JP2018092810A - Light emitting device and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device facilitating power supply to other light emitting devices.SOLUTION: A light emitting device 10 includes: a substrate 11 having a structure where a first wiring layer 16a and a second wiring layer 16b are laminated across an insulation layer 17; a pair of power source wirings 13 which are a pair of power source wirings 13 running parallel to a first direction and transmit AC power to a second terminal structure from a first terminal structure; a plurality of circuit elements 15 composing a power supply circuit; and an LED element 14 emitting light using electric power output by the power supply circuit. A first power supply wiring 13a of the pair of power supply wirings 13 is formed as a part of the first wiring layer 16a, and a second power supply wiring 13b of the pair of power supply wirings 13 is formed as a part of the second wiring layer 16b.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a light emitting device and a lighting device using the same.

  In recent years, lighting devices using LEDs (Light Emitting Diodes) are rapidly spreading. As an example of such an illuminating device, Patent Document 1 discloses a long luminaire including a long casing and an LED module arranged in the casing.

JP 2012-84367 A

  In a lighting device including a plurality of light emitting devices such as the LED module and a lighting device having a structure to which a light emitting device can be added, there is a problem in a method of feeding power to the plurality of light emitting devices.

  The present invention provides a light-emitting device that can easily supply power to another light-emitting device or the like, and a lighting device using the light-emitting device.

  A light-emitting device according to one embodiment of the present invention includes a substrate having a structure in which a first wiring layer and a second wiring layer are stacked with an insulating layer interposed therebetween, and one end portion in the first direction of the substrate. A first terminal structure; a second terminal structure disposed at the other end of the substrate in the first direction; and a pair of power supply wires running in parallel in the first direction, wherein the first terminal structure A pair of power supply wirings for transmitting supplied AC power to the second terminal structure, and a plurality of circuit elements arranged on the substrate, wherein the AC power acquired through the pair of power supply wirings A plurality of circuit elements constituting a circuit for conversion and output, and a light emitting element disposed on the substrate that emits light using the power output by the circuit, and one power source of the pair of power supply wirings Wiring is formed as part of the first wiring layer Are, the other power supply lines of the pair of power supply wiring is formed as a part of the second wiring layer.

  An illumination device according to one embodiment of the present invention includes the light-emitting device and a housing that houses the light-emitting device.

  According to the present invention, a light-emitting device that can easily supply power to another light-emitting device and the like, and an illumination device using the light-emitting device are realized.

FIG. 1 is a perspective view illustrating an appearance of a lighting apparatus according to an embodiment. FIG. 2 is an exploded perspective view of the lighting apparatus according to the embodiment. FIG. 3 is a plan view of the light emitting device according to the embodiment. 4 is a schematic cross-sectional view of a substrate included in the light-emitting device according to the embodiment (a cross-sectional view of the light-emitting device according to the embodiment taken along line IV-IV in FIG. 3). FIG. 5 is a schematic cross-sectional view of the light-emitting device according to the embodiment in a cross-section different from that of FIG. FIG. 6 is a schematic cross-sectional view of a light emitting device according to a modification.

  Hereinafter, embodiments will be described with reference to the drawings. Each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a mimetic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to substantially the same structure, and the overlapping description may be abbreviate | omitted or simplified. In the following embodiments, “substantially” or “about” means that a manufacturing error, a dimensional tolerance, and the like are included.

  In the drawings used for explanation in the following embodiments, coordinate axes may be shown. The Z-axis + side may be expressed as an upper side (upper), and the Z-axis-side may be expressed as a lower side (lower). The X-axis direction and the Y-axis direction are directions perpendicular to each other on a plane perpendicular to the Z-axis direction. The Y-axis direction is the longitudinal direction of the lighting device, the lighting fixture, and the light emitting device. The X-axis direction is a short direction of the lighting device, the lighting fixture, and the light emitting device. In the following embodiments, the plan view means viewing from the Z-axis direction (viewing from a direction perpendicular to the main surface of the substrate included in the light emitting device). In other words, the Z-axis direction is the stacking direction.

(Embodiment)
[Lighting device]
First, a lighting device according to an embodiment will be described with reference to FIGS. FIG. 1 is a perspective view illustrating an appearance of a lighting apparatus according to an embodiment. FIG. 2 is an exploded perspective view of the lighting apparatus according to the embodiment.

  The illumination device 1 according to the embodiment shown in FIGS. 1 and 2 is a thin and long illumination device (slim line illumination) as a whole, and emits line-shaped illumination light. The overall shape of the illumination device 1 is a flat, substantially rectangular parallelepiped, but the overall shape of the illumination device 1 is not limited to a flat, substantially rectangular parallelepiped.

  The lighting device 1 is installed, for example, in a living room or bedroom of a house and used as indirect lighting such as cove lighting or cornice lighting. Moreover, the illuminating device 1 is installed in a kitchen etc. and used as kitchen lighting etc., for example. In addition, the illuminating device 1 may be used not as indirect lighting but as main lighting such as a base light installed on a ceiling or the like.

  Specifically, the lighting device 1 includes a lighting fixture 2, a mounting member 3, and a power cable unit 5 for supplying AC power to the lighting fixture 2.

  The luminaire 2 is attached to a construction material such as a ceiling or a wall by an attachment member 3. The attachment member 3 is disposed on the side surface on the X axis side of the two side surfaces along the longitudinal direction of the housing 40. The mounting member 3 is a long mounting bracket made of a metal material such as an aluminum alloy, for example. The total length of the attachment member 3 is substantially the same as that of the lighting fixture 2 (housing 40).

  When the luminaire 2 is installed on the construction material, first, the mounting member 3 is fixed to the construction material with screws 4 (shown in FIG. 2). Next, the nail | claw part 3a is latched by the groove part 2a by hooking the groove part 2a of the lighting fixture 2 on the nail | claw part 3a of the attachment member 3 fixed to the construction material. The claw portion 3a has, for example, a T-shaped cross section and fits into the groove portion 2a.

  The lighting fixture 2 receives AC power supplied through the power cable unit 5 and emits light. The power cable unit 5 is connected to a male power supply terminal 61 a disposed on an end cover 60 a located at one end (Y-axis-side end) in the longitudinal direction of the lighting fixture 2. The power cable unit 5 includes a main body portion 6 including a female terminal portion 6a corresponding to the male power supply terminal 61a, a power plug 7, and a power cable 8 that electrically connects the main body portion 6 and the power plug 7. .

  When the power plug 7 is inserted into an outlet (not shown), the power cable unit 5 supplies AC power obtained through the outlet to the lighting fixture 2. The AC power is specifically sine wave AC power supplied from the power system, and the frequency of the sine wave AC power is, for example, 50 Hz or 60 Hz. The power cable unit 5 may have a male terminal portion corresponding to the female power supply terminal 61b and be connected to the female power supply terminal 61b.

  In addition, the female power supply terminal 61b disposed on the end cover 60b located at the other end (Y-axis + side end) in the longitudinal direction of the luminaire 2 has a male power supply terminal of the other luminaire 2. 61a can be connected. That is, the user can extend the length of the lighting device 1 by connecting a plurality of lighting fixtures 2 along the longitudinal direction. In this case, the power supply to the other lighting fixtures 2 is performed by the one lighting fixture 2 to which the power cable unit 5 is connected. That is, one lighting fixture 2 supplies (distributes) the AC power supplied from the power cable unit 5 to the one lighting fixture 2 to another lighting fixture 2 connected to the other lighting fixture 2. Can do.

  The lighting device 1 (lighting fixture 2) has, for example, a height of about 15 mm, a width of about 35 mm, and a total length of about 30 cm. If a plurality of lighting fixtures 2 are connected, the total length of the lighting device 1 will be 60 cm, 90 cm ··, depending on the number of lighting fixtures 2.

  The lighting fixture 2 mainly includes a light emitting device 10, a housing 40, an end cover 60a, and an end cover 60b. Hereinafter, each component of the lighting fixture 2 is demonstrated.

[Light emitting device]
First, the light emitting device 10 will be described with reference to FIG. 3 in addition to FIGS. FIG. 3 is a plan view of the light emitting device 10.

  The light emitting device 10 is a light emitting module that functions as a light source of the lighting device 1. The light emitting device 10 is a light emitting device having an SMD (Surface Mount Device) structure, and includes an SMD type light emitting element (LED element 14) as described later. The light emitting device 10 includes a substrate 11, a first terminal structure 12a, a second terminal structure 12b, a plurality of LED elements 14, and a plurality of circuit elements 15. Note that the light emitting device 10 may include at least one LED element 14.

[Substrate included in the light emitting device]
The substrate 11 is a long plate material that extends along the longitudinal direction (Y-axis direction) of the lighting fixture 2. The planar view shape of the substrate 11 is a long rectangular shape. For example, the substrate 11 has a long side length of about 29 cm and a short side length of about 15 cm, but the length of the long side and the short side is not limited to such a length. Moreover, the planar view shape of the board | substrate 11 is not limited to a rectangle. The planar view shape of the substrate 11 may be, for example, a curved shape. Moreover, the board | substrate 11 does not need to be elongate.

  The substrate 11 is accommodated in the housing 40. Specifically, the substrate 11 is fixed in the casing 40 by being slid into a groove 43 included in the casing 40. Although one substrate 11 is disposed in the housing 40, a plurality of substrates 11 may be disposed in the housing 40 according to the length of the housing 40 in the longitudinal direction.

  The substrate 11 is, for example, a CEM-3 (Composite Epoxy Material-3) substrate based on a resin material, but may be other resin substrates, or a metal base substrate or ceramic based on a metal material. It may be a ceramic substrate based on the material. Examples of other resin substrates include FR-4 (Frame Regentant-4) substrates. Examples of the ceramic substrate include an alumina substrate made of aluminum oxide (alumina) and an aluminum nitride substrate made of aluminum nitride. Further, examples of the metal base substrate include an aluminum alloy substrate, an iron alloy substrate, and a copper alloy substrate.

  Further, the substrate 11 is not limited to a rigid substrate. The substrate 11 may be a flexible substrate whose base material is polyimide or the like.

  On the upper surface (one main surface) of the substrate 11, a first terminal structure 12a, a second terminal structure 12b, a plurality of LED elements 14, and a plurality of circuit elements 15 are arranged.

  The substrate 11 has a structure in which a first wiring layer and a second wiring layer are stacked with an insulating layer interposed therebetween. 4 is a schematic cross-sectional view of the light-emitting device 10 (cross-sectional view of the light-emitting device 10 taken along the line IV-IV in FIG. 3).

  As shown in FIG. 4, the substrate 11 included in the light emitting device 10 includes a first wiring layer 16a, a second wiring layer 16b, an insulating layer 17, a cover resist 18a, and a cover resist 18b.

  The insulating layer 17 is located between the first wiring layer 16a and the second wiring layer 16b in the stacking direction. The insulating layer 17 is formed of the above-described base material (resin material, metal material, ceramic material, or the like).

  The first wiring layer 16 a is a metal layer formed on the upper surface of the insulating layer 17. The first wiring layer 16a includes, for example, a first power supply wiring 13a, a wiring pattern 13c that electrically connects the plurality of circuit elements 15, and a wiring pattern 13d that electrically connects the plurality of LED elements 14. It is. The first wiring layer 16a is formed of a metal material such as copper, for example.

  The first wiring layer 16a is covered with a cover resist 18a except for a portion that needs to be exposed. The cover resist 18a is made of an insulating material.

  The second wiring layer 16 b is a metal layer formed on the lower surface of the insulating layer 17. The second wiring layer 16b includes, for example, a second power supply wiring 13b and a heat radiation wiring pattern 13e. The second wiring layer 16b is formed of a metal material such as copper, for example.

  The second wiring layer 16b is covered with a cover resist 18b except for a portion that needs to be exposed. The cover resist 18b is formed of an insulating material.

  The first power supply wiring 13 a and the second power supply wiring 13 b constitute a pair of power supply wirings 13. The pair of power supply wirings 13 are wiring patterns that run in parallel in the longitudinal direction (Y-axis direction) of the substrate 11. The pair of power supply wires 13 are wires for outputting the AC power supplied to the first terminal structure 12a as it is from the second terminal structure 12b, and are electrically connected to the first terminal structure 12a and the second terminal structure 12b. Is done.

  The first power supply wiring 13a is one of the pair of power supply wirings 13 and is formed as a part of the first wiring layer 16a. The first power supply wiring 13 a extends along the longitudinal direction of the substrate 11 from one end portion (Y-axis-side end portion) of the substrate 11 to the other end portion (Y-axis + -side end portion) of the substrate 11. Extend. One end of the first power supply wiring 13a is exposed from the cover resist 18a and is connected to the first terminal structure 12a. The other end of the first power supply wiring 13a is exposed from the cover resist 18b and is connected to the second terminal structure 12b.

  For example, the first power supply wiring 13a is composed of only a straight portion along the longitudinal direction of the substrate 11, but may be partially curved or bent. The first power supply wiring 13a is, for example, a power supply wiring corresponding to the N phase (neutral phase), but may be a power supply wiring corresponding to the L phase (live phase). Note that the power supply wiring corresponding to the N phase may be grounded.

  The first power supply wiring 13a is not connected to a wiring or a circuit element in the middle except for a branch wiring 13f (shown by a broken line in FIG. 3) for supplying AC power to a plurality of circuit elements 15. In some cases, a protective element such as is disposed on the way.

  The second power supply wiring 13b is the other power supply wiring of the pair of power supply wirings 13, and is formed as a part of the second wiring layer 16b. The second power supply wiring 13 b extends from one end of the substrate 11 to the other end of the substrate 11 along the longitudinal direction of the substrate 11. One end of the second power supply wiring 13 b is connected to the first terminal structure 12 a disposed on the upper surface of the substrate 11 by a conductive via structure 13 g (shown in FIG. 3) that penetrates the insulating layer 17. The other end of the second power supply wiring 13 b is connected to the second terminal structure 12 b disposed on the upper surface of the substrate 11 by a conductive via structure 13 h (shown in FIG. 3) that penetrates the insulating layer 17.

  For example, the second power supply wiring 13b includes only a straight portion along the longitudinal direction of the substrate 11, but may be partially curved or bent. For example, the second power supply wiring 13b is a power supply wiring corresponding to the L phase, but may be a power supply wiring corresponding to the N phase. Note that the power supply wiring corresponding to the N phase may be grounded.

  The second power supply wiring 13b is formed in the second wiring layer 16b, except for branch wiring (not shown) for supplying AC power to the plurality of circuit elements 15, and a wiring or circuit element in the middle. Is not connected.

  According to such a pair of power supply wirings 13 (first power supply wiring 13a and second power supply wiring 13b), one end (first terminal structure 12a) of the substrate 11 to the other end (second terminal structure 12b). ) Can transmit AC power. Therefore, when a plurality of lighting fixtures 2 are connected, it becomes easy to supply (distribute) AC power from the light emitting device 10 of one lighting fixture 2 to the light emitting devices 10 of other lighting fixtures 2. Further, even when a plurality of light emitting devices 10 are arranged in the longitudinal direction in one housing 40, the pair of power supply wirings 13 can exchange AC power from one light emitting device 10 to another light emitting device 10. Can be easily supplied (distributed).

  As shown in FIG. 5, the heat radiation wiring pattern 13e included in the second wiring layer 16b is used for contact with the conductive via structure 13i penetrating the insulating layer 17 and the components included in the first wiring layer 16a. The LED element 14 and a part of the plurality of circuit elements 15 are connected via the wiring pattern 13j. FIG. 5 is a schematic cross-sectional view of the light-emitting device 10 in a cross-section different from that of FIG. According to such a heat radiation wiring pattern 13e, the heat dissipation of the LED element 14 and the plurality of circuit elements 15 can be enhanced.

[LED elements included in the light emitting device]
The LED element 14 is an SMD type light emitting element and emits white light. The LED element 14 includes a package having a recess, an LED chip mounted on the bottom surface of the recess of the package, and a sealing member that fills the recess of the package and seals the LED chip. The LED chip is, for example, a blue LED chip that emits blue light, and the sealing member is, for example, a silicone resin containing yttrium, aluminum, garnet (YAG) -based yellow phosphor particles as a wavelength conversion material. Further, the LED element 14 has a metal terminal for mounting the LED element 14 on the substrate 11.

  The plurality of LED elements 14 are arranged in a straight line along the longitudinal direction of the substrate 11 on the upper surface of the substrate 11, and constitute a light emitting element array 14a. In plan view, the light emitting element row 14 a is located at the end of the substrate 11 on the X axis + side. The plurality of LED elements 14 may be arranged in a curved line. The plurality of LED elements 14 are arranged at regular intervals, for example.

  The plurality of LED elements 14 are connected in series by a wiring pattern 13d (shown in FIG. 4) included in the first wiring layer 16a. The electrical connection mode of the plurality of LED elements 14 (series connection, parallel connection, combination connection of series connection and parallel connection, etc.) is not particularly limited.

[Terminal structure of light emitting device]
The first terminal structure 12 a is a pair of connectors that are arranged on one end (Y-axis-side end) in the longitudinal direction on the substrate 11 and are electrically connected to the pair of power supply wires 13. One connector is constituted by, for example, a metal terminal and a housing. The first terminal structure 12a is electrically connected to the male power supply terminal 61a by a pair of lead wires 70a. Thereby, the male power supply terminal 61a and the pair of power supply wirings 13 are electrically connected. AC power is supplied to the first terminal structure 12a from the male power supply terminal 61a (power cable unit 5).

  The specific aspect of the first terminal structure 12a is not particularly limited. For example, the first terminal structure 12a may be realized as one connector having two lead wire insertion holes corresponding to the pair of lead wires 70a. The first terminal structure 12a may be a terminal structure other than the connector. The first terminal structure 12a may be disposed on the lower surface (the other main surface) of the substrate 11.

  The second terminal structure 12 b is a pair of connectors that are disposed on the other end portion (Y-axis + side end portion) in the longitudinal direction on the substrate 11 and are electrically connected to the pair of power supply wirings 13. The second terminal structure 12b is electrically connected to the female power supply terminal 61b by a pair of lead wires 70b. Thereby, the female power supply terminal 61b and the pair of power supply wirings 13 are electrically connected. The second terminal structure 12b is a terminal structure for outputting the AC power supplied to the first terminal structure 12a to the outside of the light emitting device 10 (for example, another light emitting device 10).

  The specific aspect of the 2nd terminal structure 12b is not specifically limited, For example, you may implement | achieve as one connector which has two lead wire penetration holes corresponding to a pair of lead wire 70b. The second terminal structure 12b may be a terminal structure other than the connector. The second terminal structure 12b may be disposed on the lower surface (the other main surface) of the substrate 11.

  The first terminal structure 12a, the second terminal structure 12b, and the first power supply wiring 13a (or the second power supply wiring 13b) are arranged side by side (linearly) along the longitudinal direction in plan view. However, the positions of the first terminal structure 12a and the second terminal structure 12b in the short direction may be shifted from the first power supply wiring 13a (or the second power supply wiring 13b).

[Plural circuit elements included in light-emitting device]
The plurality of circuit elements 15 are arranged on the substrate 11 and are electrically connected by a wiring pattern 13c (shown in FIG. 4) included in the first wiring layer 16a, thereby forming a power supply circuit (lighting circuit). . The power supply circuit converts AC power acquired via the pair of power supply wirings 13 into power suitable for light emission of the plurality of LED elements 14, and outputs the converted power to the plurality of LED elements 14. That is, the LED element 14 emits light using the power output by the power supply circuit. Note that some or all of the plurality of circuit elements 15 may be disposed on the lower surface of the substrate 11.

  The power supply circuit is, for example, a constant current type power supply circuit. More specifically, the power supply circuit is, for example, an AC (Alternating Current) direct power supply circuit. The power supply circuit is, for example, AC power supplied to the first terminal structure 12a and branched from the first power supply wiring 13a (shown by a broken line in FIG. 3) and from the second power supply wiring 13b. AC power acquired through the branched wiring (not shown) is converted into DC power (pulsating power).

  The AC direct power supply circuit performs control to cause more LED elements 14 to emit light as the DC voltage (pulsating voltage) is higher. That is, the power supply circuit includes a switching circuit that changes the number of LED elements that emit light. The switching circuit includes a switching element such as a field effect transistor (FET), for example, and changes the number of LED elements that emit light by controlling on and off of the switching element.

  The plurality of circuit elements 15 include, for example, a rectifying element that rectifies an AC voltage and converts it into a DC voltage, and the plurality of LED elements 14 emit light according to the DC voltage. That is, the AC power after being converted by the power supply circuit is, for example, DC power (pulsating power).

  The plurality of circuit elements 15 include, for example, capacitive elements such as electrolytic capacitors or ceramic capacitors, resistance elements such as resistors, rectifier elements, fuses, noise filters, diodes, and semiconductor elements such as integrated circuit elements. .

  Note that circuit elements other than the plurality of circuit elements 15 constituting the power supply circuit may be disposed on the substrate 11. For example, on the substrate 11, the control circuit element or the lighting fixture 2 for controlling the light emission state (light control state, color adjustment state, etc.) of the plurality of LED elements 14 communicates with other devices. The communication circuit element or the like may be arranged.

[Case]
The casing 40 is an outer casing that forms an outer casing of the lighting fixture 2. The housing 40 has a substantially rectangular tube shape, and houses the light emitting device 10 therein. Specifically, the housing 40 covers a first housing 41 that covers a region of the substrate 11 where the pair of power supply wirings 13 are formed, and a light emitting element array 14a (a plurality of LED elements 14) on the substrate 11. It is comprised by two members with the 2nd housing | casing 42. FIG. The first housing 41 and the second housing 42 are fixed to each other by a locking structure, an adhesive, a screw, or the like.

  The first housing 41 is made of a material that does not have translucency. For example, the first housing 41 is formed of a resin material such as polycarbonate, but may be formed of a metal material such as aluminum or iron.

  The first housing 41 has a groove 43. The groove portion 43 is a portion for holding the light emitting device 10 and extends in the longitudinal direction of the housing 40. The light emitting device 10 (substrate 11) is slid into the groove 43. That is, the groove 43 holds the light emitting device 10 so as to be slidable.

  The 2nd housing | casing 42 is a translucent cover which permeate | transmits the light radiate | emitted from the light emitting element row | line | column 14a. The second housing 42 is entirely formed of a translucent material. For example, the second housing 42 is formed of a light-transmitting resin material such as acrylic or polycarbonate, but may be formed of a light-transmitting material such as a glass material.

  The second housing 42 may further have a light diffusing property (light scattering property). By giving the second casing 42 light diffusibility, light from the highly directional LED element 14 can be scattered, so that the feeling of collapse due to the difference in brightness of the light emission of the plurality of LED elements 14 (luminance unevenness). Can be suppressed. Examples of a method for imparting light diffusibility to the second housing 42 include a method of dispersing a light diffusing material in a light transmissive resin material, a method of forming a light diffusing film on the surface of the light transmissive resin material, and the like. Is exemplified.

[End cover]
The end cover 60 a is an end cap that covers one end of the housing 40 in the longitudinal direction. For example, a metal male power supply terminal 61a is disposed on the end cover 60a. The male power supply terminal 61a has a shape and a size corresponding to the female power supply terminal 61b. The male power supply terminal 61a included in one lighting fixture 2 has a female power supply terminal 61b included in another lighting fixture 2. Connectable.

  The end cover 60 b is an end cap that covers the other end in the longitudinal direction of the housing 40. For example, a metal female power supply terminal 61b is disposed on the end cover 60b. The female power supply terminal 61b has a shape and size corresponding to the male power supply terminal 61a, and the female power supply terminal 61b included in one lighting fixture 2 has a male power supply terminal 61a included in another lighting fixture 2. Connectable.

  The end cover 60a and the end cover 60b are fixed to the housing 40 by, for example, an adhesive, a screw, or a claw structure. The end cover 60a and the end cover 60b are made of a resin material such as polybutylene terephthalate, but may be made of a metal material.

[Placement of a pair of power supply wiring]
Next, the arrangement of the pair of power supply wirings in the light emitting device 10 will be described with reference to FIGS. The first power supply wiring 13a and the second power supply wiring 13b need to be arranged with an insulation distance secured. Therefore, for example, when both the first power supply wiring 13a and the second power supply wiring 13b are formed as a part of the first wiring layer 16a, the first power supply wiring 13a and the second power supply wiring 13b are short of the substrate 11. It is necessary to dispose a predetermined distance in the hand direction (X-axis direction). Then, there exists a subject that the light-emitting device 10 will become large in the width direction (X-axis direction).

  On the other hand, in the light emitting device 10, the first power supply wiring 13 a and the second power supply wiring 13 b are arranged in different wiring layers with the insulating layer 17 interposed therebetween, so that the light emitting device 10 becomes larger in the width direction. Can be suppressed. The insulating distance between the first power supply wiring 13 a and the second power supply wiring 13 b is ensured by the insulating layer 17.

  Moreover, since a pair of power supply wiring 13 is used for transmission of alternating current power, it is necessary to ensure an insulation distance from other components. Therefore, in plan view, each of the first power supply wiring 13a and the second power supply wiring 13b is located at an end portion of the substrate 11 in the X-axis direction intersecting (orthogonal) with the Y-axis direction. Specifically, each of the first power supply wiring 13a and the second power supply wiring 13b is located at an end portion on the X axis − side of the substrate 11 in a plan view.

  As a result, no component is disposed at a position closer to the X-axis than the pair of power supply wirings 13 on the substrate 11, so that it is not necessary to secure an insulation distance closer to the X-axis than the pair of power supply wirings 13. In other words, it is not necessary to secure an insulation distance on both sides of the pair of power supply wirings 13 in the X-axis direction. Therefore, the width of the light emitting device 10 can be shortened. That is, the light emitting device 10 can be reduced in size. In addition, if the pair of power supply wirings 13 are arranged at the end on the X-axis side of the substrate 11, the influence of noise generated from the pair of power supply wirings 13 on the light emitting element array 14 a and the plurality of circuit elements 15 is also suppressed. it can.

  In plan view, the plurality of circuit elements 15 constituting the power supply circuit are positioned between the pair of power supply wirings 13 and the light emitting element rows 14a (the plurality of LED elements 14) in the X-axis direction.

  As a result, the pair of power supply wirings 13, the plurality of circuit elements 15, and the light emitting element array 14a are arranged corresponding to the flow of electric power, so that the wiring pattern (wiring routing) on the substrate 11 can be simplified.

[Modification]
The substrate 11 may be, for example, a multilayer substrate having a structure in which four or more wiring layers are stacked. In this case, the pair of power supply wirings 13 may be arranged on the inner layer side. Hereinafter, a light emitting device according to such a modification will be described. FIG. 6 is a schematic cross-sectional view of a light emitting device according to a modification. In the following description of the modified example, the description will be focused on parts different from the above embodiment.

  A substrate 11a included in the light emitting device 10a illustrated in FIG. 6 includes four wiring layers stacked with an insulating layer interposed therebetween. That is, the substrate 11a has a structure in which four wiring layers are stacked.

  Specifically, in the substrate 11a, the second wiring layer 16b is stacked above the fourth wiring layer 16d with the insulating layer 17b interposed therebetween, and the first wiring is sandwiched above the second wiring layer 16b. Layer 16a is laminated. A third wiring layer 16c is laminated above the first wiring layer 16a with an insulating layer 17a interposed therebetween. The third wiring layer 16c is covered with the cover resist 18a except for portions that need to be exposed. The fourth wiring layer 16d is covered with a cover resist 18b except for a portion that needs to be exposed.

  The first wiring layer 16a, the second wiring layer 16b, the third wiring layer 16c, and the fourth wiring layer 16d are formed of a metal material such as copper, for example. The insulating layer 17, the insulating layer 17a, and the insulating layer 17b are formed of a base material (such as a resin material, a metal material, or a ceramic material) of the substrate 11a. The cover resist 18a and the cover resist 18b are formed of an insulating material.

  The first wiring layer 16a and the second wiring layer 16b are two wiring layers located on the inner layer side (inner side in the stacking direction) among the four wiring layers included in the substrate 11a. The first power supply wiring 13a is formed as a part of the first wiring layer 16a, and the second power supply wiring 13b is formed as a part of the second wiring layer 16b.

  Thus, by arranging the first power supply wiring 13a and the second power supply wiring 13b on the inner layer side, it is possible to reduce the influence of noise generated in the pair of power supply wirings 13 on the outside.

  Further, if the insulation distance from the pair of power supply wirings 13 (first power supply wiring 13a) to the third wiring layer 16c is secured by the insulating layer 17a, the degree of freedom of the arrangement of the wiring pattern in the third wiring layer 16c is improved. The In the substrate 11a, the third wiring layer 16c includes a wiring pattern 13c that electrically connects the plurality of circuit elements 15, a wiring pattern 13d that electrically connects the plurality of LED elements 14, and the like. In addition, the degree of freedom of arrangement of the wiring pattern 13d is improved.

  Further, when the wiring pattern 13c and the wiring pattern 13d and the first power supply wiring 13a are formed in different wiring layers, the wiring pattern 13c and the wiring pattern 13d and the first power supply wiring 13a are formed in the same wiring layer. Compared to the above, the area required for the arrangement of the wiring pattern in one wiring layer is reduced. For this reason, the magnitude | size of the board | substrate 11a in planar view can also be made small.

  Similarly, if the insulating distance from the pair of power supply wirings 13 (second power supply wiring 13b) to the fourth wiring layer 16d is ensured by the insulating layer 17b, the degree of freedom of the arrangement of wiring patterns in the fourth wiring layer 16d is improved. Is done. In the substrate 11a, a heat radiation wiring pattern 13m is arranged on the fourth wiring layer 16d. If the insulation distance from the pair of power supply wirings 13 (second power supply wiring 13b) to the fourth wiring layer 16d is secured by the insulating layer 17b, the heat dissipation wiring from the pair of power supply wirings 13 (second power supply wiring 13b) It is not necessary to consider the insulation distance up to the pattern 13m. For this reason, the wiring pattern 13m for heat dissipation can be formed large, and the heat dissipation of the light-emitting device 10a is thereby improved.

  Although not shown in detail, when a cross section different from the cross section shown in FIG. 6 is seen, the heat dissipating wiring pattern 13m has a conductive via structure similar to the heat dissipating wiring pattern 13e shown in FIG. And, for example, the LED element 14 is connected by a wiring pattern for contact.

  The insulating layer 17 sandwiched between the first wiring layer 16a and the second wiring layer 16b is, in other words, a core layer. The thickness of the insulating layer 17 is the thickest among the insulating layers (the insulating layer 17, the insulating layer 17a, and the insulating layer 17b) included in the substrate 11a.

  Thereby, the effect that it is easy to ensure the insulation distance of the 1st power supply wiring 13a and the 2nd power supply wiring 13b is acquired.

  Further, as shown in FIG. 6, the first wiring layer 16a may include other wiring patterns such as the ground wiring pattern 13k in addition to the first power supply wiring 13a. Similarly, the second wiring layer 16b may include other wiring patterns such as a heat radiation wiring pattern 13l in addition to the second power supply wiring 13b. Although not shown in detail, when a cross section different from the cross section shown in FIG. 6 is seen, the heat dissipating wiring pattern 13l has a conductive via structure similar to the heat dissipating wiring pattern 13e shown in FIG. For example, the circuit element 15 is connected by a wiring pattern for contact.

[Effects]
As described above, the light emitting device 10 includes the substrate 11 having a structure in which the first wiring layer 16a and the second wiring layer 16b are stacked with the insulating layer 17 interposed therebetween, and one end portion of the substrate 11 in the first direction. And a second terminal structure 12b disposed at the other end of the substrate 11 in the first direction. The light emitting device 10 is a pair of power supply wirings 13 that run in parallel in the first direction, and a pair of power supply wirings 13 for transmitting AC power supplied to the first terminal structure 12a to the second terminal structure 12b. A plurality of circuit elements 15 arranged on the substrate 11, and a plurality of circuit elements 15 constituting a power supply circuit that converts and outputs the AC power acquired via the pair of power supply wirings 13, and is output by the power supply circuit. A light emitting element disposed on the substrate that emits light using the generated electric power. The first power supply wiring 13 a that is one of the pair of power supply wirings 13 is formed as a part of the first wiring layer 16 a, and the second power supply wiring 13 b that is the other power supply wiring of the pair of power supply wirings 13. Is formed as a part of the second wiring layer 16b. The LED element 14 is an example of a light emitting element. The first direction is the Y-axis direction in the above embodiment.

  Such a light emitting device 10 can transmit AC power from one end of the substrate 11 to the other end by a pair of power supply wires 13. For this reason, in the illuminating device 1 in which the several light-emitting device 10 can be connected along a 1st direction, supply of the alternating current power to each light-emitting device 10 becomes easy.

  Further, like the light emitting device 10a, the substrate 11a includes four wiring layers (a first wiring layer 16a, a second wiring layer 16b, a third wiring layer 16c, and a fourth wiring layer stacked with an insulating layer interposed therebetween). A wiring layer 16d) may also be included. The first wiring layer 16a and the second wiring layer 16b may be two wiring layers located on the inner layer side of the four wiring layers.

  Thereby, the external influence of the noise which arises in a pair of power supply wiring 13 can be reduced.

  The thickness of the insulating layer 17 sandwiched between the first wiring layer 16a and the second wiring layer 16b may be the thickest among the insulating layers included in the substrate 11a.

  Thereby, the effect that it is easy to ensure the insulation distance of the 1st power supply wiring 13a and the 2nd power supply wiring 13b is acquired.

  Further, in a plan view, the pair of power supply wirings 13 may be located at the end of the substrate 11 in the second direction that intersects the first direction.

  As a result, no components are arranged on the end side of the substrate 11 with respect to the pair of power supply wirings 13 on the substrate 11, so that an insulation distance (insulation space) is ensured on the end side of the substrate 11 with respect to the pair of power supply wirings 13. There is no need to do. Therefore, the width of the substrate 11 can be shortened. That is, the substrate 11 can be reduced in size.

  The light emitting device 10 may include a plurality of LED elements 14. The plurality of LED elements 14 may be arranged on the substrate 11 side by side in the first direction.

  Thereby, the light-emitting device 10 can emit line-shaped light along the first direction.

  Further, in the plan view, the plurality of circuit elements 15 may be positioned between the pair of power supply wires and the plurality of LED elements 14.

  Thereby, since a pair of power supply wiring 13, the some circuit element 15, and the some LED element 14 are arrange | positioned corresponding to the flow of electric power, the wiring pattern (wiring routing) in the board | substrate 11 can be simplified.

  Moreover, the board | substrate 11 may be elongate which makes a 1st direction a longitudinal direction.

  Thereby, the light-emitting device 10 can be applied to the long illuminating device 1.

  The lighting device 1 includes a light emitting device 10 and a housing 40 that houses the light emitting device 10.

  Thereby, in the illuminating device 1, when the light-emitting device 10 (lighting fixture 2) can be added, supply of the alternating current power to the added light-emitting device 10 (lighting fixture 2) becomes easy.

(Other embodiments)
Although the embodiment has been described above, the present invention is not limited to such an embodiment.

  For example, in the above embodiment, the power supply circuit is an AC direct power supply circuit, but the specific form of the power supply circuit is not particularly limited. For example, the power supply circuit may be a power supply circuit including a switching power supply including a coil element such as a choke coil or a transformer.

  In the above embodiment, the light emitting device is a light emitting device having an SMD structure, but may be a light emitting device having a COB (Chip On Board) structure. In a light emitting device having a COB structure, an LED chip is used as a light emitting element, the LED chip is directly mounted on a substrate, and the LED chip is sealed with a translucent resin material containing phosphor particles. The light emitting device may be a remote phosphor type light emitting device having an LED chip and a resin member including phosphor particles arranged at a position away from the LED chip.

  The light emitting element is not limited to an LED chip or an element using the LED chip. For example, a solid-state light emitting element other than the LED chip, such as a semiconductor laser or an organic EL (Electro Luminescence), may be used as the light emitting element.

  In addition, one or a plurality of modes may be used in the present embodiment in which various modifications conceived by those skilled in the art have been made in this embodiment, or in a configuration constructed by combining components in different embodiments, without departing from the spirit of the present invention. It may be included in the range.

DESCRIPTION OF SYMBOLS 1 Illuminating device 10, 10a Light-emitting device 11, 11a Board | substrate 12a 1st terminal structure 12b 2nd terminal structure 13 A pair of power supply wiring 13a 1st power supply wiring (one power supply wiring)
13b Second power supply wiring (the other power supply wiring)
14 LED elements (light emitting elements)
DESCRIPTION OF SYMBOLS 15 Circuit element 16a 1st wiring layer 16b 2nd wiring layer 17, 17a, 17b Insulating layer 40 Case

Claims (8)

A substrate having a structure in which a first wiring layer and a second wiring layer are stacked with an insulating layer interposed therebetween;
A first terminal structure disposed at one end of the substrate in the first direction;
A second terminal structure disposed at the other end in the first direction of the substrate;
A pair of power supply wires running in parallel in the first direction, a pair of power supply wires for transmitting AC power supplied to the first terminal structure to the second terminal structure;
A plurality of circuit elements arranged on the substrate, the plurality of circuit elements constituting a circuit for converting and outputting the AC power obtained through the pair of power supply wirings;
A light emitting element disposed on the substrate that emits light using the power output by the circuit;
One power supply wiring of the pair of power supply wirings is formed as a part of the first wiring layer,
The other power supply line of the pair of power supply lines is formed as a part of the second wiring layer. The substrate includes four wiring layers stacked with an insulating layer therebetween,
The light emitting device according to claim 1, wherein the first wiring layer and the second wiring layer are two wiring layers positioned on an inner layer side of the four wiring layers. The light emitting device according to claim 2, wherein a thickness of an insulating layer sandwiched between the first wiring layer and the second wiring layer is the thickest among the insulating layers included in the substrate. 3. The light-emitting device according to claim 1, wherein the pair of power supply wirings are located at an end portion of the substrate in a second direction intersecting the first direction in a plan view. The light emitting device includes a plurality of the light emitting elements,
The light emitting device according to claim 4, wherein the plurality of light emitting elements are arranged on the substrate side by side in the first direction. The light emitting device according to claim 5, wherein the plurality of circuit elements are positioned between the pair of power supply wirings and the plurality of light emitting elements in a plan view. The light emitting device according to claim 1, wherein the substrate has a long shape with the first direction as a longitudinal direction. A light emitting device according to any one of claims 1 to 7,
A lighting device comprising: a housing that houses the light emitting device.

Images