# US 2014/0153249 A1 · Bulb-Type LED Lamp > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153249 A1 - Document ID: US20140153249A1 - Status: Published application - Kind: A1 - Application number: 14/173,251 - Filed: 2014-02-05 - Published: 2014-06-05 - Earliest claimed: 2011-09-22 - Assignees: Toshiba Lighting & Technology Corporation - Applicants: Toshiba Lighting & Technology Corporation - Inventors: Takeshi Hisayasu; Hiroshi Kubota; Shinji Nakata; Makoto Sakai; Hiroshi Takenaga - Web page: https://patentgrep.com/patent/US20140153249A1 ## CPC - F21V 3/02: characterised by the shape - F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb - F21K 9/61: using light guides - F21Y 2103/30: curved - F21Y 2103/33: annular - 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 - 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 - 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 An LED lamp according to an embodiment includes an LED module, a base body, a first globe, a second globe and a light guide body. In the LED module, a plurality of LEDs are mounted on a substrate. The base body holds the LED module. The first globe is arranged to surround the outer circumference of the substrate. A bore diameter (D2) of a first joining end is larger than a bore diameter (D1) of an attachment section. The second globe includes a second joining end attached to the first joining end and covers the emission side of the LEDs. A proximal end of the light guide body is fixed to a side where the LEDs are arranged. A distal end section of the light guide body has a diameter larger than the bore diameter (D1) of the attachment section of the first globe. ## Claims ### Claim 1 An LED lamp comprising: an LED module in which a plurality of LEDs are arranged in a ring shape and mounted on a substrate; a base body configured to hold the LED module; a first globe arranged to surround an outer circumference of the substrate, a bore diameter of a first joining end of the first globe extending to an emission side of the LEDs being larger than a bore diameter of an attachment section fixed to the base body; a second globe including a second joining end attached to the first joining end and configured to cover the emission side of the LEDs; and a light guide body including a proximal end fixed to a side where the LEDs are arranged and a distal end section having a diameter larger than the bore diameter of the attachment section of the first globe. ### Claim 2 (depends on 1) The LED lamp according to claim 1, wherein the light guide body warps to an outer circumferential side of the substrate from the proximal end to the distal end section, and the distal end section is arranged further on the substrate side than the first joining end. ### Claim 3 (depends on 1) The LED lamp according to claim 1, wherein the light guide body includes an incident section configured to cover at least a part of the emission side of the LEDs. ### Claim 4 (depends on 1) The LED lamp according to claim 1, wherein the distal end section of the light guide body has an outer diameter larger than a circle circumscribing the substrate. ### Claim 5 (depends on 1) The LED lamp according to claim 1, wherein the distal end section of the light guide body has an outer diameter larger than an outer diameter of a seat of the base body for holding the substrate. ### Claim 6 (depends on 1) The LED lamp according to claim 1, wherein the attachment section of the first globe is fixed to the base body in a position further retracted than the substrate with respect to a direction in which the LEDs emit lights. ### Claim 7 (depends on 1) The LED lamp according to claim 1, wherein the first joining end of the first globe and the second joining end of the second globe have an outer diameter larger than an outer diameter of the distal end section of the light guide body. ### Claim 8 (depends on 1) The LED lamp according to claim 1, wherein the first joining end includes a concave section in a position in a center in a thickness direction in which lights emitted from the LEDs are transmitted, the second joining end includes a convex section corresponding to the concave section, and the concave section and the convex section are fit with each other. ### Claim 9 An LED lamp comprising: an LED module in which a plurality of LEDs are arranged in a ring shape and mounted on a substrate; a base body configured to hold the LED module and thermally connected to the LED module; a first globe arranged to surround an outer circumference of the substrate, a bore diameter of a first joining end of the first globe extending to an emission side of the LEDs being larger than a bore diameter of an attachment section fixed to the base body; a second globe including a second joining end attached to the first joining end and configured to cover the emission side of the LEDs; a light guide body including a proximal end fixed to a side where the LEDs are arranged and a distal end section having a diameter larger than the bore diameter of the attachment section of the first globe and arranged further on the substrate side than the first joining end; and fins including, at ends on the substrate side, inclined sections arranged perpendicularly to the substrate in an outer circumference of the base body and formed to be reduced in height toward the substrate, the fins radiating heat generated by the LEDs. ### Claim 10 (depends on 9) The LED lamp according to claim 9, wherein the first globe includes an outer peripheral wall extending along a conical surface that passes tops of the fins.