# US 12,010,865 B2 · OLED display panel with organic functional layer, manufacturing method thereof, 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 12,010,865 B2 - Document ID: US12010865B2 - Status: Granted - Kind: B2 - Application number: 17/254,340 - Filed: 2020-06-19 - Published: 2022-06-16 - Granted: 2024-06-11 - Earliest claimed: 2020-06-11 - Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Rui Lu; Cunjun Xia - Web page: https://patentgrep.com/patent/US12010865B2 ## CPC - H10K 71/70: Testing, e.g. accelerated lifetime tests - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 59/1201: {Manufacture or treatment} - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K 59/878: {comprising reflective means} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An organic light-emitting diode (OLED) display panel, a manufacturing method thereof, and an OLED display device are provided. The OLED display panel disposes an organic functional layer under an encapsulation layer and makes the organic functional layer undergo visible changes when in contact with water and oxygen. Therefore, encapsulation effect can be tested by merely knowing the changes of the organic functional layer, and a test time is shorter. Meanwhile, a minimum distance between boundaries of the organic functional layer and the encapsulation layer is greater than a coating precision accuracy of the encapsulation layer, thereby ensuring the encapsulation effect. ## Claims ### Claim 1 An organic light-emitting diode (OLED) display panel, comprising: a substrate; a drive circuit layer disposed on the substrate; a light-emitting functional layer disposed on the drive circuit layer; and an encapsulation layer comprising a first inorganic layer, a first organic layer and a second inorganic layer sequentially disposed on the light-emitting functional layer; wherein the first organic layer is disposed only in a display area of the OLED display panel; wherein in a non-display area of the OLED display panel, an organic functional layer is disposed under the encapsulation layer, a minimum distance between boundaries of the organic functional layer and the encapsulation layer is greater than a coating precision accuracy of the encapsulation layer, and the organic functional layer is configured to undergo visible changes when in contact with water and oxygen wherein the first organic layer in the display area is separated from the organic functional layer in the non-display area by the first inorganic layer and the second inorganic layer; and wherein the organic functional layer comprises a first organic functional layer and a first reflective layer, and the first organic functional layer is disposed between the first reflective layer and the encapsulation layer. ### Claim 2 (depends on 1) The OLED display panel according to claim 1, wherein the organic functional layer comprises a first organic functional layer and color-changing particles disposed in the first organic functional layer, and the color-changing particles are configured to change colors when in contact with water. ### Claim 3 (depends on 2) The OLED display panel according to claim 2, wherein a material of the first organic functional layer comprises at least one of acrylate compounds, methacrylate compounds, isoprene compounds, vinyl compounds, epoxy compounds, urethane compounds, cellulose-based compounds, or imide compounds. ### Claim 4 (depends on 2) The OLED display panel according to claim 2, wherein a material of the color-changing particles comprises at least one of anhydrous copper sulfate or ferrous salts. ### Claim 5 (depends on 1) The OLED display panel according to claim 1, wherein a material of the first reflective layer comprises at least one of silver or aluminum. ### Claim 6 (depends on 1) The OLED display panel according to claim 1, wherein a material of the first organic functional layer comprises a black organic photoresist. ### Claim 7 (depends on 1) The OLED display panel according to claim 1, wherein the organic functional layer comprises a first organic functional layer, a first reflective layer, and color-changing particles disposed in the first organic functional layer, and the color-changing particles are configured to change colors when in contact with water. ### Claim 8 A manufacturing method of an organic light-emitting diode (OLED) display panel, comprising following steps: providing a substrate; forming a drive circuit layer on the substrate; forming an organic functional layer on the drive circuit layer in a non-display area of the OLED display panel; forming a light-emitting functional layer on the drive circuit layer in a display area of the OLED display panel; and forming an encapsulation layer comprising a first inorganic layer, a first organic layer and a second inorganic layer sequentially on the light-emitting functional layer; wherein a minimum distance between boundaries of the organic functional layer and the encapsulation layer is greater than a coating precision accuracy of the encapsulation layer, and the organic functional layer is configured to undergo visible changes when in contact with water and oxygen; wherein the first organic layer is disposed only in a display area of the OLED display panel; wherein the first organic layer in the display area is separated from the organic functional layer in the non-display area by the first inorganic layer and the second inorganic layer; and wherein the organic functional layer comprises a first organic functional layer and a first reflective layer, and the first organic functional layer is disposed between the first reflective layer and the encapsulation layer. ### Claim 9 (depends on 8) The manufacturing method of the OLED display panel according to claim 8, wherein the step of forming the organic functional layer on the drive circuit layer in the non-display area of the OLED display panel comprises forming the organic functional layer on the drive circuit layer by inkjet printing. ### Claim 10 (depends on 8) The manufacturing method of the OLED display panel according to claim 8, wherein the step of forming the organic functional layer on the drive circuit layer in the non-display area of the OLED display panel comprises forming the organic functional layer on the drive circuit layer by exposure and development. ### Claim 11 (depends on 8) The manufacturing method of the OLED display panel according to claim 8, wherein the step of forming the encapsulation layer on the light-emitting functional layer comprises: forming a first inorganic layer of the encapsulation layer on the light-emitting functional layer by chemical vapor deposition; forming a first organic layer on the first inorganic layer by inkjet printing; and forming a second inorganic layer of the encapsulation layer on the light-emitting functional layer by chemical vapor deposition. ### Claim 12 An organic light-emitting diode (OLED) display device, comprising an OLED display panel and a cover plate, wherein the OLED display panel comprises: a substrate; a drive circuit layer disposed on the substrate; a light-emitting functional layer disposed on the drive circuit layer; and an encapsulation layer comprising a first inorganic layer, a first organic layer and a second inorganic layer sequentially disposed on the light-emitting functional layer; wherein the first organic layer is disposed only in a display area of the OLED display panel; wherein in a non-display area of the OLED display panel, an organic functional layer is disposed under the encapsulation layer, a minimum distance between boundaries of the organic functional layer and the encapsulation layer is greater than a coating precision accuracy of the encapsulation layer, and the organic functional layer is configured to undergo visible changes when in contact with water and oxygen wherein the first organic layer in the display area is separated from the organic functional layer in the non-display area by the first inorganic layer and the second inorganic layer; and wherein the organic functional layer comprises a first organic functional layer and a first reflective layer, and the first organic functional layer is disposed between the first reflective layer and the encapsulation layer. ### Claim 13 (depends on 12) The OLED display device according to claim 12, wherein the organic functional layer comprises a first organic functional layer and color-changing particles disposed in the first organic functional layer, and the color-changing particles are configured to change colors when in contact with water. ### Claim 14 (depends on 13) The OLED display device according to claim 13, wherein a material of the first organic functional layer comprises at least one of acrylate compounds, methacrylate compounds, isoprene compounds, vinyl compounds, epoxy compounds, urethane compounds, cellulose-based compounds, or imide compounds. ### Claim 15 (depends on 13) The OLED display device according to claim 13, wherein a material of the color-changing particles comprises at least one of anhydrous copper sulfate or ferrous salts. ### Claim 16 (depends on 12) The OLED display device according to claim 12, wherein a material of the first reflective layer comprises at least one of silver or aluminum. ### Claim 17 (depends on 12) The OLED display device according to claim 12, wherein a material of the first organic functional layer comprises a black organic photoresist. ### Claim 18 (depends on 12) The OLED display device according to claim 12, wherein the organic functional layer comprises a first organic functional layer, a first reflective layer, and color-changing particles disposed in the first organic functional layer, and the color-changing particles are configured to change colors when in contact with water.