# US 2018/0025668 A1 · Starry sky reproducing sheet and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0025668 A1 - Document ID: US20180025668A1 - Status: Published application - Kind: A1 - Application number: 15/550,253 - Filed: 2016-02-12 - Published: 2018-01-25 - Earliest claimed: 2015-02-12 - Inventors: Yasufumi Mase - Web page: https://patentgrep.com/patent/US20180025668A1 ## CPC - G09B 27/00: Planetaria; Globes - G09B 5/02: with visual presentation of the material to be studied, e.g. using film strip - G09F 13/005: {Illumination controller or illuminated signs including an illumination control system} - G09F 13/02: Signs, boards, or panels, illuminated by artificial light sources positioned in front of the insignia - G09F 13/04: Signs, boards or panels, illuminated from behind the insignia - G09F 13/22: electroluminescent (electroluminescent light sources per se H05B33/00) - G09F 19/18: involving the use of optical projection means, e.g. projection of images on clouds (projection apparatus per se G03B) - G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B) - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS ## Abstract [Technical Problem] It was difficult to replicate the wide-ranging brightness magnitude of tiny stars through the starry sky reproduction apparatus to replicate the whole sky with details as deeply as the observation through astronomical telescopes. [Solution to Problem] According to the present invention, the starry sky reproduction apparatus is a laminating sheet that is pasted up N layers (N≧2) of light reducing effect sheet. Under the condition that M and L is integer number, magnitude is N≧M>L≧1, and when the laminating sheet is stacked L layers, the L-Layer light transmittable through hole will be formed. Light beam can go over the sheet passing through the hole. Additionally, M-Layer light transmittable through hole is formed under the condition that the laminating sheet is stacked M layers, and the hole is located in the different position of the L-Layer light transmittable through hole, then the L layer-transit beam, which passes through the L-Layer light transmittable through hole, and the M layer-transit beam, which passes through the M-Layer light transmittable through hole, can be observed as 2 different transmitted light with different brightness magnitude. That can be happened with the difference of the light redaction-ratio between the L and M beams. ## Claims ### Claim 1 A starry sky reproducing sheet, comprising N laminated light reducing sheets stuck together, each of which has homogeneous light reducing effects (where N is two or larger); the starry sky reproducing sheet comprising, with M and L being two mutually different integers that are one or larger and N or smaller (M>L): L-layer transmission holes that are formed through L light reducing sheets stuck together, so that light beams pass therethrough; and M-layer transmission holes that are formed through M light reducing sheets stuck together including the L light reducing sheets at different positions from the L-layer transmission holes; wherein light beams incident on one face of the starry sky reproducing sheet pass through the L- and M-layer transmission holes while being attenuated at mutually different light reduction ratios to become L- and M-layer transmitted beams respectively which are visibly recognizable as transmitted-light stars having mutually different brightnesses. ### Claim 2 (depends on 15) The starry sky reproducing device according to claim 15, wherein the device comprises: a plurality of light emitting elements; light-emitting element lighting control means that controls lighting of the light emitting elements; and a plurality of optical fibers that are disposed on the back side of the starry sky reproducing sheet and through the starry sky reproducing sheet, and that lead light incident on ends of the fibers from the light emitting elements to the observer side of the starry sky reproducing sheet; wherein the transmitted-light stars and light-emitting element stars that are produced by the light led by the optical fibers from the light emitting elements can be observed by an observer simultaneously; and wherein, when the light-emitting element stars have an average intensity of A and the transmitted-light stars have an average intensity of B, A>B holds. ### Claim 3 (depends on 15) The starry sky reproducing device according to claim 15, wherein the device comprises: a UV lamp that illuminates the observer side surface of the laminated sheet with ultraviolet light; and UV-lamp lighting control means that controls lighting of the UV lamp; wherein the starry sky reproducing sheet comprises a printed surface on the observer side surface thereof on which stellar images are printed with a fluorescent ink that emits light by being illuminated with ultraviolet light; wherein printed luminous stars that are produced by the fluorescent ink emitting light by being illuminated with the UV lamp and the transmitted-light stars can be observed by an observer simultaneously; and wherein, when the transmitted-light stars have an average intensity of B and the printed luminous stars have an average intensity of C, B>C holds. ### Claim 4 (depends on 15) The starry sky reproducing device according to claim 15, wherein the device comprises a projector that can project an image on the observer side surface of the starry sky reproducing sheet. ### Claim 5 (depends on 15) The starry sky reproducing device according to claim 15, wherein the device comprises: a display that can display an image on a surface thereof; and a transmitting reflection plate that enables simultaneous observation of the image on the display and the light from the starry sky reproducing sheet by reflecting light from display elements producing the image and by transmitting the light from the starry sky reproducing sheet. ### Claim 6 (depends on 15) The starry sky reproducing device according to claim 15, wherein the device comprises: an approximately planar illumination panel, as the back light source, comprising transmission-light emitting elements that generate backside illumination light for the starry sky reproducing sheet; and illumination panel lighting control means that can change light intensity from the illumination panel; wherein the illumination panel can illuminate the back side of the starry sky reproducing sheet with light of variable intensity by being disposed close to the starry sky reproducing sheet. ### Claim 7 (depends on 6) The starry sky reproducing device according to claim 6, wherein the device comprises sheet installation means that installs the starry sky reproducing sheet on the illumination panel in an exchangeable manner. ### Claim 8 (depends on 2) The starry sky reproducing device according to claim 2, wherein the device comprises: a base frame that the plurality of light emitting elements and the light-emitting element lighting control means are fixed to; and sheet installation means that installs the starry sky reproducing sheet on the base frame in a removable manner; wherein the starry sky reproducing sheet installation means is configured to align incidence ends of the optical fibers at positions facing light emitting planes of the light emitting elements according to predetermined correspondence between the light emitting elements and the optical fibers upon installation of the starry sky reproducing sheet. ### Claim 9 (depends on 2) The starry sky reproducing device according to claim 2, wherein the device comprises: an approximately planar illumination panel, as the back light source, comprising transmission-light emitting elements that generate backside illumination light for the starry sky reproducing sheet; and an illumination panel lighting control means that can change light intensity from the illumination panel; wherein the illumination panel can illuminate the back side of the starry sky reproducing sheet with light of variable intensity by being disposed close to the starry sky reproducing sheet; and wherein the light-emitting element lighting control means or the illumination panel lighting control means works to achieve a predetermined balance of brightness observed by the observer between the transmitted-light stars and the light-emitting element stars. ### Claim 10 (depends on 3) The starry sky reproducing device according to claim 3, wherein the device comprises: an approximately planar illumination panel, as the back light source, comprising transmission-light emitting elements that generate backside illumination light for the starry sky reproducing sheet; and an illumination panel lighting control means that can change light intensity from the illumination panel; wherein the illumination panel can illuminate the back side of the starry sky reproducing sheet with light of variable intensity by being disposed close to the starry sky reproducing sheet; and wherein the UV-lamp lighting control means or the illumination panel lighting control means works to achieve a predetermined balance of brightness observed by the observer between the transmitted-light stars and the printed luminous stars. ### Claim 11 (depends on 1) The starry sky reproducing sheet according to claim 1, wherein the sheet comprises holes to insert ends of optical fibers therethrough and fix them. ### Claim 12 (depends on 1) The starry sky reproducing sheet according to claim 1, wherein the sheet comprises a printed surface on its observer side surface on which stellar images are printed with a fluorescent ink that emits light by being illuminated with ultraviolet light. ### Claim 13 (depends on 11) The starry sky reproducing sheet according to claim 11, wherein the sheet comprises a printed surface on its observer side surface on which stellar images are printed with a fluorescent ink that emits light by being illuminated with ultraviolet light. ### Claim 14 (depends on 1) The starry sky reproducing sheet according to claim 1, wherein an image can be projected by a projector on an observer side surface of the starry sky reproducing sheet. ### Claim 15 (depends on 1) A starry sky reproducing device, comprising: the starry sky reproducing sheet according to claim 1; and a back light source that illuminates the sheet from its back side opposite to an observer side. ### Claim 16 (depends on 2) The starry sky reproducing device according to claim 2, wherein the device comprises: a UV lamp that illuminates the observer side surface of the laminated sheet with ultraviolet light; and UV-lamp lighting control means that controls lighting of the UV lamp; wherein the starry sky reproducing sheet comprises a printed surface on the observer side surface thereof on which stellar images are printed with a fluorescent ink that emits light by being illuminated with ultraviolet light; wherein printed luminous stars that are produced by the fluorescent ink emitting light by being illuminated with the UV lamp and the transmitted-light stars can be observed by an observer simultaneously; and wherein, when the transmitted-light stars have an average intensity of B and the printed luminous stars have an average intensity of C, B>C holds.