# US 11,029,557 B2 · Optical laminate film and organic electroluminescent display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,557 B2 - Document ID: US11029557B2 - Status: Granted - Kind: B2 - Application number: 16/866,522 - Filed: 2020-05-04 - Published: 2020-08-20 - Granted: 2021-06-08 - Earliest claimed: 2017-11-08 - Assignees: FUJIFILM Corporation - Applicants: FUJIFILM Corporation - Inventors: Shinichi Yoshinari; Ayako Muramatsu; Naoya Shibata; Kunihiro Atsumi; Daisuke Kashiwagi - Web page: https://patentgrep.com/patent/US11029557B2 ## CPC - G02B 5/3016: {involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528)} - G02B 27/286: {for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another (G02B5/3083 takes precedence; light guide coupling means utilising polarising elements G02B6/34)} - G02F 1/133533: {Colour selective polarisers (G02F1/1347 takes precedence)} - G09F 9/00: Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) - G09F 9/30: in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) - H05B 33/02: Details - H10K 59/50: OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements - H10K 59/8791: {Arrangements for improving contrast, e.g. preventing reflection of ambient light} - G02F 1/133541: {Circular polarisers} - G02F 1/133543: {Cholesteric polarisers} - G02F 1/133638: {Waveplates, i.e. plates with a retardation value of lambda/n} - G02F 2201/343: cholesteric liquid crystal reflector - G02F 2203/20: Intrinsic phase difference, i.e. optical bias, of an optical modulator; Methods for the pre-set thereof - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An object of the present invention is to provide is an optical laminate film exhibiting excellent reflection tint and an organic EL display device using this optical laminate film and exhibiting excellent reflection tint when turned off. The object is achieved by providing an optical laminate film including a polarizer, a phase difference layer, and a circularly polarized light separating layer in this order, in which an in-plane retardation Re(550) of the phase difference layer is 120 to 160 nm, the polarizer and the phase difference layer are arranged to form an angle of 45°±10°, the circularly polarized light separating layer is a cholesteric liquid crystal layer formed by fixing a cholesteric liquid crystalline phase and having a liquid crystalline molecule as a main component, and Re(550) is 0.5 to 3.0 nm, and an optical laminate film in which a circularly polarized light separating layer has an in-plane phase difference and an angle formed between a slow axis of a phase difference layer and a slow axis of the circularly polarized light separating layer is −30° to 30°. ## Claims ### Claim 1 An optical laminate film comprising, at least: a polarizer; a phase difference layer; and a circularly polarized light separating layer, wherein the polarizer, the phase difference layer, and the circularly polarized light separating layer are arranged in this order, an in-plane retardation Re(550) of the phase difference layer is 120 to 160 nm, the polarizer and the phase difference layer are arranged such that an angle formed between a transmission axis of the polarizer and a slow axis of the phase difference layer is 45°±10°, the circularly polarized light separating layer is a cholesteric liquid crystal layer formed by fixing a cholesteric liquid crystalline phase, and an in-plane retardation Re(550) of the cholesteric liquid crystal layer is 0.5 to 3.0 nm. ### Claim 2 (depends on 1) The optical laminate film according to claim 1, wherein the circularly polarized light separating layer is formed of a disk-like liquid crystal compound. ### Claim 3 (depends on 1) The optical laminate film according to claim 1, wherein a selective reflection center wavelength of the circularly polarized light separating layer is in a range of 430 to 480 nm. ### Claim 4 (depends on 1) The optical laminate film according to claim 1, wherein a selective reflection center wavelength of the circularly polarized light separating layer is in a range of 700 to 800 nm. ### Claim 5 (depends on 1) The optical laminate film according to claim 1, wherein the phase difference layer exhibits reciprocal wavelength dispersibility. ### Claim 6 (depends on 1) The optical laminate film according to claim 1, wherein the number of spiral turns of the circularly polarized light separating layer is 1.5 to 6.5. ### Claim 7 (depends on 1) An organic electroluminescent display device comprising: the optical laminate film according to claim 1; and an organic electroluminescent light emitting element, wherein the optical laminate film and the organic electroluminescent light emitting element are arranged so as to sandwich the circularly polarized light separating layer between the phase difference layer and the organic electroluminescent light emitting element. ### Claim 8 (depends on 7) The organic electroluminescent display device according to claim 7, wherein a total of retardations Rth(550) in a thickness direction of members arranged between the polarizer and the organic electroluminescent light emitting element is −50 to 50 nm. ### Claim 9 (depends on 7) The organic electroluminescent display device according to claim 7, further comprising: a C-plate between the polarizer and the organic electroluminescent light emitting element. ### Claim 10 An optical laminate film comprising, at least: a polarizer; a phase difference layer; and a circularly polarized light separating layer, wherein the polarizer, the phase difference layer, and the circularly polarized light separating layer are arranged in this order, an in-plane retardation Re(550) of the phase difference layer is 120 to 160 nm, the polarizer and the phase difference layer are arranged such that an angle formed between a transmission axis of the polarizer and a slow axis of the phase difference layer is 45°+10°, the circularly polarized light separating layer is a cholesteric liquid crystal layer formed by fixing a cholesteric liquid crystalline phase, the circularly polarized light separating layer has an in-plane phase difference, and an angle formed between a slow axis of the phase difference layer and a slow axis of the circularly polarized light separating layer is −30° to 30°. ### Claim 11 (depends on 10) The optical laminate film according to claim 10, wherein the circularly polarized light separating layer is formed of a disk-like liquid crystal compound. ### Claim 12 (depends on 10) The optical laminate film according to claim 10, wherein a selective reflection center wavelength of the circularly polarized light separating layer is in a range of 430 to 480 nm. ### Claim 13 (depends on 10) The optical laminate film according to claim 10, wherein a selective reflection center wavelength of the circularly polarized light separating layer is in a range of 700 to 800 nm. ### Claim 14 (depends on 10) The optical laminate film according to claim 10, wherein the phase difference layer exhibits reciprocal wavelength dispersibility. ### Claim 15 (depends on 10) The optical laminate film according to claim 10, wherein the number of spiral turns of the circularly polarized light separating layer is 1.5 to 6.5. ### Claim 16 (depends on 10) An organic electroluminescent display device comprising: the optical laminate film according to claim 10; and an organic electroluminescent light emitting element, wherein the optical laminate film and the organic electroluminescent light emitting element are arranged so as to sandwich the circularly polarized light separating layer between the phase difference layer and the organic electroluminescent light emitting element. ### Claim 17 (depends on 16) The organic electroluminescent display device according to claim 16, wherein a total of retardations Rth(550) in a thickness direction of members arranged between the polarizer and the organic electroluminescent light emitting element is −50 to 50 nm. ### Claim 18 (depends on 16) The organic electroluminescent display device according to claim 16, further comprising: a C-plate between the polarizer and the organic electroluminescent light emitting element.