# US 2019/0172891 A1 · Oled panel for lighting device and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0172891 A1 - Document ID: US20190172891A1 - Status: Published application - Kind: A1 - Application number: 16/203,285 - Filed: 2018-11-28 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Kyu-Hwang LEE; Taejoon SONG; Chulho KIM; Jongmin KIM - Web page: https://patentgrep.com/patent/US20190172891A1 ## CPC - H10K 59/80516: {combined with auxiliary electrodes, e.g. ITO layer combined with metal lines} - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/873: {Encapsulations} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The present application relates to an OLED panel for a lighting device and a method of manufacturing the same. An OLED panel for a lighting device includes: a substrate; a auxiliary wiring pattern having a plurality of wiring lines disposed on the substrate; a first electrode disposed on the substrate where the auxiliary wiring pattern is disposed, and having a planarized upper surface; a passivation layer disposed on the first electrode and disposed at least in an area above the auxiliary wiring pattern; an OLED emission structure disposed on the first electrode; and a second electrode disposed on the OLED emission structure. In the OLED panel for a lighting device, luminance uniformity may be improved through a dual auxiliary wiring pattern, and the upper surface of the first electrode is planarized. Accordingly, the area of the passivation layer is reduced, and thus a light-emitting area may be increased. ## Claims ### Claim 1 An organic light-emitting diode (OLED) panel for a lighting device, the OLED panel comprising: a substrate; an auxiliary wiring pattern disposed on the substrate, the auxiliary wiring pattern including a plurality of auxiliary wiring lines spaced apart from each other; a first electrode disposed on the substrate and the auxiliary wiring pattern, the first electrode having a planarized upper surface; a passivation layer disposed on the first electrode and the auxiliary wiring pattern; an OLED emission structure disposed on the first electrode; and a second electrode disposed on the OLED emission structure and the passivation layer. ### Claim 2 (depends on 1) The OLED panel for a lighting device of claim 1, wherein the auxiliary wiring pattern includes a first auxiliary wiring pattern and a second auxiliary wiring pattern, the first auxiliary wiring pattern is disposed on the substrate. ### Claim 3 (depends on 2) The OLED panel for a lighting device of claim 2, wherein the first auxiliary wiring pattern has a cross-section of a taper shape having a width decreasing toward the second auxiliary wiring pattern. ### Claim 4 (depends on 1) The OLED panel for a lighting device of claim 1, wherein the OLED panel further comprises a first electrode pad connected to the first electrode and a second electrode pad connected to the second electrode, wherein the first electrode pad is formed simultaneously with the first electrode and the second electrode pad is formed simultaneously with the second electrode, and wherein the first electrode pad is of the same material as the first electrode and the second electrode pad is of the same material as the second electrode. ### Claim 5 (depends on 2) The OLED panel for a lighting device of claim 2, wherein the auxiliary wiring pattern includes a second auxiliary wiring pattern, the second auxiliary wiring pattern is disposed on the first auxiliary wiring pattern. ### Claim 6 (depends on 5) The OLED panel for a lighting device of claim 5, wherein the cross-section of the auxiliary wiring pattern includes a cross-section of the first auxiliary wiring pattern having a taper shape with a width decreasing toward the second auxiliary wiring pattern. ### Claim 7 (depends on 5) The OLED panel for a lighting device of claim 5, the first auxiliary wiring pattern and the second auxiliary wiring pattern are formed with different materials. ### Claim 8 (depends on 1) The OLED panel for a lighting device of claim 1, further comprising: an encapsulation layer disposed on the second electrode, wherein a cross-section of the passivation layer has a taper shape having a width decreasing toward the second electrode. ### Claim 9 (depends on 1) The OLED panel for a lighting device of claim 1, wherein the passivation layer is formed by encompassing a part of the first electrode. ### Claim 10 A method of manufacturing a lighting device, the method comprising: disposing an auxiliary wiring pattern forming material on a substrate; forming an auxiliary wiring pattern by etching the auxiliary wiring pattern forming material to leave auxiliary wiring lines; disposing a first electrode on the substrate where the auxiliary wiring pattern is disposed, by a coating method; planarizing an upper surface of the first electrode; disposing a passivation layer on the first electrode to overlap an area of the auxiliary wiring pattern; disposing a light emission structure on the first electrode; and disposing a second electrode on the light emission structure. ### Claim 11 (depends on 10) The method of claim 10, wherein the auxiliary wiring pattern forming material includes a first auxiliary wiring pattern forming material and a second auxiliary wiring pattern forming material, the first auxiliary wiring pattern forming material includes a metal material, and the second auxiliary wiring pattern forming material includes an uncrystallized transparent conductive oxide material, the forming of the auxiliary wiring pattern includes the forming of the first auxiliary wiring pattern from the first auxiliary wiring pattern forming material and the forming of the second auxiliary wiring pattern from the second auxiliary wiring pattern forming material, and the forming of the first auxiliary wiring pattern and the second auxiliary wiring pattern comprises: disposing a mask having an opening on the uncrystallized transparent conductive oxide; crystallizing the uncrystallized transparent conductive oxide in the opening portion of the mask by irradiating a laser beam to the mask; removing the mask; and etching the uncrystallized transparent conductive oxide and the first auxiliary wiring pattern forming material under the uncrystallized transparent conductive oxide at corresponding locations of the removed mask. ### Claim 12 A lighting device including an array area and a pad area, the device comprising: a substrate; a plurality of auxiliary wiring pattern on the substrate, the plurality of auxiliary wiring patterns spaced apart from each other; a first electrode on at least one of the plurality of auxiliary wiring patterns; a passivation layer on at least one of the plurality of the auxiliary wiring patterns, the passivation layer including a plurality of portions spaced apart from each other; and a light emission structure on the first electrode in the array area. ### Claim 13 (depends on 12) The lighting device of claim 12, wherein the plurality of auxiliary wiring patterns includes a first auxiliary wiring pattern and a second auxiliary wiring pattern, the first auxiliary wiring pattern is on the substrate and the second auxiliary wiring pattern is on the first auxiliary wiring pattern, wherein the pad area is spaced apart from the light emission structure in the array area, and a first portion of the plurality of portions of the passivation layer being on the first auxiliary wiring pattern and the second auxiliary wiring pattern in the pad area. ### Claim 14 (depends on 12) The lighting device of claim 12, at least one of the plurality of portions of the passivation layer overlapping at least one of the plurality of auxiliary wiring patterns. ### Claim 15 (depends on 12) The lighting device of claim 12, at least one of the plurality of portions of the passivation layer being on the first electrode and overlapping at least one of the plurality of auxiliary wiring patterns and extending to a first surface of the first electrode. ### Claim 16 (depends on 15) The lighting device of claim 15, wherein the first surface of the first electrode includes a side surface transverse from a top surface of the first electrode, the top surface of the first electrode including a planar surface. ### Claim 17 (depends on 13) The lighting device of claim 13, further comprising: a second electrode on the first portion of the passivation layer in the pad area, wherein the second electrode overlaps the first auxiliary wiring pattern and the second auxiliary wiring pattern, and the second electrode contacts a portion of the second auxiliary wiring pattern. ### Claim 18 (depends on 14) The lighting device of claim 14, further comprising: a second electrode on the light emission structure, wherein the second electrode overlaps at least one of the plurality of portions of the passivation layer and at least one of the plurality of auxiliary wiring patterns. ### Claim 19 (depends on 15) The lighting device of claim 15, further comprising: a buffer layer on the substrate, the buffer layer being between the substrate and the plurality of auxiliary wiring patterns; and a second electrode on the light emission structure, the passivation layer and the buffer layer, wherein the second electrode covers a second surface of the at least one of the plurality of portions of the passivation layer, and contacts the buffer layer. ### Claim 20 (depends on 19) The lighting device of claim 19, wherein the second surface of the at least one of the plurality of portions of the passivation layer includes a side surface transverse from a top surface of the passivation layer, the top surface of the passivation layer including a planar surface.