# US 12,225,150 B2 · Display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,150 B2 - Document ID: US12225150B2 - Status: Granted - Kind: B2 - Application number: 17/912,916 - Filed: 2021-09-10 - Published: 2023-03-16 - Granted: 2025-02-11 - Earliest claimed: 2020-10-30 - 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: Zhihong Cui; Binfeng Feng - Web page: https://patentgrep.com/patent/US12225150B2 ## CPC - H04M 1/0266: {for a display module assembly} - G09F 9/30: in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) - H04M 1/0277: {for a printed circuit board assembly} - H05K 1/02: Details - H05K 1/147: {at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit (H05K1/148 takes precedence)} - H05K 7/20963: {Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20972 takes precedence)} - H04M 1/0216: {Foldable in one direction, i.e. using a one degree of freedom hinge} - H04M 1/0268: {including a flexible display panel} - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A display apparatus, comprising a first display panel, a first flexible circuit board, and a rigid membrane, wherein the first flexible circuit board is arranged on the back side of the first display panel; the first flexible circuit board comprises a first portion, a second portion, and a bending portion for connecting the first portion and the second portion; the first portion is electrically connected to the first display panel, and the second portion is located on the side of the first portion away from the first display panel; and the rigid membrane is located between the back side of the first display panel (101) and the bending portion, the rigid membrane supports the bending portion, the rigidity of the rigid membrane is greater than the rigidity of the first display panel (101), and the rigid membrane is used for dispersing a resilience force generated by the bending portion. ## Claims ### Claim 1 A display apparatus, comprising: a first display panel; a first flexible circuit board, provided on a back side of the first display panel, wherein the first flexible circuit board comprises a first part, a second part and a bending part connecting the first part and the second part, the first part is electrically connected to the first display panel, and the second part is located on a side of the first part away from the first display panel; and a rigid membrane, located between the back side of the first display panel and the bending part, wherein the rigid membrane supports the bending part, and a rigidity of the rigid membrane is greater than that of the first display panel, the rigid membrane is used to disperse a resilience force generated by the bending part. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein a bending axis corresponding to the bending part extends in a first direction, and an orthographic projection of the bending part on the first display panel has a first boundary and a second boundary opposite in a second direction, the second direction is perpendicular to the first direction; an orthographic projection of the rigid membrane on the first display panel has a third boundary and a fourth boundary opposite in the second direction, the third boundary is located at a side of the first boundary away from the second boundary, and the fourth boundary is located at a side of the second boundary away from the first boundary. ### Claim 3 (depends on 2) The display apparatus according to claim 2, wherein a distance between the third boundary and the first boundary in the second direction is equal to a distance between the fourth boundary and the second boundary in the second direction. ### Claim 4 (depends on 2) The display apparatus according to claim 2, wherein a distance between the third boundary and the first boundary in the second direction is greater than or equal to 1 cm, a distance between the fourth boundary and the second boundary in the second direction is greater than or equal to 1 cm. ### Claim 5 (depends on 1) The display apparatus according to claim 1, wherein a buffer part is provided in a bending space of the bending part, and an orthographic projection of the buffer part on the first display panel is located in an orthographic projection of the rigid membrane on the first display panel. ### Claim 6 (depends on 5) The display apparatus according to claim 5, wherein the buffer part is provided on a position of the bending part close to the first part, and the orthographic projection of the buffer part on the first display panel is located in a central area of the orthographic projection of the rigid membrane on the first display panel. ### Claim 7 (depends on 1) The display apparatus according to claim 1, wherein the rigid membrane has a thickness of 0.1 mm to 0.5 mm. ### Claim 8 (depends on 1) The display apparatus according to claim 1, wherein a material of the rigid membrane is polyimide or stainless steel. ### Claim 9 (depends on 1) The display apparatus according to claim 1, wherein the display apparatus further comprises a first heat dissipation film layer, provided on the back side of the first display panel, and located on a side of the rigid membrane close to the first display panel, wherein, the rigidity of the rigid membrane is greater than that of the first heat dissipation film layer. ### Claim 10 (depends on 9) The display apparatus according to claim 9, wherein an orthographic projection of the first heat dissipation film layer on the first display panel is located in the first display panel or coincides with the first display panel; an orthographic projection of the rigid membrane on the first display panel is located in the orthographic projection of the first heat dissipation film layer on the first display panel. ### Claim 11 (depends on 1) The display apparatus according to claim 1, further comprising: a first middle frame, comprising a first mounting plate and a first side plate, wherein the first mounting plate has a first mounting surface and a second mounting surface opposite to each other, the first side plate is arranged at periphery of the first mounting surface and forms a first mounting groove with the first mounting surface, wherein the first display panel, the first flexible circuit board and the rigid membrane are located in the first mounting groove, and the first part is located on a side of the second part away from the first mounting surface; a first main circuit board, provided on the first mounting surface, wherein a first connection terminal is provided on the first main circuit board, and the first connection terminal is electrically connected to the second part; a first cover plate, provided on a display side of the first display panel, wherein an edge of the first cover plate is beyond an edge of the first display panel, and a part of the first cover plate beyond the first display panel is overlapped on an end surface of the first side plate away from the first mounting surface. ### Claim 12 (depends on 11) The display apparatus according to claim 11, wherein the first mounting surface is provided with an escape groove corresponding to the bending part, and a first assembly groove is provided on the first mounting surface, wherein the first main circuit board is located in the first assembly groove, and a part of the first connection terminal extends out of the first assembly groove and is electrically connected with the second part. ### Claim 13 (depends on 12) The display apparatus according to claim 12, further comprising: a second middle frame, rotatably connected with the first middle frame, wherein the second middle frame at least comprises a second mounting plate, and the second mounting plate has a third mounting surface and a fourth mounting surface opposite to each other; a second display panel, located on a side of the second mounting surface away from the first mounting surface and located on a side of the third mounting surface away from the fourth mounting surface, wherein, relative rotation of the first middle frame and the second middle frame enables the third mounting surface to rotate to a position facing the second mounting surface, and the second display panel is able to bend at the same time. ### Claim 14 (depends on 13) The display apparatus according to claim 13, further comprising: a second main circuit board, provided on the first mounting plate or the second mounting plate, wherein a second connection terminal is provided on the second main circuit board; a second flexible circuit board, having one end electrically connected to the second connection terminal, and another end electrically connected to the second display panel; a second cover plate, provided on a side of the second display panel away from the second mounting surface and the third mounting surface, wherein the second cover plate is able to bend. ### Claim 15 (depends on 14) The display apparatus according to claim 14, wherein the first mounting surface is further provided with a second assembly groove, the first mounting plate is further provided with a through hole penetrating the first mounting surface and the second mounting surface, and the through hole communicates with the second assembly groove; the second main circuit board and the second connection terminal are located in the second assembly groove, and one end of the second flexible circuit board is electrically connected to the second connection terminal through the through hole, wherein the second main circuit board and the first main circuit board have an integrated structure or are provided independently of each other. ### Claim 16 (depends on 2) The display apparatus according to claim 2, further comprising: a first middle frame, comprising a first mounting plate and a first side plate, wherein the first mounting plate has a first mounting surface and a second mounting surface opposite to each other, the first side plate is arranged at periphery of the first mounting surface and forms a first mounting groove with the first mounting surface, wherein the first display panel, the first flexible circuit board and the rigid membrane are located in the first mounting groove, and the first part is located on a side of the second part away from the first mounting surface; a first main circuit board, provided on the first mounting surface, wherein a first connection terminal is provided on the first main circuit board, and the first connection terminal is electrically connected to the second part; a first cover plate, provided on a display side of the first display panel, wherein an edge of the first cover plate is beyond an edge of the first display panel, and a part of the first cover plate beyond the first display panel is overlapped on an end surface of the first side plate away from the first mounting surface. ### Claim 17 (depends on 3) The display apparatus according to claim 3, further comprising: a first middle frame, comprising a first mounting plate and a first side plate, wherein the first mounting plate has a first mounting surface and a second mounting surface opposite to each other, the first side plate is arranged at periphery of the first mounting surface and forms a first mounting groove with the first mounting surface, wherein the first display panel, the first flexible circuit board and the rigid membrane are located in the first mounting groove, and the first part is located on a side of the second part away from the first mounting surface; a first main circuit board, provided on the first mounting surface, wherein a first connection terminal is provided on the first main circuit board, and the first connection terminal is electrically connected to the second part; a first cover plate, provided on a display side of the first display panel, wherein an edge of the first cover plate is beyond an edge of the first display panel, and a part of the first cover plate beyond the first display panel is overlapped on an end surface of the first side plate away from the first mounting surface. ### Claim 18 (depends on 4) The display apparatus according to claim 4, further comprising: a first middle frame, comprising a first mounting plate and a first side plate, wherein the first mounting plate has a first mounting surface and a second mounting surface opposite to each other, the first side plate is arranged at periphery of the first mounting surface and forms a first mounting groove with the first mounting surface, wherein the first display panel, the first flexible circuit board and the rigid membrane are located in the first mounting groove, and the first part is located on a side of the second part away from the first mounting surface; a first main circuit board, provided on the first mounting surface, wherein a first connection terminal is provided on the first main circuit board, and the first connection terminal is electrically connected to the second part; a first cover plate, provided on a display side of the first display panel, wherein an edge of the first cover plate is beyond an edge of the first display panel, and a part of the first cover plate beyond the first display panel is overlapped on an end surface of the first side plate away from the first mounting surface. ### Claim 19 (depends on 5) The display apparatus according to claim 5, further comprising: a first middle frame, comprising a first mounting plate and a first side plate, wherein the first mounting plate has a first mounting surface and a second mounting surface opposite to each other, the first side plate is arranged at periphery of the first mounting surface and forms a first mounting groove with the first mounting surface, wherein the first display panel, the first flexible circuit board and the rigid membrane are located in the first mounting groove, and the first part is located on a side of the second part away from the first mounting surface; a first main circuit board, provided on the first mounting surface, wherein a first connection terminal is provided on the first main circuit board, and the first connection terminal is electrically connected to the second part; a first cover plate, provided on a display side of the first display panel, wherein an edge of the first cover plate is beyond an edge of the first display panel, and a part of the first cover plate beyond the first display panel is overlapped on an end surface of the first side plate away from the first mounting surface. ### Claim 20 (depends on 6) The display apparatus according to claim 6, further comprising: a first middle frame, comprising a first mounting plate and a first side plate, wherein the first mounting plate has a first mounting surface and a second mounting surface opposite to each other, the first side plate is arranged at periphery of the first mounting surface and forms a first mounting groove with the first mounting surface, wherein the first display panel, the first flexible circuit board and the rigid membrane are located in the first mounting groove, and the first part is located on a side of the second part away from the first mounting surface; a first main circuit board, provided on the first mounting surface, wherein a first connection terminal is provided on the first main circuit board, and the first connection terminal is electrically connected to the second part; a first cover plate, provided on a display side of the first display panel, wherein an edge of the first cover plate is beyond an edge of the first display panel, and a part of the first cover plate beyond the first display panel is overlapped on an end surface of the first side plate away from the first mounting surface.