# US 11,907,480 B2 · Touch device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,907,480 B2 - Document ID: US11907480B2 - Status: Granted - Kind: B2 - Application number: 18/342,674 - Filed: 2023-06-27 - Published: 2023-10-26 - Granted: 2024-02-20 - Earliest claimed: 2016-12-07 - Assignees: FlatFrog Laboratories AB - Applicants: Flatfrog Laboratories AB - Inventors: Aleksander Kocovski; Hakan Bergstrom; Jens Thorvinger - Web page: https://patentgrep.com/patent/US11907480B2 ## CPC - G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen} - G06F 1/16: Constructional details or arrangements - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means - G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract An assembly for holding and controlling curvature of a glass plate for an optical touch sensitive system is described. The assembly comprising a first frame element extending in a first plane and configured to extend at least partially around a panel; at least one second frame element extending in a second plane and forming a support portion for the plate, and at least one spacing element positioned at least partially between the support portion and the first frame element. The spacing element us configured to control a curvature of the first frame element and wherein the at least one second frame element is configured to engage the plate at the support portion, is attached to the first frame element, and is tiltable, by controlling the curvature of the first frame element with said spacing element, to control a curvature of the plate. ## Claims ### Claim 1 A touch sensing apparatus comprising: a display panel; a plate including a top surface that comprises a touch surface; one or more emitters arranged adjacent to a periphery of the plate and configured to emit light across the touch surface of the plate; a set of detectors arranged adjacent to the periphery of the plate and configured to receive light from the one or more emitters; and a frame assembly configured to support the display panel and the plate, wherein the touch surface is curved along a first axis, wherein the first axis is substantially parallel to a propagation direction of the emitted light across the touch surface, wherein at least one edge of the top surface is curved, and wherein the plate has a first curvature in the touch surface when not installed in the frame assembly, and wherein the plate has a second curvature different from the first curvature when the plate is installed in the frame assembly. ### Claim 2 (depends on 1) The touch sensing apparatus according to claim 1, wherein the first axis is parallel to the at least one edge of the top surface. ### Claim 3 (depends on 1) The touch sensing apparatus according to claim 1, wherein the touch surface is curved along a second axis. ### Claim 4 (depends on 3) The touch sensing apparatus according to claim 3, wherein the second axis is substantially perpendicular to the first axis and in the same plane as the first axis. ### Claim 5 (depends on 1) The touch sensing apparatus according to claim 1, wherein an opposing edge, opposed to the at least one edge of the top surface, is curved. ### Claim 6 (depends on 1) The touch sensing apparatus according to claim 1, wherein a diagonal dimension of the plate is at least 55 inches. ### Claim 7 (depends on 1) The touch sensing apparatus according to claim 1, wherein the frame assembly is configured to control a curvature of the plate. ### Claim 8 A touch sensing apparatus comprising: a display panel; a plate including a top surface that comprises a touch surface; one or more emitters arranged adjacent to a periphery of the plate and configured to emit light across the touch surface of the plate; a set of detectors arranged adjacent to the periphery of the plate and configured to receive light from the one or more emitters; and a frame assembly configured to support the display panel and the plate, wherein at least one edge of the top surface is curved, wherein a diagonal dimension of the plate is at least 55 inches, and wherein the plate has a first curvature in the touch surface when not installed in the frame assembly, and wherein the plate has a second curvature different from the first curvature when the plate is installed in the frame assembly. ### Claim 9 (depends on 8) The touch sensing apparatus according to claim 8, wherein the frame assembly is configured to control a curvature of the plate. ### Claim 10 (depends on 8) The touch sensing apparatus according to claim 8, wherein the touch surface is curved along a first axis, and wherein the first axis is substantially parallel to a propagation direction of the emitted light across the touch surface. ### Claim 11 (depends on 8) The touch sensing apparatus according to claim 8, wherein the first axis is parallel to the at least one edge of the top surface. ### Claim 12 (depends on 8) The touch sensing apparatus according to claim 8, wherein the touch surface is curved along a second axis. ### Claim 13 (depends on 12) The touch sensing apparatus according to claim 12, wherein the second axis is substantially perpendicular to the first axis and in the same plane as the first axis. ### Claim 14 (depends on 8) The touch sensing apparatus according to claim 8, wherein an opposing edge, opposed to the at least one edge of the top surface, is curved. ### Claim 15 A touch sensing apparatus comprising: a display panel; a plate including a top surface that comprises a touch surface; one or more emitters arranged adjacent to a periphery of the plate and configured to emit light across the touch surface of the plate; a set of detectors arranged adjacent to the periphery of the plate and configured to receive light from the one or more emitters; and a frame assembly configured to support the display panel and the plate and to control a curvature of the plate, wherein the plate has a first curvature in the touch surface when not installed in the frame assembly, and wherein the plate has a second curvature different from the first curvature when the plate is installed in the frame assembly, and wherein at least one edge of the top surface is curved. ### Claim 16 (depends on 15) The touch sensing apparatus according to claim 15, wherein a diagonal dimension of the plate is at least 55 inches. ### Claim 17 (depends on 15) The touch sensing apparatus according to claim 15, wherein the second curvature is parabolic, and wherein the first curvature is concave. ### Claim 18 (depends on 15) The touch sensing apparatus according to claim 15, wherein the second curvature is along a first axis and along a second axis perpendicular to the first axis.