed signals indicating variations in capacitance associated with a proper subset of the plurality of cross points formed by the corresponding set of electrodes; and
a processing module that includes at least one memory that stores operational instructions and at least one processing circuit that executes the operational instructions to perform operations that include:
receiving the plurality of sensed signals from the plurality of sets of drive-sense circuits; and
processing the plurality of sensed signals identify a user interaction in proximity to the touch screen display;
wherein a plurality of proper subsets of the plurality of sensed signals indicate variations in capacitance associated with a corresponding proper subset of a plurality of proper subsets of the plurality of cross points, wherein each of the plurality of proper subsets of the plurality of cross points include a same number of cross points, and wherein the plurality of proper subsets of the plurality of cross points are mutually exclusive with respect to the plurality of cross points.
2. The touch screen display of claim 1 , wherein each of the plurality of drive-sense circuits includes a first conversion circuit and a second conversion circuit, and wherein, when a drive-sense circuit of the plurality of sets of drive-sense circuits is enabled to monitor a corresponding electrode of the plurality of electrodes, the first conversion circuit is configured to convert the receive signal component into a sensed signal of the plurality of sensed signals and the second conversion circuit is configured to generate the drive signal component from the sensed signal of the plurality of sensed signals.
3. The touch screen display of claim 1 , wherein a plurality of proper subsets of the plurality of row electrodes corresponding to the plurality of sets of electrodes each include a first same number of row electrodes, wherein the plurality of proper subsets of the plurality of row electrodes are mutually exclusive and collectively exhaustive with respect to the plurality of row electrodes;
wherein a plurality of proper subsets of the plurality of column electrodes corresponding to the plurality of sets of electrodes each include a second same number of column electrodes; and wherein the plurality of proper subsets of the plurality of column electrodes are mutually exclusive and collectively exhaustive with respect to the plurality of column electrodes.
4. The touch screen display of claim 1 , wherein the plurality of row electrodes are physically arranged in accordance with a first linear ordering, wherein the plurality of column electrodes are physically arranged in accordance with a second linear ordering, wherein an ordering multiple is equal to a number of sets of electrodes included in the plurality of sets of electrodes, wherein the plurality of row electrodes are ordered in the first linear ordering based on spacing row electrodes in each given proper subset of the plurality of row electrodes apart by the ordering multiple in the first linear ordering, and wherein the plurality of column electrodes are ordered in the second linear ordering based on spacing column electrodes in each given proper subset of the plurality of column electrodes apart by the ordering multiple in the second linear ordering.
5. The touch screen display of claim 1 , wherein each set of electrodes of the plurality of sets of electrodes forms a corresponding electrode grid of a set of electrode grids, wherein each electrode grid is in accordance with a common uniform row spacing and a common uniform column spacing, wherein the corresponding proper subset of the plurality of row electrodes belonging to the each set of electrodes form rows of the electrode grid is in accordance with the common uniform row spacing, and wherein the corresponding proper subset of the plurality of column electrodes belonging to the each set of electrodes form columns of the electrode grid is in accordance with the common uniform column spacing.
6. The touch screen display of claim 5 , wherein the common uniform row spacing is equal to the common uniform column spacing.
7. The touch screen display of claim 5 , wherein each electrode grid of the set of electrode grids is bounded via a corresponding one of a set of bounding areas projected upon a plane parallel with the display, wherein each corresponding one of a set of bounding areas is based on ones of the plurality of cross points forming a cross point perimeter of the each electrode grid, wherein each electrode grid of the set of electrode grids is physically integrated into the display having a location of the corresponding one of the set of bounding areas in accordance with one of a set of different offset locations on the plane, and wherein every one of the set of bounding areas overlaps with all other ones of the set of bounding areas on the plane.
8. The touch screen display of claim 1 , wherein a set difference between the plurality of cross points and a set union of the plurality of proper subsets of the plurality of cross points is non-null.
9. The touch screen display of claim 1 , wherein a nearest neighboring cross point from any given cross point included in a set union of the plurality of proper subsets of the plurality of cross points is included in a proper subset of the plurality of proper subsets of the plurality of cross points that is different from another proper subset of the plurality of proper subsets that includes the given cross point.
10. The touch screen display of claim 9 , wherein the nearest neighboring cross point from the any given cross point has a first distance from the any given cross point, and wherein a nearest cross point from the any given cross point that is also in the same proper subset of the plurality of proper subsets of the plurality of cross points with the any given cross point has a second distance from the any given cross point that is greater than the first distance.
11. The touch screen display of claim 10 , wherein a plurality of segments formed by all pairs of cross points separated by the first distance each fall upon one of a set of parallel lines upon a plane parallel with the display, wherein the set of parallel lines are not parallel with the plurality of row electrodes, and wherein the set of parallel lines are not parallel with the plurality of column electrodes.
12. The touch screen display of claim 1 , wherein a first proper subset of sets of drive-sense circuits in the plurality of sets of drive-sense circuits generate corresponding proper subsets of the plurality of sensed signals in a first temporal period.
13. The touch screen of display claim 12 , wherein the display is configured to render frames of data into visible images in accordance with a frame rate, and wherein the first temporal period is a period corresponding to frame rate.
14. The touch screen of display claim 12 , wherein a second proper subset of the sets of drive-sense circuits in the plurality of sets of drive-sense circuits generate corresponding proper subsets of the plurality of sensed signals in a second temporal period after the first temporal period, and wherein the second proper subset of the set of drive-sense circuits in the plurality of sets of drive-sense circuits and the first proper subset of the set of drive-sense circuits in the plurality of sets of drive-sense circuits have a non-null set difference.
15. The touch screen display of claim 1 , wherein each of the electrodes comprise:
a transparent conductive trace placed in a layer of the touch screen display, wherein the transparent conduction trace is constructed of one or more of: Indium Tin Oxide (ITO), Graphene, Carbon Nanotubes, Thin Metal Films, Silver Nanowires Hybrid Materials, Aluminum-doped Zinc Oxide (AZO), Amorphous Indium-Zinc Oxide, Gallium-doped Zinc Oxide (GZO), or poly(3,4-ethylenedioxythiophene) (PEDOT).
16. A method for use in a touch screen display comprises:
providing a display configured to render frames of data into visible images;
providing a plurality of sets of electrodes integrated into the display to facilitate touch sense functionality based on electrode signals having a drive signal component and a receive signal component, wherein each set of electrodes of the plurality of sets of electrodes includes a corresponding proper subset of a plurality of row electrodes and a corresponding proper subset of a plurality of column electrodes, wherein the plurality of row electrodes is separated from each the plurality of column electrodes by a dielectric material, and wherein the plurality of row electrodes and the plurality of column electrodes form a plurality of cross points;
generating, via each of a plurality of sets of drive-sense circuits, a corresponding proper subset of a plurality of sensed signals, wherein each set of drive-sense circuits of the plurality of sets of drive-sense circuits includes a plurality of drive-sense circuits coupled to electrodes of a corresponding set of electrodes of the plurality of sets of electrodes, and wherein each set of drive-sense circuits is operable to generate a proper subset of the plurality of sensed signals indicating variations in capacitance associated with a proper subset of the plurality of cross points formed by the corresponding set of electrodes; and
processing the plurality of sensed signals identify a user interaction in proximity to the touch screen display;
wherein each set of electrodes of the plurality of sets of electrodes forms a corresponding electrode grid of a set of electrode grids, wherein each electrode grid is in accordance with a common uniform row spacing and a common uniform column spacing, wherein the corresponding proper subset of the plurality of row electrodes belonging to the each set of electrodes form rows of the electrode grid is in accordance with the common uniform row spacing, and wherein the corresponding proper subset of the plurality of column electrodes belonging to the each set of electrodes form columns of the electrode grid is in accordance with the common uniform column spacing.
17. The method of claim 16 , wherein each of the plurality of drive-sense circuits includes a first conversion circuit and a second conversion circuit, and wherein, when a drive-sense circuit of the plurality of drive-sense circuits is enabled to monitor a corresponding electrode of the plurality of sets of electrodes, the first conversion circuit is configured to convert the receive signal component into a sensed signal of the plurality of sensed signals and the second conversion circuit is configured to generate the drive signal component from the sensed signal of the plurality of sensed signals.
18. The method of claim 16 , wherein a plurality of proper subsets of the plurality of row electrodes corresponding to the plurality of sets of electrodes each include a first same number of row electrodes, wherein the plurality of proper subsets of the plurality of row electrodes are mutually exclusive and collectively exhaustive with respect to the plurality of row electrodes;
wherein a plurality of proper subsets of the plurality of column electrodes corresponding to the plurality of sets of electrodes each include a second same number of column electrodes; and wherein the plurality of proper subsets of the plurality of column electrodes are mutually exclusive and collectively exhaustive with respect to the plurality of column electrodes.
19. A touch-based device comprises:
a plurality of sets of electrodes facilitating touch sense functionality based on electrode signals having a drive signal component and a receive signal component, wherein each set of electrodes of the plurality of sets of electrodes includes a corresponding proper subset of non-neighboring ones of a plurality of row electrodes and a corresponding proper subset of non-neighboring ones of a plurality of column electrodes, wherein the plurality of row electrodes is separated from the plurality of column electrodes by a dielectric material, and wherein the plurality of row electrodes and the plurality of column electrodes form a plurality of cross points;
a plurality of sets of drive-sense circuits, wherein each set of drive-sense circuits of the plurality of sets of drive-sense circuits includes a plurality of drive-sense circuits coupled to electrodes of a corresponding set of electrodes of the plurality of sets of electrodes, and wherein each set of drive-sense circuits is operable to generate a proper subset of a plurality of sensed signals indicating variations in capacitance associated with a proper subset of the plurality of cross points formed by the corresponding set of electrodes; and
a processing module that includes at least one memory that stores operational instructions and at least one processing circuit that executes the operational instructions to perform operations that include:
receiving the plurality of sensed signals from the plurality of sets of drive-sense circuits; and
processing the plurality of sensed signals identify a user interaction in proximity to the touch-based device;
wherein each of the plurality of drive-sense circuits includes a first conversion circuit and a second conversion circuit, and wherein, when a drive-sense circuit of the plurality of drive-sense circuits is enabled to monitor a corresponding electrode of the plurality of sets of electrodes, the first conversion circuit is configured to convert the receive signal component into a sensed signal of the plurality of sensed signals and the second conversion circuit is configured to generate the drive signal component from the sensed signal of the plurality of sensed signals.