# US 10,441,937 B2 · Light irradiation device and light irradiation system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,441,937 B2 - Document ID: US10441937B2 - Status: Granted - Kind: B2 - Application number: 15/767,216 - Filed: 2016-10-28 - Published: 2019-03-07 - Granted: 2019-10-15 - Earliest claimed: 2015-10-29 - Assignees: KYOCERA Corporation - Applicants: KYOCERA Corporation - Inventors: Akira Taguchi - Web page: https://patentgrep.com/patent/US10441937B2 ## CPC - B41J 11/00214: {using UV radiation} - B01J 19/12: employing electromagnetic waves - B29C 35/08: by wave energy or particle radiation {(B29C64/00, B29C71/04 take precedence)} - B41J 2/01: Ink jet - B41J 2/447: using arrays of radiation sources (B41J2/475 takes precedence) - H10F 55/00: Radiation-sensitive semiconductor devices covered by groups H10F10/00, H10F19/00 or H10F30/00 being structurally associated with electric light sources and electrically or optically coupled thereto - H10F 55/25: wherein the radiation-sensitive devices and the electric light source are all semiconductor devices - H10F 77/407: {indirectly associated with the devices} - H10F 77/50: Encapsulations or containers (for photovoltaic modules H10F19/80) - H10H 20/85: Packages - H10W 90/00: Package configurations - B29C 2035/0827: {using UV radiation} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - 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 There are provided a light irradiation device and a light irradiation system which are capable of correcting changes in optical power output. A light irradiation device includes: a substrate having an upper surface provided with a first recess and a second recess; a light-emitting element located in the first recess, the light-emitting element emitting ultraviolet light; and a detecting element located in the second recess, the detecting element being capable of detecting ultraviolet light. ## Claims ### Claim 1 A light irradiation device, comprising: a substrate having an upper surface provided with a first recess and a second recess; a light-emitting element located in the first recess, the light-emitting element emitting ultraviolet light; a detecting element located in the second recess, the detecting element being capable of detecting ultraviolet light that is emitted from the light-emitting element and transmitted through the substrate; and an ultraviolet shield member which covers the detecting element in a state of being be apart therefrom, wherein the ultraviolet shield member closes an opening of the second recess, and is capable of transmitting infrared light. ### Claim 2 (depends on 1) The light irradiation device according to claim 1, wherein the substrate has a portion through which ultraviolet light emitted from the light-emitting element can be transmitted, and the portion is located between the first recess and the second recess. ### Claim 3 (depends on 1) The light irradiation device according to claim 1, further comprising: a lens which covers the light-emitting element in a state of being apart therefrom. ### Claim 4 (depends on 3) The light irradiation device according to claim 3, wherein the lens closes an opening of the first recess. ### Claim 5 (depends on 1) The light irradiation device according to claim 1, wherein the detecting element is capable of detecting infrared light. ### Claim 6 (depends on 5) A light irradiation system, comprising: the light irradiation device according to claim 5; a constant current control section which produces a constant current for driving the light irradiation device; and an abnormality determination section which determines that the light irradiation device is abnormal when a result of infrared detection by the detecting element is out of a predetermined range. ### Claim 7 (depends on 1) The light irradiation device according to claim 1, further comprising: a second detecting element which is located in the second recess and is capable of detecting infrared light. ### Claim 8 (depends on 1) The light irradiation device according to claim 1, wherein the upper surface of the substrate is provided with a third recess, and the light irradiation device further comprises a third detecting element which is located in the third recess and is capable of detecting infrared light. ### Claim 9 (depends on 1) The light irradiation device according to claim 1, further comprising: a heat-dissipating member joined to a lower surface side of the substrate. ### Claim 10 (depends on 1) A light irradiation system, comprising: the light irradiation device according to claim 1; a constant current control section which produces a constant current for driving the light irradiation device; and a driving current computing section which computes a current value of the constant current based on a result of ultraviolet detection by the detecting element, and outputs the current value to the constant current control section. ### Claim 11 A light irradiation device, comprising: a substrate having an upper surface provided with a plurality of first recesses and a second recess; a light-emitting element located in at least one of the plurality of first recesses, the light-emitting element emitting ultraviolet light; a detecting element located in the second recess, the detecting element being capable of detecting ultraviolet light that is emitted from the light-emitting element and transmitted through a portion of the substrate; and an ultraviolet shield member which covers the detecting element in a state of being be apart therefrom, wherein the ultraviolet shield member closes an opening of the second recess, and is capable of transmitting infrared light; wherein the portion of the substrate is located between the plurality of first recesses and the second recess and the portion of the substrate is smaller in thickness than a second portion of the substrate located between adjacent ones of the plurality of first recesses.