# US 2014/0192528 A1 · Light-Emitting Device and Luminaire > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192528 A1 - Document ID: US20140192528A1 - Status: Published application - Kind: A1 - Application number: 14/239,898 - Filed: 2011-09-26 - Published: 2014-07-10 - Earliest claimed: 2011-09-26 - Assignees: Toshiba Lighting & Technology Corporation - Inventors: Masaru Inoue; Makoto Kawagoe; Junya Hayashi; Masaru Matsuno - Web page: https://patentgrep.com/patent/US20140192528A1 ## CPC - F21V 5/02: of prismatic shape (F21V5/04 takes precedence) - F21S 8/04: intended only for mounting on a ceiling or the like overhead structures (F21S8/02 takes precedence; {details of ceiling bases F21V21/03}) - F21V 7/0008: {providing for indirect lighting} - F21V 7/0033: {with successive reflections from one reflector to the next or following} - F21V 7/048: {with facets structure} - F21V 7/06: with parabolic curvature - F21V 13/04: the elements being reflectors and refractors {(for vehicle rear lights F21S43/40)} - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - H10H 20/856: Reflecting means - F21V 23/008: {the casing being outside the housing of the lighting device} - F21V 29/507: of means for protecting lighting devices from damage, e.g. housings - F21Y 2103/10: comprising a linear array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - G02B 6/0038: {Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide} - G02B 6/0048: {with stepwise taper} - G02B 6/0055: {Reflecting element, sheet or layer} - 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 - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - 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 - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A light-emitting device and a luminaire that can reduce glare are provided. A light-emitting device according to an embodiment includes a substrate, an LED chip mounted on the lower surface of the substrate, a light reflecting member arranged downward and on one side when viewed from the LED chip and opened on the other side, a surface of the light reflecting member opposed to the LED chip being a light reflecting surface, and an optical member configured to guide light emitted from the LED chip and reflected by the light reflecting member downward. ## Claims ### Claim 1 A light-emitting device comprising: a substrate; an LED chip mounted on a lower surface of the substrate; a light reflecting member arranged downward and on one side when viewed from the LED chip and opened on the other side, a surface of the light reflecting member opposed to the LED chip being a light reflecting surface; and an optical member configured to guide light emitted from the LED chip and reflected by the light reflecting member downward. ### Claim 2 (depends on 1) The light-emitting device according to claim 1, wherein the optical member includes a light diffusing and reflecting plate, a lower surface of which is a light diffusing and reflecting surface, and a part of the light reflected by the light reflecting member is irradiated on the lower surface of the light diffusing and reflecting plate. ### Claim 3 (depends on 2) The light-emitting device according to claim 2, wherein an end on the other side on the lower surface of the light diffusing and reflecting plate is located below an end on the one side on the lower surface. ### Claim 4 (depends on 3) The light-emitting device according to claim 3, wherein the lower surface of the light diffusing and reflecting plate is a concave curved surface. ### Claim 5 (depends on 2) The light-emitting device according to claim 2, wherein the lower surface of the light diffusing and reflecting plate is a white surface. ### Claim 6 (depends on 2) The light-emitting device according to claim 2, further comprising a prism plate, on an upper surface of which a plurality of prisms are formed, wherein among lights emitted from the LED chip, a part of lights not irradiated on the light reflecting member are irradiated on the upper surface. ### Claim 7 (depends on 1) The light-emitting device according to claim 1, wherein the optical member includes a prism plate, an end on the other side on an upper surface of which is located above an end on the one side thereof, and the light reflected by the light reflecting member is irradiated on the upper surface of the prism plate. ### Claim 8 (depends on 1) The light-emitting device according to claim 1, wherein the light reflecting surface of the light reflecting member is a mirror surface. ### Claim 9 (depends on 1) The light-emitting device according to claim 1, wherein the light reflecting surface of the light reflecting member is a parabolic cylindrical surface. ### Claim 10 (depends on 1) The light-emitting device according to claim 1, wherein a shape of the substrate is a belt shape extending in a direction crossing both of a direction from the one side to the other side and an up down direction, and a plurality of the LED chips are arrayed along the crossing direction. ### Claim 11 A luminaire comprising: a light-emitting device; and a chassis configured to cover an upper surface of the light-emitting device, wherein the light-emitting device includes: a substrate; an LED chip mounted on a lower surface of the substrate; and a light reflecting member arranged downward and on one side when viewed from the LED chip and opened on the other side, a surface of the light reflecting member opposed to the LED chip being a light reflecting surface, and heat of the LED chip is transmitted to the chassis by heat conduction. ### Claim 12 (depends on 11) The luminaire according to claim 11, wherein a shape of the substrate is a belt shape extending in a direction crossing both of a direction from the one side to the other side and an up down direction, and a plurality of the LED chips are arrayed along the crossing direction. ### Claim 13 (depends on 11) The luminaire according to claim 11, wherein a shape of the chassis is a tray shape, and the light-emitting device is arranged on an inside of the chassis. ### Claim 14 (depends on 13) The luminaire according to claim 13, further comprising: a control unit configured to control the light-emitting device; and a power supply unit arranged on an outside of the chassis and configured to supply electric power to the control unit. ### Claim 15 (depends on 14) The luminaire according to claim 14, wherein the control unit is arranged below the light reflecting member. ### Claim 16 (depends on 14) The luminaire according to claim 14, wherein a plurality of the light-emitting devices are provided, and the control unit is provided in common to the plurality of light-emitting devices. ### Claim 17 (depends on 11) The luminaire according to claim 11, wherein the light-emitting device further includes an optical member configured to guide light emitted from the LED chip and reflected by the light reflecting member downward. ### Claim 18 (depends on 17) The luminaire according to claim 17, wherein the optical member includes a light diffusing and reflecting plate, a lower surface of which is a light diffusing and reflecting surface, the light reflected by the light reflecting member is irradiated on the lower surface of the light diffusing and reflecting plate, the substrate is in contact with the light diffusing and reflecting plate, and the light diffusing and reflecting plate is in contact with the chassis. ### Claim 19 (depends on 11) The luminaire according to claim 11, wherein the chassis is formed of metal. ### Claim 20 (depends on 17) The luminaire according to claim 17, wherein the optical member includes a prism plate, on an upper surface of which a plurality of prisms are formed, among lights emitted from the LED chip, a part of lights not irradiated on the light reflecting member are irradiated on the upper surface of the prism plate, and a side surface on the other side in the prism plate is not covered with the chassis and is exposed to an outside.