JP2014049260A - Lighting device and lighting system - Google Patents

Abstract

Provided are an illumination device and an illumination system that can improve the emission efficiency on the illumination space side with a simple structure, and thus can improve the utilization efficiency of light emitted from a light source.
An illumination module (1) has an LED (4), a first surface (2a) and a second surface (2b) opposite to each other, and guides light emitted from the LED (4) to guide the first surface (2a) and the first surface (2a). And a light guide plate 2 emitting from the surface 2a. On the first surface 2 a of the light guide plate 2, a plurality of light reflection patterns 8 that are light extraction structures for extracting light guided inside the light guide plate 2 are provided in a scattered manner.
[Selection] Figure 1

Description

  The present invention relates to an illumination device and an illumination system including a light guide member that guides light emitted from a light source.

  Since an LED (Light Emitting Diode) consumes less power and has a long life, an illuminating device using an LED instead of an illuminating device using a light bulb has been developed.

  As an example of such a lighting device, a lighting device disclosed in Patent Document 1 is known.

  As shown in FIG. 7A, the illumination device 100 disclosed in Patent Document 1 includes a skylight 101, light from the light source 102 that is disposed adjacent to the light source 102 and is incident from the side surface, and the skylight. A light guide plate 110 that emits sunlight L1 and L2 incident through 101 to the lower side (the side opposite to the skylight 101). Thereby, the light-guide plate 110 can be functioned as an illumination member and a lighting member.

  Further, in the double-sided light emitting device 200 disclosed in Patent Document 2, as shown in FIG. 8, a light guide plate 210 in which a concave or convex pattern 201 is formed only on the surface (upper surface) facing the skylight is used. It is disclosed. This pattern 201 is made of a transflective film.

JP 2012-49050 A (published March 8, 2012) JP 2007-48636 A (published February 22, 2007)

  However, in the illumination device 100 disclosed in the above-described conventional Patent Document 1, when light is incident from the side surface of the light guide plate 110, the amount of light emitted from the light guide plate 110 is the surface facing the outdoors (the skylight side). That is, it is substantially the same on both the upper side and the side facing the indoor side (lower side). Therefore, the ratio at which the light emitted from the light source 102 can be used as indoor lighting is less than half of the amount of light emitted from the light source 102, and the use efficiency of the light is reduced.

  In order to improve the light emission efficiency of the light emitted from the light source 102 to the lower side of the light guide plate 110, a concave or convex pattern 111 is formed on the upper surface side of the light guide plate 110 as shown in FIG. Therefore, the structure of the light guide plate 110 is complicated.

  Therefore, in the illumination device 100, it is difficult to improve the emission efficiency of the light emitted from the light source 102 in the predetermined direction of the light guide plate 110 (one side of the light guide plate 110) with a simple structure. Has the problem.

  On the other hand, the double-sided light emitting device 200 disclosed in Patent Document 2 discloses a structure in which the light quantity ratio from each of the two light exit surfaces of the light guide plate 210 is controlled by laminating a transflective film.

  However, if it is a display device via a liquid crystal panel, it will not be a problem because it functions as a backlight of a transmissive liquid crystal panel, but coloring occurs due to the wavelength dependence of light absorption in the visible light region, and the quality is degraded. Concerned.

  The present invention has been made in view of the above-described conventional problems, and its purpose is to improve the emission efficiency on the illumination space side with a simple structure, and thus to improve the utilization efficiency of light emitted from the light source. An object is to provide a lighting device and a lighting system that can be improved.

  In order to solve the above problems, the illumination device of the present invention has a first light source and a second surface facing each other, guides the light emitted from the light source, and guides the first light. And a light guide member that emits light from the second surface, the first surface of the light guide member has light for extracting light guided inside the light guide member. A plurality of light reflecting portions which are extraction structures are provided in a scattered manner.

  According to said invention, an illuminating device has the 1st surface and 2nd surface which mutually oppose, light-guides the light radiate | emitted from the said light source, and this 1st surface and 2nd The light guide member which radiate | emits from the surface is provided. For this reason, the light that guides the light guide member travels in a direction substantially parallel to the surface of the light guide member, and travels through the light guide member by repeating total reflection on the surface of the light guide member. The total reflection condition is broken by the light extraction structure provided on the first surface, and the light is emitted from the second surface.

  Here, the light extraction structure is a structure that converts an optical path of light to be guided and extracts light to the outside of the light guide member. For example, when the light extraction structure is formed on the first surface, which is one surface of the light guide member, with highly transparent irregularities, the light path is converted by scattering in the light extraction structure, and the first surface is the opposite surface. The light can be extracted from the two surfaces. At this time, since the total reflection condition collapses at the same time, there arises a problem that light leaks to the first surface which is one surface through the portion of the light extraction structure. This problem does not pose a problem when the entire light reflection plate can be disposed facing the back surface of the light reflecting portion, that is, the first surface as in the liquid crystal display device. However, in the case of window illumination, since it is necessary to ensure see-through, the entire light reflector cannot be disposed on the first surface, which is the back surface of the light guide member, and light to the first surface A problem occurs that the utilization rate decreases.

  Therefore, in the present invention, the light extraction structure is provided with a plurality of light reflection portions scattered on one surface of the light guide member, that is, the first surface, which is the back surface, so that the light extraction structure has reflectivity. . As a result, light can be efficiently emitted from the second surface without passing through the light extraction structure and leaking to one surface of the light guide member, that is, the first surface that is the back surface.

  That is, by making the light extraction structure into a plurality of scattered light reflecting portions, the amount of light extraction per area of the light extraction structure can be increased, and the size of the light extraction structure can be reduced. As a result, since the area of the portion without the light extraction structure can be increased, the see-through property can be improved.

  Therefore, it is possible to provide an illumination device that can improve the emission efficiency of light emitted from the light source in a predetermined direction with a simple structure.

  In the illumination device according to the aspect of the invention, it is preferable that the light reflecting portion has a reflectance of 60% or more.

  Thereby, when the reflectance of light is 60% or more, the amount of light emitted to the second surface that is the front surface is larger than the amount of light leakage to the first surface that is the back surface of the light guide member, Light utilization is improved.

  In the illuminating device of the present invention, the light reflecting portion is made of an ink coating film including light reflecting particles, a white coating film including light reflecting particles, a light reflecting metal film, or a light reflecting plastic material. It is preferable that

  Thereby, the light extraction structure can be formed with a simple configuration. Moreover, since it is only necessary to spray paint or to apply a metal film or a plastic material, construction is also easy.

  In the illuminating device of the present invention, the plane size of each of the light reflecting portions is preferably a maximum dimension of 1.2 mm or less.

  As described above, by using the light extraction structure as a plurality of light reflecting portions, the light extraction amount per area of the light extraction structure can be increased, and the size of the light extraction structure can be reduced. In this case, it is preferable that the size of the plane of each light reflecting portion is a maximum dimension of 1.2 mm or less. Thereby, since the area of the part without the light extraction structure can be increased, the see-through property can be improved.

  Further, since the light reflecting portion hardly transmits light, each light reflecting portion is easily visible when the plane size of the light reflecting portion is larger than the maximum dimension 1.2 mm. On the other hand, when the size of the plane of the light reflecting portion is set to the maximum dimension of 1.2 mm or less, it is possible to prevent each light reflecting portion from being easily visually recognized.

  In the illuminating device of this invention, it is preferable that the coverage with respect to the light guide member in the said light reflection part is 20% or less.

  Since the light reflecting portion hardly transmits light, the light extraction structure becomes easy to be visually recognized when the coverage is increased, and the see-through property is deteriorated. In this respect, by setting the coverage of the light guide member in the light reflecting portion to 20% or less, the light extraction structure becomes difficult to be visually recognized, and the see-through property is improved.

  In order to solve the above-described problems, an illumination system of the present invention is an illumination system including the illumination device described above, and the illumination device is an illumination space that is a main target of illumination and a space other than the illumination space. The first surface of the light guide member is opposed to the non-illumination space, while the second surface of the light guide member is disposed in the illumination space. It is characterized by facing each other.

  According to the above invention, the first surface of the light guide member faces the non-illumination space, while the second surface of the light guide member faces the illumination space. For this reason, the light guided through the inside of the light guide member and reflected by the light reflecting portion formed on the first surface of the light guide member enters the illumination space from the light guide member via the second surface. Emitted. For this reason, the light quantity of the light radiate | emitted to the 2nd surface side, ie, illumination space side, can be increased.

  Therefore, since the emission efficiency to the illumination space that is the main target of illumination can be improved, the utilization efficiency of the light emitted from the light source can be improved.

  In the illumination system of the present invention, the illumination device functions as a window illumination device attached to a window of a building, and the illumination space is in a room provided inside the building, The illumination space is preferably outside the room.

  Thereby, the radiation | emission efficiency to the room | chamber interior of the room which is the illumination space used as the main object of illumination can be improved.

  As described above, the illumination device according to the present invention has a plurality of light reflecting portions having a light extraction structure for extracting light guided inside the light guide member on the first surface of the light guide member. Are scattered and provided.

  Moreover, the illumination system of this invention is an illumination system provided with the above-mentioned illumination device as mentioned above, Comprising: An illumination device is the illumination space used as the main object of illumination, and spaces other than this illumination space. The first surface of the light guide member is opposed to the non-illumination space, while the second surface of the light guide member is opposed to the illumination space. It is what you are doing.

  Therefore, it is possible to provide an illumination device and an illumination system that can improve the emission efficiency of light emitted from the light source in a predetermined direction with a simple structure.

(A) shows one Embodiment of the illuminating device in this invention, Comprising: It is sectional drawing which shows the structure of the illumination module as an illuminating device, (b) is the reflectance of the light reflection pattern of the said illumination module. It is explanatory drawing which shows the analysis result of the light quantity ratio of the emitted light by the 1st surface side (outdoor side) and 2nd surface side (indoor side) of the light-guide plate by. (A) is sectional drawing which shows the principal part structure of the said illumination module, (b) is a front view which shows the whole structure of the said illumination module. It is principal part sectional drawing which shows the structure of LED vicinity in the said illumination module. (A) is sectional drawing which shows the way of the light ray at the time of LED non-lighting in the light guide plate cross section of the said illumination module, (b) is the light ray advancement method at the time of LED lighting in the light guide plate cross section of the said illumination module. FIG. (A) (b) shows other embodiment of the illuminating device in this invention, Comprising: It is sectional drawing which shows the structure of the illumination system at the time of using an illuminating device for a skylight. It shows further another embodiment of the illuminating device in this invention, Comprising: It is a front view which shows the structure of the illumination system at the time of using an illuminating device for a door. (A) is sectional drawing which shows the structure of the conventional illumination system, (b) is sectional drawing which shows the structure of the illuminating device in the said conventional illumination system. It is principal part sectional drawing which shows the structure of the other conventional illuminating device.

[Embodiment 1]
One embodiment of the present invention will be described below with reference to FIGS.

  The lighting device of the present invention can be incorporated into various doors such as a house entrance door, or a door for a store or various facilities. In addition to doors, residential building materials such as partitions, wall surfaces of buildings, floors of buildings, furniture such as cupboards or kitchen storage, windows such as skylights, gateposts, nameplates, fences, signs, It can be incorporated into public exteriors such as bulletin boards, guide lights or handrails.

  Below, especially the illumination module 1 as an illuminating device attached to a skylight or a door is demonstrated as one Embodiment of the illuminating device of this invention.

  Note that the structure in which the lighting device is incorporated may be a structure that is required to guide light from the outside to the inside of the structure or in the opposite direction. Further, the structure may be formed by combining a plurality of illumination modules 1. Furthermore, the illumination module 1 may be realized as a window member that is fitted in a window frame having a rail and is movable along the rail.

[Configuration of lighting module]
The structure of the illumination module 1 of this Embodiment is demonstrated based on Fig.2 (a) (b). FIG. 2A shows an example of the configuration of the illumination module 1, and is a cross-sectional view showing the main configuration of the illumination module 1. FIG. 2B shows the overall configuration of the illumination module 1. It is a front view.

  As shown in FIGS. 2A and 2B, the illumination module 1 is provided to protect the light guide plate 2 as a light guide member provided in the center of the interior, and the front and back surfaces of the light guide plate 2. Protective glasses 3a and 3b, LEDs (Light Emitting Diodes) 4 as light sources, holding members 5 and 5 for holding the portions where the LEDs 4 are provided, and frames 6 and 5 for supporting the entire lighting module 1. 6 and a base portion 7 having a substrate circuit of the LED 4.

  In the present embodiment, the illumination module 1 has, for example, a rectangular shape, and the size thereof is, for example, 600 mm in the vertical direction (height direction: x direction) and the length in the horizontal direction (lateral direction: y direction). The thickness is 600 mm and the thickness (z direction) is 39 mm. However, it is not limited to this. That is, the size and shape of the lighting module 1 may be set according to the size of the skylight or door to which the lighting module 1 is attached, the installation location thereof, and the like. For example, the shape of the illumination module 1 may be circular or elliptical. In addition, the magnitude | size and shape of each member with which the illumination module 1 is provided are not limited to the magnitude | size and shape shown below.

  In the illumination module 1, the light emitted from the LED 4 is guided by the light guide plate 2, and the protective glass 3 a. Opposite to the first surface 2 a and the second surface 2 b, which are the two surfaces of the light guide plate 2. The light is emitted from 3b to the outside of the illumination module 1. However, as will be described later, a large amount of light is emitted to the second surface 2b.

  Below, the detailed structure of each part of the illumination module 1 is demonstrated.

〔Light guide plate〕
Initially, the structure of the light-guide plate 2 is demonstrated based on FIG. FIG. 3 shows a detailed structure of the light guide plate 2 and is an enlarged sectional view showing a portion indicated by P in FIG.

  As shown in FIG. 3, the light guide plate 2 is formed of, for example, a rectangular plate, and includes a first surface 2a that is one surface and a second surface that is the surface opposite to the first surface 2a. Surface 2b.

  In the present embodiment, the size of the light guide plate 2 is substantially the same as the horizontal length of the illumination module 1 with respect to the horizontal length, but the vertical length is at the end thereof. Since the LED 4 is arranged in the vicinity, the LED 4 is designed to be smaller than the vertical length of the illumination module 1 by the amount of the arrangement place of the LED 4. Moreover, although the thickness of the light-guide plate 2 is 3 mm, for example, it is not limited to this.

  The shape of the light guide plate 2 can be freely set in accordance with the shape of the illumination module 1. Moreover, the 1st surface 2a and the 2nd surface 2b can also be set freely, for example, polygons other than a rectangle, circle, etc. may be sufficient. Furthermore, the light guide plate 2 does not necessarily have to be a flat plate having a uniform thickness in the plane, and may be curved.

  The light guide plate 2 is made of a material having translucency. Here, the translucency of the light guide plate 2 means that light is transmitted, that is, transmitted, and does not necessarily mean that the light guide plate 2 is a transparent body. Therefore, as long as the light guide plate 2 transmits light, the appearance may appear milky white, for example. In the present embodiment, since the light guide plate 2 has a transmittance of about 90% with respect to visible light when the LED 4 is not lit, the illumination module 1 with high daylighting can be realized.

  Examples of the material of the light guide plate 2 include glass materials including organic glass made of methacrylic resin or acrylic resin. In addition, a synthetic resin having a high transmittance such as a polycarbonate resin, a polyester resin, or a vinyl chloride resin can be used.

  As shown in FIG. 3, the LED 4 is disposed in the vicinity of the end of the light guide plate 2, that is, the end surface of the side surface other than the first surface 2 a and the second surface 2 b of the light guide plate 2, and the light is emitted from the LED 4. The incident light enters from the end of the light guide plate 2. Such a light incident method is generally referred to as side light incident.

  In the light guide plate 2, the light emitted from the LED 4 is incident and guided to the inside, and is emitted from the first surface 2 a and the second surface 2 b. That is, the 1st surface 2a and the 2nd surface 2b function as an output surface which radiate | emits the light from LED4. Here, in the illumination module 1 of the present embodiment, the light reflection pattern 8 as a light reflection portion is formed on the first surface 2a as a means for extracting a large amount of light guided through the light guide plate 2 to the second surface 2b. Is provided.

[Light reflection pattern]
Here, the plurality of scattered light reflection patterns 8 in the illumination module 1 of the present embodiment will be described with reference to FIG. Fig.1 (a) is sectional drawing which shows the structure of the illumination module as an illuminating device of this Embodiment.

  In the present embodiment, as shown in FIG. 1A, each light reflection pattern 8... Is provided on the first surface 2 a of the two light emitting surfaces of the light guide plate 2. In addition, the light reflection pattern 8 should just be provided in either the 1st surface 2a or the 2nd surface 2b which is two light-projection surfaces of the light-guide plate 2, when using as the illumination module 1 only. . However, when the illumination module 1 is attached to, for example, a skylight or a door, it is preferable to provide the illumination module 1 on the first surface 2a of the light guide plate 2 on the outdoor side in order to emit a large amount of light to the indoor side.

  In this embodiment, a case where a plurality of light reflection patterns 8 are provided on the first surface 2a of the light guide plate 2 will be described.

  Each of the light reflection patterns 8 is made of a material that reflects light in the visible light range, and is provided in a desired pattern. Here, the pattern is not particularly limited, and is designed to meet the specifications of the required lighting device.

  For example, when the light amount distribution in the light emitting surface is made substantially uniform, the coverage of the light reflection pattern 8 in the vicinity of the LED 4 is low, and the surface of the light guide plate 2 is directed to the surface facing the end surface that receives light from the LED 4. So that the coverage is high. In addition, in the case of both-side incident light in which the LEDs 4 are arranged at both ends of the opposite light incident end surfaces of the light guide plate 2, the coverage is increased toward the center of the light guide plate 2.

  Here, the coverage of the light reflection pattern 8 can be adjusted by the following method.

  For example, when using a dot-shaped pattern, change the number of dots per unit area in a dot-shaped pattern of the same size, or arrange the dot-shaped pattern at an equal pitch, and change the size of each dot-shaped pattern It is possible to adjust the amount by adjusting it.

  In addition, when using a line-shaped pattern, a line-shaped pattern having the same line width is arranged, and a method of changing the interval between the line-shaped patterns, or the arrangement of the line-shaped patterns is performed at an equal pitch. For example, a method of arranging by changing the line width is conceivable.

  In the above description, the dot-shaped pattern and the line-shaped pattern have been described. However, the shape of the pattern is not limited to this, and may be a square, a star shape, a meandering line, or the like.

  In addition, when using the illumination module 1 as the illumination device of the present embodiment as the window illumination, it is necessary to see the scenery through the illumination module 1. For this reason, the one where the total coverage of the light reflection pattern 8 is small is preferable, and it is preferable that it is 20% or less. Moreover, since it becomes difficult to visually recognize the one light reflection pattern 8 having a small size, it is preferably φ1.2 mm or less.

  Next, as a method of forming the light reflecting pattern 8, ink containing light reflecting particles may be printed in a desired pattern, or may be ejected and printed on the light guide plate 2 by an ink jet technique. Further, a white paint may be applied in a desired pattern by masking. Further, a light reflective plastic material may be attached to the light guide plate 2 in a desired pattern by laser welding, a transparent optical adhesive, or the like. Alternatively, a metal film having light reflectivity may be formed through a mask having a desired pattern by vapor deposition or the like. Further, a phosphor coating material may be applied to the light guide plate 2.

  As the material of the light reflection pattern 8, a metal material such as silver, aluminum, magnesium carbonate, barium sulfate or aluminum oxide, white PC (polycarbonate), PMMA (acrylate), PET (polyethylene terephthalate), or the like can be considered. These can be used by including a metal vapor deposition material or a particulate material in the ink paint.

[Protective glass]
Protective glasses 3 a and 3 b that protect the light guide plate 2 are provided on both surfaces of the light guide plate 2. Specifically, the protective glass 3a is disposed so as to face the first surface 2a and protects the first surface 2a. Moreover, the protective glass 3b is arrange | positioned facing the 2nd surface 2b, and protects the 2nd surface 2b. That is, the protective glasses 3a and 3b are a pair of flat plates for protecting the light guide plate 2 provided substantially parallel to the first surface 2a and the second surface 2b of the light guide plate 2. As with the light guide plate 2, the protective glasses 3a and 3b are not necessarily flat plates.

  The protective glasses 3a and 3b are fixed to the holding member 5 and the frame 6 via the buffer member 5a by, for example, an adhesive or a double-sided tape. Further, the protective glasses 3 a and 3 b are fixed by the holding member 5 and the frame 6.

  With the above configuration, the light guide plate 2 is not exposed to the outside of the illumination module 1. As a result, it is possible to prevent the light guide plate 2 from being damaged due to damage from external impacts such as wind and rain, or changes in characteristics of the light guide plate 2 due to moisture absorption. In addition, it is possible to prevent the emission efficiency of light emitted from the light guide plate 2 from being lowered due to the entry of dust from the outside. That is, the influence from the outside of the illumination module 1 can be suppressed, and the impact resistance and convenience of the light guide plate 2 can be improved.

  Further, since the protective glasses 3a and 3b are provided in positions facing each other with the light guide plate 2 interposed therebetween and are flat plates, the installation space of the illumination module 1 can be reduced.

  The protective glasses 3a and 3b have translucency or transparency. Therefore, the light emitted from the light guide plate 2 can be emitted to the outside of the illumination module 1.

  The material of the protective glasses 3a and 3b may be any material as long as it has translucency or transparency. For example, the same material as the light guide plate 2 can be used. However, from the viewpoint of protection of the light guide plate 2, that is, impact resistance and durability, it is preferably made of a glass material or a polycarbonate resin. In the case of a glass material, it is more preferable that the glass material has impact resistance such as tempered glass or netted glass, assuming a use environment as a window. The protective glasses 3a and 3b made of a glass material can also be called cover glasses.

  Moreover, in this Embodiment, the magnitude | size of the glass 3a * 3b for protection is substantially the same as the magnitude | size of the illumination module 1 whole, The thickness is 3 mm, for example.

  Further, the protective glasses 3a and 3b may have a function of cutting, for example, UV (UltraViolet: ultraviolet) or IRIR (infrared). Moreover, you may have a film which suppresses scattering of a fragment at the time of glass breakage. When these functions are provided, a more practical lighting module 1 can be realized. In this case, for example, the protective glass 3a, 3b is provided with the above function by vapor-depositing a substance having the above function on the protective glass 3a, 3b or by attaching a film having the above function. Can do.

[LED]
The LED 4 functions as a light source for the illumination module 1. 2A and 3, the LED 4 is provided in the vicinity of the end portion of the light guide plate 2 so that the direction of the light emitting surface (light emission direction) faces the light guide plate 2 side. Has been placed. In the present embodiment, the light emitting surface of the LED 4 is the lower surface, the LED 4 is provided on the substrate 9, and the surface of the substrate 9 opposite to the surface on which the LED 4 is placed is fixed to the base portion 7. . LED4, the board | substrate 9, and the base part 7 are being fixed by the adhesive agent or the double-sided tape etc., for example. In addition, as long as LED4 is arrange | positioned so that the direction of a light emission surface may face the light-guide plate 2, the side emission type light emitting diode may be sufficient. In this case, the substrate 9 on which the LEDs 4 are placed is fixed to the holding members 5 and 5 or the light guide plate 2 itself.

The LED 4 is supplied with electric power via a substrate 9 by a wiring or a connector (not shown).
Regarding the substrate 9 on which the LED 4 is mounted, the surface on which the LED 4 is mounted, that is, the surface on which the light guide plate 2 is mounted efficiently reflects the light emitted from the LED 4 and couples it to the light guide plate 2. Therefore, in order to improve the optical coupling efficiency, white is preferable. In this case, a white resist or the like is generally applied. The mounting surface of the LED 4 does not necessarily need to be white as long as the light emitted from the LED 4 can be efficiently reflected, and may be other light colors.

  In addition, in order to improve the light coupling efficiency, a reflective sheet or the like may be attached to a peripheral portion of the light emitting surface of the LED 4, that is, a part of the holding member 5 positioned around the LED 4. More preferred. The reflective sheet is preferably made of PET (polyethylene terephthalate), PC (polycarbonate) or the like, and has a white appearance and high light reflectivity. However, the reflective sheet may have a mirror surface on which a metal is deposited. Furthermore, a member having a high light reflectance may be used for the holding member 5.

  The LED 4 is not necessarily provided so as to face the upper end portion of the light guide plate 2, that is, the vertically upper side surface when the illumination module 1 is placed in the vertical direction, depending on the use of the illumination module 1. The light guide plate 2 may be provided so as to face the lower end of the light guide plate 2, that is, the side surface on the vertically lower side, or one of the side end portions (both end portions other than the upper end portion and the lower end portion), or all the end portions (all end surfaces). Good. In this case, light from the LED 4 can be introduced from the four sides of the light guide plate 2 at the maximum. In this way, it is possible to select an optimal light incident position as appropriate.

  Moreover, if the light radiate | emitted from LED4 can be reliably introduce | transduced into the light-guide plate 2, LED4 does not need to be provided in the illumination module 1, For example, the building in which the illumination module 1 is attached, specifically May be provided on a roof or door of a building, or a door frame to which the door is attached.

  In addition, the light source of the illumination module 1 is not limited to the LED 4, but a light emitting diode is preferable in consideration of the low power consumption and long life.

[Holding member]
The holding member 5 holds these members on the frame 6 and the base portion 7 constituting the outer frame of the lighting module 1 by sandwiching the light guide plate 2 and fixing the protective glasses 3a and 3b. is there. The holding member 5, the light guide plate 2, and the protective glasses 3a and 3b are fixed with, for example, an adhesive or a double-sided tape. In addition, you may fix these members by providing a screw hole in the predetermined position of the light-guide plate 2 and protection glass 3a * 3b, and tightening a screw | thread.

  As shown in FIG. 3, in the present embodiment, the end portions of the light guide plate 2 and the protective glasses 3a and 3b are fixed to each other by the holding member 5. By fixing the end portion, it is possible to prevent the light from traveling from the first surface 2a and the second surface 2b and the surfaces of the protective glasses 3a and 3b facing them. That is, these members can be fixed without lowering the emission efficiency of light emitted from these surfaces. In addition, in FIG. 3, although the lower end part of the light-guide plate 2 and the glass 3a for protection and 3b is being fixed, not only this but you may fix any edge part. Further, if the emission efficiency is not taken into consideration, it may not be fixed at the end.

  Here, when the light guide plate 2 and the protective glasses 3a and 3b are arranged so as to be in contact with each other, no matter how precisely the light guide plate 2 and the protective glasses 3a and 3b are fixed, There is a high possibility that minute irregularities are formed or bubbles are sandwiched between them. That is, the light guide plate 2 and the protective glasses 3a and 3b cannot be brought into close contact with each other, so that a slight gap is formed between the members. This interference, that is, interference fringes due to nonuniformity of the contact degree. Or light scattering is likely to occur. In this case, the uniformity of the light emitted from the illumination module 1 is impaired.

  In the present embodiment, as shown in FIG. 3, the light guide plate 2 and the protective glass 3a are separated from each other by being fixed by the holding member 5, and the light guide plate 2 and the protective glass 3b are separated from each other. Is provided. That is, the space | interval S which consists of an air layer is formed between each of the light-guide plate 2 and protective glass 3a * 3b. With this configuration, it is possible to prevent the light uniformity as described above from being impaired.

  In order to realize the fixing by the holding member 5 after being separated from each other, in this embodiment, the shape of the holding member 5 is horizontal in the side section in the horizontal direction (FIGS. 2A and 2B). In the y direction).

  If the light uniformity is not taken into consideration, the shape of the holding member 5 may be a shape that can hold the light guide plate 2 and the protective glasses 3a and 3b. The same applies to the size. Further, the holding member 5 is not provided, and the light guide plate 2 and the protective glasses 3a and 3b and the protective glasses 3a and 3b and the frame 6 are directly attached and fixed, for example, with an adhesive or a double-sided tape. May be.

  The material of the holding member 5 is preferably a metal from the viewpoint of nonflammability. Among these, aluminum is more preferable from the viewpoint of lightness and heat dissipation. If these points are not taken into consideration, the material is not particularly limited as long as the material can hold the light guide plate 2 and the protective glasses 3a and 3b, such as acrylic resin.

[Buffer member]
Further, it is preferable to interpose a rubbery or foaming buffer member 5a between the light guide plate 2 and the holding member 5 and between the holding member 5 and the protective glasses 3a and 3b. Examples thereof include silicone rubber or urethane foam having a trade name “PORON (registered trademark)” (manufactured by Roger Sinoac Co., Ltd.). Thereby, sufficient force for the holding member 5 to hold | maintain these members can be given to the said member, without damaging the light-guide plate 2 and protection glass 3a * 3b. That is, the light guide plate 2 and the protective glasses 3 a and 3 b can be reliably fixed by the holding member 5.

〔flame〕
The frame 6 is provided on the outer periphery of the illumination module 1 so as to surround at least the protective glasses 3 a and 3 b, and the protective glasses 3 a and 3 b are sandwiched and held by the frame 6 and the holding member 5. Moreover, the environmental resistance performance of the lighting module 1 can be improved by providing the lighting module 1 with a sealing structure by interposing a sealing material between the frame 6 and the protective glasses 3a and 3b. Moreover, the heat insulation effect of specific spaces, such as a room | chamber interior (indoor) can be heightened by making the illumination module 1 into a sealing structure.

  The material of the frame 6 is preferably a metal like the holding member 5 from the viewpoint of nonflammability, and aluminum is particularly preferable among them from the viewpoint of light weight and heat dissipation.

[Base part]
The base portion 7 is a member on which the holding member 5 and the substrate 9 are installed and fixed. That is, the light guide plate 2 and the protective glasses 3 a and 3 b are fixed to the base portion 7 via the holding member 5, and the LED 4 is fixed to the base portion 7 via the substrate 9.

  The material of the base portion 7 is also preferably a metal, particularly aluminum, like the frame 6. The base portion 7 may be a part of the frame 6 instead of being separated from the frame 6.

[Light emission direction in the lighting module]
As described above, the lighting module 1 of the present embodiment has the LED 4 and the first surface 2a and the second surface 2b facing each other, and guides the light emitted from the LED 4 to guide the first light. And a light guide plate 2 that emits light from the surface 2a and the second surface 2b. For this reason, the light guided through the light guide plate 2 travels in a direction substantially parallel to the surface of the light guide plate 2 and travels through the light guide plate 2 by repeating total reflection on the surface of the light guide plate 2. The total reflection condition is broken by the light reflection pattern 8 as the light extraction structure provided on the first surface 2a, and the light is emitted from the second surface 2b.

  Here, the light extraction structure is a structure that converts an optical path of light to be guided and extracts light to the outside of the light guide plate 2. For example, when the light extraction structure is formed on the first surface 2a that is one surface of the light guide plate 2 with highly transparent irregularities, the light path is converted by scattering in the light extraction structure, and is the opposite surface. Light can be extracted from the second surface 2b. At this time, since the total reflection condition collapses at the same time, there arises a problem that light leaks to the first surface 2a which is one surface through the portion of the light extraction structure. This problem does not pose a problem when a full-surface light reflecting plate can be disposed facing the back surface of the light reflecting portion, that is, the first surface 2a as in a liquid crystal display device. However, in the case of window illumination, since it is necessary to ensure see-through property, the full-surface light reflecting plate cannot be disposed on the first surface 2a that is the back surface of the light guide plate 2, and the first surface 2a. There arises a problem that the light utilization rate of the light source decreases.

  Therefore, in the present embodiment, a plurality of light reflection patterns 8 that are light extraction structures are provided on one surface of the light guide plate 2, that is, the first surface 2a that is the back surface, so that the light extraction structure is made reflective. Yes. Accordingly, light can be efficiently emitted from the second surface 2b without leaking through the light extraction structure and leaking to the first surface 2a which is the one surface of the light guide plate 2, that is, the back surface.

  That is, by making the light extraction structure a plurality of light reflection patterns 8, the light extraction amount per area of the light extraction structure can be increased, and the size of the light extraction structure can be reduced. As a result, since the area of the portion without the light extraction structure can be increased, the see-through property can be improved.

  With reference to FIGS. 4 (a) and 4 (b), a description will be given of how the light beam travels when the LED 4 is not lit and when the LED 4 is lit in the illumination module 1 having the above configuration. 4A is a cross-sectional view showing how the light beam travels on the light guide plate 2 when the LED 4 is not lit, and FIG. 4B shows how the light beam travels inside the light guide plate 2 when the LED 4 is lit. It is sectional drawing. In FIGS. 4A and 4B, the protective glasses 3a and 3b are omitted for simplification.

  When the LED 4 is not lit, as shown in FIG. 4A, when the first surface 2a is irradiated with external light such as sunlight, the external light is transmitted through the light guide plate 2 to the second surface. The light is emitted from 2b.

  On the other hand, when the LED 4 is turned on, as shown in FIG. 4B, the light guide plate 2 guides the light emitted from the LED 4, and the light reflection pattern 8 provided on the first surface 2 a of the light guide plate 2. Is taken out of the light guide plate 2. As will be described later, as shown in FIG. 4B, a large amount of light is transmitted to the second surface 2 b side by the light reflection pattern 8 provided on the first surface 2 a of the light guide plate 2. Emitted. As a result, the lighting module 1 functions as a daylighting window when the LED 4 is not lit, and can illuminate the second surface 2b side of the lighting module 1 when the LED 4 is lit.

[About the amount of emitted light]
Next, based on FIG.1 (b), the emitted light quantity of the illumination module 1 at the time of lighting of LED4 is demonstrated. FIG. 1B shows the amount of light emitted from the first surface 2a side (outdoor side) and the second surface 2b side (indoor side) of the light guide plate 2 based on the reflectance of the light reflection pattern 8 in the illumination module 1. It is explanatory drawing which shows the analysis result of ratio.

  The illumination module 1 of the present embodiment is premised on being arranged so as to partition an illumination space that is a main target of illumination and a non-illumination space that is a space other than the illumination space. For example, when the indoor or indoor side of a building is an illumination space and the outdoor or outdoor side is a non-illumination space, the illumination module 1 is arranged so as to partition the indoor or outdoor. Further, when the light reflection pattern 8 is provided on the first surface 2a of the light guide plate 2, the surface of the protective glass 3a facing the first surface 2a of the light guide plate 2 is in contact with the non-illumination space (the non-illumination space The surface of the protective glass 3b facing the second surface 2b of the light guide plate 2 is disposed so as to be in contact with the illumination space (facing the illumination space). That is, in the illumination module 1, the first surface 2a side of the light guide plate 2 provided with the light reflection pattern 8 among the first surface 2a and the second surface 2b of the light guide plate is a non-illumination space. Be placed.

  As described above, the reason why the lighting module 1 is arranged is as follows.

  That is, as shown in FIG. 4B, when the LED 4 is turned on, the emitted light emitted from the light guide plate 2 is the light reflection pattern 8 provided on the first surface 2a of the light guide plate 2 as described above. Reflected and diffused by This is because the amount of emitted light differs between the first surface 2 a side and the second surface 2 b side of the light guide plate 2 depending on the optical characteristics of the light reflection pattern 8, that is, the reflectance and transmittance.

  Specifically, as shown in FIG. 1B, as the optical characteristics of the light reflection pattern 8, the light quantity ratio of the light exit surface between the first surface 2a and the second surface 2b is 60% reflectivity. When the transmittance is 40%, the light quantity ratio between the two light exit surfaces is approximately 1: 1. Further, when the reflectance of each light reflection pattern 8 is 100%, that is, non-transmission, the light amount ratio between the two light exit surfaces is approximately 1: 9.6. Here, the absorption by the light reflection pattern 8 is not considered.

  As a result, as the optical characteristic of the light reflection pattern 8, the higher the reflectance, the higher the amount of light emitted to the second surface 2b side of the light guide plate 2, and the higher the reflectance to the first surface 2a side. The amount of emitted light can be suppressed. Therefore, the light quantity ratio between the two light emitting surfaces of the light guide plate 2 can be increased. That is, the loss of light emitted to the non-illumination space side can be reduced.

  As described above, in the illumination module 1 of the present embodiment, the light from the LED 4 is guided into the light guide plate 2 to be guided and propagated, and the light reflection pattern provided on the first surface 2 a of the light guide plate 2. 8 is diffused and reflected. For this reason, most of the light is emitted to the second surface 2 b side of the light guide plate 2. Therefore, it is possible to improve the emission efficiency of the light emitted from the LED 4 in a predetermined direction with a simple structure without performing fine processing on the light guide plate 2, and to improve the utilization efficiency of the light. be able to.

  In the illumination module 1 according to the present embodiment, the first surface 2a of the light guide plate 2 has a plurality of light reflection patterns having a light extraction structure for extracting light guided inside the light guide plate 2. 8 are interspersed.

  As a result, light can be efficiently emitted from the second surface 2 b without passing through the light reflection pattern 8 and leaking to the first surface 2 a that is the first surface of the light guide plate 2, that is, the back surface.

  That is, by making the light extraction structure into the plurality of scattered light reflection patterns 8, the light extraction amount per area of the light extraction structure can be increased, and the size of the light extraction structure can be reduced. As a result, since the area of the portion without the light extraction structure can be increased, the see-through property can be improved.

  For this reason, at the time of lighting of LED4, the illumination space side can be illuminated brighter than the non-illumination space side.

  Therefore, it is possible to provide the illumination module 1 that can improve the emission efficiency on the illumination space side with a simple structure, and thus improve the utilization efficiency of the light emitted from the light source.

  Moreover, in the illumination module 1 of this Embodiment, the light reflection pattern 8 has a reflectance of 60% or more. Thereby, when the reflectance of light is at least 60% or more, the amount of light emitted to the second surface 2b which is the surface is larger than the amount of light leakage to the first surface 2a which is the back surface of the light guide plate 2. Increasing the light utilization rate.

  Moreover, in the illumination module 1 of this Embodiment, the light reflection pattern 8 has the ink coating film containing a light reflective particle, the white coating film containing a light reflective particle, a light reflective metal film, or light reflection. Made of plastic material. Thereby, the light extraction structure can be formed with a simple configuration. Moreover, since it is only necessary to spray paint or to apply a metal film or a plastic material, construction is also easy.

  Moreover, in the illumination module 1 of this Embodiment, the magnitude | size of the plane of each light reflection pattern 8 is 1.2 mm or less of maximum dimensions.

  As described above, by providing the light extraction structure with the plurality of light reflection patterns 8, the light extraction amount per area of the light extraction structure can be increased, and the size of the light extraction structure can be reduced. In this case, the plane size of each light reflection pattern 8 is preferably set to a maximum dimension of 1.2 mm or less. Thereby, since the area of the part without the light extraction structure can be increased, the see-through property can be improved.

  Further, since the light reflecting pattern 8 hardly transmits light, each light reflecting pattern 8 is easily visually recognized when the plane size of the light reflecting pattern 8 is larger than the maximum dimension 1.2 mm. On the other hand, by making the plane size of the light reflection pattern 8 the maximum dimension 1.2 mm or less, it is possible to prevent the light reflection patterns 8 from being easily visually recognized.

  Moreover, in the illumination module 1 of this Embodiment, the coverage with respect to the light-guide plate 2 in the light reflection pattern 8 is 20% or less.

  That is, since the light reflection pattern 8 hardly transmits light, the light extraction structure is easily visually recognized when the coverage is increased, and the see-through property is deteriorated. In this respect, by setting the coverage of the light reflection pattern 8 to the light guide plate 2 to 20% or less, the light extraction structure becomes difficult to be visually recognized, and the see-through property is improved.

  In addition, the illumination module 1 of the present embodiment includes the light guide plate 2 and the protective glasses 3a and 3b. The protective glass 3a is provided at a position facing the first surface 2a of the light guide plate 2, and the first A protective glass 3b is provided at a position facing the second surface 2b.

  As a result, it is possible to prevent the light guide plate 2 from being scratched, change in characteristics due to the surrounding environment, decrease in emission efficiency due to dust intrusion, and the like, and thus improve the impact resistance and convenience of the light guide plate 2. be able to.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS. 5 (a) and 5 (b) and FIGS. 6 (a) and 6 (b). The configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  In the present embodiment, an illumination system including the illumination module 1 according to the first embodiment will be described. In addition, the illumination system provided with the illumination module 1 can incorporate the illumination module 1 into, for example, various doors such as a house entrance door, or a door for a store or various facilities. In addition to doors, residential building materials such as partitions, wall surfaces of buildings, floors of buildings, furniture such as cupboards or kitchen storage, windows such as skylights, gateposts, nameplates, fences, signs, It can be incorporated into public exteriors such as bulletin boards, guide lights or handrails.

  In the present embodiment, an illumination system including the illumination module 1 attached to a skylight or a door will be described.

[Lighting system with lighting module on the skylight]
Initially, the specific structure of the illumination system 10 with which the illumination module 1 was provided in the skylight is demonstrated based on Fig.5 (a) (b). FIG. 5A shows the illumination system 10 in which the illumination module 1 is installed as a skylight, and is a cross-sectional view showing a state in which the illumination module 1 is turned off. FIG. 5B is an illumination module. It is sectional drawing which shows the state in which 1 is lighting.

  As shown in FIGS. 5 (a) and 5 (b), in the lighting system 10, the lighting module 1 is disposed on a ceiling 11 (a roof of a building, a roof portion). Located on the outdoor side, the protective glass 3b is located on the indoor side. That is, the illumination system 10 functions as a window illumination device (skylight illumination device) attached to a building window.

  Since the light guide plate 2 and the protective glasses 3a and 3b in the illumination module 1 have translucency, the illumination system 10 functions as a skylight that performs daylighting when turned off. Therefore, as shown to Fig.5 (a), sunlight can be taken in indoors efficiently in the daytime. In addition, the outdoor scenery can be seen from the indoors, day or night. Especially at night, the night sky can be observed.

  On the other hand, at the time of lighting, as shown in FIG. 5B, the light guide plate 2 in the illumination module 1 guides the light emitted from the LED 4 and emits it from the first surface 2a and the second surface 2b. Functions as indoor lighting. Therefore, it is possible to illuminate the interior even when there is no outside light. That is, the illumination system 10 can efficiently illuminate the interior from above (the roof side) while fulfilling the function as a skylight.

  Moreover, since the light reflection pattern 8 is provided on the first surface 2a of the light guide plate 2, the light emitted from the LED 4 is suppressed from being emitted to the outdoor side, and the emission intensity to the indoor side is increased. Yes. Therefore, even if the lighting module 1 is used as indoor lighting, there is little loss.

  Thus, in the illumination system 10, the illumination module 1 is arrange | positioned so that the indoor of the building which is the illumination space used as the main object of illumination, and the outdoor of the building which is a non-illumination space may be partitioned off. The second surface 2b of the light guide plate 2 is in contact with the interior through the protective glass 3b, and the first surface 2a of the light guide plate 2 is in contact with the outdoors through the protective glass 3a.

  Therefore, as shown in FIG. 1B, the light guided through the light guide plate 2 and reflected by the light reflection pattern 8 formed on the first surface 2a of the light guide plate 2 is The light is emitted from the light guide plate 2 to the illumination space via the second surface 2b. For this reason, the light quantity of the light radiate | emitted to the 2nd surface 2b side, ie, the illumination space side, can be increased.

  Therefore, in the illumination system 10, the illumination module 1 used as a skylight can improve the emission efficiency to the indoor which is the main target of illumination, and can improve the utilization efficiency of the light emitted from the LED 4. it can.

  Moreover, in the illumination system 10 of this Embodiment, the illumination module 1 functions as a window illumination apparatus attached to the window of a building, and illumination space is the room | chamber interior provided in the inside of a building. Yes, the non-illuminated space is outside the room. Thereby, the radiation | emission efficiency to the room | chamber interior of the room which is the illumination space used as the main object of illumination can be improved.

  Moreover, in the illumination system 10, when the illumination module 1 is used as a skylight, the light guide plate 2 is more susceptible to fluctuations in temperature, humidity, and the like, wind and rain, and the like than when used indoors. However, in the illumination system 10, since the protective glass 3a is provided on the side in contact with the outdoors, the light guide plate 2 can be reliably protected. That is, the illumination system 10 can be suitably used for an illumination module to which an impact is applied from the outside.

  Moreover, in the illumination system 10 of this Embodiment, since the structure of the illumination module 1 is simple, the structure of the illumination system 10 also becomes simple. Therefore, like the conventional illumination device 100 disclosed in Patent Document 1, the skylight disposed on the upper surface of the light guide plate has a complicated slope structure, and the structure as the illumination device including the skylight is complicated. It will never be.

  The lighting system 10 is not only a residential skylight shown in FIGS. 5 (a) and 5 (b), but also daylighting and nighttime lighting such as skylights of general commercial facilities, skylights of public facilities, and other windows. It can be employed in parts where the above effect is required.

  For example, by installing or sticking a see-through solar cell on the outdoor side with respect to the lighting module 1, daylighting and power generation can be performed during the daytime, and the generated power during the daytime can be used as illumination. Furthermore, it is possible to contribute to low power consumption by collecting the lost light leaking to the outdoor side with a solar cell.

  In addition, for example, the lighting module 1 can be attached to all or a part of a mirror installed in a washstand, a bathroom, or the like. Thereby, since it is transparent at the time of light extinction, the function as a normal mirror is not hindered. Furthermore, when the lighting is turned on, the pasting portion functions as surface illumination, so that it is possible to provide a function as illumination that can irradiate light from the nearest position to a portion that is desired to be viewed with a mirror.

  Moreover, when the illumination module 1 functions as the illumination system 10 which is a window illumination device attached to a window, the emission efficiency can be improved while maintaining the lighting performance of a conventional window, that is, good lighting performance.

[Lighting system with lighting module on the door]
Next, a specific configuration of the lighting system 20 in which the lighting module 1 is used for a door will be described with reference to FIG. FIG. 6 is a front view showing a configuration of a lighting system 20 (lighting device, window lighting device) in which the lighting module 1 is installed on a door.

  As shown in FIG. 6, in the lighting system 20, the door 21 includes a door main body 22 and a knob 23, and further includes the lighting module 1 at a predetermined position of the door main body 22. Since the door body 22 and the knob 23 are well-known structures, the description thereof is omitted.

  That is, the illumination system 20 functions as a window illumination device. Although not shown, the first surface 2a of the light guide plate 2 provided with the light reflection pattern 8 is located on the outdoor side or the outdoor side, while the second surface 2b facing this is the indoor side or the room side. Located inside.

  The door 21 is provided at, for example, a building entrance, a doorway, each room, a hallway, or the like. Therefore, when the lighting system 20 is provided on the door 21 for entrance or entrance, it is installed so as to partition the indoor and outdoor of the building, and is provided on the door 21 for each room or hallway. If it is, it can be said that it is installed so as to partition the room inside the building and the outside of the room.

  In the lighting system 20, the lighting module 1 functions as a window for a door that performs daylighting when turned off, and functions as indoor lighting or indoor lighting when turned on. Therefore, it is possible to illuminate the room or the room even when there is no outside light. Furthermore, since the light reflection pattern 8 is provided on the first surface 2a of the light guide plate 2, the light emitted from the LED 4 is suppressed from being emitted to the outdoor side or the outdoor side, and the indoor side or the indoor side. Increasing the emission intensity. Therefore, even if the lighting module 1 is used as indoor lighting, there is little loss.

  Thus, in the illumination system 20, the illumination module 1 is disposed so as to partition the illumination space that is the main target of illumination and the non-illumination space that is a space other than the illumination space. The first surface 2a faces the non-illumination space, while the second surface 2b of the light guide plate 2 faces the illumination space. The lighting module 1 functions as a window lighting device attached to a window of a building. The lighting space is a room provided in the building, and the non-lighting space is outside the room. It is.

  Thereby, the illumination module 1 used as a window for a door can improve the emission efficiency to the room interior which is the illumination space which is the main object of illumination, and the utilization efficiency of the light emitted from the LED 4 can be improved. Can be improved.

  Moreover, in the illumination system 20 of this Embodiment, the illumination module 1 functions as a window illumination apparatus attached to the window of a building, and illumination space is the room | chamber interior provided in the inside of a building. Yes, the non-illuminated space is outside the room. Thereby, the radiation | emission efficiency to the room | chamber interior of the room which is the illumination space used as the main object of illumination can be improved.

  In the lighting system 20, the lighting module 1 does not necessarily have to be attached to the door 21, and may function as a window such as a building or a cupboard, for example.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

  The lighting device and the lighting system of the present invention include various doors such as a house entrance door, doors for shops and various facilities, residential building materials (partitions, etc.) other than doors, wall surfaces and floor surfaces of buildings, It can be incorporated into furniture such as cupboards and kitchen storage, windows (skylights), gateposts, nameplates, and public exteriors (fences, signs, bulletin boards, guide lights, handrails).

1 Lighting module (lighting device)
2 Light guide plate (light guide member)
2a 1st surface 2b 2nd surface 3a Glass for protection 3b Glass for protection 4 LED (light source)
5 Holding member 5a Buffer member 6 Frame 7 Base portion 8 Light reflection pattern (light extraction structure, light reflection portion)
DESCRIPTION OF SYMBOLS 10 Lighting system 11 Ceiling 20 Lighting system 21 Door 22 Door main body 23 Knob

Claims (7)

A light source; and a light guide member that has a first surface and a second surface facing each other, guides light emitted from the light source, and emits the light from the first surface and the second surface. In the lighting device
The first surface of the light guide member is provided with a plurality of light reflecting portions that are light extraction structures for extracting light guided inside the light guide member. A lighting device.   The lighting device according to claim 1, wherein the light reflecting portion has a reflectance of 60% or more.   The light reflecting portion is made of an ink coating including light reflecting particles, a white coating including light reflecting particles, a light reflecting metal film, or a light reflecting plastic material. The lighting device according to claim 1 or 2.   The lighting device according to claim 1, 2, or 3, wherein a plane size of each of the light reflecting portions is a maximum dimension of 1.2 mm or less.   The illumination device according to any one of claims 1 to 4, wherein a coverage of the light guide member in the light reflecting portion is 20% or less. It is an illumination system provided with the illuminating device of any one of Claims 1-5,
The lighting device is arranged so as to partition an illumination space that is a main target of illumination and a non-illumination space that is a space other than the illumination space,
While the first surface of the light guide member faces the non-illuminated space,
The illumination system, wherein the second surface of the light guide member faces the illumination space. The lighting device functions as a window lighting device attached to a building window,
The lighting space is a room in a room provided inside the building,
The lighting system according to claim 6, wherein the non-lighting space is outside the room.

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