JP2014063691A - Light emitting device and lighting apparatus - Google Patents

Abstract

【Task】
An object of the present invention is to provide a light-emitting device and a lighting device that can improve manufacturability and widen design freedom.
[Solution]
According to the present embodiment, the lamp 11 includes a plurality of substrates 21 that are continuously connected in a predetermined direction. And the mounting interval of each light emitting element 45 on the board | substrate 21 of this lamp | ramp 11 is not fixed, but is formed so that the center side may become larger than one edge part side 15a1-15d1 of each board | substrate 21 in a longitudinal direction. In addition, the maximum dimension X in the mounting interval on each substrate 21 is the light emitting element 45 provided on the other end 15a2 to 15d2 side of each substrate 21 and the other end 15a2 of this substrate 45. It is formed to be longer than the length Y of 15d2.
[Selection] Figure 4

Description

  Embodiments described herein relate generally to a light emitting device and a lighting device.

  In recent years, a chip on board (COB) system in which a plurality of LED chips are mounted on a substrate has become common as an LED (light emitting diode) module. In this COB, in recent years, a light emitting module in which LED chips are provided in a line on the substrate at equal intervals has appeared. For example, in a straight tube type LED lamp, a plurality of light emitting modules are connected and used. As described above, in the straight tube LED lamp, a plurality of light emitting modules are connected and used, but the intervals between the LED chips in the plurality of light emitting modules used are all the same.

JP 2001-351402 A

  However, since the intervals between the LED chips in the plurality of light emitting modules used are all the same, when trying to commercialize different types of products with different luminous fluxes and light colors in the straight tube LED lamp as described above, there are several It was necessary to prepare a substrate on which LED chips were mounted in a pattern. That is, there is a possibility that a substrate is required for each product type, and manufacturability, inventory management, and the like are complicated. In addition, since the design is performed under the condition that the mounting intervals of the LED chips are the same, the degree of freedom in design becomes narrow.

  An object of the present invention is to provide a light-emitting device and a lighting device that can improve manufacturability and widen design freedom.

  In the light-emitting device according to the embodiment of the present invention, a plurality of substrates that are continuously connected in a predetermined direction and a mounting interval on the substrate are larger on the center side than on one end side in the longitudinal direction. The maximum dimension of the mounting interval on the substrate is larger than the length of the light emitting element provided at the outermost end on the other end side of the substrate and the other end portion of the substrate. And a plurality of light emitting elements provided side by side in the predetermined direction.

  According to the embodiment of the present invention, it is possible to provide a light emitting device that can reduce the manufacturing cost and increase the degree of design freedom by changing the mounting interval of the light emitting elements on the substrate.

It is a perspective view which shows the lighting fixture which concerns on 1st Embodiment. It is sectional drawing of the lighting fixture shown in FIG. It is a connection diagram of the lighting fixture of FIG. It is a figure which shows an example of a light emitting module. It is sectional drawing of the light emitting module shown along the F7-F7 line | wire of FIG.

  Hereinafter, the straight tube lamp of the first embodiment and a lighting device including the straight tube lamp, for example, a lighting fixture will be described with reference to FIGS.

  FIG. 1 is a perspective view showing a lighting apparatus according to the first embodiment. FIG. 2 is a cross-sectional view of the lighting fixture shown in FIG. 1 and 2, reference numeral 1 illustrates a direct-mounted lighting fixture.

  The lighting fixture 1 includes a device main body (device main body) 2, a lighting device 3, a pair of first and second sockets 4a and 4b, a reflecting member 5, a straight tube lamp 11 forming a light emitting device, and the like. It comprises.

  The apparatus main body 2 shown in FIG. 2 is made of an elongated metal plate, for example. The apparatus main body 2 extends in the front and back direction of the paper surface depicting FIG. The apparatus main body 2 is fixed to, for example, an indoor ceiling using a plurality of screws (not shown).

  The lighting device 3 is fixed to an intermediate portion in the longitudinal direction of the device body 2. The lighting device 3 receives a commercial AC power supply, generates a DC output, and supplies the DC output to a lamp 11 described later.

  Note that a power terminal block (not shown), a plurality of member indicating brackets, a pair of socket support members, and the like are attached to the apparatus body 2. The power supply terminal block is connected with a power supply line of a commercial AC power source drawn from behind the ceiling. Furthermore, the power terminal block is electrically connected to the lighting device 3 via an in-appliance wiring (not shown).

  The sockets 4a and 4b are connected to a socket support member and disposed at both ends in the longitudinal direction of the apparatus main body 2, respectively. The sockets 4a and 4b are of a rotational mounting type. The sockets 4a and 4b are sockets suitable for, for example, G13 type caps 13a and 13b provided in the lamp 11 described later.

  FIG. 3 is a connection diagram of the lighting fixture of FIG. As shown in FIG. 3, the sockets 4a and 4b have a pair of terminal fittings 8 or 9 to which lamp pins 16a and 16b described later are connected. In order to supply power to a lamp 11 to be described later, the terminal fitting 8 of the first socket 4a is connected to the lighting device 3 via the in-apparatus wiring. Note that no wiring is connected to the terminal fitting 9 of the second socket 4b.

  As shown in FIG. 2, the reflecting member 5 has, for example, a metal bottom plate portion 5a, a side plate portion 5b, and an end plate 5c, and has a trough shape with an open upper surface. The bottom plate part 5a is flat.

  The reflection member 5 covers the device main body 2 and each component attached to the device main body 2. This state is held by a removable decorative screw (see FIG. 1) 6. The decorative screw 6 penetrates the bottom plate portion 5a upward and is screwed into the member support fitting.

  The luminaire 1 is not limited to a configuration that supports only one lamp 11 to be described below. For example, it is possible to provide two pairs of sockets and support two lamps 11.

  The lamp 11 detachably supported by the sockets 4a and 4b will be described below with reference to FIGS. The lamp 11 has the same dimensions and outer diameter as existing fluorescent lamps. The lamp 11 includes a pipe 12, a first base 13 a and a second base 13 b attached to both ends of the pipe 12, a beam 14, and a plurality of, for example, four light emitting modules 15. In addition, when distinguishing the four light emitting modules 15, it attaches | subjects the figure with subscript ad and demonstrates and demonstrates.

  The pipe 12 is made of a translucent resin material, for example, in a long shape. As the resin material forming the pipe 12, a polycarbonate resin mixed with a light diffusing material can be suitably used. The diffuse transmittance of the pipe 12 is preferably 90% to 95%. As shown in FIG. 2, the pipe 12 has a pair of convex parts 12a on the inner surface of the upper part in its use state.

  The first base 13 a is attached to one end in the longitudinal direction of the pipe 12, and the second base 13 b is attached to the other end in the longitudinal direction of the pipe 12. These first and second caps 13a and 13b are detachably connected to the sockets 4a and 4b. With this connection, the lamp 11 supported by the sockets 4 a and 4 b is disposed immediately below the bottom plate portion 5 a of the reflecting member 5. A part of the light emitted from the lamp 11 to the outside enters the side plate portion 5 b of the reflecting member 5.

  As shown in FIG. 3, the first base 13a has two lamp pins 16a protruding to the outside. These lamps 16a are electrically insulated from each other. At the same time, the tip portions of the two lamp pins 16a are bent substantially at right angles so as to be separated from each other, and have an L shape. As shown in FIG. 3, the second base 13 b has one lamp pin 16 b that protrudes to the outside. The lamp pin 16b is provided at a columnar shaft portion and a tip portion of the columnar shaft portion, and has a front end portion (not shown) having an elliptical shape or an oval shape. T-shaped.

  The lamp pin 16a of the first base 13a is connected to the terminal fitting 8 of the socket 4a, and the lamp pin 16b of the second base 13b is connected to the terminal fitting 9 of the socket 4b, whereby the lamp 11 is connected to the socket 4a, 4b is mechanically supported. In this supported state, power can be supplied to the lamp 11 by the terminal fitting 8 in the socket 4a and the lamp pin 16a of the first base 13a in contact therewith.

  As shown in FIG. 2, the beam 14 is accommodated in the pipe 12. The beam 14 is a bar material having excellent mechanical strength, and is formed of, for example, an aluminum alloy for weight reduction. Both ends in the longitudinal direction of the beam 14 are electrically insulated and connected to the first base 13a and the second base 13b. The beam 14 has, for example, a plurality of substrate support portions 14a having a rib shape (one is shown in FIG. 2).

  FIG. 4 is a diagram illustrating an example of a light emitting module. As shown in FIG. 4, the four light emitting modules 15a to 15b are all formed in an elongated rectangular shape, and are arranged in a straight line. The length of the light emitting module row is substantially equal to the total length of the beam 14. Each light emitting module 15a-15d is being fixed with the screw which is screwed into the beam 14 and which is not illustrated.

  For this reason, the light emitting modules 15 a to 15 d are accommodated in the pipe 12 together with the beam 14. In this supported state, both end portions in the width direction of the light emitting modules 15 a to 15 d are placed on the convex portions 12 a of the pipe 12. Thereby, each light emitting module 15a-15d is arrange | positioned substantially horizontally above the largest width part in the pipe 12. FIG.

  FIG. 5 is a cross-sectional view of the light emitting module shown along line F7-F7 in FIG. In addition, FIG.

FIG. 5 is a cross-sectional view of the light emitting module shown along line F8-F8 in FIG. Shown in FIGS. 5 and 6

As described above, the light emitting module 15 includes a substrate 21, a wiring pattern 25, a protective member 41,

A plurality of light emitting elements 45, a first wire 51, a second wire 52, a sealing member 54, and various electric parts 55 to 59 are provided.

  The substrate 21 is formed of a base 22, a metal foil 23, and a cover layer 24. The base 22 is made of a flat plate made of resin such as glass epoxy resin.

  As shown in FIG. 5, the metal foil 23 is laminated on the back surface of the substrate 21, and is made of, for example, a copper foil. The cover layer 24 is laminated over the peripheral portion rear surface of the base 22 and the metal foil 23. The cover layer 24 is made of an insulating material, for example, a resist layer made of synthetic resin. The substrate 21 is reinforced by suppressing warpage by the metal foil 23 and the cover layer 24 laminated on the back surface. In the first embodiment, the length of the substrate 21 is defined to be a predetermined length so that the length of the four combinations can be accommodated in the pipe 12.

  The wiring pattern 25 has a three-layer structure and is formed on the surface of the base 22 (that is, the surface of the substrate 21). The first layer U is formed of copper plated on the surface of the base 22. The second layer M is plated on the first layer U and is formed of nickel. The third layer T is plated on the second layer M and is made of silver.

  For the protective member 41, for example, a white resist layer mainly composed of an electrically insulating synthetic resin can be suitably used. This white resist layer functions as a reflective layer having a high light reflectance.

  Each mounting pad 26 and each conductive connection portion 27 are formed in a portion where the third layer T is exposed without being covered with the protection member 41 when the protection member 41 is formed on the substrate 21. Each conductive connecting portion 27 is disposed in the vicinity of the mounting pad 26 in a pair with each mounting pad 26.

  The plurality of light emitting elements 45 are LED bare chips. For example, an LED bare chip that emits blue light is used as the bare chip. The bare LED chip has a light emitting layer on one surface of an element substrate made of sapphire and has a rectangular planar shape.

  In the plurality of light emitting elements 45, the other surface of the element substrate opposite to the one surface described above is fixed to the mounting pad 26, which is a reflective surface, using an adhesive 46. The light emitting elements 45 form a light emitting element array arranged in the longitudinal direction of the substrate 21 (direction in which the central axis extends).

  The adhesive 46 preferably has heat resistance in order to obtain adhesion durability, and further has translucency so that reflection can be performed directly under the light emitting element 45. As such an adhesive 46, a silicone resin adhesive can be used.

  The 1st wire 51 and the 2nd wire 52 consist of metal fine wires, for example, a gold fine wire, and are wired using a bonding machine.

  The intermediate portion 51c of the first wire 51 is a portion that occupies between one end 51a and the other end 51b. As shown in FIG. 5, the intermediate portion 51 c is formed so as to bend from the one end portion 51 a and be parallel to the light emitting element 45. The protrusion height h of the intermediate part 51c with respect to the light emitting element 45 is defined as 75 μm or more and 125 μm or less, preferably 60 μm or more and 100 μm or less. As a result, the wire-bonded first wire 51 is wired while maintaining a low height with respect to the light emitting element 45 as a reference.

  Therefore, the plurality of light emitting elements 45 emit light when electric power is supplied from the lighting device 3.

  The diameter D (see FIG. 5) of the sealing member 54 is defined as 1.0 to 1.4 times the pad diameter D1, and in the case of the first embodiment, the diameter D is 4.0 mm to 5.0 mm. It is. Thereby, a part of the mounting pad 26 is prevented from protruding from the sealing member 54. At the same time, there are not too many sealing members 54 with respect to the mounting pad 26, and the amount of the sealing member 54 used can be made appropriate while maintaining the aspect ratio described later.

  The height H of the sealing member 54 with respect to the light emitting element 45 is 1.0 mm or more. In order to ensure the height H of 1.0 mm or more, the aspect ratio of the sealing member 54 is set to 0.22 to 1.00. Here, the aspect ratio of the sealing member 54 is a ratio (H / D) of the diameter D of the sealing member 54 to the height H of the sealing member 54 with respect to the light emitting element 45.

  Furthermore, the ratio of the orthogonal diameters of the sealing member 54 is 0.55 to 1.00. Here, the ratio of the orthogonal diameters refers to the ratio of the diameters X and Y orthogonal to each other on the bottom surface of the sealing member 54 bonded to the substrate 21. The diameter X is the diameter of the bottom surface of the sealing member 54 that is arbitrarily drawn through the center of the light emitting element 45. The diameter Y is the diameter of the bottom surface of the sealing member 54 drawn perpendicularly to the diameter X.

  The electric component 55 shown in FIG. 4 is a capacitor. The electrical component 56 is a connector. The electrical component 57 is a rectifier diode, that is, a rectifier circuit. The electrical component 58 is a resistor. The electrical component 59 is an input connector. The electrical component 57 that is a rectifier circuit rectifies the power supplied from the lighting device 3. In addition, the electrical components 57 and 58 generate heat when energized.

  An electric component 55 made of a capacitor is mounted on each of the four light emitting modules 15. For example, the capacitor is connected in parallel to each of the light emitting element groups.

  The electrical component 55 arranged in this manner functions as a bypass element that bypasses the noise superimposed on the wiring pattern 25 of each light emitting module 15 to the light emitting element group. Thereby, the superimposition of noise on the light emitting element group is suppressed.

  The electrical component 56 formed of a connector is mounted only at one end of the light emitting modules 15a and 15d disposed at both ends in the longitudinal direction of the light emitting module row. Furthermore, the electrical component 56 is mounted on both ends in the longitudinal direction of the light emitting modules 15b and 15c disposed between the light emitting modules 15a and 15d. These electrical components 56 are connected to the terminal portion of the first wiring pattern 25a and the terminal portion of the second wiring pattern 25b.

  At the same time, the electrical components 56 of the adjacent light emitting modules 15 are connected to each other by an unillustrated electric wire. With such connection, the light emitting modules 15 are electrically connected in series.

  An electrical component 59 composed of an input connector is connected to the wiring pattern 25a of the light emitting module 15a. Electric wires (not shown) connected to the electrical component 59 are respectively connected to the lamp pins 16 a of the first base 13 a disposed closer to the electrical component 59.

  In addition, in the light emitting modules 15a to 15d in FIG. 4, all of the modules 15a to 15d are used in which the mounting intervals of the light emitting elements 45 on the modules are not common. Specifically, in the light emitting module 15a that is a non-light emitting component mounting substrate, electrical components 57, 58, and 59 such as a rectifier circuit and an input connector that are non-light emitting components are disposed at one end portion 15a1. A plurality of light emitting elements 45 are arranged side by side so as to be separated from the light emitting element 45 closest to the electric parts 57, 58, 59 side. The mounting interval is arranged on the electric parts 57, 58, 59 side. It is formed so that b and c are larger than the mounting interval a. And about this space | interval b and c, it forms so that b may become a short space | interval. That is, the minimum dimension of the module 15a is a, and the mounting interval of the light emitting elements 45 is gradually increased as the module 15a is mounted from the one end 15a1 to the other end 15a2. The maximum dimension of the mounting interval on the module 15a is the dimension X with the light emitting element 45 adjacent to the light emitting element 45 mounted at the position closest to the other end 15a2.

  Further, in the connecting portion 20 between the other end 15a2 of the module 15a and the one end 15b1 of the module 15b, the mounting interval z between the light emitting element 45 on the most other end side of the module 15a and the light emitting element 45 on the most end side of the module 15b is It is formed to be smaller than the dimension X. The mounting interval z is formed to be larger than a which is the minimum dimension of the module 15a.

  The module 15b and the module 15c have the same configuration. These modules 15b and 15c are formed so that the mounting interval of each light emitting element 45 provided on each end side 15b1, 15b2, 15c1 and 15c2 side is minimized, and the mounting interval on the center side of each module It is formed so that X1 is maximized. This is for suppressing formation of a dark portion in the continuous portion 20 in each module. Since there are areas where the light from the light emitting element 45 cannot be sufficiently reflected, such as the electrical components 56 and 55 that are non-light emitting parts and the fine gaps formed between the modules, the connected portion 20 and the vicinity of the connected portion 20 are Dark parts are easily formed. However, by forming the mounting interval of the light emitting elements 45 of the continuous portion 20 in each module as described above, formation of dark portions in the continuous portion 20 is suppressed, and the vicinity of the continuous portion 20 and the center of each module are suppressed. The difference in brightness from the vicinity of the part can be eliminated.

  The module 15d is formed such that the mounting interval of the light emitting elements 45 on the one end side 15d1 is the same as that of the modules 15b and 15c. However, the mounting interval on the other end side 15d2 is formed to be the maximum mounting interval X2. This is because, in the module 15a, a large number of non-light emitting components are arranged on the one end side 15a1, so that a dark part tends to be formed. This is to prevent it. That is, the module 15d is formed so that the mounting interval of the light emitting elements 45 is gradually increased from the one end side 15d1 to the other end side 15d2 and the mounting interval in the light emitting element 45 closest to the other end 15d2 is maximized. In this way, the brightness on the end side of the lamp 11 is intentionally lowered. This balances the apparent brightness when the lamp 11 is turned on.

  The effect | action of the lighting fixture 1 of this embodiment is demonstrated. When the switch SW is turned on while both ends of the straight tube lamp 11 are supported by the sockets 4 a and 4 b of the lighting fixture 1, the first base 13 a of the lamp 11 is connected via the lighting device 3. In addition, power is supplied from the first socket 4a. With this power supply, the light emitting elements 45 emit light all at once, and accordingly, the white light emitted from the sealing member 54 is diffused in the pipe 12 and transmitted through the pipe and emitted to the outside. Thereby, the space below the lamp 11 is illuminated. At the same time, part of the white light emitted from the pipe 12 is reflected by the side plate portion 5 b of the reflecting member 5 and illuminates the space above the lamp 11.

  The lamp 11 includes a plurality of substrates 21 that are continuously connected in a predetermined direction. The mounting interval of the light emitting elements 45 on the substrate 21 of the lamp 11 is formed so that the central side is larger than the one end side 15a1 to 15d1 of each substrate 21 in the longitudinal direction. The maximum dimension X in the mounting interval on the substrate 21 is the length between the light emitting element 45 provided on the other end 15a2 to 15d2 side of each substrate 21 and the other end 15a2 to 15d2 of the substrate 45. It is formed to be larger than Y.

  Thus, even when a module configuration is provided in which a plurality of lamps 11 are continuously arranged when designing a desired lamp 11, there is no restriction on the mounting interval of the light emitting elements 45, and thus the number of mounted units that can obtain a desired light output. Thus, each module 15a to 15d can be designed and manufactured at a mounting interval in consideration of the appearance. For this reason, it is possible to improve the manufacturability and the degree of freedom of design as compared with a lamp design in which the mounting interval of the light emitting elements 45 is selected from a combination of at least common substrates and modules to obtain a desired light output. .

  Moreover, according to this embodiment, the maximum dimension of the mounting interval on the board | substrate of each module 15a-15d is the light emitting element provided in the extreme end of each board | substrate in the connection part 20 which has arrange | positioned the several board | substrate adjacently. It is formed to be larger than the dimension Z between 45. In other words, in this configuration, the dimension Z between the light emitting elements 45 between the modules arranged in a row is configured to be smaller than at least the maximum mounting interval X on the modules 15a to 15d. Accordingly, even when the modules are not necessarily arranged adjacent to each other without a gap, the brightness feeling between the modules is reduced with respect to the brightness feeling of the light emitting elements 45 on the modules 15a to 15d. Can be suppressed. That is, in a configuration in which a plurality of modules are connected in series, it is possible to generally suppress a problem between modules in which the luminance feeling is likely to be lower than that in a dark part or other places by considering the relationship with the mounting interval in each module. Is.

  Further, according to the present embodiment, in the module 15a on which the electrical component 57 or the like, which is a non-light emitting component, is mounted, the mounting interval on the electrical component 57 etc. side is formed to be the smallest a among the mounting intervals of the module 15a. In addition, the mounting intervals b and c are formed so as to be gradually increased as compared with the mounting interval a. Therefore, when a plurality of modules 15a to 15d are arranged in series, the brightness is improved even in the area on the non-light emitting component side of the module 15a where the dark portion is easily noticeable. Since the mounting interval is increased as the distance from the electrical component 57 is increased, the occurrence of apparent luminance unevenness can be suppressed as much as possible by changing the mounting interval.

  Further, the minimum dimension a in the module 15a and the dimension z between the light emitting elements 45 between the connecting portions 20 between the modules 15a and 15b are formed so that the dimension a is smaller. This prevents the area of the connecting portion 20 between the modules 15a and 15b from becoming extremely brighter than the electrical component 57 side of the module 15a. That is, even if the plurality of modules 15a to 15d are connected in series, the end side on which the non-light emitting part is mounted is apparently not easily noticeable.

  In addition, since the modules 15b and 15c are formed so that the center side has the maximum dimension on the module, it is possible to suppress luminance unevenness such that the luminance decreases as the connecting portions 20 are approached. .

  Since the module 15d is formed so that the mounting interval on the other end 15d2 is the largest, the difference in brightness at both ends when configured as the lamp 11 is suppressed, and the apparent luminance is not uniform. Can be suppressed.

  In the present embodiment, the combination of three types of modules is used in setting the mounting interval. However, the present invention is not limited to these, and a combination of two types or four or more types of modules may be used. Further, a short and long mounting interval may be continuously repeated on one substrate, or the mounting interval may be set irregularly. In short, the entire mounting interval in each module is not particularly limited as long as it has the operation and effect of the present embodiment.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 3 ... Lighting device, 11 ... Lamp which is a light-emitting device, 15a-15d ... Light-emitting module, 21 ... Board | substrate, 45 ... Light-emitting element

Claims (4)

A plurality of substrates connected in series in a predetermined direction;
A plurality of light emitting elements mounted side by side in the predetermined direction on each substrate, and the mounting interval on the substrate is formed so that the central side is larger than the one end side in the longitudinal direction. In addition, the maximum dimension of the mounting interval on the substrate is formed to be larger than the length between the light emitting element provided at the outermost end on the other end side of the substrate and the other end portion of the substrate. With multiple light emitting elements:
A light emitting device comprising:   The maximum dimension in the mounting interval on each substrate is formed so as to be larger than the dimension between the light emitting elements provided at the end of each substrate in the continuous portion where a plurality of substrates are continuously arranged. The light-emitting device according to claim 1. At least one of the plurality of substrates connected in series is a non-light-emitting component mounting substrate including non-light-emitting components mounted side by side in the side-by-side direction of the light-emitting elements on one end side,
3. The non-light emitting component mounting board is set such that a mounting interval between light emitting elements arranged on the non-light emitting component side is a minimum dimension of the non-light emitting component mounting board. Light-emitting device. A light emitting device according to any one of claims 1 to 3;
A lighting device for supplying power to the light emitting device;
An illumination device comprising:

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