# US 12,765,223 B2 · Display device including bank layer tips > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,765,223 B2 - Document ID: US12765223B2 - Status: Granted - Kind: B2 - Application number: 18/218,043 - Filed: 2023-07-04 - Published: 2024-04-11 - Granted: 2026-10-13 - Earliest claimed: 2022-10-11 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Hyun Eok Shin; Sung Joo Kwon; Ju Hyun Lee - Web page: https://patentgrep.com/patent/US12765223B2 ## CPC - H10K 59/80516: {combined with auxiliary electrodes, e.g. ITO layer combined with metal lines} - H10K 59/1201: {Manufacture or treatment} - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K 59/873: {Encapsulations} - H10K 59/8792: {comprising light absorbing layers, e.g. black layers} - H10K 50/844: Encapsulations - H10K 50/865: {comprising light absorbing layers, e.g. light-blocking layers} - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K 59/124: Insulating layers formed between TFT elements and OLED elements - H10K 59/126: Shielding, e.g. light-blocking means over the TFTs - H10K 59/40: OLEDs integrated with touch screens - H10K 2102/341: {Short-circuit prevention} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display device include first and second pixel electrodes apart from each other on a substrate, an inorganic insulating layer in part on the first and second pixel electrodes, a bank structure on the inorganic insulating layer with first and second openings defined therethrough to overlap the first and second pixel electrodes, an auxiliary layer on the first and second pixel electrodes in the first and second openings, first and second light-emitting layers on the auxiliary layer on the first and second pixel electrodes, first and second common electrodes on the first and second light-emitting layers, and an auxiliary layer pattern on the bank structure around the first and second openings. The bank structure includes first and second bank layers including different metal materials, and the second bank layer includes tips protruding from side surfaces of the first bank layer defining the first and second openings. ## Claims ### Claim 1 A display device comprising: a first pixel electrode and a second pixel electrode which are disposed on a substrate to be spaced apart from each other; an inorganic insulating layer disposed on the substrate to be in part on the first and second pixel electrodes; a bank structure disposed on the inorganic insulating layer, wherein first and second openings are defined through the bank structure to overlap the first and second pixel electrodes, respectively; an auxiliary layer disposed on the first and second pixel electrodes in the first and second openings; a first light-emitting layer and a second light-emitting layer which are disposed on the auxiliary layer on the first pixel electrode and the second pixel electrode, respectively; a first common electrode and a second common electrode which are disposed on the first light-emitting layer and the second light-emitting layer, respectively; and an auxiliary layer pattern disposed on the bank structure around the first opening and the second opening, wherein the first common electrode and the second common electrode are spaced apart from each other, the bank structure includes a first bank layer and a second bank layer, which is disposed on the first bank layer and includes a different metal material from the first bank layer, and the second bank layer includes tips, which protrude from side surfaces of the first bank layer defining the first opening and the second opening. ### Claim 2 (depends on 1) The display device of claim 1, wherein each of the auxiliary layer and the auxiliary layer pattern includes tungsten oxide (WOx). ### Claim 3 (depends on 2) The display device of claim 2, wherein each of the auxiliary layer and the auxiliary layer pattern includes tantalum oxide (TaOx). ### Claim 4 (depends on 3) The display device of claim 3, wherein each of the auxiliary layer and the auxiliary layer pattern have a TaOx content in a range of about 5 wt % to about 12 wt %. ### Claim 5 (depends on 2) The display device of claim 2, wherein each of the auxiliary layer and the auxiliary layer pattern do not include indium tin oxide (ITO). ### Claim 6 (depends on 1) The display device of claim 1, wherein the auxiliary layer is in contact with top surfaces of the first pixel electrode and the second pixel electrode. ### Claim 7 (depends on 1) The display device of claim 1, wherein the auxiliary layer is disposed at least in part on the inorganic insulating layer and is partially in contact with the side surfaces of the first bank layer. ### Claim 8 (depends on 1) The display device of claim 1, wherein the auxiliary layer pattern is disposed to surround the tips of the second bank layer and is at least partially in contact with the side surfaces of the first bank layer. ### Claim 9 (depends on 1) The display device of claim 1, wherein the first bank layer includes aluminum (Al), and the second bank layer includes titanium (Ti). ### Claim 10 (depends on 1) The display device of claim 1, wherein the first common electrode and the second common electrode are in direct contact with the side surfaces of the first bank layer. ### Claim 11 (depends on 1) The display device of claim 1, further comprising: a first organic pattern disposed on the auxiliary layer pattern to surround the first opening and including a same material as the first light-emitting layer; a first electrode pattern disposed on the first organic pattern and including a same material as the first common electrode; a second organic pattern disposed on the auxiliary layer pattern to surround the second opening and including a same material as the second light-emitting layer; and a second electrode pattern disposed on the second organic pattern and including a same material as the second common electrode. ### Claim 12 (depends on 11) The display device of claim 11, further comprising: a first inorganic layer disposed on a side surface of the bank structure defining the first opening and on the first common electrode and the first electrode pattern; and a second inorganic layer disposed on a side surface of the second opening and on the second common electrode and the second electrode pattern, wherein the first and second inorganic layers are spaced apart from each other, and part of the second bank layer does not overlap the first and second inorganic layers. ### Claim 13 (depends on 1) The display device of claim 1, further comprising: a thin-film encapsulation layer disposed on the bank structure, wherein the thin-film encapsulation layer includes a first encapsulation layer, a second encapsulation layer, which is disposed on the first encapsulation layer, and a third encapsulation layer, which is disposed on the second encapsulation layer. ### Claim 14 (depends on 13) The display device of claim 13, further comprising: a light-blocking layer disposed on the third encapsulation layer, wherein a plurality of opening holes is defined through the light-blocking layer to overlap the first opening and the second opening, and a first color filter and a second color filter which are disposed on the light-blocking layer and overlap the first opening and the second opening, respectively.