# US 2019/0318689 A1 · Display device and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0318689 A1 - Document ID: US20190318689A1 - Status: Published application - Kind: A1 - Application number: 16/377,690 - Filed: 2019-04-08 - Published: 2019-10-17 - Earliest claimed: 2018-04-11 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Sung Hoon KIM - Web page: https://patentgrep.com/patent/US20190318689A1 ## CPC - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/3225: using an active matrix - H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)} - H05K 1/0281: {Reinforcement details thereof} - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/873: {Encapsulations} - G09G 2300/0426: Layout of electrodes and connections - H05K 3/287: {Photosensitive compositions} - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K 2102/311: {Flexible OLED} - Y02E 10/549: Organic PV cells - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A display device and a method of manufacturing a display device are provided. A display device may include: a display panel including a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area; a driving circuit chip on the second area of the display panel; a flexible printed circuit board on the second area of the display panel and spaced apart from the driving circuit chip; and a bending protection layer including a first pre-formed bending protection layer covering a portion of the flexible printed circuit board, and a first post-formed bending protection layer covering the bending area of the display panel. ## Claims ### Claim 1 A display device comprising: a display panel comprising a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area; a driving circuit chip on the second area of the display panel; a flexible printed circuit board on the second area of the display panel and spaced apart from the driving circuit chip; and a bending protection layer comprising a first pre-formed bending protection layer covering a portion of the flexible printed circuit board, and a first post-formed bending protection layer covering the bending area of the display panel. ### Claim 2 (depends on 1) The display device of claim 1, wherein the first post-formed bending protection layer comprises a same material as that of the first pre-formed bending protection layer. ### Claim 3 (depends on 1) The display device of claim 1, wherein the first pre-formed bending protection layer comprises a photo-curable material, and wherein the first post-formed bending protection layer comprises a thermo-curable material. ### Claim 4 (depends on 1) The display device of claim 1, wherein a hardness of the first pre-formed bending protection layer is greater than a hardness of the first post-formed bending protection layer. ### Claim 5 (depends on 1) The display device of claim 1, wherein the first post-formed bending protection layer covers the driving circuit chip. ### Claim 6 (depends on 5) The display device of claim 5, wherein the first pre-formed bending protection layer does not overlap the driving circuit chip in a plan view. ### Claim 7 (depends on 1) The display device of claim 1, wherein the first pre-formed bending protection layer covers the driving circuit chip. ### Claim 8 (depends on 1) The display device of claim 1, wherein the bending protection layer further comprises a second pre-formed bending protection layer on the first area of the display panel. ### Claim 9 (depends on 8) The display device of claim 8, wherein the bending protection layer further comprises: a third pre-formed bending protection layer on the second area of the display panel and spaced apart from the first pre-formed bending protection layer with the driving circuit chip therebetween; and a second post-formed bending protection layer between the first pre-formed bending protection layer and the third pre-formed bending protection layer and covering the driving circuit chip. ### Claim 10 (depends on 9) The display device of claim 9, wherein a height of the first pre-formed bending protection layer is lower than a height of the third pre-formed bending protection layer. ### Claim 11 (depends on 10) The display device of claim 10, wherein a height of the second post-formed bending protection layer is lower than a height of the first post-formed bending protection layer. ### Claim 12 (depends on 8) The display device of claim 8, further comprising a protective film opposite to the bending protection layer with the display panel therebetween and comprising an opening portion corresponding to the bending area of the display panel. ### Claim 13 (depends on 12) The display device of claim 12, wherein the second pre-formed bending protection layer overlaps an end of the protective film which is exposed by the opening portion in a plan view. ### Claim 14 (depends on 1) The display device of claim 1, wherein an upper surface of the first post-formed bending protection layer is flat. ### Claim 15 (depends on 1) The display device of claim 1, wherein the first post-formed bending protection layer comprises a first layer on the display panel and a second layer on the first layer and comprising a different material from that of the first layer. ### Claim 16 (depends on 1) The display device of claim 1, further comprising a polarization plate on the first area of the display panel, and wherein the bending protection layer is in contact with the polarization plate. ### Claim 17 A method of manufacturing a display device, the method comprising: forming a display panel comprising a first area, a second area spaced apart from the first area, and a bending area between the first area and the second area; attaching a driving circuit chip on the second area of the display panel; attaching a flexible printed circuit board spaced apart from the driving circuit chip on the second area of the display panel; forming a pre-formed bending protection layer covering a portion of the flexible printed circuit board; and forming a post-formed bending protection layer covering the bending area of the display panel. ### Claim 18 (depends on 17) The method of claim 17, wherein forming the pre-formed bending protection layer comprises: coating a photo-curable material on the second area of the display panel and the portion of the flexible printed circuit board; and pre-curing the photo-curable material with an ultraviolet light. ### Claim 19 (depends on 18) The method of claim 18, wherein forming the post-formed bending protection layer comprises: coating a thermo-curable material on the bending area of the display panel; and curing the thermo-curable material with heat. ### Claim 20 (depends on 17) The method of claim 17, wherein forming the post-formed bending protection layer is performed after forming the pre-formed bending protection layer.