# US 12,181,684 B2 · Device for precisely aligning a projection module relative to a projection surface, method for producing the device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,181,684 B2 - Document ID: US12181684B2 - Status: Granted - Kind: B2 - Application number: 18/496,320 - Filed: 2023-10-27 - Published: 2024-08-22 - Granted: 2024-12-31 - Earliest claimed: 2023-02-21 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Florian Grabmaier; Joerg Carls - Web page: https://patentgrep.com/patent/US12181684B2 ## CPC - G02B 27/0176: {characterised by mechanical features} - G02B 27/62: Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A device for precisely aligning a projection module relative to a projection surface. The device includes a bracket and a front. The bracket is designed to support the projection module. The front is designed to support the projection surface. The device further includes a compensating element for precisely aligning the projection module relative to the projection surface. The compensating element produces a firmly bonded connection between the bracket and the front or between the bracket and the projection module. A method for producing the device is also described. ## Claims ### Claim 1 A device for precisely aligning a projection module relative to a projection surface, comprising: a bracket and a front, wherein the bracket is configured to support the projection module, and the front is configured to support the projection surface or an eyeglass lens which includes the projection surface; and a compensating element configured to precisely align the projection module relative to the projection surface, the compensating element producing a firmly bonded connection between the bracket and the front or between the bracket and the projection module; wherein the compensating element connects a head to a cylindrical sleeve. ### Claim 2 (depends on 1) The device as recited in claim 1, wherein the bracket is a temple, and wherein the front is an eyeglass front. ### Claim 3 (depends on 1) The device according to claim 1, wherein, on a first side of the compensating element, the compensating element has a contact surface to the bracket, wherein, on a second side opposite to the first side or on a second side of the compensating element adjacent to the first side, the compensating element has a contact surface to the front or to the projection module, wherein the compensating element is of varying thickness between: (i) the contact surface to the bracket, and (ii) the contact surface to the front or to the projection module, and wherein the compensating element is wedge-shaped. ### Claim 4 (depends on 3) The device according to claim 3, wherein the compensating element is in the shape of a one-dimensional or two-dimensional wedge. ### Claim 5 (depends on 1) The device according to claim 1, wherein the compensating element is wedge-shaped with a blunt side which substantially has a thickness of 0.3 mm or more than 0.3 mm, at one end of the blunt side or at both ends of the blunt side. ### Claim 6 (depends on 1) The device according to claim 1, wherein the compensating element is wedge-shaped, with an edge which substantially has a thickness of 0.3 mm or less than 0.3 mm, at one end of the edge or at both ends of the edge. ### Claim 7 (depends on 1) The device according to claim 1, wherein: (i) the bracket or the front or the projection module has a receptacle having a surface for contact to a contact surface of the compensating element, wherein, laterally to the surface, (ii) the receptacle does not have a stop for limiting a lateral movement of the contact surface, or has a gap between a stop, arranged laterally to the surface, for limiting a lateral movement of the contact surface and the compensating element. ### Claim 8 (depends on 1) The device according to claim 1, wherein: (i) the compensating element includes light-cured or dual-cured adhesive, or (ii) consists of light-cured or dual-cured adhesive. ### Claim 9 (depends on 1) The device according to claim 1, and wherein: (i) the head supports the bracket and the sleeve supports the projection module or the front, or (ii) the sleeve supports the bracket and the head supports the projection module or the front. ### Claim 10 (depends on 1) The device according to claim 1, wherein the device includes two compensating elements. ### Claim 11 (depends on 10) The device according to claim 10, wherein the two compensating elements are arranged, spaced apart from one another, between the bracket and the projection module. ### Claim 12 (depends on 10) The device according to claim 10, wherein the device includes two brackets arranged on opposite sides of the front, wherein one of the two compensating elements is arranged between one of the two brackets and the front, wherein one of the two compensating elements is arranged between the other of the two brackets and the front. ### Claim 13 A method for producing a device for precisely aligning a projection module relative to a projection surface, the method comprising: arranging a compensating element for a firmly bonded connection between: (i) a bracket, and (ii) a front or a projection module; arranging the projection module on the bracket; arranging the projection surface on the front; aligning the bracket or the projection module in a position relative to the front or to the projection surface; and holding the position at least temporarily while the firmly bonded connection is being produced; wherein the compensating element connects a head to a cylindrical sleeve. ### Claim 14 (depends on 13) The method according to claim 13, wherein: (i) the head supports the bracket and the sleeve supports the projection module or the front, or (ii) the sleeve supports the bracket and the head supports the projection module or the front. ### Claim 15 (depends on 13) The method according to claim 13, wherein the head supports the bracket and the sleeve supports the projection module or the front. ### Claim 16 (depends on 13) The method according to claim 13, wherein the sleeve supports the bracket and the head supports the projection module or the front. ### Claim 17 (depends on 1) The device according to claim 1, wherein the head supports the bracket and the sleeve supports the projection module or the front. ### Claim 18 (depends on 1) The device according to claim 1, wherein the sleeve supports the bracket and the head supports the projection module or the front.