# US 2017/0285402 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0285402 A1 - Document ID: US20170285402A1 - Status: Published application - Kind: A1 - Application number: 15/478,579 - Filed: 2017-04-04 - Published: 2017-10-05 - Earliest claimed: 2016-04-05 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Takeo Koito; Yudai Numata - Web page: https://patentgrep.com/patent/US20170285402A1 ## CPC - G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)} - G02B 5/12: Reflex reflectors - G02B 5/124: plural reflecting elements forming part of a unitary plate or sheet - G02B 5/128: transparent spheres being embedded in matrix - G02B 30/56: by projecting aerial or floating images - G02F 1/13363: Birefringent elements, e.g. for optical compensation - 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 - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract According to one embodiment, a display device includes an optical element which transmits or reflects incident light, and a first reflective element including a first reflective portion and a second reflective portion. The first reflective portion retroreflects reflective light reflected on the optical element. The second reflective portion has an area less than an area of the first reflective portion and regularly reflects the reflective light. ## Claims ### Claim 1 A display device comprising: an optical element which transmits or reflects incident light; and a first reflective element comprising a first reflective portion which retroreflects reflective light reflected on the optical element, and a second reflective portion which has an area less than an area of the first reflective portion and regularly reflects the reflective light. ### Claim 2 (depends on 1) The device of claim 1, further comprising a second reflective element which retroreflects light regularly reflected on the first reflective portion. ### Claim 3 (depends on 1) The device of claim 1, wherein the first reflective element makes an acute angle with the optical element. ### Claim 4 (depends on 1) The device of claim 1, wherein the second reflective portion is surrounded by the first reflective portion, and is provided in a zigzag pattern. ### Claim 5 (depends on 1) The device of claim 1, wherein the first reflective portion radially extends from a center, and comprises first to third reflective surfaces intersecting each other, the second reflective portion is provided in first to third regions adjacent to a region in which the first reflective portion is located in plan view, the first region is adjacent to the first and second reflective surfaces and is isolated from the center in plan view, the second region is adjacent to the second and third reflective surfaces and is isolated from the center in plan view, and the third region is adjacent to the third and first reflective surfaces and is isolated from the center in plan view. ### Claim 6 (depends on 5) The device of claim 5, wherein the second reflective portion comprises a flat surface in each of the first to third regions. ### Claim 7 (depends on 5) The device of claim 5, wherein the second reflective portion comprises a projecting portion which projects to a side away from the center. ### Claim 8 (depends on 1) The device of claim 1, wherein the first reflective portion comprises a phototransmissive spherical member, and the spherical member comprises: a first curved surface which is located on a side close to the optical element and refracts the reflective light; and a second curved surface which is located on a side away from the optical element and reflects the reflective light. ### Claim 9 A display device comprising: an optical element which transmits or reflects incident light; and a first reflective element comprising a first reflective portion which has an uneven surface with respect to a first plane and retroreflects reflective light reflected on the optical element, and a second reflective portion which regularly reflects the reflective light, wherein the first reflective portion comprises first, second and third reflective surfaces being in contact with each other at a central point, the first reflective surface is adjacent to the second and third reflective surfaces, the second reflective surface is adjacent to the first and third reflective surfaces, the third reflective surface is adjacent to the third and first reflective surfaces, the second reflective portion is provided in first, second and third regions comprising a flat surface parallel to the first plane, the first region is adjacent to the first and second reflective surfaces, the second region is adjacent to the second and third reflective surfaces, and the third region is adjacent to the third and first reflective surfaces. ### Claim 10 (depends on 9) The device of claim 9, wherein the first reflective portion is depressed toward the central point. ### Claim 11 (depends on 9) The device of claim 9, wherein the first region, the second region and the third region are isolated from each other. ### Claim 12 (depends on 9) The device of claim 9, further comprising a second reflective element which retroreflects light regularly reflected on the first reflective element toward the first reflective element. ### Claim 13 (depends on 9) The device of claim 9, wherein the first reflective portion comprises a phototransmissive spherical member, and the spherical member comprises: a first curved surface which is located on a side close to the optical element and refracts the reflective light; and a second curved surface which is located on a side away from the optical element and reflects the reflective light. ### Claim 14 (depends on 9) The device of claim 9, wherein a total area of the first, second and third regions is less than a total area of the first, second and third reflective surfaces in plan view. ### Claim 15 A display device comprising: an optical element which transmits or reflects incident light; and a first reflective element comprising a first reflective portion which retroreflects reflective light reflected on the optical element, and a second reflective portion which regularly reflects the reflective light, wherein the first reflective portion comprises first, second and third reflective surfaces being in contact with each other at a central point, the first reflective surface is adjacent to the second and third reflective surfaces, the second reflective surface is adjacent to the first and third reflective surfaces, the third reflective surface is adjacent to the third and first reflective surfaces, the second reflective portion is provided in projecting first, second and third regions, the first region is adjacent to the first and second reflective surfaces, the second region is adjacent to the second and third reflective surfaces, and the third region is adjacent to the third and first reflective surfaces. ### Claim 16 (depends on 15) The device of claim 15, wherein the first reflective portion is depressed toward the central point. ### Claim 17 (depends on 16) The device of claim 16, wherein the first, second and third regions project in a direction opposite to a direction in which the first reflective portion is depressed. ### Claim 18 (depends on 15) The device of claim 15, further comprising a second reflective element which retroreflects light regularly reflected on the first reflective element toward the first reflective element. ### Claim 19 (depends on 15) The device of claim 15, wherein the first reflective portion comprises a phototransmissive spherical member, and the spherical member comprises: a first curved surface which is located on a side close to the optical element and refracts the reflective light; and a second curved surface which is located on a side away from the optical element and reflects the reflective light. ### Claim 20 (depends on 15) The device of claim 15, wherein a total area of the first, second and third regions is less than a total area of the first, second and third reflective surfaces in plan view.