# US 2022/0037618 A1 · Oled encapsulation structure, method of encapsulating the oled, and oled display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0037618 A1 - Document ID: US20220037618A1 - Status: Published application - Kind: A1 - Application number: 16/770,514 - Filed: 2020-04-09 - Published: 2022-02-03 - Earliest claimed: 2020-03-26 - Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Zhao Li - Web page: https://patentgrep.com/patent/US20220037618A1 ## CPC - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The present application relates to an organic light-emitting diode (OLED) encapsulation structure, a method of encapsulating an organic light-emitting diode (OLED), and an organic light-emitting diode (OLED) display device. The OLED encapsulation structure includes a substrate, a self-healing encapsulation layer, and at least two inorganic encapsulation layers, wherein a cavity is formed between two adjacent layers of the inorganic encapsulation layers, a layer of the self-healing encapsulation layer is provided in the cavity, and one of the inorganic encapsulation layers covers the OLED device. The self-healing encapsulation layer 13 is used to achieve self-healing of cracks at room temperature to prevent water and oxygen from entering the interior of the OLED panel through cracks. ## Claims ### Claim 1 An organic light-emitting diode (OLED) encapsulation structure, comprising a substrate, a self-healing encapsulation layer, and at least two inorganic encapsulation layers, wherein a number of layers of the self-healing encapsulation layer is one less than a number of layers of the inorganic encapsulation layers, and the self-healing encapsulation layer is made of a material comprising methyl methacrylate and n-butyl acrylate that are mixed in a preset molar ratio; and wherein an OLED device is fabricated on the substrate, a cavity is formed between two adjacent layers of the inorganic encapsulation layers, a layer of the self-healing encapsulation layer is provided in the cavity, and one of the inorganic encapsulation layers covers the OLED device. ### Claim 2 (depends on 1) The OLED encapsulation structure according to claim 1, wherein the preset molar ratio ranges from 45/55 to 55/45. ### Claim 3 (depends on 1) The OLED encapsulation structure according to claim 1, wherein the inorganic encapsulation layer is made of a material comprising silicon nitride. ### Claim 4 (depends on 1) The OLED encapsulation structure according to claim 1, wherein the material of the self-healing encapsulation layer further comprises a curing agent. ### Claim 5 A method of encapsulating an organic light-emitting diode (OLED), comprising the following steps: (1) providing a substrate on which an OLED device is fabricated; (2) forming an inorganic encapsulation layer on the substrate to cover the OLED device; (3) forming a self-healing encapsulation layer on the inorganic encapsulating layer in the step (2), wherein the self-healing encapsulation layer is made of a material comprising methyl methacrylate and n-butyl acrylate that are mixed in a preset molar ratio; (4) forming an inorganic encapsulation layer on the self-healing encapsulation layer in the step (3), wherein a cavity is formed between the inorganic encapsulation layer in the step (2) and the inorganic encapsulation layer in the step (4), and the self-healing encapsulation layer in the step (4) is wrapped in the cavity; and (5) performing the steps (3) and (4) cyclically until formations of all the inorganic encapsulation layers and the self-healing encapsulation layer have been completed. ### Claim 6 (depends on 5) The method of encapsulating the OLED according to claim 5, wherein the step of forming a self-healing encapsulation layer on the inorganic encapsulation layer in the step (2) comprises the steps as follows: spray-coating the material of the self-healing encapsulation layer on the inorganic encapsulation layer in the step (2); and after the material of the self-healing encapsulation layer is leveled, performing ultraviolet curing to obtain the self-healing encapsulation layer. ### Claim 7 (depends on 5) The method of encapsulating the OLED according to claim 5, wherein the material of the self-healing encapsulation layer further comprises a curing agent. ### Claim 8 (depends on 7) The method of encapsulating the OLED according to claim 7, wherein the material of the self-healing encapsulation layer is prepared based on the following steps: mixing the methyl methacrylate, the n-butyl acrylate, and the curing agent to obtain a mixture; and degassing the mixture under vacuum to obtain the material of the self-healing encapsulation layer. ### Claim 9 (depends on 5) The method of encapsulating the OLED according to claim 5, wherein the preset molar ratio ranges from 45/55 to 55/45. ### Claim 10 An organic light-emitting diode (OLED) display device, comprising an OLED display panel which comprises an OLED encapsulation structure, wherein the OLED encapsulation structure comprises a substrate, a self-healing encapsulation layer, and at least two inorganic encapsulation layers, wherein a number of layers of the self-healing encapsulation layer is one less than a number of layers of the inorganic encapsulation layers, and the self-healing encapsulation layer is made of a material comprising methyl methacrylate and n-butyl acrylate that are mixed in a preset molar ratio; and wherein an OLED device is fabricated on the substrate, a cavity is formed between two adjacent layers of the inorganic encapsulation layers, a layer of the self-healing encapsulation layer is provided in the cavity, and one of the inorganic encapsulation layers covers the OLED device. ### Claim 11 (depends on 10) The OLED display device according to claim 10, wherein the preset molar ratio ranges from 45/55 to 55/45. ### Claim 12 (depends on 10) The OLED display device according to claim 10, wherein the inorganic encapsulation layer is made of a material comprising silicon nitride. ### Claim 13 (depends on 10) The OLED display device according to claim 10, wherein the material of the self-healing encapsulation layer further comprises a curing agent.