# US 2017/0257939 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0257939 A1 - Document ID: US20170257939A1 - Status: Published application - Kind: A1 - Application number: 15/452,022 - Filed: 2017-03-07 - Published: 2017-09-07 - Earliest claimed: 2016-03-07 - Assignees: Japn Display Inc. - Applicants: Japan Display Inc. - Inventors: Takumi SANO; Yasushi KAWATA - Web page: https://patentgrep.com/patent/US20170257939A1 ## CPC - H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)} - H05K 1/111: {Pads for surface mounting, e.g. lay-out} - H05K 3/361: {Assembling flexible printed circuits with other printed circuits} - H05K 3/323: {by applying an anisotropic conductive adhesive layer over an array of pads} - H05K 2201/10128: Display - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract According to one embodiment, a display device includes a first flexible substrate including an insulating substrate with a first area, a second area adjacent to the first area, and a through hole, and a pad electrode, a second flexible substrate including a connection line, the second flexible substrate disposed below the first flexible substrate, and an anisotropy conductive film which electrically connects the pad electrode and the connection line, wherein the anisotropy conductive film is disposed between the second area and the second flexible substrate, and has a first film thickness in a first position and a second film thickness in a second position, where the first film thickness is greater than the second film thickness. ## Claims ### Claim 1 A display device comprising: a first flexible substrate including an insulating substrate including a first area, a second area adjacent to the first area, and a through hole formed in the second area, and a pad electrode disposed above the through hole; a second flexible substrate including a connection line disposed to be opposed to the through hole, the second flexible substrate disposed below the first flexible substrate; and an anisotropy conductive film which electrically connects the pad electrode and the connection line; wherein the anisotropy conductive film is disposed between the second area and the second flexible substrate, and has a first film thickness in a first position which is adjacent to the first area and a second film thickness in a second position which is closer to the through hole than is the first position, where the first film thickness is greater than the second film thickness. ### Claim 2 (depends on 1) The display device of claim 1, wherein the second area is thinner than the first area. ### Claim 3 (depends on 2) The display device of claim 2, wherein the anisotropy conductive film is disposed between the first area and the second flexible substrate and covers a surface between the first area and the second area. ### Claim 4 (depends on 1) The display device of claim 1, wherein the insulating substrate has a first lower surface in the first area and a second lower surface in the second area, and the anisotropy conductive film is apart from the first lower surface and contacts the second lower surface. ### Claim 5 (depends on 4) The display device of claim 4, wherein the second flexible substrate is inclined with respect to the second lower surface and has a flat surface or a curved surface from the first position to the second position. ### Claim 6 (depends on 1) The display device of claim 1, wherein the connection line is inclined with respect to the pad electrode. ### Claim 7 (depends on 1) The display device of claim 1, further comprising a protection member disposed below the first flexible substrate. ### Claim 8 (depends on 7) The display device of claim 7, wherein the insulating substrate includes a first lower surface in the first area and a second lower surface in the second area, and the protection member contacts the first lower surface. ### Claim 9 (depends on 1) The display device of claim 1, wherein an end of the second flexible substrate is positioned below the second area. ### Claim 10 A display device comprising: a first flexible substrate including an insulating substrate including a first area, a second area adjacent to the first area, and a through hole formed in the second area, and a pad electrode disposed above the through hole; a second flexible substrate including a connection line disposed to be opposed to the through hole, the second flexible substrate disposed below the first flexible substrate; and an anisotropy conductive film which electrically connects the pad electrode and the connection line, wherein the second area has a fourth film thickness in a fourth position which is adjacent to the first area and a fifth film thickness in a fifth position which is closer to the through hole than is the fourth position, where the fourth film thickness is greater than the fifth film thickness. ### Claim 11 (depends on 10) The display device of claim 10, wherein the insulating substrate includes a first lower surface in the first area and a second lower surface in the second area, and the second lower surface is inclined with respect to the first lower surface. ### Claim 12 (depends on 11) The display device of claim 11, further comprising a first protection member disposed blow the first flexible substrate and contacting the first lower surface and a second protection member disposed below the first protection member, wherein the second lower surface contacts the anisotropy conductive film. ### Claim 13 (depends on 12) The display device of claim 12, wherein the first protection member has a first end surface which is inclined and contacts the anisotropy conductive film. ### Claim 14 (depends on 13) The display device of claim 13, wherein the first end surface is curved. ### Claim 15 (depends on 12) The display device of claim 12, wherein the second protection member is formed of aluminum or an aluminum alloy. ### Claim 16 (depends on 12) The display device of claim 12, wherein the first protection member includes a third lower surface contacting the second protection member and a projection contacting the anisotropy conductive film and projecting in the second flexible substrate side than does the third lower surface. ### Claim 17 (depends on 1) The display device of claim 1, further comprising a counter substrate opposed to the first flexible substrate and disposed above the first flexible substrate, and an adhesive layer which adheres the first flexible substrate and the counter substrate, wherein the through hole is formed in a position overlapping the adhesive layer.