JP2006128415A - Light source support and light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source support or a light source device capable of changing the direction or the height of a light irradiating surface, and capable of suppressing cost increase or the deterioration of degree of freedom in selecting a product while minimizing the change of structure of a light source, with respect to the light source supporter for supporting the light source comprising a plate-mounting LED (Light Emitting Diode) or the light source device with the plate-mounting LED mounted on a substrate. <P>SOLUTION: The light source supporter 3 for supporting the light source 1 on the substrate 2 and connected conductively to the substrate 2 is provided between the light source 1 comprising the plate-mounting LED equipped with a mounting surface 124 at the opposite side of the light irradiating surface 121 and the substrate 2 for supplying power to the light source 1. Various functions except supporting of the light source 2 are given to the light source support 3 whereby the support 3 can be used as a compound functional component. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a light source support that supports a light source composed of a surface-mounted LED (light-emitting diode), or a light source device in which a surface-mounted LED is mounted on a substrate.

Conventionally, as this type of light source device, for example, those described in Patent Documents 1 and 2 below are known. These light source devices described in Patent Document 1 are composed of a light source composed of surface-mounted LEDs and a substrate that supplies power to the light source. The light source is composed of an LED element made of a semiconductor light emitting element, an LED element made of an insulating material, and a frame body that holds a conduction path to the LED element. The frame includes a light emitting surface that emits light of the LED element and a mounting surface that is mounted on the substrate, and is soldered to the substrate.
Japanese Patent Laid-Open No. 02-298084

By the way, as the surface mount type LED, the top view type shown in Patent Document 1 is generally used, and products of various types and characteristics are commercially available. In order to change the height, it is necessary to change the structure of the light source, such as a frame, and there is a problem that the cost increases and the degree of freedom of product selection is reduced.
Accordingly, the present invention mainly aims to provide a light source support or a light source device that can change the direction and height of the light irradiation surface while eliminating or minimizing the structural change of the light source. Another object is to allow the light source support to function as a composite functional component by providing various functions other than support.

  In order to achieve the above object, the present invention is arranged between a light source composed of a surface-mounted LED and a substrate that supplies power to the light source, and supports the light source on the substrate and the light source on the substrate. A light source support characterized by conducting connection is applied.

  Further, the present invention is characterized by comprising: a light source comprising a surface-mounted LED; a substrate that supplies power to the light source; and a light source support that supports the light source on the substrate and is electrically connected to the substrate. To do.

  In the light source support, the first surface facing the light source mounting surface and the second surface facing the substrate may have a predetermined angle.

  Further, the present invention is characterized in that the light source and the light source support, or the light source support and the substrate are brought into pressure contact with each other by an elastic conductor.

  According to the present invention, the light source support is provided with a holding portion for holding the light source or a coupling portion for coupling to the substrate.

  Further, the present invention is characterized in that the light source support is provided with a heat radiating portion for radiating heat of the light source, or a heat radiating member is attached.

  In the invention, it is preferable that the light source support includes at least one of a reflection part that reflects light from the light source, a lens member that adjusts light from the light source, and an adjustment member that adjusts light color from the light source. It is characterized by.

  Further, the invention is characterized in that the light source support supports the plurality of light sources and is conductively connected to the substrate.

  In the invention, it is preferable that the light source support has a positioning portion for the substrate.

  Further, the present invention is characterized by including a light guide for guiding the light of the light source, and the light source support has a light guide positioning part for positioning the light guide.

  ADVANTAGE OF THE INVENTION According to this invention, the light source support body or light source device which can achieve the initial objective and can change the direction and height of a light irradiation surface can be provided, ensuring the freedom degree of selection of surface mounting LED.

  Hereinafter, embodiments of a light source support and a light source device according to the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a perspective view of a light source device according to the present embodiment. FIG. 2 is a view of the light source device of FIG. FIG. 3 is a cross-sectional view of the substrate in a front view, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in FIG.

  The light source device according to the present embodiment includes a light source 1 composed of surface-mounted LEDs, a substrate 2 that supplies power to the light source 1, a light source 1 supported on the substrate 2, and a conductive connection between the light source 1 and the substrate 2. It comprises a light source support 3.

  The light source 1 is composed of a general top view type surface mount type LED, and as shown in detail in FIG. 3, an LED element 11 composed of a semiconductor light emitting element (bare chip) and a frame body 12 composed of, for example, an insulating synthetic resin material. And a conductive portion (lead frame) 13 made of a metal material as appropriate, and a sealing body 14 made of a light-transmitting resin such as an epoxy resin or a silicone resin.

  The frame 12 is set in a substantially rectangular parallelepiped shape, and the LED element 11 is provided at the bottom of the recess 120 formed on one surface thereof. A part of the pair (anode and cathode) of the conductive portion 13 is exposed at the bottom of the recess 120, the LED element 11 is mounted through the exposed portion, and wire-bonded through a gold wire or the like. Further, after mounting the LED element 11 and wire bonding, the sealing body 14 is filled and formed in the recess 120. As a result, a light emitting surface 121 that emits the light of the LED element 11 is formed on one surface of the frame body 12. It is formed. Further, a part of the conductive part 13 is extended to the opposite side (bottom part) of the light emitting surface 121 via the side wall part of the frame body 12 to form a pair of electrode parts 122 and 123. As a result, light emission is achieved. On the opposite side of the surface 121, a mounting surface 124 from which the electrode portions 122 and 123 are exposed is formed, and the light source 1 is mounted and connected to the light source support 3 through the mounting surface 124.

  As shown in detail in FIG. 2, the substrate 2 includes, for example, a substrate portion 21 made of a glass epoxy material, a land portion 22 made of copper or the like formed on the substrate portion 21, and a required portion of the land portion 22. An insulating layer 23 made of a resist or the like is formed on the substrate portion 21 so as to be exposed, and power is supplied to the light source 1 through the land portion 22 and the light source support 3. The land portion 22 is connected to a predetermined circuit pattern (not shown).

  The light source support 3 is located between the light source 1 and the substrate 2, and has a function of supporting the light source 1 on the substrate 2 and electrically connecting the light source 1 and the substrate 2.

  The light source support 3 includes a main body 31 made of an insulating synthetic resin such as a heat-resistant polymer or ABS, and a pair of conductive members (conductors) 32 held by the main body 31 and having elasticity.

  The main body 31 is formed in a substantially rectangular parallelepiped shape, and is positioned on the opposite side of the first surface 311 facing the mounting surface 124 of the light source 1, the second surface 312 facing the substrate 2, and the second surface 312. The third surface 313 and the fourth and fifth surfaces 314 and 315 located so as to sandwich the second surface 312 and the third surface 313.

  As shown in FIGS. 1 and 2, a pair of hook-shaped holding portions 316 that hold the light source 1 and a pair of position restricting portions 317 that position the light source 1 are formed on the first surface 311.

  The holding part 316 includes an extension part 318 extending substantially parallel to the fourth and fifth surfaces 314, 315, and a claw part 319 provided at the tip of the extension part 318, and the light source 1 is connected between the holding parts 316. The light source 1 is prevented from moving to the opposite side of the arrow D1 through the claw portion 319. At this time, the light source 1 is elastically biased to the opposite side of the arrow D1 through a first connecting portion (described later) of the conductive member 32, and is thus sandwiched between the first connecting portion and the claw portion 319.

  The position restricting portion 317 is a protrusion that extends along the side wall of the light source 1, and the light source 1 determines the position in the thickness direction of the substrate 2 and prevents movement in the same direction.

  As shown in FIG. 2, a coupling portion 312 a that temporarily fixes the light source support 3 to the substrate 2 when the light source support 3 is soldered to the substrate 2 is formed on the second surface 312.

  The coupling portion 312 a has an extending portion 312 b extending to the substrate 2 side and an engaging claw portion 312 c that engages with the back surface of the substrate 2. Note that holes 24 are formed at two locations on the substrate corresponding to the coupling portion 312a.

  The conductive member 32 is made of, for example, phosphor bronze, brass, or the like, and is provided by insert molding or bending after insertion into the main body portion 31, and each of them is located in the main body portion 31, particularly as shown in FIGS. 1 and 4. And the base 320 exposed from the third surface 313 of the main body 31 and bent in a substantially inverted “U” shape, and its free end is located between the first surface 311 and the mounting surface 124 of the light source 1. Then, the first connection portion 321 that is press-conducted to the electrode portions 122 and 123 of the light source 1 and the fourth or fifth surface 314 and 315 project sideward and are soldered and connected to the land portion 22 of the substrate. And a second connecting portion 322 (in FIG. 1, an enclosing area S by an ellipse is indicated by a reference numeral 4 in FIG. 2 as a soldering location). The soldering of the second connection portion 322 is performed after the light source support 3 is temporarily fixed to the substrate 2 through the coupling portion 312a.

  Here, the assembly of the light source 1 is performed by fitting the light source 1 between the pair of holding portions 316 from the arrow D1 direction while positioning the light source 1 between the pair of position restricting portions 317. Since the holding portion 316 has elasticity and an inclined surface 319 a is formed at the tip of the claw portion 319, the interval between the holding portions 316 is widened when the light source 1 is inserted, and the claw portion 319 is a light emitting surface of the light source 1. When engaged with 121, the interval between the holding portions 316 is restored and the light source 1 is held. When the light source 1 is inserted, the first connecting portion 321 of the conductive member 32 is pressed against the first surface 311 while contacting the electrode portions 122 and 123 of the light source 1, and the light source 1 is engaged with the claw portion 319. When the position of the light source 1 is determined, the light source 1 is pressed toward the claw 319 side by the reaction force accompanying the pressing of the first connecting portion 321, whereby the light source 1 is stably supported with respect to the light source support 2 and conductive. Connected. The light source 1 may be mounted after the light source support 3 is soldered to the substrate 2, or the light source support 3 on which the light source 1 is mounted in advance may be soldered to the substrate 2.

  As described above, in the present embodiment, the light source 1 is disposed between the light source 1 composed of the surface-mounted LED having the mounting surface 124 on the opposite side of the light emitting surface 121 and the substrate 2 that supplies power to the light source 1. By providing the light source support 3 that is supported on the substrate 2 and is electrically connected to the substrate 2, the direction and height of the light irradiation surface can be changed while minimizing the structural change of the light source, and the cost is reduced. And lowering of the freedom of product selection can be suppressed.

  In the present embodiment, in the light source support 3, the first surface 311 facing the mounting surface 124 of the light source 1 and the second surface 312 facing the substrate 2 are set to have a predetermined angle. With this configuration, the direction of the light irradiation surface 121 can be changed or adjusted with a simple configuration. In the present embodiment, the first surface 311 and the second surface 312 are set to intersect at a predetermined angle of 90 degrees, but the angle may be set according to the direction of the light irradiation surface 121.

  Further, in this embodiment, the light source 1 and the light source support 3 are brought into pressure contact with the conductive member (conductor) 32 having elasticity, so that connection work such as soldering becomes unnecessary, and the light source 1 is attached to the light source support 3. Since the conductive connection is completed simply by doing, the connection workability can be improved. The conductive member 32 may have any material or shape as long as the light source 1 and the light source support 3 can be brought into pressure contact with each other.

  In the present embodiment, the light source support 3 is provided with the holding portion 316 that holds the light source 1, so that the light source 1 can be stably held without providing a special structure in the light source 1. Moreover, assembly workability can be improved. The holding unit 316 may have any number, form, and shape as long as the light source 1 can be held.

  In the present embodiment, the light source support 3 is provided with the coupling portion 312a that is coupled to the substrate 2, whereby the light source support 3 can be stably held with respect to the substrate 2 and the assembling workability is improved. Can be made. In addition, as long as the coupling | bond part 312a can hold | maintain the light source support body 3 to the board | substrate 2, the formation number, form, and shape are arbitrary.

  In the present embodiment, an example in which the single light source 1 is supported by the light source support 3 has been described, but a plurality of light sources 1 may be supported by the single light source support 3.

  FIG. 5 is a side view of an essential part showing a second embodiment of the present invention. In this embodiment, the second connecting portion 322 of the conductive member 32 is provided as a pressure contact piece having elasticity and is brought into pressure contact conduction with the substrate 2. Others are the same as in the first embodiment.

  According to the second embodiment configured as described above, the second connection portion 322 is provided as an elastic pressure contact piece and is brought into pressure contact with the substrate 2, thereby mounting the light source support 3 on the substrate 2. Connection work such as soldering becomes unnecessary, and the conductive connection is completed simply by mounting the light source 1 to the light source support 3, so that the connection workability can be improved. In particular, in the present embodiment, since the first connection portion 321 is also a pressure contact piece that is in pressure contact with the light source 1, connection work such as soldering is not required when the light source 1 is mounted on the substrate 2 through the light source support 3. Connection workability can be improved.

  6 to 8 show a third embodiment of the present invention, FIG. 6 is a perspective view of the light source device according to the present embodiment, and FIG. 7 is a view when the light source device of FIG. 6 is viewed from the direction of arrow D2. FIG. 8 is a front view when the light source device of FIG. 6 is viewed from the direction of the arrow D1, and is a view showing the substrate in cross section.

  The basic configuration of the light source device according to the present embodiment is the same as that of the first embodiment, but both the frame 12 constituting the light source 1 and the main body 31 constituting the light source support 3 have heat resistance. For example, both the conductive part 13 constituting the light source 1 and the conductive member (conductor) 23 constituting the light source support 3 are made of, for example, silver or gold. The first portion is that the substrate portion 21 of the substrate 2 is made of metal (for example, aluminum) and the land portion 22 and the protective layer 23 are laminated via an insulating layer 25 (see FIG. 8). This is different from the embodiment.

  Further, in the present embodiment, the light source 1 and the light source support 3 and the light source support 3 and the substrate 2 are soldered by, for example, reflow soldering means (in FIG. 6, the enclosed area S by the ellipse is illustrated in FIG. 7 and 8, reference numeral 4 is a soldering portion).

  Further, in the present embodiment, the main body 31 of the light source support 3 includes a heat radiating portion R having a continuous cross-sectional uneven shape, and the heat radiating portion R is set to have a cross-sectional uneven shape in order to increase the surface area of the main body 31. The heat transferred from the light source 1 to the main body 31 is efficiently radiated.

  Further, in the present embodiment, as shown in FIG. 8, a positioning part 312d made of, for example, a cylinder or a prism or a projecting part having a mixed shape is provided on the second surface 312 of the light source support 3, and this positioning part 312d. Is inserted into a positioning hole 26 provided in the substrate 2 to position the light source support 3 on the substrate 2.

  As described above, in the present embodiment, the heat radiation efficiency can be improved by providing the light source support 3 with the heat radiating portion R having a concavo-convex shape for radiating the heat of the light source 2 to provide the heat radiation function. In this embodiment, the heat radiating portion R is provided by setting a part of the light source support 3 to have a concavo-convex shape. However, a heat radiating member having a cross-sectional concavo-convex shape is separately prepared and joined to the light source support 3. A heat radiating portion R may be provided. Moreover, the shape of the thermal radiation part R and a thermal radiation member is arbitrary.

  In the present embodiment, the light source support 3 has the positioning portion 312d with respect to the substrate 2, so that the assembly workability can be improved. As long as the positioning part 312d can position the light source support 3, the number and structure of formation are arbitrary.

  FIG. 9 is a cross-sectional view showing a fourth embodiment of the present invention. In the light source device according to the present embodiment, a concave portion 350 is provided on the main body 31 of the light source support 3, and a light source is provided at the bottom of the concave portion 350. 1 is provided, and a reflecting portion 351 made of a metal vapor deposition layer such as aluminum is provided on the surface of the concave portion 350, that is, the inclined surface constituting the concave portion 350, and the light source 1 is irradiated with light from the light source 1. A light reflection function for reflecting light is added.

  According to the present embodiment configured as described above, by providing the light source support 3 with the reflection portion 351, it is possible to suppress the loss of light and efficiently illuminate the illumination target. In the present embodiment, the reflective portion 351 is a metal vapor deposition layer. However, even if the reflective portion 351 is provided by preparing a dedicated reflective member having a high light reflectance and covering this with the required portion of the light source support 3. good. In the present embodiment, the concave surface portion 350 is provided and the reflection portion 351 is provided on the surface thereof, but the shape of the three light source support bodies on which the reflection portion 351 is provided is arbitrary. In addition, you may set the reflection part 351 as a reflection part for light control which adjusts brightness and a color other than the specular reflection surface with favorable light reflectivity.

  FIG. 10 is a cross-sectional view showing a fifth embodiment of the present invention. In this embodiment, the light source device includes a light guide 5 that guides light of the light source 1 to an illumination object (not shown), and a light source support. 3 is provided with a light guide positioning part 352 that receives and positions the light receiving part 51 of the light guide 5, and reliably positions the light source 1 and the light receiving part 51 of the light guide 5 through the light guide positioning part 352. The light use efficiency of the light source 1 is increased. In the present embodiment, details of the conductive connection between the light source 1 and the light source support 3 and the conductive connection between the light source support 3 and the substrate 2 are omitted.

  According to the present embodiment configured as described above, the light source support 3 has the light guide positioning part 352 for positioning the light guide 5, so that the light source 1 and the light receiving part 51 of the light guide 5 can be reliably connected. Can be positioned. The light guide positioning unit 352 may have any structure as long as the light source 1 and the light guide 5 can be positioned.

  Although not shown as another embodiment of the present invention, a lens member that adjusts (condenses, diffuses, and deflects) light by transmitting light from the light source 1 is provided, and this lens member is attached and fixed to the light source support 3. Alternatively, a cover member that adjusts the color of light (toning, color change, color conversion) by transmitting light from the light source 1 may be provided, and the cover member may be fixed to the light source support 3. .

The perspective view which shows the light source device by the 1st Embodiment of this invention. The figure which shows a board | substrate with a cross section by the front view when the light source device of FIG. 1 is seen from arrow D1 direction. AA sectional drawing of FIG. BB sectional drawing of FIG. The principal part side view which shows the 2nd Embodiment of this invention. The perspective view of the 3rd Embodiment light source device of this invention. The front view when the light source device of FIG. 6 is seen from the arrow D2 direction. The figure which shows a board | substrate with a cross section by the front view when the light source device of FIG. 6 is seen from arrow D1 direction. Sectional drawing which shows the 4th Embodiment of this invention. Sectional drawing which shows the 5th Embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source 2 Board | substrate 3 Light source support body 4 Soldering location 5 Light guide 11 LED element 12 Frame body 13 Conductive part 14 Sealing body 21 Substrate part 22 Land part 23 Insulating layer 24 Hole part 25 Insulating layer 26 Positioning hole 31 Main part 32 Conductive member (conductor)
51 Light-receiving part 120 Recessed part 121 Light emitting surface 122, 123 Electrode part 124 Mounting surface 311 First surface 312 Second surface 312a Coupling part 312b Extending part 312c Engaging claw part 312d Positioning part 313 Third surface 314 Fourth Surface 315 Fifth surface 316 Holding portion 317 Position restricting portion 318 Extension portion 319 Claw portion 319a Inclined surface 320 Base portion 321 First connecting portion 322 Second connecting portion 350 Concave surface portion 351 Reflecting portion 352 Light guide positioning portion D1 , D2 Arrow R Heat sink S Enclosed area

Claims (10)

A light source support, which is disposed between a light source composed of a surface-mounted LED and a substrate for supplying power to the light source, supports the light source on the substrate and electrically connects the light source to the substrate. . A light source comprising a surface-mounted LED having a light irradiation surface, a substrate that supplies power to the light source, and a light source support that supports the light source on the substrate and is electrically connected to the substrate. Light source device. 2. The light source support according to claim 1, wherein a first surface facing the mounting surface of the light source and a second surface facing the substrate have a predetermined angle in the light source support. 2. The light source device according to 2. The light source support according to claim 1 or the light source device according to claim 2, wherein the light source and the light source support, or the light source support and the substrate are brought into pressure contact with each other by an elastic conductor. The light source support according to claim 1 or the light source device according to claim 2, wherein the light source support is provided with a holding part for holding the light source or a coupling part for coupling to the substrate. The light source support according to claim 1 or the light source device according to claim 2, wherein the light source support is provided with a heat radiating portion for radiating heat of the light source, or a heat radiating member is attached. The light source support is at least one of a reflection part that reflects light from the light source, a reflection part that reflects light from the light source, a lens member that adjusts light from the light source, and an adjustment member that adjusts the color of light from the light source. The light source support according to claim 1 or the light source device according to claim 2, wherein one of the light source supports is provided. The light source support according to claim 1 or the light source device according to claim 2, wherein the light source support supports the plurality of light sources and is electrically connected to the substrate. The light source support according to claim 1 or the light source device according to claim 2, wherein the light source support has a positioning portion for the substrate. The light source device according to claim 2, further comprising a light guide that guides light from the light source, wherein the light source support includes a light guide positioning unit that positions the light guide.

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