# US 12,016,220 B2 · Stretchable 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 12,016,220 B2 - Document ID: US12016220B2 - Status: Granted - Kind: B2 - Application number: 17/294,408 - Filed: 2021-03-19 - Published: 2022-10-06 - Granted: 2024-06-18 - Earliest claimed: 2021-01-12 - Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Wenqiang Wang - Web page: https://patentgrep.com/patent/US12016220B2 ## CPC - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 77/111: {Flexible substrates} - H10K 2102/311: {Flexible OLED} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A stretchable display panel and a display device are provided. The stretchable display panel includes a center display area, a transition display area, and a wiring area, and in a direction from the center display area to the wiring area, a width of bridge structures in the transition display area gradually increases. Island structures located at a peripheral area include an edge bridge structure, and through meeting of adjacent edge bridge structures, a width of the edge bridge structures is increased to increase tensile strength of the edge bridge structures, decreasing risk of wires breaking in the transition display area. ## Claims ### Claim 1 A stretchable display panel, comprising a display area and a wiring area surrounding the display area, wherein the display area comprises a center display area and a transition display area located between the center display area and the wiring area, and the stretchable display panel further comprises: a plurality of island structures arranged in the display area in an array, wherein at least one pixel unit is disposed on each of the island structures; and a plurality of bridge structures, wherein each of the bridge structures is connected between two adjacent island structures, and a plurality of wires are disposed on the bridge structures; wherein in a direction from the center display area to the wiring area, a width of the bridge structures in the transition display area gradually increases, the island structures located at a peripheral area comprise at least one edge bridge structure configured to connect the island structures to the wiring area; and wherein at least two adjacent island structures located at the peripheral area have a first opening defined therebetween, one second opening is defined on one side of each of the two adjacent island structures close to the wiring area, the first opening and two second openings define two adjacent edge bridge structures, and the two adjacent edge bridge structures meet between the two second openings. ### Claim 2 (depends on 1) The stretchable display panel as claimed in claim 1, wherein a shape of the second opening is different from a shape of the first opening. ### Claim 3 (depends on 1) The stretchable display panel as claimed in claim 1, wherein the plurality of wires located on the two adjacent edge bridge structures meet between the two second openings through the edge bridge structures and are connected to the wiring area. ### Claim 4 (depends on 1) The stretchable display panel as claimed in claim 1, wherein the transition display area is a circular area formed by a plurality of sides sequentially connected in a head-to-tail manner, the transition display area comprises a middle area located at a middle of each of the sides, and the second openings are at least separately defined in the middle area. ### Claim 5 (depends on 1) The stretchable display panel as claimed in claim 1, wherein a distance between two adjacent second openings is greater than or equal to a sum of widths of two edge bridge structures meeting between the two adjacent second openings. ### Claim 6 (depends on 5) The stretchable display panel as claimed in claim 5, wherein an end of the first opening close to the wiring area extends to between the two adjacent second openings and does not exceed a virtual line joining sides of the two adjacent second openings close to the wiring area. ### Claim 7 (depends on 6) The stretchable display panel as claimed in claim 6, wherein a length of a part of the first opening extending to between the two adjacent second openings is less than or equal to half of a distance between one side of the second openings close to the wiring area and one side of the second openings away from the wiring area. ### Claim 8 (depends on 1) The stretchable display panel as claimed in claim 1, wherein the stretchable display panel comprises a flexible substrate and a plurality of inorganic layers and organic layers stacked on the flexible substrate, and the second openings penetrate the inorganic layers, the organic layers, and the flexible substrate. ### Claim 9 (depends on 1) The stretchable display panel as claimed in claim 1, wherein the transition display area comprises a first sub-transition display area, a second sub-transition display area, and a third sub-transition display area sequentially surrounding the center display area, and a width of the bridge structures in the first sub-transition display area, a width of the bridge structures in the second sub-transition display area, and a width of the bridge structures in the third sub-transition display area gradually increase. ### Claim 10 (depends on 9) The stretchable display panel as claimed in claim 9, wherein widths of the bridge structures in a same sub-transition display area are equal. ### Claim 11 (depends on 9) The stretchable display panel as claimed in claim 9, wherein the bridge structures comprise a first end connected to one island structure and a second end connected to another island structure, the bridge structures in the first sub-transition display area and the bridge structures in the second sub-transition display area further comprise at least a first curved part connected to the first end and a second curved part connected to the second end, and curvatures of the first curved part and the second curved part located in the first sub-transition display area are greater than curvatures of the first curved part and of the second curved part located in the second sub-transition display area. ### Claim 12 (depends on 11) The stretchable display panel as claimed in claim 11, wherein curvatures of the first curved part and the second curved part located in a same sub-transition display area are equal. ### Claim 13 (depends on 11) The stretchable display panel as claimed in claim 11, wherein the bridge structures in the third sub-transition display area further comprise a connection part connected to the first end and the second end, and the connection part is a straight line shape. ### Claim 14 (depends on 1) The stretchable display panel as claimed in claim 1, wherein a ratio of a width of the transition display area to a width of the display area is between 3.9%-4.8%. ### Claim 15 (depends on 1) The stretchable display panel as claimed in claim 1, wherein a center-to-center distance between any two adjacent island structures is equal. ### Claim 16 A display device, comprising a stretchable display panel, wherein the stretchable display panel comprises a display area and a wiring area surrounding the display area, the display area comprises a center display area and a transition display area located between the center display area and the wiring area, and the stretchable display panel further comprises: a plurality of island structures arranged in the display area in an array, wherein at least one pixel unit is disposed on each of the island structures; and a plurality of bridge structures, wherein each of the bridge structures is connected between two adjacent island structures, and a plurality of wires are disposed on the bridge structures; wherein in a direction from the center display area to the wiring area, a width of the bridge structures in the transition display area gradually increases, the island structures located at a peripheral area comprise at least one edge bridge structure configured to connect the island structures to the wiring area; and wherein at least two adjacent island structures located at the peripheral area have a first opening defined therebetween, one second opening is defined on one side of each of the two adjacent island structures close to the wiring area, the first opening and two second openings define two adjacent edge bridge structures, and the two adjacent edge bridge structures meet between the two second openings. ### Claim 17 (depends on 16) The display device as claimed in claim 16, wherein the plurality of wires located on the two adjacent edge bridge structures meet between the two second openings through the edge bridge structures and are connected to the wiring area. ### Claim 18 (depends on 16) The display device as claimed in claim 16, wherein the transition display area is a circular area formed by a plurality of sides sequentially connected in a head-to-tail manner, the transition display area comprises a middle area located at a middle of each of the sides, and the second openings are at least separately defined in the middle area. ### Claim 19 (depends on 16) The display device as claimed in claim 16, wherein a distance between two adjacent second openings is greater than or equal to a sum of widths of two edge bridge structures meeting between the two adjacent second openings. ### Claim 20 A stretchable display panel, comprising a display area and a wiring area surrounding the display area, wherein the display area comprises a center display area and a transition display area located between the center display area and the wiring area, and the stretchable display panel further comprises: a plurality of island structures arranged in the display area in an array, wherein at least one pixel unit is disposed on each of the island structures; and a plurality of bridge structures, wherein each of the bridge structures is connected between two adjacent island structures, and a plurality of wires are disposed on the bridge structures; wherein in a direction from the center display area to the wiring area, a width of the bridge structures in the transition display area gradually increases, the island structures located at a peripheral area comprise at least one edge bridge structure configured to connect the island structures to the wiring area; and wherein at least two adjacent island structures located at the peripheral area have a first opening defined therebetween, one second opening is defined on one side of each of the two adjacent island structures close to the wiring area, the first opening and two second openings define two adjacent edge bridge structures, and the two adjacent edge bridge structures meet between the two second openings; wherein a distance between two adjacent second openings is greater than or equal to a sum of widths of two edge bridge structures meeting between the two adjacent second openings; and wherein an end of the first opening close to the wiring area extends to between the two adjacent second openings and does not exceed a virtual line joining sides of the two adjacent second openings close to the wiring area.