JP2008277158A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use light emitting elements such as light emitting diodes for a wide range of applications as light sources. <P>SOLUTION: Semicylindrical common outer lenses 3 are faced to emission surfaces 22 of aligned light emitting elements 2. The light emitting elements 2 are aligned in a lattice-like form. The outer lenses 3 are faced to the alignments of the light emitting elements 2 in two directions orthogonal to each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to a technical field related to an illumination device using a light emitting element such as a light emitting diode (LED) as a light source.

  In recent years, attempts have been made to use semiconductor light-emitting elements such as light-emitting diodes, which have been mass-produced at low cost, as light sources for various lighting devices. For a light emitting element having a high directivity of light irradiation such as a light emitting diode, the directivity is adjusted by making an outer lens face the light emitting surface.

Conventionally, as a lighting device technology using a light emitting element such as a light emitting diode as a light source, for example, those described below are known.
Japanese Unexamined Patent Publication No. 63-80402 Japanese Laid-Open Utility Model Publication No. 6-44157 discloses a lighting device in which a common outer lens having a semi-cylindrical shape (face shape) faces a light emitting surface of aligned light emitting elements.

  The illumination device according to Patent Document 1 synthesizes light irradiated spotwise from the light emitting surface of each light emitting element by an outer lens, and extends the light irradiation in the alignment direction of the light emitting elements (length direction of the outer lens). It is adjusted to a belt shape.

  In the illumination devices according to Patent Documents 1 and 2, although the light irradiation is sufficiently expanded in the length direction of the outer lens, the light irradiation is not sufficiently expanded in the direction orthogonal to the length direction of the outer lens, Since light cannot be irradiated uniformly in all directions of the light source, there is a problem that usage is restricted.

  The present invention has been made in consideration of such problems, and an object of the present invention is to provide an illumination device that can be used for a wide range of applications using a light emitting element such as a light emitting diode as a light source.

  In order to solve the above-described problems, the lighting device according to the present invention employs means described in each of the claims.

  That is, in the illumination device in which the semi-cylindrical common outer lens faces the light emitting surface of the aligned light emitting elements, the light emitting elements are aligned in a lattice shape, and the outer lens is in at least two different directions of the light emitting elements. It is faced to alignment of.

  With this means, by utilizing the characteristic that light irradiation is sufficiently expanded in the length direction of the outer lens, the length direction of the outer lens is set in at least two different directions of the lattice alignment of the light emitting elements. Irradiate light uniformly in all directions of the light source.

  According to claim 2, in the illumination device according to claim 1, the outer lens has a square unit surface having a continuous semi-cylindrical shape facing a plurality of rows aligned in one direction of the light emitting elements, and the other direction of the light emitting elements. A semi-cylindrical continuous square unit surface facing a plurality of aligned rows is adjacent.

  In this means, the outer lens is made to be a square unit surface having a continuous semi-cylindrical shape and adjacent to each other in different directions, thereby making light irradiation in all directions of the light source more uniform.

  According to a third aspect of the present invention, in the illumination device according to the second aspect of the present invention, both unit surfaces of the outer lens are integrally formed.

  By this means, the entire outer lens is integrally molded, thereby making it possible to adopt a synthetic resin material injection molding technique or the like as a manufacturing means.

  According to a fourth aspect of the present invention, in the illuminating device according to the second aspect, the outer lenses are combined in such a manner that the unit surfaces are changed in direction by the same member.

  In this means, each unit surface of the outer lens is made the same member, thereby making it possible to adopt an extrusion molding technique, a cutting technique or the like of the synthetic resin material as a manufacturing means.

  The illuminating device according to the present invention utilizes the characteristic that light irradiation is sufficiently expanded in the length direction of the outer lens, so that the length direction of the outer lens is set in at least two directions different from each other in the grid-like alignment of the light emitting elements. By setting, light is emitted uniformly in all directions of the light source, so that there is an effect that a light emitting element such as a light emitting diode can be used for a wide range of applications as a light source.

  Hereinafter, the best mode for carrying out a lighting device according to the present invention will be described with reference to the drawings.

  FIGS. 1-5 shows the 1st example of the best form for implementing the illuminating device which concerns on this invention.

  In the first example, as shown in FIG. 1, a rectangular shape that is substantially the same shape as the mounting substrate 1 with respect to the light emitting element 2 that is a light emitting diode that is a light source arranged in a grid (matrix shape) on a rectangular mounting substrate 1. The outer lens 3 integrally molded with the 3 faces each other.

  The mounting substrate 1 is provided with a mounting structure for mounting the light emitting elements 2 in a grid pattern on the mounting surface 11, and four mounting screws 4 for mounting the outer lens 3 are screwed onto the longitudinal side edge. The screw hole 12 is perforated.

  The light emitting element 2 is formed in a rectangular chip shape (block shape), the lower surface is a mounting surface 21 mounted on the mounting surface 11 of the mounting substrate 1, and the upper surface is a light emitting surface 22 that emits light. Yes. The arrangement of the light emitting elements is 192 in total of 8 × 24.

  In the outer lens 3, a substantially semi-cylindrical lens portion 31 is continued through a flat plate-like connecting portion 32, and four insertion holes 33 through which attachment screws 4 for attachment to the mounting substrate 1 are inserted at the longitudinal edge. Is provided with a perforated flange portion 34. As shown in FIGS. 3 and 4, the lens portion 31 has a chord surface 31 a that is the lower surface facing the light emitting surface 22 of the light emitting element 2, and an arc surface 31 b that is the upper surface is an irradiation surface that irradiates light. .

  In the outer lens 3, the eight lens portions 31 and the seven connecting portions 32 constitute square unit surfaces A and B that face a total of 64 light-emitting elements 2 of 8 × 8, so that three units are formed. The surfaces A and B are adjacent to each other to form a rectangle. The lens portions 31 on the unit surfaces A at both ends have a length direction (semi-cylindrical axial direction) set in the left-right direction of the drawing. The lens unit 31 in the central unit surface B has a length direction set in the vertical direction of the drawing. That is, on the unit surfaces A and B, as shown in FIG. 5, the alignments X and Y of the light emitting elements 2 facing the lens unit 31 are orthogonal to each other. The outer lens 3 adjacent to the unit surfaces A and B can be manufactured by injection molding a synthetic resin material such as polycarbonate having good light transmission.

  The mounting substrate 1 and the outer lens 3 are assembled by inserting the mounting screw 4 inserted through the insertion hole 33 of the outer lens 3 into the ring-shaped spacer 5 and then screwing and tightening the screw into the screw hole 12 of the mounting substrate 1. . In addition, by adjusting the thickness of the spacer 5, it is possible to change the distance between the light emitting surface 22 of the light emitting element 2 and the lens portion 31 of the outer lens 3 and adjust the irradiation area of the light from the outer lens 3. is there.

  The mounting substrate 1 assembled with the outer lens 3 is attached to a casing to which a heat radiating body is attached via an insulating substrate, a wiring substrate and the like (not shown). The casing is covered with a translucent cover that covers the outer lens 3 side. As a result, commercialization as a lighting device is completed.

  In the light irradiation of the first example, although the light irradiation is sufficiently expanded in the length direction of the semi-cylindrical lens portion 31 of the outer lens 3, the light irradiation is sufficiently performed in the direction orthogonal to the length direction. Although there is a difference in orthogonal irradiation widths a and b due to the characteristic that they are not expanded, the irradiation widths a and b are positioned in the reverse direction on the adjacent unit surfaces A and B (see FIGS. 2 to 4). ). Therefore, by combining the irradiation widths a and b of both unit surfaces A and B, light can be irradiated uniformly in all directions of the light source.

  For this reason, although the light emitting element 2 which consists of a light emitting diode with high directivity of light irradiation is used as a light source, it can be used for a wide range of applications.

  The first example can be configured by improving the alignment of the light emitting elements 2 and the structure of the outer lens 3, and the outer lens 3 can be manufactured by a synthetic resin injection molding technique, so that it is inexpensive and easy to manufacture. Is possible.

  As a specific use of the first example, there is a fish collecting lamp that collects fish having positive mobility with respect to light by irradiation.

  When used as a fish-collecting light, the irradiation area is small even if the number of installation bases is reduced when a large number of units must be installed at different irradiation angles because the irradiation area is narrow despite the sufficient amount of light. Therefore, it is possible to reduce the equipment cost and operation cost (power consumption).

  FIG. 6 shows a second example of the best mode for carrying out the lighting device according to the present invention.

  In the second example, the outer lens 3 is formed by combining unit surfaces A and B composed of three separate surfaces. However, the unit surfaces A and B are formed as the same member and combined in different directions.

  According to the second example, a synthetic resin material such as polycarbonate having good light transmittance is extruded to form an extruded material P in which the lens portion 31 and the connecting portion 32 of the outer lens 3 are continuous in a long length. The outer lens 3 composed of square unit surfaces A and B can be manufactured. Therefore, as compared with the first example, the mold for molding the outer lens 3 is simplified, and the manufacturing becomes cheaper and easier.

  In the outer lens 3 of the second example, the unit surfaces A and B can be individually attached to the mounting substrate 1, or the unit surfaces A and B can be integrated with a frame or the like and then attached to the mounting substrate 1. it can.

  FIG. 7 shows a third example of the best mode for carrying out the lighting device according to the present invention.

  In the third example, instead of the alignment Y of the light emitting elements 2 of the first example, the lens portion 31 of the outer lens 3 faces the alignment Z of the light emitting elements 2 having an angle of 45 degrees with respect to the alignment X of the light emitting elements 2. I am letting.

  According to the third example, as compared with the first example, the irradiation of light around the light source can be adjusted more precisely.

  As described above, in addition to the illustrated examples, the unit surfaces A and B of the outer lens 3 can be adjacent in a staggered manner. In addition, it is possible to configure irradiation surfaces of various shapes with four or more unit surfaces A and B of the outer lens 3.

  Furthermore, the present invention can be applied to a light emitting element 2 such as a semiconductor system having high directivity of light irradiation other than the light emitting diode.

  Since the illuminating device according to the present invention does not affect the exterior structure such as the casing and the cover, the exterior structure can be freely selected for applications such as outdoors, indoors, and underwater, and the application can be expanded.

It is a perspective view of the decomposition | disassembly state of the 1st example of the best form for implementing the illuminating device which concerns on this invention. FIG. 2 is an assembly state diagram of FIG. 1. It is a longitudinal cross-sectional view of FIG. FIG. 4 is a longitudinal sectional view of FIG. 2 along a line orthogonal to FIG. 3. FIG. 3 is a simplified plan view of a main part of FIG. 2. It is a perspective view which shows the manufacture example of the 2nd example of the best form for implementing the illuminating device which concerns on this invention. It is the simplified top view of the 3rd example of the best form for implementing the illuminating device which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting board 2 Light emitting element 22 Light emitting surface 3 Outer lens 31 Lens part A, B Unit surface

Claims (4)

  In a lighting device in which a semi-cylindrical common outer lens is opposed to a light emitting surface of the aligned light emitting elements, the light emitting elements are aligned in a lattice shape, and the outer lens is opposed to alignment of at least two different directions of the light emitting elements. A lighting device characterized by that.   2. The illuminating device according to claim 1, wherein the outer lens faces a square unit surface having a continuous semi-cylindrical shape facing a plurality of rows aligned in one direction of the light emitting elements and a plurality of rows aligned in the other direction of the light emitting elements. A lighting device characterized in that a semi-cylindrical continuous square unit surface is adjacent to each other.   3. The illumination device according to claim 2, wherein both unit surfaces of the outer lens are integrally formed.   3. The illuminating device according to claim 2, wherein each unit surface is combined with the outer lens being changed by the same member.

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