# US 2024/0200734 A1 · Lighting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0200734 A1 - Document ID: US20240200734A1 - Status: Published application - Kind: A1 - Application number: 18/286,454 - Filed: 2022-04-27 - Published: 2024-06-20 - Earliest claimed: 2021-04-28 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Kee Youn JANG; Dong II EOM; Jae Hyuk JANG - Web page: https://patentgrep.com/patent/US20240200734A1 ## CPC - F21K 9/64: using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer - F21V 9/32: characterised by the arrangement of the photoluminescent material - F21S 41/24: Light guides - F21S 41/285: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805} - F21S 43/14: Light emitting diodes [LED] - F21S 43/16: Light sources where the light is generated by photoluminescent material spaced from a primary light generating element - F21S 43/26: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255} - F21V 7/05: plane - F21V 9/45: by adjustment of photoluminescent elements - F21V 3/049: {Patterns or structured surfaces for diffusing light, e.g. frosted surfaces} - F21V 3/062: {the material being plastics} - F21W 2103/00: Exterior vehicle lighting devices for signalling purposes - G02B 6/0003: {the light guides being doped with fluorescent agents} - G02B 6/0035: {provided on the surface of the light guide or in the bulk of it} - G02B 6/0065: {Manufacturing aspects; Material aspects} - G02B 6/0073: {Light emitting diode [LED]} - 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 - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract The lighting device disclosed at an embodiment of the invention comprises: a reflective member; a resin layer disposed on the reflective member; a light emitting device disposed to correspond to one side surface of the resin layer; and a light wavelength conversion layer disposed on one surface of the resin layer. The light wavelength conversion layer includes a main phosphor pattern disposed in a long axis direction of the resin layer, the main phosphor pattern includes a first unit-phosphor pattern disposed in a first region and a second unit-phosphor pattern disposed in a second region, the first region may be located closer to the light emitting device than the second region, and a width of the first unit-phosphor pattern may be less than a width of the second unit-phosphor pattern. ## Claims ### Claim 1 A lighting device comprising: a reflective member; a resin layer disposed on the reflective member; a light emitting device disposed to correspond to one side surface of the resin layer; and a light wavelength conversion layer disposed on one surface of the resin layer, wherein the light wavelength conversion layer includes a main phosphor pattern disposed in a long axis direction of the resin layer, wherein the main phosphor pattern includes a first unit-phosphor pattern disposed in a first region and a second unit-phosphor pattern disposed in a second region, wherein the first region is located closer to the light emitting device than the second region, and wherein a width of the first unit-phosphor pattern is less than a width of the second unit-phosphor pattern. ### Claim 2 (depends on 1) The lighting device of claim 1, wherein the main phosphor pattern includes a third unit-phosphor pattern disposed on a third region adjacent to the second region, wherein the second region is disposed between the first region and the third region, wherein a width of the third unit-phosphor pattern is greater than the width of the first unit-phosphor pattern. ### Claim 3 (depends on 2) The lighting device of claim 2, wherein the first to third unit-phosphor patterns have the same length. ### Claim 4 (depends on 1) The lighting device of claim 1, wherein the light wavelength conversion layer is disposed in the first region and includes a sub-phosphor pattern disposed to be spaced apart from the first unit-phosphor pattern. ### Claim 5 (depends on 4) The lighting device of claim 4, wherein the sub-phosphor pattern includes a plurality of unit sub-phosphor patterns spaced apart from each other, and cross-sectional areas of the plurality of unit sub-phosphor patterns are the same. ### Claim 6 (depends on 5) The lighting device of claim 5, wherein the separation distances between the plurality of unit sub-phosphor patterns are the same. ### Claim 7 (depends on 1) The lighting device of claim 1, wherein a phosphor concentration of the first unit-phosphor pattern is the same as a phosphor concentration of the second unit-phosphor pattern. ### Claim 8 (depends on 1) The lighting device of claim 1, comprising a colored optical layer disposed on the resin layer, wherein the colored optical layer emits light emitted from the light wavelength conversion layer, and limits an emission of light in the same wavelength range as a light emitted from the light emitting device. ### Claim 9 A lighting device comprising: a reflective member; a resin layer disposed on the reflective member; a light emitting device disposed to correspond to one side surface of the resin layer; a light wavelength conversion layer disposed on one surface of the resin layer, wherein the light wavelength conversion layer includes a main phosphor pattern disposed in a long axis direction of the resin layer and a sub-phosphor pattern spaced apart from the main phosphor pattern, wherein the main phosphor pattern includes a first unit-phosphor pattern disposed in a first region, and wherein the sub-phosphor pattern is disposed in the first region and includes a plurality of unit sub-phosphor patterns spaced apart from the first unit-phosphor pattern. ### Claim 10 (depends on 9) The lighting device of claim 9, wherein the light wavelength conversion layer is disposed between the resin layer and the reflective member. ### Claim 11 A lighting device comprising: a resin layer; a light emitting device disposed to correspond to one side surface of the resin layer; a light wavelength conversion layer disposed on one surface of the resin layer; and a colored optical layer disposed on the resin layer, wherein the light wavelength conversion layer includes regions with different concentrations of phosphors, wherein the light wavelength conversion layer includes a main phosphor patter disposed in a long axis direction of the resin layer and a plurality of sub phosphor patterns disposed on both sides of the mam phosphor pattern, wherein the plurality of sub phosphor patterns is disposed along both sides of the resin layer on the one side surface of said resin layer, wherein the plurality of sub-phosphor patterns is disposed in at least one of regions of the light wavelength conversion layer adjacent to the light emitting device, and wherein the colored optical layer emits light that has passed through the phosphors and limits an emission of light in the same wavelength range as a light emitted from the light emitting device. ### Claim 12 (depends on 11) The lighting device of claim 11, wherein the light wavelength conversion layer includes a first region where a phosphor of a first concentration is disposed, a second region where a phosphor of a second concentration is greater than the first concentration, and a third region where a phosphor of a third concentration is greater than the second concentration. ### Claim 13 (depends on 12) The lighting device of claim 12, wherein the light emitted from the light emitting device, converted to wavelength in the first to third regions, and passing through the colored optical layer are uniform. ### Claim 14 (depends on 12) The lighting device of claim 12, wherein the light emitting device emits blue light, wherein the light of the light emitting device that passes through the light wavelength conversion layer includes a wavelength range of 615 nm to 650 nm, wherein the colored optical layer is formed in red. ### Claim 15 (depends on 11) The lighting device of claim 11, wherein the resin layer includes a first surface facing the light emitting device, a second surface opposite the first surface, a bottom, and an upper surface opposite the bottom, wherein the light wavelength conversion layer is adhered to the bottom of the resin layer. ### Claim 16 (depends on 15) The lighting device of claim 15, wherein the bottom of the resin layer is flat and the upper surface of the resin layer has a convex curved surface. ### Claim 17 (depends on 16) The lighting device of claim 16, wherein both side surfaces of the resin layer extend vertically between a lower end of the convex curved surface and the bottom, wherein the both side surfaces of the resin layer and the upper surface have a long length in the long axis direction. ### Claim 18 (depends on 1) The lighting device of claim 1, wherein the resin layer includes a first surface facing the light emitting device, a second surface opposite the first surface, a bottom, and an upper surface opposite the bottom, wherein the light wavelength conversion layer is disposed at the bottom of the resin layer. ### Claim 19 (depends on 18) The lighting device of claim 18, wherein the bottom of the resin layer is flat, and the upper surface of the resin layer has a convex curved surface, wherein both side surfaces of the resin layer extend vertically between a lower end of the convex curved surface and the bottom. ### Claim 20 (depends on 18) The lighting device of claim 18, comprising: a reflective member having a receiving groove therein and a printed circuit board on which the light emitting device is mounted, wherein the reflective member includes an open upper portion, a bottom portion under the resin layer, and sidewall portions on both sides of the resin layer, wherein the reflective member is open on one side, wherein the light emitting device faces the first surface of the resin layer at the one open side of the reflective member, wherein the resin layer is disposed in the receiving groove of the reflective member, and wherein the light wavelength conversion layer disposed at the bottom of the resin layer is disposed on the bottom portion of the reflective member.