# US 12,181,689 B2 · Light-distribution adjustment sheet and display unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,181,689 B2 - Document ID: US12181689B2 - Status: Granted - Kind: B2 - Application number: 18/233,915 - Filed: 2023-08-15 - Published: 2024-02-15 - Granted: 2024-12-31 - Earliest claimed: 2014-06-13 - Assignees: Saturn Licensing LLC - Applicants: Saturn Licensing LLC - Inventors: Norimasa Furukawa; Mitsuhiko Taki; Ichiro Utsumi; Kenichi Nakaki - Web page: https://patentgrep.com/patent/US12181689B2 ## CPC - G02B 3/005: {arranged along a single direction only, e.g. lenticular sheets (G02B3/0043 takes precedence)} - G02B 3/02: with non-spherical faces (G02B3/10 takes precedence) - G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors - G02F 1/133526: {Lenses, e.g. microlenses or Fresnel lenses} - G02F 1/133562: {on the viewer side} - 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 unit of the disclosure includes a display panel and a light-distribution adjustment sheet. The light-distribution adjustment sheet is provided on the display panel, and includes a protrusion that protrudes toward the display panel. The protrusion includes a first region including a curved surface, and a second region including a flat surface. ## Claims ### Claim 1 A display apparatus, comprising: a panel having a layout for a plurality of pixels and a light entrance side opposing a light exit side; a light-distribution adjustment sheet positioned over a side of the panel, wherein the light-distribution adjustment sheet comprises a plurality of protrusions in which each pixel of the plurality of pixels is associated with and has disposed therein at least two protrusions of the plurality of protrusions and the protrusions protrude towards the panel; and wherein each of the protrusions comprises two opposing first side regions with a second top region therebetween with inflection points connecting the first side regions to the second top region, the two opposing first side regions have elliptical arc forms, and wherein each pixel of the plurality of the pixels is formed by combining color subpixels. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein a pixel width is designated 1 unit and a width of the protrusion is 0.33 units or less. ### Claim 3 (depends on 1) The display apparatus according to claim 1, wherein the second top region is flat. ### Claim 4 (depends on 1) The display apparatus according to claim 1, wherein the color subpixels are formed on a color filter substrate having color filters. ### Claim 5 (depends on 1) The display apparatus according to claim 1, further comprising an antireflection surface treatment on a side of the light-distribution adjustment sheet opposed to a side on which the protrusions reside. ### Claim 6 (depends on 1) The display apparatus according to claim 1, further comprising a protruding side on which the protrusions reside and which is devoid of discontinuous points. ### Claim 7 (depends on 1) The display apparatus according to claim 1, wherein the panel is an organic light emitting panel. ### Claim 8 (depends on 1) The display apparatus according to claim 1, wherein the light-distribution adjustment sheet is formed of polyethylene terephthalate (PET), acrylic resin (PMMA), or polycarbonate (PC). ### Claim 9 (depends on 1) The display apparatus according to claim 1, wherein the light-distribution adjustment sheet is bonded to the panel through an adhesive layer through a resin layer. ### Claim 10 (depends on 9) The display apparatus according to claim 9, further comprising an antireflection surface treatment on a side of the light-distribution adjustment sheet opposed to a side on which the protrusions reside. ### Claim 11 (depends on 1) The display apparatus according to claim 1, wherein a peripheral edge of the panel is sealed with a sealing resin that planarizes a shoulder end face of the panel. ### Claim 12 (depends on 11) The display apparatus according to claim 11, wherein the first regions have curved surfaces. ### Claim 13 (depends on 11) The display apparatus according to claim 11, further comprising a protruding side on which the protrusions reside and which is devoid of discontinuous points. ### Claim 14 (depends on 1) The display apparatus according to claim 1, wherein the first regions have curved surfaces. ### Claim 15 (depends on 1) The display apparatus according to claim 1, further comprising a plurality of light sources, an optical sheet, and a reflector. ### Claim 16 (depends on 15) The display apparatus according to claim 15, wherein the light sources are LEDs. ### Claim 17 (depends on 16) The display apparatus according to claim 16, wherein the panel is a liquid crystal panel. ### Claim 18 (depends on 1) The display apparatus according to claim 1, further comprising a protruding side on which the protrusions reside, the protruding side faces the panel. ### Claim 19 (depends on 1) The display apparatus according to claim 1, wherein the light-distribution adjustment sheet is bonded to the panel through an adhesive layer. ### Claim 20 (depends on 1) The display apparatus according to claim 1, wherein the panel is a liquid crystal panel.