# US 12,005,684 B2 · Display panel and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,684 B2 - Document ID: US12005684B2 - Status: Granted - Kind: B2 - Application number: 17/275,288 - Filed: 2020-12-31 - Published: 2022-06-30 - Granted: 2024-06-11 - Earliest claimed: 2020-12-29 - Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Cuilin Zhu - Web page: https://patentgrep.com/patent/US12005684B2 ## CPC - B32B 3/02: characterised by features of form at particular places, e.g. in edge regions {(non-uniform thickness B32B3/263)} - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - B32B 7/02: Physical, chemical or physicochemical properties - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 2307/7375: Linear, e.g. length, distance or width - B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays - Y02E 10/549: Organic PV cells - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - 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 display panel and a display device are disclosed and include a first non-bending region and a second non-bending region disposed opposite to each other, a support structure disposed between the first non-bending region and the second non-bending region, and a bending region connected to the first non-bending region and the second non-bending region. A step structure is formed on a side of the support structure near the bending region such that when the bending region is squeezed by an external force, the step structure on the support structure can disperse stress, and the bending region would not deform extremely easily, which prevents broken wires and improve a production rate. ## Claims ### Claim 1 A display panel, comprising: a bending region; a first non-bending region; a second non-bending region, the second non-bending region disposed opposite to the first non-bending region, and the second non-bending region connected to the first non-bending region through the bending region; and a first support structure, the first support structure disposed between the first non-bending region and the second non-bending region, a step structure formed on a side of the first support structure near the bending region, and the step structure configured to support the bending region; wherein the step structure comprises at least three step units arranged sequentially along a direction from the first non-bending region to the second non-bending region, or from the second non-bending region to the first non-bending region. ### Claim 2 (depends on 1) The display panel according to claim 1, wherein a step range of the step structure along an extension direction of the first non-bending region is 0.1 mm-0.3 mm. ### Claim 3 (depends on 1) The display panel according to claim 1, wherein the first support structure comprises: a first support layer, the first support layer directly connected to the first non-bending region, and the first support layer supporting the first non-bending region; a second support layer, the second support layer disposed under the first support layer; and a third support layer, the third support layer disposed under the second support layer and located above the second non-bending region, and the third support layer supporting the second non-bending region; wherein the at least three step units are formed by the first support layer, the second support layer, and the third support layer. ### Claim 4 (depends on 3) The display panel according to claim 3, wherein a side of the second support layer near the bending region exceeds the first support layer; a side of the third support layer near the bending region exceeds the second support layer. ### Claim 5 (depends on 4) The display panel according to claim 4, wherein a length of the second support layer exceeding the first support layer is equal to a length of the third support layer exceeding the second support layer. ### Claim 6 (depends on 3) The display panel according to claim 3, wherein the second support layer is a multi-layer structure that is laminated, and a step structure is formed on a side of the multi-layer structure forming the second support layer near the bending region. ### Claim 7 (depends on 6) The display panel according to claim 6, wherein material of each layer of the multi-layer structure is different. ### Claim 8 (depends on 3) The display panel according to claim 3, wherein material of the first support layer and material of the third support layer are the same. ### Claim 9 (depends on 1) The display panel according to claim 1, wherein a photosensitive adhesive after curing is connected to the first non-bending region and the second non-bending region, and the photosensitive adhesive after curing is bent to form the bending region. ### Claim 10 (depends on 1) A display device, comprising the display panel according to claim 1, wherein the display panel comprises: a bending region; a first non-bending region; a second non-bending region, the second non-bending region disposed opposite to the first non-bending region, and the second non-bending region connected to the first non-bending region through the bending region; and a first support structure, the first support structure disposed between the first non-bending region and the second non-bending region, a step structure formed on a side of the first support structure near the bending region, and the step structure configured to support the bending region; wherein the step structure comprises at least three step units arranged sequentially along a direction from the first non-bending region to the second non-bending region, or from the second non-bending region to the first non-bending region. ### Claim 11 (depends on 10) The display device according to claim 10, wherein a step range of the step structure along an extension direction of the first non-bending region is 0.1 mm-0.3 mm. ### Claim 12 (depends on 10) The display panel according to claim 10, wherein the first support structure comprises: a first support layer, the first support layer directly connected to the first non-bending region, and the first support layer supporting the first non-bending region; a second support layer, the second support layer disposed under the first support layer; and a third support layer, the third support layer disposed under the second support layer and located above the second non-bending region, and the third support layer supporting the second non-bending region; wherein the at least three step units are formed by the first support layer, the second support layer, and the third support layer. ### Claim 13 (depends on 12) The display panel according to claim 12, wherein a side of the second support layer near the bending region exceeds the first support layer; a side of the third support layer near the bending region exceeds the second support layer. ### Claim 14 (depends on 13) The display panel according to claim 13, wherein a length of the second support layer exceeding the first support layer is equal to a length of the third support layer exceeding the second support layer. ### Claim 15 (depends on 12) The display panel according to claim 12, wherein the second support layer is a multi-layer structure that is laminated, and a step structure is formed on a side of the multi-layer structure forming the second support layer near the bending region. ### Claim 16 (depends on 15) The display panel according to claim 15, wherein material of each layer of the multi-layer structure is different. ### Claim 17 (depends on 12) The display panel according to claim 12, wherein material of the first support layer and material of the third support layer are the same. ### Claim 18 (depends on 10) The display panel according to claim 10, wherein a photosensitive adhesive after curing is connected to the first non-bending region and the second non-bending region, and the photosensitive adhesive after curing is bent to form the bending region.