Lighting device

Abstract

In a lighting device with a configuration that enables color tuning, the parts that contribute to color tuning are made smaller. [Solution] The lighting device 1 has a light-emitting element 4, a holding part 30, a housing part 6, and a base 42. The light-emitting element 4 comprises a base part 10 on which one side is a mounting surface 12, and a plurality of light-emitting parts 20 mounted on the mounting surface 12. The holding part 30 holds the light-emitting element 4. The housing part 6 comprises a light-transmitting part 8 and a fixing part 46 which are light-transmitting and arranged to cover the light-emitting element 4, and houses the light-emitting element 4 and the holding part 30. The light-emitting element 4 has a light-emitting part 21 of a first color and a light-emitting part 22 of a second color mounted on a common mounting surface 12.

Description

Technical Field

[0001] This disclosure relates to lighting devices.

Background Art

[0002] Patent Document 1 discloses a technology related to a dimming control device and a dimming device. The dimming device disclosed in Patent Document 1 has a configuration including a dimming control device, a dimmer, and an LED (Light Emitting Diode), and is usable as a lighting device for the interior of a building.

[0003] Patent Document 2 discloses a lighting device configured as an LED bulb. This lighting device includes a base as a power connection part for fitting into an external socket and electrically connecting to a commercial power supply, a heat dissipation part, a connecting body connecting the base and the heat dissipation part, a translucent part in the shape of a hollow substantially hemispherical shell, and a disc-shaped heat dissipation plate. Further, in the lighting device disclosed in Patent Document 2, an LED module that emits white light and an LED module that emits bulb-colored light are alternately arranged in a ring shape, and a device for performing color adjustment control of these LED modules is built in.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The lighting device described in Patent Document 2 has a configuration in which LED modules are independently configured for each color, and these LED modules are dispersed and arranged within a light-transmitting section of a hollow, approximately hemispherical shell. In such a configuration, if a predetermined number of LED modules of a certain color are arranged, a required number of LED modules of other colors must be arranged to achieve color matching, which tends to increase the number of modules. As a result, the internal configuration tends to become large, and in particular, there is a problem in that it is difficult to miniaturize the parts that contribute to color matching.

[0006] One of the purposes of this disclosure is to provide a technology that can further miniaturize the parts that contribute to color tuning in a lighting device having a configuration that enables color tuning. [Means for solving the problem]

[0007] One of the disclosures is a lighting device, A light-emitting body comprising a base portion having one side as a mounting surface, and a plurality of light-emitting parts mounted on the mounting surface, A holding part for holding the light-emitting element, A light-transmitting portion having light-transmitting properties and positioned to cover the light-emitting element, a fixing portion fixed to the light-transmitting portion, and a housing portion that houses the light-emitting element and the holding portion, The nozzle and It has, The light-emitting element is mounted on a common mounting surface, with the light-emitting portion of the first color and the light-emitting portion of the second color being mounted together. [Effects of the Invention]

[0008] According to the technology disclosed herein, in a lighting device having a configuration that enables color tuning, the parts that contribute to color tuning can be made smaller. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic perspective view illustrating a lighting device according to the first embodiment. [Figure 2] Figure 2 is a schematic perspective view illustrating the usage state of the lighting device according to the first embodiment when it is installed on an object. [Figure 3] FIG. 3 is a perspective view illustrating a unit in which a housing portion is omitted from the lighting device of FIG. 1 and a holding portion, a light-emitting body, and a color-adjusting circuit are integrated. [Figure 4] FIG. 4 is an explanatory view showing a state in which the unit of FIG. 3 is unfolded. [Figure 5] FIG. 5 is an enlarged view showing an enlarged portion of the light-emitting body of the lighting device of FIG. 1. [Figure 6] FIG. 6 is a schematic cross-sectional view schematically showing the A-A cross section of FIG. 5. [Figure 7] FIG. 7 is a circuit diagram illustrating a circuit configuration for color adjustment. [Figure 8] FIG. 8 is a circuit diagram specifically showing a part of the circuit diagram of FIG. 7. [Figure 9] FIG. 9 is an explanatory view partially explaining a wiring structure in the light-emitting body holding portion. [Figure 10] FIG. 10 is an explanatory view for simply and conceptually explaining an enlarged view near a curved outer surface of the lighting device according to the first embodiment. [Figure 11] FIG. 11 is an explanatory view explaining a comparative example for comparison with the configuration of FIG. 10.

MODE FOR CARRYING OUT THE INVENTION

[0010] Each of the following [1] to [8] is an example of a technology such as an object or a method included in the present disclosure.

[0011] 〔1〕 A light-emitting body including a base portion having one surface as a mounting surface and a plurality of light-emitting portions mounted on the mounting surface, a holding portion for holding the light-emitting body, a light-transmitting portion having light-transmitting properties and disposed so as to cover the light-emitting body, and a fixing portion fixed to the light-transmitting portion, and a housing portion for housing the light-emitting body and the holding portion, a base, and having the light-emitting body is such that the light-emitting portions of the first color and the light-emitting portions of the second color are mounted on the common mounting surface lighting device.

[0012] The lighting device according to [1] is a lighting device having a base and a light emitter accommodated in an accommodation part, and the light emitter is configured in such a form that light emitting parts of two or more colors are mounted on a base part having a mounting surface. Therefore, this lighting device can compactly realize a configuration capable of achieving color adjustment in the vicinity of a common mounting surface, and the main parts contributing to color adjustment can be made smaller.

[0013] [2] Having a plurality of the above light emitters, The plurality of light emitters are held by the holding part in an arrangement having at least any one of forms in which the plurality of base parts are arranged linearly, arranged annularly, or arranged dispersedly. Pairs in which the light emitting part of the first color and the light emitting part of the second color are adjacently arranged on the common mounting surface in the base part are arranged in at least any one of forms in which they are arranged linearly, arranged annularly, or arranged dispersedly. The lighting device according to [1].

[0014] The lighting device according to [2] above can arrange a plurality of combinations of a light emitting part of a first color and a light emitting part of a second color for realizing a color adjustment function in a form covering a wider range. And within this range, in each base part arranged in at least any one of forms in which they are arranged linearly, arranged annularly, or arranged dispersedly, since the light emitting part of the first color and the light emitting part of the second color are adjacently arranged on the common mounting surface, it is possible to suppress one color or the other color from being too isolated at each base part arranged at each location, and both colors can be well mixed.

[0015] [3] In the accommodation part, a region in which a plurality of the light emitting parts of the first color are arranged and a region in which a plurality of the light emitting parts of the second color are arranged are alternately arranged. The lighting device according to [2].

[0016] In the lighting device described in [3] above, regions in which multiple light-emitting units of the first color are arranged and regions in which multiple light-emitting units of the second color are arranged alternately. This alternating arrangement further suppresses the appearance of color bias.

[0017] [4] Having a color tuning circuit for tuning the color of the light-emitting element, The holding portion comprises a thin base portion made of a sheet or plate that is configured to be flexible and deformable, The light-emitting element and the color tuning circuit are mounted on a common thin substrate portion. A lighting device as described in any one of [1] to [3].

[0018] The lighting device described in [4] above uses a flexible, thin base made of sheet material or plate material, which increases the freedom of layout when arranging the light-emitting elements and color tuning circuits. Furthermore, since this lighting device has both the light-emitting elements and color tuning circuits mounted on a common thin base and held within a housing, it is easier to reduce the number of parts and miniaturize the device compared to a configuration in which the light-emitting elements and color tuning circuits are mounted on separate bases.

[0019] [5] Having a color tuning circuit for tuning the color of the light-emitting element, The holding portion comprises a thin base portion made of a sheet or plate, At least a portion of the thin base portion is configured as a light-emitting element fixing portion to which a plurality of the light-emitting elements are fixed, The light-emitting element fixing portion is arranged in a ring shape so as to surround an arrangement space within the housing portion on which multiple light-emitting elements are fixed and on which at least a portion of the color tuning circuit is arranged. A lighting device as described in any one of [1] through [4].

[0020] The lighting device described in [5] above has a configuration in which multiple light-emitting elements are fixed to the outer surface of an annular light-emitting element fixing part, and these are arranged inside a housing part. Therefore, it is possible to configure the device to emit light of multiple colors from the outer surface of the annular light-emitting element fixing part toward the outside of the housing part. Furthermore, since the components of the color tuning circuit can be arranged inside the annular light-emitting element fixing part, the space inside the light-emitting element fixing part can be effectively utilized, and further miniaturization can be achieved.

[0021] [6] The light-transmitting portion has a cylindrical portion, The holding portion comprises a thin base portion made of a sheet or plate, At least a portion of the thin base portion is configured as a light-emitting element fixing portion to which a plurality of the light-emitting elements are fixed, The light-emitting element fixing portion has a curved outer surface that is arranged to curve along the inner surface of the cylindrical portion, Multiple light-emitting elements are arranged between the curved outer surface and the inner surface of the cylindrical portion, with each element facing the inner surface of the cylindrical portion. A lighting device as described in any one of [1] through [5].

[0022] The lighting device described in [6] above is configured such that the light-emitting element fixing part for holding the light-emitting element is curved and positioned close to the inner surface of the cylindrical light-transmitting section, thereby ensuring a larger surface area on the light-transmitting side of the light-emitting element fixing part, even in a narrow space within the housing. In this configuration, by arranging multiple light-emitting elements close together so that they face the inner surface of the cylindrical section on the light-transmitting side of the light-emitting element fixing part (the surface with a larger surface area as described above), a more compact configuration can be achieved that allows more light-emitting elements to be placed in the light-emitting element fixing part while each light-emitting element emits light outward. On the other hand, with this configuration, there is a concern that the scattering of different colors may be easily visible because each light-emitting element is close to the cylindrical section. However, since each light-emitting element has a basic configuration in which multiple colored light-emitting elements are arranged adjacent to each other, it is possible to suppress the emphasis of different colors separately.

[0023] [7] A first series section comprising a plurality of the light-emitting units of the first color connected in series, and a second series section comprising a plurality of the light-emitting units of the second color connected in series, The first series section has at least two first element array sections in which a plurality of the first color light-emitting sections are arranged in a predetermined direction, and the first folded wiring section is electrically connected to both ends of the two side-by-side first element array sections, and the two first element array sections and the first folded wiring section are connected in series. The second series section has at least two second element array sections in which a plurality of the second color light-emitting sections are arranged in a predetermined direction, and the second folded wiring section is electrically connected to both ends of the two parallel second element array sections, and the two second element array sections and the second folded wiring section are connected in series. The second folded structure is positioned outside the first folded structure so as not to intersect with it. A lighting device as described in any one of [1] through [6].

[0024] The lighting device described in [7] above arranges the light-emitting parts of one color in a U-shape in series, and the light-emitting parts of the other color in a U-shape in series outside that area, thereby allowing different colored light-emitting parts to be placed adjacent to each other at each base, while also creating a series current supply path for each color, and furthermore, it is possible to create a configuration in which the series paths for each color are less likely to intersect.

[0025] [8] A first series section comprising a plurality of the light-emitting units of the first color connected in series, and a second series section comprising a plurality of the light-emitting units of the second color connected in series, wherein the first series section and the second series section are connected in parallel. The first series section is provided with a resistor in series with respect to a plurality of light-emitting sections of the first color, for the purpose of making the magnitude of the current flowing through the first series section different from the magnitude of the current flowing through the second series section. A lighting device as described in any one of [1] through [7].

[0026] The lighting device described in [8] above can increase or decrease the ratio of the current flowing through the first series section to the current flowing through the second series section by increasing or decreasing the magnitude of the current flowing through the parallel section in which the first series section and the second series section are arranged in parallel, thereby increasing or decreasing the ratio and total amount of luminous flux emitted from the first color light-emitting section to the luminous flux emitted from the second color light-emitting section. In other words, this lighting device can adjust both the brightness and color temperature by increasing or decreasing the current to the parallel section.

[0027] <First Embodiment> The following description relates to the first embodiment. 1. Overview of Lighting Device 1 The lighting device 1 shown in Figure 1 is a device that emits light outwards. In the representative example described below, the lighting device 1 is configured as, for example, an LED light having an LED (Light Emitting Diode). The lighting device 1 is used by being attached to a mounting object 100, for example, as shown in Figure 2. In the example in Figure 2, the lighting device 1 is held by the mounting object 100 by being inserted into a mounting hole 104 provided in the mounting part 102 of the mounting object 100, and the light-emitting elements 4 emit light when power is supplied from the mounting object 100, and each light-emitting element 4 emits light.

[0028] As shown in Figure 1, the lighting device 1 comprises a light-emitting element 4, a holding part 30 for holding the light-emitting element 4, and a housing part 6 for housing the light-emitting element 4 and the holding part 30.

[0029] As shown in Figure 3, the multiple light-emitting elements 4 are fixed to the holding part 30, and the multiple light-emitting elements 4 and the holding part 30 are integrally configured. In the examples of Figures 1 and 3, the unit 2, which is an integral part of the multiple light-emitting elements 4 and the holding part 30, is configured in a longitudinal shape that extends in a predetermined direction.

[0030] Figure 4 is an unfolded view of the unit 2 shown in Figure 3, specifically an unfolded view of the cylindrical holding part 30 as shown in Figure 3, unfolded into a single sheet. As shown in Figure 4, the holding part 30 includes a thin base part 32 made of a sheet or plate. The holding part 30 may consist only of the thin base part 32, or some other member not shown may be attached to or integrated with the thin base part 32. In the examples of Figures 3 and 4, the thin base part 32 is a flexible sheet or plate material that can be bent or curved, and may be a sheet material made of, for example, a resin material, or may be configured as a known flexible substrate.

[0031] As shown in Figures 3 and 4, a portion of the thin base portion 32 is configured as a light-emitting element fixing portion 34 to which multiple light-emitting elements 4 are fixed. As shown in Figures 1 and 3, the light-emitting element fixing portion 34 comprises a cylindrical component 36 housed in a housing portion in a cylindrical shape, and a closing portion 38 housed in the housing portion in a manner that closes one end of the cylindrical component 36. The cylindrical component 36 is composed of a first component 36A and a second component 36B shown in Figure 4, which are arranged in a cylindrical shape. Specifically, the first component 36A is curved and arranged to constitute about half of the cylindrical body, and the second component 36B is curved and arranged to constitute about half of the cylindrical body, with one end 37A of the first component 36A and one end 38A of the second component 36B being close together, and the other end 37B of the first component 36A and the other end 38B of the second component 36B being close together to form a cylindrical shape.

[0032] The outer surface of the cylindrical component 36 is configured as a curved outer surface 36Z. As shown in Figure 1, the curved outer surface 36Z is positioned within the housing 6 in a curved state, and is the surface on which the light-emitting element 4 is fixed. The curved outer surface 36Z forms the outer circumferential surface of the cylindrical component 36 and, when housed within the housing 6, is positioned curved along the inner surface (inner circumferential surface) of the cylindrical component 50, which will be described later.

[0033] As shown in Figure 3, the multiple light-emitting elements 4 fixed to the light-emitting element fixing part 34 are held in the holding part 30 in an arrangement having multiple base parts 10 arranged in a straight line, in an annular arrangement, or in a dispersed arrangement. As shown in Figures 1 and 3, the multiple light-emitting elements 4 arranged in the cylindrical component part 36 are composed of multiple linear arrangement parts in which the multiple light-emitting elements 4 are arranged in a straight line in a predetermined direction, and the multiple light-emitting elements 4 are dispersed throughout the entire cylindrical component part 36. The multiple light-emitting elements 4 arranged in the closing part 38 are arranged in an annular arrangement.

[0034] As shown in Figure 3, the light-emitting element fixing section 34 is arranged in a ring shape within the housing section 6 so as to surround the arrangement space in which at least a part of the color tuning circuit 60, described later, is arranged. Specifically, the color tuning circuit fixing section 35 is arranged inside the cylindrical component section 36 in a configuration that is bent from the cylindrical component section 36, and the inside of the cylindrical component section 36 is the aforementioned arrangement space. The resistor section 64 and other electrical components, described later, are arranged inside the color tuning circuit fixing section 35.

[0035] As shown in Figures 5 and 6, each light-emitting element 4 includes a multi-color light-emitting section 20 and a base 10 configured as a base on which these light-emitting sections 20 are mounted. For example, it is configured as an LED chip having multiple color LEDs.

[0036] As shown in Figures 5 and 6, the base 10 has a predetermined thickness and is in the form of a small plate, and one side of the base 10 is the mounting surface 12. The mounting surface 12 on which the multiple color light-emitting units 20 are mounted is a base with a predetermined shape, and in the example of Figure 5, the mounting surface 12 is a surface with a square outer edge. The other side of the base 10 (the side opposite to the mounting surface 12) is the surface that is fixed to the light-emitting unit fixing part 34. The other side of the base 10 is fixed to the outer surface of the light-emitting unit fixing part 34 by an adhesive medium such as an adhesive or by other means.

[0037] The light-emitting section 20 is mounted on the mounting surface 12 of the base section 10 and emits light in response to the application of electricity. As shown in Figures 5 and 6, the multiple light-emitting sections 20 mounted on the base section include a first-color light-emitting section 21 and a second-color light-emitting section 22, and these first-color light-emitting sections 21 and second-color light-emitting sections 22 are mounted on a common mounting surface 12. As shown in Figures 3 and 4, sets 26 of first-color light-emitting sections 21 and second-color light-emitting sections 22 are arranged adjacently on the common mounting surface 12 of the base section 10, in a linear arrangement, a ring arrangement, and a dispersed arrangement. As shown in Figure 6, the first-color light-emitting section 21 has a light-emitting element 21A, which is configured as an LED element, mounted on the mounting surface 12, and this light-emitting element 21A is covered by a first-color covering section 21B. Light emitted from the light-emitting element 21A passes through the covering section 21B, causing light of the first color to be emitted. The second color light-emitting section 22 is configured such that a light-emitting element 22A, which is configured as an LED element, is mounted on the mounting surface 12, and this light-emitting element 22A is covered by a second color covering section 22B. The light emitted from the light-emitting element 22A passes through the covering section 22B, causing the second color light to be emitted.

[0038] As shown in Figure 1, the housing section 6 is the outer shell of the lighting device 1 and houses the light-emitting element 4 and the holding section 30. In the example in Figure 1, the housing section 6 is also a part that is integrally formed with the base 42. The housing section 6 mainly consists of a light-transmitting section 8 and a fixing section 46. The fixing section 46 is a part that forms part of the outer shell of the lighting device 1 and is the part to which the light-transmitting section 8 is fixed. The fixing section 46 is also a part that holds components (such as the holding section 30) that are housed in the housing section 6.

[0039] The light-transmitting portion 8 is a part that is light-transmitting and is positioned to cover the light-emitting body 4. The light-transmitting portion 8 is made of glass material, resin material, etc., and is configured as a transparent or translucent part. The light-transmitting portion 8 is configured to transmit light emitted from the light-emitting body 4. In the example in Figure 1, the light-transmitting portion 8 has a hollow cylindrical portion 50 and an end face portion 52 that closes one end of the cylindrical portion 50. In the example in Figure 1, the cylindrical portion 50 is configured as a cylinder extending in a predetermined direction. In the example in Figure 1, the curved outer surface 36Z is arranged to curve along the inner surface (inner circumferential surface) of the cylindrical portion 50, and a plurality of light-emitting bodies 4 fixed to the outer surface of the light-emitting body fixing portion 34 are arranged between the curved outer surface 36Z and the inner surface of the cylindrical portion 50, facing the inner surface of the cylindrical portion 50.

[0040] As shown in Figure 1, the base 42 has pins 44 that function as terminals and a pin holding portion 45 that holds the pins 44. In the example in Figure 2, the base 42 is inserted into the mounting hole 104 and used. The pin holding portion 45 is connected to the fixing portion 46 and is the part that holds the pins 44. The pins 44 included in the base 42 have a pair of conductive pins 44A and 44B. Pins 44A and 44B are electrically connected to contact the respective terminals of the external connection target. For example, one pin 44A in the base 42 is connected to one terminal of the external connection target, and the other pin 44B is connected to the other terminal of the external connection target. The lighting device 1 is energized to each light-emitting element 4 by power being supplied from the external connection target via pins 44A and 44B. The power supplied via the aforementioned terminals is, for example, AC power.

[0041] 2. Configuration of the color tuning circuit, etc. As shown in Figures 4 and 7, the lighting device 1 has a color tuning circuit 60 for tuning the color of the light-emitting elements 4. The color tuning circuit 60 comprises a first series section 61 in which a plurality of light-emitting elements 21 of a first color are connected in series, and a second series section 62 in which a plurality of light-emitting elements 22 of a second color are connected in series, with the first series section 61 and the second series section 62 connected in parallel. Furthermore, a resistor section 64 is provided in series with the plurality of light-emitting elements 21 of the first color in the first series section 61 to make the magnitude of the current flowing through the first series section 61 different from the magnitude of the current flowing through the second series section 62. In the configuration shown in Figure 7, the total combined resistance of the first series section 61 is greater than the total combined resistance of the second series section 62.

[0042] In this configuration, the current flowing from terminal 91 to terminal 92 is increased or decreased by adjusting the power supplied from an external source. As the current flowing from terminal 91 to terminal 92 increases, the voltage drop across the resistor 64 increases, and the ratio of the current flowing through the first series section 61 to the current flowing through the second series section 62 decreases. In other words, as the current flowing from terminal 91 to terminal 92 increases, the relative amount of light from the first color to the amount of light from the second color decreases, and the second color is emphasized more. With this configuration, color tuning is achieved by adjusting the current flowing from terminal 91 to terminal 92.

[0043] Figure 8 shows the circuit configuration of part of the first series section 61 and part of the circuit configuration of the second series section 62. As shown in Figure 8, in the first series section 61, all light-emitting sections 21 in a predetermined area are connected in series, and in the second series section 62, all light-emitting sections 22 in a predetermined area are connected in series.

[0044] As shown in Figure 9, within the housing section 6, regions AR1 in which multiple light-emitting units 21 of the first color are arranged and regions AR2 in which multiple light-emitting units 22 of the second color are arranged are arranged alternately. As shown in Figures 8 and 9, the first series section 61 has two or more first element array sections 71A in which multiple light-emitting units 21 of the first color are arranged in a predetermined direction. In the example in Figure 8, the first element array section 71A is arranged to form the second column from the right, and the first element array section 71A is arranged to form the third column from the right. Then, in the first folded structure in which the first folded wiring section 71B is electrically connected to each end of one side (the lower side in Figure 8) in a predetermined direction of the two first element array sections 71A arranged in this way, the two first element array sections 71A and the first folded wiring section 71B are connected in series.

[0045] As shown in Figures 8 and 9, the second series section 62 has two or more second element array sections 72A in which multiple light-emitting sections 22 of a second color are arranged in a predetermined direction. In the example in Figure 8, the second element array section 72A is arranged to form the rightmost column, and the second element array section 72A is arranged to form the fourth column from the right. Then, in the second folded wiring section 72B, the two second element array sections 72A and the second folded wiring section 72B are electrically connected to each end of one side in a predetermined direction (the lower side in Figure 8) of the two second element array sections 72A arranged in this parallel manner, and the two second element array sections 72A and the second folded wiring section 72B are connected in series. This second folded structure is arranged outside the first folded structure (the lower side in the example in Figure 8) so as not to intersect with the first folded structure.

[0046] 3. Examples of effects The lighting device 1 has a base 42 and a light-emitting element 4 housed in a housing 6. In this basic structure, the light-emitting element 4 is configured such that two or more light-emitting elements 20 are mounted on a base 10 having a mounting surface 12. Therefore, this lighting device 1 can compactly realize a configuration that enables color tuning near the common mounting surface 12, and the main parts that contribute to color tuning can be made smaller.

[0047] The lighting device 1 can arrange multiple combinations of a first color light-emitting unit 21 and a second color light-emitting unit 22 for achieving a color-tuning function in a configuration that covers a wider area. Within this range, in each base unit 10 arranged in a linear configuration, a ring configuration, or a dispersed configuration, the first color light-emitting unit 21 and the second color light-emitting unit 22 are arranged adjacent to each other on a common mounting surface 12. This prevents one color from becoming too isolated in each base unit 10 located at each location, and allows the two colors to blend well.

[0048] As shown in Figure 9, the lighting device 1 has alternating regions AR1, where multiple light-emitting units 21 of the first color are arranged, and AR2, where multiple light-emitting units 22 of the second color are arranged. This alternating arrangement further suppresses the appearance of color bias.

[0049] Since the lighting device 1 uses a flexible, thin base portion 32 made of sheet material or plate material, it is possible to increase the freedom of layout when arranging the light-emitting element 4 and the color tuning circuit 60. Furthermore, as shown in Figure 4, the lighting device 1 has a configuration in which both the light-emitting element 4 and the color tuning circuit 60 are mounted on a common thin base portion 32 and held in the housing portion 6, making it easier to reduce the number of parts and miniaturize the device compared to a configuration in which the light-emitting element 4 and the color tuning circuit 60 are mounted on separate base portions.

[0050] As shown in Figures 1 and 3, the lighting device 1 has a configuration in which multiple light-emitting elements 4 are fixed to the outer surface of an annular light-emitting element fixing part 34, and these are arranged inside a housing part 6. Therefore, it is possible to configure the lighting device 1 to emit light of multiple colors from the outer surface of the annular light-emitting element fixing part 34 toward the outside of the housing part 6. Furthermore, as shown in Figures 3 and 4, the components of the color tuning circuit 60 can be arranged inside the annular light-emitting element fixing part 34, so the space inside the light-emitting element fixing part 34 can be effectively utilized, and further miniaturization can be achieved.

[0051] The lighting device 1 is configured such that the light-emitting element fixing part 34 for holding the light-emitting element 4 is curved and positioned to conform to the inner surface of the cylindrical part 50, thereby increasing the surface area of ​​the light-transmitting side of the light-emitting element fixing part 34 (specifically, the surface area of ​​the curved outer surface 36Z in Figure 3) even in the narrow space within the housing part 6. Furthermore, in this configuration, by arranging multiple light-emitting elements 4 close together so that the light-transmitting side surface of the light-emitting element fixing part 34 (the surface with a larger surface area as described above) faces the inner surface of the cylindrical part 50, it is possible to arrange more light-emitting elements 4 in the light-emitting element fixing part 34 while irradiating light outward from each light-emitting part 20 (each light-emitting part 21 of the first color and each light-emitting part 22 of the second color) in a more compact configuration. This point can also be confirmed in the explanatory diagram of Figure 10. Figure 10 is an explanatory diagram that provides a simplified and conceptual explanation of the vicinity of the curved outer surface 36Z of the lighting device 1 according to the first embodiment. It is a simplified diagram showing a cross-section obtained by cutting the light-emitting element fixing part 34 and the light-emitting element 4, which are configured as a cylindrical body as shown in Figure 3, in a plane perpendicular to the longitudinal direction of the cylindrical body at a position where the light-emitting elements 4 are arranged in the circumferential direction. In the example of Figure 10, when the light-emitting element fixing part 34 and the light-emitting element 4 are housed in the housing part 6, the inner surface of the cylindrical part 50 will be located at the position of surface a. In this example of Figure 10, since the curved outer surface 36Z for arranging the light-emitting element 4 is curved to follow surface a (the inner surface of the cylindrical part 50 in the case of the cylindrical part 50), the distance from position Ya to position Yb is longer than the distance La from position Xa to position Xb on the virtual plane 140 when installed in a straight line, and the surface area of ​​the curved outer surface 36Z is larger than that of the virtual plane 140. Moreover, because the curvature along surface a (the inner surface of the cylindrical portion 50 in the case of the cylindrical portion 50) increases the surface area over the entire circumference, the surface area of ​​the curved outer surface 36Z becomes larger, and this surface area expansion effect becomes even greater as the arrangement of the curved outer surface 36Z gets closer to surface a (the inner surface of the cylindrical portion 50 in the case of the cylindrical portion 50). However, when the curved outer surface 36Z is arranged to be close to surface a (the inner surface of the cylindrical portion 50 in the case of the cylindrical portion 50), there is a concern that the scattered appearance of different colors will be easily visible because each light-emitting part 21 of the first color and each light-emitting part 22 of the second color are more likely to be close to the cylindrical portion 50.Such problems can occur even when the cylindrical portion 50 is transparent, but they become more pronounced when the cylindrical portion 50 is semi-transparent. In contrast, the lighting device 1 has a basic configuration in which multiple colored light-emitting parts (a first colored light-emitting part 21 and a second colored light-emitting part 22) are arranged adjacent to each other in each light-emitting element 4, so that different colors are not emphasized separately. For example, in the example in Figure 10, near surface a (the inner surface of the cylindrical portion 50), the light of the first color from the first colored light-emitting part 21 and the light of the second color from the second colored light-emitting part 22 will mix more, so that the light of each color will not be perceived in isolation. On the other hand, the comparative example in Figure 11 is an example in which a light-emitting unit 121 having the same configuration as the first color light-emitting unit 21 and a light-emitting unit 122 having the same configuration as the second color light-emitting unit 22 are each placed on separate base units 110, and these light-emitting units 104 are placed on a curved outer surface 136Z equivalent to the curved outer surface 36Z. In the comparative example in Figure 11, even though the size of the base units 110 is smaller and the spacing between adjacent base units 110 is narrower than in the configuration of Figure 10, at the position of surface a, there is less mixing of the light of the first color from the light-emitting unit 121 and the light of the second color from the light-emitting unit 122, and when viewed from the outside, the light-emitting units 121 and 122 appear more isolated. This problem is more likely to occur as the distance between the inner surface of the cylindrical unit 50 and the curved outer surface decreases, and in the examples of Figures 10 and 11, the problem is more likely to occur when the inner surface of the cylindrical unit 50 is at the position of surface a than when it is at the position of surface b. However, with a configuration like that shown in Figure 10 of this embodiment, such problems are less likely to occur.

[0052] As shown in Figure 9, the lighting device 1 arranges the light-emitting units 20 of one color in a U-shape in series, and the light-emitting units 20 of the other color in a U-shape in series outside that area. This allows for the arrangement of light-emitting units 20 of different colors adjacent to each other at each base 10, while also creating a series current supply path for each color. Furthermore, it is possible to create a configuration in which the series paths for each color are less likely to intersect.

[0053] As shown in Figure 7, the lighting device 1 can increase or decrease the ratio of the current flowing through the first series section 61 to the current flowing through the second series section 62 by increasing or decreasing the magnitude of the current to the parallel section in which the first series section 61 and the second series section 62 are provided in parallel. This allows the ratio and total amount of luminous flux of light emitted from the first color light-emitting section 21 to the luminous flux of light emitted from the second color light-emitting section 22 to be increased or decreased. In other words, the lighting device 1 can adjust both the brightness and color temperature by increasing or decreasing the current to the parallel section. For example, in this embodiment, if the first color is "incandescent color" and the second color is a different "warm incandescent color," increasing the ratio of the "magnitude of the current flowing through the first series section 61" to the "magnitude of the current flowing through the second series section 62" increases the ratio of the "luminous flux of light emitted from the first color light-emitting section 21" to the "luminous flux of light emitted from the second color light-emitting section 22," bringing the color tone of the light emitted from the entire lighting device 1 closer to "incandescent color." Conversely, increasing the ratio of the current flowing through the second series section 62 to the current flowing through the first series section 61 increases the ratio of the luminous flux emitted from the second color light-emitting section 22 to the luminous flux emitted from the first color light-emitting section 21, thereby bringing the color of the light emitted from the entire lighting device 1 closer to a "warm incandescent color." Here, the first color is defined as "incandescent color" and the second color as "warm incandescent color," but this example is not limited to this; any combination of different colors is acceptable.

[0054] <Other Embodiments> The present invention is not limited to the embodiments described above and in the drawings. For example, any combination of the features of the embodiments described above or below is possible as long as it does not contradict each other. Furthermore, any feature of the embodiments described above or below may be omitted unless explicitly stated as essential. In addition, the embodiments described above may be modified as follows.

[0055] In the example shown in Figure 4, a portion of the thin base is used as the light-emitting element fixing portion 34, and another portion is used as the color tuning circuit fixing portion 35. However, the color tuning circuit may be configured as a separate component from the thin base, and the entire thin base may be used as the light-emitting element fixing portion.

[0056] In the first embodiment, two light-emitting units 20 of two different colors are mounted on the base 10. However, three or more light-emitting units 20 may be mounted on a common mounting surface of the base, or three or more light-emitting units 20 of three different colors may be mounted on a common mounting surface of the base.

[0057] It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is not limited to the embodiments disclosed herein, and is intended to include all modifications within the scope set forth in the claims or equivalents thereof. [Explanation of symbols]

[0058] 1: Lighting device 4: Luminous body 6: Containment area 8: Light transmission part 10: Base 12: Implementation aspects 20: Light-emitting part 26: Group 30: Holding part 32:Thin base part 34: Light-emitting element fixing part 36: Cylindrical component 36Z: Curved outer surface 42: Nozzle 44: Pin 45: Pin holding part 46:Fixed part 50: Cylindrical part 60: Toning circuit 61: First series section 62: Second series section 64:Resistance section 71A: First element array section 71B: First folded wiring section 72A: Second element array section 72B: Second folded wiring section 100: Applicable to installation

Claims

1. A light-emitting body comprising a base portion having one side as a mounting surface, and a plurality of light-emitting parts mounted on the mounting surface, A holding part for holding the light-emitting element, A light-transmitting portion having light-transmitting properties and positioned to cover the light-emitting element, a fixing portion fixed to the light-transmitting portion, and a housing portion that houses the light-emitting element and the holding portion, The nozzle and It has, The light-emitting element is configured such that the light-emitting portion of the first color and the light-emitting portion of the second color are mounted on a common mounting surface. Lighting device.

2. Having a plurality of the aforementioned light-emitting elements, The multiple light-emitting elements are held in the holding portion in an arrangement having at least one of the following configurations: a linear arrangement of the multiple bases, an annular arrangement, or a dispersed arrangement. The set of the light-emitting parts of the first color and the light-emitting parts of the second color, which are arranged adjacent to each other on the common mounting surface of the base, is arranged in at least one of the following configurations: in a linear arrangement, in a ring arrangement, or in a dispersed arrangement. The lighting device according to claim 1.

3. Within the housing, regions in which multiple light-emitting units of the first color are arranged and regions in which multiple light-emitting units of the second color are arranged are arranged alternately. The lighting device according to claim 2.

4. The light-emitting element has a color adjustment circuit for adjusting its color, The holding portion comprises a thin base portion made of a sheet or plate that is configured to be flexible and deformable, The light-emitting element and the color tuning circuit are mounted on a common thin substrate portion. A lighting device according to any one of claims 1 to 3.

5. The light-emitting element has a color adjustment circuit for adjusting its color, The holding portion comprises a thin base portion made of a sheet or plate, At least a portion of the thin base portion is configured as a light-emitting element fixing portion to which a plurality of the light-emitting elements are fixed, The light-emitting element fixing portion is arranged in a ring shape so as to surround an arrangement space within the housing portion on which multiple light-emitting elements are fixed and on which at least a portion of the color tuning circuit is arranged. A lighting device according to any one of claims 1 to 3.

6. The light-transmitting portion has a cylindrical portion, The holding portion comprises a thin base portion made of a sheet or plate, At least a portion of the thin base portion is configured as a light-emitting element fixing portion to which a plurality of the light-emitting elements are fixed, The light-emitting element fixing portion has a curved outer surface that is arranged to curve along the inner surface of the cylindrical portion, Multiple light-emitting elements are arranged between the curved outer surface and the inner surface of the cylindrical portion, with each element facing the inner surface of the cylindrical portion. A lighting device according to any one of claims 1 to 3.

7. It comprises a first series section in which a plurality of the light-emitting units of the first color are connected in series, and a second series section in which a plurality of the light-emitting units of the second color are connected in series, The first series section has at least two first element array sections in which a plurality of the first color light-emitting sections are arranged in a predetermined direction, and the first folded wiring section is electrically connected to both ends of the two side-by-side first element array sections, and the two first element array sections and the first folded wiring section are connected in series. The second series section has at least two second element array sections in which a plurality of the second color light-emitting sections are arranged in a predetermined direction, and the second folded wiring section is electrically connected to both ends of the two parallel second element array sections, and the two second element array sections and the second folded wiring section are connected in series. The second folded structure is positioned outside the first folded structure so as not to intersect with it. A lighting device according to any one of claims 1 to 3.

8. The device comprises a first series section in which a plurality of the light-emitting units of the first color are connected in series, and a second series section in which a plurality of the light-emitting units of the second color are connected in series, wherein the first series section and the second series section are connected in parallel. The first series section is provided with a resistor in series with respect to a plurality of light-emitting sections of the first color, for the purpose of making the magnitude of the current flowing through the first series section different from the magnitude of the current flowing through the second series section. A lighting device according to any one of claims 1 to 3.

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