JP5958805B2 - Light source device and illumination device - Google Patents

Description

Embodiments described herein relate generally to a light source device and a lighting device that are suitable for performing illumination in a light-up or a stadium that beautifully produces a night landscape.

  2. Description of the Related Art Conventionally, for example, in an illumination device such as a projector, an HID lamp (high-intensity discharge lamp) that is relatively easy to increase in output is widely used as a light source in order to illuminate a distant irradiation object with sufficient brightness. ing. On the other hand, light emitting elements such as LEDs (light emitting diodes), which can be expected to have a long life and power saving, have recently been used as light sources instead of HID lamps.

  In this way, in the case of a lighting device using LEDs as a light source, a large number of LEDs are arranged in a radial or matrix form on a substrate for high output, and a light control unit is arranged in the light emission direction corresponding to each LED. An optical component having (a lens portion or the like) is disposed. Therefore, the light emitted from the LED is light-distributed by the light control unit and irradiates the irradiation object.

JP 2010-251191 A

  However, in the illumination device as described above, the arrangement of the light control unit in the optical component corresponding to each LED is inferior in density, and there is a problem that the space of the optical component cannot be used effectively.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a light source device and an illuminating device that can secure light control units in an optical component and secure a space for the optical component.

Light source device according to an embodiment of the present invention, a substrate, with a light source unit having a plurality of light emitting element mounted on the substrate, and opposed to the respective light emitting elements to form a plurality of rows, circles in a plan view A plurality of optical components having a substantially rectangular shape having a light control unit arranged so that a substantially equilateral triangle can be drawn when connecting the centers of three adjacent circular circles in adjacent rows with line segments. And each adjacent optical component is disposed so that one long side of one adjacent optical component and one short side of the other optical component are opposed to each other, A space portion is formed.

According to the embodiment of the present invention, it is possible to provide a light source device and an illuminating device that can densely control light control units in an optical component and secure a space for the optical component.

It is a perspective view which shows the illuminating device which concerns on the 1st Embodiment of this invention. It is a front view which shows the same illuminating device. It is sectional drawing cut | disconnected and shown along the XX line in FIG. It is a top view which shows the light source device in the illumination device. The optical component (lens component) in the same illuminating device is shown, (a) is a top view, (b) is a side view. It is sectional drawing cut | disconnected and shown along the XX line in Fig.5 (a). It is sectional drawing which shows the illuminating device which concerns on the 2nd Embodiment of this invention, and is equivalent to FIG. FIG. 5 is a plan view illustrating a comparative example of the light source device and corresponding to FIG. 4.

  A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3 show an illumination device, FIG. 4 shows a light source device, and FIGS. 5 and 6 show optical components.

  As representatively shown in FIG. 1, a projector is shown as an illumination device. This projector is a substantially box-shaped casing 1 as an apparatus main body, a light source section 2 arranged in the casing 1, and light emitted from the light source section 2 to distribute light to an irradiation object. And an optical component 3 that irradiates the light. Further, a power supply unit 4 that supplies power to the light source unit 2 and an arm 5 that supports the housing 1 are provided.

  As shown in FIGS. 1 to 3, the casing 1 is made of aluminum alloy die-cast in a box shape, and the surface is baked with acrylic, and the light irradiation direction side, that is, the front side is An opening space 11 is formed to accommodate the light source unit 2 and the optical component 3. The light source unit 2 includes a light emitting element 22, and the optical component 3 is a lens component and includes a lens unit.

  The opening on the front side has a substantially square shape and has a side of about 400 mm to 500 mm. In addition, a plurality of plate-like heat radiating fins 12 are formed on the rear side of the housing 1 and on the outer surface thereof. Each radiation fin 12 is formed in a vertical direction and substantially parallel to each other.

  In addition, a plurality of light source devices Ld composed of a light source unit Lu, which will be described in detail later, specifically, four light source devices Ld having a substantially square shape on the front side are combined in the inside of the opening. They are arranged in a square shape.

  As representatively shown in FIG. 3, the light source unit 2 includes a substrate 21 and a plurality of light emitting elements 22 mounted on the substrate 21. The board | substrate 21 is formed in the substantially square shape, and the four board | substrates 21 are arrange | positioned by the said housing | casing 1 (refer FIG.1 and FIG.2). A wiring pattern layer is formed of copper foil on the surface side of the substrate 21. The light emitting element 22 is electrically connected to the wiring pattern layer. Further, a white resist layer acting as a reflective layer is formed on the wiring pattern layer, that is, on the surface of the substrate 21.

  The board | substrate 21 is formed from the flat material of the ceramic material which is an insulating material, a glass epoxy resin board | substrate (FR-4), or a glass composite board | substrate (CEM-3). In addition, in order to improve heat dissipation, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity such as aluminum can be applied. Is not limited.

The light emitting element 22 is an LED and is a surface mount type (SMD (surface mount).
device)) LED package. As representatively shown in FIG. 4, a plurality of LED packages (shown by broken lines) are mounted on the substrate 21.

  Specifically, it is mounted on the substrate 21 so as to be divided into four blocks. These blocks have substantially the same form. For the sake of explanation, the first block 22-1, the second block 22-2, the third block 22-3, and the fourth block 22- 4

  Among these, for example, in the first block 22-1, the LED package is mounted in a plurality of rows in the left-right direction, that is, five element rows in the drawing. Five LED packages in one row are arranged, and the interval between adjacent LED packages is set to be approximately equal.

Further, the LED packages in the adjacent rows are arranged with their positions shifted. In other words, the LED packages in the other adjacent row are arranged at a substantially intermediate position between the LED packages in one adjacent row.
In such a first block 22-1, five LED packages are arranged in five rows, and a total of 25 LED packages are mounted.

  Next, in the second block 22-2, the arrangement relationship of the LED packages is the same as that of the first block 22-1, but the direction of the LED package rows is different. That is, in the drawing, the LED packages are mounted in a plurality of rows in the vertical direction.

  Similarly, the third block 22-3 has a different column direction from the second block 22-2, and is in the same direction as the first block 22-1 and forms a plurality of columns in the left-right direction in the figure. An LED package is mounted.

The fourth block 22-4 has a column direction different from that of the third block 22-3, and is in the same direction as the second block 22-2. In FIG. ing.
A space in which the light emitting element 22 is not mounted is formed in the substantially central portion of the substrate 21 formed by each mounting block.

  The LED package is an SMD package, which is roughly a case body formed of ceramics or synthetic resin, an LED chip fixed and disposed in the case body with a bonding member, and the LED chip is sealed. And a translucent resin for molding such as epoxy resin and silicone resin. In addition, an anode side electrode and a cathode side electrode are led out from the case body. The anode side electrode and the cathode side electrode are connected to the LED chip by a gold wire. Soldered to the wiring pattern layer.

  The LED chip is an LED chip that emits blue light. The translucent resin is mixed with a yellow phosphor in order to be excited by the light emitted from the LED chip and to emit white light.

  The light emitting element 22 may be mounted in a COB (chip on board) type that is directly mounted on the substrate 21, and the mounting method is not particularly limited.

  The optical component 3 is, for example, a lens component, and is disposed on the light emission direction side of the light source unit 2, that is, the front surface side, and controls the light emitted from the light source unit 2 to distribute the light toward the irradiation target. It has a function to irradiate.

  As representatively shown in FIGS. 5 and 6, the optical component 3 is formed of a transparent material such as polycarbonate resin or acrylic resin, for example, in a substantially rectangular shape, and includes a plurality of light control units 31 and spaces. Part 34.

  The light control unit 31 is a lens unit, and each light control unit 31 has a circular shape in plan view, that is, on the plane, as shown in FIG. The light control unit 31 is opposed to each of the light emitting elements 22 described above, and has a storage space 32 for the light emitting elements 22 formed in a columnar shape, as shown in FIG. 6, and expands in the light irradiation direction. And it is formed in a bowl shape.

  As shown in FIG. 5A, the circular arrangement relationship of the light control unit 31 is formed in a plurality of rows, specifically 5 rows so as to face each light emitting element 22, and 5 in one row. The light control units 31 are arranged so as to contact each other.

  Moreover, the mutual circular light control units 31 in the adjacent rows are arranged with their positions shifted. In other words, the light control units 31 in one adjacent row are arranged so that the centers of the light control units 31 in the other adjacent row are positioned at the mutually contacting portions.

  Specifically, the light control unit 31 is arranged so that a substantially equilateral triangle Ta can be drawn when three adjacent circular centers in adjacent columns are connected by line segments. In the light control units 31 arranged in this way, the intervals between the centers of the adjacent light control units 31 are equal.

  Therefore, the light control units 31 are arranged densely within a predetermined substantially rectangular area in the optical component 3, and the space portion 34 can be secured in the optical component 3.

  In the present embodiment, a mounting hole 33 for mounting the optical component 3 is formed in the space portion 34. The mounting hole 33 is formed in a bowl-shaped portion that is lowered by one step toward the back side of the optical component 3. Note that a wiring passage hole or the like may be formed in the space portion 34.

Here, FIG. 8 shows a light source device Ld ′ as a comparative example, and the light control units 31 ′ are arranged in a regular and grid pattern corresponding to the respective light emitting elements 22 ′. In the case of such an arrangement relationship, the light control units 31 ′ cannot be densely arranged within a predetermined area, and it is difficult to secure a space.
Next, the relationship and configuration of the light source unit Lu, the light source device Ld, and the illumination device will be described.
(Light source unit Lu)

  The light source unit Lu includes a light source unit 2 and an optical component 3, and is configured by combining the optical component 3 with the light source unit 2. That is, the light control unit 31 in the optical component 3 shown in FIG. 5 is arranged and configured to face the light emitting element 22 in the light source unit 2 as shown in FIGS. 3 and 4.

Specifically, the optical component 3 is attached to the housing 1 side by an attachment screw N that passes through the attachment hole 33 and is further screwed into the rear wall of the housing 1 through the through hole of the substrate 21. That is, the optical component 3 and the substrate 21 are fastened together by the mounting screw N and attached to the housing 1 side.
(Light source device Ld)
As shown in FIG. 4, the light source device Ld is configured by assembling and combining four light source units Lu.

  Specifically, four substantially rectangular optical components 3 are arranged on one substantially square substrate 21 on which the above-described light emitting element 22 is mounted so that the light control unit 31 faces the light emitting element 22. ing. Therefore, the optical component 3 is arranged corresponding to the mounting block of the light emitting element 22, that is, the first block 22-1, the second block 22-2, the third block 22-3, and the fourth block 22-4. Yes.

  For this reason, if the optical component 3 at the upper left of the figure is the first optical component 3-1, and the second optical component 3-2, the third optical component 3-3, and the fourth optical component 3-4 are clockwise, the light emitting element Similarly to the mounting block 22, the light control units 31 of the first optical component 3-1 are arranged in the horizontal direction in the drawing, and the light control units 31 of the second optical component 3-2 are arranged in the vertical direction in the drawing. The light control unit 31 of the third optical component 3-3 forms a row in the horizontal direction in the figure, and the light control unit 31 of the fourth optical component 3-4 forms a column in the vertical direction in the drawing. Will be placed.

  Here, the optical component 3 is formed in a substantially rectangular shape, and each adjacent optical component 3 has one long side of one adjacent optical component 3 and one short side of the other optical component 3. It arrange | positions so that it may oppose. For example, the short side of the first optical component 3-1 and the long side of the second optical component 3-2 are arranged so as to face each other, and the short side of the second optical component 3-2 Arranged so that the one long side of the third optical component 3-3 faces and the one short side of the third optical component 3-3 faces the one long side of the fourth optical component 3-4. Has been.

  Since the long side and the short side of the substantially rectangular optical component 3 naturally have a difference in length dimension, by arranging the optical component 3 as described above, the difference in the length dimension can be obtained. As a result, the central space portion S where the optical component 3 is not covered and the light emitting element 22 is not mounted can be formed in a substantially central portion of the substrate 21.

  By the way, as the temperature rises, the light output of the light-emitting element 22 such as an LED decreases, and the useful life is shortened. For this reason, it is necessary for the lighting device using the light emitting element 22 as a light source to suppress an increase in the temperature of the light emitting element 22 in order to extend the service life or improve the characteristics such as the light emission efficiency. . Further, the temperature of the central portion of the substrate 21 on which the light emitting element 22 is mounted tends to increase.

  However, according to the present embodiment, since the central space portion S is formed in the substantially central portion of the substrate 21, it is possible to effectively suppress the temperature rise of the light emitting element 22.

Incidentally, in the case of the comparative example shown in FIG. 8, the light-emitting elements 22 ′ are arranged in a lattice shape, and the optical component 3 ′ is formed in a substantially square shape. It is difficult to form a space in the center within the same area.
(Lighting device)

As shown in FIGS. 1 and 2, the illuminating device is a set of four substantially square light source devices Ld that are combined. Specifically, each light source device Ld is disposed in the opening of the housing 1 and is attached to the housing 1 side by mounting screws N that are screwed into the back wall of the housing 1 (see FIG. 3).
In this attached state, the back side of the substrate 21 is in surface contact with the back wall of the housing so that the substrate 21 is thermally coupled to the housing 1.

  In such an illuminating device, 100 light emitting elements 22 as light sources are used in one light source device Ld, and a total of 400 light emitting devices Ld are used in a set of four light source devices Ld.

Note that the number of the light source devices Ld is not limited to four. The lighting device can be configured using one or a plurality of light source devices Ld, and the number of exceptional applications is not limited.
Subsequently, as shown in FIGS. 1 and 3, the power supply unit 4 is provided on the back side of the housing 1 and attached to the heat radiating fins 12.

  The power supply unit 4 is configured by housing circuit components in a box-shaped case formed of an aluminum alloy die-cast, and is connected to a commercial AC power supply AC and receives the AC power supply AC to generate a DC output. Is to be generated. The power supply unit 4 is configured, for example, by connecting a smoothing capacitor between output terminals of a full-wave rectifier circuit, and connecting a DC voltage conversion circuit and current detection means to the smoothing capacitor. Therefore, the power supply unit 4 is connected to the light source unit 2, supplies the direct current output to the light emitting element 22, and controls the lighting of the light emitting element 22. The power supply unit 4 may be connected to an external DC power supply DC, receive the DC power supply DC, and supply a DC output to the light emitting element.

  The mounting position of the power supply unit 4 is not limited to the back side of the housing 1. You may make it attach to the side surface side of the housing | casing 1, and you may make it attach to the arm 5. FIG. Furthermore, the shape of the case of the power supply unit 4 can be changed as appropriate according to the mounting position.

  As shown in FIGS. 1 and 2, the arm 5 is formed in a substantially U-shape, and supports the housing 1 and can be adjusted so that the irradiation light can be irradiated in a target direction. Yes. The arm 5 includes a pedestal portion 51 and leg portions 52 extending from both end sides of the pedestal portion 51 in a substantially perpendicular direction.

  The leg portion 52 supports both sides of the housing 1 so as to be rotatable, that is, supports the light irradiation direction so that the elevation angle of the housing 1 can be changed. The elevation angle can be changed by tightening and loosening the handle 52a provided on the leg 52.

  The pedestal 51 is a part that is attached to a structure or the like and fixedly installs the projector on the structure or the like, and a rotating base 53 is formed at a substantially central portion of the pedestal 51. The turntable 53 is attached to a structure or the like by bolting. In this case, the casing 1 can be adjusted so that the irradiation light can be irradiated in a target direction by rotating the casing 1 in a direction (left-right direction) orthogonal to the elevation direction.

  As described above, the irradiation direction can be adjusted by adjusting the left and right directions by the rotary base 53 when the pedestal 51 is attached to a structure or the like, and by operating the handle 52 a provided on the leg 52. The elevation direction can be adjusted.

  A translucent front cover 6 is attached to the opening on the front side of the housing 1 to seal the opening hermetically through packing and ensure waterproofness. The front cover 6 can be made of tempered glass or polycarbonate material.

  In the illumination device as described above, the light control unit 31 in the optical component 3 faces the light emitting elements 22 and is densely arranged, so that the space part 34 can be secured in the optical component 3. . For this reason, it becomes possible to form the attachment hole 33 for attachment of the optical component 3 in the space part 34, and the space part 34 can be used effectively.

  Further, when the tightening force of the mounting screw N acts on the portion of the mounting hole 33, it is possible to suppress deformation such as distortion of the optical component 3 from affecting the light control unit 31. Accordingly, it is possible to avoid obstructing the optical characteristics of the optical component 3.

  Next, the operation of this embodiment will be described. The lighting device is used by attaching the arm 5 to, for example, a structure or the like, adjusting the irradiation direction toward the irradiation target, and turning on the power.

  When power is supplied to the power supply unit 4 in the installed state of the lighting device, the light emitting element 22 in the light source unit 2 is energized and the light emitting element 22 emits light. The light emitted from the light emitting element 22 is subjected to light distribution control by the light control unit 31 of the optical component 3 and is transmitted through the front cover 6 to be irradiated in a target direction.

Further, heat is generated as the light emitting element 22 emits light. This heat is conducted mainly from the back side of the substrate 21 to the housing 1, and further conducted to the plurality of radiating fins 12 and effectively radiated by a large surface area. Thereby, the temperature rise of the light emitting element 22 can be suppressed.
In this case, since the central space portion S is formed in the substantially central portion of the substrate 21, the temperature rise of the light emitting element 22 can be effectively suppressed.

  As described above, according to the present embodiment, since the light control units 31 in the optical component 3 are densely packed, the space for the optical component 3 can be secured and the space can be used effectively. Moreover, since the central space part S is formed in the board | substrate 21, it becomes possible to suppress the temperature rise of the light emitting element 22 effectively.

  Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent part, and the overlapping description is abbreviate | omitted. FIG. 7 is a cross-sectional view corresponding to FIG. 3 in the first embodiment.

  The configuration of the optical component 3 is different between the present embodiment and the first embodiment. While the optical component 3 of the first embodiment is a lens component, the optical component 3 of the present embodiment is a reflector component. Further, the light control unit 31 is a reflection surface unit, and each light control unit 31 has a circular shape in a plan view, as in the first embodiment, and has three adjacent circular shapes in adjacent rows. Are arranged so that a substantially regular triangle Ta can be drawn.

The light control unit 31 is formed in a concave shape so as to expand in the light irradiation direction, and the inner surface side is configured to have a mirror finish, white coating, or the like, so that the reflectance is increased.
The optical component 3 can be formed of a material such as synthetic resin or aluminum.

According to such a configuration, the light emitted from the light emitting element 22 is reflected directly or by the reflection surface portion that is the light control portion 31 and is subjected to light distribution control, and is transmitted through the front cover 6 and irradiated in the target direction. The
As described above, according to the present embodiment, the same operational effects as those of the first embodiment can be obtained.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. Moreover, each said embodiment is shown as an example and is not intending limiting the range of invention.

For example, the optical component only needs to have a function of controlling light distribution of light emitted from the light emitting element, and is not limited to a lens component or the like. Further, the light emitting color of the light emitting element is not limited to white, but may be configured to be red, green, or blue light emitting color, or a color mixture of these to obtain a desired light emitting color, or a variable color. .
Furthermore, as the lighting device, a projector is suitable, but it can be applied to various lighting fixtures used indoors or outdoors.

DESCRIPTION OF SYMBOLS 1 ... Apparatus main body (casing), 2 ... Light source part,
3 ... optical components, 4 ... power supply unit,
5 ... arm, 6 ... front cover,
21 ... substrate, 22 ... light emitting element (LED),
31 ... Light control unit, 32 ... Storage space,
33 ... Mounting hole, 34 ... Space part,
Ld ... light source device, Lu ... light source unit,
S: Central space

Claims (2)

A light source unit having a substrate and a plurality of light emitting elements mounted on the substrate;
Opposite each light emitting element, forming a plurality of rows, forming a circular shape in plan view, and drawing a substantially equilateral triangle when three adjacent circular circle centers in adjacent rows are connected by line segments A plurality of substantially rectangular optical components having light control units arranged in such a manner that each adjacent optical component has one long side of one adjacent optical component and one short side of the other optical component. The light source device is characterized in that a central space portion is formed at a substantially central portion of the substrate, the central space portion being disposed so as to face the side. The device body;
The light source device according to claim 1 disposed in the device main body;
An illumination device comprising:

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