# US 10,865,971 B2 · Light source device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,971 B2 - Document ID: US10865971B2 - Status: Granted - Kind: B2 - Application number: 16/285,468 - Filed: 2019-02-26 - Published: 2019-08-29 - Granted: 2020-12-15 - Earliest claimed: 2018-02-28 - Assignees: Hamamatsu Photonics K.K. - Applicants: Hamamatsu Photonics K.K. - Inventors: Kyoichi Murayama; Yoshiteru Miyamoto; Hiroya Kashiwabara; Ryotaro Matui - Web page: https://patentgrep.com/patent/US10865971B2 ## CPC - F21V 29/677: {the fans being used for discharging} - B41J 11/00214: {using UV radiation} - B41J 11/00218: {Constructional details of the irradiation means, e.g. radiation source attached to reciprocating print head assembly or shutter means provided on the radiation source} - F21V 29/673: {the fans being used for intake} - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - B05D 3/067: {Curing or cross-linking the coating} - F21Y 2115/10: Light-emitting diodes [LED] - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - 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 A light source device includes a casing including one end surface, other end surface, and one side surface between the one end surface and the other end surface, a light emitting unit provided on a side of the one end surface in the casing, a heat radiating unit provided in the casing and thermally connected to the light emitting unit, an exhaust port formed at least in a region located in one side surface and facing the heat radiating unit, an axial fan which is provided in the casing and supplies cooling air to the heat radiating unit, and a shielding deflecting plate which is provided between the axial fan and the heat radiating unit and shields a part of the cooling air supplied from the axial fan and deflects a part of the cooling air to a direction away from the exhaust port. ## Claims ### Claim 1 A light source device comprising: a casing including one end surface, other end surface, and one side surface between the one end surface and the other end surface; a light emitting unit provided on a side of the one end surface in the casing; a heat radiating unit provided in the casing and thermally connected to the light emitting unit; an exhaust port formed at least in a region located in the one side surface and facing the heat radiating unit; an axial fan configured to be provided in the casing and supply cooling air to the heat radiating unit; and a shielding deflecting plate configured to be provided between the axial fan and the heat radiating unit and shield a part of the cooling air supplied from the axial fan and deflect a part of the cooling air to a direction away from the exhaust port, wherein a part of the cooling air that is not deflected by the shielding deflecting plate is introduced directly into the heat radiating unit, and wherein the shielding deflecting plate is arranged to extend at an angle which is not parallel to an axial direction of the axial fan, and the shielding deflecting plate is arranged at the angle with which a direction of the cooling air toward the one end surface is deflected to a side of another side surface facing the one side surface, wherein the shielding deflecting plate extends from a mounting plate attached to the side of the one end surface of the axial fan, the mounting plate having an opening corresponding to an air supply port of the axial fan. ### Claim 2 (depends on 1) The light source device according to claim 1, wherein the axial fan includes an impeller including a hub and a plurality of blades provided around the hub, and the shielding deflecting plate is arranged to cover a part of the axial fan as viewed from an axial direction of the axial fan and has a width corresponding to a length from a base end to a front end of the blade. ### Claim 3 (depends on 1) The light source device according to claim 1, wherein the axial fan is fixed to a fixing plate, and the mounting plate clamps the axial fan in cooperation with the fixing plate. ### Claim 4 (depends on 1) The light source device according to claim 1, further comprising: a plurality of axial fans configured to be provided in the casing and supply cooling air to the heat radiating unit, wherein the axial fan is one of the plurality of axial fans, and the plurality of axial fans are arranged in the casing side by side, wherein the shielding deflecting plate is a single shielding deflecting plate that is provided between the plurality of axial fans and the heat radiating unit and shields a part of the cooling air supplied from the plurality of axial fans and deflects a part of the cooling air to a direction away from the exhaust port, wherein the mounting plate having a plurality of openings, each opening corresponding to an air supply port of an axial fan of the plurality of axial fans. ### Claim 5 (depends on 1) The light source device according to claim 1, wherein the exhaust port is formed in a rear half of a region located in the one side surface and facing the heat radiating unit. ### Claim 6 (depends on 1) The light source device according to claim 1, further comprising: a rectifying plate extended from a periphery of the exhaust port in the one side surface toward the side of the one end surface in the casing and inclined with respect to the one side surface. ### Claim 7 (depends on 1) The light source device according to claim 1, wherein the exhaust port is a hole formed in the one side surface, and the exhaust ports are arranged in a honeycomb shape in the one side surface. ### Claim 8 (depends on 1) The light source device according to claim 1, wherein the axial fan is arranged at a position where a distance to the heat radiating unit is equal to or shorter than a distance to the other end surface.