# US 10,371,883 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,883 B2 - Document ID: US10371883B2 - Status: Granted - Kind: B2 - Application number: 15/866,639 - Filed: 2018-01-10 - Published: 2018-09-20 - Granted: 2019-08-06 - Earliest claimed: 2017-03-14 - Assignees: OMRON Corporation - Applicants: OMRON Corporation - Inventors: Yoshihiko Takagi - Web page: https://patentgrep.com/patent/US10371883B2 ## CPC - G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources} - G02B 6/0036: {2-D arrangement of prisms, protrusions, indentations or roughened surfaces} - G02B 6/0076: {Stacked arrangements of multiple light guides of the same or different cross-sectional area} - G02F 1/0063: {Optical properties, e.g. absorption, reflection or birefringence (materials for non-linear optics G02F1/355)} - G02F 1/0105: {Illuminating devices} - 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 ## Abstract A display device includes a plurality of transparent display units, each unit configured to include a light emitting surface; the display units arranged spaced apart by a predetermined distance in a direction perpendicular to the light emitting surfaces such that the light emitting surfaces are parallel to each other; and each light emitting surface outputs a monochromatic grayscale image of a mutually different color. ## Claims ### Claim 1 A display device comprising: a plurality of transparent display units, each transparent display unit comprising a light emitting surface, wherein the plurality of transparent display units are arranged spaced apart by a predetermined distance in a direction perpendicular to the light emitting surfaces such that the light emitting surfaces are parallel to each other; and each light emitting surface outputs a monochromatic grayscale image of a mutually different color. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the plurality of transparent display units comprises three of the transparent display units, and the monochromatic grayscale images output by the light emitting surfaces of the three transparent display units comprise red, green, and blue grayscale images respectively. ### Claim 3 (depends on 2) The display device according to claim 2, wherein a combined image comprises a combination of the monochromatic grayscale images, and tones of the red, the green, and the blue grayscales images are set to a maximum value in at least a portion of the combined image such that the portion of the combined image appears as white light when viewed a front. ### Claim 4 (depends on 1) The display device according to claim 1, wherein each of the monochromatic grayscale images of mutually different colors output from each of the light emitting surfaces comprise a substantially identical design. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the plurality of transparent display units comprises light guide plates that direct light entering therein and cause a portion of the light to exit from the light emitting surface; and the light guide plates comprise a specific emission pattern. ### Claim 6 (depends on 5) The display device according to claim 5, further comprising: three of the light guide plates; and a plurality of light sources, wherein each light source of the plurality of light sources is optically coupled to a single light guide plate; the plurality of light sources are disposed at end surfaces of the light guide plates; and the plurality of light sources each emit red, green, and blue light to a corresponding light guide plate. ### Claim 7 (depends on 5) The display device according to claim 5, wherein each of the specific emission patterns comprises a length parallel to the light emitting surface, and a width that is perpendicular to the length; and the light guide plates manifest a tone of the monochromatic grayscale image in accordance with the width of the specific emission patterns. ### Claim 8 (depends on 5) The display device according to claim 5, wherein the each of the specific emission patterns comprises a length parallel to the light emitting surface, and a width that is perpendicular to the length; and the light guide plates manifest a tone of the monochromatic grayscale image in accordance with the length of the specific emission patterns. ### Claim 9 (depends on 5) The display device according to claim 5, wherein the light guide plates manifest a tone of the monochromatic grayscale image in accordance with a density of the specific emission patterns. ### Claim 10 (depends on 1) The display device according to claim 1, wherein the predetermined distance is no greater than 15 mm. ### Claim 11 (depends on 1) The display device according to claim 1, wherein a distance between each center of each of the plurality of transparent display units in a thickness direction thereof is no less than double a thickness of each of the plurality of transparent display units. ### Claim 12 (depends on 1) The display device according to claim 1, wherein a distance between each center of each of the plurality of transparent display units in a thickness direction thereof is no less than quadruple a thickness of each of the plurality of transparent display units. ### Claim 13 (depends on 1) A game machine comprising: the display device according to claim 1, wherein visuals are presented on the display device in accordance with a progress of play. ### Claim 14 (depends on 2) The display device according to claim 2, wherein the monochromatic grayscale images of mutually different colors output from each of the light emitting surfaces comprise a substantially identical design. ### Claim 15 (depends on 3) The display device according to claim 3, wherein the monochromatic grayscale images of mutually different colors output from each of the light emitting surfaces comprise a substantially identical design. ### Claim 16 (depends on 2) The display device according to claim 2, wherein the plurality of transparent display units comprises light guide plates that direct light entering therein and cause a portion of the light to exit from the light emitting surface; and the light guide plates each comprise a specific emission pattern. ### Claim 17 (depends on 3) The display device according to claim 3, wherein the plurality of transparent display units comprise light guide plates that direct light entering therein and cause a portion of the light to exit from the light emitting surface; and the light guide plates each comprise a specific emission pattern. ### Claim 18 (depends on 4) The display device according to claim 4, wherein the plurality of transparent display units comprise light guide plates that direct light entering therein and cause a portion of the light to exit from the light emitting surface; and the light guide plates each comprise a specific emission pattern. ### Claim 19 (depends on 14) The display device according to claim 14, wherein the plurality of transparent display units comprise light guide plates that direct light entering therein and cause a portion of the light to exit from the light emitting surface; and the light guide plates each comprise a specific emission pattern. ### Claim 20 (depends on 15) The display device according to claim 15, wherein the plurality of transparent display units comprise light guide plates that direct light entering therein and cause a portion of the light to exit from the light emitting surface; and the light guide plates each comprise a specific emission pattern.