JP4564465B2 - Light source body and lighting device - Google Patents

Description

  The present invention relates to a light source body in which a plurality of light emitting elements are arranged, and an illumination device including the light source body.

  2. Description of the Related Art Conventionally, lighting devices using a light guide plate are known as backlights for advertising light panels and liquid crystal display devices. This type of lighting device is provided with an elongated light source body for allowing light to enter from the side surface side of the light guide plate, and a fluorescent tube is generally used as the light source body.

  However, an illumination device using a fluorescent tube as a light source has a problem that it is difficult to save energy because the energy efficiency of the fluorescent tube is not good. In addition, since the life is short, replacement work is complicated, and there is a problem that the maintenance cost becomes high. In addition, there is a problem that it is difficult to cope with thinning due to restrictions on the diameter of the fluorescent tube, and there is a problem that it is impossible to manufacture a light source body having a size exceeding the limit because there is a limit to the length of the fluorescent tube that can be manufactured. there were.

In order to solve these problems, recently, an illumination device using a light-emitting diode (English name: Light-Emitting Diode, abbreviated: LED) as a light source instead of a fluorescent tube has been proposed. The light source body is configured by arranging a plurality of LEDs at a predetermined interval on a substrate (see, for example, Patent Document 1).
JP 2005-19299 A

  However, in the illuminating device disclosed in Patent Document 1 described above, the LEDs are arranged on the substrate at intervals of 5 to 10 cm. There is a problem that appears. In addition, there is a problem that it is difficult to ensure a sufficient amount of light and it is difficult to ensure a predetermined illuminance.

  On the other hand, in order to solve these problems, it is conceivable to reduce the arrangement interval of the LEDs, or to use a high-capacity LED and pass a high current. In such a case, Since the amount of heat generated from the light source body increases, there is a problem that the life of the light source body is shortened. Furthermore, since a heat dissipation measure is required to process the increased amount of heat generation, it is difficult to save energy and space, and there is a problem that the merit of using the LED is reduced.

  The present invention has been made to solve the above-described problems, and can secure a sufficient amount of light and illuminance, extend the life, improve the heat dissipation performance, and save energy and space. An object of the present invention is to provide a light source body and an illumination device.

  In order to achieve the above object, the present invention provides a substrate having a plurality of light emitting elements arranged on the surface, a frame that holds the substrate in a state where the surface side of the substrate is opened, and supplies power to the light emitting elements. A light source body including a wiring for connecting the wiring to the back surface of the substrate at least one of both side end portions and at least one portion between the side end portions. An electrode terminal is provided, and a wiring space for accommodating a wiring to the electrode terminal is provided between the back surface of the substrate and the frame.

  According to the present invention, the length of the substrate can be increased by connecting the electrode terminals at both ends, or can be shortened by cutting the substrate. It can correspond to. Further, by connecting the wiring to the electrode terminal provided between the both end portions, it is possible to prevent disconnection due to the bending of the wiring at the connection portion. Furthermore, space saving can be achieved by providing a wiring space for accommodating the wiring to the electrode terminal between the back surface of the substrate and the frame.

  The substrate is formed by a plurality of blocks on which a predetermined number of the light emitting elements are mounted, the light emitting elements in the block are connected by a series circuit, and the blocks are connected by a parallel circuit. Preferably it is.

  With this configuration, it is possible to perform a circuit design that balances low voltage and low current.

  Further, it is preferable that a heat radiating member is provided between the back surface of the substrate and the frame, and the wiring space is formed so as to be surrounded by the heat radiating member, the substrate and the frame.

  By comprising in this way, the heat_generation | fever from a board | substrate can be thermally radiated outside efficiently, and size reduction of a light source body can be achieved.

  Furthermore, it is preferable that a heat transfer portion is formed on substantially the entire front surface and back surface of the substrate.

  By comprising in this way, since heat conductive performance can be improved further, heat dissipation performance can be improved further.

  Moreover, it is preferable that this invention is an illuminating device provided with the above-mentioned light source body.

  Furthermore, the present invention is preferably an illuminating device including a light guide plate that allows light emitted from the light emitting element to enter the inside from the side surface side and exit from the front side.

  As described above, by applying the present invention to a lighting device, a continuous line light source with reduced light spots can be realized with high efficiency, and sufficient light quantity and illuminance can be secured.

  According to the present invention, the length of the substrate can be increased by connecting the electrode terminals at both ends, or can be shortened by cutting the substrate. It can correspond to. Further, by connecting the wiring to the electrode terminal provided between the both end portions, it is possible to prevent disconnection due to the bending of the wiring at the connection portion. Furthermore, space saving can be achieved by providing a wiring space for accommodating the wiring to the electrode terminal between the back surface of the substrate and the frame.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in the following description, the case where this invention is applied to the illuminating device of the type attached to a shelf board is illustrated and demonstrated. Here, FIG. 1 is a rear view showing the lighting apparatus according to the present embodiment, FIG. 2 is a view taken along arrow AA in FIG. 1, FIG. 3 is a plan view showing the light source body according to the present embodiment, and FIG. 3 is a side view of the light source body, FIG. 6 is a rear view showing the substrate of the light source body, FIG. 7 is a rear view showing the substrate of the light source body in an enlarged manner, and FIG. 9 is a circuit diagram of the light source body, FIG. 9 is a plan view showing the substrate of the light source body, and FIG. 10 is a perspective view showing a state where the lighting device according to the present embodiment is attached to the shelf board.

  A lighting device 1 according to an embodiment of the present invention is attached to a horizontally long main body base 2 along the longitudinal direction of the main body base 2 at the upper and lower portions of the main body base 2 as shown in FIGS. Two light source bodies 3 are provided.

  The main body base 2 is made of aluminum, and a light source body upper accommodating portion 4 is formed in the upper portion along the longitudinal direction of the main body base 2, and the light source body upper accommodating portion 4 is inclined backward in the posture. A light source fixing part 5 is formed. An upper opening 6 is formed to be inclined on the upper rear side of the light source body fixing portion 5, and insertion grooves 7 are formed above and below the upper opening 6. A transparent cover sheet 8 is inserted into the insertion groove 7, and a diffusion member 9 is inserted above the cover sheet 8 so as to be curved outwardly.

  A light source body lower accommodating portion 10 is formed in the lower portion of the main body base 2 along the longitudinal direction of the main body base 2, and the light source body is fixed in a posture inclined forward in the light source body lower accommodating portion 10. Part 11 is formed. A lower opening 12 is formed on the lower rear side of the light source body fixing portion 11 so as to be inclined, and insertion grooves 13 are formed above and below the lower opening 12. A transparent cover sheet 14 is inserted into the insertion groove 13.

  A concave portion 15 having a substantially U-shaped cross section is formed on the rear surface side of the main body base 2 along the longitudinal direction of the main body base 2, and a pair of upper and lower clamping portions 16, 17 are opposed to the concave portion 15. Is formed. And the elastic body fitting part 18 is formed in the clamping part 17 of the lower side, and the elastic body 19 which comprises a cylindrical tube shape is fitted in the both sides of the elastic body fitting part 18, respectively.

  Moreover, the opening is formed in the both ends of the main body base 2, and the cap 20 is mounted | worn so that this opening may be obstruct | occluded. The cap 20 has a notch 21 for taking out a lead wire.

  As shown in FIGS. 3, 4, and 5, the light source 3 holds an elongated substrate 23 in which a number of LEDs 22 as light emitting elements are arranged on the surface, and the substrate 23 with the surface side of the substrate 23 open. Frame 24, a heat radiation member 25 interposed between the back surface of the substrate 23 and the frame 24, and a wiring 26 for supplying power to the LED 22.

  The LEDs 22 are of a surface mount type and are linearly arranged on the substrate 23 at a pitch of 1.5 to 3 times its width. The substrate 23 is a glass epoxy substrate, and the front surface of the substrate 23 and the surface of the heat transfer section 29 on the back surface are colored white by silk printing or white resist. Thus, by coloring the surface of the substrate 23 white, the reflectance of the light from the LED 22 can be increased and the light amount loss of the LED 22 can be reduced, so that sufficient light amount and illuminance can be ensured. The substrate 23 is not limited to the glass epoxy substrate described above, and may be an iron plate substrate.

  The board 23 is formed by a plurality of blocks 27 each having a predetermined number of LEDs 22 mounted thereon as shown in FIGS. 8 and 9, and the LEDs 22 in each block 27 are connected by a series circuit. They are connected by a parallel circuit. Thereby, since the board | substrate 23 can be cut | disconnected by the block 27 unit, the length of the board | substrate 23 can be arbitrarily adjusted according to a use, a request | requirement, etc.

  In the case of the present embodiment, the LED 22 has a width of 2 mm, the arrangement pitch on the substrate 23 (interval between the LEDs 22) is set to 3 mm, and a total of 147 pieces are provided. The length is set to 8 mm and the length is 441 mm. Each block 27 is composed of seven LEDs 22 and has a length of 21 mm. One resistor 28 is attached to each block 27 on the back surface of the substrate 23. The number of LEDs 22 constituting each block 27 is determined by the specifications of the LEDs 22 to be used and the supply power supply voltage. As in this embodiment, when the LEDs 22 are 3V specifications and the supply voltage is 24V, the number of LEDs 22 is 8 For example, when the specification of the LED 22 is the same (3V) and the supply voltage is 15V, the LED 22 is composed of 5 or less LEDs 22.

  Further, as well shown in FIGS. 7 and 9, a heat transfer section 29 is formed on substantially the entire front surface and back surface of the substrate 23. Specifically, in the case of this embodiment, the substrate 23 is formed. The circuit pattern is formed so that about 80% of the area of the front surface and the back surface is covered with the heat transfer portion 29 made of the copper foil portion. Thereby, thermal conductivity can be improved and the heat generated from the LED 22 can be efficiently released to the outside.

  Furthermore, on the back surface of the substrate 23, as shown in FIG. 6, the wiring 26 is connected to at least one of the side end portions 41a and 41b and at least one portion between the side end portions 41a and 41b. In the present embodiment, the electrode terminals 30 are formed at a total of four locations, that is, the side end portions 41a and 41b and two locations therebetween. And the length of the board | substrate 22 can be lengthened by connecting the electrode terminals 30 of the both-sides edge part 41a, 41b or any one edge part of the some board | substrate 22 according to a use, a request | requirement, etc. The length of the substrate 23 can be arbitrarily set. In addition, the internal electrode terminal 30 between the side end portions 41a and 41b is used to supply power to the substrate 22, and by soldering the wiring 26 to the electrode terminal 30, wiring of the soldered portion is reduced. Disconnection due to bending can be prevented.

  The frame 24 is an aluminum extruded product having a U-shaped cross section, and in this embodiment, the length is set to 441 mm, the width is 10 mm, the height is 6.5 mm, and the wall thickness is set to about 1 mm. Yes.

  The heat dissipating member 25 has a sheet shape made of a silicone rubber-based resin, and is firmly fixed to the substrate 23 and the frame 24 by, for example, a silicone-based adhesive. Accordingly, heat generated from the LEDs 22 in the substrate 23 can be efficiently released from the heat dissipation member 25 to the outside via the frame 24, and the heat dissipation member 25 also functions as a buffer member, so that the heat is applied to the substrate 23 from the outside. The impact can be mitigated, and disconnection of the wiring 26 and damage to the LED 22 due to the impact can be prevented.

  Moreover, the light source body 3 of this Embodiment has the wiring 26 so that it may be surrounded by the heat radiating member 25, the back surface of the board | substrate 23, and the flame | frame 24 along the both sides of the heat radiating member 25, as shown in FIG. A wiring space 31 for housing is formed. By passing the wiring 26 through the wiring space 31, the wiring 26 soldered to the internal electrode terminal 30 can be drawn out from the end of the substrate 23.

  When the lighting device 1 shown in FIGS. 1 and 2 provided with the light source body 3 having such a configuration is arranged in parallel on a shelf plate 36 arranged in multiple stages and multiple rows (three rows and two rows in FIG. 10), The concave portions 15 of the respective lighting devices 1 are inserted into the front end portions 37 of the shelf plates 36 in the respective rows and columns. Then, due to the elastic force of the elastic body 19, the shelf plate 36 is sandwiched between the upper and lower clamping portions 16 and 17, and each lighting device 1 is fixed horizontally to the shelf plate 36 in each row.

  Next, the lighting devices 1 and 1 fixed to the shelf plates 36 adjacent to the left and right are connected by connecting the wirings 26 taken out from the notches 21 of the cap 20 facing each other, and one side (FIG. 10). Then, the wiring 26 taken out from the other notch 21 of the lighting device 1 is connected to a power source (not shown).

  Thus, when the lighting device 1 is set in each shelf plate 36 and is turned on, light is emitted from the LED 22 of the light source body 3 accommodated in the light source body upper accommodating portion 4 toward the upper rear side. The light is diffused by passing through the diffusion member 9. At this time, since the diffusing member 9 is formed to be curved in a convex shape on the outer side and a sufficient distance is secured between the LED 22 and the diffusing member 9, the light emitted from the LED 22 is sufficient. It is diffused and the product on the shelf board 36 can be widely irradiated from the front lower side. Further, since the LEDs 22 are arranged at a narrow pitch on the surface of the substrate 23, the light emitted in a dot shape from each LED 22 interferes with each other and passes through the diffusing member 9 to generate continuous linear light. Become.

On the other hand, light is emitted toward the lower rear side from the LED 22 of the light source body 3 accommodated in the light source body lower accommodation portion 10, and interferes with the light from the LED 22 of the light source body 3 accommodated in the light source body upper accommodation portion 4. The product on the shelf board 36 is irradiated from the front upper side. At this time, the heat generated from the LEDs 22 on the substrate 23 is transmitted from the heat radiating member 25 to the frame 24 and spontaneously released to the outside.
(Main effects of this embodiment)
As described above, according to the light source body 3 and the lighting device 1 according to the present embodiment, the LED 22 is used as a light source, and therefore, energy saving and long life can be achieved as compared with incandescent lamps and fluorescent lamps. Can do. In addition, since a large number of LEDs 22 are linearly arranged at a narrow pitch on the elongated substrate 23, a continuous line light source with reduced light spots can be realized by using the LED 22 as a point light source. Furthermore, since the electrode terminal 30 is formed on the back surface of the substrate 23, a large number of LEDs 22 can be efficiently arranged on the surface of the substrate 23, and a sufficient amount of light and illuminance can be ensured. Further, by securing the wiring space 31 of the wiring 26 under the substrate 23, the light source body 3 and the lighting device 1 including the light source body 3 can be reduced in size and thickness.

  In addition, a heat transfer portion 29 made of a copper foil portion is formed on substantially the entire surface of the front surface and the back surface of the substrate 23, and the material of the frame 24 is made of aluminum, so that heat dissipation and adhesion are provided between the frame 24 and the substrate 23. Since the high heat radiating member 25 is interposed, the heat generated along with the light emission of the LED 22 can be efficiently transmitted from the substrate 23 to the frame 24 to be radiated. Furthermore, since the lifetime of the LED 22 can be extended by dissipating heat, the lifetime of the light source body 3 and the lighting device 1 including the light source body 3 can also be extended.

Further, the substrate 23 is constituted by a plurality of blocks 27 each having a predetermined number of LEDs 22 connected in series, and each block 27 is connected in a parallel circuit, thereby achieving a low voltage and low current balance. Circuit design can be performed.
(Other embodiments)
In the above-described embodiment, the case where the present invention is applied to a lighting device of a type that is attached to a shelf board is described. However, this is merely an example, and the present invention is directed to the side view of light emitted from the LED 22. The present invention can also be applied to other types of lighting devices such as a light panel and a sign panel provided with a light guide plate that enters the inside from the side and exits from the front surface.

  Moreover, as a light emitting element of the light source body 3, it is not limited to above-mentioned LED22, You may use other light emitting elements, such as a light emitting organic EL element.

It is a rear view which shows the illuminating device which concerns on embodiment of this invention. It is an AA arrow line view of FIG. It is a top view which shows the light source body which concerns on embodiment of this invention. It is a BB arrow line view of FIG. It is a side view which shows the light source body which concerns on embodiment of this invention. It is a rear view which shows the board | substrate of the light source body which concerns on embodiment of this invention. It is a rear view which expands and shows the board | substrate of the light source body which concerns on embodiment of this invention. It is a circuit diagram of the light source body concerning an embodiment of the invention. It is a top view which shows the board | substrate of the light source body which concerns on embodiment of this invention. It is a perspective view which shows the state which attached the illuminating device which concerns on embodiment of this invention to the shelf board.

Explanation of symbols

1 Illumination Device 3 Light Source 22 LED
23 Substrate 24 Frame 25 Heat dissipation member 26 Wiring 27 Block 29 Heat transfer section 30 Electrode terminal 31 Wiring space

Claims (5)

A light source body comprising a substrate on which a plurality of light emitting elements are arranged on the surface, a frame that holds the substrate in a state where the surface side of the substrate is opened, and wiring that supplies power to the light emitting elements,
On the back surface of the substrate, an electrode terminal for connecting the wiring is provided at at least one end portion of both side end portions and at least one portion between both side end portions. Between the back surface and the frame, a wiring space and a heat dissipating member for accommodating the wiring to the electrode terminal are provided, and the wiring space is surrounded by the heat dissipating member, the substrate, and the frame. A light source body characterized by being formed . The board is formed by a plurality of blocks each mounting a predetermined number of the light emitting elements, the light emitting elements in the block are connected by a series circuit, and the blocks are connected by a parallel circuit. Item 2. The light source body according to Item 1. Light source according to claim 1 or 2 heat transfer portion is formed on substantially the entire surface of the front and back surfaces of the substrate. An illumination apparatus comprising the light source body according to any one of claims 1 to 3 . The illuminating device according to claim 4 , further comprising a light guide plate that causes light emitted from the light emitting element to enter the inside from the side surface side and exit from the front surface side.

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