# US 11,309,463 B2 · Light emitting device, light illuminating module and light illuminating apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,463 B2 - Document ID: US11309463B2 - Status: Granted - Kind: B2 - Application number: 15/941,506 - Filed: 2018-03-30 - Published: 2018-10-04 - Granted: 2022-04-19 - Earliest claimed: 2017-03-31 - Assignees: Hoya Corporation - Applicants: Hoya Candeo Optronics Corporation - Inventors: Taiji Mizuta - Web page: https://patentgrep.com/patent/US11309463B2 ## CPC - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H 20/853: characterised by their shape - H10W 90/00: Package configurations - H10H 20/0362: {of encapsulations} - H10H 20/0363: {of optical field-shaping means} - H10H 20/819: characterised by their shape, e.g. curved or truncated substrates - 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 light emitting device includes a substrate, a LED element placed on the substrate, and a lens placed on an optical path of the LED element, wherein the lens has a convex part protruding in a direction of an optical axis of the lens in a central part of an exit surface of the lens. ## Claims ### Claim 1 A light emitting device, comprising: a substrate; multiple LED elements on the substrate, M LED elements being one unit, in which M is an integer greater than 1; and multiple lenses on the substrate, such than an optical path of each of the M LED elements passes through a respective lens among the multiple lenses, wherein the M LED elements are encapsulated in each of the multiple lenses, wherein each of the multiple lenses has a convex part that acts as an identification mark for identifying the M LED elements encapsulated in each of the multiple lens, the convex part being formed in a central part of an outer surface of each of the multiple lens and protruding in a direction of an optical axis of each of the multiple lenses, and wherein a shape of the convex part varies according to a type of the M LED elements in each of the multiple lenses, such that the type of the M LED elements is identifiable based on the shape of the respective convex part, wherein, when viewed in the direction of the optical axis, the convex part of each of the multiple lenses is entirely disposed within an outer periphery of each of the multiple lenses. ### Claim 2 (depends on 1) The light emitting device according to claim 1, wherein the multiple LED elements include N types of LED elements with different characteristics, in which N is an integer equal to or greater than 2. ### Claim 3 (depends on 2) The light illuminating module according to claim 2, wherein the characteristic is a light emission wavelength of the multiple LED elements. ### Claim 4 (depends on 1) The light illuminating module according to claim 1, wherein one of the multiple lenses has a shape of a hemisphere with an approximately circular cross section in a direction perpendicular to the optical axis, or an elliptical hemisphere with an approximately elliptical cross section in a direction perpendicular to the optical axis. ### Claim 5 (depends on 4) The light illuminating module according to claim 4, wherein said one of the multiple lenses satisfies the following conditional expression (4) when a maximum diameter of said one of the multiple lenses when viewed in the direction of the optical axis is Φ and a diameter of a circumcircle of the convex part is d: d/Φ≤0.50, d≥0.3mm (4). ### Claim 6 (depends on 1) The light illuminating module according to claim 1, wherein one of the multiple lenses has a shape of a cannonball with an approximately circular or approximately elliptical cross section in a direction perpendicular to the optical axis. ### Claim 7 (depends on 6) The light illuminating module according to claim 6, wherein said one of the multiple lenses satisfies the following conditional expression (5) when a maximum diameter of said one of the multiple lenses when viewed in the direction of the optical axis is Φ and a height of said one of the multiple lenses in the direction of the optical axis it T: 0.31≤T/Φ≤0.90 (5). ### Claim 8 (depends on 5) The light illuminating module according to claim 5, wherein the M LED elements of each respective LED unit are arranged in a rectangular area when viewed in the direction of the optical axis, and each of the multiple lenses satisfies the following conditional expression (6) when a length of a long side of the area is s: 0.10≤s/Φ≤0.60 (6). ### Claim 9 (depends on 1) The light illuminating module according to claim 1, wherein the convex part of each of the multiple lenses protrudes in an approximately circular, approximately elliptical or approximately polygonal shape when viewed in the direction of the optical axis of each of the multiple lenses. ### Claim 10 (depends on 1) The light illuminating module according to claim 1, wherein the M LED elements are configured to emit light having a wavelength in the ultraviolet region of light capable of curing ultraviolet curable resin. ### Claim 11 (depends on 1) A light illuminating apparatus comprising multiple light illuminating modules, each of which is the light illuminating module defined in claim 1. ### Claim 12 (depends on 1) The light illumination module according to claim 1, wherein the convex part of each of the multiple lenses is exposed to an exterior. ### Claim 13 (depends on 9) The light illuminating module according to claim 9, wherein the approximately circular, approximately elliptical or approximately polygonal shape, when viewed in the direction of the optical axis, is entirely disposed within the outer periphery of each lens.