# US 12,217,635 B2 · Foldable display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,217,635 B2 - Document ID: US12217635B2 - Status: Granted - Kind: B2 - Application number: 18/237,308 - Filed: 2023-08-23 - Published: 2023-12-07 - Granted: 2025-02-04 - Earliest claimed: 2020-06-30 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: MinJic Lee; HongSik Kim; Yeseul Han; JeongOk Jo; Kwanghyun Choi - Web page: https://patentgrep.com/patent/US12217635B2 ## CPC - H10K 77/111: {Flexible substrates} - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - H10K 59/1213: {the pixel elements being TFTs} - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/878: {comprising reflective means} - H10K 59/8794: {Arrangements for heating and cooling} - H10K 59/87: {Passivation; Containers; Encapsulations} - Y02E 10/549: Organic PV cells - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A foldable display device that includes a folding area and non-folding area, is discussed. The foldable display device can include a first substrate, a second substrate corresponding to the first substrate and including the plurality of unit pixels, a thin film transistor disposed on the second substrate, an organic light emitting diode disposed on the thin film transistor, and a mesh pattern disposed between the first substrate and the second substrate and having a plurality of openings, and made of metal. ## Claims ### Claim 1 A foldable display device that includes a folding area and non-folding area, the foldable display device comprising: a first substrate; a second substrate on the first substrate and including a plurality of unit pixels; a thin film transistor disposed on the second substrate; an organic light emitting diode disposed on the thin film transistor; and a mesh pattern disposed between the first substrate and the second substrate and having a plurality of openings, and made of metal. ### Claim 2 (depends on 1) The foldable display device according to claim 1, further comprising: a support substrate having an opening pattern; the first substrate disposed on the support substrate. ### Claim 3 (depends on 1) The foldable display device according to claim 1, further comprising: an insulating layer between the first substrate and the second substrate, wherein the insulating layer fully covers the mesh pattern. ### Claim 4 (depends on 2) The foldable display device according to claim 2, further comprising: a back plate between the support substrate and the first substrate, wherein the back plate is made of a transparent material. ### Claim 5 (depends on 1) The foldable display device according to claim 1, wherein openings of the mesh pattern in the folding area are smaller in size than openings of the mesh pattern in the non-folding areas. ### Claim 6 (depends on 1) The foldable display device according to claim 1, further comprising: folding boundary areas between the folding area and the non-folding areas, wherein the openings of the mesh pattern in the folding area are smaller in size than openings of the mesh pattern in the folding boundary areas. ### Claim 7 (depends on 6) The foldable display device according to claim 6, wherein the openings of the mesh pattern in the folding boundary areas are smaller in size than the openings of the mesh pattern in the non-folding areas. ### Claim 8 (depends on 1) The foldable display device according to claim 1, wherein the openings of the mesh pattern gradually increase in size from the folding area toward the non-folding areas. ### Claim 9 (depends on 1) The foldable display device according to claim 1, wherein a pattern of the mesh pattern is disposed corresponding to the size of each of the plurality of unit pixels. ### Claim 10 (depends on 1) The foldable display device according to claim 1, wherein each of the plurality of unit pixels includes a plurality of sub-pixels, and an opening of the mesh pattern is disposed corresponding to at least two of the sub-pixels. ### Claim 11 (depends on 1) The foldable display device according to claim 1, wherein all the openings of the mesh pattern in the folding area have the identical size. ### Claim 12 (depends on 1) The foldable display device according to claim 1, wherein all the openings of the mesh pattern in the non-folding areas have the identical size. ### Claim 13 (depends on 1) The foldable display device according to claim 1, further comprising a display area having the plurality of unit pixels and a non-display area surrounding the display area, wherein the mesh pattern is greater in size than the display area and smaller in size than the first substrate. ### Claim 14 (depends on 1) The foldable display device according to claim 1, wherein the folding area includes a first folding area and a second folding area spaced apart from the first folding area, and the first folding area is an in-folding area and the second folding area is an out-folding area. ### Claim 15 (depends on 1) The foldable display device according to claim 1, wherein a line width of a wiring line of the mesh pattern in a folding boundary area between the folding area and the non-folding area is smaller than a line width of a wiring line of the mesh pattern in the folding area and greater than a line width of a wiring line of the mesh pattern in the non-folding area. ### Claim 16 (depends on 6) The foldable display device according to claim 6, further comprising: a support substrate having an opening pattern corresponding to the folding area, wherein the folding boundary area is disposed corresponding to an edge area of the opening pattern of the support substrate. ### Claim 17 (depends on 16) The foldable display device according to claim 16, wherein all the openings of the mesh pattern in the folding boundary area have the identical size. ### Claim 18 (depends on 16) The foldable display device according to claim 16, wherein openings of the mesh pattern in the folding boundary area gradually increase in size as getting farther away from the folding area. ### Claim 19 (depends on 14) The foldable display device according to claim 14, wherein openings of the mesh pattern in the first folding area are identical in size to openings of the mesh pattern in the second folding area. ### Claim 20 (depends on 1) The foldable display device according to claim 1, wherein the mesh pattern is formed as an opaque metal layer.