JP2015088389A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device including a reflection part which suppresses glare while inhibiting light loss.SOLUTION: A lighting device includes: a light source 20; an optical member 30 which emits light entered thereinto from the light source 20; and a reflection part 10 which reflects the light from the light source 20 toward the optical member 30. The reflection part 10 includes a first reflection surface 121 which is provided in an orientation in which direct light from the light source 20 does not enter.

Description

  The present invention relates to an illuminating device including a reflecting portion that reflects light.

  Lighting devices with various light distribution variations such as LED spotlights and LED universal downlights have been proposed. When these lighting devices are used, for example, in a store, a food supermarket, a living space, etc., it is possible to produce a light effect (space effect) suited to the application.

  In LED spotlights, LED universal downlights, and the like, an optical lens is often installed and used on the irradiation direction side of a light source in order to control light distribution variations. There are various types of optical lenses, and by installing an optical lens selected according to a desired application, it is possible to control light distribution from a wide range of diffusion and narrow angle to wide angle. Thereby, for example, it is possible to produce various light effects according to the application, such as irradiating an irradiation object in a spot manner. Moreover, in the illumination device as described above, a high-power, multi-grain type LED is often employed as a light source, and an optical lens is generally employed in accordance with the multi-grain cup-shaped lens. .

  However, in recent years, the use of integrated LED modules as a light source has been increasing. Since the integrated LED module has a large light emitting unit size, when a conventional cup-shaped lens is adopted as the optical lens, the size of the optical lens becomes large.

  Therefore, in order to make the optical lens thin and small, it has been proposed to employ a Fresnel lens as the optical lens (for example, Patent Document 1).

JP 2007-13416 A

  However, when a Fresnel lens is used as an optical lens, there is a certain distance between the light source and the Fresnel lens, and depending on the angle of light incident on the Fresnel lens from the light source, the Fresnel lens is not reflected completely and is used as it is. Loss occurs, such as coming off.

  Further, when a reflection plate is installed between the light source and the Fresnel lens in order to suppress light loss, there is a problem that although the loss of light can be suppressed by the installed reflection plate, it becomes dazzling.

  This invention is made | formed in view of the above-mentioned situation, and it aims at providing an illuminating device provided with the reflection part which can also suppress glare while suppressing the loss of light.

  In order to solve the above-described problem, an aspect of an illumination device according to the present invention includes a light source, an optical member that emits light incident from the light source, and reflects the light from the light source toward the optical member. A reflection part, and the reflection part has a first reflection surface provided in a direction in which direct light from the light source does not enter.

  In one aspect of the illumination device according to the present invention, an angle formed between the first reflecting surface and the optical axis of the optical member is a light connecting the surface connecting the light source and the outer edge of the optical member and the light of the optical member. It may be greater than the angle formed with the axis.

  In the aspect of the lighting device according to the present invention, the first reflecting surface may be provided outside a region surrounded by a surface connecting the light source and an outer edge portion of the optical member.

  In the illumination device according to the aspect of the present invention, in the cross section of the reflection portion including the optical axis of the optical member, the cross section of the first reflection surface may be a substantially straight line.

  Further, in one aspect of the illumination device according to the present invention, the reflection unit includes a second reflection surface that reflects direct light from the light source toward the optical member, and the second reflection surface includes the first reflection surface. The first reflection surface may be provided in a position closer to the light source than one reflection surface.

  In the lighting device according to the aspect of the present invention, in the cross section of the reflecting portion including the optical axis of the optical member, the second reflecting surface may be a curved line including a part of a parabola.

  In the aspect of the lighting device according to the present invention, the reflection unit further includes a third reflection surface for reflecting light from the light source toward the optical member, and the third reflection surface is The first reflection surface may be connected to the first reflection surface at a position closer to the optical member than the first reflection surface.

  In the aspect of the lighting device according to the present invention, the third reflection surface may be a light absorption surface that does not diffusely reflect light from the light source. Here, the third reflecting surface may be textured.

  Moreover, the one aspect | mode of the illuminating device which concerns on this invention WHEREIN: The said optical member is good also as a Fresnel lens.

  ADVANTAGE OF THE INVENTION According to this invention, an illuminating device provided with the reflection part which can also suppress glare while suppressing the loss of light is realizable.

It is a disassembled perspective view of the illuminating device which concerns on Embodiment 1 of this invention. It is sectional drawing of the illuminating device which concerns on Embodiment 1 of this invention. It is sectional drawing of an example of the reflection part which concerns on Embodiment 1 of this invention. It is principal part sectional drawing of the illuminating device which concerns on Embodiment 1 of this invention. It is principal part sectional drawing for demonstrating the effect of the illuminating device which concerns on Embodiment 1 of this invention. It is a figure for demonstrating the effect of the illuminating device which concerns on Embodiment 1 of this invention. It is principal part sectional drawing of the illuminating device which concerns on the modification of Embodiment 1 of this invention. It is sectional drawing of an example of the reflection part which concerns on Embodiment 2 of this invention. It is principal part sectional drawing of the illuminating device which concerns on Embodiment 2 of this invention. It is a figure which shows the mode of the irregular reflection of a 3rd reflective surface. It is principal part sectional drawing of the illuminating device which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Accordingly, the numerical values, shapes, materials, components, arrangement positions and connection forms of components, processes (steps), process orders, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Absent. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment 1)
First, lighting device 1 according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the illumination device of FIG.

  The illuminating device 1 shown in FIG. 1 and FIG. 2 is used for lighting fixtures, such as a spotlight and a downlight which illuminates light below.

  The lighting device 1 includes a reflecting portion 10, a light source 20, an optical member 30, an instrument main body 40, and a frame body 50. As illustrated in FIG. 1, the illumination device 1 is configured by stacking an instrument body 40, a light source 20, a reflection unit 10, an optical member 30, and a frame body 50 in this order.

  Hereinafter, each component in the illuminating device 1 is demonstrated in detail.

[Light source 20]
First, the light source 20 will be described.

  The light source 20 is a light emitting module having a light emitting element, for example, and is an LED light source that emits predetermined light radially. The light source 20 is configured to emit white light, for example. The light source 20 includes a base 20b, a plurality of LEDs 20a that are bare chips mounted on the base 20b, and a sealing member that seals the LEDs 20a. 2, the optical axis of the light source 20 is in the vertical direction (downward in the figure).

  The base 20b is a mounting substrate for mounting the plurality of LEDs 20a, and is, for example, a resin substrate, a ceramic substrate, an insulating-coated metal base substrate, or the like. In addition, the base 20b is, for example, a plate having a plane that is rectangular in plan view, and the bottom surface (the upper side in FIG. 2) of the base 20b is attached to the instrument body 40 and fixed. Although not shown, the base 20b is formed with a pair of electrode terminals (a positive electrode terminal and a negative electrode terminal) for receiving DC power from outside for causing the LED 20a (light source 20) to emit light.

[Optical member 30]
Next, the optical member 30 will be described. The optical member 30 is disposed at a position facing the light source 20 of the instrument body 40 and emits light incident from the light source 20.

  The optical member 30 is fixed to the inner bottom surface of the frame body 50, and the light of the light source 20 incident from one surface (upper surface in FIG. 2) in the thickness direction of the optical member 30 is opposed to the one surface. The light is emitted from the surface (the lower surface in FIG. 2). The optical member 30 is formed using a translucent material, for example, and may be formed using a transparent resin material such as PMMA (acrylic) or polycarbonate, or a transparent material having insulation properties such as a glass material. it can.

  In the present embodiment, a description will be given using a Fresnel-shaped lens as an example of the optical member 30. More specifically, the optical member 30 according to the present embodiment has a Fresnel-shaped lens in which a lens that is refracted or transmitted is formed at the center of one surface in the thickness direction and is totally reflected in a region other than the center. And the light incident from one side in the thickness direction is emitted from the other side in the thickness direction. The optical member 30 is not limited to this example, and may be a Fresnel lens, a convex lens, or a translucent flat panel.

[Equipment body 40]
Next, the instrument body 40 will be described. The instrument body 40 supports the light source 20 inside.

  In the present embodiment, the instrument body 40 is a mounting base to which the light source 20 is attached and a heat sink that dissipates heat generated by the light source 20. The instrument main body 40 is formed in a substantially cylindrical shape using a metal material, and is formed, for example, through an aluminum die casting process.

  Specifically, the instrument main body 40 has an attachment portion for attaching the light source 20. That is, the instrument main body 40 fixes the light source 20 by attaching the light source 20 to an attachment part. In addition, the instrument main body 40 is not limited to the case where the light source 20 is directly fixed, but may be fixed to the attachment portion of the instrument main body 40 via a heat dissipation member (heat sink).

  As shown in FIG. 1, a plurality of radiating fins projecting downward are provided in the lower part (lower part in FIG. 1) of the instrument body 40. Thereby, the heat generated by the light source 20 can be efficiently radiated.

[Frame 50]
Next, the frame 50 will be described. The frame body 50 is, for example, a lamp, and is fixed to the optical member 30 and the reflecting portion 10 between the instrument body 40 and the frame body 50 by being attached to the instrument body 40.

  An incident port through which light from the light source 20 that has passed through the optical member 30 enters is provided on the upper portion of the frame 50. In addition, at the lower part of the frame body 50, there is provided an emission port for emitting light incident on the frame body 50 to the outside. These entrance and exit are opened in a circular shape.

  The frame 50 is formed in a substantially cylindrical shape using a metal material, like the instrument body 40, and is formed, for example, through an aluminum die casting process.

[Reflecting part 10]
Next, the reflection unit 10 will be described. The reflection unit 10 is provided between the light source 20 and the optical member 30 and reflects light from the light source 20 toward the optical member 30.

  In the present embodiment, the reflecting portion 10 is fixed to the inner surface of the instrument main body and the inner surface of the frame 50, and the light from the light source 20 is one surface in the thickness direction of the optical member 30 (the lower surface in FIG. 2). It has a reflection function that reflects light. 1 and 2, the reflecting portion 10 is configured so that the inner diameter gradually increases from the entrance to the exit. For example, a hard white resin material such as polybutylene terephthalate (PBT) is used. Can be formed. The reflective surface of the reflective portion 10 may be formed of a metal material such as aluminum. Moreover, the reflection part 10 may be formed of resin, and a metal vapor deposition film (metal reflection film) made of a metal material such as silver or aluminum may be formed on the inner surface of the reflection part 10 as a reflection surface.

  Here, the reflector 10 will be described in detail with reference to FIGS. 3 to 5 with reference to FIG.

  FIG. 3 is a cross-sectional view of an example of the reflecting unit according to the embodiment, and FIG. 4 is a cross-sectional view of the main part of the lighting device according to the first embodiment, and the main part of the lighting device having the reflecting unit illustrated in FIG. It is sectional drawing. FIG. 5 is a cross-sectional view of an essential part for explaining the effect of the lighting apparatus according to the first embodiment. Here, FIG. 3 shows a right side portion of the cross section of the reflecting portion 10 including the optical axis of the light source 20 (optical member 30) shown in FIG.

  As shown in FIG. 3, the reflector 10 of the present embodiment includes a first reflector 12 having a first reflector 121, a second reflector 11 having a second reflector 111, and a third reflector 131. The 3rd reflection part 13 which has. These three reflecting surfaces (the first reflecting surface 121, the second reflecting surface 111, and the third reflecting surface 113) are provided so as to have different inclinations. In addition, as for the reflection part 10, the area | region which the 1st reflection part 12 occupies is dominant (most) as shown, for example in FIG.

  The first reflection surface 121 is a reflection surface provided on the first reflection unit 12 in a direction in which direct light from the light source 20 does not enter.

  Here, if the direct light from the light source 20 is incident on the first reflecting surface 121, the first reflecting surface 121 and the optical member 30 are close to each other, and therefore, an acute angle (the optical member 30). The light is reflected at a large angle (with respect to the optical axis), and the glare cannot be suppressed. Therefore, in this Embodiment, in order to suppress the glare by the reflection part 10, the 1st reflection surface 121 is reflected in the reflection part 10 (1st reflection part 12) so that the direct light from the light source 20 may not be reflected as much as possible. Provided.

  More specifically, the first reflecting surface 121 is provided so as to satisfy the relationship of angle θ1> angle θ2 shown in FIG. That is, the angle θ2 formed by the first reflecting surface 121 and the plane of the light source 20 (line L3a in FIG. 4) is a plane connecting the center of the light source 20 and the outer edge of the optical member 30 (line L2 in FIG. 4) and the light source. The reflecting portion 10 is fixed to the inner surfaces of the instrument body 40 and the frame body 50 so as to be smaller than an angle θ1 formed by 20 planes (line L3 in FIG. 7). In other words, an angle (a complementary angle of θ2) formed between the first reflecting surface 121 and the optical axis of the optical member 30 (line L1 in FIG. 4) connects the light source 20 and the outer edge portion of the optical member 30 (FIG. 4). The reflecting portion 10 is fixed to the inner surfaces of the instrument body 40 and the frame body 50 so as to be equal to or larger than the angle (line L1 in FIG. 4) formed by the line L2) and the optical axis of the optical member 30 (line L1 in FIG. 4). The

  In addition, the first reflecting surface 121 is provided outside the region where the direct light of the light source 20 hits. More specifically, the first reflecting surface 121 is a region (region above the line L2 in FIG. 4) surrounded by a surface (line L2 in FIG. 4) connecting the light source 20 and the outer edge of the optical member 30. Provided outside. FIG. 5 shows a state in which the direct light of the light source 20 incident on the outer edge portion of the optical member 30 is emitted from the optical member 30 (light P1 in FIG. 5).

  Here, the cross section of the first reflecting surface 121 is preferably provided in a substantially straight line in the cross section of the reflecting portion 10 including the optical axis of the optical member 30. Thereby, the 1st reflective surface 121 can be provided out of the area | region where the direct light of the light source 20 hits.

  Thereby, since the 1st reflective surface 121 can suppress reflecting the direct light from the light source 20 toward the optical member 30, it can prevent that the 1st reflective surface 121 directly reflects light irregularly. Moreover, the 1st reflective surface 121 can reflect the indirect light from the light source 20 toward the optical member 30, for example, as shown in FIG. Since the indirect light has a smaller amount of light than the direct light, even if it is diffusely reflected and enters the optical member 30, it is difficult to lead to dazzling. Here, the indirect light is, for example, light bounced off by the optical member 30.

  Thus, the reflection part 10 which has the 1st reflective surface 121 can also suppress glare while suppressing the loss of light.

  The first reflecting surface 121 is not limited to the case where the first reflecting surface 121 is substantially straight in the cross section of the reflecting portion 10 including the optical axis of the optical member 30. The first reflecting surface 121 may be a gentle curve (close to a straight line) or a part of a gentle parabola in the cross section. In this case, the first reflecting surface 121 has a portion that directly reflects light, so that the effect of glare is impaired. However, due to the specifications of the lighting device 1 and the design requirements of the reflecting portion 10, etc. What is necessary is just to select suitably.

  The second reflecting surface 111 is a reflecting surface provided on the second reflecting portion 11 in order to reflect light directly from the light source 20 toward the optical member 30. The second reflecting surface 111 is provided so as to be connected to the first reflecting surface 121 at a position closer to the light source 20 than the first reflecting surface 121. The second reflecting surface 111 is, for example, a substantially straight line in the cross section of the reflecting unit 10 including the optical axis of the optical member 30.

  An angle θ3 formed by the second reflecting surface 111 and the plane of the light source 20 (line L3b in FIG. 4) is larger than an angle θ2 formed by the first reflecting surface 121 and the plane of the light source 20 (line L3a in FIG. 4). In other words, the angle formed by the second reflecting surface 111 and the optical axis of the optical member 30 (line L1 in FIG. 4) (a complementary angle of θ3) is the first reflecting surface 121 and the optical axis of the optical member 30 (line in FIG. 4). The reflecting portion 10 is fixed to the inner surfaces of the instrument main body 40 and the frame body 50 so as to be smaller than an angle formed by L1) (a complementary angle of θ2).

  The second reflecting surface 111 is provided outside the outer shell of the light source 20 (line L4 in FIG. 4). In other words, the starting point of the second reflecting surface 111 (line L5 in FIG. 4) is provided outside the outer shell of the light source 20.

  Thus, by providing the second reflection surface 111 for reflecting light directly from the light source 20 toward the optical member 30 in the vicinity of the light source 20 of the reflection unit 10, the reflection surface of the reflection unit 10 is changed to the first reflection surface. The light extraction efficiency can be increased as compared with the case where only 121 is formed. In addition, since the second reflection surface 11 is provided at a position away from the optical member 30, even if the second reflection surface 11 is provided, the influence on the glare is slight.

  The third reflecting surface 131 is a reflecting surface provided on the third reflecting portion 13 in order to reflect the light from the light source 20 toward the optical member 30. The third reflecting surface 131 is connected to the first reflecting surface 121 at a position closer to the optical member 30 than the first reflecting surface 121. Thereby, the light extraction efficiency and glare of the reflection part 10 can be controlled.

[effect]
Here, the effect of the illumination device of the present embodiment will be described with reference to FIG.

  FIG. 6 is a diagram for explaining the effect of the illumination device of the present embodiment. In FIG. 6, the comparison of the glare of the illuminating device which concerns on a comparative example and the illuminating device of this Embodiment is shown. In FIG. 6, the horizontal axis indicates the glare angle, and the closer to the origin, the closer to the vertical downward direction in FIG. The vertical axis represents the light intensity value. Moreover, A has shown the measurement result of the illuminating device which concerns on a comparative example, B has shown the measurement result of the illuminating device of this Embodiment. Here, the illuminating device according to the comparative example includes, for example, a curved reflecting plate that is not provided with a dazzling countermeasure as in the present embodiment.

  Therefore, as shown in FIG. 6, the lighting device of the present embodiment has lower luminous intensity values at glare of 15 degrees and glare of 30 degrees than the lighting device of the comparative example. It can be seen that glare can be suppressed.

  As described above, in this embodiment, it is possible to realize an illuminating device including a reflection portion that can suppress glare while suppressing loss of light.

  Moreover, in the illuminating device 1 in this Embodiment, as shown, for example in FIG. 3, the 1st reflective surface 121 is provided so that it may become a dominant area | region with the reflective surface formed in the reflection part 10. As shown in FIG. Therefore, even if the 2nd reflective surface 111 and the 3rd reflective surface 131 are formed, the degree to which they affect glare is small. That is, the illuminating device 1 provided with the reflection part 10 of this Embodiment has an effect that glare can also be suppressed, suppressing the loss of light.

(Modification)
FIG. 7 is a cross-sectional view of main parts of a lighting device according to a modification of the first embodiment.

  In the first embodiment, the surface connecting the light source 20 and the outer edge portion of the optical member 30 is described as the surface connecting the center of the light source 20 and the outer edge portion of the optical member 30 (line L2 in FIG. 4), but is not limited thereto. . As shown in FIG. 7, the surface connecting the light source 20 and the outer edge portion of the optical member 30 is a surface connecting the one end surface of the light source 20 and the outer edge portion of the optical member 30 (line L7 in FIG. 7). Good.

  Here, one end surface of the light source 20 is an end surface farther from the outer edge portion of the optical member 30 (surface of line L6 in FIG. 7). In this case, the first reflecting surface 121A may be provided so as to satisfy the relationship of angle θ3> angle θ2 shown in FIG. That is, the angle θ2 formed between the first reflecting surface 121A and the plane of the light source 20 (line L3a in FIG. 7) is a plane connecting the one end surface of the light source 20 and the outer edge of the optical member 30 (line L7 in FIG. 7). And the reflecting portion 10 is fixed to the inner surfaces of the instrument body 40 and the frame body 50 so as to be smaller than an angle θ3 formed by the plane of the light source 20 (line L3 in FIG. 7).

  By doing in this way, 121 A of 1st reflective surfaces which the direct light from the light source 20 cannot enter more can be provided in the reflection part 10 (1st reflection part 12A). Thereby, an illuminating device provided with the reflective part which can also suppress glare while suppressing the loss of light is realizable.

(Embodiment 2)
In Embodiment 1, although the 2nd reflective surface 111 demonstrated as a substantially straight line (in the cross section of the reflection part 10 containing the optical axis of the optical member 30), it is not restricted to it. In the second embodiment, an example in which the second reflecting portion is not substantially straight will be described with reference to the drawings. In the following, differences from the first embodiment will be mainly described.

  FIG. 8 is a cross-sectional view of an example of the reflecting section according to Embodiment 2 of the present invention. FIG. 9 is a cross-sectional view of a main part of the illuminating device according to Embodiment 2, and is a cross-sectional view of the main part of the illuminating device having the reflecting section shown in FIG. In FIG. 9, the optical member 30 has a flat portion 31 having a flat surface that is not a Fresnel shape at the center.

  As shown in FIG. 9, the reflecting portion 10B of the present embodiment includes a first reflecting portion 12 having a first reflecting surface 121, a second reflecting portion 11B having a second reflecting surface 111B, and a third reflecting surface 131. The 3rd reflection part 13 which has. The reflecting portion 10B of the present embodiment is different from the reflecting portion 10 of the first embodiment in the shape of the second reflecting surface 111B.

  Specifically, the second reflecting surface 111B is a curve including a part of a parabola in the cross section of the reflecting portion 10 including the optical axis of the optical member 30. Since others are the same as those of the first embodiment, the description thereof is omitted.

  Thereby, the light reflected (controlled) by the second reflecting surface 111 </ b> B can be collected in the vicinity (the region Y in the drawing) of the flat portion 31 that is the flat surface of the optical member 30. Thereby, the light extraction efficiency is improved, and the effect of reducing glare can be achieved. That is, the second reflecting surface 111 </ b> B is effective when the flat surface portion 31 that is a flat surface is formed at the center of the optical member 30.

  In addition, when the Fresnel shape is formed also in the center part of the optical member 30, the shape of Embodiment 1 is more preferable.

  Further, the shape of the second reflecting surface 111B may not be a curve including a part of a parabola, and may be a round shape depending on the state of the irradiation surface and the like.

(Embodiment 3)
The third embodiment will be described below with reference to the drawings.

  FIG. 10 is a diagram illustrating a state of irregular reflection on the third reflecting surface. FIG. 11 is a cross-sectional view of main parts of the lighting apparatus according to Embodiment 3. Elements similar to those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the first and second embodiments, the third reflecting surface 131 is a reflecting surface provided on the third reflecting portion 13 in order to reflect the light from the light source 20 toward the optical member 30, and serves as a light absorbing surface. The case where it was not processed was demonstrated. In the third reflecting surface in the first and second embodiments, as shown in the region Z1 in FIG. 10, light refracted or reflected by the optical member 30 is likely to gather on the third reflecting surface, so that light is reflected in various directions ( Diffuse reflection). As a result, as shown in the region Z2, the light emitted from the optical member 30 is mixed with the light irregularly reflected in the region Z1, and thus the glare is increased. That is, according to the third reflecting surface in the first and second embodiments, the irregularly reflected light is mixed in the range that can be seen by the human eye around the optical member 30, so that the glare (glare) is likely to increase.

  For this reason, in the third embodiment, for example, the third reflecting surface is made a light absorbing surface by making the third reflecting surface black or applying a texture to the third reflecting surface. That is, the third reflection surface in the third embodiment is a light absorption surface that does not diffusely reflect the light from the light source 20. Thereby, the glare by a 3rd reflective surface can be suppressed.

  Moreover, as a structure which suppresses the glare by a 3rd reflective surface, it is not restricted to the case where a 3rd reflective surface is used as a light absorption surface. For example, a configuration may be adopted in which the third reflecting surface is not provided, such as a reflecting portion 10C in which the third reflecting surface shown in FIG. 11 is a light absorbing surface.

  Thereby, the glare by a 3rd reflective surface can be suppressed.

  In the case of the present embodiment, the light extraction efficiency is slightly reduced. Therefore, the shape and the degree of absorption of the third reflecting surface are within the allowable range of the light extraction efficiency within the allowable range of the glare. It may be determined based on the allowable range.

(Other variations)
Although the lighting device according to the embodiment has been described above, the present invention is not limited to the above embodiment.

  For example, in the first to third embodiments, the case where the reflecting surface of the reflecting portion is a mirror surface (having less diffusibility) that has an effect of further reducing glare, but is not limited thereto. The reflecting surface of the reflecting part may be a white reflecting plate having diffusibility or a rough surface.

  As mentioned above, although the illuminating device which concerns on one or several aspects was demonstrated based on embodiment, this invention is not limited to this embodiment. Unless it deviates from the gist of the present invention, various modifications conceived by those skilled in the art have been made in this embodiment, and forms constructed by combining components in different embodiments are also within the scope of one or more aspects. May be included.

  In addition, it is realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, and forms obtained by making various modifications conceived by those skilled in the art to each embodiment. Forms are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Illuminating device 10, 10B, 10C Reflection part 11, 11B 2nd reflection part 12, 12A 1st reflection part 13 3rd reflection part 111 2nd reflection surface 121, 121A 1st reflection surface 131 3rd reflection surface 20 Light source 20a LED
20b Base 30 Optical member 31 Planar part 40 Instrument body 50 Frame

Claims (10)

A light source;
An optical member that emits light incident from the light source;
A reflection unit that reflects light from the light source toward the optical member;
The reflecting portion has a first reflecting surface provided in a direction in which direct light from the light source does not enter.
Lighting device. The angle formed by the first reflecting surface and the optical axis of the optical member is equal to or greater than the angle formed by the surface connecting the light source and the outer edge of the optical member and the optical axis of the optical member.
The lighting device according to claim 1. The first reflecting surface is provided outside a region surrounded by a surface connecting the light source and an outer edge portion of the optical member.
The illumination device according to claim 1 or 2. In the cross section of the reflecting portion including the optical axis of the optical member,
The first reflecting surface has a substantially straight cross section.
The illuminating device of any one of Claims 1-3. The reflection unit has a second reflection surface that reflects direct light from the light source toward the optical member;
The second reflecting surface is provided to be connected to the first reflecting surface at a position closer to the light source than the first reflecting surface.
The illuminating device of any one of Claims 1-4. In the cross section of the reflecting portion including the optical axis of the optical member,
The second reflecting surface is a curved line including a part of a parabola,
The lighting device according to claim 5. The reflective portion further includes a third reflective surface for reflecting light from the light source toward the optical member,
The third reflecting surface is provided to be connected to the first reflecting surface at a position closer to the optical member than the first reflecting surface.
The illuminating device of any one of Claims 1-6. The third reflection surface is a light absorption surface that does not diffusely reflect light from the light source.
The lighting device according to claim 5. The third reflective surface is textured.
The lighting device according to claim 8. The optical member is a Fresnel lens.
The illuminating device of any one of Claims 1-9.

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