JP5457576B1 - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of wide-angle irradiation.
A lighting device according to the present invention has a light emitting element and an inner wall that reflects direct light from the light emitting element. Two axes orthogonal to the optical axis 40 of the light emitting element 50 and orthogonal to each other are defined as a vertical axis 36 and a horizontal axis 38. The inner wall 64 has two protrusions 68 that face each other with the light emitting element 50 interposed therebetween as viewed from the direction of the optical axis 40. The protrusion 68 has a top portion 70 on the vertical axis 36 when viewed from the direction of the optical axis 40, and the distance M1 between the top portion 70 and the horizontal axis 38 is the shortest, and is separated from the top portion 70 along the horizontal axis 38. Therefore, the distance M2 from the horizontal axis 38 becomes longer.
[Selection] Figure 5

Description

  The present invention relates to a lighting device that enables wide-angle irradiation.

  2. Description of the Related Art Illumination devices that use light emitting elements (light emitting diodes) as light sources are rapidly spreading as alternative illumination devices for conventional fluorescent lamps and incandescent bulbs. An illuminating device using a light emitting element as a light source has low power consumption and a long life, and thus has been used in various illuminating devices so far.

  As an illuminating device used outdoors, since it can reduce the labor and cost of replacement, for example, an illuminating device for a signboard in which a light emitting element is installed at the bottom of a concave reflecting surface has been proposed (for example, Patent Document 1, 2).

  The concave reflecting surface of such an illuminating device is usually configured so as to increase the intensity of irradiation light by condensing so that light emission of the light emitting element does not spread. Therefore, the illumination device has a substantially circular irradiation range on the irradiation surface. For this reason, for example, in the case of illuminating a horizontally long signboard, the illumination range is made to correspond to the landscape orientation by arranging a plurality of lighting devices along the signboard.

  In addition, since a rectangular signboard is usually irradiated, there is a chipping that does not irradiate in all directions in a circular irradiation range, so an illuminating device will be arranged to illuminate a wider irradiation range than the signboard, at least vertically The light that was not illuminated on the sign was wasted.

JP 2010-198954 A JP 2010-198955 A

  The objective of this invention is providing the illuminating device which enabled wide angle irradiation.

The illumination device according to the present invention is
A light emitting element;
A reflection part having a wall part for reflecting direct light from the light emitting element;
Have
When two axes orthogonal to the optical axis of the light emitting element and orthogonal to each other are a vertical axis and a horizontal axis,
The wall has two protrusions facing each other across the light emitting element as seen from the direction of the optical axis,
The surface of the protrusion has a top on the vertical axis, and the distance from the optical axis is the shortest at the top, and the distance from the horizontal axis increases as the distance from the top increases along the horizontal axis. The
The reflective portion is
Inclined surfaces facing each other across the light emitting element along the horizontal axis;
A rising surface extending from an upper surface of the light emitting element to an end of the inclined surface;
Further comprising
The rising surface reflects direct light from the light emitting element,
The inclined surface does not receive direct light from the light emitting element .

According to the illuminating device of the present invention, the direct light emitted from the light emitting element in the direction of the vertical axis is reflected by the protrusion in the direction of the horizontal axis, thereby efficiently irradiating wider in the direction of the horizontal axis than the direction of the vertical axis. A range can be obtained. Furthermore, by doing in this way, the illumination device according to the present invention efficiently uses the light in the horizontal axis direction by not applying the light emitted from the light emitting element in the horizontal axis direction to the inclined surface. Can do.

  In the lighting device according to the present invention, the surface of the protrusion may be a curved surface.

  By doing in this way, the illuminating device concerning this invention can obtain a gentle light distribution curve in the direction of a horizontal axis.

  In the illumination device according to the present invention, the curved surface may be a quadratic curve as viewed from the direction of the optical axis.

  By doing in this way, the illuminating device concerning this invention can obtain a gentle light distribution curve in the direction of a horizontal axis.

In the lighting device according to the present invention,
The protrusion may have a second width that is wider than a first width of the light emitting element in a first direction along the horizontal axis.

  By doing in this way, since the illuminating device concerning this invention can reflect the light radiate | emitted from the light emitting element to the direction of the vertical axis | shaft to the direction of a horizontal axis, it is more efficient than the direction of a vertical axis. A wide irradiation range in the direction can be obtained.

  In the illumination device according to the present invention, the top of the protrusion may be adjacent to the light emitting element.

  By doing in this way, the illuminating device according to the present invention efficiently reflects the light emitted from the light emitting element in the direction of the vertical axis on the protrusions before spreading, so that the direction of the horizontal axis is higher than the direction of the vertical axis. A wide irradiation range can be obtained.

In the lighting device according to the present invention ,
A plurality of the light emitting elements and the protrusions are arranged along the first direction,
The wall portion may have a connection portion that connects the adjacent protrusions and is at least as high as the protrusion.

  By doing in this way, the illuminating device concerning this invention can reflect the light radiate | emitted between a projection part in the direction of a horizontal axis with a connection part.

It is a perspective view which shows the whole illuminating device concerning one Embodiment of this invention. It is a front view of the illuminating device concerning one Embodiment of this invention. It is AA sectional drawing in FIG. It is a perspective view which shows the reflection member of the illuminating device concerning one Embodiment of this invention. It is a front view which shows the reflection member and light emitting element of the illuminating device concerning one Embodiment of this invention. It is BB sectional drawing in FIG. It is CC sectional drawing in FIG. It is a schematic diagram which shows the relationship between the irradiation range of the 1/2 beam angle and projection part of the illuminating device concerning one Embodiment of this invention. It is a top view which shows the shape of the projection part concerning other embodiment. 6 is a plan view schematically showing the structure of a reflective member of Comparative Example 1. FIG. 3 is a longitudinal section schematically showing the structure of a reflective member of Comparative Example 1. 10 is a plan view schematically showing the arrangement of light emitting elements of Comparative Example 2. FIG. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of Example 1. FIG. 6 is a diagram illustrating light distribution characteristics in a first direction X of Example 1. FIG. FIG. 6 is a diagram illustrating light distribution characteristics in a second direction Y of Example 1. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of the comparative example 1. 6 is a diagram illustrating light distribution characteristics in a first direction X of Comparative Example 1. FIG. 6 is a diagram illustrating light distribution characteristics in a second direction Y of Comparative Example 1. FIG. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of the comparative example 2. 6 is a diagram showing light distribution characteristics in a first direction X of Comparative Example 2. FIG. 10 is a diagram showing light distribution characteristics in a second direction Y of Comparative Example 2. FIG. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of the comparative example 3. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of Example 2. FIG. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of Example 3. FIG. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of Example 4. FIG. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of Example 5. FIG. It is a figure which shows the illumination intensity distribution in the to-be-irradiated surface of Example 6. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

An illumination device according to an embodiment of the present invention includes a light emitting element and a reflecting portion having a wall portion that reflects direct light from the light emitting element, is orthogonal to the optical axis of the light emitting element, and When the two axes perpendicular to each other are taken as the vertical axis and the horizontal axis, the wall portion has two protrusions facing each other with the light emitting element in between when viewed from the direction of the optical axis, , and has a top on the vertical axis, is the shortest distance between the optical axis at the apex, option increases the distance between the horizontal axis as the distance from the top along the horizontal axis, the reflective portion And an inclined surface opposed across the light emitting element along the horizontal axis, and a rising surface extending from an upper surface of the light emitting element to an end of the inclined surface, wherein the rising surface is the light emitting element. Reflecting the direct light from the light emitting element, the inclined surface directly Characterized in that it is not subject to.

  FIG. 1 is a perspective view showing an entire illumination device 1 according to an embodiment of the present invention, FIG. 2 is a front view of the illumination device according to an embodiment of the present invention, and FIG. It is AA sectional drawing in.

  As shown in FIGS. 1 and 2, the lighting device 1 includes a mounting portion 9 that is fixed to an arm (not shown), and a main body portion 2 that is rotatably attached to the mounting portion 9 via a rotation mounting portion 92. And having. The main body unit 2 includes a light source unit 3 and a power source unit 8 in which a large number of heat radiation plates 32 and 82 are formed on the outer surface. The light source unit 3 is a box-shaped housing that is long in the lateral direction and includes a plurality of light emitting elements therein. A translucent cover 30 is attached to the front surface and a heat radiating plate 32 is formed on the rear surface.

As illustrated in FIG. 3, the light source unit 3 includes a housing unit 4 that is formed inwardly from an irradiation opening 42 to which a translucent cover 30 is attached.

  The accommodating portion 4 has a rectangular bottom surface 44 and four side wall surfaces 46 extending from the four sides of the bottom surface 44 to the irradiation opening 42. The accommodating part 4 is provided with a light emitting part 5 and a reflecting part 6.

  The light emitting unit 5 includes a plurality of light emitting elements 50 arranged and fixed on the bottom surface 44, and emits light toward the translucent cover 30. The reflecting portion 6 includes a reflecting member 60 in which an inner wall 64 that is a highly efficient reflecting surface is formed around the light emitting element 50. The direct light from the light emitting element 50 is reflected in a desired direction by the inner wall 64 that is a wall portion provided in the reflecting portion 6.

  In the present embodiment, as shown in FIG. 2, when the lighting device 1 is viewed from the front, the horizontal direction that is the longitudinal direction of the lighting device 1 is the first direction X (X axis), and the vertical direction is the second direction. The direction Y (Y axis) and the direction from the back surface to the front surface of the light source unit 3 are defined as a third direction Z (Z axis), and the first to third directions X, Y, and Z are orthogonal to each other. The third direction Z is parallel to the optical axis 41 in the light distribution curve of the entire lighting device 1. In addition, since the arbitrary number of the light emitting elements 50 in the illuminating device 1 can be selected according to a use, in the following description, in addition to the optical axis 41 of the whole illuminating device 1, the optical axis 40 ( (See FIGS. 5 to 8). If the lighting device 1 has one light emitting element 50, the optical axis 41 of the lighting device 1 is the optical axis 40 of the light emitting element 50.

  Next, the light emission part 5 and the reflection part 6 of the illuminating device 1 are demonstrated in detail using FIGS. FIG. 4 is a perspective view showing the reflecting member 60 of the lighting device 1 according to the embodiment of the present invention. FIG. 5 shows the reflecting member 60 and the light emitting element 50 of the lighting device 1 according to the embodiment of the present invention. 6 is a cross-sectional view taken along line BB in FIG. 5, and FIG. 7 is a cross-sectional view taken along line CC in FIG. FIG. 8 is a schematic diagram showing the relationship between the irradiation range of the 1/2 beam angle and the protrusions of the illumination device 1 according to the embodiment of the present invention.

  As shown in FIG. 4, the reflecting member 60 has a rectangular shape that is long in the first direction X in accordance with the shape of the housing portion 4, and includes an outer wall 62 that faces the side wall surface 46 of the housing portion 4, and the light emitting element. An inner wall 64 that is a wall portion that reflects the direct light, and a circular opening 74 in which the light emitting element is disposed.

  In this embodiment, an example of a lighting device in which six light emitting elements are arranged in two rows and three columns will be described. However, the number of light emitting elements is not limited to this, and the lighting device may be a lighting device in which three light emitting elements are arranged in one column. In addition, the number of light emitting elements can be increased or decreased depending on the application. Therefore, the openings 74 are opened in a total of six places, three places in the first direction X and two places in the second direction Y.

  As shown in FIG. 5, the inner wall 64 is formed on the inner side of the outer wall 62 and a partition wall 65 between the first row 10 and the second row 12 of the light emitting elements 50. In the second direction Y, the inner wall 64 has two protrusions 68 that are opposed to each other with the light emitting element 50 interposed therebetween when viewed from the direction of the optical axis 40 of the light emitting element 50 (third direction Z). The inner wall 64 can further include a connecting portion 72 that connects adjacent protrusions 68 and is at least as high as the protrusions 68.

  Here, two axes orthogonal to the optical axis 40 of the light emitting element 50 and orthogonal to each other are defined as a vertical axis 36 and a horizontal axis 38 (see the light emitting element 50 on the upper right in FIG. 5). The optical axis 40 extends from the center of the light emitting element 50 along the third direction Z, the vertical axis 36 extends through the center of the light emitting element 50 along the second direction Y, and the horizontal axis 38 indicates the light emitting element 50. It extends along the first direction X through the center.

The surface of the protrusion 68 has a top 70 on the vertical axis 36 when viewed from the direction of the optical axis 40 (the third direction Z), and the distance M1 between the top 70 and the horizontal axis 38 is the shortest. The distance M2 from the horizontal axis 38 increases as the distance from the top 70 increases along the line 38. By forming the protrusions 68 in this way, the direct light emitted from the light emitting element 50 in the direction of the vertical axis 36 is reflected by the protrusions 68 in the direction of the horizontal axis 38, so that the horizontal axis more efficiently than the direction of the vertical axis 36. A wide irradiation range can be obtained in 38 directions.

  The surface of the protrusion 68 can be a curved surface. By doing in this way, the illuminating device 1 can obtain a gentle light distribution curve in the horizontal axis 38 direction. The curved surface can be a quadratic curve when viewed from the direction of the optical axis 40 (third direction Z). By doing in this way, the illuminating device 1 can obtain a gentle light distribution curve in the horizontal axis 38 direction. The shape of the curved surface is not limited to this, and a shape capable of reflecting light traveling in the second direction Y in the first direction X out of the light emitted from the light emitting element 50 can be employed. For example, a plurality of arcs may be combined as viewed from the direction of the optical axis 40 (third direction Z), arcs, curves, and straight lines may be selected and combined, for example, expressed using a conic coefficient. It can also be a curved line. The curved surface of the projecting portion 68 only needs to be able to efficiently reflect light in the direction of the horizontal axis 38, and is, for example, a convex curved surface that is convex toward the optical axis 40 when viewed from the direction of the optical axis 40 (third direction Z). be able to. Further, for example, as shown in FIG. 9, the protrusion 68a can be an inclined surface extending linearly from the top 70a in the first direction X.

  The protrusion 68 can have a second width D2 that is wider than the first width D1 of the light emitting element 50 in the first direction X along the horizontal axis 38. By doing in this way, since the illuminating device 1 can reflect the light radiate | emitted from the light emitting element 50 to the vertical axis | shaft 36 direction (2nd direction Y) to the horizontal axis 38 direction, the vertical axis | shaft 36 efficiently. A wider irradiation range in the direction of the horizontal axis 38 than in the direction can be obtained.

  The top portion 70 of the protrusion 68 can be adjacent to the light emitting element 50 when viewed from the direction of the optical axis 40 (third direction Z). By doing in this way, the illuminating device 1 efficiently reflects the light emitted from the light emitting element 50 in the direction of the vertical axis 36 on the projection 68 before spreading, thereby efficiently moving the light from the vertical axis 36 direction to the horizontal axis 38 direction. A wide irradiation range can be obtained.

  As shown in FIG. 6, the protrusion 68 is formed as a quadratic curve when its surface is cut off at an arbitrary XY plane, and is formed on a parabolic column surface extending in the substantially third direction Z. The protrusion 68 is formed substantially along the third direction Z, but is inclined so as to slightly increase in diameter or slightly decrease in diameter from the position adjacent to the outer periphery of the light emitting element 50 toward the upper surface 76. Can be formed. In order to make the illuminance distribution obtained by irradiating the opposing wall surfaces of the illuminating device 1 horizontally long, that is, the contour line (isoluminous curve) extends longer in the first direction X than in the second direction Y. In order to do so, the inclination b of the protrusion 68 with respect to the optical axis 40 can be set, for example, in the range of −20 degrees to +10 degrees. In addition, the inclination b can be set in a range of −20 degrees to 0 degrees, and in particular, −20 degrees to −− in order to improve workability when the reflecting member 60 is integrally molded with resin or the like. It is preferable to set a range of 2 degrees. The inclination b can be set to a so-called die taper taper when the reflecting member 60 is integrally molded with resin or the like, for example, -2 degrees. The inclination b is “+” on the optical axis 40 side, and is “−” when the optical axis 40 is tilted away from the optical axis 40 as shown in FIG. In addition, the inclination b is an angle of the top portion 70 of the protrusion 68 with respect to the optical axis 40 in FIG. 6, but the surface of the protrusion 68 has an inclination b based on the parabolic column surface extending in the third direction Z. This indicates that the light emitting element 50 is formed in a truncated cone shape whose diameter decreases from the surface of the light emitting element 50 toward the upper surface 76 of the protrusion 68.

  A plurality of the light emitting elements 50 and the protrusions 68 are arranged along the first direction X, and the inner wall 64 has a connection part 72 that connects the adjacent protrusions 68 and at least the same height as the protrusions 68. it can. By doing in this way, the illuminating device 1 can reflect the light radiate | emitted between the projection part 68 between the projection parts 68 by the connection part 72 to the horizontal axis 38 direction.

As shown in FIG. 7, the reflecting member 60 includes an inclined surface 66 facing the light emitting element 50 along the horizontal axis 38, a rising surface 67 extending from the upper surface of the light emitting element 50 to the end of the inclined surface 66, The rising surface 67 reflects direct light from the light emitting element 50, and the inclined surface 66 has a shape that does not receive direct light from the light emitting element 50. For example, the height of the rising surface 67 can be set so that the inclined surface 66 is formed below the extended line of the line connecting the opposite end of the light emitting element 50 to the upper end of the rising surface 67. By doing in this way, the illuminating device 1 can efficiently utilize the light in the direction of the horizontal axis 38 by not applying the light emitted from the light emitting element 50 in the direction of the horizontal axis 38 to the inclined surface 66. Further, a space 54 is formed below the inclined surface 66, and a holder (not shown) that fixes the light emitting element 50 to the bottom surface 44 is accommodated. Since light does not directly strike the inclined surface 66, the temperature rise of the space 54 can be suppressed.

  As shown in FIG. 8, the light emitted from the light emitting element 50 can draw a virtual conical shape 24 when rotated about the optical axis 40 by a ½ beam angle a. Normally, when the light emitting element 50 is a COB, when the light distribution curve of the light emitted from the COB is obtained, the light intensity reaches the maximum light intensity at the optical axis 40 extending through the center of the COB and extending in the vertical direction of the COB. An angle that is twice the angle between the direction of the two luminous intensity and the optical axis 40 is the ½ beam angle a. Here, when the virtual cone shape 24 at the height H1 of the protrusion 68 along the third direction Z is drawn, a range D3 where the bottom surface 20 of the cone overlaps the protrusion 68 is a width D2 of the protrusion 68. The protrusion 68 can be formed to be narrower than that. In other words, the protrusion 68 has the entire area where the virtual conical shape 24 drawn by the 1/2 beam angle a formed in the range of the height H <b> 1 of the light emitting element 50 to the protrusion 68 overlaps the reflection member 60. They can be formed to overlap. By forming the protrusions 68 in this way, light in the range of the 1/2 beam angle a can be reflected in the direction of the horizontal axis 38, and light can be efficiently distributed in the first direction X.

  The light emitting element 50 may be an LED (Light Emitting Diode), and may be a light emitting element used in an organic EL or other lighting device. As the LED, a chip-on-board type (COB), a surface mount type (SMD), a bullet type, and the like can be used. In the present embodiment, an example in which a COB type LED is used as the light emitting element 50 has been described. However, the present invention is not limited to this.

  The inner wall 64 of the reflecting member 60 is formed in a mirror shape in order to efficiently reflect light. For example, a reflection-enhancing film or silver can be deposited on the inner wall 64 of the reflecting member 60. Further, the inner wall 64 of the reflecting member 60 is not limited to a mirror-like so-called specular reflecting surface, and may be a reflecting surface made of a material having various known reflectivities. For example, the diffuse reflecting surface may be partially or It can also be adopted for the whole. The diffuse reflection surface can be, for example, a white surface containing a diffusing material such as titanium oxide, or a surface on which irregularities are formed by graining, blasting, or the like. In addition, the reflection member 60 can employ a member that reflects a part of incident light and transmits the remaining light and does not completely reflect, for example, incident light and transmitted light like a half mirror. A material having substantially the same strength can be used for the reflecting member 60.

  By causing the illuminating device 1 to emit light, a horizontally long illuminance distribution that is longer in the first direction X than in the second direction Y can be obtained on the irradiation surface facing the front of the illuminating device 1.

  Such an illuminating device 1 can be employed in, for example, a projector for irradiating an outdoor signboard, a canopy light attached to a high ceiling such as a gas station or a factory.

  Although the embodiments of the present invention have been described in detail as described above, many modifications can be made without departing from the novel matters and effects of the present invention.

  Example 1, Comparative Example 1 and Comparative Example in which the same COB (light emitting element 50) in two rows in the second direction Y and three columns in the first direction X are arranged on the flat substrate, and only the reflecting member is changed. For 2, the illuminance distribution and light distribution characteristics were simulated. The simulation results are shown in FIGS.

  As the reflecting member of Example 1, the reflecting member 60 of FIGS. 4 to 7 in which at least the inner wall 64 has a mirror shape is used. The light emitting element 50 in Example 1 uses COB, the outer diameter of the COB is circular, the diameter D1 is 14.5 mm, the width D2 of the protrusion 68 is 36 mm, and between the centers of the COBs adjacent to each other in the first direction X. The distance is 50 mm, the center-to-center distance of the COB adjacent in the second direction is 36 mm, the height H1 of the protrusion 68 in the third direction Z is 18.1 mm, and the inclination b of the protrusion 68 is −2 degrees. It was.

  As the reflection member 60a of Comparative Example 1, the current reflection member 60a shown in FIGS. 10 and 11 was used. FIG. 10 is a plan view schematically showing the structure of the reflecting member 60a of Comparative Example 1, and FIG. 11 is a longitudinal section schematically showing the structure of the reflecting member 60a of Comparative Example 1. The type and shape of the COB (light emitting element 50) and the arrangement of the COB in the first and second directions X and Y in Comparative Example 1 are the same as in Example 1, but there are no protrusions, and from the opening 74 on the COB 50 side. The upper surface 76a has a mirror-like reflecting surface 80 that is a rotary paraboloid having a circular cross section that gradually expands toward the upper surface opening 78, and the opening width L2 on the upper surface 76a of the reflecting surface 80 is 36 mm. The height H2 of the reflecting surface 80 in the third direction Z was 18.1 mm.

  In Comparative Example 2, as shown in FIG. 12, no reflecting member is provided, and the type and shape of COB (light emitting element 50) and the arrangement of the COB in the first and second directions X and Y are the same as those in Example 1. Same as Example 1.

  FIG. 13 is a diagram illustrating an illuminance distribution on a surface to be irradiated facing the front of the lighting apparatus according to the first embodiment. FIG. 14 is a diagram illustrating the light distribution characteristics in the first direction X (scanning angle 0 degree) of the first embodiment. FIG. 15 is a diagram illustrating the light distribution characteristics in the second direction Y (scanning angle 90 degrees) of the first embodiment. FIG. 16 is a diagram illustrating the illuminance distribution on the irradiated surface facing the front of the lighting device of Comparative Example 1. FIG. 17 is a diagram illustrating light distribution characteristics in the first direction X (scanning angle 0 degree) of Comparative Example 1. FIG. 18 is a diagram showing the light distribution characteristics in the second direction Y (scanning angle 90 degrees) of the first comparative example. FIG. 19 is a diagram illustrating the illuminance distribution on the irradiated surface facing the front of the illumination device of Comparative Example 2. FIG. 20 is a diagram showing light distribution characteristics in the first direction X (scanning angle 0 degree) of Comparative Example 2. FIG. 21 is a diagram showing the light distribution characteristics in the second direction Y (scanning angle 90 degrees) of Comparative Example 2. 13, 16, and 19 are rectangular planes in which the first direction X is 30 m and the second direction Y is 20 m.

  In the illumination devices of Comparative Examples 1 and 2, as shown in FIGS. 16 and 19, a substantially circular illuminance distribution was obtained, whereas in the illumination device 1 of Example 1, as shown in FIG. A horizontally long illuminance distribution that is longer in the first direction X than in the second direction Y was obtained.

Moreover, in the illuminating devices of Comparative Examples 1 and 2, as shown in FIGS. 17 to 21, almost the same light distribution curves were obtained in the first direction X and the second direction Y, whereas In the illumination device of Example 1, as shown in FIGS. 14 and 15, the 1/2 beam angle of the light distribution curve in the first direction X is 127 degrees, and 1 of the light distribution curve in the second direction Y. The / 2 beam angle was 72 degrees. In particular, since the 1/2 beam angle of the light distribution curve obtained with the six COB arrangements that did not use the reflecting member of Comparative Example 2 was 115 degrees, Example 1 was 1 / X in the first direction X. The 2 beam angle was larger than the 1/2 beam angle of COB itself, which is the light source. The luminous intensity peak intensity in FIG. 14 is 3.365E + 003, the luminous intensity peak intensity in FIG. 15 is 3.173E + 003, the luminous intensity peak intensity in FIGS. 17 and 18 is 1.596E + 004, and FIG. The peak intensity of light intensity in FIG. 21 was 2.944E + 003.

  In addition, when the light distribution curve of the lighting device 1 of the first embodiment shown in FIG. 14 is seen, the light distribution curve spreads in the end, and the light distribution curve is drawn almost flat in the first direction X in the vicinity of the peak intensity. Thus, it was found that a relatively high luminous intensity can be obtained in a wide range of luminous intensity in the first direction X. Thus, the illuminating device 1 of Example 1 was able to perform wide-angle irradiation.

  In Examples 2 to 6 and Comparative Example 3, the slope b of the protrusion 68 in Example 1 was changed as shown in Table 1, and the illuminance distribution and the light distribution characteristics were simulated. The results of the simulation of the light distribution characteristics are shown in Table 1. The scanning angle of 0 degrees was the first direction X in the illumination apparatus 1, and the scanning angle of 90 degrees was the second direction Y in the illumination apparatus 1. Also in Examples 1 to 5 and Comparative Example 3, the 1/2 beam angle in the first direction X was larger than that of Comparative Example 2 using only COB.

  Moreover, the result of the simulation of illuminance distribution is shown in FIGS. FIG. 22 is a diagram showing the illuminance distribution on the irradiated surface of Comparative Example 3. FIG. 23 is a diagram illustrating the illuminance distribution on the irradiated surface according to the second embodiment. FIG. 24 is a diagram illustrating the illuminance distribution on the irradiated surface of Example 3. FIG. 25 is a diagram illustrating the illuminance distribution on the irradiated surface of Example 4. FIG. 26 is a diagram illustrating the illuminance distribution on the irradiated surface of Example 5. FIG. 27 is a diagram illustrating the illuminance distribution on the irradiated surface of Example 6. In FIG. A curve in each illuminance distribution diagram is a contour line, which is an isoilluminance curve representing the same illuminance.

  The illuminance distribution of Comparative Example 3 shown in FIG. 22 has a saddle shape in which the contour line becomes narrow near the center, but the illuminance distributions of Examples 2 to 6 shown in FIGS. 23 to 27 are approximately in the first direction X. It became an almost rectangular shape that spreads out. In particular, a substantially rectangular illuminance distribution was obtained while maintaining high illuminance in the illuminance distributions of Examples 3 to 6 shown in FIGS.

DESCRIPTION OF SYMBOLS 1 Illuminating device, 2 main-body part, 3 light source part, 4 accommodating part, 5 light emission part, 6 reflection part, 6a reflection part, 8 power supply part, 9 attachment part, 92 rotation attachment part, X 1st direction, Y 2nd Direction, Z third direction, 10 1st row, 12 2nd row, 20 irradiation range within 1/2 beam angle at the height position of the protrusion, 24 virtual cone shape, 30 light emitting cover, 32 Radiation plate, 36 Vertical axis, 38 Horizontal axis, 40 Optical axis, 42 Irradiation opening, 44 Bottom surface, 46 Side wall surface, 50 Light emitting element, 52 Substrate, 54 Holder housing part, 60 Reflective member, 60a Reflective member, 62 Outer wall , 64 Inner wall, 65 Partition wall, 66 Inclined surface, 67 Rising surface, 68 Protruding part, 68a projecting part, 70 Top part, 70a Top part, 72 Connection part, 74 Opening part, 76
Upper surface, 76a Upper surface, 78 Upper opening, 80 Reflecting surface, 82 Heat sink, H1 Projection height, H2 Reflecting surface height, L1 Distance between light emitting element centers, L2 Upper opening diameter, a 1 / 2 beam angle, b tilt angle, D1 light emitting element diameter, D2 protrusion width, M1 distance between protrusion and horizontal axis, M2 distance between protrusion and horizontal axis

Claims (6)

A light emitting element;
A reflection part having a wall part for reflecting direct light from the light emitting element;
Have
When two axes orthogonal to the optical axis of the light emitting element and orthogonal to each other are a vertical axis and a horizontal axis,
The wall has two protrusions facing each other across the light emitting element as seen from the direction of the optical axis,
The surface of the protrusion has a top on the vertical axis, and the distance from the optical axis is the shortest at the top, and the distance from the horizontal axis increases as the distance from the top increases along the horizontal axis. Do Ri,
The reflective portion is
Inclined surfaces facing each other across the light emitting element along the horizontal axis;
A rising surface extending from an upper surface of the light emitting element to an end of the inclined surface;
Further comprising
The rising surface reflects direct light from the light emitting element,
The illuminating device, wherein the inclined surface does not receive direct light from the light emitting element . In claim 1,
The lighting device characterized in that the surface of the protrusion is a curved surface. In claim 2,
The lighting device according to claim 1, wherein the curved surface is a quadratic curve when viewed from the direction of the optical axis. In any one of Claims 1 thru | or 3,
The projection device has a second width wider than a first width of the light emitting element in a first direction along the horizontal axis. In any one of Claims 1 thru | or 4,
The lighting device, wherein the top of the protrusion is adjacent to the light emitting element. In any one of Claims 1 thru | or 5,
A plurality of the light emitting elements and the protrusions are arranged along the first direction,
The lighting device according to claim 1, wherein the wall portion has a connecting portion that connects the adjacent protruding portions and has at least the same height as the protruding portion.

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