JP2013012453A - Led lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp capable of illuminating a wider area.SOLUTION: The LED lamp 101 is provided with an LED light-emitting part 200 with one or more LED chips, a substrate 410 having a mounting face 411 with the LED light-emitting part 200 mounted, and a globe 500 covering the LED light-emitting part 200 and transmitting the light from the LED light-emitting part 200. The globe 500 is expanded to a front side of the mounting face 411 and has a rotation symmetrical shape with an axis along an x-direction extended to a top 504 of the globe 500 from the substrate 410 as a rotation symmetrical axis O1. A plurality of ridge parts 510 each of a ring shape and with the rotation symmetrical axis O1 as its center, and arrayed in the x-direction are provided on an outer peripheral surface of the globe 500. Each of the ridge parts 510 has: an optical path change surface 511 positioned in a front side in x-direction and refracting light from the LED light-emitting part 200; and a connecting surface 512 located on the opposite side from the optical path change surface 511.

Description

  The present invention relates to an LED lamp including an LED chip as a light source.

  As an alternative to so-called incandescent bulbs, LED lamps on which LED chips are mounted are becoming popular. LED lamps have advantages such as power saving and long life over incandescent bulbs.

  FIG. 24 shows an example of a conventional LED lamp (see, for example, Patent Document 1). The LED lamp 900 shown in the figure is configured to be used as an alternative to an incandescent bulb, and includes an LED substrate 901, a plurality of LED chips 902, a base 903, a power supply unit 904, a base 905, and a globe 906. It has. The plurality of LED chips 902 are light sources of the LED lamp 900 and are mounted on the LED substrate 901. The LED substrate 901 is made of an insulating material and is fixed to the base 903. The base 903 is made of a metal such as aluminum, for example, and plays a role of dissipating heat from the plurality of LED chips 902 to the outside. The base 905 is a part for attaching the LED lamp 900 to a lighting fixture or the like, and has a specification defined in, for example, the JIS standard. The globe 906 protects the plurality of LED chips 902 and transmits light from the LED chips 902.

  Since the light emitted from the LED chip 902 has a relatively high directivity, it is difficult for the LED lamp 900 shown in FIG. 24 to reach the side (left and right in the figure). For this reason, when the LED lamp 900 is used in place of a general incandescent lamp and attached to a luminaire, there is a disadvantage that the illuminated range is narrowed.

JP 2010-225409 A

  The present invention has been conceived under the circumstances described above, and an object thereof is to provide an LED lamp capable of illuminating a wider range.

  The LED lamp provided by the first aspect of the present invention covers an LED light emitting unit having one or more LED chips, a support unit having a mounting surface on which the LED light emitting unit is mounted, and the LED light emitting unit, And a glove that transmits light from the LED light emitting unit, the glove bulging to the front side of the mounting surface, and an axis along a first direction extending from the support unit to the apex of the glove. The LED lamp has a rotationally symmetric shape with a rotationally symmetric axis as a ring, and each of the outer circumferential surfaces of the globe has a ring shape centered on the rotationally symmetric axis and a plurality of rows arranged in the first direction. A chevron is provided, and each chevron is located near the first direction and is located on the opposite side of the optical path changing surface that refracts light from the LED light emitting part and the optical path changing surface. Connection It is characterized by having, when.

  In a preferred embodiment of the present invention, each of the optical path changing surfaces is inclined with respect to a first surface perpendicular to a straight line extending from the intersection of the rotational symmetry axis and the mounting surface to the optical path changing surface, Each of the optical path changing surfaces is inclined closer to a second surface that passes through the top of the globe and is perpendicular to the rotational symmetry axis than the first surface.

  In a preferred embodiment of the present invention, each of the connection surfaces has a shape substantially along a side surface of a cone whose generating line is a straight line extending from the intersection of the rotational symmetry axis and the mounting surface.

  In a preferred embodiment of the present invention, the glove has a dome-shaped portion with the apex at the top, and a constricted portion that is connected to the support portion side with respect to the dome-shaped portion and narrows toward the support portion. And have.

  In a preferred embodiment of the present invention, an AR coat is applied to the optical path changing surface.

  In a preferred embodiment of the present invention, an additional optical path changing surface that is formed on the inner peripheral surface of the globe by rotation of an elliptical arc having the rotational symmetry axis as a major axis and refracts light from the LED light emitting unit. Is provided.

  In a preferred embodiment of the present invention, each of the LED light emitting sections includes the LED chip, and includes one or more LED modules mounted on the mounting surface.

  In a preferred embodiment of the present invention, a plurality of the LED modules are arranged in a matrix on the mounting surface.

  In a preferred embodiment of the present invention, the LED light emitting unit has an LED substrate attached to the support unit and mounted with a plurality of LED chips.

  In a preferred embodiment of the present invention, the support portion includes a bulge portion that bulges in the first direction, and the LED light emitting portion is supported by the bulge portion.

  In a preferred embodiment of the present invention, the bulging portion has a circular top plate located near the top of the globe and a cylindrical portion connected to the top plate, and the LED light emitting portion is the top plate. It is supported by the plate and the cylindrical part.

  In a preferred embodiment of the present invention, the cylindrical portion has a smaller diameter toward the top plate.

  In a preferred embodiment of the present invention, the LED light emitting section includes a plurality of LED modules each including the LED chip, and the plurality of LED modules are mounted on a flexible wiring board attached to the bulging section. It is installed.

  The LED lamp provided by the second aspect of the present invention covers an LED light emitting unit having one or more LED chips, a support unit having a mounting surface on which the LED light emitting unit is mounted, and the LED light emitting unit, And a cover that transmits light from the LED light emitting section, the cover bulging to the front side of the mounting surface, and perpendicular to a first direction extending from the support section to the top of the cover. An LED lamp extending in a second direction, wherein a plurality of chevron portions each extending in the second direction and arranged in the first direction are provided on the outer peripheral surface of the cover. The portion has an optical path changing surface that is located closer to the first direction and that refracts light from the LED light emitting portion, and a connection surface that is located on the opposite side of the optical path changing surface. .

  In a preferred embodiment of the present invention, each of the optical path changing surfaces is perpendicular to a straight line extending to the optical path changing surface in a vertical plane in the second direction from an intersection of the axis along the first direction and the mounting surface. The optical path changing surfaces are inclined more toward the second surface that passes through the top of the cover and is perpendicular to the axis than the first surface.

  In a preferred embodiment of the present invention, each of the connection surfaces includes a straight line extending in a vertical plane in the second direction from an intersection of the axis and the mounting surface.

  In a preferred embodiment of the present invention, an AR coat is applied to the optical path changing surface.

  In a preferred embodiment of the present invention, the inner peripheral surface of the cover is formed in an elliptical arc shape having the long axis as the major axis in the vertical plane in the second direction, and refracts light from the LED light emitting unit. An additional optical path changing surface is provided.

  In a preferred embodiment of the present invention, each of the LED light emitting sections includes the LED chip, and includes one or more LED modules mounted on the mounting surface.

  In a preferred embodiment of the present invention, the LED light emitting unit has an LED substrate attached to the support unit and mounted with a plurality of LED chips.

  In a preferred embodiment of the present invention, the support portion includes a bulge portion that bulges in the first direction, and the LED light emitting portion is supported by the bulge portion.

  The LED lamp provided by the third aspect of the present invention covers an LED light emitting unit having one or more LED chips, a support unit having a mounting surface on which the LED light emitting unit is mounted, and the LED light emitting unit, And a cover that transmits light from the LED light emitting section, the cover bulging to the front side of the mounting surface, and perpendicular to a first direction extending from the support section to the top of the cover. An LED lamp extending in a second direction, wherein a plurality of chevron portions extending in the second direction and arranged in the first direction are provided on the inner peripheral surface of the cover, The chevron part has an optical path changing surface that is located closer to the first direction and that refracts light from the LED light emitting part, and a connection surface that is located on the opposite side of the optical path changing surface. Yes.

  In a preferred embodiment of the present invention, each of the optical path changing surfaces includes a projection point obtained by projecting the top portion onto the mounting surface, and any point on the optical path changing surface, along the second direction. A first angle formed between the extending third surface and the optical path changing surface on the opposite side of the first direction is configured to be less than 90 degrees.

  In a preferred embodiment of the present invention, the first angle is set to be smaller as it is located in a direction opposite to the first direction with respect to the optical path changing surface.

  In a preferred embodiment of the present invention, each of the connection surfaces includes a straight line extending in the vertical plane in the second direction from the projection point.

  In a preferred embodiment of the present invention, the outer peripheral surface of the cover has a circular shape centered on a point located closer to the first direction than the mounting surface in the vertical plane in the second direction. Yes.

  In a preferred embodiment of the present invention, the plurality of chevron portions are provided in all regions from a portion corresponding to the top portion to a portion corresponding to the mounting surface rather than the center.

  In a preferred embodiment of the present invention, each of the optical path changing surfaces has refracted light that is refracted by the light from the LED light-emitting unit in the vertical plane in the second direction on the inner side of the cover. When extended, the extended line passes through the center.

  In a preferred embodiment of the present invention, the LED light emitting section includes a plurality of the LED chips, and the plurality of LED chips are arranged in a line along the second direction on the mounting surface. Has been.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a front view which shows the LED lamp based on 1st Embodiment of this invention. It is sectional drawing which follows the II-II line | wire of FIG. It is a top view which shows arrangement | positioning of the LED module of the LED lamp of FIG. It is a figure for demonstrating the outer peripheral surface shape of the glove used for the LED lamp of FIG. It is principal part sectional drawing showing the cross section similar to FIG. It is sectional drawing which shows the LED module of the LED lamp of FIG. It is a top view which shows arrangement | positioning of an LED module. It is sectional drawing similar to FIG. 2 which shows the LED lamp based on 2nd Embodiment of this invention. It is sectional drawing which shows the LED light emission part of the LED lamp of FIG. It is a top view which shows arrangement | positioning of the LED light emission part of the LED lamp of FIG. It is sectional drawing similar to FIG. 2 which shows the LED lamp based on 3rd Embodiment of this invention. It is a perspective view which shows the bulging part of the LED lamp of FIG. It is a perspective view showing the LED lamp based on 4th Embodiment of this invention in a partial cross section. It is sectional drawing of the LED lamp of FIG. It is a perspective view showing the LED lamp based on 5th Embodiment of this invention in a partial cross section. It is sectional drawing of the LED lamp of FIG. It is a perspective view showing the LED lamp based on 6th Embodiment of this invention in a partial cross section. It is sectional drawing of the LED lamp of FIG. It is a perspective view showing the LED lamp based on 7th Embodiment of this invention in a partial cross section. It is sectional drawing of the LED lamp of FIG. It is a figure for demonstrating the internal peripheral surface shape of the cover used for the LED lamp of FIG. It is a principal part enlarged view of FIG. It is a principal part expanded sectional view which follows the XXIII-XXIII line | wire of FIG. It is sectional drawing which shows an example of the conventional LED lamp.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 and 2 show an LED lamp according to a first embodiment of the present invention. The LED lamp 101 of this embodiment includes an LED light emitting unit 200, a base 300, a power supply unit 400, a globe 500, and a base 600. The LED lamp 101 is used by being attached to a lighting fixture for an incandescent bulb as an alternative product to the incandescent bulb. The LED lamp 101 has a size corresponding to, for example, a 60 W type bulb, and has a diameter of about 55 mm and a height of about 108 mm.

  In the present embodiment, the LED light emitting unit 200 includes a plurality of LED modules 201. As shown in FIG. 6, the LED module 201 includes an LED chip 202, a pair of leads 203, a case 205, a sealing resin 206, and wires 207. The pair of leads 203 is made of, for example, a Cu alloy, and the LED chip 202 is mounted on one of them. A surface of the lead 203 opposite to the surface on which the LED chip 202 is mounted is a mounting terminal 204 used for surface mounting the LED module 201. The LED chip 202 is a light source of the LED module 201 and can emit blue light, for example. The sealing resin 206 is for protecting the LED chip 202. The sealing resin 206 is formed using a light-transmitting resin including a fluorescent material that emits yellow light when excited by light from the LED chip 202. As said fluorescent substance, it may replace with what emits yellow light, and may mix and use what emits red light, and what emits green light. The case 205 is made of, for example, a white resin, and reflects light emitted from the LED chip 202 to the side.

  Each LED module 201 having the above configuration is mounted on a mounting surface 411 (an upper surface in FIG. 2) of a substrate 410 to be described later. As shown in FIG. 3, in the present embodiment, the plurality of LED modules 201 are arranged in a matrix. In the drawings, the traveling direction of the light emitted from the LED light emitting unit 200 (LED module 201) is appropriately indicated by using arrows.

  As shown in FIGS. 1 and 2, the base 300 includes a main body 310 and a spacer 320 in the present embodiment. The base 300 supports the LED module 201 (LED light emitting unit 200) via the substrate 410. The base 300 and the substrate 410 constitute a support part of the present invention. The material of the base 300 is preferably a material having high thermal conductivity, and for example, a metal such as aluminum is used. Unlike the present embodiment, the base 300 may be formed as an integrally molded product.

  The main body 310 has a shape similar to a trumpet as a whole and includes a plurality of fins 311. The plurality of fins 311 are formed radially outward. The main body 310 is formed with a power supply accommodating recess 312. The power supply accommodating recess 312 is a part that accommodates at least a part of the power supply unit 400, and accommodates most of the power supply unit 400 in this embodiment. The spacer 320 has a disk shape and is attached to the upper end of the main body 310 in the drawing. An opening 321 is formed in the spacer 320. The opening 321 is provided to avoid interference with the LED module 201.

  The power supply unit 400 generates DC power suitable for lighting the LED light emitting unit 200 (LED mochip 202) from a commercial AC 100V power supply, for example, and supplies this DC power to the LED light emitting unit 200 (LED chip 202). As shown in FIG. 2, a substrate 410 and a plurality of electronic components 420 are provided.

  The board | substrate 410 is used for the thing excellent in thermal conductivity, for example, consists of a glass composite copper clad laminated board. The substrate 410 has a circular shape as a whole. A plurality of electronic components 420 are mounted on the lower surface of the substrate 410 in the drawing. A wiring pattern (not shown) serving as a path for supplying power to the LED chip 202 is appropriately formed on the lower surface in the drawing and the upper surface in the drawing. The wiring pattern on the upper surface and the wiring pattern on the lower surface are defined as follows. For example, they are appropriately conducted through through holes. The substrate 410 is fixed to the base 300 with its peripheral edge sandwiched between the main body 310 of the base 300 and the spacer 320.

  The plurality of electronic components 420 function to convert, for example, a commercial AC 100V power source into DC power suitable for lighting the LED light emitting unit 200 (LED chip 202). The plurality of electronic components 420 include, for example, a capacitor, a resistor, a coil, a diode, an IC, and the like. For example, in FIG. 2, the electronic component 420 that protrudes most downward in the figure at approximately the center of the power supply accommodating recess 312 is a capacitor.

  The base 600 is a part that is attached to, for example, a general light fixture for a light bulb that complies with JIS standards. The base 600 is configured to satisfy specifications such as E17 and E26 defined in the JIS standard. The base 600 is connected to the power supply unit 400 by wiring.

  The globe 500 bulges to the front side of the mounting surface 411 of the substrate 410 and covers the LED light emitting unit 200 (LED module 201). The globe 500 transmits light emitted from the LED light emitting unit 200. The globe 500 is made of a resin having excellent translucency, and examples of the material of the globe 500 include highly transparent resins such as PMMA (polymethyl methacrylate) and polycarbonate.

  As shown in FIGS. 1 and 2, in the present embodiment, the globe 500 has a dome-shaped portion 501, a narrowed portion 502, and an insertion portion 503. The dome-shaped portion 501 is located in front of the mounting surface 411 and has a substantially hemispherical shape. The narrowed portion 502 is connected to the substrate 410 (mounting surface 411) side with respect to the dome-shaped portion 501. The constricted portion 502 is constricted as it approaches the substrate 410, and is, for example, an approximately partial spherical shape. The insertion portion 503 is used to fix the globe 500 to the base 300 by being inserted into a groove formed in the base 300. In the present embodiment, the globe 500 has a rotationally symmetric shape with an axis along the x direction (first direction) extending from the base 300 to the apex 504 of the globe 500 as a rotationally symmetric axis O1.

  As shown in FIGS. 1, 2, and 5, a plurality of chevron portions 510 are provided on the outer peripheral surface of the globe 500. Each of these chevron portions 510 has a ring shape centered on the rotational symmetry axis O1. The plurality of mountain-shaped portions 510 are arranged across the dome-shaped portion 501 and the narrowed portion 502 and are arranged in the x direction.

  Each chevron 510 has an optical path changing surface 511 located on the x direction side and a connecting surface 512 located on the opposite side of the optical path changing surface 511.

  The optical path changing surfaces 511 refract light from the LED light emitting unit 200 (LED module 201), and the adjacent optical path changing surfaces 511 are separated from each other. A method for determining the outer peripheral shape of the globe 500 according to the present embodiment will be described with reference to FIG. First, as shown in FIG. 4, an elliptical arc E <b> 1 serving as a reference for the shape of the globe 500 is set. The elliptical arc E <b> 1 is centered on the intersection 412 between the rotational symmetry axis O <b> 1 and the mounting surface 411, has the rotational symmetry axis O <b> 1 as a short axis, and passes through the vertex 504 of the globe 500. Next, each optical path changing surface 511 corresponding to each section is set on the basis of each section obtained by dividing the elliptical arc E1. Each optical path changing surface 511 is parallel to each corresponding section of the elliptic arc E1, and is moved to the inside of the elliptic arc E1. Accordingly, each optical path changing surface 511 is inclined with respect to a plane P1 (first surface) perpendicular to a straight line extending from the intersection 412 between the rotational symmetry axis O1 and the mounting surface 411 to the optical path changing surface 511. Each optical path changing surface 511 is inclined closer to the surface P2 (second surface) passing through the vertex 504 of the globe 500 and perpendicular to the rotational symmetry axis O1 than the surface P1. Here, “each optical path changing surface 511 is inclined closer to the surface P2 than the surface P1”, in other words, an angle formed by each optical path changing surface 511 and the surface P2 corresponds to the optical path changing surface 511. It means that the angle is smaller than the angle formed by the surface P1 and the surface P2. As can be understood from FIG. 4, the optical path changing surface 511 has a gentler slope than the corresponding surface P <b> 1 in the vertical direction in the drawing.

  As shown in FIGS. 2, 4, and 5, the connection surface 512 connects between the adjacent optical path changing surfaces 511. In this embodiment, as can be understood from FIG. 4, each connection surface 512 has a shape substantially along a side surface of a cone having a straight line extending from the intersection 412 as a generating line.

  In the present embodiment, an AR coat is applied to the outer peripheral surface of the globe 500.

  As shown in FIG. 2, an optical path changing surface 520 is provided on the inner peripheral surface of the globe 500. The optical path changing surface 520 corresponds to an example of an additional optical path changing surface referred to in the present invention, and has an elliptical arc rotation shape with the rotational symmetry axis O1 as a major axis.

  The globe 500 having the above configuration is integrally formed using, for example, a mold that can be separated into the left, right, and bottom three directions with reference to FIG.

  Next, the operation of the LED lamp 101 will be described.

  According to the present embodiment, the optical path changing surface 511 is provided on the outer peripheral surface of the globe 500. Each optical path changing surface 511 is inclined closer to the surface P2 than the surface P1 as described above with reference to FIG. With such a configuration, as shown in FIGS. 2 and 5, when the light from the LED light emitting unit 200 (LED module 201) reaches the optical path changing surface 511 and is emitted to the outside, the incident angle The refraction angle is larger than that. Thereby, the light emitted from the optical path changing surface 511 is refracted toward the side opposite to the x direction and travels in a direction of spreading with the x direction as a reference. As a result, light is emitted from the globe 500 toward a wider area than the light emitted from the LED light emitting unit 200 (LED module 201). Therefore, the LED lamp 101 can illuminate a wider range.

  A plurality of chevron portions 510 are provided in the x direction on the outer circumferential surface of the globe 500, and the optical path changing surface 511 is located closer to the x direction in the chevron portion 510. Since each optical path changing surface 511 is inclined closer to the surface P2 than the surface P1, the elliptical arc E1 shown in FIG. 4, for example, is substantially the same as the light emitting surface in the plurality of optical path changing surfaces 511 as a whole. Therefore, the same degree of light refraction can be expected. By such a device arrangement of the optical path changing surface 511, the LED lamp 101 can illuminate a wider range while reducing the size of the globe 500.

  An optical path changing surface 520 is formed on the inner peripheral surface of the globe 500, and the optical path changing surface 520 has an elliptical arc rotation shape with the rotational symmetry axis O1 as a major axis. With this configuration, as shown in FIGS. 2 and 5, when the light emitted from the LED light emitting unit 200 (LED module 201) reaches the optical path changing surface 520 and travels into the globe 500. The refraction angle is smaller than the incident angle. As a result, the light emitted from the LED light emitting unit 200 is refracted toward the side opposite to the x direction by the optical path changing surface 520 and travels in the direction of spreading in the globe 500 with reference to the x direction. Therefore, the light emitted from the LED light emitting unit 200 is expanded in two stages by the optical path changing surface 520 inside the globe 500 and the optical path changing surface 511 outside the globe 500 described above. This is suitable for illuminating a wider range by the LED lamp 101.

  As shown in FIG. 5, part of the light that travels inside the globe 500 and reaches the optical path changing surface 511 is reflected by the optical path changing surface 511 and travels diagonally downward in the drawing. In this embodiment, a narrowed portion 502 connected to the substrate 410 (mounting surface 411) side with respect to the dome-shaped portion 501 is provided. In the constricted portion 502, it is possible to avoid that the light reflected by the optical path changing surface 511 and traveling in the diagonally downward direction is unduly blocked by the mountain-shaped portion 510 positioned below. This is suitable for illuminating a wider range by the LED lamp 101.

  The connection surface 512 formed on the outer peripheral surface of the globe 500 has a shape substantially along the side surface of the cone having a straight line extending from the intersection 412 between the rotational symmetry axis O1 and the mounting surface 411 as a generating line. Thereby, the light traveling in the globe 500 can be prevented from being unduly refracted or reflected by the connection surface 512, and the light from the LED light emitting unit 200 can be prevented from being emitted in an unintended direction. it can.

  An AR coat is applied to the outer peripheral surface of the globe 500. For this reason, it can suppress that the light which advanced in the globe 500 reflects in the outer peripheral surface of the globe 500, and can suppress that the light from the LED light emission part 200 is radiate | emitted in the direction which is not intended.

  The plurality of LED modules 201 constituting the LED light emitting unit 200 are arranged in a matrix on the mounting surface 411. Such a configuration is suitable for illuminating a wider range with the LED lamp 101 while increasing the illuminance.

  The arrangement of the plurality of LED modules 201 is not limited to the configuration shown in FIG. The quantity and arrangement of the LED modules 201 can be variously changed according to, for example, the size and specifications of the LED lamp. In the case shown in FIG. 3, the LED modules 201 are also arranged at the center of the substrate 410 (on the rotational symmetry axis O1). However, for example, as shown in FIG. It may be arranged at a position. Further, only one LED module 201 may be mounted.

  8 to 23 show another embodiment of the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment.

  FIG. 8 shows an LED lamp according to a second embodiment of the present invention. The LED lamp 102 of the present embodiment is different from the above-described embodiments in the configuration of the LED light emitting unit 200, the base 300, and the globe 500.

  As shown in FIGS. 9 and 10, in this embodiment, the LED light emitting unit 200 has a rectangular thin plate shape as a whole. As shown in FIG. 9, the LED light emitting unit 200 includes an LED substrate 210, a plurality of LED chips 220, a sealing resin 230, and a dam portion 240. The LED substrate 210 has a rectangular shape and is made of ceramics such as alumina. A plurality of LED chips 220 are mounted on the LED substrate 210 and a wiring pattern (not shown) serving as a path for supplying power to these LED chips 220 is formed.

  The LED chip 220 can emit blue light, for example. The LED chip 220 is a so-called two-wire type that is connected to the above-described wiring pattern of the LED substrate 210 via two wires. However, the LED chip 220 is not limited to this, and is a one-wire type or a flip-chip type. It may be. The plurality of LED chips 220 are arranged in a matrix on the LED substrate 210.

  The sealing resin 230 seals the plurality of LED chips 220 and is made of a resin material such as a silicone resin or an epoxy resin that transmits light from the LED chips 220. The sealing resin 230 is formed to include a fluorescent material that emits yellow light when excited by light from the LED chip 220, for example. The dam portion 240 is formed in a rectangular frame shape on the LED substrate 210 and is made of, for example, a white silicone resin. In the formation of the sealing resin 230, the dam portion 240 prevents the liquid resin material from flowing out to an unintended region by blocking the liquid resin material.

  As shown in FIG. 8, the base 300 includes a main body 310 and a spacer 320, but these shapes are different from those in the above embodiment. The spacer 320 has a disc shape but does not have the opening 321 shown in the above embodiment. The LED light emitting unit 200 described above is mounted at the center of the upper surface of the spacer 320 in the drawing, and in this embodiment, the upper surface of the spacer 320 is the mounting surface of the LED light emitting unit 200. The spacer 320 is formed with a wiring through hole 322 through which the wiring 430 of the power supply unit 400 passes. The wiring 430 is for guiding the DC power from the plurality of electronic components 420 to the LED light emitting unit 200. The wiring 430 reaches the LED light emitting unit 200 from the substrate 410 through the wiring through hole 322 of the spacer 320.

  The globe 500 has a plurality of chevron portions 510 on the outer peripheral surface thereof, and the form of each chevron portion 510 having the optical path changing surface 511 and the connection surface 512 is substantially the same as that of the above embodiment, but the constricted portion 502. Instead of the above, the present embodiment is different from the above embodiment in that it has a cylindrical portion 505 connected to the lower side of the dome shape portion 501.

  In the LED lamp 102 of the present embodiment, when the light emitted from the LED light emitting unit 200 reaches the optical path changing surface 511, the light emitted from the optical path changing surface 511 is opposite to the x direction on the optical path changing surface 511. Refracts to the side. For this reason, light is emitted from the globe 500 toward a wider area than the light emitted from the LED light emitting unit 200 (LED chip 220). In addition, a plurality of mountain-shaped portions 510 are provided in the x direction on the outer circumferential surface of the globe 500, and the optical path changing surface 511 is provided in a predetermined inclined posture near the x direction in the mountain shaped portion 510. Even with the configuration of the present embodiment, the LED lamp 102 can illuminate a wider range while reducing the size of the globe 500.

  The LED substrate 210 made of ceramics is suitable for transferring heat from the plurality of LED chips 220 to the base 300.

  FIG. 11 shows an LED lamp according to a third embodiment of the present invention. The LED lamp 103 of the present embodiment is different from the above-described embodiments in the configuration of the LED light emitting unit 200, the base 300, and the globe 500, and further includes a base 700 and a flexible wiring board 800.

  The LED light emitting unit 200 includes a plurality of LED modules 201 similar to those in the first embodiment, but is supported by the pedestal 700 via the flexible wiring board 800, and is different from the first embodiment in this respect.

  The flexible wiring board 800 is for supporting a plurality of LED modules 201 and providing a power supply path to them. In this embodiment, the flexible wiring board 800 includes a resin layer and a metal layer constituting a wiring pattern (not shown), and has a circular portion 801, an arc portion 802, and a connecting portion 803 as shown in FIG. doing. The circular portion 801 has a substantially perfect circle shape. The arc portion 802 is curved in an arc shape in the longitudinal direction and has a substantially constant width dimension. The connecting part 803 connects the circular part 801 and the arc part 802.

  As shown in FIGS. 11 and 12, the plurality of LED modules 201 are mounted on a circular portion 801 and an arc portion 802 of the flexible wiring board 800. Among the plurality of LED modules 201, those mounted on the circular portion 801 are arranged in a circle along the outer edge of the circular portion 801, and are arranged near the center of the circular portion 801 surrounded by them. Including things. Among the plurality of LED modules 201, those mounted on the arc portion 802 are arranged in two rows in the longitudinal direction of the arc portion 802.

  The pedestal 700 supports the flexible wiring board 800 and transmits heat from the flexible wiring board 800 to the base 300. The pedestal 700 bulges in the X direction as a whole, and corresponds to an example of the bulging portion referred to in the present invention. The pedestal 700 has a top plate 701, a cylindrical portion 702, and a gutter plate 703. The material of the base 700 is preferably a material having high thermal conductivity, and for example, a metal such as aluminum is used.

  The top plate 701 has a circular shape, and the circular portion 801 of the flexible wiring board 800 is attached by, for example, an adhesive or a double-sided adhesive tape. The cylindrical portion 702 is connected to the top plate 701 and has a tapered cylindrical shape whose diameter decreases as the top plate 701 is approached. The circular arc portion 802 of the flexible wiring board 800 is attached to the cylindrical portion 702. A through-hole for wiring 721 is formed in the cylindrical portion 702. The saddle plate 703 extends outward from the cylindrical portion 702 and has an annular shape.

  As shown in FIG. 12, four heat radiating through holes 722 are formed in the cylindrical portion 702. The outer space and the inner space of the base 700 are connected through the heat dissipation through hole 722. The bolt plate 703 has four bolt through holes 731 and four counterbore holes 732. The bolt through-hole 731 is for passing a bolt 741 that fixes the base 700 to the base 300. In the present embodiment, the four bolt through holes 731 are arranged at a pitch of 90 °. The counterbore hole 732 is for sinking the head of the bolt 741 into the flange plate 703, and is a circular recess having a diameter larger than the diameter of the bolt through hole 731. In the present embodiment, not only the flange plate 703 but also a part of the cylindrical portion 702 is cut when performing drilling for forming the counterbore hole 732. Thus, four notches 723 are formed in the base 700. A portion where the notch 723 penetrates in the thickness direction of the cylindrical portion 702 is the above-described heat dissipation through hole 722. As a result of such a forming method, a counterbore hole 732 is formed by a part of the notch 723. The counterbore hole 732 is filled with a fixing resin 742. The fixing resin 742 is for preventing the bolt 741 from loosening. In the present embodiment, the fixing resin 742 is filled in approximately half of the counterbore hole 732 opposite to the cylindrical portion 702.

  The base 300 includes a main body 310 and a spacer 320. In this embodiment, the opening 321 of the spacer 320 is provided in order to avoid interference with the power supply unit 400. The substrate 410 of the power supply unit 400 is sandwiched between the spacer 320 and the flange plate 703 of the pedestal 700.

  The substrate 410 has four heat radiating through holes 413 formed therein. Each heat radiating through hole 413 is formed in a region near the periphery of the substrate 410. The four heat dissipation through holes 413 are arranged at a pitch of 90 °, and in the circumferential direction of the substrate 410 (corresponding to the circumferential direction of the circular portion 801 of the flexible wiring substrate 800), The heat radiation through hole 413 of the substrate 410 is provided at the same position.

  The wiring 430 of the power supply unit 400 is for guiding DC power from the plurality of electronic components 420 to the flexible wiring board 800. The wiring 430 reaches the flexible wiring substrate 800 from the substrate 410 through the wiring through hole 721 of the base 700.

  The globe 500 includes a dome-shaped portion 501 and a cylindrical portion 505 connected to the lower side of the dome-shaped portion 501 and has the same configuration as that of the second embodiment. A plurality of chevron portions 510 are provided on the outer peripheral surface of the globe 500, and the form of each chevron portion 510 having the optical path changing surface 511 and the connection surface 512 is the same as in the second embodiment.

  In the LED lamp 103 of the present embodiment, when the light emitted from the LED light emitting unit 200 reaches the optical path changing surface 511, the light emitted from the optical path changing surface 511 is opposite to the x direction on the optical path changing surface 511. Refracts to the side. For this reason, the light is emitted from the globe 500 toward a region wider than the light emitted from the LED light emitting unit 200. In addition, a plurality of mountain-shaped portions 510 are provided in the x direction on the outer circumferential surface of the globe 500, and the optical path changing surface 511 is provided in a predetermined inclined posture near the x direction in the mountain shaped portion 510. Also with the configuration of the present embodiment, the LED lamp 103 can illuminate a wider range while reducing the size of the globe 500.

  13 and 14 show an LED lamp according to a fourth embodiment of the present invention. The LED lamp 104 of the present embodiment is configured to be used by being attached to a general-use fluorescent lamp illuminator as an alternative to a straight tube fluorescent lamp, and is greatly different from the above-described embodiment in this respect.

  In the LED lamp 104 of the present embodiment, a cover 500 ′ is provided in place of the globe 500 of the pattern embodiment. As shown in FIG. 13, the cover 500 ′ extends so that the y direction (second direction) is the longitudinal direction. A plurality of chevron portions 510 are provided on the outer peripheral surface of the cover 500 ′. Each of the plurality of chevron portions 510 extends in the y direction and is aligned in the x direction (first direction) perpendicular to the y direction. Each chevron 510 has an optical path changing surface 511 positioned closer to the x direction and a connecting surface 512 positioned on the opposite side of the optical path changing surface 511.

  As understood with reference to FIGS. 4 and 14, each optical path changing surface 511 extends to the optical path changing surface 511 in the vertical plane in the y direction from the intersection 412 between the axis O2 along the x direction and the mounting surface 411. It is inclined with respect to a plane P1 (first surface) perpendicular to the straight line. Each of the optical path changing surfaces 511 is inclined closer to the surface P2 (second surface) passing through the top portion 506 of the cover 500 'and perpendicular to the axis O2 than the surface P1. In this embodiment, as can be understood from FIG. 14, each connection surface 512 includes a straight line extending in the vertical plane in the y direction from the intersection 412.

  In the present embodiment, an AR coat is applied to the outer peripheral surface of the cover 500 '. An optical path changing surface 520 is provided on the inner peripheral surface of the cover 500 ′. The optical path changing surface 520 corresponds to an example of the additional optical path changing surface referred to in the present invention, and is formed in an elliptical arc shape having an axis O2 as a major axis in a vertical plane in the y direction.

  In the present embodiment, the LED light emitting unit 200 includes a plurality of LED modules 201 similar to those in the first embodiment. The plurality of LED modules 201 are mounted on the mounting surface 411 of the substrate 410 extending in the y direction as a longitudinal direction, and are arranged in, for example, three rows in the longitudinal direction of the substrate 410.

  The substrate 410 is attached to the base 300. The base 300 has a long rectangular plate shape extending in the y direction as a longitudinal direction. A plurality of fins 331 are formed in the lower part of the base 300.

  A power supply unit (not shown) is provided at the longitudinal end of the substrate 410. This power supply unit includes, for example, a plurality of electronic components, and functions to convert commercial AC power into DC power suitable for lighting the LED light emitting unit 200. The power supply unit and the LED light emitting unit 200 are connected by wiring (not shown).

  A pair of bases (not shown) are provided at both ends in the longitudinal direction of the base 300 or the cover 500 '. The pair of caps is for supplying electric power from a commercial AC power source by being attached to a socket of a fluorescent lamp lighting fixture.

  In the LED lamp 104 of the present embodiment, when the light emitted from the LED light emitting unit 200 reaches the optical path changing surface 511, the light emitted from the optical path changing surface 511 is opposite to the x direction on the optical path changing surface 511. Refracts to the side. For this reason, light is emitted from the cover 500 ′ toward a wider area than the light emitted from the LED light emitting unit 200 (LED module 201). In addition, a plurality of chevron portions 510 are provided side by side in the x direction on the outer peripheral surface of the cover 500 ′, and the optical path changing surface 511 is provided in a predetermined inclined posture near the x direction in the chevron portion 510. . Also with the configuration of the present embodiment, the LED lamp 104 can illuminate a wider range while reducing the size of the cover 500 ′.

  15 and 16 show an LED lamp according to a fifth embodiment of the present invention. The LED lamp 105 of the present embodiment is mainly different from the above-described fourth embodiment in the configuration of the LED light emitting unit 200.

  In the present embodiment, the LED light emitting unit 200 has a rectangular thin plate shape as a whole, and includes a plurality of the same components as those of the second embodiment described above with reference to FIG. As shown in FIG. 16, the plurality of LED light emitting units 200 are arranged along the longitudinal direction of the base 300. In the present embodiment, the upper surface of the base 300 is the mounting surface of the LED light emitting unit 200. In addition, about the LED light emission part 200, it is not limited to the structure provided with two or more, For example, you may comprise as one LED light emission part 200 provided with the oblong LED board 210 which makes a y direction a longitudinal direction.

  In the present embodiment, the configuration of the cover 500 ′ is the same as that of the fourth embodiment.

  A power supply unit (both not shown) mounted on the substrate is provided at the longitudinal end of the base 300. A pair of bases (not shown) are provided at both ends in the longitudinal direction of the base 300 or the cover 500 '.

  In the LED lamp 105 of this embodiment, when the light emitted from the LED light emitting unit 200 reaches the optical path changing surface 511, the light emitted from the optical path changing surface 511 is opposite to the x direction on the optical path changing surface 511. Refracts to the side. For this reason, light is emitted from the cover 500 ′ toward a wider area than the light emitted from the LED light emitting unit 200. In addition, a plurality of chevron portions 510 are provided side by side in the x direction on the outer peripheral surface of the cover 500 ′, and the optical path changing surface 511 is provided in a predetermined inclined posture near the x direction in the chevron portion 510. . Also with the configuration of the present embodiment, the LED lamp 105 can illuminate a wider range while reducing the size of the cover 500 ′.

  17 and 18 show an LED lamp according to a sixth embodiment of the present invention. The LED lamp 106 of this embodiment further includes a pedestal 700 and a flexible wiring board 800, and is different from the LED lamp 104 of the fourth embodiment mainly in this respect.

  The LED light emitting unit 200 includes a plurality of LED modules 201 similar to those in the first embodiment, but is supported by the pedestal 700 via the flexible wiring board 800, and is different from the fourth embodiment in this respect.

  As shown in FIGS. 17 and 18, the pedestal 700 is for supporting the flexible wiring board 800 and transferring heat from the flexible wiring board 800 to the base 300. The pedestal 700 bulges in the x direction as a whole, and corresponds to an example of the bulging portion referred to in the present invention. The pedestal 700 is trapezoidal in cross section and extends with the y direction as the longitudinal direction. The material of the base 700 is preferably a material having high thermal conductivity, and for example, a metal such as aluminum is used.

  The flexible wiring board 800 is for supporting a plurality of LED modules 201 and providing a power supply path to them. In this embodiment, the flexible wiring board 800 includes a resin layer and a metal layer constituting a wiring pattern (not shown). As shown in FIGS. 17 and 18, the top of the base 700 and a slope connected to the top. It is provided to cover the part

  As shown in FIGS. 17 and 18, the plurality of LED modules 201 are mounted on a flexible wiring board 800. The plurality of LED modules 201 are arranged in two rows in the longitudinal direction at the top of the pedestal 700, and are arranged in one row in the longitudinal direction on the slope portion of the pedestal 700.

  In the present embodiment, the configuration of the cover 500 ′ is the same as that of the fourth embodiment.

  A power supply unit (both not shown) mounted on the substrate is provided at the longitudinal end of the base 300. The power supply unit and the flexible wiring board 800 are connected by wiring (not shown). A pair of bases (not shown) are provided at both ends in the longitudinal direction of the base 300 or the cover 500 '.

  In the LED lamp 106 of the present embodiment, when the light emitted from the LED light emitting unit 200 reaches the optical path changing surface 511, the light emitted from the optical path changing surface 511 is opposite to the x direction on the optical path changing surface 511. Refracts to the side. For this reason, light is emitted from the cover 500 ′ toward a wider area than the light emitted from the LED light emitting unit 200. In addition, a plurality of chevron portions 510 are provided side by side in the x direction on the outer peripheral surface of the cover 500 ′, and the optical path changing surface 511 is provided in a predetermined inclined posture near the x direction in the chevron portion 510. . Also with the configuration of the present embodiment, the LED lamp 106 can illuminate a wider range while reducing the size of the cover 500 ′.

  19 and 20 show an LED lamp according to a seventh embodiment of the present invention. The LED lamp 107 of the present embodiment is configured to be used by being attached to a general fluorescent lamp luminaire as an alternative to a straight tube fluorescent lamp. The LED lamp 107 of the present embodiment is greatly different from the above embodiment in the configuration of the LED light emitting unit 200 and the cover 500 ′.

  In the LED lamp 107, as shown in FIG. 19, the cover 500 'extends so that the y direction (second direction) is the longitudinal direction. In the present embodiment, the outer peripheral surface 530 of the cover 500 ′ has a circular cross section, and a plurality of chevron portions 510 are provided on the inner peripheral surface of the cover 500 ′. Each of the plurality of chevron portions 510 extends in the y direction and is aligned in the x direction (first direction) perpendicular to the y direction. Each chevron 510 has an optical path changing surface 511 positioned closer to the x direction and a connecting surface 512 positioned on the opposite side of the optical path changing surface 511. The optical path changing surface 511 refracts the light from the LED light emitting unit 200 and plays the same role as the optical path changing surface 511 in the above embodiment, but is provided on the inner peripheral surface of the cover 500 ′. However, it is greatly different from the above embodiment.

  As shown in FIGS. 19 and 20, a pair of protruding pieces 540 are provided inside the cover 500 ′. These protruding pieces 540 are in contact with the upper side (mounting surface 411) of the substrate 410, and prevent the substrate 410 and the base 300, which will be described later, from being displaced in the cover 500 '. The two protruding pieces 540 are located on the lower side in the figure (on the opposite side in the x direction) with respect to the center O3 of the circular outer peripheral surface of the cover 500 '. Accordingly, as shown in FIG. 20, the center O3 is located closer to the x direction than the mounting surface 411 of the substrate 410.

  A method for determining the shape of the inner peripheral surface of the cover 500 ′ of this embodiment will be described with reference to FIG. 21. FIG. 21 is a simplified representation of a cross section perpendicular to the y direction. The optical path changing surface 511 is intended to refract the light from the LED light emitting unit 200 toward the side opposite to the x direction. For this reason, the light from the LED light emitting unit 200 is refracted as indicated by an arrow on the optical path changing surface 511. Thus, as can be understood from FIG. 21, the projection point 414 obtained by projecting the top portion 506 of the cover 500 ′ onto the mounting surface 411 of the substrate 410 and any point on the optical path changing surface 511 are included, and the y direction (FIG. The angle γ (first angle) formed by the surface P3 (third surface) extending along the direction perpendicular to the paper surface in FIG. 21 and the optical path changing surface 511 on the opposite side in the x direction is less than 90 degrees.

  In the present embodiment, in the vertical plane in the y direction, the light emitted from the LED light emitting unit 200 is such that the light emitted from the outer peripheral surface 530 of the cover 500 ′ is in the same direction as the straight line extending from the center O3 of the circular outer peripheral surface. Is refracted by the optical path changing surface 511. As understood from FIG. 21, the light emitted from the cover 500 ′ is orthogonal to the outer peripheral surface 530 of the cover 500 ′, and the light traveling inside the cover 500 ′ travels straight on the outer peripheral surface of the cover 500 ′. To do. As understood from this, when the refracted light refracted by the light path changing surface 511 from the LED light emitting unit 200 is extended inside the cover 500 ′, the extension line L1 passes through the center O3. Configured as follows.

  From such a relationship, when the position in the circumferential direction of the cover 500 ′ is determined for each optical path changing surface 511, as shown in FIG. 22, the incident light from the LED light emitting unit 200 (projection point 414) to the optical path changing surface 511 An angle α formed by R1 and light emitted from the cover 500 ′ (refracted light R2 at the optical path changing surface 511) is determined. Here, when the incident angle of the incident light R1 on the optical path changing surface 511 is θ1, the refractive angle of the refracted light R2 is θ2, and the refractive index of the cover 500 ′ is n, the following expressions (1) and (2) are established. .

  Here, when formula (2) is summarized, the following formulas (3) and (4) can be derived.

  Next, from the equations (1) and (4), the following equations (5) to (9) can be derived by summing up θ2.

On the other hand, the angle γ formed by the surface P3 and the optical path changing surface 511 can be expressed by the following equation (10) using α and θ2.

  Therefore, the following equation (11) can be derived from the equations (9) and (10).

  As understood from this, when the position of the optical path changing surface 511 is determined, the angle γ can be calculated, and the inclination of the optical path changing surface 511 can be determined. In the present embodiment, the optical path changing surface 511 is set for each 5 ° in the circumferential direction of the cover 500 ′, for example.

  In this embodiment, as understood from FIG. 21, the angle γ is set to be smaller as the angled portion 510 is located in the direction opposite to the x direction.

  As shown in FIGS. 19 and 20, the connection surface 512 connects between adjacent optical path changing surfaces 511. In this embodiment, as can be understood from FIG. 21, each connection surface 512 includes a straight line extending from the projection point 414 in a vertical plane in the y direction.

  As shown in FIGS. 20 and 21, in the present embodiment, the plurality of chevron portions 510 all extend from the portion corresponding to the top portion 506 of the cover 500 ′ to the portion corresponding to the mounting surface 411 rather than the center O3. It is provided in the area.

  As shown in FIG. 23, the LED light emitting unit 200 includes a plurality of LED chips 250, and these LED chips 250 are configured to be mounted on the mounting surface 411 of the substrate 410. The plurality of LED chips 250 are arranged in a line along the y direction.

  Each LED chip 250 includes a submount substrate 251 and a semiconductor layer 252. The submount substrate 251 is made of Si, for example. The semiconductor layer 252 includes an n-type semiconductor layer made of, for example, GaN, an active layer, and a p-type semiconductor layer, and emits blue light, for example. An electrode pad formed on the submount substrate 251 side is formed on the semiconductor layer 252. These electrode pads are bonded to a wiring pattern (not shown) formed on the submount substrate 251. Two electrodes (not shown) are formed on the submount substrate 251 and connected to a wiring pattern (not shown) formed on the substrate 410 by, for example, a wire 260 made of Au. The LED chip 250 and the substrate 410 are bonded together by, for example, an insulating paste 270.

  The LED chip 250 is covered with a sealing resin 280. The sealing resin 280 is a light having a wavelength different from that of the light from the LED chip 250 when excited by the light from the LED chip 250 and a material that transmits light from the LED chip 250 such as a transparent epoxy resin. And a fluorescent material that emits light. Examples of the fluorescent material include materials that emit yellow light when excited by blue light. The sealing resin 280 covers the wire 260 and has a shape blocked by a weir portion (not shown) made of glass formed on the substrate 410, for example. This is because when the sealing resin 280 is formed by dropping a liquid epoxy resin material containing a fluorescent material toward the LED chip 250, the epoxy resin material is blocked by the dam portion. By providing the sealing resin 280, the LED light emitting unit 200 emits white light in which blue light and yellow light are mixed.

  The substrate 410 is attached to the base 300. The base 300 has a long rectangular plate shape extending in the y direction as a longitudinal direction. A plurality of convex portions 340 are formed in the lower portion of the base 300. Each convex portion 340 extends with the y direction as a longitudinal direction.

  A power supply unit (not shown) is provided at the longitudinal end of the substrate 410. This power supply unit includes, for example, a plurality of electronic components, and functions to convert commercial AC power into DC power suitable for lighting the LED light emitting unit 200. The power supply unit and the LED light emitting unit 200 are connected by wiring (not shown).

  A pair of bases (not shown) are provided at both ends in the longitudinal direction of the base 300 or the cover 500 '. The pair of caps is for supplying electric power from a commercial AC power source by being attached to a socket of a fluorescent lamp lighting fixture.

  In the LED lamp 107 of this embodiment, when the light emitted from the LED light emitting unit 200 reaches the optical path changing surface 511, the light emitted from the optical path changing surface 511 is opposite to the x direction on the optical path changing surface 511. Refracts to the side. For this reason, light is emitted from the cover 500 ′ toward a wider area than the light emitted from the LED light emitting unit 200 (LED chip 250). In addition, a plurality of chevron portions 510 are provided side by side in the x direction on the inner peripheral surface of the cover 500 ′, and the optical path changing surface 511 is provided in a predetermined inclined posture near the x direction in the chevron portion 510. Yes. Also with the configuration of the present embodiment, the LED lamp 107 can illuminate a wider range while reducing the size of the cover 500 ′.

  As described above with reference to FIG. 21, the angle γ between the surface P3 and the optical path changing surface 511 on the opposite side of the x direction is made smaller as the optical path changing surface 511 is located in the direction opposite to the x direction. ing. For this reason, the degree to which the light from the LED light emitting unit 200 is refracted on the optical path changing surface 511 increases as the optical path changing surface 511 is located in the direction opposite to the x direction. 20 and 21, the light emitted from the outer peripheral surface of the cover 500 ′ extends radially from the center O3 of the cover 500 ′ on a surface perpendicular to the y direction. Proceed to. According to such a configuration, the light emitted from the LED light emitting unit 200 toward the x direction can be emitted toward the side opposite to the X direction. Therefore, the LED lamp 107 is suitable for illuminating a wider range.

  Further, in the LED lamp 107, the plurality of chevron portions 510 are provided in all regions from a portion corresponding to the top portion 506 of the cover 500 'to a portion corresponding to the mounting surface 411 closer to the center O3. As described above, according to the configuration in which the mountain-shaped portion 510 is provided closer to the mounting surface 411 than the center O3, the optical path changing surface 511 of the mountain-shaped portion 510 is opposite to the X direction (oblique in FIGS. 20 and 21). More light is more likely to be directed toward the bottom. Therefore, the LED lamp 107 is suitable for illuminating a wider range.

  The LED lamp according to the present invention is not limited to the embodiment described above. The specific configuration of each part of the LED lamp according to the present invention can be varied in design in various ways.

101, 102, 103, 104, 105, 106, 107 LED lamp O1 axis of rotational symmetry O2 axis P1 plane (first plane)
P2 surface (2nd surface)
P3 surface (third surface)
x direction (first direction)
y direction (second direction)
200 LED light emitting part 201 LED module 202 LED chip 203 lead 204 mounting terminal 205 case 206 sealing resin 207 wire 210 LED substrate 220 LED chip 230 sealing resin 240 weir part 250 LED chip 251 submount substrate 252 semiconductor layer 260 wire 270 insulation Conductive paste 280 sealing resin 300 base 310 main body 311 fin 312 power receiving recess 320 spacer 321 opening 322 wiring through hole 331 fin 340 convex 400 power supply 410 substrate 411 mounting surface 412 intersection 413 heat dissipation through hole 414 projection point 420 Electronic component 430 Wiring 500 Globe 500 ′ Cover 501 Dome-shaped portion 502 Constriction portion 503 Insertion portion 504 (Glove) apex 505 Cylindrical portion 506 (Glove) apex 510 Angle portion 5 1 light path changing surface 512 connecting surface 520 (additional) light path changing surface 530 the outer peripheral surface 540 protruding piece 600 ferrule 700 pedestal (bulge portion)
701 Top plate 702 Cylindrical portion 703 Cover plate 721 Wiring through hole 722 Radiation through hole 723 Notch 731 Bolt through hole 732 Counterbore hole 741 Bolt 742 Fixed resin 800 Flexible wiring board 801 Circular portion 802 Arc portion 803 Connection portion

Claims (29)

An LED light emitting unit having one or more LED chips;
A support portion having a mounting surface on which the LED light emitting portion is mounted;
A glove that covers the LED light emitting part and transmits light from the LED light emitting part,
The globe is an LED lamp having a rotationally symmetric shape having a rotationally symmetric axis as an axis along a first direction extending from the support portion to the apex of the globe. ,
The outer circumferential surface of the globe is provided with a plurality of chevron portions each having a ring shape centered on the rotational symmetry axis and arranged in the first direction,
Each of the chevron portions has an optical path changing surface that is located closer to the first direction and that refracts light from the LED light emitting portion, and a connection surface that is located on the opposite side of the optical path changing surface. A featured LED lamp. Each of the optical path changing surfaces is inclined with respect to a first surface perpendicular to a straight line extending from the intersection of the rotational symmetry axis and the mounting surface to the optical path changing surface,
2. The LED lamp according to claim 1, wherein each of the optical path changing surfaces is inclined closer to a second surface that passes through the top of the globe and is perpendicular to the rotational symmetry axis than the first surface.   3. The LED lamp according to claim 1, wherein each connection surface has a shape substantially along a side surface of a cone having a straight line extending from an intersection of the rotational symmetry axis and the mounting surface as a generating line.   The globe includes a dome-shaped portion having the apex at the top, and a constricted portion connected to the support portion side with respect to the dome-shaped portion and narrowing toward the support portion. The LED lamp in any one.   The LED lamp according to claim 1, wherein the optical path changing surface is provided with an AR coating.   The inner circumferential surface of the globe is provided with an additional optical path changing surface that is formed by rotation of an elliptical arc with the rotational symmetry axis as a major axis and refracts light from the LED light emitting unit. The LED lamp according to any one of 5.   The LED lamp according to any one of claims 1 to 6, wherein each of the LED light emitting units includes the LED chip and includes one or more LED modules mounted on the mounting surface.   The LED lamp according to claim 7, wherein a plurality of the LED modules are arranged in a matrix on the mounting surface.   The said LED light emission part is an LED lamp in any one of Claim 1 thru | or 6 which has a LED board attached to the said support part and in which several LED chip was mounted. The support portion includes a bulging portion that bulges in the first direction,
The LED lamp according to claim 1, wherein the LED light emitting part is supported by the bulging part. The bulging portion has a circular top plate located near the top of the globe and a cylindrical portion connected to the top plate,
The LED lamp according to claim 10, wherein the LED light emitting part is supported by the top plate and the cylindrical part.   The LED lamp according to claim 11, wherein the cylindrical portion has a diameter that decreases toward the top plate. The LED light emitting unit includes a plurality of LED modules each including the LED chip,
The LED lamp according to claim 11 or 12, wherein the plurality of LED modules are mounted on a flexible wiring board attached to the bulging portion. An LED light emitting unit having one or more LED chips;
A support portion having a mounting surface on which the LED light emitting portion is mounted;
A cover that covers the LED light emitting unit and transmits light from the LED light emitting unit,
The cover is an LED lamp that bulges to the front side of the mounting surface and extends in a second direction perpendicular to a first direction extending from the support portion to the top of the cover,
The outer peripheral surface of the cover is provided with a plurality of chevron portions each extending in the second direction and arranged in the first direction,
Each of the chevron portions has an optical path changing surface that is located closer to the first direction and that refracts light from the LED light emitting portion, and a connection surface that is located on the opposite side of the optical path changing surface. A featured LED lamp. Each of the optical path changing surfaces is inclined with respect to a first surface perpendicular to a straight line extending to the optical path changing surface in a vertical plane in the second direction from an intersection of the axis along the first direction and the mounting surface. And
15. The LED lamp according to claim 14, wherein each of the optical path changing surfaces is inclined closer to a second surface that passes through the top of the cover and is perpendicular to the axis than the first surface.   16. The LED lamp according to claim 14, wherein each connection surface includes a straight line extending in a vertical plane in the second direction from an intersection between the axis and the mounting surface.   The LED lamp according to claim 14, wherein an AR coating is applied to the optical path changing surface.   On the inner peripheral surface of the cover, an additional optical path changing surface that refracts light from the LED light-emitting portion is provided in an elliptical arc shape having the axis as a major axis in the vertical plane in the second direction. The LED lamp according to claim 15.   The LED lamp according to any one of claims 14 to 18, wherein each of the LED light emitting units includes the LED chip and includes one or more LED modules mounted on the mounting surface.   The LED lamp according to claim 14, wherein the LED light emitting unit includes an LED substrate attached to the support unit and having a plurality of LED chips mounted thereon. The support portion includes a bulging portion that bulges in the first direction,
The LED lamp according to claim 14, wherein the LED light emitting part is supported by the bulging part. An LED light emitting unit having one or more LED chips;
A support portion having a mounting surface on which the LED light emitting portion is mounted;
A cover that covers the LED light emitting unit and transmits light from the LED light emitting unit,
The cover is an LED lamp that bulges to the front side of the mounting surface and extends in a second direction perpendicular to a first direction extending from the support portion to the top of the cover,
The inner peripheral surface of the cover is provided with a plurality of chevron portions each extending in the second direction and arranged in the first direction,
Each of the chevron portions has an optical path changing surface that is located closer to the first direction and that refracts light from the LED light emitting portion, and a connection surface that is located on the opposite side of the optical path changing surface. A featured LED lamp.   Each of the optical path changing surfaces includes a projection point obtained by projecting the top portion onto the mounting surface, and any point on the optical path changing surface, and a third surface extending along the second direction, and the first direction. The LED lamp according to claim 22, wherein the first angle formed with the optical path changing surface on the opposite side of the LED is less than 90 degrees.   The LED lamp according to claim 23, wherein the first angle is set to be smaller as it is located in a direction opposite to the first direction with respect to the optical path changing surface.   25. The LED lamp according to claim 22, wherein each of the connection surfaces includes a straight line extending from the projection point in a vertical plane in the second direction.   26. The outer peripheral surface of the cover has a circular shape centered on a point located closer to the first direction than the mounting surface in a vertical plane in the second direction. LED lamp described in 1.   27. The LED lamp according to claim 26, wherein the plurality of mountain-shaped portions are provided in all regions extending from a portion corresponding to the top portion to a portion corresponding to the mounting surface closer to the mounting surface than the center.   Each of the optical path changing surfaces has an extension line extending when the refracted light that is refracted by the light emitting unit from the LED light emitting portion is refracted by the optical path changing surface within the vertical direction in the second direction. 28. An LED lamp according to claim 26 or 27, configured to pass through the center. The LED light emitting unit includes a plurality of the LED chips,
29. The LED lamp according to claim 22, wherein a plurality of the LED chips are arranged in a line along the second direction on the mounting surface.

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