# US 12,004,377 B2 · Transparent display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,377 B2 - Document ID: US12004377B2 - Status: Granted - Kind: B2 - Application number: 17/526,309 - Filed: 2021-11-15 - Published: 2022-03-10 - Granted: 2024-06-04 - Earliest claimed: 2017-10-31 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Hyunju Jung - Web page: https://patentgrep.com/patent/US12004377B2 ## CPC - H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics} - H10K 59/121: characterised by the geometry or disposition of pixel elements - H10K 59/1213: {the pixel elements being TFTs} - H10K 59/1216: {the pixel elements being capacitors} - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/80522: {combined with auxiliary electrodes} - H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants} - H10K 59/873: {Encapsulations} - H10D 86/481: {integrated with passive devices, e.g. auxiliary capacitors} - H10D 86/60: wherein the TFTs are in active matrices - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K 59/80516: {combined with auxiliary electrodes, e.g. ITO layer combined with metal lines} - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract Disclosed is a transparent display apparatus. The transparent display apparatus includes a first substrate including a plurality of pixel areas, a first partition wall surrounding each of the plurality of pixel areas, a filling layer covering the first partition wall and the plurality of pixel areas, and a second substrate coupled to the filling layer. Accordingly, a stress applied to a display panel is reduced, and the peeling of an organic light emitting device and transmission of water are preventing from being spread, thereby enhancing the reliability of the display panel. ## Claims ### Claim 1 A transparent display apparatus, comprising: a first substrate having thereon an emission part and a transmission part adjacent to the emission part; a subpixel provided in the emission part of the first substrate; a first partition wall adjacent to the subpixel and the transmission part; a second substrate opposite the first substrate; and a bank layer on the first substrate, the bank layer having a first bank layer portion and a second bank layer portion spaced apart from the first bank layer portion, the first bank layer portion having a first dimension that decreases as it extends toward the second substrate; wherein the first partition wall is on the first bank layer portion, the first partition wall including: a base partition wall on the first bank layer portion; and a protrusion partition wall on the base partition wall, wherein the base partition wall has a second dimension that increases as it extends toward the second substrate, wherein the protrusion partition wall has a third dimension that increases as it extends toward the second substrate, wherein the base partition wall and the protrusion partition wall are separate and distinct structures, and wherein the protrusion partition wall has a reverse tapered structure and the base partition wall has a reverse tapered structure. ### Claim 2 (depends on 1) The transparent display apparatus of claim 1, further comprising: an organic light emitting layer on the second bank layer portion and extending towards the first bank layer portion; and a separation space between a first end of the first bank layer portion and a second end of the organic light emitting layer, wherein the first end of the first bank layer is facing the second end of the organic light emitting layer. ### Claim 3 (depends on 2) The transparent display apparatus of claim 2, wherein the second dimension of the base partition wall completely overlaps with the separation space. ### Claim 4 (depends on 2) The transparent display apparatus of claim 2, wherein the third dimension of the protrusion partition wall partially overlaps with the separation space. ### Claim 5 (depends on 2) The transparent display apparatus of claim 2, further comprising: a conductive layer on the organic light emitting layer and extending over the separation space to contact the first bank layer portion. ### Claim 6 (depends on 5) The transparent display apparatus of claim 5, wherein conductive layer is spaced apart from the base partition wall. ### Claim 7 (depends on 5) The transparent display apparatus of claim 5, wherein the protrusion partition wall is above the conductive layer. ### Claim 8 (depends on 2) The transparent display apparatus of claim 2, wherein the organic light emitting layer is on the base partition wall and the protrusion partition wall. ### Claim 9 (depends on 8) The transparent display apparatus of claim 8, further comprising a second conductive layer on the organic light emitting layer, the base partition wall, and the protrusion partition wall. ### Claim 10 (depends on 2) The transparent display apparatus of claim 2, further comprising: a thin film transistor provided in the emission part; a planarization layer provided on the thin film transistor; and an organic light emitting device provided on the planarization layer and electrically coupled to the thin film transistor. ### Claim 11 (depends on 10) The transparent display apparatus of claim 10, wherein the organic light emitting device comprises: an auxiliary electrode coupled to a source electrode of the thin film transistor; an anode electrode coupled to the auxiliary electrode; the organic light emitting layer provided on the anode electrode; and a cathode electrode provided in the emission part and the transmission part, and on the organic light emitting layer. ### Claim 12 (depends on 2) The transparent display apparatus of claim 2, further comprising: a first conductive layer between the first substrate and the bank layer; and a second conductive layer on the organic light emitting layer and on the first conductive layer, the second conductive layer extending over the separation space to contact the first bank layer portion. ### Claim 13 (depends on 12) The transparent display apparatus of claim 12, wherein the second conductive layer directly contacts the first conductive layer at the separation space. ### Claim 14 (depends on 1) The transparent display apparatus of claim 1, further comprising a second subpixel adjacent to the subpixel in a first direction, wherein the first partition wall is disposed between the subpixel, the second subpixel, and the transmission part. ### Claim 15 (depends on 14) The transparent display apparatus of claim 14, further comprising a third subpixel adjacent to the subpixel in a second direction transverse to the first direction, wherein the first partition wall respectively surrounds the transmission part and each of the subpixel, the second subpixel, and the third subpixel. ### Claim 16 (depends on 1) The transparent display apparatus of claim 1, wherein the first bank layer portion having a first surface, a second surface extending from the first surface towards the first substrate, a third surface opposite the second surface extending from the first surface toward the first substrate, wherein the first surface completely contacts the base partition wall, wherein the second surface partially contacts the base partition wall, and wherein the third surface partially contacts the base partition wall. ### Claim 17 (depends on 1) The transparent display apparatus of claim 1, further comprising: a filling layer between the first substrate and the second substrate; and a second partition wall on the second substrate, the second partition wall opposite of the first partition wall, wherein the filling layer is between the protrusion partition wall of the first partition wall and the second partition wall. ### Claim 18 (depends on 1) The transparent display apparatus of claim 1, further comprising a second partition wall on the second substrate, the second partition wall opposite the first partition wall, the second partition wall includes a first portion contacting the second substrate, and a second portion contacting the first portion, and wherein the first portion has a reverse tapered structure and the second portion has a tapered structure. ### Claim 19 A transparent display apparatus, comprising: a first substrate having thereon an emission part and a transmission part adjacent to the emission part; a subpixel provided in the emission part of the first substrate; a first partition wall adjacent to the subpixel and the transmission part; a second substrate opposite the first substrate; and a bank layer on the first substrate, the bank layer having a first bank layer portion and a second bank layer portion spaced apart from the first bank layer portion, the first bank layer portion having a first dimension that decreases as it extends toward the second substrate; wherein the first partition wall is on the first bank layer portion, the first partition wall including: a base partition wall on the first bank layer portion; and a protrusion partition wall on the base partition wall, wherein the base partition wall has a second dimension that increases as it extends toward the second substrate, wherein the protrusion partition wall has a third dimension that increases as it extends toward the second substrate, wherein third dimension of the protrusion partition wall includes a width of the protrusion partition wall and the second dimension of the base partition wall includes a width of the base partition wall, the width of the protrusion partition wall is smaller than any width of the base partition wall. ### Claim 20 A transparent display apparatus, comprising: a first substrate having thereon an emission part and a transmission part adjacent to the emission part; a subpixel provided in the emission part of the first substrate; a first partition wall adjacent to the subpixel and the transmission part; a second substrate opposite the first substrate; and a bank layer on the first substrate, the bank layer having a first bank layer portion and a second bank layer portion spaced apart from the first bank layer portion, the first bank layer portion having a first dimension that decreases as it extends toward the second substrate; wherein the first partition wall is on the first bank layer portion, the first partition wall including: a base partition wall on the first bank layer portion, the base partition wall having a first surface opposite of and facing the second substrate; and a protrusion partition wall on the base partition wall, the protrusion partition wall having a second surface contacting the first surface of the base partition wall, wherein the base partition wall has a second dimension that increases as it extends toward the second substrate, wherein the protrusion partition wall has a third dimension that increases as it extends toward the second substrate, wherein the second dimension of the base partition wall at the first surface is greater than the third dimension of the protrusion partition wall at the second surface.