# US 10,312,473 B2 · Organic light emitting display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,473 B2 - Document ID: US10312473B2 - Status: Granted - Kind: B2 - Application number: 15/832,010 - Filed: 2017-12-05 - Published: 2018-06-07 - Granted: 2019-06-04 - Earliest claimed: 2016-12-06 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Donghoon Kim; Dongchan Kim; Wonjong Kim; Wonmin Yun; Byoungduk Lee; Jihye Lee; Sanghoon Yim; Yoonhyeung Cho; Youngcheol Joo; Wonsuk Han - Web page: https://patentgrep.com/patent/US10312473B2 ## CPC - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 59/126: Shielding, e.g. light-blocking means over the TFTs - H10K 59/878: {comprising reflective means} - H10K 59/879: {comprising refractive means, e.g. lenses} - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An organic light emitting display device includes: a substrate; an organic light emitting element on the substrate; and a thin film encapsulation layer on the organic light emitting element. The thin film encapsulation layer includes a first thin film, a second thin film and a third thin film which are sequentially stacked therein, a refractive index of the second thin film is about 1.7 or greater, and a refractive index of the first thin film and a refractive index of the third thin film are greater than the refractive index of the second thin film by about 0.35 or greater. ## Claims ### Claim 1 An organic light emitting display device comprising: a substrate; an organic light emitting element on the substrate; a thin film encapsulation layer on the organic light emitting element; and wherein the thin film encapsulation layer comprises a first thin film, a second thin film and a third thin film, which are sequentially stacked therein, a refractive index of the second thin film is about 1.7 or greater, each of the refractive index of the first thin film and the refractive index of the third thin film is about 2.3 or greater, and a refractive index of the first thin film and a refractive index of the third thin film are greater than the refractive index of the second thin film by about 0.35 or greater. ### Claim 2 (depends on 1) The organic light emitting display device of claim 1, wherein the refractive index of the second thin film is about 2.3 or less. ### Claim 3 (depends on 2) The organic light emitting display device of claim 2, wherein the second thin film comprises at least one of Nd2O3, Gd2O3, Sm2O3, Sc2O3, Y2O3, SiO, TiO2, ZrO2+Y2O3, ZrO2 and SnO2. ### Claim 4 (depends on 1) The organic light emitting display device of claim 1, wherein each of the first thin film and the third thin film comprises at least one of ZrO2+TiO2, Cr2O3, ZnO, Ta2O5, TiO2+T2O5, Sb2O3, ZnS, CuO, Fe2O3, and Si. ### Claim 5 (depends on 1) The organic light emitting display device of claim 1, wherein each of the first thin film, the second thin film, and the third thin film has a thickness of about 60 nm or less. ### Claim 6 (depends on 1) The organic light emitting display device of claim 1, wherein a reflectance of the thin film encapsulation layer is about 20% or greater at a wavelength of about 410 nm. ### Claim 7 (depends on 6) The organic light emitting display device of claim 6, wherein a reflectance of the thin film encapsulation layer is about 5% or less at a wavelength in a range from about 500 nm to about 600 nm. ### Claim 8 (depends on 3) The organic light emitting display device of claim 3, further comprising: a monomer layer between the thin film encapsulation layer and the organic light emitting element. ### Claim 9 (depends on 8) The organic light emitting display device of claim 8, wherein the monomer layer has a thickness of about 40000 angstroms or greater. ### Claim 10 (depends on 9) The organic light emitting display device of claim 9, wherein the monomer layer comprises at least one of propargyl methacrylate, glycidyl methacrylate, pentafluorophenyl methacrylate, furfuryl methacrylate, hydroxyethyl methacrylate, vinyl pyrrolidone, dimethylaminomethyl styrene, cyclohexyl methacrylate, perfluorodecyl acrylate, trivinyltrimethyl cyclotrisiloxane, 4-aminostyrene, N-isopropylacrylamine, maleic anhydride-alt-styrene, methacrylic acid-co-ethyl acrylate, ethyleneglycol dimethacrylate, divinylbenzene, and di(ethylene glycol)divinyl ether. ### Claim 11 (depends on 1) The organic light emitting display device of claim 1, wherein at least one of the first thin film and the third thin film comprises SiON. ### Claim 12 (depends on 11) The organic light emitting display device of claim 11, wherein the second thin film comprises SiNx. ### Claim 13 (depends on 12) The organic light emitting display device of claim 12, wherein each of the first thin film, the second thin film and the third thin film has a thickness of about 60 nm or less. ### Claim 14 An organic light emitting display device comprising: a substrate; an organic light emitting element on the substrate; a thin film encapsulation layer on the organic light emitting element; and wherein the thin film encapsulation layer comprises a first thin film, a second thin film and a third thin film, which are sequentially stacked therein, a refractive index of the second thin film is about 1.7 or greater, a refractive index of the first thin film and a refractive index of the third thin film are greater than the refractive index of the second thin film, each of the refractive index of the first thin film and the refractive index of the third thin film is about 2.3 or greater, and a reflectance of the thin film encapsulation layer is about 30% or greater at a wavelength of about 780 nm. ### Claim 15 (depends on 14) The organic light emitting display device of claim 14, wherein the second thin film comprises at least one of Nd2O3, Gd2O3, Sm2O3, Sc2O3, Y2O3, SiO, TiO, ZrO2 and SnO2. ### Claim 16 (depends on 14) The organic light emitting display device of claim 14, wherein each of the first thin film and the third thin film comprises at least one of ZrO2+TiO2, Cr2O3, ZnO, Ta2O5, TiO2+T2O5, Sb2O3, ZnS, CuO, Fe2O3, and Si. ### Claim 17 (depends on 14) The organic light emitting display device of claim 14, wherein at least one of the first thin film and the third thin film comprises SiON and the second thin film comprises SiNx. ### Claim 18 (depends on 17) The organic light emitting display device of claim 17, wherein each of the first thin film, the second thin film and the third thin film has a thickness of about 60 nm or less.