JP6823804B2 - Light emitting device and lighting device - Google Patents

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) have rapidly become widespread. As an example of such a lighting device, Patent Document 1 discloses a long-shaped lighting fixture including a long-shaped housing and an LED module arranged in the housing.

Japanese Unexamined Patent Publication No. 2012-84367

In a lighting device having 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 supplying power to the plurality of light emitting devices.

The present invention provides a light emitting device that can easily supply power to other light emitting devices and the like, and a lighting device using the same.

The light emitting device according to one aspect of the present invention includes a substrate including a wiring layer, a first terminal structure arranged at one end of the substrate in the first direction, and the other end of the substrate in the first direction. A second terminal structure arranged in the portion and a pair of power supply wirings formed as a part of the wiring layer and running in parallel in the first direction, and the AC power supplied to the first terminal structure is supplied. A pair of power supply wirings for transmission to the second terminal structure and a plurality of circuit elements arranged on the substrate, which are circuits that convert and output the AC power acquired through the pair of power supply wirings. A plurality of circuit elements constituting the above, and a light emitting element arranged on the substrate, which emits light by using the power output by the circuit, are provided.

The lighting device according to one aspect of the present invention includes the light emitting device and a housing for accommodating the light emitting device.

According to the present invention, 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 are realized.

FIG. 1 is a perspective view showing the appearance of the lighting device according to the embodiment. FIG. 2 is an exploded perspective view of the lighting device according to the embodiment. FIG. 3 is a plan view of the light emitting device according to the embodiment. FIG. 4 is a schematic cross-sectional view of a substrate included in the light emitting device according to the embodiment (cross-sectional view of the light emitting device according to the embodiment cut along the line IV-IV of FIG. 3).

Hereinafter, embodiments will be described with reference to the drawings. Each of the embodiments described below provides a comprehensive or specific example. Numerical values, shapes, materials, components, arrangement positions of components, connection forms, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

Further, each figure is a schematic view and is not necessarily exactly shown. Further, in each figure, substantially the same configuration may be designated by the same reference numerals, and duplicate description may be omitted or simplified. Further, in the following embodiments, "abbreviation" or "about" means that a manufacturing error, a dimensional tolerance, or the like is included.

In addition, coordinate axes may be shown in the drawings used for explanation in the following embodiments. The Z-axis + side may be expressed as an upper side (upper side), and the Z-axis − side may be expressed as a lower side (lower side). Further, the X-axis direction and the Y-axis direction are directions orthogonal to each other on a plane perpendicular to the Z-axis direction. The Y-axis direction is the longitudinal direction of the luminaire, the luminaire, and the light emitting device. The X-axis direction is the lateral direction of the luminaire, the luminaire, 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).

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

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

The lighting device 1 is installed in, for example, a living room or a bedroom of a house, and is used as indirect lighting such as cove lighting or cornice lighting. Further, the lighting device 1 is installed in a kitchen or the like and is used as kitchen lighting or the like. The lighting 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 luminaire 1 includes a luminaire 2, a mounting member 3, and a power cable unit 5 for supplying AC power to the luminaire 2.

The luminaire 2 is attached to a construction material such as a ceiling or a wall by an attachment member 3. The mounting member 3 is arranged 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. The total length of the mounting 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 by a screw 4 (shown in FIG. 2). Next, the claw portion 3a is hooked on the groove portion 2a by hooking the groove portion 2a of the lighting fixture 2 on the claw portion 3a of the mounting 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.

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

When the power plug 7 is plugged into an outlet (not shown), the power cable unit 5 supplies the luminaire 2 with AC power obtained through the outlet. Specifically, the AC power is a sinusoidal AC power supplied from the power system, and the frequency of the sinusoidal AC power is, for example, 50 Hz or 60 Hz. The power cable unit 5 has a male terminal portion corresponding to the female power supply terminal 61b, and may be connected to the female power supply terminal 61b.

Further, the female power supply terminal 61b arranged 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 another luminaire 2. 61a can be connected. That is, the user can extend the length of the luminaire 1 by connecting a plurality of luminaires 2 along the longitudinal direction. In this case, power is supplied to the other luminaire 2 by one luminaire 2 to which the power cable unit 5 is connected. That is, one luminaire 2 supplies (distributes) the AC power supplied from the power cable unit 5 to the one luminaire 2 to the other luminaire 2 connected to the other luminaire 2. Can be done.

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 luminaires 2 are connected, the total length of the luminaire 1 becomes 60 cm, 90 cm, and so on, depending on the number of luminaires 2.

The luminaire 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 will be described.

[Light emitting device]
First, the light emitting device 10 will be described with reference to FIG. 3 in addition to FIGS. 1 and 2. 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 has 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. The light emitting device 10 may include at least one LED element 14.

[Substrate provided in the light emitting device]
The substrate 11 is a long plate material long along the longitudinal direction (Y-axis direction) of the luminaire 2. The plan view shape of the substrate 11 is an elongated rectangle. The substrate 11 has, for example, a long side length of about 29 cm and a short side length of about 15 cm, but the lengths of the long side and the short side are not limited to such lengths. Further, the plan view shape of the substrate 11 is not limited to a rectangle. The plan view shape of the substrate 11 may be, for example, a curved shape or the like. Further, the substrate 11 does not have to be long.

The substrate 11 is housed in the housing 40. Specifically, the substrate 11 is fixed in the housing 40 by being slid-inserted into the groove 43 of the housing 40. Although one substrate 11 is arranged in the housing 40, a plurality of boards 11 may be arranged in the housing 40 depending on the length of the housing 40 in the longitudinal direction.

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

Further, the substrate 11 is not limited to the rigid substrate. The substrate 11 may be a flexible substrate based on polyimide or the like.

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 on the upper surface (one main surface) of the substrate 11.

Further, the substrate 11 has a wiring layer. FIG. 4 is a schematic cross-sectional view of the light emitting device 10 (a cross-sectional view of the light emitting device 10 cut along the line IV-IV of FIG. 3).

As shown in FIG. 4, the substrate 11 included in the light emitting device 10 has a base material 11a, a wiring layer 11b formed on the base material 11a, and a cover resist 11c covering the wiring layer 11b. The base material 11a and the cover resist 11c are formed of an insulating material. The wiring layer 11b is formed of, for example, a metal material such as copper. The cover resist 11c is not arranged in the portion of the wiring layer 11b to which the terminals of the plurality of circuit elements 15 are soldered.

The wiring layer 11b includes a pair of power supply wirings 13. The pair of power supply wirings 13 are wiring patterns formed as a part of the wiring layer 11b and running in parallel along the longitudinal direction (Y-axis direction) of the substrate 11. The pair of power supply wirings 13 are wirings 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. Will be done.

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

The pair of power supply wirings 13 extend from one end (Y-axis − side end) to the other end (Y-axis + side end) of the substrate 11 in the longitudinal direction. One end of the pair of power supply wirings 13 is connected to the first terminal structure 12a, and the other end of the pair of power supply wirings 13 is connected to the second terminal structure 12b. The pair of power supply wiring 13 has no wiring or the like connected in the middle except for the branch wiring 13c (shown by the broken line in FIG. 3) for supplying AC power to the plurality of circuit elements 15, but protects the fuse and the like. The element may be arranged in the middle. Further, in a plan view, no circuit element or the like is arranged in the region between one of the pair of power supply wirings 13 and the other. By arranging the circuit elements and the like avoiding this region, it is possible to reduce the influence of noise from the pair of power supply wirings 13 on the circuit elements and the like.

The branch wiring 13c connected to the outer power supply wiring of the pair of power supply wiring 13 needs to intersect with the inner power supply wiring of the pair of power supply wiring 13. A circuit element such as a jumper (0Ω resistor) may be used for such an intersection, a multilayer board is used for the board 11, and the branch wiring 13c connected to the outer power supply wiring is other than the wiring layer 11b. It may be formed as part of a wiring layer.

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

Further, in the wiring layer 11b, in addition to the pair of power supply wiring 13, a wiring pattern 13a for electrically connecting a plurality of circuit elements 15, a wiring pattern 13b for electrically connecting a plurality of LED elements 14, and a branch wiring. 13c and the like are also included.

The substrate 11 may be a multilayer board including a plurality of wiring layers 11b. In this case, the pair of power supply wirings 13 may be formed as a part of any of the wiring layers 11b among the plurality of wiring layers 11b. Good.

[LED element 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 has a package having a recess, an LED chip mounted on the bottom surface of the recess of the package, and a sealing member filled in the recess of the package to seal 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 on the upper surface of the substrate 11 in a straight line along the longitudinal direction of the substrate 11 to form a light emitting element row 14a. In a plan view, the light emitting element row 14a is located at the end on the X-axis + side of the substrate 11. The plurality of LED elements 14 may be arranged side by side in a curved line. The plurality of LED elements 14 are arranged at equal intervals, for example.

The plurality of LED elements 14 are connected in series by a wiring pattern 13b (shown in FIG. 4) included in the wiring layer 11b. The electrical connection mode of the plurality of LED elements 14 (series connection, parallel connection, connection of a combination of series connection and parallel connection, etc.) is not particularly limited.

[Terminal structure of light emitting device]
The first terminal structure 12a is a pair of connectors arranged at one end (Y-axis-side end) in the longitudinal direction on the substrate 11 and electrically connected to the pair of power supply wirings 13. One connector is composed of, for example, a metal terminal and a housing. The first terminal structure 12a is electrically connected to the male power feeding terminal 61a by a pair of lead wires 70a. As a result, 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 embodiment of the first terminal structure 12a is not particularly limited, and may be realized as one connector having two lead wire insertion holes corresponding to a pair of lead wires 70a, for example. The first terminal structure 12a may have a terminal structure other than the connector. Further, the first terminal structure 12a may be arranged on the lower surface (the other main surface) of the substrate 11.

The second terminal structure 12b is a pair of connectors arranged at the other end (Y-axis + side end) in the longitudinal direction on the substrate 11 and electrically connected to the pair of power supply wirings 13. The second terminal structure 12b is electrically connected to the female power feeding terminal 61b by a pair of lead wires 70b. As a result, 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 embodiment of the second terminal structure 12b is not particularly limited, and may be realized as one connector having two lead wire insertion holes corresponding to a pair of lead wires 70b, for example. The second terminal structure 12b may have a terminal structure other than the connector. Further, the second terminal structure 12b may be arranged on the lower surface (the other main surface) of the substrate 11.

The first terminal structure 12a, the second terminal structure 12b, and the pair of power supply wirings 13 are arranged side by side (linearly) along the longitudinal direction of the substrate 11 in a plan view, but the first terminal The positions of the structure 12a and the second terminal structure 12b in the lateral direction may be deviated from the pair of power supply wirings 13.

[Multiple circuit elements included in the light emitting device]
The plurality of circuit elements 15 are arranged on the substrate 11 and are electrically connected by a wiring pattern 13a (shown in FIG. 4) included in the wiring layer 11b to form a power supply circuit (lighting circuit). The power supply circuit converts the AC power acquired through 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 electric power output by the power supply circuit. A part or all of the plurality of circuit elements 15 may be arranged 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 type power supply circuit. The power supply circuit is, for example, the AC power supplied to the first terminal structure 12a, and the AC power acquired from the pair of power supply wirings 13 via the branch wiring 13c (shown by the broken line in FIG. Convert to electric power (pulsating electric power).

The AC direct type power supply circuit controls to make more LED elements 14 emit light as the DC voltage (pulsating voltage) becomes 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, for example, a switching element such as a FET (Field Effect Transistor), and changes the number of LED elements that emit light by controlling the on / 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 in response 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, rectifying elements, fuses, noise filters, diodes, semiconductor elements such as integrated circuit elements, and the like. ..

In addition, circuit elements other than the plurality of circuit elements 15 constituting the power supply circuit may be arranged on the substrate 11. For example, on the substrate 11, a control circuit element or a lighting fixture 2 for controlling the light emitting state (dimming state, toning state, etc.) of the plurality of LED elements 14 communicates with other devices. Communication circuit elements and the like may be arranged.

[Case]
The housing 40 is an outer housing that forms the outer shell of the lighting fixture 2. The housing 40 has a substantially square tubular shape, and houses the light emitting device 10 inside. Specifically, the housing 40 covers the first housing 41 that covers the region of the substrate 11 on which the pair of power supply wirings 13 are formed, and the light emitting element rows 14a (plurality of LED elements 14) on the substrate 11. It is composed of two members with the second housing 42. The first housing 41 and the second housing 42 are fixed to each other by a locking structure, an adhesive, screws, or the like.

The first housing 41 is made of a material that does not have translucency. The first housing 41 is formed of, for example, 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 (board 11) is slid-inserted into the groove 43. That is, the groove 43 holds the light emitting device 10 in a slidable manner.

The second housing 42 is a translucent cover that transmits light emitted from the light emitting element row 14a. The second housing 42 is entirely made of a translucent material. The second housing 42 is formed of, for example, a translucent resin material such as acrylic or polycarbonate, but may be formed of a translucent material such as glass material.

The second housing 42 may further have light diffusivity (light scattering property). By giving the second housing 42 light diffusivity, it is possible to scatter the light from the LED element 14 having strong directivity, so that the feeling of crushing (luminance unevenness) due to the difference in light emission of the plurality of LED elements 14 Can be suppressed. Examples of the method of imparting light diffusivity to the second housing 42 include a method of dispersing the light diffusing material in the translucent resin material, a method of forming a light diffusing film on the surface of the translucent resin material, and the like. Is exemplified.

[End cover]
The end cover 60a 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 arranged on the end cover 60a. The male power supply terminal 61a has a shape and size corresponding to the female power supply terminal 61b, and the male power supply terminal 61a possessed by one luminaire 2 has a female power supply terminal 61b possessed by another luminaire 2. It is possible to connect.

The end cover 60b is an end cap that covers the other end of the housing 40 in the longitudinal direction. For example, a metal female power supply terminal 61b is arranged 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 possessed by one luminaire 2 has a male power supply terminal 61a possessed by the other luminaire 2. It is possible to connect.

The end cover 60a and the end cover 60b are fixed to the housing 40 by, for example, an adhesive, a screw, a claw structure, or the like. 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.

[Arrangement of components in the light emitting device]
Next, the arrangement of the components in the light emitting device 10 will be described with reference to FIG. Since the pair of power supply wirings 13 are used for transmission of AC power, they need to be arranged so as to secure an insulation distance from other parts. Therefore, in the wiring layer 11b, the pair of power supply wirings 13 are located at the ends in the X-axis direction intersecting (orthogonal) with the Y-axis direction. Specifically, the pair of power supply wirings 13 are located at the end on the X-axis side in a plan view.

As a result, no component is arranged at the position on the X-axis-side of the pair of power supply wirings 13 on the board 11, so that an insulation distance (space for insulation) is secured on the X-axis-side of the pair of power supply wirings 13. You don't have to. In other words, it is not necessary to secure insulation distances on both sides of the pair of power supply wirings 13 in the X-axis direction. Therefore, the width (length in the X-axis direction) of the substrate 11 can be shortened. That is, the substrate 11 can be miniaturized. Further, if the pair of power supply wirings 13 are arranged at the end on the X-axis side in the wiring layer 11b, the influence of the noise emitted from the pair of power supply wirings 13 on the light emitting element train 14a and the plurality of circuit elements 15. Can also be suppressed.

Further, in the substrate 11, a wiring pattern for heat dissipation may be arranged on the lower surface of the base material 11a. In this case as well, if the pair of power supply wirings 13 are arranged at the ends in the X-axis direction, the insulation distance can be increased. Since the area to be considered is reduced, the wiring pattern for heat dissipation can be widened.

Further, the power supply wiring corresponding to the N phase of the pair of power supply wirings 13 may be located inside the power supply wiring corresponding to the L phase. That is, in a plan view, the power supply wiring corresponding to the L phase may be arranged closer to the edge of the substrate 11 than the power supply wiring corresponding to the N phase.

As a result, the power supply wiring corresponding to the N phase to be grounded is arranged between the power supply wiring corresponding to the L phase and the plurality of LED elements 14 and the plurality of circuit elements 15, so that the power supply wiring corresponding to the L phase The influence of the noise generated in the above on a plurality of circuit elements 15 is reduced.

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

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

The plurality of circuit elements 15 include a first circuit element 15a and a second circuit element 15b having a height lower than that of the first circuit element 15a. Specifically, the first circuit element 15a is an electric field capacitor or the like. Specifically, the second circuit element 15b is a resistor having a lead, a chip component such as a chip resistor such as a chip resistor, a semiconductor element, an integrated circuit element, or the like.

How each circuit element included in the plurality of circuit elements 15 is arranged is not particularly limited. However, in the light emitting device 10, the first circuit element 15a is arranged closer to the pair of power supply wirings 13 (X-axis-side) than the second circuit element 15b in a plan view. In other words, in the plan view, the second circuit element 15b, which is lower in height than the first circuit element 15a, is arranged closer to the light emitting element train 14a (X-axis + side) than the first circuit element 15a.

As a result, since the second circuit element 15b, which is difficult to block the light emitted by the light emitting element row 14a, is arranged near the light emitting element row 14a, it is possible to suppress the formation of shadows or the like in the light emitted by the light emitting device 10. That is, the quality of the light emitted by the light emitting device 10 is improved.

[Effects, etc.]
As described above, the light emitting device 10 includes the substrate 11 including the wiring layer 11b, the first terminal structure 12a arranged at one end of the substrate 11 in the first direction, and the other in the first direction of the substrate 11. A pair of power supply wirings 13 formed as a part of the wiring layer 11b and a second terminal structure 12b arranged at the end of the power supply wiring 13 running in parallel in the first direction, and are supplied to the first terminal structure 12a. It includes a pair of power supply wirings 13 for transmitting AC power to the second terminal structure 12b. The light emitting device 10 is a plurality of circuit elements 15 arranged on the substrate 11, and is composed of a plurality of circuit elements 15 constituting a power supply circuit for converting AC power acquired via a pair of power supply wirings 13 and a power supply circuit. It includes an LED element 14 arranged on a substrate 11 that emits light using the output power. 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 wirings 13. Therefore, in the lighting device 1 in which a plurality of light emitting devices 10 can be connected along the first direction, it becomes easy to supply AC power to each light emitting device 10.

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 intersecting the first direction. The second direction is the X-axis direction in the above embodiment.

Since no component is arranged on the end side of the board 11 with respect to the pair of power supply wirings 13 on the board 11, it is necessary to secure an insulation distance (space for insulation) on the end side of the board 11 with respect to the pair of power supply wirings 13. Absent. Therefore, the width of the substrate 11 can be shortened. That is, the substrate 11 can be miniaturized.

Further, the light emitting device 10 includes a plurality of LED elements 14, and the plurality of LED elements 14 may be arranged side by side in the first direction on the substrate 11.

As a result, the light emitting device 10 can emit line-shaped light along the first direction.

Further, in a plan view, the plurality of circuit elements 15 may be located between the pair of power supply wirings 13 and the plurality of LED elements 14.

As a result, the pair of power supply wiring 13, the plurality of circuit elements 15, and the plurality of LED elements 14 are arranged corresponding to the flow of electric power, so that the wiring pattern (wiring routing) in the wiring layer 11b can be simplified. ..

Further, the plurality of circuit elements 15 may include a first circuit element 15a and a second circuit element 15b having a height lower than that of the first circuit element 15a. In a plan view, the first circuit element 15a may be located closer to the pair of power supply wirings 13 than the second circuit element 15b.

As a result, since the second circuit element 15b, which is difficult to block the light emitted by the light emitting element row 14a, is arranged near the light emitting element row 14a, it is possible to suppress the formation of shadows or the like in the light emitted by the light emitting device 10.

Further, the substrate 11 may have a long shape with the first direction as the longitudinal direction.

As a result, the light emitting device 10 can be applied to the long lighting device 1.

Further, the lighting device 1 includes a light emitting device 10 and a housing 40 for accommodating the light emitting device 10.

As a result, when the light emitting device 10 (lighting fixture 2) can be added in the lighting device 1, it becomes easy to supply AC power to the added light emitting device 10 (lighting fixture 2).

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

For example, in the above embodiment, the power supply circuit is an AC direct type power supply circuit, but the specific mode 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.

Further, in the above embodiment, the light emitting device is a light emitting device having an SMD structure, but a light emitting device having a COB (Chip On Board) structure may be used. 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. Further, the light emitting device may be a remote phosphor type light emitting device having an LED chip and a resin member containing phosphor particles arranged at a position away from the LED chip.

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

Further, as long as the gist of the present invention is not deviated, one or a plurality of embodiments may be obtained by subjecting the present embodiment to various modifications that can be conceived by those skilled in the art, or by combining components in different embodiments. It may be included in the range of.

1 Lighting device 10 Light emitting device 11 Board 11b Wiring layer 12a First terminal structure 12b Second terminal structure 13 Pair of power supply wiring 14 LED element (light emitting element)
15 Multiple circuit elements 15a First circuit element 15b Second circuit element 40 Housing

Claims (6)

The board including the wiring layer and
A first terminal structure arranged at one end of the substrate in the first direction,
A second terminal structure arranged at the other end of the substrate in the first direction,
A pair of power supply wirings formed as a part of the wiring layer and running in parallel in the first direction for transmitting AC power supplied to the first terminal structure to the second terminal structure. Power wiring and
A plurality of circuit elements arranged on the substrate, which constitute a circuit that converts and outputs the AC power acquired through the pair of power supply wirings, and a plurality of circuit elements.
A light emitting element arranged on the substrate, which emits light by using the electric power output by the circuit, is provided .
In plan view, the pair of power supply wirings are located at the end of the substrate in the second direction intersecting the first direction.
In a plan view, the power supply wiring corresponding to the live phase of the pair of power supply wirings is arranged closer to the end of the substrate than the power supply wiring corresponding to the neutral phase of the pair of power supply wirings. apparatus. The light emitting device includes a plurality of the light emitting elements.
A plurality of light emitting elements, light-emitting device according to claim 1 disposed on the substrate side by side in the first direction. The light emitting device according to claim 2 , wherein the plurality of circuit elements are located between the pair of power supply wirings and the plurality of light emitting elements in a plan view. The plurality of circuit elements include a first circuit element and a second circuit element having a height lower than that of the first circuit element.
The light emitting device according to claim 3 , wherein the first circuit element is located closer to the pair of power supply wirings than the second circuit element in a plan view. The light emitting device according to any one of claims 1 to 4 , wherein the substrate has a long shape with the first direction as the longitudinal direction. The light emitting device according to any one of claims 1 to 5 .
A lighting device including a housing for accommodating the light emitting device.

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