JP3193946U - Wide angle light emitting diode and light emitting device using the same - Google Patents

Abstract

A wide-angle light-emitting diode having an increased irradiation range and improved overall light emission efficiency and a light-emitting device using the same are provided.
A pair of metal sockets (11), a metal heat dissipating seat (12), and a rectangular case (13) are provided, and the pair of metal sockets are respectively installed on the front and rear sides of the metal heat dissipating seat. A rectangular cup 14 having an opening surrounding the periphery of the metal heat dissipating seat is formed in the upper half of the rectangular case, and the base 10 on which a part of the upper edge surface of the metal socket is exposed, and the metal heat dissipating seat It has a blue light emitting diode chip 20 to be installed, a sealing material 30 filled in the cup, and a sealing material adhesive 40 applied to the surface of the sealing material. Two first surface regions 511 that have a rectangular parallelepiped shape and are raised and symmetrical with each other in the longitudinal direction are formed on the top surface, and a second surface region 512 that is recessed between the two first surface regions is formed on the bottom surface. In addition, a flat third surface region 521 is formed, and a lens 50 in which a blue light emitting diode chip is located below the second surface region is provided.
[Selection] Figure 2

Description

  The present invention relates to a wide-angle light-emitting diode and a light-emitting device using the same, and more specifically, increases an irradiation range by increasing a light-emission angle range, reduces the number of light-emitting diodes, and improves overall light-emitting efficiency. The present invention relates to a wide-angle light emitting diode.

Light emitting diode technology is improving day by day and is widely applied to light emitting devices to provide illumination. The superiority or inferiority of illumination of the light emitting device is determined by the optical design of the light emitting diode, and the optical design is basically divided into a first optical system and a second optical system. This will be described in detail below.
(1) First optical system: In a light emitting diode mounting structure, a lens-shaped sealing material is covered with an LED chip and coupled to a pedestal, and the sealing material has a light distribution or light shape adjustment function. As a result, the sealing material becomes the first optical lens, and the generated light forms or light rays are distributed to form a fixed form, and the light emission angle is generally about 110 to 120 °.
(2) Second optical system: Different light distribution is required because it is applied as different illumination to light-emitting diode illumination. Therefore, the light distribution is adjusted by combining the second optical design. Thus, in the second optical design, the light after passing through the first optical lens is passed through one optical lens, so that it is called a second optical lens, and the optical performance of illumination is modified.

  The light emitting diode is designed with the first optical system or the second optical system, but the correlation between the first optical system or the second optical system designed between the light emitting diodes is ignored, and the mutual correlation is low. In this case, it has a great influence on the light emitting device. For example, since the light spots are concentrated as the intensity of light increases, the emission angle becomes smaller. However, with such light concentration, the arrangement interval of the light-emitting diodes must be within 1.5 cm, and more light-emitting diodes are used, which is disadvantageous for industrial development. Alternatively, the arrangement interval of the light emitting diodes becomes longer, the light distribution between the light emitting diodes becomes non-uniform, and a shadow region is created. Therefore, in order to reduce the cost of the light emitting device or improve the yield, a good optical design between the light emitting diodes is necessary, and this is not an optical design by a single light emitting diode.

  Therefore, the present inventor considered that the above-mentioned drawbacks could be improved, and as a result of intensive studies, he came up with a proposal for the present invention to improve the problem reasonably and effectively.

  The present invention has been made in view of such conventional problems. In order to solve the above problems, the present invention has as its main object to provide a wide-angle light emitting diode and a light emitting device thereof. That is, the first optical system and the second optical system are continuously refracted in the light emitting diode, the light distribution that intersects and overlaps between the light emitting diodes is realized, the arrangement interval of the light emitting diodes is reduced, and the number of the light emitting diodes used. Furthermore, the cost reduction effect of installing the light emitting diode in the light emitting device is promoted.

  Furthermore, it is another object of the present invention to provide a wide-angle light emitting diode and a light emitting device thereof. In other words, the first optical system of the light-emitting diode is strengthened, the light intensity is increased by centrally emitting light, and the second optical system continuously performs refraction of the first optical system, generating a uniform light distribution. In addition, when the light emitting diode is installed in the light emitting device, the yield is improved.

A wide-angle light-emitting diode according to the present invention includes a pedestal, a blue light-emitting diode chip, a sealing material, a sealing material adhesive, and a lens. The pedestal is composed of a pair of metal sockets, a metal heat sink and a rectangular case, and the pair of metal sockets are respectively installed on the front and rear sides of the metal heat sink, and the lower half of the rectangular case has the metal heat sink and the metal socket. Surrounded and localized, the upper half of the rectangular case forms a rectangular cup with an opening that surrounds the periphery of the metal heat sink, and the bottom edge of the metal heat sink and the metal socket is exposed. A part of the upper edge surface is exposed. The blue light emitting diode chip is installed on a metal heat dissipating seat, and an electrode is connected to the metal socket by a conducting wire. The sealing material is filled in the cup, and seals the blue light emitting diode chip and the conductive wire. The sealing material adhesive is applied to the surface of the sealing material. The lens has a rectangular parallelepiped shape and is bonded to the sealant adhesive, and is formed on the top surface with two first surface regions that are raised and symmetrical with each other in the longitudinal direction, and between the two first surface regions. A second surface region that is recessed at a bottom surface, a flat third surface region is formed on the bottom surface, and has a refractive index smaller than the refractive index of the sealing material, below the second surface region and the first surface A blue light emitting diode chip is installed between the regions.
The blue light emitted from the blue light-emitting diode chip passes through the sealing material, then enters the third surface region, becomes a deflected blue light beam, is guided to the planned light emission range of the first surface region, and passes through the first surface region. By doing so, it is projected at a wide angle.

A light-emitting device according to the present invention includes a plurality of wide-angle light-emitting diodes according to claim 1, a circuit board, and an LED strip. The circuit board has a plurality of wide-angle light-emitting diodes electrically connected to the surface, and the distance between the plurality of wide-angle light-emitting diodes is 1.5 cm or more. The LED strip has a semi-cylindrical shape and is composed of a yellow fluorescent layer as a thin inner layer and a light mixing layer as a thick outer layer. The LED strip covers a wide-angle light emitting diode and is coupled to a circuit board.
After the circuit board is energized, the blue light beam that intersects and overlaps between the wide-angle light emitting diodes is applied to the LED strip, passes through the yellow fluorescent layer of the LED strip, is guided to the light mixing layer, and produces uniform white light. Converted.

  According to the present invention, in the first optical system, the blue light emitted from the blue light emitting diode chip is transmitted through the sealing material, and the blue light is condensed on the side surface combined with the concave groove, and the blue light is strengthened. And then deflected into the lens to form a blue light distribution. In the second optical system, the refracted light of the blue light continued from the first optical system is made into a more uniform blue light, forming a blue light distribution that intersects and overlaps between the light emitting diodes, and the light emitting diodes are installed in the light emitting device. In this case, the number of light emitting diodes used is reduced by reducing the arrangement interval of the light emitting diodes. In addition, the distribution state of the blue light is enhanced, and further, when the light emitting diode is installed in the light emitting device, the cost can be reduced and the yield can be improved.

1 is a perspective view showing a wide-angle light emitting diode according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line 2-2 in FIG. FIG. 3 is a cross-sectional view of FIG. The schematic diagram which shows distribution of a blue ray in the longitudinal direction of the wide angle type light emitting diode by one Embodiment of this invention. The schematic diagram which shows distribution of a blue ray in the transversal direction of the wide angle type light emitting diode by one Embodiment of this invention. The perspective view which shows the light-emitting device by one Embodiment of this invention. 1 is a cross-sectional view illustrating a light emitting device according to an embodiment of the present invention. 8-8 sectional view of FIG.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims of utility model registration. In addition, all the configurations described below are not necessarily essential requirements of the present invention.

(One embodiment)
Hereinafter, Embodiment 1 is demonstrated based on FIGS. In this embodiment, the wide-angle light-emitting diode 60 and the light-emitting device 90 of the present invention include the following four types of members.

  (1) The pedestal 10 is composed of a pair of metal sockets 11, a metal heat dissipating seat 12, and a rectangular case 13. The metal sockets 11 are respectively installed on the front and rear sides of the metal heat dissipating seat 12, and below the rectangular case 13. The metal heat radiating seat 12 and the metal socket 11 are surrounded and positioned by the half, and the periphery of the metal heat radiating seat 12 is surrounded by the upper half to form the cup 14 having a rectangular opening. Further, the bottom edge surfaces of the metal heat radiating seat 12 and the metal socket 11 are exposed, and a part of the upper edge surface of the metal socket 11 is also exposed.

  (2) The blue light emitting diode chip 20 is installed on the metal heat dissipating seat 12, and the electrodes are connected to the metal socket 11 by conducting wires 21. In the present embodiment, the metal heat dissipating seat 12 is a stepped concave groove, the surface of the concave groove is formed in a stepped shape with a reflecting surface, the blue light emitting diode chip 20 is placed thereon, and the blue light emitting diode chip is mounted. The blue light B radiated from the side surface 20 is reflected and concentrated through the concave groove, the light intensity is enhanced, and the outward inclination angle of the side of the concave groove is 40 to 50 °. Most preferred.

  (3) The sealing material 30 is filled in the cup 14, and the blue light emitting diode chip 20 and the conductive wire 21 are sealed to complete the primary mounting. In this embodiment, the refractive index of the sealing material is 1.5 or more, and a sealing material adhesive 40 made of silica gel may be applied to the surface of the sealing material 30.

  (4) The lens 50 has a rectangular parallelepiped shape and is bonded to the sealant adhesive 40 to complete the secondary mounting. The longitudinal direction of the rectangular parallelepiped is set as a lateral direction, and a first surface region 511 having two raised and symmetrical surfaces is formed on the lateral upper surface 51, and a second surface region 512 contracting between the first surface region 511. And has a flat third surface region 521 on the bottom surface 52 in the lateral direction. The refractive index of the lens is 1.4 or more, and the refractive index of the lens 50 is smaller than the refractive index of the sealing material 30. In addition, the blue light emitting diode chip 20 is disposed between the second surface region 512 and the first surface region 511, combined with the raised curvature of the first surface region 511, and the third surface region 521. Is the center of curvature, the radius of curvature is set to 1.2 to 1.4 mm, and the blue light B passes through the first surface region 511 and is emitted at an angle of 140 to 160 °.

  4 and 5 are diagrams showing the distribution of blue light in the longitudinal direction and the distribution of blue light in the short direction of the wide-angle light emitting diode 60. FIG. First, after the blue light B emitted from the blue light emitting diode chip 20 is transmitted through the sealing material 30, the blue light B continues to enter the third surface region 521 to generate a polarized blue light L, The blue light L is condensed in a predetermined emission range R of the first surface region 511, and the blue light L is transmitted through the first surface region 511 and is emitted at a wide angle θ.

    The light-emitting device 90 shown in FIGS. 6, 7 and 8 is electrically connected to the above-described wide-angle light-emitting diode 60 and a plurality of wide-angle light-emitting diodes 60, and the distance between the wide-angle light-emitting diodes 60 is 1. A circuit board 70 having a thickness of 5 cm or more and a half-cylindrical yellow fluorescent layer 81 and a thick outer light-mixing layer 82, and covering the wide-angle light-emitting diode 60 and covering the circuit board 70 The LED strip 80 is coupled. Accordingly, after the circuit board 70 is energized, the blue light L that intersects and overlaps the wide-angle light emitting diodes 60 is emitted to the LED strip 80, and the blue light L is emitted from the yellow fluorescent layer of the LED strip 80. 81 to the light mixing layer 82 is excited to go to the light mixing layer 82 to be converted into white light W that is uniformly emitted. In this embodiment, the wide-angle light emitting diode 60 employs yttrium aluminum garnet (YAG) yellow fluorescent powder in addition to the blue light emitting diode, and excites yellow fluorescent powder using blue light. However, the present invention is not limited to this.

  As described above, the wide-angle light-emitting diode 60 interacts with the light-emitting diode that increases the light-emitting angle of the light-emitting diode and improves the light efficiency by 15%, and with the stepped concave groove and the second optical system of the lens 50. Born. For example, the blue light B emitted from the blue light emitting diode chip 20 is concentrated upward by the concave groove, the intensity of the blue light L is strengthened, and a more uniform blue light L is generated using the second optical system design. By the structure of the blue light L, the yellow fluorescent layer 81, and the light mixing layer 82, the light is converted into more efficient white light. In addition, the secondary mounting structure is used to reduce the peeling of the light emitting diode cup 14 and the sealing material 30, thereby extending the life of the light emitting diode in a harsh environment. Therefore, a complementary synergistic effect is obtained by the wide-angle light emitting diode 60, the light emitting device 90, and the secondary mounting structure.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

10 pedestal,
11 Metal socket,
12 Metal heat sink,
13 Rectangular case,
14 cups,
20 Blue light emitting diode chip,
21 conductor,
30 sealing material,
40 Sealant adhesive,
50 lenses,
51 top surface,
511 first surface region,
512 second surface region,
52 bottom,
521 third surface region,
60 wide angle light emitting diode,
70 circuit board,
80 LED strip,
81 yellow fluorescent layer,
82 Light mixing layer,
90 light emitting device,
B Blue light,
L Blue ray,
R planned emission range,
W White light,
θ Wide angle.

Claims (6)

A pair of metal sockets, a metal heat dissipating seat and a rectangular case are provided, and the pair of metal sockets are respectively installed on the front and rear sides of the metal heat dissipating seat, and the lower half of the rectangular case is the metal heat dissipating seat and the metal A rectangular cup having an opening surrounding the metal heat dissipating seat is formed with the upper half of the rectangular case surrounding the socket, and a bottom edge surface of the metal heat dissipating seat and the metal socket is exposed. A base on which a part of the upper edge surface of the metal socket is exposed,
A blue light-emitting diode chip installed on the metal heat dissipating seat, and an electrode connected to the metal socket by a conductive wire;
Filled in the cup, a sealing material for sealing the blue light emitting diode chip and the conductive wire,
A sealing material adhesive applied to the surface of the sealing material;
A rectangular parallelepiped and bonded to the sealant pressure-sensitive adhesive, on the top surface, between the two first surface regions that are raised and symmetrical with each other in the longitudinal direction, and between the two first surface regions A concave second surface region is formed, a flat third surface region is formed on the bottom surface, the refractive index is lower than the refractive index of the sealing material, and the blue surface is below the second surface region. A lens on which the light-emitting diode chip is located,
The blue light emitted from the blue light emitting diode chip passes through the sealing material, and then enters the third surface region, becomes a deflected blue light beam, is guided to a predetermined light emission range of the first surface region, and A wide-angle light-emitting diode that is projected at a wide angle by transmitting through one surface region. A plurality of wide-angle light emitting diodes according to claim 1;
A plurality of the wide-angle light emitting diodes are electrically connected to the surface, and a distance between the plurality of wide-angle light emitting diodes is 1.5 cm or more,
An LED strip which is a half cylinder and is composed of a yellow fluorescent layer which is a thin inner layer and a light mixing layer which is a thick outer layer, covers the wide-angle light emitting diode and is coupled to the circuit board. Prepared,
After the circuit board is energized, the blue light beam that intersects and overlaps between the wide-angle light emitting diodes is applied to the LED strip, passes through the yellow fluorescent layer of the LED strip, and is guided to the light mixing layer. The light-emitting device is converted into uniform white light. The metal heat dissipating seat is a stepped concave groove on which the blue light emitting diode chip is placed,
3. The light emitting device according to claim 1, wherein blue light emitted from a side surface of the blue light emitting diode chip is reflected and concentrated via the metal heat dissipating seat.   The light emitting device according to claim 1 or 2, wherein an outward inclination angle of a side of the concave groove is 40 to 50 °. The sealing material has a refractive index of 1.5 or more,
The light-emitting device according to claim 1, wherein a refractive index of the lens is 1.4 or more. The raised curvature of the first surface region has a predetermined point of the third surface region as the center of curvature and a radius of curvature of 1.2 to 1.4 mm.
3. The light emitting device according to claim 1, wherein the blue light passes through the first surface region and is projected at an angle range of 140 to 160 °.

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