Lighting devices and lighting fixtures

Abstract

To provide a lighting device and the like capable of changing light distribution of illumination light without exchanging the lighting device to another one.SOLUTION: An LED lamp 1 as one example of a lighting device includes: a first light-emitting part 10 emitting first light in a light focus mode; a second light-emitting part 20 emitting second light in a light diffusion mode; a base 30 having an arrangement surface including a first area 31a where the first light-emitting part 10 is arranged and a second area 31b where the second light-emitting part 20 is arranged; and an optical member 40 having a first translucent part 41 which covers the first light-emitting part 10 and the second light-emitting part 20 and through which the first light emitted by the first light-emitting part 10 transmits, and a second translucent part 42 through which the second light emitted by the second light-emitting part 20 transmits. The optical member 40 is composed of the first translucent part 41 and the second translucent part 42 so that the lights emitted from the first translucent part 41 and the second translucent part 42 are different in their optical characteristics from each other. The second light-emitting part 20 is located outside the first light-emitting part 10.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a lighting device and a lighting fixture, and particularly relates to a lighting device that is an example of an LED lamp using a light emitting diode (LED) and a lighting fixture provided with the lighting device. [Background Art]

[0002] Solid-state light emitting elements such as LEDs are used as light sources for various products because they are compact, have high efficiency and long service life. For example, LED lighting using LEDs has been put into practical use.

[0003] As LED lighting, LED lamps with caps are known, such as bulb-type LED lamps (LED bulbs) replacing conventionally known bulb-type fluorescent lamps and incandescent bulbs, or straight-tube LED lamps replacing straight-tube fluorescent lamps. In addition, lighting fixtures such as ceiling lights, downlights, and spotlights are also known as LED lighting.

[0004] An LED lamp with a cap is detachably attached to a socket of a fixture installed on a ceiling or the like. A flat lighting device is known as this type of LED lamp (e.g., Patent Document 1).

[0005] The flat lighting device has a cap such as a GX53 type cap, and comprises an LED module serving as a light emitting part including a plurality of LEDs (light sources), a power supply part for lighting the LED module, a flat housing accommodating the power supply part, a light-transmissive cover that is an optical member covering the LED module, and a pair of pins electrically connected to the power supply part. [Prior Art Documents] [Patent Documents]

[0006] [Patent Document 1] International Publication No. 2012 / 005239 [Summary of the Invention] [Problems that the invention aims to solve]

[0007] When attempting to change the light distribution of a lighting fixture to alter the atmosphere of a lighting space (such as a room), it is necessary to either replace the lighting device (LED lamp) attached to the fixture with a different type, or to replace the entire lighting fixture. In other words, in either case, the replacement of the lighting device (LED lamp) is required.

[0008] This invention was made to solve these problems and aims to provide a lighting device and lighting fixture that can change the light distribution of the lighting without replacing the lighting device. [Means for solving the problem]

[0009] To achieve the above objective, one embodiment of the lighting device according to the present invention comprises a first light-emitting unit that emits first light in a focusing mode, a second light-emitting unit that emits second light in a diffusion mode, a base having an arrangement surface including a first region on which the first light-emitting unit is arranged and a second region on which the second light-emitting unit is arranged, and an optical member that covers the first light-emitting unit and the second light-emitting unit and has a first light-transmitting portion through which the first light is transmitted and a second light-transmitting portion through which the second light is transmitted, wherein the optical member is configured such that the optical properties of the light emitted from the first light-transmitting portion and the second light-transmitting portion are different, and the second light-emitting unit is located outside the first light-emitting unit.

[0010] Furthermore, one embodiment of the lighting fixture according to the present invention comprises the above-mentioned lighting device and a fixture to which the lighting device is detachably attached. [Effects of the Invention]

[0011] According to the present invention, the light distribution of the illumination can be changed without replacing the lighting device. [Brief explanation of the drawing]

[0012] [Figure 1]This is a perspective view of the LED lamp according to the embodiment, viewed from diagonally above. [Figure 2] This is a perspective view of the LED lamp according to the embodiment, viewed from diagonally below. [Figure 3] This is an exploded perspective view of an LED lamp according to an embodiment. [Figure 4] This is a top view of an LED lamp according to an embodiment. [Figure 5] Figure 4 is a cross-sectional view of an LED lamp according to an embodiment in the VV line. [Figure 6] This is a cross-sectional view of an LED lamp according to an embodiment along the line VI-VI in Figure 4. [Figure 7] This is a perspective view of the optical element in the LED lamp according to the embodiment, as seen from the inner side. [Figure 8] This is a perspective view of the optical element in the LED lamp according to the embodiment, as seen from the outer side. [Figure 9] This is a perspective view showing a magnified portion of the insulating cover in an LED lamp according to an embodiment. [Figure 10] This is a perspective view showing the cylindrical section and the surrounding area of ​​the cylindrical section when no power wires are inserted through the insertion holes. [Figure 11] This is a perspective view showing the cylindrical section and the surrounding area of ​​the cylindrical section with a power wire inserted through the insertion hole. [Figure 12] This figure shows the LED lamp according to the embodiment when it is emitting illumination light in focusing mode. [Figure 13] This figure shows the LED lamp according to the embodiment when it is emitting illumination light in diffuse mode. [Modes for carrying out the invention]

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. All of the embodiments described below show a specific example of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of the constituent elements, etc. shown in the following embodiments are merely examples, and are not intended to limit the present invention. Accordingly, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims representing the most superordinate concept of the present disclosure are described as optional constituent elements.

[0014] Each drawing is a schematic diagram, and is not necessarily strictly illustrated. Further, in each drawing, substantially identical configurations are denoted by the same reference numerals, and overlapping descriptions are omitted or simplified. In addition, in the present specification, the terms "upper" and "upper" do not necessarily refer to the upward direction (vertically upward) and the downward direction (vertically downward) in absolute spatial perception, respectively.

[0015] (Embodiment) First, the overall configuration of the LED lamp 1 according to the embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a perspective view of the LED lamp 1 according to the embodiment when viewed from diagonally above, and Fig. 2 is a perspective view of the same LED lamp 1 when viewed from diagonally below.

[0016] The LED lamp 1 is an example of a lighting device and emits light. As shown in Fig. 1 and Fig. 2, the LED lamp 1 is a thin flat lamp. Specifically, the LED lamp 1 is an illumination light source having an overall flat shape and a cylindrical flat shape (disk shape). As an example, the external size of the LED lamp 1 is φ70 mm, but is not limited thereto.

[0017] Furthermore, the LED lamp 1 is a replaceable lamp that is attached to a socket and is detachably mounted to the socket. When the LED lamp 1 is attached to the socket, it lights up with power supplied through the socket. The socket is attached to a fixture or bracket installed on building materials such as ceilings, walls, and floors, or it is installed directly on the building materials. When the LED lamp 1 is attached to the socket, a lighting fixture such as a downlight, spotlight, or ceiling light is formed. Such a lighting fixture comprises, for example, the LED lamp 1 and a fixture to which the LED lamp 1 is detachably mounted.

[0018] In this embodiment, the LED lamp 1 has a base that can be attached to a socket. Specifically, the LED lamp 1 has a GX53 base that can be detachably attached to a GX53 socket. However, the base of the LED lamp 1 is not limited to a GX53 base and may have other bases such as a GH76p base. Furthermore, the LED lamp 1 may be a lighting device that does not have a base.

[0019] Next, the detailed configuration of the LED lamp 1 according to this embodiment will be described using Figures 3 to 6. Figure 3 is an exploded perspective view of the LED lamp 1 according to this embodiment. Figure 4 is a top view of the LED lamp 1. In Figure 4, (a) is a top view with the optical member 40 attached, and (b) is a top view with the optical member 40 removed. Figure 5 is a cross-sectional view along line VV in Figure 4, and Figure 6 is a cross-sectional view along line VI-VI in Figure 4. Note that in Figure 6, the pair of power wires 131 and the pair of power wires 132 inserted through the insertion hole 61a are omitted.

[0020] As shown in Figures 3 to 6, the LED lamp 1 comprises a first light-emitting section 10, a second light-emitting section 20, a base 30, an optical element 40, a power supply section 50, an insulating cover 60, a first holder 70, a second holder 80, a heat sink 90, a housing 100, and pins 110.

[0021] In this embodiment, the optical element 40 and the housing 100 are the outer components. Therefore, the optical element 40 and the housing 100 constitute the outer housing, and the various components mentioned above, such as the first light-emitting unit 10 and the second light-emitting unit 20, are housed within this outer housing.

[0022] Each of the first light-emitting unit 10 and the second light-emitting unit 20 is a light source that emits light. Specifically, each of the first light-emitting unit 10 and the second light-emitting unit 20 is a light-emitting module that emits light of a predetermined color, for example, white light as illumination light. In this embodiment, each of the first light-emitting unit 10 and the second light-emitting unit 20 is an LED module having multiple LEDs as multiple light sources. The light emitted from the first light-emitting unit 10 and the second light-emitting unit 20 passes through the optical member 40 and is radiated to the outside of the LED lamp 1.

[0023] The first light-emitting unit 10 is a light-emitting module that emits first light. In this embodiment, the first light-emitting unit 10 emits white light as the first light. In this embodiment, the first light-emitting unit 10 is a COB (Chip On Board) type LED module and has a substrate 11 and an LED light-emitting unit 12 arranged on the substrate 11, as shown in Figures 3 to 6.

[0024] The substrate 11 is a mounting substrate for mounting the LEDs included in the LED light-emitting section 12. The base material used to constitute the substrate 11 may be a ceramic substrate, a resin substrate, or a metal base substrate. In this embodiment, the plan view shape of the substrate 11 is substantially rectangular. Specifically, the plan view shape of the substrate 11 is a square with a part (corner, etc.) cut out. Note that the plan view shape of the substrate 11 is not limited to a square or rectangle; it may also be circular or other shapes.

[0025] The substrate 11 has a pair of terminals 11a (see Figure 4) for receiving DC power from an external source to illuminate the LEDs included in the LED light-emitting section 12, and metal wiring in a predetermined pattern that is connected to the pair of terminals 11a and for electrically connecting the LEDs to each other. A resist made of an insulating resin material may be formed on the surface of the substrate 11 to protect the metal wiring and ensure dielectric strength.

[0026] In this embodiment, the pair of terminals 11a are electrodes formed on the surface of the substrate 11. The pair of terminals 11a are electrically connected to the power supply unit 50 via a pair of power lines 131. Note that the pair of terminals 11a may be connector terminals instead of electrodes.

[0027] The LED light-emitting section 12 includes multiple LED chips, which are multiple LEDs mounted on the substrate 11, and a sealing member that seals the multiple LED chips.

[0028] In the first light-emitting section 10, the LEDs in the LED light-emitting section 12 are bare chips that emit monochromatic visible light. For example, the LEDs are blue LED chips that emit blue light when powered on. Multiple LEDs are arranged in a matrix on the substrate 11, for example. Note that it is sufficient to have at least one LED.

[0029] The sealing member of the LED light-emitting section 12 is made of a translucent insulating resin material such as silicone resin. In this embodiment, the sealing member contains a phosphor as a wavelength conversion material that converts the wavelength of light from the LED (LED chip). The sealing member is, for example, a phosphor-containing resin in which a phosphor is dispersed in silicone resin. In other words, the sealing member is a phosphor-containing resin in which a phosphor is contained in a translucent resin, and it converts the wavelength (color) of light from the LED chip to a predetermined wavelength.

[0030] As the phosphor to be contained in the encapsulating member, if the LED is a blue LED chip that emits blue light, for example, a YAG-based yellow phosphor can be used to obtain white light. In this case, the yellow phosphor absorbs a portion of the blue light emitted by the blue LED chip, is excited, and emits yellow light. This yellow light and the blue light that was not absorbed by the yellow phosphor then mix to form white light, which is emitted from the LED light-emitting part 12. The encapsulating member may also contain dispersed light-diffusing materials such as silica and fillers.

[0031] As shown in Figures 3 and 4, in this embodiment, the sealing member of the LED light-emitting section 12 is formed to have a circular shape in plan view so as to seal all the LEDs together. The outer shape of the sealing member defines the outer shape of the LED light-emitting section 12. In this case, the substrate 11 may be configured to have a ring-shaped protrusion (dam) so that when the liquid sealing member is applied to the substrate 11, the liquid sealing member is blocked by the protrusion.

[0032] Furthermore, the sealing member may encapsulate the LEDs collectively in a shape other than circular (for example, rectangular). Also, the sealing member may not encapsulate all the LEDs at once, but may encapsulate multiple LEDs in rows in a line, or each LED may be encapsulated individually.

[0033] The second light-emitting unit 20 is a light-emitting module that emits a second light. In this embodiment, the second light-emitting unit 20 emits white light as the second light. The color temperature of the white light emitted by the second light-emitting unit 20 as the second light may be the same as or different from the color temperature of the white light emitted by the first light-emitting unit 10 as the first light. For example, the color temperature of the white light emitted by the first light-emitting unit 10 may be higher than the color temperature of the white light emitted by the second light-emitting unit 20, or the color temperature of the white light emitted by the second light-emitting unit 20 may be higher than the color temperature of the white light emitted by the first light-emitting unit 10. In this embodiment, the color temperature of the white light emitted by the first light-emitting unit 10 is higher than the color temperature of the white light emitted by the second light-emitting unit 20. As an example, the color temperature of the white light emitted by the first light-emitting unit 10 is about 5000K, and the color temperature of the white light emitted by the second light-emitting unit 20 is 2700K.

[0034] The second light-emitting unit 20 is an SMD (Surface Mount Device) type LED module, and as shown in Figures 3 to 6, it comprises a substrate 21 and a plurality of LED packages 22 arranged on the substrate 21 as LEDs.

[0035] The substrate 21 is a mounting substrate for mounting the LED package 22. The base material used to constitute the substrate 11 is a ceramic substrate, a resin substrate, or a metal-based substrate. In this embodiment, the plan view shape of the substrate 21 is annular. Specifically, the plan view shape of the substrate 21 is circular. However, the plan view shape of the substrate 21 is not limited to a circular shape; it may also be rectangular or other shapes. Furthermore, the substrate 21 may be divided into multiple sections.

[0036] The substrate 21 has a pair of terminals 21a (see Figures 3 and 4) for receiving DC power from an external source to illuminate the LED package 22, and metal wiring in a predetermined pattern that is connected to the pair of terminals 21a and for electrically connecting the LED packages 22 to each other. A resist made of an insulating resin material may be formed on the surface of the substrate 21 to cover the metal wiring in order to protect it and ensure dielectric strength.

[0037] In this embodiment, the pair of terminals 21a are connector terminals. The pair of terminals 21a are electrically connected to the power supply unit 50 via a pair of power lines 132. For example, each of the pair of terminals 21a and each of the pair of power lines 132 are electrically and mechanically connected by inserting each of the pair of terminals 21a into each of the pair of power lines 132. Note that the pair of terminals 21a may be electrodes formed on the surface of the substrate 11 instead of connector terminals.

[0038] Each of the multiple LED packages 22 is a white LED light source that emits white light. Specifically, each LED package 22 is a surface-mount (SMD) type LED light source in which LEDs are packaged, and comprises a container (package), an LED chip mounted inside the container, and a sealing member that seals the LED chip.

[0039] The LED chip in the LED package 22 is an example of a semiconductor light-emitting element that emits light in response to a predetermined DC power, and is a bare chip that emits monochromatic visible light. The LED chip is, for example, a blue LED chip that emits blue light when power is applied. Note that the LED package 22 may contain more than one LED chip. In this case, the multiple LED chips contained in the LED package 22 can be two LED chips selected from a blue LED chip that emits blue light, a red LED chip that emits red light, and a green LED chip that emits green light. Alternatively, the multiple LED chips contained in the LED package 22 may consist of three LED chips: a blue LED chip, a red LED chip, and a green LED chip, making the LED package 22 an RGB white light source.

[0040] The sealing member of the LED package 22 is made of a translucent insulating resin material such as silicone resin. In this embodiment, the sealing member contains a phosphor as a wavelength conversion material that converts the wavelength of light from the LED chip. In other words, the sealing member is a phosphor-containing resin in which a phosphor is contained in a translucent resin, and it converts the wavelength (color) of the light from the LED chip to a predetermined wavelength. The sealing member is filled into a recess in the container.

[0041] As the phosphor to be contained in the encapsulating member, if the LED is a single blue LED chip that emits blue light, a yellow phosphor of the YAG type can be used to obtain white light. In this case, the yellow phosphor absorbs a portion of the blue light emitted by the blue LED chip, is excited, and emits yellow light. This yellow light and the blue light that was not absorbed by the yellow phosphor then mix to form white light, which is emitted from the LED package 22. The encapsulating member may also contain dispersed light diffusing materials such as silica and fillers. Furthermore, the encapsulating member does not necessarily have to contain phosphor. For example, if the LED package 22 is equipped with three LED chips, a blue LED chip, a red LED chip, and a green LED chip, the encapsulating member does not necessarily have to contain phosphor.

[0042] As shown in Figure 4, the multiple LED packages 22 are arranged in a ring shape on the ring-shaped substrate 21. In this embodiment, the multiple LED packages 22 are arranged in a ring shape in two rows. For example, if the outer dimensions of the LED lamp 1 are φ70 mm, the LED packages 22 located on the outer side of the two rows are arranged along a circle with a diameter of φ51 mm, and the LED packages 22 located on the inner side of the two rows are arranged along a circle with a diameter of φ42.5 mm.

[0043] As shown in Figures 4 to 6, the second light-emitting unit 20 is located outside the first light-emitting unit 10. In other words, the first light-emitting unit 10 is located inside the second light-emitting unit 20. Specifically, the annular substrate 21 of the second light-emitting unit 20 is located outside the roughly rectangular substrate 11 of the first light-emitting unit 10, and in a plan view, the substrate 21 surrounds the entire circumference of the substrate 11. In other words, the roughly rectangular substrate 11 of the first light-emitting unit 10 is surrounded by the substrate 21 of the second light-emitting unit 20.

[0044] As shown in Figures 5 and 6, the first light-emitting unit 10 and the second light-emitting unit 20 are arranged on and supported by the base 30. The base 30 is a support base that supports the first light-emitting unit 10 and the second light-emitting unit 20. In this embodiment, the base 30 is a module plate that supports the first light-emitting unit 10 and the second light-emitting unit 20, which are LED modules.

[0045] The base 30 has a first surface 31 on which the first light-emitting unit 10 and the second light-emitting unit 20 are arranged, and a second surface 32 facing away from the first surface 31. The first surface 31 of the base 30 is the surface on the optical member 40 side, and the second surface 32 of the base 30 is the surface on the power supply unit 50 side. The first surface 31 and the second surface 32 are flat planes, but are not limited to flat planes.

[0046] The first surface 31 is a mounting surface that includes a first region 31a on which the first light-emitting unit 10 is arranged and a second region 31b on which the second light-emitting unit 20 is arranged. Specifically, the substrate 11 (first substrate) of the first light-emitting unit 10 is arranged in the first region 31a, and the substrate 21 (second substrate) of the second light-emitting unit 20 is arranged in the second region 31b. In other words, the first surface 31 is a substrate mounting surface. In this embodiment, the substrate 11 of the first light-emitting unit 10 and the substrate 21 of the second light-emitting unit 20 are placed on the first surface 31 so as to be in contact with the first surface 31. A thermal conductive sheet or the like may be inserted between the first surface 31 of the base 30 and the substrate 11 of the first light-emitting unit 10 and the substrate 21 of the second light-emitting unit 20.

[0047] The second region 31b is located outside the first region 31a. Specifically, the second region 31b surrounds the entire circumference of the first region 31a. In a top view, the first region 31a is a circular region, and the second region 31b is an annular region surrounding the first region 31a. The circle that constitutes the outer shape of the first region 31a and the circle that constitutes the outer shape of the second region 31b are concentric. In this embodiment, the radius of the circle that constitutes the outer shape of the first region 31a is smaller than the width (radial length) of the annular second region 31b. In other words, the width of the second region 31b is larger than the radius of the first region 31a. The center of the circle that constitutes the outer shape of the first region 31a is the center of the LED lamp 1.

[0048] The base 30 also functions as a heat sink to dissipate the heat generated in the first light-emitting section 10 and the second light-emitting section 20. Therefore, the base 30 is preferably made of a metal material such as aluminum or a resin material with high thermal conductivity. In this embodiment, the base 30 is made of metal, and is, for example, a metal plate made of aluminum.

[0049] The first light-emitting unit 10 and the second light-emitting unit 20, which are positioned on the base 30, are fixed to the base 30.

[0050] As shown in Figures 4 to 6, the first light-emitting unit 10 is fixed to the base 30 by a screw 121. The screw 121 is an example of a fixing member for fixing the first light-emitting unit 10 to the base 30. In this embodiment, the first light-emitting unit 10 is fixed to the base 30 not only by the screw 121 but also by the first holder 70. Specifically, the first light-emitting unit 10 is fixed to the base 30 with the substrate 11 pressed against the base 30 by the first holder 70. In this case, the substrate 11 of the first light-emitting unit 10 is sandwiched between a part of the first holder 70 and the base 30, and the screw 121 is inserted through the screw hole 71 of the first holder 70 (see Figures 3 and 5), and the screw 121 is screwed into the screw hole 33a of the base 30, thereby fastening the first holder 70, the substrate 11, and the base 30 together with the screw 121. This allows the first light-emitting unit 10 to be fixed to the base 30. As shown in Figures 3 and 4, three screws 121 are used, but this is not limited to three. Also, as shown in Figure 4, the three screws 121 may be provided on the periphery of the first region 31a on the first surface 31 of the base 30.

[0051] The first holder 70 is a light source holder that holds the first light-emitting unit 10. The first holder 70 is made of an insulating resin material such as polybutylene terephthalate (PBT).

[0052] As shown in Figures 4 and 6, the second light-emitting unit 20 is fixed to the base 30 by screws 122. Screws 122 are an example of a fixing member for fixing the second light-emitting unit 20 to the base 30. In this embodiment, the second light-emitting unit 20 is directly fixed to the base 30 by screws 122 alone. Specifically, the second light-emitting unit 20 can be fixed to the base 30 by inserting the screws 122 through the screw holes 21b (see Figures 3 and 6) formed in the substrate 21 of the second light-emitting unit 20 and screwing the screws 122 into the screw holes 33b of the base 30. As shown in Figures 3 and 4, three screws 122 are used, but this is not limited to three. Furthermore, the three screws 122 may be provided on the periphery of the second region 31b on the first surface 31 of the base 30. In this case, the screw holes 21b of the substrate 21 are formed at the outer edge of the substrate 21.

[0053] The first light-emitting unit 10 and the second light-emitting unit 20 emit light using power supplied from the power supply unit 50. The first light-emitting unit 10 and the second light-emitting unit 20 are driven independently by the power supply unit 50. Therefore, the current path from the power supply unit 50 to the first light-emitting unit 10 and the current path from the power supply unit 50 to the second light-emitting unit 20 are separate.

[0054] Specifically, the first light-emitting unit 10 and the power supply unit 50 are electrically connected by a pair of power lines 131 (first power lines) shown in Figures 3 and 4. More specifically, a pair of terminals 11a on the substrate 11 of the first light-emitting unit 10 and the power supply unit 50 are connected by a pair of power lines 131. In this case, one end of the pair of power lines 131 is connected to one of the pair of terminals 11a, and the other end of the pair of power lines 131 is connected to the other terminal 11a.

[0055] Furthermore, the second light-emitting unit 20 and the power supply unit 50 are electrically connected by a pair of power lines 132 (second power lines) shown in Figures 3 and 4. Specifically, a pair of terminals 21a on the substrate 21 of the second light-emitting unit 20 and the power supply unit 50 are connected by a pair of power lines 132. In this case, one end of the pair of power lines 132 is connected to one of the pair of terminals 21a, and the other end of the pair of power lines 132 is connected to the other terminal 21a.

[0056] The pair of power lines 131 and the pair of power lines 132 are power supply lines for supplying power to the first light-emitting unit 10 and the second light-emitting unit 20. In this embodiment, DC power is supplied to the first light-emitting unit 10 and the second light-emitting unit 20 from the power supply unit 50. Therefore, one of the pair of power lines 131 is a power supply line on the high-potential side, and the other of the pair of power lines 131 is a power supply line on the low-potential side. Similarly, one of the pair of power lines 132 is a power supply line on the high-potential side, and the other of the pair of power lines 132 is a power supply line on the low-potential side. The pair of power lines 131 and the pair of power lines 132 are lead wires composed of a core wire made of a conductive material such as alloy copper and an insulating resin coating covering the core wire.

[0057] As shown in Figures 5 and 6, a base 30 is located between the first light-emitting unit 10 and the second light-emitting unit 20 and the power supply unit 50. Therefore, the base 30 is provided with through holes 34 through which a pair of power lines 131 and a pair of power lines 132 are inserted. The through holes 34 are located in the first region 31a of the first surface 31 of the base 30.

[0058] Power is supplied from the power supply unit 50 to the first light-emitting unit 10 and the second light-emitting unit 20, causing light to be emitted from the first light-emitting unit 10 and the second light-emitting unit 20. The light emitted from the first light-emitting unit 10 and the second light-emitting unit 20 is incident on the optical member 40. The optical member 40 is made of a light-transmitting material, and the light from the first light-emitting unit 10 and the second light-emitting unit 20 that is incident on the optical member 40 passes through the optical member 40 and is emitted to the outside of the optical member 40.

[0059] As shown in Figures 5 and 6, the optical member 40 is a light-transmitting cover that covers the first light-emitting unit 10 and the second light-emitting unit 20. The optical member 40 is attached to the opening end of the opening 101 of the housing 100. In this case, the optical member 40 may be fixed to the housing 100 by fitting it into the housing 100 by providing a locking structure such as a locking claw and a locking hole at the opening end of the optical member 40 and the housing 100, or the optical member 40 may be fixed to the housing 100 by rotating it by forming screw grooves at the opening end of the optical member 40 and the housing 100.

[0060] The optical member 40 has a first light-transmitting section 41 through which the first light emitted from the first light-emitting section 10 passes, and a second light-transmitting section 42 through which the second light emitted from the second light-emitting section 20 passes. Therefore, the first light emitted from the first light-emitting section 10 enters the first light-transmitting section 41 of the optical member 40, passes through the first light-transmitting section 41, and exits to the outside. Similarly, the second light emitted from the second light-emitting section 20 enters the second light-transmitting section 42 of the optical member 40, passes through the second light-transmitting section 42, and exits to the outside.

[0061] Not all of the light emitted from the first light-emitting section 10 does not need to pass through the first light-transmitting section 41. For example, some of the light emitted from the first light-emitting section 10 may pass through the second light-transmitting section 42, or through parts of the optical member 40 other than the first light-transmitting section 41 and the second light-transmitting section 42. Similarly, not all of the light emitted from the second light-emitting section 20 does not need to pass through the second light-transmitting section 42. For example, some of the light emitted from the second light-emitting section 20 may pass through the first light-transmitting section 41, or through parts of the optical member 40 other than the first light-transmitting section 41 and the second light-transmitting section 42.

[0062] The first light-transmitting portion 41 faces the first light-emitting portion 10, and the second light-transmitting portion 42 faces the second light-emitting portion 20. Therefore, in a top view, the first light-transmitting portion 41 is positioned to overlap with the first region 31a of the base 30 on which the first light-emitting portion 10 is located, and the second light-transmitting portion 42 is positioned to overlap with the second region 31b of the base 30 on which the second light-emitting portion 20 is located. In this embodiment, since the first light-emitting portion 10 is located inside the second light-emitting portion 20, the first light-transmitting portion 41 is located inside the second light-transmitting portion 42. The second light-transmitting portion 42 is formed in an annular shape so as to surround the first light-transmitting portion 41.

[0063] The optical member 40 provides an optical effect to the light emitted from the first light-emitting unit 10 and the second light-emitting unit 20. For example, the optical member 40 may have a light distribution control function that controls the light distribution of the light emitted from the first light-emitting unit 10 and the second light-emitting unit 20.

[0064] In this embodiment, the optical member 40 is configured such that the optical effect of the first light-transmitting portion 41 on the first light and the optical effect of the second light-transmitting portion 42 on the second light are different. In other words, the optical member 40 is configured such that the optical characteristics of the light emitted from the first light-transmitting portion 41 and the second light-transmitting portion 42 are different. In this embodiment, the optical member 40 is configured such that the beam angle of the light emitted from the first light-transmitting portion 41 and the beam angle of the light emitted from the second light-transmitting portion 42 are different.

[0065] For example, the first light-transmitting section 41 has a focusing effect that concentrates the light from the first light-emitting section 10, and the second light-transmitting section 42 has a diffusing effect that diffuses (scatters) the light from the second light-emitting section 20. As a result, the beam angle of the light incident on the first light-transmitting section 41 and emitted from the first light-transmitting section 41 (i.e., the light from the first light-emitting section 10 that has passed through the first light-transmitting section 41) is smaller than the beam angle of the light incident on the second light-transmitting section 42 and emitted from the second light-transmitting section 42 (i.e., the light from the second light-emitting section 20 that has passed through the second light-transmitting section).

[0066] In this embodiment, the first light-transmitting portion 41 has a lens function. Specifically, as shown in Figure 7, the first light-transmitting portion 41 is a Fresnel lens and focuses the light from the first light-emitting portion 10 by refracting it. As a Fresnel lens, the first light-transmitting portion 41 has a central projection formed on the inner surface (light incident surface) of the first light-transmitting portion 41 and a plurality of annular projections concentrically surrounding the central projection. The central projection and the plurality of annular projections constitute the annular band of the Fresnel lens. Figure 7 is a perspective view of the optical member 40 in the LED lamp 1 as seen from the inner side.

[0067] For example, if the outer dimensions of the LED lamp 1 are φ70 mm, then, as shown in Figures 4 to 6, the outermost diameter φ1 of the first light-transmitting portion 41 (i.e., the outermost diameter of the Fresnel lens) is φ1 = 30.22 mm. In this embodiment, the outermost diameter φ1 of the first light-transmitting portion 41 is smaller than the diameter of the first region 31a of the first surface 31 of the base 30.

[0068] Furthermore, as shown in Figure 4, the three screws 121 are arranged such that the center of each screw 121 is located along a circle with a diameter of φ2 = 29.2 mm. Note that the three screws 121 are not arranged at equal intervals, but they may be arranged at equal intervals of 120°.

[0069] As shown in Figure 4, in a top view (when viewed from the light-emitting direction side of the LED lamp 1), at least a portion of the screw 121 overlaps with the first light-transmitting portion 41 of the optical member 40. In this case, as shown in Figures 5 and 6, the center of the screw 121 is preferably located on the innermost outermost part of the first light-transmitting portion 41. That is, it is preferable that φ2 < φ1.

[0070] Furthermore, it is preferable that the multiple LED packages 22 of the second light-emitting section 20 be positioned outside the outermost part of the first light-transmitting section 41. In other words, it is preferable that the multiple LED packages 22 be positioned along a circle with a diameter larger than the outermost diameter of the Fresnel lens that constitutes the first light-transmitting section 41.

[0071] The second light-transmitting portion 42 has the function of diffusing light by scattering and reflecting incident light. Specifically, as shown in Figure 7, a plurality of dimples 42a (recesses) are formed on the inner surface of the second light-transmitting portion 42. The plurality of dimples 42a are formed so as to cover almost the entire surface of the second light-transmitting portion 42. This gives the second light-transmitting portion 42 a light-diffusing function, so that the light transmitted through the second light-transmitting portion 42 can be diffused.

[0072] In this embodiment, the inner surface of the second translucent portion 42 is further textured. That is, the surface of the dimples 42a of the second translucent portion 42 is textured. By applying this textured finish to the inner surface of the second translucent portion 42, a microscopic uneven structure can be formed on the inner surface of the second translucent portion 42, making the inner surface of the second translucent portion 42 a cloudy white surface like frosted glass. Thus, by applying this textured finish in addition to forming multiple dimples 42a on the inner surface of the second translucent portion 42, the degree of diffusion of the second translucent portion 42 can be improved.

[0073] In this embodiment, the second translucent portion 42 is given a light-diffusing function by forming both a plurality of dimples 42a and a micro-textured uneven structure on its inner surface, but it is not limited to this. For example, the second translucent portion 42 may be given a light-diffusing function by forming only one of the plurality of dimples 42a and the micro-textured uneven structure on its inner surface.

[0074] Furthermore, in this embodiment, the process for forming a micro-relief structure on the inner surface of the second translucent portion 42 is a texturing process, but it is not limited to this. For example, the micro-relief structure on the inner surface of the second translucent portion 42 may be formed by etching or sandblasting.

[0075] Furthermore, the method for providing the second light-transmitting portion 42 with a light-diffusing function is not limited to forming dimples 42a and a micro-uneven structure on the inner surface of the second light-transmitting portion 42. Alternatively, a light-diffusing film may be formed on the inner surface of the second light-transmitting portion 42, a light-diffusing dot pattern may be printed on the second light-transmitting portion 42, a light-diffusing material may be dispersed inside the second light-transmitting portion 42, or a light-diffusing lens may be formed on the second light-transmitting portion 42. As the light-diffusing film, a milky white resin film containing a light-diffusing material such as silica or calcium carbonate can be used. As the light-diffusing lens, a lens array or a diverging lens that diffuses (diverges) light by refraction can be used.

[0076] Furthermore, the outer surface of the optical element 40 is further textured. In other words, the surface of the dimples 42a on the outer surface of the optical element 40 is textured. As a result, a micro-uneven structure is formed on the outer surface of the optical element 40. In this case, the micro-uneven structure (texture) formed on the outer surface of the optical element 40 is different from the micro-uneven structure (texture) formed on the inner surface of the second light-transmitting part 42. Specifically, the micro-uneven structure formed on the outer surface of the optical element 40 is thinner than the micro-uneven structure formed on the inner surface of the second light-transmitting part 42.

[0077] Furthermore, in this embodiment, the surface of the central projection of the first light-transmitting portion 41 constituting the Fresnel lens is further textured. That is, a micro-uneven structure (texture) is formed on the surface of the central projection of the first light-transmitting portion 41. In this case, the micro-uneven structure formed on the surface of the central projection is preferably a thin texture. Note that the surfaces of the multiple annular projections of the first light-transmitting portion 41 are not textured. In other words, in the first light-transmitting portion 41, the texture is formed only on the central projection among the central projection and annular projections. Also, the surface of the central projection of the first light-transmitting portion 41 does not necessarily have to be textured.

[0078] As described above, in this embodiment, the first translucent portion 41 (Fresnel portion) has dimples 40a formed on its outer surface and a thin texture formed on the central protrusion on its inner surface. The second translucent portion 42 (diffusing portion) has dimples and texture formed on both its outer and inner surfaces.

[0079] Furthermore, a pair of protrusions 43 are provided on the outer surface of the optical element 40. The pair of protrusions 43 function as hooks for the user's fingers to grip when rotating the LED lamp 1 to attach it to the lighting fixture. By providing the pair of protrusions 43, the LED lamp 1 can be easily rotated, making it easy to attach the LED lamp 1 to and remove it from the lighting fixture.

[0080] The optical component 40 is formed using a light-transmitting material. In this embodiment, the optical component 40 is formed into a predetermined shape using a mold or the like, using a transparent resin material such as acrylic or polycarbonate, or a transparent material such as glass.

[0081] As shown in Figures 5 and 6, the power supply unit 50 is located on the second surface 32 side of the base 30. In other words, the power supply unit 50 is located on the opposite side from the first surface 31 side of the base 30. The power supply unit 50 is housed in the space enclosed by the base 30 and the housing 100.

[0082] The power supply unit 50 constitutes a power supply circuit for supplying power to the first light-emitting unit 10 and the second light-emitting unit 20. The power supply unit 50 generates power to cause the first light-emitting unit 10 and the second light-emitting unit 20 to emit light. For example, the power supply unit 50 converts the AC power supplied from the pair of pins 110 into DC power and supplies the DC power to the first light-emitting unit 10 and the second light-emitting unit 20.

[0083] The power supply unit 50 includes a circuit board 51 and a plurality of circuit elements (not shown) mounted on the circuit board 51. The circuit board 51 is a printed circuit board (PCB) on which metal wiring such as copper foil is patterned. In this embodiment, the circuit board 51 is, for example, a plate-shaped board with a part of a disc cut out. The plurality of circuit elements are, for example, capacitive elements such as electrolytic capacitors and ceramic capacitors, inductor elements such as choke coils and choke transformers, transistor elements such as FETs, resistive elements such as resistors, or diodes.

[0084] The power supply unit 50 may also include a dimming circuit for dimming the first light-emitting unit 10 and the second light-emitting unit 20. Furthermore, the power supply unit 50 may include other control circuits, such as a wireless communication circuit.

[0085] As shown in Figures 5 and 6, the power supply unit 50 is covered by an insulating cover 60. The insulating cover 60 is positioned between the base 30 and the power supply unit 50. The insulating cover 60 is made of an insulating resin material such as PBT.

[0086] As shown in Figures 3 to 6, the insulating cover 60 is provided with through holes 61a through which a pair of power lines 131 and a pair of power lines 132 are inserted. As shown in Figures 4 and 6, the through holes 61a are located in positions corresponding to the first region 31a of the first surface 31 of the base 30. In other words, in a top view, the through holes 61a are located in the first region 31a of the first surface 31 of the base 30. This reduces the proportion of the second region 31b of the first surface 31 of the base 30 occupied by the through holes 61a, thereby increasing the degree of freedom in the layout of the multiple LED packages 22 included in the second light-emitting unit 20 arranged in the second region 31b.

[0087] In this embodiment, the through-hole 61a exists not only in the first region 31a of the first surface 31, but also in the second region 31b. That is, the through-hole 61a exists across both the first region 31a and the second region 31b, and is present in both the first region 31a and the second region 31b. However, the proportion occupied by the through-hole 61a is larger in the first region 31a than in the second region 31b. In other words, the area of ​​the through-hole 61a in the first region 31a is larger than the area of ​​the through-hole 61a in the second region 31b. Note that the through-hole 61a may exist only in the first region 31a of the two regions 31b.

[0088] As shown in Figures 6 and 9, in this embodiment, the insertion hole 61a is a cylindrical hole in a cylindrical portion 61 provided in the insulating cover 60. The cylindrical portion 61 is formed to protrude toward the optical member 40 from the base 30 side surface of the insulating cover 60. Figure 9 is an enlarged perspective view showing a part of the insulating cover 60. As shown in Figure 9, in this embodiment, the cylindrical portion 61 is substantially rectangular, and the top view shape of the cylindrical portion 61 is substantially rectangular. Note that the shape of the cylindrical portion 61 is not limited to a rectangular shape, and may be cylindrical or the like.

[0089] In this way, by making the insertion holes 61a through which the power lines 131 and 132 are inserted into the cylindrical portion 61 provided in the insulating cover 60, the power lines 131 and 132 inserted into the insertion holes 61a can be protected by the cylindrical portion 61 of the insulating cover 60. This prevents the power lines 131 and 132 from being damaged or broken by the edges of the through holes 34 in the base 30. In addition, by inserting the power lines 131 and 132 into the cylindrical portion 61 of the insulating cover 60, it is possible to prevent the power lines 131 and 132 from getting caught in the wires. For example, it is possible to prevent the power lines 131 and 132 from getting caught between the base 30 and the first light-emitting unit 10 or the second light-emitting unit 20, or between the base 30 and the insulating cover 60.

[0090] As shown in Figure 6, the opening portion of the insertion hole 61a on the optical member 40 side (upper side in Figure 6) is higher on the second region 31b side than on the first region 31a side. This prevents the resin material, such as silicone resin, that seals the insertion hole 61a from protruding into the second region 31b side, thereby preventing the resin material from covering the LED package 22 of the second light-emitting unit 20 located in the second region 31b.

[0091] Specifically, as shown in Figure 9, the height of the insulating cover 60 of the cylindrical portion 61 from the base 30 side is partially different, and as shown in Figure 6, the height of the cylindrical portion 61 on the second region 31b side is higher than the height of the first region 31a side. In other words, at the opening of the cylindrical portion 61 on the optical member 40 side, the portion on the second region 31b side protrudes more than the portion on the first region 31a side. As shown in Figure 9, in this embodiment, in the rectangular cylindrical portion 61, the height of one of the four side walls is higher.

[0092] As shown in Figure 6, the cylindrical portion 61 of the insulating cover 60 passes through the through-hole 34 of the base 30. In other words, the insulating cover 60 is positioned on the power supply unit 50 side of the base 30 with the cylindrical portion 61 passing through the through-hole 34 of the base 30. This further suppresses the pinching of the power lines 131 and 132. In particular, it prevents the power lines 131 and 132 from getting caught between the base 30 and the insulating cover 60.

[0093] The cylindrical portion 61 protrudes beyond the substrate 11 of the first light-emitting unit 10 and the substrate 21 of the second light-emitting unit 20. In other words, the open end face of the cylindrical portion 61 on the optical member 40 side is located on the optical member 40 side of the surfaces of the substrates 11 and 21. Furthermore, in this embodiment, the cylindrical portion 61 protrudes beyond the upper surface of the first holder 70 for holding the first light-emitting unit 10. Therefore, the insulating cover 60 is arranged such that the cylindrical portion 61 protrudes from the first holder 70. This reliably prevents the power lines 131 and 132 from being pinched between the base 30 and the first light-emitting unit 10 or the second light-emitting unit 20.

[0094] As shown in Figures 10 and 11, a pair of power wires 131 and a pair of power wires 132 are inserted through the insertion holes 61a of the cylindrical portion 61, which are connected to the through holes 34 of the base 30. Figure 10 is a perspective view showing the cylindrical portion 61 and the surrounding portion of the cylindrical portion 61 of the insulating cover 60 when the pair of power wires 131 and a pair of power wires 132 are not inserted through the insertion holes 61a, and Figure 11 is a perspective view showing the cylindrical portion 61 and the surrounding portion of the cylindrical portion 61 when the pair of power wires 131 and a pair of power wires 132 are inserted through the insertion holes 61a.

[0095] As shown in Figure 11, the conductive portion of one end of a pair of power lines 131 inserted through the through hole 61a is connected to a pair of terminals 11a on the substrate 11 of the first light-emitting unit 10. Similarly, the conductive portion of one end of a pair of power lines 132 inserted through the through hole 61a is connected to a pair of terminals 21a on the substrate 21 of the second light-emitting unit 20.

[0096] Although not shown in the diagram, the insertion hole 61a of the cylindrical portion 61 is molded with a resin material such as silicone resin while a pair of power wires 131 and a pair of power wires 132 are inserted through it. For example, after inserting the pair of power wires 131 and a pair of power wires 132 through the insertion hole 61a of the cylindrical portion 61, the insertion hole 61a is molded by applying liquid silicone resin. This seals the insertion hole 61a with silicone resin, preventing insects from entering the first light-emitting portion 10 (second light-emitting portion 20) from the power supply portion 50 through the insertion hole 61a. In other words, it prevents insects from entering the space between the optical member and the first light-emitting portion 10 and the second light-emitting portion 20. Therefore, after the LED lamp 1 is installed in the lighting fixture, it is possible to prevent insects (or dead insects) from being present on the inner surface of the optical member 40 and appearing as black spots through the optical member 40.

[0097] As shown in Figures 5 and 6, the insulating cover 60 is provided with a recess 62a for housing the screw legs of the screw 121 that penetrates the screw hole 33a of the base 30. This prevents malfunctions in the power supply unit 50 caused by the screw legs of the screw 121. Also, as shown in Figure 6, the insulating cover 60 is provided with a recess 62b for housing the screw legs of the screw 122 that penetrates the screw hole 33b of the base 30. This prevents malfunctions in the power supply unit 50 caused by the screw legs of the screw 122.

[0098] The power supply unit 50 is held by the second holder 80. The second holder 80 is a circuit holder that holds the power supply unit 50, which constitutes the power supply circuit. Specifically, the power supply unit 50 is held by the second holder 80 by the end of the circuit board 51 being locked into a locking claw 81 (see Figure 3) provided on the second holder 80. The second holder 80 is made of an insulating resin material such as polybutylene terephthalate (PBT). In this embodiment, the second holder 80 is a frame-shaped structure. The second holder 80 is located between the bottom 103 of the housing 100 and the heat sink 90. ​​The second holder 80 is provided with an insertion hole through which the pin 110 is inserted.

[0099] The heat sink 90 shown in Figures 3 and 5 is a heat dissipation member that dissipates heat generated in the first light-emitting unit 10 and the second light-emitting unit 20, and is thermally coupled to the first light-emitting unit 10 and the second light-emitting unit 20. Therefore, the heat sink 90 is preferably made of a metal material or a resin material with high thermal conductivity in order to efficiently dissipate the heat generated in the first light-emitting unit 10 and the second light-emitting unit 20. In this embodiment, the heat sink 90 is made of aluminum. Also, as shown in Figure 5, the heat sink 90 surrounds the power supply unit 50 and has the function of dissipating heat generated in the power supply unit 50. The heat sink 90 is located inside the housing 100. Specifically, the heat sink 90 is placed on the bottom 103 of the housing 100. The heat sink 90 is formed in the shape of an L-shaped frame in cross-section.

[0100] As shown in Figures 5 and 6, the housing 100 is a housing that houses the power supply unit 50, the second holder 80, and the heat sink 90. ​​As shown in Figures 3 and 5, the housing 100 is a substantially bottomed cylindrical shape with an opening 101, and has side walls 102 and a bottom 103.

[0101] As shown in Figure 5, the opening 101 of the housing 100 is closed by the base 30. The opening 101 is covered by the optical element 40. The side wall 102 of the housing 100 is cylindrical and is erected on the bottom 103.

[0102] As shown in Figures 1 and 5, the bottom 103 of the housing 100 is formed to have a step. Specifically, the central part of the bottom 103 is formed to protrude outward in a cylindrical shape. As shown in Figures 5 and 6, the second holder 80 is placed on the bottom 103. Also, as shown in Figure 5, the bottom 103 is provided with through holes through which the pins 110 are inserted. Since there are two pins 110, there are two of these through holes.

[0103] The housing 100 is made of a resin material such as polybutylene terephthalate (PBT) or a metal material such as aluminum. In this embodiment, the housing 100 is an insulating housing made of PBT. This makes it easier to ensure the insulation of the power supply unit 50. In other words, the housing 100 functions as both an outer cover that constitutes the outer casing of the LED lamp 1 and an insulating cover that covers the power supply unit 50.

[0104] The pins 110 are conductive lamp pins (base pins) and have the function of receiving power from outside the LED lamp 1 to illuminate the first light-emitting part 10 and the second light-emitting part 20. For example, a pair of pins 110 receive AC power (for example, AC power from a commercial power supply of AC100V) from the socket of a lighting fixture. The pins 110 are electrically connected to the power supply unit 50, and the power received by the pins 110 is supplied to the power supply unit 50. In this embodiment, two pairs of pins 110 are provided. The pair of pins 110 are located opposite each other. As shown in Figure 5, each pin 110 is inserted through an insertion hole provided in the bottom 103 of the housing 100 and an insertion hole provided in the second holder 80, and is fixed to the housing 100.

[0105] Each pin 110 has one end located inside the housing 100 and is electrically connected to the power supply unit 50. The other end of each pin 110 is exposed outside the housing 100 and is electrically connected to the conductive part of the socket when the LED lamp 1 is installed in the socket of the lighting fixture. Therefore, the pins 110 also function as mounting points for attaching the LED lamp 1 to the lighting fixture. The pair of pins 110 are installed in the socket of the lighting fixture, thereby holding the LED lamp 1 in place.

[0106] In the LED lamp 1 configured in this way, illumination light can be emitted in multiple modes by selectively controlling the on / off states of the first light-emitting section 10 and the second light-emitting section 20, respectively.

[0107] Specifically, as shown in Figure 12, by turning on the first light-emitting unit 10 and turning off the second light-emitting unit 20 (when only the first light-emitting unit 10 is turned on), the LED lamp 1 enters a focusing mode, and focused illumination light is emitted from the LED lamp 1.

[0108] In the focusing mode shown in Figure 12, most of the light emitted from the first light-emitting unit 10 passes through the first light-transmitting section 41 of the optical element 40 and exits the optical element 40 to the outside. At this time, the light emitted from the first light-emitting unit 10 is refracted and focused by the first light-transmitting section 41, which is a Fresnel lens. As a result, the light that passes through the first light-transmitting section 41 and exits to the outside is focused into a spot of light.

[0109] Furthermore, in this embodiment, the color temperature of the light from the first light-emitting unit 10 is 5000K, which is daylight white. Therefore, in the focusing mode, the focused light from the first light-emitting unit 10 with a color temperature of 5000K can create a natural-looking atmosphere in the illuminated space (room, etc.).

[0110] On the other hand, as shown in Figure 13, by turning on the second light-emitting unit 20 and turning off the first light-emitting unit 10 (when only the second light-emitting unit 20 is turned on), the LED lamp 1 enters diffusion mode, and diffused illumination light is emitted from the LED lamp 1.

[0111] In the diffusion mode shown in Figure 13, most of the light emitted from the second light-emitting unit 20 passes through the second light-transmitting section 42 of the optical element 40 and exits the optical element 40 to the outside. At this time, the light emitted from the second light-emitting unit 20 is diffused by the second light-transmitting section 42, which has a diffusion function. As a result, the light that passes through the second light-transmitting section 42 and exits to the outside becomes diffused and spread out. Therefore, the beam angle of the light from the second light-emitting unit 20 that has passed through the second light-transmitting section 42 is larger than the beam angle of the light from the first light-emitting unit 10 that has passed through the first light-transmitting section 41. In other words, the beam angle of the light from the first light-emitting unit 10 that has passed through the first light-transmitting section 41 is smaller than the beam angle of the light from the second light-emitting unit 20 that has passed through the second light-transmitting section 42.

[0112] Furthermore, in this embodiment, the color temperature of the light from the second light-emitting unit 20 is 2700K, which is the color temperature of an incandescent bulb. Therefore, in diffuse mode, the diffused light from the second light-emitting unit 20 with a color temperature of 2700K can provide a sense of relaxation to people in the illuminated space.

[0113] In this way, the LED lamp 1 can emit illumination light in two modes, a focused mode (Figure 12) and a diffused mode (Figure 13), by switching the first light-emitting section 10 and the second light-emitting section 20 on and off. This makes it possible to create different lighting environments with a single LED lamp 1.

[0114] Specifically, the light distribution of the illumination can be switched by switching the illumination of the first light-emitting unit 10 and the second light-emitting unit 20. Therefore, the light distribution of the illumination can be changed without replacing the LED lamp 1, thus changing the atmosphere of the lighting space. Moreover, in this embodiment, not only can the light distribution of the illumination be switched, but the color temperature of the illumination can also be switched simultaneously with the light distribution. In other words, both the light distribution and color temperature of the illumination can be changed without replacing the LED lamp 1.

[0115] In this embodiment, when illuminating light is emitted from the LED lamp 1, when one of the first light-emitting unit 10 and the second light-emitting unit 20 is lit, the other is turned off, and the first light-emitting unit 10 and the second light-emitting unit 20 are switched exclusively, but this is not limited to this configuration. For example, there may be a mode in which the first light-emitting unit 10 and the second light-emitting unit 20 are lit simultaneously. Also, when illuminating light is not emitted from the LED lamp 1, both the first light-emitting unit 10 and the second light-emitting unit 20 will be turned off. Furthermore, the lighting and turning off of the first light-emitting unit 10 and the second light-emitting unit 20 can be controlled by an infrared remote control and / or a smartphone. In this case, the LED lamp 1 has a receiver that receives infrared signals from the infrared remote control and / or a wireless module that receives wireless signals from a smartphone.

[0116] As described above, the LED lamp 1 according to this embodiment comprises a first light-emitting section 10 that emits first light in focusing mode, a second light-emitting section 20 that emits second light in diffusion mode, a base 30 having a first surface 31 which is an arrangement surface including a first region 31a on which the first light-emitting section 10 is arranged and a second region 31b on which the second light-emitting section 20 is arranged, and an optical member 40 having a first light-transmitting section 41 through which the first light from the first light-emitting section 10 is transmitted and a second light-transmitting section 42 through which the second light from the second light-emitting section 20 is transmitted. The optical member 40 is configured such that the optical characteristics of the light emitted from the first light-transmitting section 41 and the second light-transmitting section 42 are different, and the second light-emitting section 20 is located outside the first light-emitting section 10.

[0117] This configuration allows for illumination in two modes, a focused mode and a diffused mode, by switching the first light-emitting unit 10 and the second light-emitting unit 20 on and off. This makes it possible to change the light distribution of the illumination without replacing the LED lamp 1.

[0118] Furthermore, in the LED lamp 1 according to this embodiment, the first light-transmitting portion 41 of the optical member 40 is a Fresnel lens.

[0119] This configuration allows the light from the first light-emitting unit 10 that passes through the first light-transmitting portion 41 of the optical element 40 to be focused and concentrated. This makes it easy to achieve the concentrated light mode when the first light-emitting unit 10 is lit.

[0120] Furthermore, the LED lamp 1 according to this embodiment is equipped with a screw 121 as a fixing member for fixing the first light-emitting part 10 to the base 30, and when viewed from the light-emitting direction side of the LED lamp 1, at least a part of the screw 121 overlaps with the first light-transmitting part 41 of the optical member 40.

[0121] In this configuration, the screw 121 is positioned below the first light-transmitting part 41, which is a Fresnel lens, so the screw 121 is hidden by the first light-transmitting part 41. As a result, the screw 121 is difficult to see through the first light-transmitting part 41, which is a Fresnel lens, making it difficult for the user to recognize the screw 121 when the LED lamp 1 is turned off. Therefore, the aesthetic appearance of the LED lamp 1 when it is turned off can be improved.

[0122] Furthermore, in the LED lamp 1 according to this embodiment, the center of the screw 121 is located inward from the outermost part of the first light-transmitting portion 41 of the optical member 40.

[0123] This configuration makes the screws 121 even less visible through the first light-transmitting section 41, thereby further improving the aesthetic appearance of the LED lamp 1 when it is turned off.

[0124] Furthermore, in the LED lamp 1 according to this embodiment, the outermost diameter of the first light-transmitting portion 41 is smaller than the diameter of the first region 31a of the base 30.

[0125] This configuration allows the screw 121 to be easily positioned near the boundary between the first translucent portion 41 and the second translucent portion 42 (i.e., near the outermost diameter of the first translucent portion 41) when the screw 121 is placed on the periphery of the first region 31a of the base 30. This makes the screw 121 even less visible through the first translucent portion 41, thereby further improving the aesthetic appearance of the LED lamp 1 when it is turned off.

[0126] Furthermore, in the LED lamp 1 according to this embodiment, the second light-emitting section 20 has a substrate 21 and a plurality of LED packages 22 arranged on the substrate 21, and the plurality of LED packages 22 are arranged to the outside of the outermost part of the first light-transmitting section 41.

[0127] In this regard, the inventors of the present invention conducted experiments and found that if the LED package 22 is placed inside the outermost part of the first light-transmitting section 41, the LED package 22 will be reflected in the Fresnel lens when the second light-emitting section 20 is lit. For example, if the LED package 22 is arranged along a circle with a diameter of φ51 mm, and the outermost diameter φ1 of the Fresnel lens constituting the first light-transmitting section 41 is 64.3 mm, the LED package 22 will be reflected in the Fresnel lens. Also, even if the outermost diameter φ1 of the Fresnel lens constituting the first light-transmitting section 41 is 30.22 mm, if the LED package 22 is arranged along a circle with a diameter of φ28 mm or less, the LED package 22 will be reflected in the Fresnel lens. In contrast, by placing multiple LED packages 22 outside the outermost part of the first light-transmitting section 41, it was possible to suppress the reflection of the LED package 22 in the first light-transmitting section 41, which is a Fresnel lens, when the second light-emitting section 20 is lit. This improves the aesthetic appearance of the LED lamp 1 when the second light-emitting section 20 is lit.

[0128] Thus, according to the LED lamp 1 of this embodiment, by arranging the screw 121 for fixing the first light-emitting part 10 near the outermost edge of the first light-transmitting part 41, which is a Fresnel lens, and by arranging the LED package 22 of the second light-emitting part 20 further out than the outermost edge of the first light-transmitting part 41, the appearance and design of the LED lamp 1 can be significantly improved.

[0129] Furthermore, in the LED lamp 1 according to this embodiment, the first light-transmitting section 41 concentrates the first light emitted by the first light-emitting section 10, and the second light-transmitting section 42 diffuses the second light emitted by the second light-emitting section 20.

[0130] With this configuration, the LED lamp 1 can be easily switched to focusing mode by turning on the first light-emitting unit 10, and the LED lamp 1 can be easily switched to diffusion mode by turning on the second light-emitting unit 20.

[0131] (modified version) Although the lighting device and the like according to the present invention have been described above based on embodiments, the present invention is not limited to the above embodiments.

[0132] For example, in the above embodiment, four power lines, a pair of power lines 131 and a pair of power lines 132, were inserted through one insertion hole 61a, but this is not limited to this. Specifically, multiple insertion holes 61a may be provided, and a pair of power lines 131 and a pair of power lines 132 may be inserted separately through multiple insertion holes 61a.

[0133] Furthermore, in the above embodiment, the first light-emitting section 10 is a COB type LED module and the second light-emitting section 20 is an SMD type LED module, but the invention is not limited to this. For example, the first light-emitting section 10 may be an SMD type LED module and the second light-emitting section 20 may be a COB type LED module. In this case, since the insertion hole 61a is located in the first region 31a of the first surface 31, the degree of freedom in the layout of the multiple LED chips (light sources) included in the LED light-emitting section of the second light-emitting section 20 can be increased. Alternatively, both the first light-emitting section 10 and the second light-emitting section 20 may be SMD type LED modules, or both the first light-emitting section 10 and the second light-emitting section 20 may be COB type LED modules. When the second light-emitting section 20, which is located outside the first light-emitting section 10, is a COB type LED module, multiple LED chips can be arranged in a ring shape on the substrate 21, and a phosphor-containing resin that encapsulates the multiple LED chips together can be formed in a ring shape. Furthermore, if the first light-emitting section 10 located inside the second light-emitting section 20 is an SMD type LED module, it is preferable to arrange multiple LED packages densely in the center.

[0134] Furthermore, although the first light-transmitting portion 41 and the second light-transmitting portion 42 were integrally formed as an optical member 40 in the above embodiment, this is not limited to this. For example, the first light-transmitting portion 41 and the second light-transmitting portion 42 may be configured as separate components. In this case, the first light-transmitting portion 41 may be the first optical member, and the second light-transmitting portion 42 may be the second optical member, and the optical member 40 may be formed by connecting these two.

[0135] Furthermore, in the above embodiment, the first light-transmitting section 41 is configured to have an optical effect of concentrating transmitted light, and the second light-transmitting section 42 is configured to have an optical effect of diffusing transmitted light, but the invention is not limited to this. For example, the first light-transmitting section 41 may be configured to have an optical effect of diffusing transmitted light, and the second light-transmitting section 42 may be configured to have an optical effect of concentrating transmitted light. Also, one or both of the first light-transmitting section 41 and the second light-transmitting section 42 do not have an optical effect. In this case, a lens member that imparts an optical effect to the light emitted from the first light-emitting section 10 and the second light-emitting section 20 may or may not be provided.

[0136] Furthermore, although the above embodiment described the LED as being configured to emit white light using a blue LED chip and a phosphor-containing resin containing a yellow phosphor, the invention is not limited to this. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used and combined with a blue LED chip to emit white light. In addition, to improve color rendering, a red phosphor or a green phosphor may be added in addition to the yellow phosphor. Furthermore, an LED chip that emits light of a color other than blue may be used. For example, an ultraviolet LED chip that emits ultraviolet light with a shorter wavelength than the blue light emitted by the blue LED chip may be used, and the invention is configured to emit white light using a blue phosphor, a green phosphor, and a red phosphor that are mainly excited by ultraviolet light and emit blue light, red light, and green light, respectively.

[0137] Furthermore, in the above embodiment, one or both of the first light-emitting unit 10 and the second light-emitting unit 20 may be configured to be color-controllable. For example, by having one or both of the first light-emitting unit 10 and the second light-emitting unit 20 include a red LED that emits red light, a green LED that emits green light, and a blue LED that emits blue light, RGB control can be performed in each light-emitting unit. In this case, the power supply unit 50 has a color-control circuit. In addition, color-control may be performed by the first light-emitting unit 10 and the second light-emitting unit 20 in the above embodiment, even if they emit light with different color temperatures.

[0138] Furthermore, this disclosure also includes forms obtained by applying various modifications to the above embodiments that a person skilled in the art could conceive, and forms realized by arbitrarily combining the components and functions of the embodiments without departing from the spirit of the present invention. In addition, the present invention also includes any combination of two or more claims from among the multiple claims described in the claims at the time of filing the present application, provided that such combination is not technically contradictory. For example, if the cited claims described in the claims at the time of filing the present application are made into a multi-claim or multi-multi-claim so as to refer to all of the higher-level claims without technically contradictory, then all combinations of claims included in that multi-claim or multi-multi-claim are also included in the present invention. [Explanation of symbols]

[0139] 1 LED lamp (lighting device) 10 First light-emitting section 12 LED light-emitting section 20 Second light-emitting section 21 circuit boards 22 LED Package 30 bases 31a 1st area 31b 2nd area 40 Optical components 41 1st transparent part 42 2nd transparent part 121, 122 Screws (fixing components)

Claims

1. A lighting device, A first light-emitting section that emits a first light in the focusing mode, A second light-emitting section that emits a second light in diffusion mode, A base having an arrangement surface that includes a first region on which the first light-emitting unit is arranged and a second region on which the second light-emitting unit is arranged, An optical member that covers the first light-emitting portion and the second light-emitting portion, and has a first light-transmitting portion through which the first light is transmitted and a second light-transmitting portion through which the second light is transmitted, The device comprises a fixing member for fixing the first light-emitting unit to the base, The optical member is configured such that the optical properties of the light emitted from the first light-transmitting portion and the second light-transmitting portion are different between the first light-transmitting portion and the second light-transmitting portion. The second light-emitting part is located outside the first light-emitting part, When viewed from the light emission direction side of the lighting device, at least a portion of the fixing member overlaps with the first light-transmitting portion. Lighting device.

2. Furthermore, A power supply unit for supplying power to the first light-emitting unit and the second light-emitting unit, The system comprises an insulating cover positioned between the base and the power supply unit, The first light-emitting unit and the power supply unit are connected by a first power line. The second light-emitting unit and the power supply unit are connected by a second power line. The insulating cover is provided with through holes through which the first power line and the second power line are inserted. In a top view, the insertion hole is located in the first region. The lighting device according to claim 1.

3. The first light-transmitting part is a Fresnel lens. The lighting device according to claim 1 or 2.

4. The center of the fixing member is located inward from the outermost part of the first light-transmitting portion. The lighting device according to claim 3.

5. The outermost diameter of the first light-transmitting portion is smaller than the diameter of the first region. The lighting device according to claim 3.

6. The second light-emitting unit comprises a substrate and a plurality of LED packages arranged on the substrate. The plurality of LED packages are arranged to be outside the outermost part of the first light-transmitting section. The lighting device according to claim 1 or 2.

7. The first light-transmitting section concentrates the first light, The second light-transmitting portion diffuses the second light. The lighting device according to claim 1 or 2.

8. A lighting device according to claim 1 or 2, The fixture comprises the aforementioned lighting device to which the fixture is detachably attached. Lighting fixtures.

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