# US 11,898,709 B2 · Lighting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,898,709 B2 - Document ID: US11898709B2 - Status: Granted - Kind: B2 - Application number: 18/099,354 - Filed: 2023-01-20 - Published: 2023-07-27 - Granted: 2024-02-13 - Earliest claimed: 2022-01-24 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Takashi Ota; Nobuyuki Suzuki; Makoto Hasegawa; Masafumi Okada - Web page: https://patentgrep.com/patent/US11898709B2 ## CPC - F21K 9/68: Details of reflectors forming part of the light source - F21V 14/003: {by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices} - F21K 9/69: Details of refractors forming part of the light source - F21V 5/04: of lens shape - F21V 7/0066: {specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified (F21V7/16 - F21V7/30 take precedence)} - F21V 7/0083: {Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane (combination of two or more reflectors F21V7/0025)} - F21Y 2107/50: on planar substrates or supports, but arranged in different planes or with differing orientation, e.g. on plate-shaped supports with steps on which light-generating elements are mounted - F21Y 2113/13: comprising an assembly of point-like light sources - F21Y 2115/10: Light-emitting diodes [LED] - G02F 1/133526: {Lenses, e.g. microlenses or Fresnel lenses} - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED - 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 lighting device including a first unit and a second unit, the first unit including: a first funnel shaped reflector having a first neck, a first opening, a first reflecting surface and a first light axis, a first LED emitting a first color disposed on the first neck, a first liquid crystal lens disposed at the first opening, a second unit including: a second funnel shaped reflector having a second neck, a second opening, a second reflecting surface and a second light axis, a second LED emitting a second color disposed on the second neck, a second liquid crystal lens disposed at the second opening; a length h1 of the first funnel shaped reflector is same as a length of the second funnel shaped reflector, and a diameter d1 of the first opening is same as a diameter of the second opening, and h1/d1 is two or more. ## Claims ### Claim 1 A lighting device comprising a first unit and a second unit, a first unit including: a first funnel shaped reflector having a first neck, a first opening, a first reflecting surface and a first light axis, a first LED emitting a first color being disposed on the first neck, a first liquid crystal lens being disposed at the first opening, a second unit including: a second funnel shaped reflector having a second neck, a second opening, a second reflecting surface and a second light axis, a second LED emitting a second color being disposed on the second neck, a second liquid crystal lens being disposed at the second opening, wherein a length h1 of the first funnel shaped reflector along the first light axis is same as a length of the second funnel shaped reflector along the second light axis, a diameter d1 of the first opening of the first funnel shaped reflector is same as a diameter of the second opening of the second funnel shaped reflector, h1/d1 is two or more, a first collimated light from the first funnel shaped reflector enters the first liquid crystal lens, and a second collimated light from the second funnel shaped reflector enters the second liquid crystal lens. ### Claim 2 (depends on 1) The lighting device according to claim 1, the lighting device further including a third unit, the third unit including: a third funnel shaped reflector having a third neck, a third opening, a third reflecting surface and a third light axis, a third LED emitting a third color being disposed on the third neck, a third liquid crystal lens being disposed at the third opening, wherein a length of the third funnel shaped reflector along the third light axis is same as a length of the first funnel shaped reflector along the first light axis, and a diameter of the third opening of the third funnel shaped reflector is same as a diameter of the first opening of the first funnel shaped reflector. ### Claim 3 (depends on 2) The lighting device according to claim 2, the lighting device further including a fourth unit, the fourth unit including: a fourth funnel shaped reflector having a fourth neck, a fourth opening, a fourth reflecting surface and a fourth light axis, a fourth LED emitting a fourth color being disposed on the fourth neck, a fourth liquid crystal lens being disposed at the fourth opening, wherein a length of the fourth funnel shaped reflector along the fourth light axis is same as a length of the first funnel shaped reflector along the first light axis, and a diameter of the fourth opening of the fourth funnel shaped reflector is same as a diameter of the first opening of the first funnel shaped reflector. ### Claim 4 (depends on 3) The lighting device according to claim 3, wherein the first color is red, the second color is green, the third color is blue, and the fourth color is white. ### Claim 5 (depends on 3) A lighting device according to claim 3, wherein, the first opening, the second opening, the third opening and the fourth opening are rectangle. ### Claim 6 (depends on 5) The lighting device according to claim 5, wherein the first opening, the second opening, the third opening and the fourth opening are rectangle, and a length of a long axis of the rectangle is a diameter d1 of the first opening of the first funnel shaped reflector. ### Claim 7 (depends on 3) The lighting device according to claim 3, wherein the first opening, the second opening, the third opening and the fourth opening are circle, and d1 is a diameter of the circle. ### Claim 8 (depends on 3) The lighting device according to claim 3, wherein at least a part of the first reflecting surface, at least a part of the second reflecting surface, at least a part of the third reflecting surface and at least a part of the fourth reflecting surface are paraboloid. ### Claim 9 (depends on 1) The lighting device according to claim 1, wherein h1/d1 is three or more. ### Claim 10 A lighting device comprising a first assembly and a second assembly, a first assembly including: a first funnel shaped reflector having a first neck, a first opening, a first reflecting surface and a first light axis, a first liquid crystal lens being disposed at the first opening, a length of the first funnel shaped reflector along the first light axis being h1 and a diameter of the opening being d1, a first unit including a first LED emitting a first color being disposed on the first neck, a second unit including a second LED emitting a second color being disposed on the first neck, a third unit including a third LED emitting a third color being disposed on the first neck, a fourth unit including a fourth LED emitting a fourth color being disposed on the first neck, a second assembly including: a second funnel shaped reflector having a second neck, a second opening, a second reflecting surface and a second light axis, a second liquid crystal lens being disposed at the second opening, a length of the second funnel shaped reflector along the second light axis being h2 and a diameter of the opening being d2, a fifth unit including a first LED emitting a first color being disposed on the second neck, a sixth unit including a second LED emitting a second color being disposed on the second neck, a seventh unit including a third LED emitting a third color being disposed on the second neck, an eighth unit including a fourth LED, emitting a fourth color, disposed on the second neck, wherein h1/d1 is two or more, and h1>h2, and a collimated light from the first funnel shaped reflector enters the first liquid crystal lens. ### Claim 11 (depends on 10) The lighting device according to claim 10, wherein h1/d1 is three or more and h2/d2 is two or more, and a diameter of the first opening and a diameter of the second opening are essentially same. ### Claim 12 (depends on 10) The lighting device according to claim 10, wherein the first opening and the second opening are rectangle. ### Claim 13 (depends on 10) The lighting device according to claim 10, wherein the first opening and the second opening are rectangle and d1 is a length of a long axis of the rectangle. ### Claim 14 (depends on 10) The lighting device according to claim 10, wherein the first opening and the second opening are circle and d1 is a diameter of the circle. ### Claim 15 (depends on 10) The lighting device according to claim 10, wherein at least a part of the first reflecting surface and at least of part of the second reflecting surface are paraboloid.