# US 11,897,239 B2 · Laminating device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,239 B2 - Document ID: US11897239B2 - Status: Granted - Kind: B2 - Application number: 17/425,950 - Filed: 2021-01-07 - Published: 2022-05-26 - Granted: 2024-02-13 - Earliest claimed: 2020-01-17 - Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Xingguo Liu; Wei Qing; Shaokui Liu; Zhihui Wang; Zuquan Chen; Wei Zeng; Danping Shen; Jia Deng; Jialin Wang - Web page: https://patentgrep.com/patent/US11897239B2 ## CPC - B32B 38/1866: {conforming the layers or laminate to a convex or concave profile} - B32B 37/0046: {characterised by constructional aspects of the apparatus} - B32B 37/10: characterised by the pressing technique, e.g. using action of vacuum or fluid pressure - H10P 72/00: Handling or holding of wafers, substrates or devices during manufacture or treatment thereof - B32B 37/003: {to avoid air inclusion} - B32B 2383/00: Polysiloxanes - B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays - B32B 2457/206: Organic displays, e.g. OLED - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10 - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS ## Abstract A lamination device includes: an elastic lamination seat, including a deformation bearing portion, the deformation bearing portion including a bearing surface for bearing a to-be-laminated flexible display panel, and the bearing surface being configured as a curved surface protruding towards the cover plate; an auxiliary bearing film, configured to pre-bend and fix the to-be-laminated flexible display panel onto the bearing surface when the elastic lamination seat is in a natural state; and a driving mechanism, connected to the elastic lamination seat and configured to drive the elastic lamination seat to move towards or away from the cover plate, wherein when the driving mechanism drives the elastic lamination seat to move towards the cover plate, the elastic lamination seat is squeezed to produce elastic deformation and the bearing surface gradually laminates the flexible display panel onto the cover plate from the middle to two sides. ## Claims ### Claim 1 A lamination device, configured to laminate a cover plate onto a flexible display panel, comprising: an elastic lamination seat, comprising a deformation bearing portion, the deformation bearing portion comprising a bearing surface for bearing a to-be-laminated flexible display panel, and the bearing surface being configured as a curved surface protruding toward the cover plate; an auxiliary bearing film configured to pre-bend and fix the to-be-laminated flexible display panel on the bearing surface when the elastic lamination seat is in a natural state; and, a driving mechanism connected to the elastic lamination seat and configured to drive the elastic lamination seat to move toward or away from the cover plate, wherein when the driving mechanism drives the elastic lamination seat to move toward the cover plate, the elastic lamination seat is squeezed to produce elastic deformation and the bearing surface gradually laminates the flexible display panel onto the cover plate from a middle to two sides; wherein the bearing surface comprises second cambered surfaces at two ends, a first cambered surface between the two second cambered surfaces, and a third cambered surface; the third cambered surface is tangentially connected with ends of the second cambered surfaces away from the first cambered surface, the third cambered surface is recessed toward the elastic lamination seat; the flexible display panel after being laminated onto the cover plate comprises curved sections at two ends and a flat section between the two curved sections; when the driving mechanism applies an acting force to the elastic lamination seat, deformation of the third cambered surface applies an acting force to the second cambered surface along a tangential direction of a junction of the third cambered surface and the second cambered surface so as to promote the second cambered surface to be filled to the curved section of the flexible display panel and laminate the curved section with a cambered section of the cover plate; wherein the elastic lamination seat further comprises a deformation supporting portion, the deformation supporting portion comprises a supporting surface opposite to the bearing surface and flat side surfaces located at two ends of the supporting surface, the supporting surface and each of the flat side surfaces are connected by a transitional surface, and the transitional surface is configured as a stepped surface; wherein a maximum distance between a circle center of the second cambered surface and the first cambered surface in a third direction is H2, a distance between an end of the curved section away from the flat section and the flat section in the third direction is H1, and H2 is less than or equal to H1, wherein the third direction is a direction parallel to a symmetry axis of a cross section of the elastic lamination seat; wherein the lamination device comprises stop blocks located at two sides of the elastic lamination seat in a second direction, each of the stop blocks is movable, each of the stop blocks can move along the second direction and can move along the third direction, before the driving mechanism drives the elastic lamination seat to move towards the cover plate, each of the stop blocks moves to a position corresponding to a position of the third cambered surface. ### Claim 2 (depends on 1) The lamination device according to claim 1, wherein a cross-sectional shape of the elastic lamination seat is a symmetrical shape, the second cambered surface is tangentially connected to the first cambered surface, and a length of the first cambered surface is equal to a length of the flat section of the flexible display panel. ### Claim 3 (depends on 2) The lamination device according to claim 2, wherein a radius of the second cambered surface is less than or equal to a minimum radius of the curved section of the flexible display panel. ### Claim 4 (depends on 2) The lamination device according to claim 2, wherein a width in a first direction between two ends on a side, facing the elastic lamination seat, of the flexible display panel after being laminated onto the cover plate is W, a width of the bearing surface in the first direction is W1, and W1 is less than W, wherein the first direction is a direction perpendicular to a symmetry axis of a cross section of the elastic lamination seat. ### Claim 5 (depends on 2) The lamination device according to claim 2, wherein an angle between a tangent at a junction of the second cambered surface and the third cambered surface and a first direction is α2, and an angle between a tangent at an endpoint of one end, away from the flat section, of the curved section of the flexible display panel and the first direction is α1, α2≥α1, and the first direction is a direction perpendicular to a symmetry axis of a cross section of the elastic lamination seat. ### Claim 6 (depends on 5) The lamination device according to claim 5, positions of the stop blocks corresponding to a position of the third cambered surface in a direction perpendicular to the flat section, each of the stop blocks having a barrier wall configured to be in contact with a side wall of the elastic lamination seat, the barrier wall preventing the deformation of the elastic lamination seat in an extending direction of the elastic lamination seat when the driving mechanism drives the elastic lamination seat to move toward the cover plate, wherein the second direction is a direction parallel to the extending direction of the elastic lamination seat. ### Claim 7 (depends on 6) The lamination device according to claim 6, wherein the barrier wall is configured as a cambered surface protruding toward the elastic lamination seat. ### Claim 8 (depends on 5) The lamination device according to claim 5, wherein in the second direction, a radius of the third cambered surface gradually increases from the middle of the elastic lamination seat toward two ends, and the second direction is a direction parallel to an extending direction of the elastic lamination seat. ### Claim 9 (depends on 1) The lamination device according to claim 1, wherein the flat side surfaces are in smoothly transitional connection with the deformation bearing portion. ### Claim 10 (depends on 9) The lamination device according to claim 9, wherein a height of the elastic lamination seat in a third direction ranges from 30 mm to 40 mm, and the third direction is a direction parallel to a normal line of the supporting surface. ### Claim 11 (depends on 9) The lamination device according to claim 9, further comprising a base, the base being arranged between the supporting surface and the driving mechanism, the driving mechanism driving the elastic lamination seat to move through the base, a side of the base facing the supporting surface being provided with a groove matching the deformation supporting portion, the supporting surface being embedded in the groove. ### Claim 12 (depends on 1) The lamination device according to claim 1, wherein a material of the elastic lamination seat comprises silicone, and a hardness of the elastic lamination seat ranges from 20A to 40A. ### Claim 13 (depends on 2) The lamination device according to claim 2, wherein an angle of the curved section of the flexible display panel after being laminated onto the cover plate ranges from 90° to 150° . ### Claim 14 (depends on 2) The lamination device according to claim 2, wherein the flat side surfaces are in smoothly transitional connection with the deformation bearing portion. ### Claim 15 (depends on 14) The lamination device according to claim 14, wherein a height of the elastic lamination seat in a third direction ranges from 30 mm to 40 mm, and the third direction is a direction parallel to a normal line of the supporting surface. ### Claim 16 (depends on 14) The lamination device according to claim 14, further comprising a base, the base being arranged between the supporting surface and the driving mechanism, the driving mechanism driving the elastic lamination seat to move through the base, a side of the base facing the supporting surface being provided with a groove matching the deformation supporting portion, the supporting surface being embedded in the groove. ### Claim 17 (depends on 3) The lamination device according to claim 3, wherein the elastic lamination seat further comprises a deformation supporting portion, the deformation supporting portion comprises a supporting surface opposite to the bearing surface and flat side surfaces located at two ends of the supporting surface, and the flat side surfaces are in smoothly transitional connection with the deformation bearing portion.