JP2018032526A - Lighting module and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting module which can uniformize luminance of the entire light emission surface even further, when a plurality of lighting modules are arranged in parallel.SOLUTION: A lighting module 10 includes an outer case 100, a light guide plate 200, a light source 300 and a light diffusion plate 400. In the lighting module 10, a projection strip part 410 which projects to the light guide plate 200 side and which has a second light incident surface FI2 in which the light emitting from a peripheral edge part 220 of a first light emission surface FE1 of the light guide plate 200 enters is provided on the diffusion plate 400. The lighting module has a tapered part 440 which is inclined toward a central part 430 side of the diffusion plate 400 as it goes from the front side to the rear side of the lighting module 10, in a diffusion plate side part 460, and also, an end part 420 of the diffusion plate 400 protrudes further to the outside than a side part outside surface 122 of the outer case 100 in a plan view. Also, at the tapered part 440, light control means 500 is provided capable of performing at least one of absorption, reflection and diffusion of light.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a lighting module and a lighting device.

  2. Description of the Related Art Conventionally, there is known an illumination module that does not become dark as a peripheral portion of a light exit surface of a diffuser is trimmed when the light exit surface is viewed from the front side (see, for example, Patent Document 1). .

FIG. 12 is a cross-sectional view for explaining a conventional lighting module 900.
As shown in FIG. 12, the conventional lighting module 900 is housed in an outer case 910 having a bottom portion 911 and a side portion 912 provided so as to surround the bottom portion 911, and an inner region of the outer case 910. A light guide plate 920 having a light emission surface FE1, a light source 930 arranged to face the end surface 921, and emitting light toward the end surface 921, a first light emission surface FE1 side of the light guide plate 920, and a first A diffusion plate 940 having a first light incident surface FI1 on which light emitted from the light emitting surface FE1 is incident and a second light emitting surface FE2 on which light incident from the first light incident surface FI1 is emitted. At 940, the peripheral portion 922 on the end surface 921 side that protrudes toward the light guide plate 920 and faces at least the light source 930 among the peripheral portion 922 of the first light exit surface FE 1 of the light guide plate 920. Located in a position opposed to ridge 941 has a configuration provided that light emitted from the first light emitting surface periphery 922 of the FE1 has a second light incident surface FI2 incident.

  According to the conventional illumination module 900, the light incident on the second light incident surface FI2 of the ridge 941 is reflected and scattered inside the ridge 941, and is emitted as scattered light from the peripheral edge of the diffuser plate 940. Will be. Providing the ridges 941 in this way prevents the peripheral edge of the second light exit surface FE2 from becoming dark as if it was edged, and the entire second light exit surface FE2 (light exit surface) including the peripheral edge. Can be homogenized (see, for example, [0046] to [0047] in Patent Document 1).

  In addition, as described above, since the luminance of the entire light exit surface can be equalized with a single illumination module in the prior art, a plurality of conventional illumination modules 900 are arranged in parallel (parallel arrangement), It is also possible to configure a lighting device having a light emitting surface with a wider area.

JP 2014-150049 A

  FIG. 13 is a cross-sectional view for explaining the problem of bright lines that may occur when a conventional lighting device 950 is configured by arranging a plurality of conventional lighting modules 900 in parallel. In FIG. 13, only the main parts (a part of the diffusion plate 940 and the outer case 910) are shown, and the other components are not shown.

In FIG. 12, the side outer surface 914 of the outer case 910 and the outermost peripheral portion 942 of the diffusion plate 940 are in a so-called flush state.
However, as shown in FIG. 13, when the conventional lighting module 900 is actually mass-produced, the outer side surface 914 of the outer case 910 may protrude outward from the outer peripheral portion 942 of the diffusion plate 940 due to manufacturing variations. is there. When a plurality of such illumination modules 900 ′ are arranged in parallel, the outer peripheral portions 942 of the diffusion plates 940 of the adjacent illumination modules 900 ′ do not adhere to each other, and a gap is generated between the adjacent diffusion plates 940. There is. In this case, when the light emitting surface is viewed from the front surface of the illumination device 950, there arises a problem that the illumination light LA leaking from the gap appears as a bright line (problem of the bright line leaking from the gap).

  The present invention has been made in view of the above circumstances, and provides an illumination module capable of further equalizing the luminance of the entire light exit surface including the peripheral portion of the diffusion plate when a plurality of illumination modules are arranged in parallel. For the purpose.

[1] An illumination module of the present invention includes an outer case having a bottom part and a side part provided so as to surround the bottom part, a light guide plate housed in the outer case and having an end face and a first light emitting surface, A light source arranged so as to face the end surface and emitting light toward the end surface, and a light source arranged on the first light emitting surface side of the light guide plate and incident from the light emitted from the first light emitting surface A diffusion plate having a first light incident surface and a second light emitting surface from which light incident from the first light incident surface is emitted, the diffuser plate protruding toward the light guide plate, and the light guide plate Second light incident on which light emitted from the peripheral portion of the first light emitting surface is incident at a position facing at least the peripheral portion on the end face side facing the light source in the peripheral portion of the first light emitting surface Illumination module provided with a ridge having a surface The outermost outer peripheral portion of the diffusion plate protrudes outward from the outer side surface of the exterior case, and is in a direction perpendicular to the second light exit surface of the diffusion plate and the exterior When the direction from the bottom side of the case toward the second light emitting surface side is the first direction, and the direction opposite to the first direction is the second direction, the diffusion plate proceeds in the second direction. The diffusion plate has a tapered portion that is inclined toward the central portion side of the diffusion plate, and the taper portion is capable of performing at least one of light absorption, reflection, and scattering. A light means is provided.

  In the illumination module of the present invention, the outermost outer peripheral portion of the diffuser plate protrudes outward from the outer side surface of the outer case, and the diffuser plate moves toward the center of the diffuser plate in the second direction. The taper part which inclines toward has has in the diffusion plate side part. Therefore, when a plurality of lighting modules are arranged in parallel, even if the positional relationship between the outer case and the diffusion plate varies somewhat in manufacturing, there is no gap between adjacent diffusion plates. Can be solved, and as a result, the luminance of the entire light exit surface can be contributed to the homogenization.

Further, according to the illumination module of the present invention, since the light control means is provided at the tapered portion of the side portion of the diffuser plate, when light enters the light control means through the taper portion from the inside of the ridge portion, the light control is performed. The means performs at least one of absorption, reflection and scattering of light. The amount of light emitted to the outside from the light control means can be adjusted by light absorption performed in the light control means. Further, the amount of light from the opposite direction, that is, the amount of light incident from the outside of the tapered portion of the illumination module can be adjusted in the same manner.
Therefore, even when a plurality of illumination modules are arranged in parallel, the amount of light that passes between the diffusion plates of adjacent illumination modules can be adjusted.
In this way, the dimming means provided in the tapered portion can alleviate the influence of the light incident from the adjacent illumination module, so that the brightness of the adjacent portion (such as the peripheral portion of the diffusion plate) is increased. As a result, it is possible to suppress luminance unevenness caused by the above, and to contribute to equalization of the luminance of the entire light exit surface.

  However, according to the illumination module of the present invention, when a plurality of illumination modules are arranged in parallel, it is possible to provide an illumination module that can further homogenize the luminance of the entire light emitting surface including the peripheral portion of the diffusion plate. .

[2] In the illumination module of the present invention, the light control means is a tape having a light control layer capable of performing at least one of light absorption, reflection and scattering, and the tape is bonded to the taper portion. It is preferable to be made.

  According to such a dimming means using a tape, the degree of light absorption, reflection and scattering can be achieved by appropriately changing the width, length, installation location, etc. of the tape or by appropriately changing the material of the dimming layer. Can be adjusted easily.

[3] In the illumination module of the present invention, the light control means is a coating material capable of performing at least one of light absorption, reflection, and scattering, and the coating material is coated on the tapered portion. It is preferable.

  According to such a configuration, since the coating material is coated on the tapered portion, it is possible to form a dimming means having a better fixability to the tapered portion, and to obtain a lighting module with more durability. be able to.

[4] In the illumination module of the present invention, it is preferable that the dimming means is constituted by a portion where the surface of the tapered portion is roughened.

  Since the dimming means is constituted by a portion where the tapered portion itself is processed and the surface of the tapered portion is roughened, the illumination module is more durable. In addition, since an additional member is not required, it is possible to obtain an illumination module with reduced member cost.

[5] In the illumination module of the present invention, it is preferable that the reflectance of the light control means on the inner side of the diffusion plate is higher than the reflectance of the light control means on the outer side.

  According to such a structure, the light which is going to be emitted from the inside of the diffusion plate through the tapered portion can be reflected back to the inside of the diffusion plate again. Therefore, even if it is a case where it is recognized that the brightness | luminance of the peripheral part of a diffuser plate is lower than the brightness | luminance of the center part side, the fall of the brightness | luminance of the peripheral part of a diffuser plate centering on a protruding item | line part can be prevented.

[6] A lighting device of the present invention includes a plurality of the lighting modules according to any one of [1] to [5], and each of the lighting modules has a side of the diffuser plate between the lighting modules adjacent to each other. The at least one tapered portion of the diffusion plate side portion that is disposed in contact with at least a part of the side of the diffusion plate is capable of performing at least one of light absorption, reflection, and scattering. A light means is provided.

The lighting device of the present invention uses a plurality of lighting modules configured such that the outermost outer peripheral portion of the diffusion plate protrudes outside the side outer surface of the exterior case, and each lighting module is adjacent to each other. At least a part of the diffusion plate side part of the lighting modules to be in contact with each other is disposed. In addition, at least one of the tapered portions is provided with a light control means capable of performing at least one of light absorption, reflection, and scattering.
For this reason, while having a light emitting surface of a larger area, there is no gap between the diffuser plates of adjacent illumination modules, and the entire light output surface composed of a plurality of illumination modules including the peripheral portion of the adjacent diffuser plate It is possible to obtain a lighting device with more uniform luminance.

[7] In the illuminating device of the present invention, the dimming means is provided in the tapered portion only at the diffusion plate side portion in contact with any one of the two illumination modules. Preferably it is.

  Since the dimming means is provided only on the side of the diffusion plate where one of the lighting modules abuts, a lighting device with a lower manufacturing cost can be obtained.

[8] In the illuminating device of the present invention, it is preferable that the dimming means is provided in each of the tapered portions in each of the diffusion plate side portions of the two adjacent illumination modules that contact each other.

Since the dimming means is provided at the respective diffusion plate side portions where the two adjacent illumination modules abut each other, the dimming means is provided only at the diffusion plate side portion where either one of the illumination modules abuts. Thus, the adjustment of the amount of light emitted and incident from the side portion (including the tapered portion) of the diffusion plate can be more emphasized.
For example, when it is recognized that the luminance of the peripheral portion of the diffusion plate is too high than the luminance of the central portion side (main emission surface), in each diffusion plate side portion where two adjacent illumination modules abut each other By providing the light control means, it is possible to strongly suppress the luminance of the peripheral edge of the diffuser plate, and to uniformize the luminance of the entire light exit surface of the lighting device.

It is a figure shown in order to demonstrate the illumination module 10 which concerns on Embodiment 1. FIG. It is a figure shown in order to demonstrate the illumination module 10 which concerns on Embodiment 1. FIG. It is a figure shown in order to demonstrate the various aspects of the light control means 500 in Embodiment 1. FIG. It is a figure shown in order to demonstrate the illumination module 10 and the illuminating device 50 which concern on Embodiment 1. FIG. FIG. 5 is a diagram for illustrating an example of a light traveling route (optical path) in the light guide plate 200 and the diffusion plate 400 in Embodiment 1 and actions and effects of the light control means 500. It is a figure shown in order to demonstrate the illuminating device 50a which concerns on Embodiment 2. FIG. It is a figure shown in order to demonstrate the illuminating device 50b which concerns on Embodiment 3. FIG. It is a figure shown in order to demonstrate the light control means 500d in the modification 1. FIG. It is a figure shown in order to demonstrate the light control means 500e in the modification 2. It is a figure shown in order to demonstrate the illumination module 10u which concerns on the modification 3, and the illuminating device 50u. It is a figure shown in order to demonstrate the illumination module 10v which concerns on the modification 4, and the illuminating device 50v. It is a figure shown in order to demonstrate the conventional illumination module 900. FIG. It is a figure shown in order to demonstrate the problem of the bright line which may arise when the illuminating device 950 is comprised by arrange | positioning several conventional illumination modules 900 in parallel.

  Hereinafter, the illumination module and illumination device of the present invention will be described in detail based on the embodiments shown in the drawings. Each figure is a schematic diagram, and the display of dimensions, angles, and the like of each component does not necessarily reflect the actual thing. Furthermore, for the constituent elements common to the prior art, the same means as those described in Patent Document 1 can be employed. The description of Patent Document 1 can be used for a detailed description of the configuration and functions of such components.

[Embodiment 1]
1. Basic Configuration of Illumination Module 10 According to Embodiment 1 FIGS. 1 and 2 are views for explaining the illumination module 10 according to Embodiment 1. FIG. In the following description, the direction of the illumination module 10 and the direction perpendicular to the second light exit surface FE2 is defined as the first direction or the front (front side), and the opposite direction is defined as the second direction or the rear. The description will be given as (rear side). FIG. 1 is a front view of the illumination module 10 as viewed from the front. FIG. 2A is an enlarged cross-sectional view showing a main part of the illumination module 10, and shows a cross section taken along a cutting line II-II shown in FIG. FIG. 2B is a view of the light control means 500 (light control means using a tape) viewed from the wide surface side. FIG. 2C is a cross-sectional view showing cross sections of the light control means 500 and the adhesive layer 670.

  As shown in FIG. 1, the illumination module 10 according to the first embodiment is also referred to << FIG. 2 (a). >> The shape seen from the front is a quadrangle having four sides, and is a flat and flat plate shape that is thin in the front-rear direction. Illumination light with uniform luminance is emitted from a second light emission surface FE2 (described later). The second light exit surface FE2 is roughly divided into a peripheral edge portion 425 and a central portion 430 side other than the peripheral edge portion 425. On the rear surface side of the peripheral edge portion 425 of the diffusion plate 400, as shown by a dotted line in FIG. 1, a protruding strip portion 410, a tapered portion 440, a light source 300 (a part of which is shown in FIG. 1) and the like are provided. Yes.

The illumination module 10 according to the first embodiment includes at least an exterior case 100, a light guide plate 200, a light source 300, a diffusion plate 400, and a dimming unit 500, as shown in FIG.
In addition, you may give the printing pattern 600 to the surface of the 2nd light-projection surface FE2 of the diffusion plate 400 (this is the same also in another embodiment and another figure).

  The outer case 100 mainly covers the rear side of the lighting module 10, and includes a bottom portion 110 and side portions 120 that are provided so as to rise from the periphery of the bottom portion 110 and surround the bottom portion 110. In the first embodiment, side portions 120 are provided on all four sides. The outer case 100 may be formed of any material and method as long as the function and effect of the present invention are not hindered. In the first embodiment, the outer case 100 is formed by bending a thin metal plate.

  The light guide plate 200 guides the light incident from the end face 210 with a planar spread, has a flat plate shape, and has the end face 210 and the first light emission face FE1. The light guide plate 200 is made of, for example, an acrylic resin having a relatively high light transmittance, and includes light scattering particles therein as necessary. The end surface 210 may be configured in a straight line so as to form an outer peripheral side of the light guide plate 200 when the light guide plate 200 is viewed from the front. Further, a part of the side of the illumination module 10 is partially recessed toward the central portion 430 (not shown), and the light source 300 is disposed in the recessed recess, and the surface facing the recessed recess. May be configured as the end face 210. The light guide plate 200 is housed in “inside the exterior case 100”, which is a space surrounded by the bottom 110 and the side portions 120 of the exterior case 100.

The light source 300 emits light for illumination, is arranged so as to face the end surface 210 of the light guide plate 200 described above, and emits light toward the end surface 210.
In the first embodiment, an LED is employed as the light source 300. A plurality of LEDs (light sources 300) are mounted on the flexible substrate 350. The flexible substrate 350 is housed and disposed on the inner surface of the light source frame 370. The light source frame 370 is formed with a fixing portion 372, a side portion 373, and a shielding portion 374 by bending or the like. The light source frame 370 is disposed along the inner surface of the side portion 120 of the outer case 100.

  The reflection sheet 250 reflects the light leaked to the rear surface side of the light guided to the light guide plate 200 to the front side (light emission surface side), and the reflectance is compared with, for example, an aluminum foil. The light guide plate 200 is formed so as to be in close contact with the entire rear surface. Instead of the reflection sheet 250, a reflection coat may be formed on the rear surface side of the light guide plate 200.

  The diffusing plate 400 is disposed on the first light exit surface FE1 side (front side) of the light guide plate 200, and the first light entrance surface FI1 on which light emitted from the first light exit surface FE1 enters and the first light entrance surface. A second light exit surface FE2 from which light incident from FI1 exits is provided. The diffusing plate 400 may be any material as long as the luminance distribution of light is uniform. In the first embodiment, the light diffusing light guide contains a large number of light scattering particles (not shown). The body is used.

  Further, the diffusing plate 400 is provided with a ridge portion 410. The ridge 410 is provided on the peripheral edge 425 of the diffusion plate 400. Specifically, the peripheral edge on the end face 210 side facing at least the light source 300 in the peripheral edge 220 of the first light exit surface FE1 of the light guide plate 200. It is located at a position facing the portion 220. The thickness of the ridge 410 is thicker than the thickness in the vicinity of the central portion 430 of the diffusion plate 400 and protrudes toward the light guide plate 200 (rear surface). The convex portion 410 has a second light incident surface FI2, and light emitted from the peripheral portion 220 of the first light emitting surface FE1 of the light guide plate 200 is incident on the second light incident surface FI2.

  In the illumination module 10 according to the first embodiment, the shielding part 374 is provided at a position facing the second light incident surface FI2. Due to the presence of the shielding part 374, the light emitted from the light source 300 does not directly enter the second light incident surface FI2 (such a shielding region B is set). Therefore, light enters the second light incident surface FI2 from the light guide plate 200 through the incident region C other than the shielding region B. In addition, although the shielding part 374 may be comprised by what kind of means, in Embodiment 1, it is comprised by bending the light source frame 370 and projecting the front side inside. Further, the ratio between the shielding area B and the incident area C can be set and changed in accordance with the luminance of light emitted from the light source 300, the luminance aimed at the ridge 410, and the like. When it is desired to increase the value, the setting may be changed so as to decrease the ratio of the shielding area B to the incident area C.

  In the exterior case 100, the light guide plate 200, the reflection sheet 250, and the main frame 650 are accommodated in this order from the front side to the rear side of the illumination module 10. The peripheral portions of the light guide plate 200, the reflection sheet 250, and the main frame 650 are disposed so as to be sandwiched between the fixing portion 372 of the light source frame 370 and the shielding portion 374 of the light source frame 370.

  A plurality of screws 130 (see FIG. 4 for the screws 130) and 132 are fitted along the side of the lighting module 10 at an appropriate interval at the bottom 110 of the outer case 100. The screw 132 is disposed slightly closer to the center portion 430, passes through a screw hole (not shown) in the bottom portion 110 of the outer case 100, and is screwed into the main frame 650. The screw 130 is disposed at the peripheral edge 425 and penetrates through screw holes (reference numerals omitted) formed in the bottom 110 of the exterior case 100, the light source frame 370, the main frame 650, the reflection sheet 250, and the light guide plate 200, respectively. The outer casing 100, the light source frame 370, the main frame 650, the reflection sheet 250, the light guide plate 200, and the diffusion plate 400 are fastened by being screwed into the protruding strip 410 of the diffusion plate 400.

2. Detailed Configuration of Lighting Module 10 According to Embodiment 1 (1) Tapered Part 440
In addition to the basic configuration described above, the illumination module 10 according to Embodiment 1 has a tapered portion 440 at the side portion (the diffusion plate side portion 460) of the diffusion plate 400, as shown in FIG. . The tapered portion 440 is formed so as to be inclined toward the central portion 430 side of the diffusion plate 400 as it proceeds from the front side (second light emission surface FE2 side) of the illumination module 10 to the rear side (exterior case 100 side). Yes.
The position where the taper shape starts in the front-rear direction of the diffusion plate 400 is a position that is almost the same as the end portion 420 that is the outermost outer peripheral portion of the diffusion plate 400 or is slightly shifted to the rear side. The leading edge 442 of the tapered portion is used. A position where the taper shape ends is defined as a taper portion trailing edge 444. The tapered portion 440 is formed from the tapered portion leading edge 442 to the tapered portion trailing edge 444 so as to be inclined toward the central portion 430 side of the diffusion plate 400 as it proceeds from the front side to the rear side of the lighting module 10. .
The tapered portion 440 is preferably configured in a planar shape. By making it planar, it becomes easy to bond, apply, etc., the light control means 500 described later to the taper part 440, and the fixing property to the taper part 440 of the light control means 500 can be improved. On the contrary, when the taper portion 440 is a curved surface and the optical characteristics are improved, the tapered portion 440 may be formed in a curved surface shape.

(2) End portion 420 of diffusion plate 400
Further, in the lighting module 10, when the diffusion plate 400 is viewed in the second direction, the end portion 420 that is the outermost outer peripheral portion of the diffusion plate 400 protrudes outward from the side outer surface 122 of the exterior case 100. << See Fig. 2 (a). >> That is, the end portion 420 located in front of the tapered portion 440 protrudes outward from the side outer surface 122 of the exterior case 100.
The end portion 420 is the outermost outer peripheral portion of the diffusion plate 400 as described above. In other words, the “end portion 420” of the diffusion plate 400 refers to the end portion of the outer periphery that forms the contour of the diffusion plate 400 when the diffusion plate 400 is viewed from the front toward the second direction. Here, “inside” refers to a side from the end 420 of the illumination module 10 toward the center of the second light exit surface FE2 when the illumination module 10 is viewed from the front in the second direction. "Refers to the opposite side of the" inner side ".

  When the entire side of the diffusion plate 400 (diffusion plate side 460) in the first embodiment is observed as a whole, first, a curved surface 427 that is rounded so as to continue from the second light exit surface FE2 toward the rear is formed. Has been. Subsequently, a vertical surface 420A perpendicular to the second light emission surface FE2 is formed. Subsequently, a tapered portion 440 is formed. The tapered portion 440 is formed from the tapered portion leading edge 442 to the tapered portion trailing edge 444 so as to incline toward the central portion 430 side of the diffusion plate 400 as it proceeds from the front side to the rear side. And the taper part rear edge 444 of the taper part 440 is in contact with the edge part of the front side of the side part 120 of the exterior case 100 << refer to Fig.2 (a). >> At this time, when the diffusion plate 400 is viewed from the front, the position of the vertical surface 420 </ b> A becomes the outer peripheral edge forming the outline of the diffusion plate 400. Therefore, in this case, the position of the vertical surface corresponds to “the end 420 of the diffusion plate 400”.

(3) Light control means 500
(A) Attaching the Light Control Unit 500 In addition to the above-described configuration, the taper portion 440 is further provided with a light control unit 500 that can perform at least one of light absorption, reflection, and scattering. See 2 (a). >>

The dimming means 500 is constituted by a tape having a dimming layer 510 capable of performing at least one of light absorption, reflection, and scattering, and is bonded to the tapered portion 440 by an adhesive layer 670 (FIG. 2). See (b) and FIG. 2 (c). >>
According to the dimming means 500 using such a tape, the degree of light absorption, reflection and scattering can be easily adjusted by appropriately changing the material of the dimming layer 510, and the width and length of the tape can be adjusted. The amount of light emitted from the diffusion plate side portion 460 and the amount of incident light can be easily adjusted by appropriately changing the installation location and the like. Therefore, the lighting module 10 can perform dimming with more flexibility.

In the first embodiment, the adhesive layer 670 is first disposed on the tapered portion 440, and then the tape (light control layer 510) is urged against the adhesive layer 670, and finally the tape (light control layer 510) is tapered. Adhere to part 440. In the first embodiment, a tape-shaped adhesive layer 670 is used, but the adhesive layer 670 is not limited to this, and for example, a sol-shaped or gel-shaped one may be used.
In the first embodiment, the adhesive layer 670 has been described on the premise that the adhesive layer 670 is separate from the tape (light control layer 510). However, the present invention is not limited to this. The tape (light control layer 510) and the adhesive layer 670 may be integrally formed in advance, and the tape (light control layer 510) and the adhesive layer 670 may be integrally attached to the tapered portion 440.

  In the first embodiment, the adhesive layer 670 is formed of a transparent material that does not absorb or reflect light. However, the present invention is not limited to this, and the light absorbing or reflecting material may be used. When the adhesive layer 670 has light absorption, reflection, or scattering, the degree of light absorption, reflection, and scattering of the light control means 500 depends on the light absorption of the light control layer 510 and the adhesive layer 670. Each material is selected in consideration of reflectivity and scattering properties. That is, the adhesive layer 670 may be configured as a part of the light control means 500.

When the light control means 500 is configured by a tape, any member, configuration, or the like may be employed as long as the tape exhibits the functions and effects of the first embodiment. For example, a fabric tape that is relatively clogged with fibers such as acetate, and may be a black fabric tape. By employing such a member, it is possible to obtain a light control means 500 that mainly absorbs light and has a high light shielding property. In addition, since it is a fabric, it can be easily adapted to the shape of the tapered portion 440 serving as the adherend surface, and the light control means 500 can be reliably fixed to the tapered portion 440.
In addition, for example, an organic compound film may be employed as the light control layer 510.
Furthermore, the light control layer 510 may be formed as a uniform surface with a closed eye, or formed in a state where it is not uniform and partially has holes, for example, formed in a mesh shape or a slit shape. It may be what was done.

(B) Aspect for Absorbing Light FIG. 3 is a diagram for explaining various aspects of the light control means 500 in the first embodiment. In the figure, arrows QL 1, QL 2, QL 3, QL 4, and QL 5 are for illustratively explaining a part of the light that travels within the convex strip 410. The direction of the arrow indicates the traveling direction of the light, and the thickness of the arrow is a convenience for explaining the intensity of the light. In the following description, the light indicated by arrows QL1, QL2, QL3, QL4, and QL5 will be referred to as light QL1, light QL2, light QL3, light QL4, and light QL5, respectively. In addition, the same code | symbol is attached | subjected to the component which is common in FIG.

FIG. 3A shows a light control means 500a having a function of mainly absorbing light.
The light control means 500a is comprised, for example with the above-mentioned black fabric tape.
For example, the light QL1 is light passing through the optical path R2, and the incident region C of the second light incident surface FI2 of the diffuser plate 400 << see FIG. 2 (a). In other words, the light is totally reflected on the inner side surface of the ridge 410, and is incident on the light control means 500a through the tapered portion 440 of the diffusion plate 400. When the light QL1 is incident on the dimming unit 500a, the light is absorbed by the dimming unit 500a, and the light QL2 that is weaker than the light QL1 is emitted from the dimming unit 500a.
That is, the light QL1 incident on the dimming means 500a is dimmed from the dimming means 500a and emitted. For example, by changing the thickness of the fabric tape or changing the density of the fibers to be knitted, the amount of light that can be reduced and absorbed (light shielding rate) can be adjusted.

(C) Aspect of Reflecting Light FIG. 3B is a diagram for explaining a dimming means 500b mainly having a function of reflecting light. FIG. 3C is a cross-sectional view of the light control means 500b. FIG. 3D is a cross-sectional view of the light control means 500b ′.

FIG. 3B shows a dimming means 500b having a function of mainly reflecting light.
For example, the light QL1 is light passing through the optical path R2, and the incident region C of the second light incident surface FI2 of the diffuser plate 400 << see FIG. 2 (a). In other words, the light is totally reflected on the inner side surface of the ridge 410, and enters the light control means 500b through the tapered portion 440 of the diffusion plate 400. When the light QL1 is incident on the light control means 500b, most of the light QL1 is reflected and returned to the inside of the diffusion plate 400 as light QL3. On the other hand, a part of the light is emitted to the outside as the light QL4 from the light control means 500b.
That is, most of the incident light QL1 is reflected by the dimming means 500b, and the other part of the light is dimmed and transmitted through the dimming means 500b. Note that the other part of the light may be absorbed by the light control means 500b.

  As shown in FIG. 3C, the dimming unit 500b can be appropriately configured by applying a member capable of reflecting light originating from the light source 300 as the dimming layer 510a. When such a light control means 500b is provided in the taper part 440, the light which entered from the diffuser plate 400 side can be reflected, and the light which entered from the reverse side (outside) can also be reflected.

In addition, as shown in FIG. 3D, the light control means 500b ′ may be configured to have a structure having at least two layers. That is, the light control means 500b ′ is configured such that the adhesive layer 670, the second light control layer 511, and the light control layer 510b are stacked in this order from the tapered portion 440 side. The second light control layer 511 is formed of a member that can reflect light, and the light control layer 510b is formed of a member that is easy to absorb light, such as a black fabric tape, and that has high light shielding properties. In other words, the reflectance of the light control means 500b ′ on the inner side of the diffuser plate 400 (second light control layer 511) is higher than the reflectance of the light control means 500b ′ on the outer side (light control layer 510b). Configure.
According to such a configuration, the dimming unit 500b ′ absorbs the light incident from the outside of the dimming unit 500b ′ and absorbs the light QL1 to be emitted from the inside of the diffusion plate 400 through the tapered portion 440. Then, it can be reflected again to the inside of the diffusion plate 400 and returned as the light QL3.

Note that the light control means can also adjust the color tone at the peripheral edge 425 of the diffuser plate 400 from the viewpoint of “light control”. An example of this will be described next.
When the diffuser plate 400 is made of a material that easily absorbs light having a blue wavelength, the light transmitted through the diffuser plate 400 is easily yellowish.
By the way, the light emitted from the peripheral portion 425 of the diffusing plate 400 includes light that is totally reflected by the inner side surface of the convex portion 410 and emitted from the peripheral portion 425.
The peripheral portion 425 is thicker in the front-rear direction than the central portion 430 (see FIG. 2) of the diffusion plate 400, and the light emitted from the peripheral portion 425 is totally reflected on the inner side surface of the ridge 410. Also included.
That is, the optical path length in the diffusion plate 400 of the light emitted from the peripheral edge portion 425 of the diffusion plate 400 is emitted from the first light emission surface FE1 of the light guide plate 200 and is incident on the first light incident surface FI1 of the diffusion plate 400. The light path length of the light emitted from the central portion 430 of the second light emission surface FE2 is longer than the optical path length in the diffusion plate 400.
Therefore, the light emitted from the peripheral portion 425 of the diffusion plate 400 is more easily yellowish than the light emitted from the central portion 430 of the diffusion plate 400.
At this time, a difference in color occurs between the central portion 430 side and the peripheral edge portion 425 side of the light emitting surface, and this causes the illumination to be made uniform when viewed from the entire light emitting surface. It becomes.
When such a problem arises, for example, a dimming means mainly having a function of reflecting light, and a member whose blue light reflectance is higher than the reflectance of light of other colors (when natural light is applied) It is preferable to apply a member that recognizes blue as a base tone). For example, the dimming unit 500b may be configured by applying a blue tape to the dimming layer 510a, or the dimming unit 500b ′ may be configured by applying a blue tape to the second dimming layer 511. May be. By providing such a dimming means 500b or 500b ′ in the tapered portion 440, when the light to be emitted from the inside of the diffusion plate 400 is reflected by the dimming means 500b or 500b ′, the blue light The reflectance can be increased. Thereby, it can prevent that the light radiate | emitted from the peripheral part 425 of the diffusion plate 400 looks yellowish compared with the light radiate | emitted from the center part 430 of the diffusion plate 400. FIG.
In this way, the difference in color between the central part 430 side and the peripheral part 425 side of the light emitting surface can be suppressed, and the illumination can be made uniform when viewed from the entire light emitting surface.

(D) Aspect of Light Scattering FIG. 3E is a diagram for explaining a light control means 500c mainly having a function of scattering light. FIG. 3F is a cross-sectional view of the light control means 500c.

FIG. 3 (e) shows a dimming means 500c having a function of mainly scattering light.
For example, as shown in the optical path R2, the light QL1 is incident on the second light incident surface FI2 of the diffusion plate 400 << see FIG. 2 (a). In other words, the light is totally reflected on the inner side surface of the ridge 410, and is incident on the light control means 500c through the tapered portion 440 of the diffusion plate 400. When the light QL1 is incident on the light control means 500c, the light is scattered in the light control means 500c. A part of the scattered light is emitted to the outside from the light control means 500c.
By scattering the light emitted from the light control means 500c, the light emitted from the gap between the diffusion plates 400L and 400R can be made less likely to become a bright spot.

  As shown in FIG. 3F, the light control means 500c is configured by applying a member (for example, a member including light scattering particles) that can scatter light caused by the light source 300 as the light control layer 510c. Can do.

(E) Selection / Adjustment of Optical Characteristics The dimming unit 500 can perform at least one of light absorption, reflection, and scattering as described above. The relative degree of the strength of the optical characteristics can be appropriately selected and adjusted according to the situation for solving the problem of the first embodiment.
For example, when the illumination modules 10 are arranged in parallel, light emitted from the diffusion plate side portion 460 of one illumination module 10 among the illumination modules 10 adjacent to each other enters the diffusion plate side portion 460 of the other illumination module 10. However, the incident light may cause the peripheral portion 425 of the other illumination module 10 to have a higher luminance than the central portion 430. In this case, it is preferable to increase the light absorption rate of the light control means 500. By doing so, it is possible to suppress the amount of light that is emitted from the diffusion plate side portion 460 of one illumination module 10 and enters the diffusion plate side portion 460 of the other illumination module 10. That is, it can suppress that the brightness | luminance of the peripheral part 425 of the other illumination module 10 becomes higher than the brightness | luminance of the center part 430. FIG.
Conversely, it is also assumed that the luminance of the peripheral portion 425 of the illumination module 10 is lower than the luminance of the central portion 439. In this case, it is preferable to increase the light transmittance of the light control means 500. By increasing the light transmittance of the light control means 500, the light emitted from the diffusion plate side portions 460 facing each other of the illumination modules 10 adjacent to each other is incident on the other diffusion plate side portion 460. The brightness of the peripheral portion 425 of the illumination module 10 can be increased by the light. Further, the light reflectance of the light control means 500 may be increased. Increasing the light reflectance of the light control means 500 increases the amount of light that enters the light control means 500 from within the ridge 410 and is reflected toward the peripheral edge 425 by the light control means 500. Can do. By increasing the amount of light reflected toward the peripheral edge 425 from the light control means 500, the luminance of the peripheral edge 425 of the illumination module 10 can be increased.
The taper portion 440 is an inclined surface in which the surface on the ridge portion 410 side is directed upward when viewed from the inside of the ridge portion 410. Therefore, the light reflected by the light control means 500 is returned again to the inner side of the ridge portion 410 and easily enters the peripheral edge portion 425.
The degree of light absorption, reflection, and scattering can be adjusted as appropriate. For example, the light transmittance is made relatively large, and the restriction of light going back and forth between one dimming means 500 and the other dimming means 500 of the lighting modules 10 adjacent to each other is relaxed, so that they are arranged in parallel. It is also possible to make light actively enter the adjacent diffuser plate 400. Thus, the light shielding rate (transmittance) of the light control means 500 need not be 100% (0%).

(F) Attached Location / Attachment Range of Light Control Unit 500 The light control unit 500 is provided from the taper portion front edge 442 toward the taper portion rear edge 444. That is, when viewed in cross section as shown in FIG. 2A, the light control means 500 is provided over substantially the entire taper portion 440.

  In the first embodiment, for example, the length of the tapered portion 440 << the length when viewed in cross section as shown in FIG. >> is approximately 3.0 mm, while the thickness T1 including the light control means 500 and the adhesive layer 670 is approximately 0.2 mm.

When the illumination modules 10 are arranged in parallel, if the dimming means 500 of one illumination module 10 interferes with the tapered portion 440 of one illumination module 10 among the illumination modules 10 adjacent to each other, adjacent illumination A gap is likely to occur between the end portions 420 of the module 10.
Therefore, it is preferable that the tapered portion 440 of the lighting module 10 adjacent to each other and the dimming unit 500 do not interfere with each other.
When the thickness of the light control means 500 is sufficiently small with respect to the length (width in the front-rear direction) of the tapered portion 440 (when the amount of the front end of the light control means 500 projecting sideways from the end portion 420 is small). The tape to be the light control means 500 is provided from the substantially same position as the taper part front edge 442 in the taper part 440 or from the position slightly shifted rearward from the taper part front edge 442 to the rear side. It is preferable. In the case of this configuration, the dimming means 500 may interfere with each other, but the dimming means 500 can be deformed so that no gap is generated between the end portions 420.
When the thickness of the light control means 500 (tape) is not sufficiently small with respect to the length of the taper portion 440 (when the amount of the front end of the light control means 500 projecting sideways from the end portion 420 is large). In this case, the light control means 500 is provided from a position shifted slightly to the rear side (lower side in FIG. 2A) from the front edge 442 of the tapered portion. In this way, even if the dimming means 500 is provided, the dimming means 500 does not interfere with the tapered portion 440 of the diffuser plate 400, so that the ends of the adjacent diffuser plates when the illumination modules 10 are arranged in parallel are arranged. Can be adhered.
In the first embodiment, when the lighting modules 10 are arranged in parallel, the light control means 500 is provided over the entire length of the side that is scheduled to be adjacent to at least the adjacent lighting module 10.

3. Configuration of Lighting Device 50 Arranged in Parallel with Lighting Module 10 According to Embodiment 1 Next, lighting device 50 (lighting device 50 according to Embodiment 1) in which a plurality of lighting modules 10 according to Embodiment 1 are arranged in parallel will be described. To do.
FIG. 4 is a diagram for explaining the illumination module 10 and the illumination device 50 according to the first embodiment. Fig.4 (a) is sectional drawing showing the cross section of the location shown by IV-IV of FIG.4 (b). FIG. 4B is a plan view illustrating a state in which four illumination modules 10 according to Embodiment 1 are arranged in parallel. In addition, the same code | symbol is attached | subjected to the component which is common in FIG.

As illustrated in FIG. 4, the lighting device 50 according to the first embodiment includes a plurality of the lighting modules 10 according to the first embodiment described above. Each lighting module 10 is disposed such that at least a part of the diffusion plate side portion 460 of the lighting modules 10 adjacent to each other is in contact with each other. The at least one taper portion 440 of the diffuser plate side portion 460 that is in contact is provided with a dimming means 500 that can perform at least one of light absorption, reflection, and scattering.
In other words, the lighting modules 10 of the lighting device 50 are arranged so that the end portions 420 on the sides (hereinafter referred to as adjacent sides) located on the sides of the lighting modules 10 adjacent to each other are brought into contact with each other. Yes. For example, as illustrated in FIG. 4B, the lighting device 50 includes four lighting modules 10, and the four lighting modules 10 are arranged in parallel in the left-right and up-down directions.

In the first embodiment, as shown in FIG. 4, the dimming means 500 is provided in the tapered portion 440 only at the diffusion plate side portion 460 on the adjacent side of one of the two adjacent illumination modules 10. Is provided.
For example, when attention is paid to the illumination module 10 located in the upper right and the illumination module 10 located in the upper left in FIG. 4B, the relationship between the two left and right illumination modules 10 is the upper right of the two adjacent illumination modules 10. The dimming means 500 is provided only on the adjacent side of the lighting module 10, while the dimming means 500 is not provided on the adjacent side of the upper left lighting module 10 (see also FIG. 4A). . >>
When attention is paid to the illumination module 10 located at the upper right and the illumination module 10 located at the lower right, the relationship between the two left and right illumination modules 10 is the lower right illumination module 10 of the two adjacent illumination modules 10. The dimming means 500 is provided only on the adjacent side of the lighting module 10, while the dimming means 500 is not provided on the adjacent side of the upper right illumination module 10.

4). FIG. 5 illustrates an example of a light traveling route (light path) in the light guide plate 200 and the diffusion plate 400 according to the first embodiment, and an operation by the light control unit 500. -It is a figure shown in order to demonstrate an effect. In addition, the same code | symbol is attached | subjected to the component which is common in FIG.

As described above, the illumination module 10 according to the first embodiment includes the exterior case 100, the light guide plate 200, the light source 300, the diffusion plate 400, and the dimming unit 500.
The illumination module 10 includes a bottom portion 110 and an exterior case 100 having a side portion 120 provided so as to surround the bottom portion 110, and a light guide plate 200 housed in the exterior case 100 and having an end surface 210 and a first light emission surface FE1. And the light source 300 arranged so as to face the end surface 210 and emitting light toward the end surface 210, and the light emitted from the first light emitting surface FE1 is arranged on the first light emitting surface FE1 side of the light guide plate 200. A diffusing plate 400 having an incident first light incident surface FI1 and a second light emitting surface FE2 from which light incident from the first light incident surface FI1 is emitted.
Then, the diffusion plate 400 protrudes toward the light guide plate 200 and is located at a position facing at least the peripheral portion 220 on the end surface 210 side facing the light source 300 among the peripheral portions 220 of the first light emitting surface FE1 of the light guide plate 200. A convex strip 410 having a second light incident surface FI2 on which light emitted from the peripheral portion 220 of the first light emitting surface FE1 enters is provided.
In addition, an end portion 420 that is the outermost outer peripheral portion of the diffusion plate 400 projects outward from the side outer surface 122 of the outer case 100.
In addition, a direction perpendicular to the second light emission surface FE2 of the diffusion plate 400 and from the bottom 110 side of the outer case 100 toward the second light emission surface FE2 is defined as a first direction, which is opposite to the first direction. When the direction is the second direction, the diffuser plate 400 moves in the second direction << as the light module 10 moves from the front side (second light emission surface FE2 side) to the rear side (exterior case 100 side), The diffusion plate side portion 460 has a tapered portion 440 that is inclined toward the central portion 430 side of the diffusion plate 400.
Furthermore, the taper portion 440 is provided with a dimming means 500 capable of performing at least one of light absorption, reflection, and scattering (see FIG. 2A). >>

As described above, in the illumination module 10 according to the first embodiment, since the dimming unit 500 is provided in the tapered portion 440 on the side portion of the diffusion plate 400, the light is dimmed from the inside of the protruding portion 410 through the tapered portion 440. When entering the means 500, the light adjusting means 500 performs at least one of absorption, reflection, and scattering. The amount of light emitted from the light control unit 500 to the outside can be adjusted by light absorption performed in the light control unit 500. Further, the amount of light from the reverse direction, that is, the amount of light incident from the outside of the tapered portion 440 of the illumination module 10 can be adjusted in the same manner.
Therefore, even when a plurality of lighting modules 10 are arranged in parallel, the amount of light that passes between the diffusion plates 400 of adjacent lighting modules 10 can be adjusted.
In this way, the light control means 500 provided in the tapered portion 440 can alleviate the influence of the light incident from the adjacent illumination module 10, so that the luminance of the adjacent portion (the peripheral portion 425 of the diffusion plate 400, etc.) It is possible to suppress luminance unevenness such as luminance unevenness due to the fact that it becomes higher than the luminance of the central portion 430, and thus further uniform the luminance of the entire light emitting surface including the peripheral portion 425 of the diffusion plate 400. An illumination module that can be provided can be provided.
On the contrary, in the case where luminance unevenness such as luminance unevenness occurs due to the luminance of the adjacent portion (peripheral portion 425 or the like of the diffusion plate 400) being lower than the luminance of the central portion 430, the light transmittance is reduced. By introducing the large dimming means 500, the light emitted from the diffusion plate side portions 460 facing each other of the illumination modules 10 adjacent to each other is made incident on the other diffusion plate side portion 460, and the incident light is used for illumination. The brightness of the peripheral portion 425 of the module 10 can be increased. In addition, by introducing the dimming means 500 having a high reflectance with respect to light incident from the inside of the ridge 410, the amount of light reflected from the dimming means 500 toward the peripheral edge 425 is increased. The brightness | luminance of the peripheral part 425 of the illumination module 10 can be made high.
In this way, it is possible to provide an illumination module that can suppress the luminance unevenness and thus can further equalize the luminance of the entire light emitting surface including the peripheral edge 425 of the diffusion plate 400.

Referring to FIG. 5 with an example, when the dimming means 500 is not provided, each of the light emitted from the light source 300 of the illumination module 10R shown on the right and emitted to the outside following the optical path R1 and the optical path R2. The light is incident on the illumination module 10L shown on the left. In the illumination module 10L, the incident light that has traveled along the optical path R1 and the optical path R2 increases the brightness of the peripheral edge 425 (particularly in the vicinity of the ridge 410) of the second light exit surface FE2, and the shadow of the screw hole 450 and the screw 130 is increased. Luminance spots related to are easily developed.
Here, the dimming means 500 that mainly absorbs light and has a high light shielding property is provided in the tapered portion 440 of the illumination module 10R shown on the right. Then, as shown in FIG. 5, in the illumination module 10 </ b> R, a part of the light emitted from the light source 300 (for example, the light that has followed the optical path R <b> 2) is dimmed (shielded) by the dimming unit 500. The amount of light emitted to the outside of the illumination module 10R decreases. Therefore, the amount of light that has traveled along the optical path R2 incident on the illumination module 10L is reduced, and the luminance in the vicinity of the ridge 410 is not increased accordingly. As a result, the appearance of luminance spots related to the shadows of the screw holes 450 and the screws 130 is also suppressed, and the luminance of the entire light emitting surface including the peripheral edge portion 425 of the diffusion plate 400 is uniformed.

The lighting device 50 according to the first embodiment includes a plurality of the lighting modules 10 according to the first embodiment described above, and each lighting module 10 abuts at least a part of the diffusion plate side portion 460 between the lighting modules 10 adjacent to each other. The at least one tapered portion 440 of the diffuser plate side portion 460 that is arranged and abutted is provided with a light control means 500 that can perform at least one of light absorption, reflection, and scattering. .
In other words, one illumination module 10 has four sides when viewed from the front, and among the four sides of the illumination module 10, there is an illumination module 10 different from the one illumination module 10. The plurality of illumination modules 10 are arranged in parallel so that the end portions 420 of the diffusion plate 400 in adjacent sides are in contact with each other.

With such a configuration, the lighting device 50 according to the first embodiment has the following effects.
(A) By arranging the illumination modules 10 according to Embodiment 1 in parallel, the illumination device 50 having a light emitting surface with a wider area can be obtained. (A) A plurality of lighting modules 10 configured such that the end portion 420 of the diffusion plate 400 protrudes outside the side outer surface 122 of the exterior case 100 are used, and the end portion of the diffusion plate 400 in the adjacent side Since the plurality of lighting modules 10 are arranged in parallel so that 420 abuts each other, no gap is generated between the diffusion plates 400 of the adjacent lighting modules 10. Further, the end 420 of the diffusing plate 400 protrudes outward from the side outer surface 122 of the outer case 100 so that the inner side of the outer case 100 is not seen. If the end portion 420 of the diffusion plate 400 is located on the inner side of the side outer surface 122, the inside of the exterior case 100 may be visible from the inner side of the side outer surface 122. (C) Since the dimming means 500 is provided in the taper portion 440, the entire light emitting surface including the peripheral portion 425 of the adjacent diffuser plate 400, as described above, even if arranged in parallel. Can be obtained.
In addition, since no gap is generated between the adjacent diffusion plates 400, it is possible to prevent light from leaking from between the end portions 420 that are in contact with each other to generate bright lines.
Even when a gap is opened between the end portions 420 that are in contact with each other, the light control unit 500 can suppress the amount of light emitted from the tapered portion 440 so that the bright line can be made inconspicuous.

In the lighting device 50 according to the first embodiment, the dimming unit 500 is provided on the tapered portion 440 only on the side of the diffusion plate where one of the lighting modules 10 adjacent to each other is in contact with the lighting module 10. .
For example, in the case of two adjacent illumination modules 10R and 10L, the dimming means 500 is provided in the tapered portion 440 only on the adjacent side of the illumination module 10R (see FIG. 5).

  Since the dimming means 500 is provided only on the adjacent side of one of the illumination modules, an illumination device with a lower manufacturing cost can be obtained.

[Embodiment 2]
FIG. 6 is a view for explaining the illumination device 50a according to the second embodiment. Fig.6 (a) is sectional drawing showing the cross section of the location shown by VI-VI of FIG.6 (b). FIG. 6B is a plan view showing a state in which four illumination modules 10 according to Embodiment 1 are arranged in parallel. Constituent elements common to those in FIG.

The lighting device 50a according to the second embodiment basically has the same configuration as that of the lighting device 50 according to the first embodiment, but differs from the lighting device 50 according to the first embodiment in the arrangement of the light control means 500. That is, as illustrated in FIGS. 6A and 6B, the lighting device 50 a according to the second embodiment includes the diffusion plate side portions 460 (in FIG. 6) of the two adjacent lighting modules 10 in contact with each other. For example, as shown in FIG. 6A, the dimming means 500 is provided with a tapered portion of the illumination module 10R shown on the right. It is provided not only at 440 but also at the tapered portion 440 of the illumination module 10L shown on the left.

In this way, since the dimming means 500 is provided at each diffusion plate side part 460 that abuts the two adjacent lighting modules 10 (on each adjacent side), the dimming means 500 is provided in any one of the lighting modules. The amount of light emitted or incident from the diffusing plate side portion 460 can be adjusted more reliably as compared with the case where only the ten diffusing plate side portions 460 (on the adjacent sides) are provided.
For example, when it is recognized that the luminance of the peripheral edge portion 425 of the diffusion plate 400 is too higher than the luminance of the central portion 430, the dimming means 500 is provided on each adjacent side of the two adjacent illumination modules 10. Thus, the luminance of the peripheral edge portion 425 of the diffusion plate 400 can be strongly suppressed, and the luminance of the entire light emitting surface of the lighting device 50a can be equalized.
The lighting device 50 according to the first embodiment and the lighting device 50a according to the second embodiment can be appropriately selected and adopted according to the amount of light to be adjusted (for example, the amount to be dimmed). For example, when the luminance of the adjacent peripheral edge 425 when the plurality of lighting modules 10 are arranged in parallel is extremely higher than the luminance of the central portion 430, the configuration of the lighting device 50a according to the second embodiment can be employed. .

  In addition, the illuminating device 50a which concerns on Embodiment 2 has the structure similar to the illuminating device 50 which concerns on Embodiment 1 in points other than arrangement | positioning of the light control means 500. FIG. Therefore, it has the corresponding effect similarly among the effects which the illuminating device 50 which concerns on Embodiment 1 has.

[Embodiment 3]
FIG. 7 is a plan view for explaining the lighting device 50b according to the third embodiment.

The lighting device 50b according to the third embodiment basically has the same configuration as that of the lighting device 50 according to the first embodiment, but differs from the lighting device 50 according to the first embodiment in the arrangement of the light control means. That is, as shown in FIG. 7, the lighting device 50 b according to the third embodiment is provided with the dimming means 500 b intermittently (partially) on adjacent sides.
For example, referring to FIG. 7, on the adjacent side of the illumination module 10bR shown on the right, a plurality of dimming means 500b having a length shorter than that of the dimming means 500 in the first embodiment are provided intermittently. Yes.

  Thus, since the light control means 500b is provided intermittently (partially) on the adjacent side, the amount of light can be finely adjusted. For example, when it is recognized that the luminance of the peripheral edge portion 425 of the diffusion plate 400 is slightly higher than the luminance on the central portion 430 side, intermittently (partial) on the adjacent side as in the lighting device 50b according to the third embodiment. By providing the light control means 500b, the brightness of the peripheral edge 425 of the diffusion plate 400 can be slightly lowered.

Moreover, in the illuminating device 50b which concerns on Embodiment 3, it is preferable that the light control means 500b is arrange | positioned corresponding to the position where the screw hole 450 was placed. For example, in FIG. 7, in the illumination module 10R provided with the light control means 500b, the light control means 500b is provided so as to correspond to the position where the screw hole 450 of the illumination module 10R is placed.
By doing so, it is possible to suppress the appearance of luminance spots at the portion of the screw hole 450 where the luminance spots are likely to appear.

In addition, the illuminating device 50b which concerns on Embodiment 3 has the structure similar to the illuminating device 50 which concerns on Embodiment 1 in points other than arrangement | positioning of a light control means. Therefore, it has the corresponding effect similarly among the effects which the illuminating device 50 which concerns on Embodiment 1 has.
In the third embodiment, the dimming unit 500b is provided only on the adjacent side of one of the two adjacent illumination modules 10b, but the present invention is not limited to this. Like Embodiment 2, it is good also as a structure which each provides the light control means 500b in each adjacent edge of the two adjacent illumination modules 10b.

[Embodiment 4]
The illumination module and the illumination device (not shown) according to the fourth embodiment basically have the same configuration as the illumination modules 10 and 10b and the illumination devices 50, 50a, and 50b according to the first to third embodiments. In the optimization of how to provide the light control means, the illumination devices 50, 50a and 50b according to the first to third embodiments are different. That is, the illumination modules 10 and 10b and the illumination devices 50, 50a, and 50b according to the first to third embodiments change the way of providing the light control units 500 and 500b according to the luminance of the light source 300, and transmit light per side. The amount is optimized. On the other hand, the illumination module and the illumination device according to the fourth embodiment are dimming means according to the state of the print pattern 600 (lightness of the color of the print pattern, hue, etc.), that is, according to the density of the print pattern 600. The method of providing 500 is changed to optimize the light transmission amount per side.

The inventors of the present invention, as a result of repeated analysis of luminance spots when a plurality of lighting modules are arranged adjacent to each other, result in repeated analysis between the luminance of the adjacent peripheral portion 425 and the luminance of the central portion 430 described above. In addition to the fact that the difference tends to occur and that the shadow of the screw hole 450 and the screw 130 tends to appear as luminance spots, it has been found that there is the following tendency. (1) When the luminance of the light source is set slightly higher than normal, or when set slightly lower than normal, luminance unevenness is likely to occur. (2) Luminance spots may occur due to individual differences in manufacturing parts (light source, diffuser plate, etc.) that make up the illumination module, or shading on the printed pattern. By arranging, the luminance spots may be amplified and become conspicuous.
Considering these, it is preferable to configure the illumination module and the illumination device according to Embodiment 4 as follows. Depending on the luminance of the light source 300, the method of providing the light control means 500 is changed to optimize the light transmission amount per side. Further, according to the state of the print pattern 600 (the brightness of the color of the print pattern, the hue, etc.), so to speak, according to the density of the print pattern 600, the method of providing the light control means 500 is changed to transmit light per side. Optimize quantity. If the density of the printed pattern 600 on each side is not constant, the way of providing the light control means can be set according to the density of the printed pattern 600 on each side.

For example, when the luminance of the light source 300 is set high, the dimming means 500a mainly having a function of absorbing light is adopted, so to speak, it is dimmed and the influence of incident light from the adjacent illumination module is reduced. (Cut off. The degree of dimming can be determined by changing the material of the dimming means, changing the length of the dimming means (providing over the entire side / providing partly / discontinuously), changing the width of the dimming means, Changing the shape of the light means (mesh shape / slit shape / ordinary tape shape, etc.), changing the installation location of the light control means (the vicinity of the screw hole 450, the screw 130, etc. or the vicinity of the light source 300), a combination thereof, Can be optimized.
In addition, even when the amount of light transmitted through the print pattern 600 is large (when the lightness is high or the hue is relatively bright, etc.), in the same manner as described above, the arrangement of the light control means 500 is changed to change the per side. Can optimize the light.

  On the contrary, when the luminance of the light source 300 is set low, the dimming means 500b mainly having a function of reflecting light and the dimming means 500c having a function of mainly scattering light are used to make light Optimize transmission. The degree of dimming can be optimized by changing the same parameters as described above.

As described above, the illumination module and the illumination device according to the fourth embodiment are different from the illumination module and the illumination device according to the first to third embodiments in optimizing the way of providing the light control unit, but the brightness and print pattern of the light source 300 are different. In order to optimize the light transmission amount per side by changing the way of providing the light control means 500 according to the state of 600, the entire light emitting surface more appropriately according to the use conditions of the illumination module and the illumination device Can be achieved.
The illumination module and the illumination device according to the fourth embodiment have the same configuration as the illumination module and the illumination device according to the first to third embodiments, except for optimization of how to provide the light control means. Therefore, it has the applicable effect similarly among the effects which the illumination module and the illuminating device which concern on Embodiments 1-3 have.

  As mentioned above, although this invention was demonstrated based on said embodiment, this invention is not limited to said embodiment. It is possible to implement within the range which does not deviate from the meaning. For example, the number, material, shape, position, size, and the like of the components described in the above embodiment are exemplifications, and can be changed within a range not impairing the effects of the present invention. Further, for example, the following modifications are possible.

(1) In each embodiment, although the light control means 500 demonstrated by the thing by a tape, it is not restricted to this. For example, in the illumination module and the illumination device according to the first to fourth embodiments, the dimming unit is a coating material capable of performing at least one of light absorption, reflection, and scattering, and the coating material is applied to the tapered portion. It may be made.

FIG. 8 is an enlarged view of the tapered portion 440 shown to explain the light control means 500d in the first modification. As shown in FIG. 8, the light control means 500d may be configured by coating the surface of the tapered portion 440 with a coating material capable of at least one of light absorption, reflection, and scattering.
According to such a configuration, since the coating material is applied to the taper portion, it is possible to form a light control means with better fixability to the taper portion, and to provide the illumination module 10d with higher durability. Can be obtained.

(2) In each embodiment, the dimming means 500 has been described using a tape as an example, but is not limited thereto. For example, in the illumination module and the illumination device according to Embodiments 1 to 4, the dimming unit may be configured by a portion where the surface of the tapered portion is roughened.

FIG. 9 is an enlarged view of the tapered portion 440 shown to explain the light control means 500e in the second modification. As shown in FIG. 9, the surface of the tapered portion 440 may be roughened by providing fine irregularities, and the roughened portion may be configured as the light control means 500e.
Since the dimming means is constituted by the portion where the tapered portion 440 itself is processed and the surface of the tapered portion 440 is roughened, the illumination module is more durable. In addition, since an additional member is not required, it is possible to obtain an illumination module with reduced member cost.
Not only the taper portion 440 itself is roughened, but also the surface of the tape or coating provided on the taper portion 440 may be roughened to constitute the light control means.

(3) In each embodiment, the shape of the side portion of the diffusion plate 400 is a shape in which the curved surface 427 and the vertical surface 420A and the tapered portion 440 are formed from the front surface side to the rear surface side. It is not something that can be done. For example, as shown in FIG. 10, there is no portion corresponding to the curved surface 427 and the vertical surface 420A, and the end portion 420 is located immediately behind the edge of the second light emitting surface FE2, and from the immediately rear side thereof. The shape in which the taper part 440 is formed may be sufficient.

FIG. 10 is a diagram for explaining an illumination module 10u and an illumination device 50u according to the third modification. As shown in FIG. 10, the side portion of the diffusing plate 400 has a tapered portion 440 formed immediately after the end edge of the second light emitting surface FE2. In other words, the upper end portion of the tapered portion 440 and the end edge of the second light emitting surface FE2 coincide with each other.
In this case, it is preferable that the light control means 500 is provided toward the rear side from a position shifted rearward from the upper end of the tapered portion 440. By providing the light control means 500 at such a position, when the lighting modules 10u are arranged in parallel, the end portions 420 of the adjacent diffusion plates 400 are brought into close contact with each other without interference between the adjacent light control means 500. Can contact.

(4) In each embodiment, the shape of the side portion of the diffusion plate 400 is a shape in which the curved surface 427, the vertical surface 420A, and then the tapered portion 440 are formed from the front side to the rear side. It is not a thing. For example, there is no portion corresponding to the curved surface 427, and the vertical surface 420A may be located from the rear side of the light exit surface.

FIG. 11 is a view for explaining an illumination module 10v and an illumination device 50v according to the fourth modification. As shown in FIG. 11, the shape of the side portion of the diffusing plate 400 is such that a vertical surface 420 </ b> A is formed from immediately behind the edge of the second light emitting surface FE <b> 2.
In this case, it is preferable that the dimming unit 500 is provided toward the rear side, starting from the position shifted from the rear end of the vertical surface 420A (the lower end of the vertical surface in the drawing) to the rear side. By providing the light control means 500 at such a position, when the lighting modules 10 are arranged in parallel, the end portions 420 of the adjacent diffusion plates 400 are brought into close contact with each other without the adjacent light control means 500 interfering with each other. Can abut.

(5) In each embodiment, although the shape of the illumination module 10 was demonstrated as the rectangle which has four sides, it is not restricted to this. If a lighting device having a light emitting surface with a larger area can be configured in parallel with the end portions of the diffusion plates of a plurality of lighting modules being in contact with each other, for example, a triangle having three sides An appropriate shape can be selected, such as a lighting module having five sides and a pentagonal lighting module having five sides, and these are also equivalent to the lighting module and the lighting device according to the present invention.

10, 10L, 10R, 10bR, 10d, 10u, 10v, 700, 900, 900 '... lighting module, 50, 50a, 50b, 50u, 50v, 950 ... lighting device,
100, 910 ... exterior case, 110, 911 ... bottom part of exterior case, 120, 912 ... side part of exterior case, 122, 914 ... side part outer surface of exterior case, 130, 132 ... screw, 200, 920 ... light guide plate, 210, 921 ... end face of light guide plate, 220, 922 ... peripheral edge of light guide plate, 250 ... reflection sheet, 300, 930 ... light source, 350 ... flexible substrate, 370 ... light source frame, 372 ... light source frame fixing part, 373 ... Side portions of the light source frame, 374 ... shielding portions by the light source frame, 400, 940 ... diffuser plates, 410, 941 ... ridges, 420, 942 ... end portions of the diffuser plate, 420A ... vertical surfaces, 425, 425 '... diffusion Peripheral edge of plate, 427 ... curved surface, 430 ... center of diffusion plate, 440 ... tapered portion, 442 ... outer edge of tapered portion, 444 ... inner edge of tapered portion, 450 ... screw holes, 460 ... diffusion plate side, 500, 500a, 500b, 500b ', 500c, 500d, 500e ... dimming means, 510, 510b, 510c ... dimming layer, 511 ... second dimming layer, 600 ... Print pattern, 650 ... main frame, 670 ... adhesive layer

Claims (8)

An outer case having a bottom portion and side portions provided so as to surround the bottom portion;
A light guide plate housed in the exterior case and having an end surface and a first light exit surface;
A light source arranged so as to face the end face, and emitting light toward the end face;
A first light incident surface that is disposed on the first light exit surface side of the light guide plate and receives light emitted from the first light exit surface, and a second light that exits from the first light entrance surface. A diffusion plate having a light exit surface,
The diffusion plate protrudes toward the light guide plate, and is positioned at a position facing at least a peripheral portion on the end surface side facing the light source among peripheral portions of the first light emitting surface of the light guide plate. An illumination module provided with a convex portion having a second light incident surface on which light emitted from the peripheral portion of the light emitting surface is incident,
The outermost outer peripheral portion of the diffusion plate protrudes outward from the outer side surface of the exterior case,
A direction perpendicular to the second light exit surface of the diffuser plate and from the bottom side of the exterior case toward the second light exit surface is defined as a first direction, which is opposite to the first direction. When the direction is the second direction,
The diffusion plate has a tapered portion inclined toward the central portion side of the diffusion plate in the second direction as it proceeds in the second direction,
Furthermore, the taper part is provided with the light control means which can perform at least any one of absorption, reflection, and scattering of light, The illumination module characterized by the above-mentioned. The lighting module according to claim 1,
The light control means is a tape having a light control layer capable of performing at least one of light absorption, reflection and scattering,
An illumination module, wherein the tape is bonded to the tapered portion. The lighting module according to claim 1,
The light control means is a coating material capable of performing at least one of light absorption, reflection and scattering,
An illumination module, wherein the coating material is coated on the tapered portion. The lighting module according to claim 1,
The illumination module according to claim 1, wherein the light control means is configured by a portion where the surface of the tapered portion is roughened. In the illumination module in any one of Claims 1-4,
The illumination module according to claim 1, wherein a reflectance of the light control means on the inner side of the diffusion plate is higher than a reflectance of the light control means on the outer side. A plurality of illumination modules according to any one of claims 1 to 5,
Each of the illumination modules is disposed so that at least a part of the diffusion plate side portions of the illumination modules adjacent to each other are in contact with each other, and at least one of the tapered portions of the diffusion plate side portions to be contacted, An illuminating device comprising: the light control means capable of performing at least one of light absorption, reflection, and scattering. The lighting device according to claim 6.
Of the two adjacent illumination modules, the lighting device is characterized in that the dimming means is provided in the tapered portion only at the diffusion plate side portion where one of the illumination modules abuts. The lighting device according to claim 6.
The lighting device, wherein the dimming means is provided in each of the tapered portions in each of the diffusion plate side portions of the two adjacent lighting modules that contact each other.

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