# US 2014/0153216 A1 · Phosphor optical element and light-emitting device using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153216 A1 - Document ID: US20140153216A1 - Status: Published application - Kind: A1 - Application number: 14/173,773 - Filed: 2014-02-05 - Published: 2014-06-05 - Earliest claimed: 2011-08-15 - Assignees: Panasonic Corporation - Applicants: Panasonic Corporation - Inventors: Kazuhiko YAMANAKA; Norio IKEDO - Web page: https://patentgrep.com/patent/US20140153216A1 ## CPC - C09K 11/025: {non-luminescent particle coatings or suspension media} - C09K 11/08: containing inorganic luminescent materials - F21V 5/04: of lens shape - F21V 5/10: comprising photoluminescent material - 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 9/08: for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40) - H05B 33/10: Apparatus or processes specially adapted to the manufacture of electroluminescent light sources - C09K 11/02: Use of particular materials as binders, particle coatings or suspension media therefor - F21Y 2115/30: Semiconductor lasers - H10H 20/8514: {characterised by their shape, e.g. plate or foil} - H10H 20/8515: {not being in contact with the bodies} - H10W 90/724: {between a chip and a stacked insulating package substrate, interposer or RDL} - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A phosphor optical element includes: a base member; a phosphor-containing member that includes a transparent member containing a phosphor particle; and a cover member, wherein the base member, the phosphor-containing member, and the cover member are sequentially formed on a transparent base that is transparent to a wavelength of incident light from an excitation light source, the phosphor particle has a diameter no greater than the wavelength of the incident light, and in an arbitrary cross section of the phosphor-containing member in a direction perpendicular to a main surface of the transparent base, the phosphor-containing member has, in a direction perpendicular to the main surface of the transparent base, a thickness no greater than the wavelength of the incident light. ## Claims ### Claim 1 A phosphor optical element comprising: a base member; a phosphor-containing member that includes a transparent member containing a phosphor particle; and a cover member, wherein the base member, the phosphor-containing member, and the cover member are sequentially formed on a transparent base that is transparent to a wavelength of incident light from an excitation light source, the phosphor particle has a diameter no greater than the wavelength of the incident light, and in an arbitrary cross section of the phosphor-containing member in a direction perpendicular to a main surface of the transparent base, the phosphor-containing member has, in at least one of (i) a direction perpendicular to and (ii) a direction horizontal to the main surface of the transparent base, a thickness no greater than the wavelength of the incident light. ### Claim 2 (depends on 1) The phosphor optical element according to claim 1, wherein at least one of the base member and the cover member includes a multilayer film whose layers are stacked in a direction perpendicular to the transparent base. ### Claim 3 (depends on 2) The phosphor optical element according to claim 2, wherein the multilayer film is a dielectric multilayer film. ### Claim 4 (depends on 1) The phosphor optical element according to claim 1, wherein the base member transmits the incident light and reflects fluorescent light emitted from the phosphor-containing member. ### Claim 5 (depends on 1) The phosphor optical element according to claim 1, wherein the phosphor-containing member has, in a two dimensional planar direction that is a direction parallel to the main surface of the transparent base, a refractive index distribution according to a two-dimensional periodic structure. ### Claim 6 (depends on 5) The phosphor optical element according to claim 5, wherein the two-dimensional periodic structure includes a photonic crystal. ### Claim 7 (depends on 1) The phosphor optical element according to claim 1, wherein the phosphor-containing member includes two types of transparent materials having different refractive indices, and the phosphor particle is included in at least one of the two types of transparent materials having different refractive indices. ### Claim 8 (depends on 7) The phosphor optical element according to claim 7, wherein at least one of the two types of transparent materials having different refractive indices includes ZnO. ### Claim 9 (depends on 8) The phosphor optical element according to claim 8, wherein a topmost layer of the base member is a ZnO film. ### Claim 10 (depends on 1) A light-emitting device comprising: the phosphor optical element according to claim 1; and a light-emitting element that is an excitation light source, wherein the light-emitting element has an optical axis perpendicular to a surface of the transparent base of the phosphor optical element.