# US 12,120,907 B2 · Electroluminescent display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,907 B2 - Document ID: US12120907B2 - Status: Granted - Kind: B2 - Application number: 16/703,139 - Filed: 2019-12-04 - Published: 2020-06-11 - Granted: 2024-10-15 - Earliest claimed: 2018-12-05 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Wonjin Choi; GeeSung Chae - Web page: https://patentgrep.com/patent/US12120907B2 ## CPC - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K 2102/00: Constructional details relating to the organic devices covered by this subclass - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An electroluminescent display apparatus includes a substrate, a plurality of light emitting elements disposed on a flexible substrate, and an encapsulating unit disposed on the plurality of light emitting elements. The encapsulating unit includes a first encapsulating layer, a second encapsulating layer, and a third encapsulating layer, and at least one of the first encapsulating layer, the second encapsulating layer, and the third encapsulating layer is patterned to have a plurality of patterns which are isolated and independent from each other. ## Claims ### Claim 1 An electroluminescent display apparatus, comprising: a substrate including an active area in which a pixel is disposed and a non-active area enclosing an outer periphery of an edge of the active area; a thin film transistor disposed on the active area of the substrate; a planarization layer disposed on the thin film transistor; a light emitting element disposed on the planarization layer and including an anode, an organic light emitting layer, and a cathode; and an encapsulating unit disposed on the light emitting element, wherein the encapsulating unit includes a first encapsulating layer, a second encapsulating layer, and a third encapsulating layer, wherein the second encapsulating layer is engulfed in between the first encapsulating layer and the third encapsulating layer to prevent the second encapsulating layer from being connected to a corresponding second encapsulating layer of an adjacent light emitting element, wherein the first encapsulating layer and the third encapsulating layer include silicon oxide SiOx or silicon nitride SiNx, wherein the second encapsulating layer includes one of silicon oxycarbide (SiOCz), acryl, epoxy based resin, silicon oxide SiOx or silicon nitride SiNx, wherein a barrier film configured as a film having translucency and both-sided adhesiveness, is further disposed on the third encapsulating layer, wherein the encapsulating unit is disposed on the cathode without engulfing the cathode, and wherein the active area is configured to emit light through the thin film transistor and the light emitting element. ### Claim 2 (depends on 1) The electroluminescent display apparatus according to claim 1, wherein the first encapsulating layer and the third encapsulating layer are in contact with each other at an end and engulf the second encapsulating layer therein. ### Claim 3 (depends on 1) The electroluminescent display apparatus according to claim 1, wherein the first encapsulating layer is disposed on each of a plurality of light emitting elements and has a plurality of patterns which are isolated and independent from each other and the second encapsulating layer and the third encapsulating layer are extended to cover the plurality of patterns of the first encapsulating layer. ### Claim 4 (depends on 3) The electroluminescent display apparatus according to claim 3, wherein each of the plurality of patterns has an island shape. ### Claim 5 (depends on 3) The electroluminescent display apparatus according to claim 3, wherein the plurality of patterns are disposed on the plurality of light emitting elements in one-to-one correspondence. ### Claim 6 (depends on 3) The electroluminescent display apparatus according to claim 3, wherein each of the plurality of patterns covers at least one light emitting element among the plurality of light emitting elements. ### Claim 7 An electroluminescent display apparatus, comprising: a substrate including an active area in which a pixel is disposed and a non-active area enclosing an outer periphery of an edge of the active area; a thin film transistor disposed on the active area of the substrate; a planarization layer disposed on the thin film transistor; a light emitting element disposed on the planarization layer and including an anode, an organic light emitting layer, and a cathode; and an encapsulating unit disposed on the light emitting element, wherein the encapsulating unit includes a first encapsulating layer, a second encapsulating layer, and a third encapsulating layer, wherein the second encapsulating layer is engulfed in between the first encapsulating layer and the third encapsulating layer to prevent the second encapsulating layer from being connected to a corresponding second encapsulating layer of an adjacent light emitting element, wherein the first encapsulating layer has a plurality of patterns which are separated apart from the first encapsulating layer, the second encapsulating layer and the third encapsulating layer of adjacent encapsulating units, wherein the first encapsulating layer and the third encapsulating layer include silicon oxide SiOx or silicon nitride SiNx, wherein the second encapsulating layer includes one of silicon oxycarbide (SiOCz), acryl, epoxy based resin, silicon oxide SiOx or silicon nitride SiNx, wherein a barrier film configured as a film having translucency and both-sided adhesiveness, is further disposed on the third encapsulating layer, wherein the encapsulating unit is disposed on the cathode without engulfing the cathode, and wherein the active area is configured to emit light through the thin film transistor and the light emitting element. ### Claim 8 (depends on 7) The electroluminescent display apparatus according to claim 7, wherein each of the first encapsulating layer, the second encapsulating layer, and the third encapsulating layer has a plurality of patterns which are isolated and independent from each other, and the first encapsulating layer and the third encapsulating layer are in contact with each other at an end and engulf the second encapsulating layer therein. ### Claim 9 (depends on 7) The electroluminescent display apparatus according to claim 7, wherein the second encapsulating layer and the third encapsulating layer are extended to cover the plurality of patterns of the first encapsulating layer. ### Claim 10 (depends on 7) The electroluminescent display apparatus according to claim 7, wherein each of the plurality of patterns has an island shape. ### Claim 11 (depends on 7) The electroluminescent display apparatus according to claim 7, wherein the plurality of patterns are disposed on the plurality of light emitting elements in one-to-one correspondence. ### Claim 12 (depends on 7) The electroluminescent display apparatus according to claim 7, wherein each of the plurality of patterns covers at least one light emitting element among the plurality of light emitting elements.