# US 2018/0321554 A1 · Mirror surface display device and light reflecting and transmitting member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0321554 A1 - Document ID: US20180321554A1 - Status: Published application - Kind: A1 - Application number: 16/038,905 - Filed: 2018-07-18 - Published: 2018-11-08 - Earliest claimed: 2016-01-20 - Assignees: AGC Inc. - Applicants: AGC Inc. - Inventors: Satoshi NIIYAMA - Web page: https://patentgrep.com/patent/US20180321554A1 ## CPC - 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 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)} - G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00) - G02B 5/3083: {Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001)} - G02F 1/13: based on liquid crystals, e.g. single liquid crystal display cells - G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - G02F 1/133528: {Polarisers} - 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 9/35: being liquid crystals (G09F9/302 takes precedence; liquid crystal materials C09K19/00; {liquid crystal panels comprising a number of electrodes in a single cell per se G02F1/13}) - G09F 13/12: using a transparent mirror or other light reflecting surface transparent to transmitted light whereby a sign, symbol, picture or other is visible only when illuminated - G02F 1/133354: {Arrangements for aligning or assembling substrates} - G02F 1/133536: {Reflective polarizers (G02F1/13362 takes precedence)} - G02F 1/133543: {Cholesteric polarisers} - G02F 1/133638: {Waveplates, i.e. plates with a retardation value of lambda/n} - 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 ## Abstract Each of a mirror surface display device and a light reflecting member includes a support member having an optical thin film thereon, a broadband selective reflection film and a display in this order; the optical thin film being formed on a surface of the support member facing the broadband selective reflection film; and the broadband selective reflection film being a film selectively transmitting one of clockwise circularly polarized light and counterclockwise circularly polarized light, and selectively reflecting the other polarized light, and having cholesteric regularity. ## Claims ### Claim 1 A mirror surface display device comprising a support member having an optical thin film thereon, a broadband selective reflection film and a display in this order; the optical thin film being formed on a surface of the support member facing the broadband selective reflection film; and the broadband selective reflection film being a film selectively transmitting one of clockwise circularly polarized light and counterclockwise circularly polarized light, and selectively reflecting the other polarized light, and having cholesteric regularity. ### Claim 2 (depends on 1) The mirror surface display device according to claim 1, wherein a ray of display incident on the broadband selective reflection film from the display comprises circularly polarized light having the same circling direction as circularly polarized light that is allowed to selectively pass through the broadband selective reflection film. ### Claim 3 (depends on 1) The mirror surface display device according to claim 1, wherein the support member and the broadband selective reflection film have a larger area than the display; and the broadband selective reflection film has a light-shielding layer in a region that does not face the display. ### Claim 4 (depends on 3) The mirror surface display device according to claim 3, wherein the broadband selective reflection film and the display face each other via an air layer; and the light-shielding layer faces, via an air layer, the region that does not face the display. ### Claim 5 (depends on 3) The mirror surface display device according to claim 3, wherein the broadband selective reflection film and the display are bonded together via a second transparent bonding material, and the light-shielding layer is formed, not via the air layer, on the broadband selective reflection film in the region that does not face the display. ### Claim 6 (depends on 4) The mirror surface display device according to claim 4, further comprising a retardation film interposed between the broadband selective reflection film and the light-shielding layer. ### Claim 7 (depends on 1) The mirror surface display device according to claim 1, wherein the broadband selective reflection film and the support member are bonded together via a first transparent bonding material, and the first transparent bonding material has a smaller thickness than a pitch of display pixels of the display. ### Claim 8 (depends on 5) The mirror surface display device according to claim 5, wherein each of the first transparent bonding material and the second transparent bonding material has a refractive index of 0.8 to 1.3 times that of the support member, and a shear elastic modulus of 103 to 107 Pa at 25° C. ### Claim 9 (depends on 1) The mirror surface display device according to claim 1, wherein the support member is made of a transparent material having a transmission of at least 20% in a visible light band. ### Claim 10 (depends on 1) The mirror surface display device according to claim 1, wherein the support member is made of inorganic glass. ### Claim 11 (depends on 1) The mirror surface display device according to claim 1, wherein the display comprises a liquid crystal display, and the liquid crystal display includes a liquid crystal display panel and a light source for emitting light to the liquid crystal display panel, the liquid crystal display panel having a liquid crystal layer interposed between paired substrates, and paired polarizing plates formed on both outside principal faces of the liquid crystal display panel. ### Claim 12 (depends on 1) The mirror surface display device according to claim 1, wherein the optical thin film includes a dielectric multilayer film and has a light reflectance of at least 60% for a wavelength of 550 nm. ### Claim 13 (depends on 1) The mirror surface display device according to claim 1, wherein the broadband selective reflection film has a reflection band in wavelength of at least 150 nm. ### Claim 14 A light reflecting and transmitting member comprising a support member having an optical thin film thereon, and a broadband selective reflection film in this order; and the optical thin film being formed on a surface of the support member facing the broadband selective reflection film; the broadband selective reflection film being a film selectively transmitting one of clockwise circularly polarized light and counterclockwise circularly polarized light, and selectively reflecting the other polarized light, and having cholesteric regularity. ### Claim 15 (depends on 14) A window member using the light reflecting and transmitting member claimed in claim 14.