Lighting equipment

Abstract

The present invention provides a lighting device that suppresses enlargement and ensures high heat dissipation while ensuring a wide range of illumination light. The lighting device comprises: a plurality of element modules, each of which is provided with a mounting substrate formed in a shape having a length direction set as a first direction, a semiconductor light-emitting element mounted on the mounting substrate, and a fluorescent layer containing fluorescent bodies of different colors; a control module, which is provided with a control circuit and a wiring substrate formed in a shape having a length direction set as a second direction, the control circuit is formed on the wiring substrate to control the plurality of element modules; and a base plate, which is formed of a metal material and has a planar configuration surface, a plurality of element modules and a control module are configured on the configuration surface, the control module is electrically connected to the plurality of element modules, the plurality of element modules are arranged in a direction orthogonal to the first direction, and the control module is configured along the plurality of element modules in a state where the second direction is consistent with the direction orthogonal to the first direction.

Description

Technical Field

[0001] The present invention relates to a technical field related to a lighting device, in which a plurality of element modules each having a semiconductor light emitting element and a control module for controlling the plurality of element modules are arranged on a base plate. Background Art

[0002] There is a lighting device that uses a semiconductor light emitting element as a light source and converts the wavelength of light emitted from the semiconductor light emitting element by a fluorescent layer (light wavelength conversion layer) containing a fluorescent substance of a different color (for example, see Patent Document 1).

[0003] The lighting device described in Patent Document 1 is configured such that a semiconductor light emitting element that emits ultraviolet light or short-wavelength visible light and a fluorescent layer excited by the light emitted from the semiconductor light emitting element are arranged on a substrate. The fluorescent layer contains a blue fluorescent substance, a green fluorescent substance, a yellow fluorescent substance, and a red fluorescent substance dispersedly, and the fluorescent substance of each color is excited by the light emitted from the semiconductor light emitting element to emit light in a predetermined color.

[0004] The lighting device described above emits light of a color corresponding to the phosphors of different colors included in the fluorescent layer, and irradiates lighting light of a predetermined chromaticity toward the outside as a whole.

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-34179

[0006] In addition, the lighting device as described above is used in various environments corresponding to the purpose of use, usage conditions, etc., for example, it is used as an indoor lamp used in homes, buildings, etc., as a lighting lamp for products such as agricultural products and seafood, and as a work lamp used in various operations performed indoors and outdoors.

[0007] Since the lighting device is used in various environments as described above, there is also a lighting device constructed in the following manner, that is, using a plurality of element modules composed of semiconductor light emitting elements and fluorescent layers arranged on a substrate, so as to irradiate lighting light with high color rendering in a wide range according to each environment.

[0008] In addition, in a lighting device using a plurality of element modules, it is possible to irradiate light in a wide range according to the number of element modules. However, as the number of element modules increases, there is a possibility that the size of the device increases accordingly, and the amount of heat generated also increases. Summary of the invention

[0009] Therefore, an object of the lighting device of the present invention is to overcome the above-mentioned problems, to ensure a wide range of irradiation of illumination light, to suppress enlargement and to ensure high heat dissipation.

[0010] First, the lighting device involved in the present invention comprises: a plurality of element modules, each of which is provided with a mounting substrate formed in a shape having a length direction set as a first direction, a semiconductor light-emitting element mounted on the mounting substrate, and a fluorescent layer containing fluorescent bodies of different colors; a control module, which is provided with a control circuit and a wiring substrate formed in a shape having a length direction set as a second direction, the control circuit is formed on the wiring substrate to control the plurality of element modules; and a base plate, which is formed of a metal material and has a planar configuration surface, the plurality of element modules and the control module are configured on the configuration surface, the control module is electrically connected to the plurality of element modules, the plurality of element modules are arranged and configured in a direction orthogonal to the first direction, and the control module is configured along the plurality of element modules in a state where the second direction is consistent with a direction orthogonal to the first direction.

[0011] Thus, the plurality of element modules are arranged in the second direction on the arrangement surface of the base plate formed of metal material, and the control module is arranged along the plurality of element modules with the arrangement surface of the base plate formed of metal material being arranged in the second direction in the longitudinal direction.

[0012] Second, in the lighting device according to the present invention described above, it is preferred that the plurality of element modules include a first element module and a second element module having different color temperatures, and the first element module and the second element module are arranged in a predetermined arrangement order.

[0013] Thus, light having different color temperatures is emitted from the first element module and the second element module arranged in a predetermined arrangement order.

[0014] Thirdly, in the lighting device according to the present invention described above, it is preferable that the first element modules and the second element modules are arranged alternately.

[0015] Thus, light having different color temperatures is emitted from the first element modules and the second element modules that are alternately arranged.

[0016] Fourthly, in the lighting device involved in the above-mentioned present invention, it is preferred that a first control module and a second control module are provided as the control modules, the first control module forming the control circuit for controlling the first element module, the second control module forming the control circuit for controlling the second element module, the first control module being arranged along one end of the plurality of element modules in the first direction, and the second control module being arranged along the other end of the plurality of element modules in the first direction.

[0017] Thus, the first control module and the second control module are arranged along both ends of the first element module and the second element module, respectively.

[0018] Fifthly, in the lighting device according to the present invention described above, it is preferred that a box body is provided, the box body being opened in at least one direction and the base plate being mounted thereon, and the box body is formed of a metal material.

[0019] Thus, both the base plate and the case have high heat dissipation properties, and the heat generated when the element module and the control module are driven can be more conductively transferred from the base plate to the case.

[0020] Effects of the Invention

[0021] According to the present invention, a plurality of element modules are arranged in the second direction on a configuration surface of a base plate formed of a metal material, and a control module is arranged along the plurality of element modules on the configuration surface of a base plate formed of a metal material with the length direction being set to the second direction. Thus, it is possible to suppress enlargement while ensuring a wide range of irradiation of the illumination light, and to ensure high heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 and Figures 2 to 5 Together with the embodiments of the lighting device of the present invention, this figure is an exploded oblique view of the lighting device.

[0023] Figure 2 is a cross-sectional view of the lighting device.

[0024] Figure 3 This is an enlarged cross-sectional view showing a part of the element module and the like.

[0025] Figure 4 is a top view of the light source unit.

[0026] Figure 5 is a top view of other light source units.

[0027] Description of the label

[0028] 1… lighting device, 2… housing, 2a… internal space, 3… cover, 8… base plate, 8a… configuration surface, 9… element module, 10… control module, 11… mounting substrate, 11a… one end, 12… semiconductor light emitting element, 13… fluorescent layer, 13a… fluorescent body, 15… wiring substrate, 9A… first element module, 9B… second element module, 10A… first control module, 10B… second control module DETAILED DESCRIPTION

[0029] Hereinafter, a method for implementing the lighting device of the present invention will be described with reference to the accompanying drawings. In addition, in the lighting device shown below, a box having an internal space and a cover that closes the internal space of the box are provided. In the following description, the direction in which the box and the cover are arranged is regarded as the up-down direction, and the front-back, up-down, down-down, left-right directions are shown. However, the front-back, up-down, down-down, left-right directions shown below are used for the convenience of description, and the implementation of the present invention is not limited to these directions.

[0030] The lighting device 1 is used in various applications, for example, as an indoor lamp used in homes and buildings, a lighting lamp for producing products such as agricultural products and marine products, and a work lamp used for various operations performed indoors and outdoors.

[0031] The lighting device 1 comprises: a lamp frame 4, which is composed of a box body 2 and a cover 3; and a light source unit 5, which is arranged inside the lamp frame 4 (see Figure 1 ).

[0032] The housing 2 has a bottom portion 6 of a rectangular shape that faces the vertical direction, and a peripheral portion 7 that protrudes upward from the outer peripheral portion of the bottom portion 6. The housing 2 is formed of a metal material such as aluminum having high thermal conductivity. The housing 2 is formed of a metal material, thereby ensuring high rigidity and high heat dissipation. In particular, the housing 2 is formed of aluminum, thereby achieving lightweight while ensuring high heat dissipation.

[0033] A cable outlet hole (not shown) is formed in the box 2. The upper surface of the bottom portion 6 is formed as a mounting surface 6a, and the mounting surface 6a is formed in a flat shape. The box 2 is provided with a plurality of positioning pins (not shown) protruding upward from the mounting surface 6a.

[0034] The cover 3 is formed into a rectangular substantially flat plate shape by transparent materials such as glass and resin. A diffusion step for diffusing light may be formed on the cover 3. The cover 3 is mounted by bonding the outer periphery to the upper surface of the peripheral surface 7 or by screwing.

[0035] The cover 3 is attached to the housing 2 to form a lamp frame 4 , and an internal space 2 a of the housing 2 is closed by the cover 3 .

[0036] The light source unit 5 includes a base plate 8, element modules 9, 9, ..., and a control module 10 (see Figure 1 and Figure 2 ).

[0037] The base plate 8 is formed into a substantially rectangular flat plate shape from a metal material such as aluminum having high thermal conductivity. The base plate 8 is formed into a substantially rectangular shape, for example, with the length direction being the left-right direction, the width direction being the front-back direction, and the thickness direction being the up-down direction. The upper surface of the base plate 8 is formed into a planar configuration surface 8a.

[0038] A plurality of positioning holes (not shown) are formed in the base plate 8. The positioning holes are formed at least at both ends of the base plate 8 in the longitudinal direction.

[0039] The base plate 8 is formed of a metal material, thereby ensuring high rigidity and high heat dissipation. In particular, the base plate 8 is formed of aluminum, thereby ensuring high heat dissipation and achieving weight reduction.

[0040] The base plate 8 is positioned on the box body 2 by inserting positioning pins provided in the bottom surface 6 into the positioning holes, and is mounted on the mounting surface 6a of the box body 2 by a highly thermally conductive adhesive or adhesive sheet (not shown). Alternatively, the base plate 8 may be mounted on the box body 2 by heat caulking, screw fastening, or the like.

[0041] The element module 9 includes a rectangular mounting substrate 11, semiconductor light emitting elements 12, 12, ... mounted on the mounting substrate 11, and a fluorescent layer 13 containing fluorescent materials of different colors (see Figure 3 and Figure 4 ).

[0042] The mounting substrate 11 is formed into a rectangular shape with the longitudinal direction being the front-rear direction, the longitudinal direction of the mounting substrate 11 being the first direction, and the left-right direction, i.e., the width direction of the mounting substrate 11 being the second direction. The mounting substrate 11 is formed of, for example, ceramics having high thermal conductivity, and a conductive pattern (not shown) for energizing the semiconductor light emitting element 12 is formed on the upper surface. Terminal portions 14, 14 connected to the conductive pattern are formed at the end portion on the side of one end 11a in the longitudinal direction of the mounting substrate 11 and are separated and formed on the left and right.

[0043] The semiconductor light emitting elements 12, 12, ... function as light sources, and are arranged, for example, at equal intervals in the front and rear in the center portion in the left-right direction of the mounting substrate 11. A light emitting diode (LED) is used as the semiconductor light emitting element 12. Light having a wavelength range of, for example, 370 nm to 420 nm is emitted from the semiconductor light emitting element 12.

[0044] For example, a purple light emitting diode with low directivity is used as the semiconductor light emitting element 12. By using a purple light emitting diode with low directivity as the semiconductor light emitting element 12 as described above, it is less likely to have a problem of narrow irradiation range and easy color unevenness, such as the so-called blue YAG method in which a blue light emitting diode and a yellow phosphor (YAG phosphor) are combined, and the occurrence of color unevenness can be suppressed compared to the lighting device of the blue YAG method.

[0045] The fluorescent layer 13 functions as a wavelength conversion layer, and is composed of fluorescent bodies 13a, 13a, ... of different colors encapsulated by an encapsulation material 13b such as silicone. The fluorescent layer 13 is formed in a shape extending in the first direction, for example, so that the width thereof decreases as it goes upward.

[0046] As the phosphors 13a, 13a, ..., for example, a blue phosphor emitting fluorescence at 430nm to 490nm, a green phosphor emitting fluorescence at 500nm to 560nm, a yellow phosphor emitting fluorescence at 540nm to 600nm, and a red phosphor emitting fluorescence at 590nm to 700nm are used. The phosphors 13a, 13a, ... are packaged in a dispersed state by a packaging material 13b, and the phosphors 13a, 13a, ... of each color are excited by light emitted from the semiconductor light emitting elements 12, 12, ..., and emit light in a predetermined color. In addition, the semiconductor light emitting elements 12, 12, ... are also packaged by the packaging material 13b.

[0047] In addition, the fluorescent layer 13 may be formed as a single layer or a multilayer. In the case where the fluorescent layer 13 is a multilayer, for example, an inner layer for encapsulating the semiconductor light emitting element 12 and an outer layer located outside the inner layer are provided, and the fluorescent bodies of the blue fluorescent body, the green fluorescent body, the yellow fluorescent body, and the red fluorescent body may be distinguished and included in any of the inner layer and the outer layer. For example, the inner layer may contain at least a red fluorescent body, and the outer layer may contain at least a blue fluorescent body.

[0048] As described above, the red phosphor with an excitation spectrum on the long wavelength side is contained in the inner layer, and the blue phosphor with an excitation spectrum on the short wavelength side is contained in the outer layer. This suppresses the light excited in the outer layer from being reabsorbed in the inner layer, thereby suppressing color deviation and reducing the amount of light.

[0049] The element modules 9, 9, ... configured as described above are adjacently arranged at equal intervals, for example, on the arrangement surface 8a of the base plate 8 in the second direction orthogonal to the longitudinal direction as the first direction. In addition, the element modules 9, 9, ... may be arranged at unequal intervals in the second direction. The element modules 9, 9, ... are mounted on the arrangement surface 8a of the base plate 8 by an adhesive or adhesive sheet with high thermal conductivity (not shown).

[0050] When the element modules 9, 9,... are arranged on the arrangement surface 8a of the base plate 8, one ends 11a, 11a,... and the other ends 11b, 11b,... in the longitudinal direction of the mounting substrate 11 are respectively located at the same positions in the front-rear direction.

[0051] The control module 10 has a rectangular wiring substrate 15 (see FIG. Figure 2 and Figure 4 ). The control module 10 is arranged at one end in the width direction of the arrangement surface 8a of the base plate 8. A control circuit (not shown) for controlling the element modules 9, 9, ... is formed on the wiring substrate 15, and current is supplied to the element modules 9, 9, ... by the control circuit. Electrode terminals 10a, 10a are formed at one end in the length direction of the control module 10. The control module 10 is mounted on the arrangement surface 8a of the base plate 8 by an adhesive or adhesive sheet (not shown) with high thermal conductivity.

[0052] The control module 10 is arranged along one ends 11a, 11a, ... of the element modules 9, 9, .... Therefore, the intervals between the side edge 10b on one side in the width direction of the control module 10 and the one ends 11a, 11a, ... are the same. In addition, the side edge 10c on the other side in the width direction of the control module 10 is aligned with or close to the side edge 8b on one side in the width direction of the base plate 8.

[0053] As described above, the element modules 9, 9, ... are arranged in a second direction perpendicular to the longitudinal direction, and the control module 10 is arranged along the element modules 9, 9, ... in a state where the longitudinal direction coincides with the second direction, thereby enabling the element modules 9, 9, ... and the control module 10 to be arranged close to each other. Therefore, the arrangement space of the element modules 9, 9, ... and the control module 10 relative to the base plate 8 becomes smaller, and the light source unit 5 can be miniaturized.

[0054] The control module 10 and the terminal portions 14 , 14 , ... of the element modules 9 , 9 , ... are connected by metal wires 16 , 16 , ...

[0055] One end of the cables 50, 50 is connected to the electrode terminals 10a, 10a of the control module 10, and the cables 50, 50 are led out from the cable lead-out hole formed in the housing 2, and the other end is connected to a power supply circuit (not shown). Therefore, the semiconductor light emitting elements 12, 12, ... of the element module 9 are supplied with current from the power supply circuit via the cables 50, 50, the control module 10, and the wires 16, 16.

[0056] When current is supplied from the power circuit to the semiconductor light emitting element 12, the light emitted from the semiconductor light emitting element 12 excites the phosphors 13a, 13a, ... of each color to emit light of a specified color, and the light of the specified color temperature passes through the cover 3 and is irradiated toward the outside as illumination light.

[0057] As described above, regarding the lighting device 1, the element modules 9, 9,... and the control module 10 are arranged on the configuration surface 8a of the base plate 8 formed of a metal material, the control module 10 is electrically connected to the plurality of element modules 9, 9,..., respectively, the element modules 9, 9,... are arranged in a second direction orthogonal to the first direction which is the length direction, and the control module 10 is arranged along the element modules 9, 9,... with the length direction being consistent with the second direction.

[0058] Therefore, the element modules 9, 9,... are arranged in the second direction on the configuration surface 8a of the base plate 8 formed of a metal material, and the control module 10 is arranged along the element modules 9, 9,... on the configuration surface 8a of the base plate 8 formed of a metal material with the length direction set to the second direction. Therefore, it is possible to suppress the upsizing while ensuring a wide range of irradiation of the illumination light of the illumination device 1, and to ensure high heat dissipation.

[0059] In addition, the box 2 on which the base plate 8 is installed is formed of a metal material, so both the base plate 8 and the box 2 have high heat dissipation properties. The heat generated when the component modules 9, 9,... and the control module 10 are driven is more conductive from the base plate 8 to the box 2, thereby ensuring higher heat dissipation performance in the lighting device 1 and ensuring a good driving state of the component modules 9, 9,... and the control module 10.

[0060] In the above, an example of the light source unit 5 arranged inside the lamp frame 4 is shown. However, the light source unit 5A shown below may be arranged inside the lamp frame 4 instead of the light source unit 5 (see Figure 5 ).

[0061] In addition, the only difference between the light source unit 5A and the above-mentioned light source unit 5 is that there is a difference in the structure of the component module and that two control modules are provided. Therefore, only the parts that are different from the light source unit 5 are described in detail, and the other parts are marked with the same numbers as the same parts in the light source unit 5 and the description is omitted.

[0062] The light source unit 5A includes a base plate 8 , first element modules 9A, 9A, ..., second element modules 9B, 9B, ..., a first control module 10A, and a second control module 10B.

[0063] The first element module 9A and the second element module 9B are formed in the same shape and are set to have different color temperatures. The first element module 9A and the second element module 9B, for example, set the current value supplied to the semiconductor light emitting element 12 of the first element module 9A and the current value supplied to the semiconductor light emitting element 12 of the second element module 9B to different values, thereby making the color temperature different. The color temperature of the first element module 9A is set to, for example, about 3000K (absolute temperature scale), and the color temperature of the second element module 9B is set to, for example, about 5000K (absolute temperature scale).

[0064] However, the color temperatures of the first element module 9A and the second element module 9B are not limited to approximately 3000 K and approximately 5000 K, and can be set to any color temperature in consideration of light of a color required as illumination light.

[0065] The terminals 14 , 14 of the first element module 9A are formed at one end 11 a of the mounting substrate 11 in the longitudinal direction, and the terminals 14 , 14 of the second element module 9B are formed at the other end 11 b of the mounting substrate 11 in the longitudinal direction.

[0066] The first element modules 9A, 9A, ... and the second element modules 9B, 9B, ... configured as described above are alternately arranged adjacently at equal intervals on the arrangement surface 8a of the base plate 8 in the second direction orthogonal to the longitudinal direction as the first direction. That is, the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ... are arranged adjacently in a state of being arranged in order as the first element module 9A, the second element module 9B, the first element module 9A, the second element module 9B, ...

[0067] Furthermore, the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ... may be arranged at unequal intervals in the second direction.

[0068] In addition, the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ... may be arranged regularly instead of being arranged alternately one by one. For example, any of the following regular arrangement states may be used, i.e., two first element modules 9A, 9A and one second element module 9B are arranged alternately side by side, one first element module 9A and two second element modules 9B, 9B are arranged alternately side by side, three first element modules 9A, 9A, 9A and two second element modules 9B, 9B are arranged alternately side by side, etc.

[0069] Furthermore, as long as at least one first element module 9A and one second element module 9B are arranged, the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ... may be arranged in an irregular arrangement.

[0070] The first element modules 9A, 9A, ... and the second element modules 9B, 9B, ... are mounted on the arrangement surface 8 a of the base plate 8 by an adhesive or an adhesive sheet having high thermal conductivity (not shown).

[0071] When the first element modules 9A, 9A,... and the second element modules 9B, 9B,... are arranged on the arrangement surface 8a of the base plate 8, one end 11a, 11a,... and the other end 11b, 11b,... in the length direction of the mounting substrate 11 are respectively located at the same position in the front-to-back direction.

[0072] The first control module 10A is disposed at one end portion in the width direction of the arrangement surface 8 a of the base plate 8 , and the second control module 10B is disposed at the other end portion in the width direction of the arrangement surface 8 a of the base plate 8 .

[0073] A control circuit (not shown) for controlling the first element modules 9A, 9A, ... is formed on the wiring substrate 15 of the first control module 10A, and current is supplied to the first element modules 9A, 9A, ... by the control circuit. A control circuit (not shown) for controlling the second element modules 9B, 9B, ... is formed on the wiring substrate 15 of the second control module 10B, and current is supplied to the second element modules 9B, 9B, ... by the control circuit.

[0074] The first control module 10A is arranged along one ends 11a, 11a, ... of the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ..., and the second control module 10B is arranged along the other ends 11b, 11b, ... of the first element modules 9A, 9A, ... and the second element modules 9B, 9B, .... Therefore, the intervals between the side edge 10b of one side of the first control module 10A and the one ends 11a, 11a, ... are set to be the same, and the intervals between the side edge 10c of the other side of the second control module 10B and the other ends 11b, 11b, ... are set to be the same. The other side edge 10c of the first control module 10A is aligned with or close to one side edge 8b of the base plate 8 in the width direction, and the one side edge 10b of the second control module 10B is aligned with or close to the other side edge 8c of the base plate 8 in the width direction.

[0075] As described above, the first element modules 9A, 9A, ··· and the second element modules 9B, 9B, ··· are arranged in the second direction orthogonal to the length direction, and the first control module 10A and the second control module 10B are arranged along the first element modules 9A, 9A, ··· and the second element modules 9B, 9B, ··· in a state where the length direction coincides with the second direction, thereby enabling the first element modules 9A, 9A, ···, the second element modules 9B, 9B, ···, the first control module 10A and the second control module 10B to be arranged close to each other. Therefore, the arrangement space of the first element modules 9A, 9A, ···, the second element modules 9B, 9B, ···, the first control module 10A and the second control module 10B relative to the base plate 8 becomes smaller, and the light source unit 5A can be miniaturized.

[0076] The terminal parts 14, 14, ... of the first control module 10A and the first element modules 9A, 9A, ... are connected by metal wires 16, 16, ..., and the terminal parts 14, 14, ... of the second control module 10B and the second element modules 9B, 9B, ... are connected by metal wires 16, 16, ....

[0077] When current is supplied from the power supply circuit to the semiconductor light emitting element 12 of the first element module 9A, the phosphors 13a, 13a, ... of each color are excited by the light emitted from the semiconductor light emitting element 12 to emit light in a predetermined color, and light of a set color temperature is emitted from the first element module 9A. Simultaneously, when current is supplied from the power supply circuit to the semiconductor light emitting element 12 of the second element module 9B, the phosphors 13a, 13a, ... of each color are excited by the light emitted from the semiconductor light emitting element 12 to emit light in a predetermined color, and light set to a color temperature different from that of the first element module 9A is emitted from the second element module 9B.

[0078] When the light source unit 5A is used as described above, light having different color temperatures is emitted from the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ..., and the color-adjusted light is transmitted through the cover 3 and irradiated toward the outside as illumination light.

[0079] As described above, regarding the lighting device 1 using the light source unit 5A, the first element modules 9A, 9A,..., the second element modules 9B, 9B,..., the first control module 10A and the second control module 10B are arranged on the configuration surface 8a of the base plate 8 formed of a metal material, the first control module 10A is electrically connected to multiple first element modules 9A, 9A,..., the second control module 10B is electrically connected to multiple second element modules 9B, 9B,..., the first element modules 9A, 9A,... and the second element modules 9B, 9B,... are arranged in a second direction orthogonal to the first direction, and the first control module 10A and the second control module 10B are arranged along the first element modules 9A, 9A,... and the second element modules 9B, 9B,... with the length direction being consistent with the second direction.

[0080] Therefore, the first element modules 9A, 9A, ··· and the second element modules 9B, 9B, ··· are arranged in the second direction on the configuration surface 8a of the base plate 8 formed of a metal material, and the first control module 10A and the second control module 10B are arranged along the first element modules 9A, 9A, ··· and the second element modules 9B, 9B, ··· on the configuration surface 8a of the base plate 8 formed of a metal material with the length direction set to the second direction. Therefore, it is possible to suppress the enlargement while ensuring a wide range of irradiation of the illumination light of the lighting device 1, and to ensure high heat dissipation.

[0081] In addition, in the light source unit 5A, first element modules 9A, 9A, ... and second element modules 9B, 9B, ... having different color temperatures are arranged in a predetermined arrangement order.

[0082] Therefore, since light having different color temperatures is emitted from the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ..., it is possible to perform illumination with light of a desired color with reduced color unevenness and to perform illumination with a wide range of chromaticity.

[0083] Furthermore, the first element modules 9A, 9A, ··· and the second element modules 9B, 9B, ··· are alternately arranged, whereby lights of different color temperatures are emitted from the alternately arranged first element modules 9A, 9A, ··· and the second element modules 9B, 9B, ···, respectively, so that lighting can be performed with light of a desired color that further reduces color unevenness, and lighting can be performed under a wide range of chromaticity.

[0084] In particular, the color temperature of the light emitted from the first element module 9A, 9A,... and the second element module 9B, 9B,... is different. Therefore, by adjusting the color temperature of the two, light of the desired color from warm colors to daytime white colors in the white area can be irradiated from the lighting device 1, and the color temperature of the light emitted from the first element module 9A, 9A,... and the second element module 9B, 9B,... can be controlled to ensure high color rendering properties corresponding to the purpose of use, usage conditions, etc.

[0085] Furthermore, the first control module 10A is configured along one ends 11a, 11a, ... of the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ..., and the second control module 10B is configured along the other ends 11b, 11b, ... of the first element modules 9A, 9A, ... and the second element modules 9B, 9B, ....

[0086] Therefore, the first control module 10A and the second control module 10B are respectively arranged along the two ends of the first element modules 9A, 9A,... and the second element modules 9B, 9B,..., so that the configuration space of the first element modules 9A, 9A,..., the second element modules 9B, 9B,..., the first control module 10A and the second control module 10B relative to the base plate 8 can be reduced, thereby enabling further miniaturization of the lighting device 1.

[0087] On this basis, the box 2 on which the base plate 8 is installed is formed of a metal material, so that both the base plate 8 and the box 2 have high heat dissipation properties. The heat generated when the first element module 9A, 9A,..., the second element module 9B, 9B,..., the first control module 10A and the second control module 10B are driven becomes more conductive from the base plate 8 to the box 2, thereby ensuring higher heat dissipation performance in the lighting device 1 and ensuring a good driving state of the first element module 9A, 9A,..., the second element module 9B, 9B,..., the first control module 10A and the second control module 10B.

[0088] In addition, in the above, an example is shown in which the color temperature is made different by setting the current value supplied to the semiconductor light emitting element 12 of the first element module 9A and the current value supplied to the semiconductor light emitting element 12 of the second element module 9B to different values, but for example, the color temperature can also be made different in the first element module 9A and the second element module 9B by the difference in the content ratio of the fluorescent body 13a, 13a,... of each color in the fluorescent layer 13.

[0089] That is, the content ratios of the blue phosphor, the green phosphor, the yellow phosphor, and the red phosphor can be made different in the fluorescent layer 13 of the first element module 9A and the fluorescent layer 13 of the second element module 9B, so that the color temperature can be made different in the first element module 9A and the second element module 9B. By making the color temperature different in the first element module 9A and the second element module 9B by the difference in the content ratio as described above, the color temperature of light can be controlled regardless of the magnitude of the current supplied to the semiconductor light emitting element 12 of the first element module 9A and the semiconductor light emitting element 12 of the second element module 9B, and the degree of freedom related to the control of the color temperature can be improved with a simple structure.

[0090] In the above description, an example is shown in which two first element modules 9A and second element modules 9B having different color temperatures are provided in the light source unit 5A. However, three or more element modules having different color temperatures may be provided in the light source unit 5A.

[0091] By using a light source unit having three or more element modules with different color temperatures, higher color rendering properties can be achieved.

[0092] Furthermore, in the above, an example is shown in which the first control module 10A having a control circuit for controlling the first element modules 9A, 9A, ... and the second control module 10B having a control circuit for controlling the second element modules 9B, 9B, ... are provided in the light source unit 5A, but only one control module may be provided in the light source unit 5A. In this case, the control circuit for controlling the first element modules 9A, 9A, ... and the control circuit for controlling the second element modules 9B, 9B, ... are formed in one control module, and the one control module is arranged at one end or the other end in the first direction of the base plate 8.

[0093] As described above, by using only one control module in the light source unit 5A, the arrangement space of the light source unit 5A with respect to the base plate 8 is reduced, and the lighting device 1 can be miniaturized while ensuring high color rendering performance.

[0094] However, by adopting a configuration in which the first control module 10A and the second control module 10B are provided, the heat generated in the light source unit 5A is dispersed, and good heat dissipation performance can be ensured in the lighting device 1 .

Claims

1. A lighting device, comprising: a plurality of element modules, each of which is provided with a mounting substrate formed in a shape having a length direction set as a first direction, a semiconductor light emitting element mounted on the mounting substrate, and a fluorescent layer containing fluorescent bodies of different colors; a control module including a control circuit and a wiring substrate formed in a shape having a length direction set as a second direction, wherein the control circuit is formed on the wiring substrate and controls the plurality of element modules; as well as a base plate formed of a metal material and having a planar configuration surface on which the plurality of element modules and the control module are configured, The control module is connected to one end of a cable that supplies current. The control module is electrically connected to the plurality of component modules respectively. The plurality of element modules are arranged in a direction perpendicular to the first direction. The control module is arranged along the plurality of element modules in a state where the second direction coincides with a direction orthogonal to the first direction. The plurality of element modules are composed of a first element module and a second element module having different color temperatures. The first element module and the second element module are arranged in a predetermined sequence. The control module includes a first control module and a second control module, wherein the first control module includes the control circuit for controlling the first element module, and the second control module includes the control circuit for controlling the second element module. The first control module is arranged along one end of the plurality of element modules in the first direction. The second control module is arranged along the other end of the plurality of element modules in the first direction.

2. The lighting device according to claim 1, wherein: The first element modules and the second element modules are arranged alternately.

3. The lighting device according to claim 1 or 2, wherein: A box body is provided, the box body is opened at least on one side, and the base plate is mounted thereon, and the box body is formed of a metal material.

Images