# US 2014/0192007 A1 · Capacitive touch surface in close proximity to display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192007 A1 - Document ID: US20140192007A1 - Status: Published application - Kind: A1 - Application number: 13/735,958 - Filed: 2013-01-07 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: Microsoft Corporation - Applicants: Microsoft Corporation - Inventors: Jonathan Westhues; Sean Donnelly; Jason Wilson - Web page: https://patentgrep.com/patent/US20140192007A1 ## CPC - G06F 3/047: using sets of wires, e.g. crossed wires - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds - G06F 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate - G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract To address the above issues, a display device with a capacitive touch screen display having a touch surface in close proximity to a display stack is provided. The display may include a touch sheet with a top surface, a touch sensor having a matrix of capacitors formed of electrodes positioned below the touch sheet and configured to exhibit a change in capacitance of at least one of the capacitors in response to a touch on the top surface by a digit or stylus of a user, a display stack positioned below the matrix of capacitors and configured to emit light through a top surface of the display stack to travel in a light emitting direction through the matrix of capacitors and the touch sheet. A distance between the top surface of the touch sheet and the top surface of the display stack is between about 225 and 1500 micrometers. ## Claims ### Claim 1 A capacitive touch sensitive display device, comprising: a touch sheet with a top surface; a touch sensor having a matrix of capacitors formed of electrodes including metallic conductors positioned below the touch sheet and configured to exhibit a change in capacitance of at least one of the capacitors in response to a touch on the top surface by a digit or stylus of a user; a display stack positioned below the matrix of capacitors and configured to emit light through a top surface of the display stack, to travel in a light emitting direction through the touch sensor and the touch sheet; wherein a distance between the top surface of the touch sheet and the top surface of the display stack is between about 225 and 1500 micrometers. ### Claim 2 (depends on 1) The capacitive touch sensitive display device of claim 1, wherein the touch sheet is between about 50 and 500 micrometers in thickness. ### Claim 3 (depends on 1) The capacitive touch sensitive display device of claim 1, further comprising: a first optically clear adhesive layer joining a bottom surface of the touch sensor to the top surface of the display stack; wherein the first optically clear adhesive layer is between about 25 and 200 micrometers in thickness. ### Claim 4 (depends on 3) The capacitive touch sensitive display device of claim 3, further comprising: a second optically clear adhesive layer joining a bottom surface of the touch sheet to a top surface of the touch sensor; and wherein the second optically clear adhesive layer is between about 25 and 200 micrometers in thickness. ### Claim 5 (depends on 1) The capacitive touch sensitive display device of claim 1, wherein the touch sensor includes: a receive electrode layer including a plurality of receive electrodes arranged in columns; and a transmit electrode layer including a plurality of transmit electrodes arranged in rows; a dielectric layer positioned intermediate the receive electrode layer and transmit electrode layer; wherein a respective capacitor is formed at intersecting regions between each electrode in the receive electrode layer and each electrode in the transmit electrode layer. ### Claim 6 (depends on 5) The capacitive touch sensitive display device of claim 5, wherein: the receive electrode layer is between about 50 and 200 micrometers in thickness; and the transmit electrode layer is between about 50 and 200 micrometers in thickness. ### Claim 7 (depends on 5) The capacitive touch sensitive display device of claim 5, wherein the metallic conductors of the receive electrodes in the columns and the metallic conductors of the transmit electrodes in the rows in the matrix are spaced at sufficiently fine pitch so as to inhibit electric interference between electrodes in the display stack and electric fields emitted by the capacitors in the matrix above the top sheet, the interference being inhibited to an extent sufficient to bring a ratio in the change of capacitance due to a digit or stylus touch for a capacitor to the full capacitance for the capacitor to between 1:10 and 8:10. ### Claim 8 (depends on 7) The capacitive touch sensitive display device of claim 7, wherein the pitch of the metallic conductors of the receive electrodes and of the metallic conductors of the transmit electrodes is between 2 and 3.5 mm. ### Claim 9 (depends on 5) The capacitive touch sensitive display device of claim 5, wherein the touch sensor further includes a plurality of receive tie structures each electrically connecting a plurality of adjacent receive electrodes into a corresponding receive electrode group, and also further includes a plurality of transmit tie structures each electrically connecting a plurality of adjacent transmit electrodes into a corresponding transmit electrode group, to thereby increase the effective capacitance between an intersecting region of each receive electrode group and each transmit electrode group by at least approximately a factor of four, as compared to a structure in which the receive electrodes and transmit electrodes are untied. ### Claim 10 (depends on 1) The capacitive touch sensitive display device of claim 1, wherein the receive electrode groups and the transmit electrode groups are arranged at a pitch of between 4 and 7 mm. ### Claim 11 (depends on 1) The capacitive touch sensitive display device of claim 1, wherein the top sheet, the touch sensor, and the display stack, each have diagonal dimension that is 30 inches or greater. ### Claim 12 A method of manufacturing a capacitive touch sensitive display device, comprising: providing a display stack configured to emit light through a top surface of the display stack; layering a first optically clear adhesive layer on a top surface of the display stack; layering a touch sensor having a matrix of capacitors formed by electrodes including metallic conductors positioned above the first adhesive layer; layering a second optically clear adhesive layer above the matrix of capacitors; layering a touch sheet above the second adhesive layer; wherein a distance between a top surface of the touch sheet and the top surface of the display stack is between about 225 and 1500 micrometers; and wherein the matrix of capacitors is configured to exhibit a change in capacitance of at least one of the capacitors in response to a touch on the top surface of the touch sheet of by a digit or stylus of a user. ### Claim 13 (depends on 12) The method of manufacturing a capacitive touch sensitive display device of claim 12, wherein the touch sheet is between about 50 and 500 micrometers in thickness. ### Claim 14 (depends on 12) The method of manufacturing a capacitive touch sensitive display device of claim 12, wherein each of the first and second optically clear adhesive layers is between about 25 and 200 micrometers in thickness. ### Claim 15 (depends on 12) The method of manufacturing a capacitive touch sensitive display device of claim 12, wherein the matrix of capacitors is formed by: forming a receive electrode layer including a plurality of receive electrodes arranged in columns; and forming a transmit electrode layer including a plurality of transmit electrodes arranged in rows; forming a dielectric layer positioned intermediate the receive electrode layer and transmit electrode layer; wherein a respective capacitor is formed at intersecting regions between each electrode in the receive electrode layer and each electrode in the transmit electrode layer; wherein each of the receive electrode layer and transmit electrode layer is between about 50 and 200 micrometers in thickness. ### Claim 16 (depends on 15) The method of manufacturing a capacitive touch sensitive display device of claim 15, wherein the metallic conductors of the receive electrodes in the columns and the metallic conductors of the transmit electrodes in the rows in the matrix are spaced at sufficiently fine pitch so as to inhibit electric interference between electrodes in the display stack and electric fields emitted by the capacitors in the matrix above the top sheet, the interference being inhibited to an extent sufficient to bring the ratio in the change of capacitance due to a digit or stylus touch for a capacitor to the full capacitance for the capacitor to between 1:10 and 8:10, the pitch being 3.5 mm or finer. ### Claim 17 (depends on 12) The method of manufacturing a capacitive touch sensitive display device of claim 12, further comprising, forming the matrix to further include a plurality of receive tie structures electrically connecting a plurality of adjacent receive electrodes into a receive electrode group, and also to further include a plurality of transmit tie structures electrically connecting a plurality of adjacent transmit electrodes into a transmit electrode group, to thereby increase the effective capacitance between an intersecting region of the receive electrode group and the transmit electrode group by at least approximately a factor of four, as compared to a structure in which the receive electrodes and transmit electrodes are untied. ### Claim 18 (depends on 12) The method of manufacturing a capacitive touch sensitive display device of claim 12, wherein a distance between the top surface of the touch sheet and the top surface of the display stack is between about 300 and 1125 micrometers. ### Claim 19 (depends on 12) The method of manufacturing a capacitive touch sensitive display device of claim 12, wherein the top sheet, the matrix of capacitors, and the display stack, each have diagonal dimension that exceeds 30 inches. ### Claim 20 A capacitive touch sensitive display device, comprising: a touch sheet with a top surface, the touch sheet being about 50 and 500 micrometers in thickness; a touch sensor having a matrix of capacitors formed electrodes including metallic conductors positioned below the touch sheet and configured to exhibit a change in capacitance of at least one of the capacitors in response to a touch on the top surface by a digit or stylus of a user, the touch sensor including a receive electrode layer including a plurality of receive electrodes arranged in rows, a transmit electrode layer including a plurality of transmit electrodes arranged in columns, and a dielectric layer positioned intermediate the receive electrode layer and transmit electrode layer, wherein respective capacitors are formed at intersecting regions between each electrode in the receive electrode layer and each electrode in the transmit electrode layer; an LCD display stack positioned below the matrix of capacitors and configured to emit light through a top surface of the LCD display stack, to travel in a light emitting direction through the matrix of capacitors and the touch sheet; and a first optically clear adhesive layer joining a bottom surface of the touch sensor to the top surface of the LCD display stack, the first optically clear adhesive layer being between about 25 and 200 micrometers in thickness; wherein a distance between the top surface of the touch sheet and the top surface of the LCD display stack is between about 300 and 1125 micrometers; and wherein the metallic conductors of the receive electrodes in the columns and the metallic conductors of the transmit electrodes in the rows in the matrix are spaced at a pitch of between 2 and 3.5 mm.