# US 10,480,754 B2 · Illumination device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,754 B2 - Document ID: US10480754B2 - Status: Granted - Kind: B2 - Application number: 15/854,542 - Filed: 2017-12-26 - Published: 2018-06-28 - Granted: 2019-11-19 - Earliest claimed: 2016-12-27 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Keiichi Gomi; Takanori Aruga - Web page: https://patentgrep.com/patent/US10480754B2 ## CPC - F21V 13/14: the elements being filters or photoluminescent elements, reflectors and refractors - F21S 6/00: Lighting devices intended to be free-standing (F21S9/00, F21S10/00, {F21S13/12} take precedence {lighting devices specially adapted to be transported from place to place, e.g. lighting devices carried on wheeled supports F21L; details of supports for lighting devices F21V21/00}) - F21V 7/0016: {on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes} - F21V 7/0033: {with successive reflections from one reflector to the next or following} - F21V 7/0091: {using total internal reflection} - F21V 7/26: the material comprising photoluminescent substances - F21V 9/30: Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) - F21V 17/02: with provision for adjustment (F21V17/04 - F21V17/08 take precedence) - F21V 21/30: Pivoted housings or frames - F21Y 2115/30: Semiconductor lasers - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - 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 ## Abstract An illumination device includes: a laser light source; a cylindrical body disposed such that light emitted from the laser light source enters the cylindrical body at a first end portion side of the cylindrical body and passes through the cylindrical body; a reflector disposed so as to reflect light passing through the cylindrical body; and a ring assembly comprising a ring-shaped inner circumferential surface configured to reflect and propagate light from the reflector. The reflector includes: a first reflecting surface configured to reflect a first portion of light emitted from the laser light source, and a second reflecting surface configured to reflect a second portion of light emitted from the laser light source. The ring assembly further includes a fluorescent surface adapted to emit fluorescence by light reflected and propagated at the inner circumferential surface. ## Claims ### Claim 1 An illumination device comprising: a laser light source; a cylindrical body disposed such that light emitted from the laser light source enters the cylindrical body at a first end portion side of the cylindrical body and passes through the cylindrical body; a reflector disposed so as to reflect light passing through the cylindrical body; and a ring assembly comprising a ring-shaped inner circumferential surface configured to reflect and propagate light from the reflector, wherein the reflector comprises: a first reflecting surface configured to reflect a first portion of light emitted from the laser light source such that the first portion of light is propagated from a first side of the inner circumferential surface in a circumferential direction to a second side of the inner circumferential surface in the circumferential direction, and a second reflecting surface configured to reflect a second portion of light emitted from the laser light source such that the second portion of light is propagated from the second side of the inner circumferential surface in the circumferential direction to the first side of the inner circumferential surface in the circumferential direction, and wherein the ring assembly further comprises a fluorescent surface adapted to emit fluorescence by light reflected and propagated at the inner circumferential surface. ### Claim 2 (depends on 1) The illumination device according to claim 1, wherein: the ring assembly further comprises: a base ring comprising the inner circumferential surface, and an upper surface ring disposed along the inner circumferential surface and comprising the fluorescent surface, and the inner circumferential surface and the fluorescent surface are disposed adjacent to each other. ### Claim 3 (depends on 1) The illumination device according to claim 1, wherein the reflector is a prism. ### Claim 4 (depends on 1) The illumination device according to claim 1, wherein the laser light source comprises a collimating lens configured such that an optical path of laser light emitted from the laser light source passes therethrough, the collimating lens being configured to convert the laser light into parallel light. ### Claim 5 (depends on 1) The illumination device according to claim 1, further comprising: a holding body that holds the ring assembly on a second end portion side of the cylindrical body, wherein the holding body comprises: a pedestal connected to the second end portion side of the cylindrical body, and a rotary support shaft portion that supports the ring assembly such that an installation angle of the ring assembly is changeable, wherein the pedestal comprises: a main body portion having an opening configured to allow light that has passed through the cylindrical body to pass through the opening toward the reflector, and upward-extending portions that hold the rotary support shaft portion at both sides of the main body portion, and wherein the rotary support shaft portion is fixed to the ring assembly and supported by the upward-extending portions in a rotatable manner. ### Claim 6 (depends on 5) The illumination device according to claim 5, wherein the rotary support shaft portion is supported by the upward-extending portions such that a static friction coefficient between the rotary support shaft portion and the upward-extending portions is greater than a dynamic friction coefficient between the rotary support shaft portion and the upward-extending portions. ### Claim 7 (depends on 5) The illumination device according to claim 5, wherein: the ring assembly further comprises: a base ring comprising the inner circumferential surface, and an upper surface ring disposed along the inner circumferential surface and comprising the fluorescent surface, and the inner circumferential surface and the fluorescent surface are disposed adjacent to each other. ### Claim 8 (depends on 7) The illumination device according to claim 7, wherein the rotary support shaft portion is supported by the upward-extending portions such that a static friction coefficient between the rotary support shaft portion and the upward-extending portions is greater than a dynamic friction coefficient between the rotary support shaft portion and the upward-extending portions. ### Claim 9 (depends on 5) The illumination device according to claim 5, wherein the reflector is a prism. ### Claim 10 (depends on 9) The illumination device according to claim 9, wherein the rotary support shaft portion is supported by the upward-extending portions such that a static friction coefficient between the rotary support shaft portion and the upward-extending portions is greater than a dynamic friction coefficient between the rotary support shaft portion and the upward-extending portions. ### Claim 11 (depends on 5) The illumination device according to claim 5, wherein the laser light source comprises a collimating lens configured such that an optical path of laser light emitted from the laser light source passes therethrough, the collimating lens being configured to convert the laser light into parallel light. ### Claim 12 (depends on 11) The illumination device according to claim 11, wherein the rotary support shaft portion is supported by the upward-extending portions such that a static friction coefficient between the rotary support shaft portion and the upward-extending portions is greater than a dynamic friction coefficient between the rotary support shaft portion and the upward-extending portions. ### Claim 13 (depends on 5) The illumination device according to claim 5, wherein the ring assembly further includes a light shielding member on a side away from the laser light source, the light shielding member shielding light from the laser light source and the fluorescence. ### Claim 14 (depends on 13) The illumination device according to claim 13, wherein the rotary support shaft portion is supported by the upward-extending portions such that a static friction coefficient between the rotary support shaft portion and the upward-extending portions is greater than a dynamic friction coefficient between the rotary support shaft portion and the upward-extending portions. ### Claim 15 (depends on 13) The illumination device according to claim 13, further comprising a support member disposed on the light shielding member and supporting the reflector. ### Claim 16 (depends on 15) The illumination device according to claim 15, wherein the rotary support shaft portion is supported by the upward-extending portions such that a static friction coefficient between the rotary support shaft portion and the upward-extending portions is greater than a dynamic friction coefficient between the rotary support shaft portion and the upward-extending portions. ### Claim 17 (depends on 1) The illumination device according to claim 1, wherein the ring assembly further includes a light shielding member on a side away from the laser light source, the light shielding member shielding light from the laser light source and the fluorescence. ### Claim 18 (depends on 17) The illumination device according to claim 17, further comprising a support member disposed on the light shielding member and supporting the reflector.