# US 12,001,107 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 12,001,107 B2 - Document ID: US12001107B2 - Status: Granted - Kind: B2 - Application number: 18/113,876 - Filed: 2023-02-24 - Published: 2023-07-06 - Granted: 2024-06-04 - Earliest claimed: 2021-05-11 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Tenfu Nakamura - Web page: https://patentgrep.com/patent/US12001107B2 ## CPC - G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members} - G02F 1/136286: {Wiring, e.g. gate line, drain line} - G02F 1/133342: {for double-sided displays} - G02F 1/1334: based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals - G02F 1/133616: {Front illuminating devices} - G02F 1/13471: {in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells (G02F1/13475 takes precedence)} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - 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 According to one embodiment, a display device including a first transparent substrate, a second transparent substrate, a liquid crystal layer, a third transparent substrate, and a transparent layer having a refractive index lower than a refractive index of the third transparent substrate, wherein the transparent layer includes a plurality of band portions including first to third band portions, a second end portion has a smaller width than a first end portion in band portions, the second end portion of the second band portion has a smaller width than the second end portion of the first band portion, and the second end portion of the third band portion has a smaller width than the second end portion of the first band portion. ## Claims ### Claim 1 A display device comprising: a substrate including a main surface, a first side surface, a second side surface intersecting the first side surface, and a third side surface intersecting the first side surface and located on an opposite side of the second side surface; light emitting elements opposing the first side surface; a liquid crystal layer which light emitted from the light emitting elements enters; and a transparent layer being in contact with the main surface, located between the main surface and the liquid crystal layer, and having a refractive index lower than a refractive index of the substrate, wherein the transparent layer has band portions arranged along the first side surface and a frame portion surrounding the band portions, each of the band portions has a first end on a side of the first side surface and a second end opposite to the first end, the band portions include a first band portion, and a second band portion located between the first band portion and the second side surface, the second band portion is closer to the second side surface than to the third side surface, the second end of the first band portion has a first width, the second end of the second band portion has a second width, and the first width is wider than the second width. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the liquid crystal layer includes a polymer dispersed liquid crystal. ### Claim 3 (depends on 1) The display device according to claim 1, wherein an image displayed by the display device can be observed in both the main surface side and an opposite side of the main surface. ### Claim 4 (depends on 1) The display device according to claim 1, wherein a background of the display device can be observed through the display device. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the transparent layer is made of a siloxane-based resin or a fluorine-based resin. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the substrate is a third substrate, the display device further comprising: a first substrate including pixel electrodes; and a second substrate, wherein the liquid crystal layer is held between the first substrate and the second substrate, and the third substrate is on one of the first substrate and the second substrate. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the first end is wider than the second end. ### Claim 8 (depends on 1) The display device according to claim 1, wherein the first band portion is opposed to a center of the first side surface. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the first band portion is located between the second side surface and a center of the main surface. ### Claim 10 (depends on 1) The display device according to claim 1, wherein the band portions overlap a display portion displaying an image, and the frame portion overlaps a non-display portion surrounding the display portion. ### Claim 11 (depends on 1) The display device according to claim 1, wherein the band portions are separated from the frame portion. ### Claim 12 (depends on 1) The display device according to claim 1, wherein the second end is separated from the frame portion. ### Claim 13 (depends on 12) The display device according to claim 12, wherein the first end is in contact with the frame portion. ### Claim 14 (depends on 1) The display device according to claim 1, further comprising: a third band portion, wherein the second end of the third band portion has a third width, the first band portion is located between the second band portion and the third band portion, and the first width is wider than the third width. ### Claim 15 (depends on 1) The display device according to claim 1, further comprising: a fourth band portion, wherein the second end of the fourth band portion has a fourth width, the second band portion is located between the first band portion and the fourth band portion, and the second width is wider than the fourth width. ### Claim 16 A display device comprising: a substrate including a main surface, a first side surface, a second side surface intersecting the first side surface, and a third side surface intersecting the first side surface and located on an opposite side of the second side surface; light emitting elements opposing the first side surface; a liquid crystal layer which light emitted from the light emitting elements enters; and a transparent layer being in contact with the main surface, located between the main surface and the liquid crystal layer, and having a refractive index lower than a refractive index of the substrate, wherein the transparent layer has band portions arranged along the first side surface, each of the band portions has a first end on a side of the first side surface and a second end opposite to the first end, the band portions include a first band portion, and a second band portion located between the first band portion and the second side surface, the second band portion is closer to the second side surface than to the third side surface, the second end of the first band portion has a first width, the second end of the second band portion has a second width, and the first width is wider than the second width. ### Claim 17 (depends on 16) The display device according to claim 16, wherein the first band portion is closer to a center of the main surface than to the second side surface. ### Claim 18 A display device comprising: a substrate including a main surface, a first side surface, and a second side surface intersecting the first side surface; light emitting elements opposing the first side surface; a liquid crystal layer which light emitted from the light emitting elements enters; and a transparent layer on the main surface, located between the main surface and the liquid crystal layer, and having a refractive index lower than a refractive index of the substrate, wherein the transparent layer has band portions arranged along the first side surface and a frame portion surrounding the band portions, each of the band portions has a first end on a side of the first side surface and a second end opposite to the first end, and the second end is separated from the frame portion. ### Claim 19 (depends on 18) The display device according to claim 18, wherein an entirety of each of the band portions is separated from the frame portion. ### Claim 20 (depends on 18) The display device according to claim 18, wherein the first end is in contact with the frame portion.