JP5985002B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device using a light emitting diode element.

  Various improvements have been made to realize LED light bulbs with a wide light distribution close to incandescent bulbs.

JP 2001-243807 A JP 2009-4130 A JP 2004-296245 A JP 2008-103112 A JP 2010-129300 A Japanese Patent Laid-Open No. 2008-077900 Japanese Patent Laid-Open No. 2005-514752 Registered Utility Model No. 3168673

  An object of this invention is to implement | achieve the illuminating device of wide light distribution using a light emitting diode element.

  An illumination device according to the present invention includes a substrate on which a light source is mounted, a lighting circuit substrate that lights the light source, and a light guide that is attached to the substrate so as to cover the light source, The content is hollowed out with a thickness equal to or greater than the width of the light source, and the light emitted from the light source is guided from the lower end surface of the light guide to the inside of the light guide.

  According to the present invention, the light guide attached to the substrate so as to cover the light source, the light guide remaining in a state where the thickness is not less than the width of the light source, the light emitted from the light source is transmitted from the lower end surface to the inside. Therefore, the light emitted from the light source can be completely guided to the light guide.

FIG. 3 is a structural diagram of the lighting device according to the first embodiment. FIG. 6 is a structural diagram of a lighting device according to a second embodiment. FIG. 3 is a structural diagram of the illumination device according to the first, second, and third embodiments. FIG. 6 is a structural diagram of a lighting device according to a fourth embodiment. FIG. 6 is a structural diagram of a lighting device according to a fifth embodiment. FIG. 6 is a structural diagram of a lighting device according to a fifth embodiment. FIG. 10 is a structural diagram of a lighting device according to a sixth embodiment. FIG. 10 is a structural diagram of a lighting device according to a sixth embodiment. Schematic of the optical path of the illuminating device of Embodiment 1. FIG. Schematic of the optical path of the illuminating device of Embodiment 2. FIG. Schematic of the optical path of the illuminating device of Embodiment 6. FIG.

Embodiment 1 FIG.
(1) 1st form (FIG. 1, FIG. 3 (a) (b), FIG. 9):
An LED substrate 3 on which an LED element 8 (light emitting diode element) is mounted is installed in a casing made of a polycarbonate translucent globe 1 covering the LED light emitting surface 31, an outer portion 6, and a base 7. A lighting circuit board (not shown) for lighting the LED is installed inside the outer portion 6 that forms the casing.

  The main body flat plate 51 on the surface of the outer shell 6 on the translucent globe 1 side is made of aluminum, and the LED substrate 3 on which the LED elements 8 are mounted is provided on the main body flat plate 51. The illuminating device main body 5 includes a lighting circuit board, an outer portion 6, a base 7, a main body flat plate 51, and the like.

  The translucent globe 1 has a hemispherical shape, and is provided with an overhanging portion that protrudes upward (light irradiation direction) (see FIG. 1). The translucent globe 1 is added with a diffusing agent that diffuses light. The translucent globe 1 is made of a resin to which a light diffusing agent is added. However, the translucent globe 1 may be frosted or coated with titanium oxide that diffuses and reflects light inside. Any method may be used as long as it transmits light and a part of it reflects and diffuses.

The surface of the LED substrate 3 is the z direction, and the central axis of the illumination device 100 is the x direction.
x direction: LED substrate 3 surface vertical (illumination device axis) direction z direction: LED substrate 3 surface horizontal direction

  The LED substrate 3 is made of aluminum, and four LED elements 8 are arranged on one surface (light emitting surface 31) of the LED substrate 3, on which two U-shaped light guides 9 ((a) in FIG. 3). ) Are arranged in parallel with the end portion facing down, and the two end portions are respectively stacked on the two LED elements 8 ((a) of FIG. 3).

  The light guide 9 is a U-shaped light pipe, and end portions (base portions) on both sides of the U-shape are end surfaces 91 that allow light to pass through (see FIG. 1). As shown in FIG. 3A, a pair of LED elements 8 a and a pair of LED elements 8 b are arranged on the light emitting surface 31. And the light guide 9a is attached so that each of a pair of LED element 8a may be arrange | positioned at each of the lower part of the end surface 91 of both sides. The light guide 9b is attached to each of the lower portions of the end faces 91 on both sides so that each of the pair of LED elements 8b is disposed. The light guide 9a and the light guide 9b are arranged in parallel.

  The light guide 9 is attached to the light emitting surface 31 of the LED substrate 3 so that the U-shaped end portion (end surface 91) covers the LED element 8. The light guide 9 takes in the light emitted from the LED elements 8 arranged below the end faces 91 on both sides of the U-shape into the light pipe from the U-shaped end (end face 91), and the center inside the light pipe Guide the light to the horizontal part. As shown in FIG. 1, the central horizontal portion of the U-shaped light guide 9 is a diffusion portion 10 that diffuses light, and a light diffusing agent is added thereto.

  The light guide 9 according to the present embodiment is a rod-type light pipe that is formed into a U-shape by forming a cylinder with a transparent material such as glass, for example. A light tunnel type light pipe composed of

  By applying a silicon adhesive around the LED element 8 and bonding the end of the light guide 9 to the LED element 8, the end surface of the U-shaped light guide 9 is stacked on the surface of the LED element 8. And fixed. Other adhesives may be used as long as light transmission from the LED element 8 to the lower end face of the light guide 9 is not blocked. In addition, the light guide 9 is fixed by using a method such as providing a recess in which the LED element 8 is fitted on the lower end surface of the light guide 9 and screwing the end surface other than the recess of the LED element 8 to the LED substrate 3. You may do it.

  FIG. 9 shows a schematic diagram of an optical path by the light guide 9 according to the present embodiment. The light emitted from the LED element 8 is guided to the diffusion unit 10 by the light guide 9 and is diffused by the diffusion unit 10 into, for example, K1, L1, M1,.

  Then, the light K1 emitted from the diffusing portion 10 of the light guide 9 is diffused into, for example, K11, K12, and K13 light by the light diffusing action of the translucent globe 1 when passing through the translucent globe 1. The Further, the light L1 emitted from the diffusing portion 10 of the light guide 9 is, for example, L11, L12, L13,... By the light diffusing action of the translucent globe 1 when passing through the translucent globe 1. Diffused into light. Similarly, the light M1 emitted from the diffusing portion 10 of the light guide 9 is also diffused into, for example, M11, M12, M13,.

  Thus, the light emitted from the LED element 8 is first diffused by the diffusing unit 10 into, for example, K1, L1, M1,..., And further diffused by the translucent globe 1. That is, the light of K1, L1, M1,... Is diffused to K11, K12, K13,..., L11, L12, L13, ..., M11, M12, M13,. Irradiated from.

  As described above, the light of the LED element 8 becomes an optical path like the solid line arrow and the dotted line arrow in FIG. 9 by the light guide 9 and the translucent globe 1, and realizes light distribution of 180 ° or more. More light can be distributed depending on the direction.

  As shown in FIG. 3B, three U-shaped light guides 9 may be used. In FIG. 3B, six LED elements 8 are mounted on the light emitting surface 31 of the LED substrate 3. In addition to (a) of FIG. 3, a pair of LED elements 8 c are arranged on the light emitting surface 31. And the light guide 9c is attached so that each of a pair of LED element 8c may be arrange | positioned at each of the lower part of the end surface 91 of both sides. The light guide 9a, the light guide 9b, and the light guide 9c are arranged in parallel. The light guide body 9a, the light guide body 9b, and the light guide body 9c are preferably arranged at equal intervals.

  The illuminating device 100 of this Embodiment consists of the board | substrate (LED board | substrate 3) with which the light source (LED element 8) was mounted, and the lighting circuit board which lights the said light source, and a U-shaped light guide on the said light source. In the illuminating device 100 in which a plurality of the light guides 9 are arranged, the light source is mounted on the lower surfaces (U-shaped end portions (end surfaces 91)) of the two base portions of the light guide 9.

  In the illumination device 100 according to the first embodiment, the light of the light source mounted on the lower surfaces of the two bases of the light guide 9 is guided near the center of the illumination device 100 by a plurality of U-shaped light guides 9. In addition, since the light is diffused over a wider range including the vertical and horizontal directions of the substrate surface of the light source, a wide light distribution can be obtained.

  Further, in the illumination device 100 of the first embodiment, the plurality of U-shaped light guides 9 are arranged in parallel.

  In the illuminating device 100 of this Embodiment 1, since the light guide 9 is arrange | positioned in parallel, a light distribution range becomes wide and it can further expand a light distribution range.

  Furthermore, in the lighting device 100 of the first embodiment, the U-shaped light guide 9 is processed to diffuse light in the horizontal portion (diffusion portion 10) of the pipe or is made of a material that diffuses light. It is characterized by being added.

  In the lighting device 100 according to the first embodiment, the light guide 9 has a processing for diffusing light (frost processing) or a material for diffusing light into the horizontal portion (diffusing portion 10) of the pipe. The diffusion effect is large, and the light distribution range can be further expanded.

Embodiment 2. FIG.
(2) Second embodiment (FIGS. 2, 3 (e), (f), FIG. 10):
As shown in FIG. 2 and FIG. 3 (e), four lower end surfaces 951 of a light guide body 95 having a shape in which two U-shapes are crossed at an intersection 11 are arranged at the apexes of a square. Arranged on the LED element 8. The rest of the configuration is the same as that of the first embodiment, and therefore, the same components as those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 3E, the light guide 95 according to the present embodiment has a shape in which two U-shapes are crossed at an intersection 11 in a cross shape. The inside of the light guide 95 is also communicated in a cross shape. The cross-shaped horizontal portion of the light guide 95 is a diffusion portion 10.

  The light guide 95 is attached to the light emitting surface 31 of the LED substrate 3 such that four end portions (end surface 951) (see FIG. 2) are respectively covered on the four LED elements 8. The light guide 95 takes in the light emitted from the LED element 8 disposed below the end surface 951 into the light pipe from the end surface 951 and guides it to the central horizontal portion (diffusion unit 10) inside the light pipe. A light diffusing agent is added to the diffusing portion 10.

  A schematic diagram of an optical path by the light guide 95 according to the present embodiment is shown in FIG. The light diffusion method shown in FIG. 10 is the same as the method described in FIG. 9 of the first embodiment. The light of the LED element 8 has an optical path as shown in FIG. 10 due to the light guide 95, and a light distribution of 180 ° or more can be realized and more light can be distributed in the z direction.

  As shown in FIG. 3 (f), a light guide 95 a having a shape in which three U-shapes intersect at an intersection 11 may be used. The light guide 95a shown in (f) of FIG. 3 has a shape in which the diffusing portion 10 extends in the circumferential direction more than the light guide 95 shown in (e) of FIG. Therefore, the light distribution improved in the vertical direction and the horizontal direction of the LED substrate 3 can be obtained in the entire circumferential direction of the lighting device 100.

  The illumination device 101 according to Embodiment 2 is characterized in that the plurality of U-shaped light guides 9 arranged intersect each other. Further, the U-shaped light guides 9 intersecting each other intersect each other at an intersection 11. The U-shaped light guides 9 intersecting each other intersect each other at the intersection 11 to form one light guide 95a.

  In the illuminating device 101 of this Embodiment 2, since the light guides 9 cross each other, the light is improved in the vertical direction and the horizontal direction of the light emitting surface 31 of the LED substrate 3 over the entire circumference of the illuminating device. Light distribution can be obtained in the entire circumferential direction of the lighting device 101.

Embodiment 3 FIG.
(3) Third embodiment (FIGS. 3C and 3D):
In the present embodiment, a method for configuring an illumination device using two U-shaped light guides 9d and 9e having different heights will be described.

  As shown in FIG. 3C, in the present embodiment, the U-shaped light guides 9d and 9e having different heights are crossed in a cross shape so that the two light guides 9d and 9e do not cross each other. . As shown in FIG.3 (c), the two end surfaces 91d of the light guide 9d are each arrange | positioned on the two LED elements 8 on a diagonal among the four LED elements 8 arrange | positioned at the square vertex. Further, the two end faces 91e of the light guide 9e are arranged on the remaining two LED elements 8, respectively. Other configurations are the same as those described in the first embodiment, and thus description thereof is omitted.

  By crossing U-shaped light guides 9d and 9e having different heights in a cross shape, the diffusion portion 10d of the light guide 9d and the diffusion portion 10e of the light guide 9e cross in a cross shape. Thereby, the spreading | diffusion part 10 (10d, 10e) becomes a shape which spreads in the circumferential direction more.

  According to the present embodiment, two U-shaped light guides 9 having different heights are combined, and the light guides are not formed in a cross shape. -Easy to manufacture.

  As shown in FIG. 3D, three U-shaped light guides 9d, 9e, and 9f having different heights are provided so that the three light guides 9 (9d, 9e, and 9f) do not intersect with each other. It may be used.

  In the lighting device according to the third embodiment, the U-shaped light guides 9 that intersect each other are different in height from each other and do not intersect at the intersection 11.

  In the illumination device according to the third embodiment, the light guides 9 that intersect each other have different heights and do not intersect at the intersection 11, so a U-shaped light guide 9 having a complicated shape is required. The processing cost can be reduced.

Embodiment 4 FIG.
(4) Fourth embodiment (FIG. 4):
Two lower end surfaces 912 of the spiral light guide 96 are stacked on the two LED elements 8. The spiral light guide 96 includes a spiral vertical part 910 (a part rising along the x axis) and a spiral turning part 911 (a part twisted spirally along the x axis). In the spiral light guide 96, except for the spiral vertical part 910, a light diffusing agent is added to the spiral turning part 911. Since other than that is the same as 1st Embodiment, the description is abbreviate | omitted.

  Titanium oxide that diffuses and reflects light is applied to the inner surface of the translucent globe 1 to form a light reflecting diffusion film 2.

  The illumination device 102 according to the fourth embodiment includes a substrate (LED substrate 3) on which a light source (LED element 8) is mounted and a lighting circuit substrate that lights the light source, and a spiral light guide on the light source. In the illuminating device 102 in which 96 is disposed, the light source is mounted on the lower surfaces (lower end surfaces 912) of the two base portions of the light guide 96.

  In the illumination device 102 according to the fourth embodiment, the light of the light source mounted on the lower surfaces (lower end surfaces 912) of the two bases of the light guide 96 by the spiral light guide 96 is near the center of the illumination device 102. The light is diffused over a wider range including the vertical direction and horizontal direction of the substrate surface (light emitting surface 31), so that a wide light distribution can be obtained.

  In addition, in the illumination device 102 according to the fourth embodiment, the spiral light guide 96 is processed to diffuse light over a part or the entire surface of the pipe, or a material that diffuses light is added. It is characterized by.

  In the illumination device 102 according to the fourth embodiment, the spiral-shaped light guide 96 is added with processing for diffusing light (frost processing) or a material for diffusing light on a part or the entire surface of the pipe. The diffusion effect is large, and the light distribution range can be further expanded.

Embodiment 5 FIG.
(5) Fifth embodiment (FIGS. 5 and 6):
In the illumination device 103 according to the present embodiment, twelve LED elements 8 are arranged in a circular shape on the light emitting surface 31 of the LED substrate 3 (see FIG. 6). A hemispherical hemispherical light guide 90 is stacked on the twelve LED elements 8 arranged in a circle. The hemispherical light guide 90 is in a state in which the contents are hollowed out, and the thickness L2 (see FIG. 6) of the hemispherical light guide 90 only needs to be equal to or greater than the width L1 of the LED element 8 (see FIG. 6).

  A resin added with a light diffusing agent is used for the hemispherical light guide 90. The rest is the same as the first embodiment. As shown in FIGS. 5 and 6, the lower end surface 913 of the hemispherical light guide 90 has a circular shape with a width L2. The lower end surface 913 of the hemispherical light guide 90 is attached so as to cover the 12 LED elements 8 arranged in a circle. The method of attaching the hemispherical light guide 90 is the same as the method described in the first embodiment.

  Light emitted from the twelve LED elements 8 is guided from the lower end surface 913 of the hemispherical light guide 90 to the entire hemispherical light guide 90. Since the thickness (width) L2 of the lower end surface 913 is larger than the width L1 of the LED element 8, the LED element 8 is completely covered by the lower end surface 913, and the light emitted from the LED element 8 does not leak, and the hemispherical light guide 90 can be guided to the inside.

  In the present embodiment, the hemispherical hemispherical light guide 90 is configured to cover the 12 LED elements 8, but the light guide may not be hemispherical. The light guide 9 may be, for example, a dome shape, a bell shape, a lion shape, a saddle shape, a mountain shape, a hump shape, a half egg shape, or a light bulb shape.

  The illuminating device 103 of this Embodiment is the translucent glove 1 which covers the board | substrate (LED board 3) in which the light source (LED element 8) was mounted, the lighting circuit board which lights the said light source, and the light emission surface 31 of a light source. A hemispherical light guide (hemispherical light guide 90) on a substrate provided on the plane of the illumination device 103 that joins the translucent globe 1 and the illuminating device body 5 to each other. The light source is mounted on the circumferential bottom surface (lower end surface 913) of the hemispherical light guide 90.

  According to the illumination device 103 of the present embodiment, a hemispherical light guide (hemispherical light guide 90) is arranged, and a light source is mounted on the circumferential bottom surface of the light guide (hemispherical light guide 90). As a result, since the entire hemispherical light guide (hemispherical light guide 90) emits light, light can be distributed over the entire area of the translucent globe 1 in the vertical direction and the circumferential direction.

Embodiment 6 FIG.
(6) Sixth embodiment (FIGS. 7, 8, and 11):
In the illuminating device 104 according to the present embodiment, as shown in FIGS. 7 and 8, a hemispherical globe light guide is formed on 12 LED elements 8 arranged in a circle around the LED substrate 3. The body 900 is loaded. The hemispherical globe light guide 900 also serves as the translucent globe 1. The thickness L3 from the inner surface 902 to the outer surface 901 of the hemispherical globe light guide 900 may be equal to or greater than the width L4 of the LED element 8 (see FIG. 8).

  The lower end surface 921 (lower end portion end surface) of the globe light guide 900 has a circular shape with a thickness (width) of L3. The lower end surface 921 of the globe light guide 900 is provided with 12 notches (12 recesses 903) toward the inside of the globe light guide 900, and the LED element 8 is fitted therein. Since the thickness (width) L3 of the lower end surface 921 is equal to or larger than the width L4 of the LED element 8, the LED element 8 is completely covered by the lower end surface 921, and the light emitted from the LED element 8 cannot leak. 900 can be guided to the inside.

  For the globe light guide 900, a resin added with a light diffusing agent is used. The rest is the same as the first embodiment.

  The light of the LED element 8 has an optical path as shown in FIG. 11 by the light guide 9, and can realize a light distribution of 180 ° or more, and can distribute a large amount of light in the z direction.

  The lighting device 104 of the present embodiment is characterized in that a hemispherical light guide (globe light guide 900) also serves as the translucent globe 1.

  According to the lighting device 104 of the present embodiment, the hemispherical light guide (the globe light guide 900) also serves as the translucent globe 1, so that the structure is simple and the hemispherical light guide is more widely used. It is possible to distribute light over the entire region in the vertical direction and the circumferential direction of the (globe light guide 900).

  According to lighting device 104 of the present embodiment, hemispherical light guide (globe light guide 900) is processed to diffuse light on its inner surface 902 or outer surface 901, or a material that diffuses light. It is characterized by being added.

  According to lighting device 104 of the present embodiment, hemispherical light guide (globe light guide 900) is processed to diffuse light on its inner surface 902 or outer surface 901, or a material that diffuses light. Since it is added, the diffusion effect is larger and the light distribution range can be further expanded.

  Although Embodiments 1 to 6 have been described above, these two or more embodiments may be combined and implemented. Alternatively, one of these embodiments may be partially implemented. Alternatively, these two or more embodiments may be partially combined.

  In the first to sixth embodiments, in a lighting device including a substrate on which a light source is mounted and a lighting circuit substrate that lights the light source, and a plurality of U-shaped light guides are disposed on the light source, The light source is mounted on the lower surface of the two bases of the light guide, and the example in which the plurality of U-shaped light guides intersect each other has been described.

  The U-shaped light guides intersecting each other have been described as an example of the lighting device intersecting each other at the intersection.

  In addition, the U-shaped light guides intersecting each other have been described as an example of the illumination device in which the heights of the respective light guides are different and do not intersect at the intersection.

  In addition, the U-shaped light guide has been described as an example of a lighting device in which light is diffused or a light diffusing material is added to the horizontal portion.

  Further, in an illuminating apparatus including a substrate on which a light source is mounted and a lighting circuit substrate that lights the light source, and a spiral light guide is disposed on the light source, the light source includes two light guides An example of a lighting device mounted on the lower surface of the base has been described.

  Further, the spiral type light guide has been described as an example of a lighting device in which light is diffused on a part or the entire surface of the pipe, or a material that diffuses light is added.

  Moreover, an example of the illuminating device provided with the translucent glove which covers the said light source was demonstrated.

  In addition, an example of an illumination device in which the light source is a light emitting diode has been described.

  DESCRIPTION OF SYMBOLS 1 Translucent globe, 2 Light reflection diffused film, 3 LED board, 8 LED element, 5 Illuminating device main body, 6 Outer part, 7 Base, 9 Light guide, 10 Diffusing part, 11 Crossing, 31 Light emitting surface, 51 Main body Flat plate, 90 hemispherical light guide, 91 end face, 95 light guide, 95a light guide, 96 light guide, 100, 101, 102, 103, 104 lighting device, 900 globe light guide, 901 outer surface, 902 inner surface , 903 recess, 910 spiral vertical part, 911 spiral swivel part, 912 lower end face, 913 lower end face, 921 lower end face, 951 end face.

Claims (7)

A substrate on which a light source is mounted;
A lighting circuit board for lighting the light source;
A light guide attached to the substrate so as to cover the light source , wherein the content is hollowed out leaving a certain thickness equal to or greater than the width of the light source, and at a position corresponding to the light source on the lower end surface A light guide having a notch formed therein;
With
The light source is disposed in the notch,
Inside to be guided Tei Ru illumination device of the light guide light emitted from the light source from the lower end surface formed the notch.   The light guide is
  Having the annular lower end surface;
  The notch is
  The lighting device according to claim 1, wherein the lighting device is formed in a row on the lower end surface. The light guide is
The lighting device according to claim 1, wherein the lighting device is attached to the substrate by an adhesive applied around the light source. The light guide is
The lighting device according to claim 1 or 2 attached to the substrate by being screwed around the light source in the substrate. The lightguide lighting device according to 請 Motomeko 1 Ru domed der in any one of 4. The said illuminating device is an illuminating device of any one of Claim 1 to 5 further provided with the translucent glove which covers the said light source. Wherein the light source lighting device according to any one from 請 Motomeko 1 Ru Oh the light emitting diode 6.

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