JP2007335400A - Lighting cover and lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture which can make a proper light distribution by controlling simply an approximately parallel light of a light source module simply at a low cost and can change the light distribution easily in accordance with a space design. <P>SOLUTION: The lighting fixture 10 for an indoor and outdoor use is provided with a light source module 20 to irradiate an approximately parallel light and a transparent lighting cover 30a arranged in an irradiating direction of the light source module 20. On a rear surface of the lighting cover 30a, there are arranged regularly convex stripes 32a of an approximate angle shape with a first curved part 33a formed outward at a skirt, and the lighting cover 30a controls an irradiating light distribution of the light source module 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lighting fixture for indoor lighting or outdoor lighting, and relates to a lighting cover and a lighting fixture that control light distribution of a light source module that emits substantially parallel light.

  Conventionally, a light source module that emits parallel light is known. For example, Patent Document 1 includes a white LED, a rod, a direction changing member, and a reflector, and a plurality of white LEDs are provided in an annular shape with a predetermined interval from each other, and a white LED corresponding to each of the plurality of white LEDs is provided. A rod is provided so as to extend from the vicinity toward the focal point of the reflector, and the direction changing member of the focal position serving as a pseudo light source changes the traveling direction of the light of the white LED incident through the rod and emits it to the reflector. A light source module that emits parallel light from a reflector is disclosed.

JP 2005-250394 A

  By the way, when constructing a lighting fixture for indoor lighting or outdoor lighting using a light source module that emits parallel light, the parallel light can be controlled at low cost and easily to obtain an appropriate light distribution and adapted to spatial design. Therefore, it is required that the light distribution can be easily changed.

  The present invention is proposed in view of the above-described problems, and it is possible to easily control the substantially parallel light of the light source module at low cost and easily to obtain an appropriate light distribution, and to easily distribute the light according to the spatial design. It aims at providing the lighting cover and lighting fixture which can be changed.

  The lighting cover of the present invention is a translucent lighting cover installed in the light irradiation direction of a light source module that irradiates substantially parallel light of a lighting fixture for indoor and outdoor lighting, and is regularly arranged on the back surface. The light distribution of the light emitted from the light source module is controlled by a substantially mountain-shaped protrusion or protrusion.

  In the lighting cover of the present invention, it is preferable to form an outwardly convex rounded portion on the substantially chevron of the lighting cover or the bottom of the convex portion. In addition, the configuration in which the substantially chevron-shaped convex portions are substantially conical convex portions or the substantially pyramid-shaped convex portions, or the substantially chevron-shaped convex strips are arranged in a stripe shape, or the substantially chevron-shaped convex portions are arranged in a lattice shape or It is preferable that the configuration is arranged in a staggered pattern or a concentric pattern. In addition, the inclination angle of the inclined portion (side surface) of the substantially chevron-shaped convex line and the substantially chevron-shaped convex part in one lighting cover is, for example, large in the inclination angle of the convex line or convex part in the substantially central region, A structure in which the slopes of the ridges and protrusions are made different for each predetermined area of the surface of the lighting cover, such as reducing the inclination angle of the ridges and protrusions near the left and right end parts and the outer peripheral area of the circular cover, and a rectangular cover Along the surface of the lighting cover, such as gradually or stepwise increasing the inclination angle of the ridges or protrusions from one end of the head toward the other end or from the center of the circular cover to the outer periphery It is possible to adopt a configuration or the like that changes the inclination angle of the ridges or protrusions as the region shifts.

  In the illumination cover of the present invention, the inclination angle of the side surface of the substantially chevron-shaped convex strip or the side surface of the substantially chevron-shaped convex portion is made gradually steep toward the top of the convex strip or the top of the convex portion. It is characterized by.

  The lighting cover of the present invention is configured such that the inclination angle of the side surface of the substantially chevron-shaped convex line or the side surface of the substantially chevron-shaped convex part is gradually steeply stepped toward the top part of the convex line or the top part of the convex part. The slope region having a steep inclination angle is formed to have a longer length in the horizontal direction when viewed from the front.

  In the illumination cover of the present invention, the illuminance of illumination light at each radiation angle that is incident on each slope region and is emitted from the illumination cover is substantially uniform with respect to the length in the front view horizontal direction of the plurality of slope regions. It is characterized by setting as follows.

  The illumination cover according to the present invention is characterized in that the protrusions or the protrusions are provided corresponding to a plurality of irradiation regions having different average light flux densities of irradiation light of the light source module.

  A lighting fixture for indoor lighting according to the present invention includes the lighting cover according to the present invention and a light source module that emits substantially parallel light. Furthermore, the lighting fixture of the present invention is characterized in that a plurality of the light source modules are arranged adjacent to each other, and a single lighting cover is provided corresponding to the plurality of light source modules arranged side by side.

  In addition to the configuration of each invention and each embodiment, the invention of the present application is specified by changing these partial configurations to other configurations, or adding other configurations to these configurations. Or those obtained by deleting these partial configurations to the extent that partial effects can be obtained and specifying them as superordinate concepts.

  The lighting cover and the lighting fixture of the present invention are irradiated from the light source module by controlling the light distribution of the irradiation light with substantially mountain-shaped ridges or protrusions regularly arranged on the back surface of the translucent lighting cover. The substantially parallel light can be easily controlled at a low cost and an appropriate light distribution can be obtained, and the light distribution can be easily changed according to the spatial design. In addition, since the light distribution can be controlled by the lighting cover, the light source modules can be shared and standardized.

  In addition, by forming an outwardly convex rounded portion at the ridge of the substantially chevron or convex portion of the lighting cover, the transmitted light of the lighting cover is diffused by both the convex strip or the convex portion and the rounded portion. Uniform illumination light can be obtained.

  In addition, by gradually increasing the inclination angle of the side faces of the substantially mountain-shaped ridges and protrusions toward the top, it becomes possible to assign a large luminous flux to the illumination light having a large radiation angle, and to reduce the illuminance of the illumination surface. Uniformity can be improved.

  In addition, the side surfaces of the substantially chevron-shaped ridges and protrusions are composed of a plurality of slope areas where the inclination angle gradually becomes steep toward the top, and the slope area with a steep inclination angle is the length in the horizontal direction when viewed from the front. By forming the length long, it becomes possible to allocate a large luminous flux to the illumination light having a large radiation angle, and to improve the uniformity of the illumination intensity on the illumination surface. Furthermore, the light distribution of the illumination light can be controlled more accurately, and appropriate light distribution control is facilitated.

  In addition, by setting the horizontal length of the slope area in the front view so that the illuminance of the illumination light of each radiation angle incident on each slope area and radiated from the illumination cover is substantially uniform, Can be distributed so that the average illuminance is uniform, and the illuminance uniformity of the illumination surface can be further improved.

  Further, by providing the projections or the projections correspondingly to a plurality of irradiation areas having different average luminous flux densities of the irradiation light of the light source module, the luminous fluxes in the irradiation areas of the respective predetermined average luminous flux densities are provided. Each diffuses and the uniformity of illumination on the illumination surface can be further enhanced.

  In addition, by arranging a plurality of light source modules adjacent to each other and providing an illumination cover corresponding to the plurality of light source modules arranged side by side, the illumination light from the light emitted from each light source module is mixed and the illumination surface illumination is uniform. It is possible to further improve the properties.

  Embodiments of a lighting fixture and a lighting cover according to the present invention will be described with reference to the drawings.

  The lighting fixture 10 of 1st Embodiment is installed in the light irradiation area | region of the light irradiation direction of the light irradiation direction of the light source module 20 and the light source module 20 which irradiates substantially parallel light, as shown in FIGS. And a translucent illumination cover 30a to be irradiated.

  The light source module 20 is provided in a light source 21 provided linearly along the direction perpendicular to the paper surface of FIG. 1, and provided in a substantially light irradiation region of the light source 21, and is provided along the direction perpendicular to the paper surface of FIG. The reflector 22 is housed in the housing 23. The power supply is supplied to the light source 21 by the wiring not shown in the figure, and the control board is switched on and off by the ON / OFF switch. The light source 21 connected to is turned on and off. The light source 21 is installed at the focal position of the reflector 22 on the paraboloid, and the irradiation light irradiated from the light source 21 upward in the figure is reflected by the reflector 22 and the reflected light is irradiated as the substantially parallel light downward in the figure. It has come to be. The two-dot chain line shown is an optical path.

  The illumination cover 30a has a substantially square shape in plan view formed of a light-transmitting material such as acrylic resin, and is detachably fixed to a predetermined position below the light source module 20 with a fixture not shown in the drawing. . The illumination cover 30a is formed by forming substantially ridges 32a of a substantially mountain shape with a substantially isosceles triangle in front view on the back surface of the base body 31a whose front surface is substantially flush, and the ridges 32a are regularly formed in a stripe shape. ing. As shown in FIGS. 2 and 3, first skirt portions 33a that protrude outward are formed at both hems of the side surface (inclined portion) of the ridge 32a, and the ridges 32a and 32a are formed. Between the first rounded portions 33a and 33a, a second rounded portion 34a having an arcuate groove shape is formed.

  The basic radiation angle θ4 of the emitted light that the substantially parallel light from the light source module 20 passes through the illumination cover 30a and exits from the illumination cover 30a is Snell's law, that is, the refractive index of air n1 (≈1), illumination If the refractive index n2 of the material of the cover 30a is assumed, n1 · sin θ1 = n2 · sin θ2, n2 · sin θ3 = n1 · sin θ4, and θ3 = θ1-θ2 are established for θ1 to θ4 in FIG. It is mainly defined by the inclination angle θ1 from the horizontal direction of the slope of the ridge 32a equal to the incident angle θ1 of the incident light to the light and the refractive index n2 of the material of the illumination cover 30a. Accordingly, the ridge 32a is formed by setting the inclination angle θ1 of the slope of the ridge 32a according to the required radiation angle θ4 and the material of the illumination cover 30a.

  Moreover, the pitch P which forms the protruding item | line 32a of the illumination cover 30a, the width L between the outer ends of the 1st rounded part 33a * 33a of the both ends of the protruding item | line 32a, the upper end of 1st rounded part 33a * 33a of the protruding item | line 32a The width l between them, the radius of curvature of the first rounded portion 33a, and the like can be appropriately set as necessary from the viewpoints of light diffusion, improvement in uniformity of illuminance distribution, and optimization. As an example, when the illumination cover 30a is formed of an acrylic resin having a refractive index n2 of about 1.4 to 1.5, the slope angle θ1 of the slope of the ridge 32a is 30 ° to 60 °, and the pitch P is 2.0 to 6.5 mm, width L is 1.9 to 6.4 mm, width l is 1.3 to 4.4 mm, and the radius of curvature of the first round portion 33a is 1.8 to 7.0 mm.

  In the above configuration, the light source 21 can be an appropriate light source such as a light emitting diode (LED), a fluorescent lamp, an incandescent lamp, or a directional LED is used as the light source. In this case, the shape of the reflector 22 is adjusted accordingly so that the light source module 20 emits substantially parallel light. Further, the light source module 20 is appropriate as long as the illumination intensity necessary for indoor lighting or outdoor lighting is obtained and the light source module 20 has a structure that emits substantially parallel light. It is also possible to use a light source module that uses LEDs that provide the required illuminance, or a light source module that emits substantially parallel light from the back side of a Fresnel lens whose front surface is the Fresnel surface and whose back surface is flush. . In addition, one light source module 20 may be provided for one illumination cover 30a. However, if there are a plurality of light source modules 20 such as three for one illumination cover 30a of the present embodiment, the illuminance distribution can be made more uniform. It is preferable. Further, the front view shape of the protrusion 32a of the illumination cover 30a may be a triangle other than an isosceles triangle. Further, as in the fifth embodiment to be described later, the inclination angle of the inclined surface (side surface) of the plurality of protruding ridges 32a may be changed gradually or stepwise according to the required light distribution. The same applies to 32b, 32c, and 32d.

  The lighting fixture 10 of the first embodiment can obtain an appropriate light distribution by controlling substantially parallel light with the shape of the ridge 32a, in other words, the lighting cover 30a. Accordingly, it is possible to easily control the substantially parallel light emitted by the light source module 20 at a low cost and obtain an appropriate light distribution. Moreover, since the illumination cover 30a can be easily attached and detached and changed, the light distribution can be easily changed according to the space design. Further, since the light distribution can be controlled by the illumination cover 30a, the light source module 20 can be shared and standardized. Moreover, since the light transmitted through the illumination cover 30a can be diffused by the convex lens 32a and the convex lens-like first round part 33a and the concave lens-like second round part 34a, the illuminance distribution can be made more uniform.

  Next, the illumination covers 30b and 30c of 2nd and 3rd embodiment are demonstrated as a modification of the illumination cover 30a of 1st Embodiment. The light source module of the lighting fixture in which the illumination covers 30b and 30c of the second and third embodiments are used, and the arrangement and fixing structure of the illumination covers 30b and 30c with respect to the light source module are the same as those of the first embodiment. The only difference is that 30b and 30c are different.

  The illumination cover 30b according to the second embodiment has a substantially circular shape made of a translucent material such as acrylic resin, and has a substantially conical shape on the back surface of the base 31b whose front surface is substantially flush as shown in FIG. A substantially mountain-shaped convex portion 32b is formed, and the convex portion 32b is regularly formed in a lattice shape. At the skirt of the side surface (inclined portion) of the convex portion 32b, a first rounded portion 33b that is convex outward is formed in a circumferential shape. The inclination angle of the side surface of the convex portion 32b from the horizontal can be set in the same manner as the inclination angle θ1 of the slope of the convex strip 32a, and further, the pitch P that forms the convex portion 32b, and the first radius of the convex portion 32b. The diameter L of the outer end of the portion 33b, the diameter of the upper end of the first rounded portion 33b of the convex portion 32b (the diameter of the lower end of the side surface of the convex portion 32b) l, the radius of curvature of the first rounded portion 33b, etc. Similarly, it can be appropriately set as necessary. In addition, the convex part 32b is good also as a structure etc. which form regularly instead of a grid | lattice form in a zigzag form. As an example, when the illumination cover 30b is formed of an acrylic resin having a refractive index n2 of about 1.4 to 1.5, the inclination angle θ1 of the slope of the convex portion 32b is 30 ° to 60 °, and the pitch P is 2.0 to 6.5 mm, the diameter L is 1.9 to 6.4 mm, the diameter l is 1.3 to 4.4 mm, and the radius of curvature of the first round portion 33b is 1.8 to 7.0 mm.

  Moreover, the illumination cover 30c of 3rd Embodiment is formed with translucent materials, such as an acrylic resin, and as shown in FIG. 5, the back surface of the base | substrate 31c whose front is substantially flush is substantially pyramid-shaped and substantially mountain-shaped. Convex portions 32c are formed, and the convex portions 32c are regularly formed in a lattice shape. A first rounded portion 33c that protrudes outward is formed in a circumferential shape at the skirt of the side surface (inclined portion) of the convex portion 32c. The inclination angle of the side surface of the convex portion 32c from the horizontal can be set in the same manner as the inclination angle θ1 of the slope of the convex ridge 32a. Further, the pitch P forming the convex portion 32c and the first radius of the convex portion 32c are set. The width L between front outer ends of the portion 33c, the width l between the upper ends of the first round portions 33c of the convex portion 32c, the radius of curvature of the first round portion 33c, and the like are the same as in the first and second embodiments. It is possible to set appropriately as needed. As an example, when the illumination cover 30c is formed of an acrylic resin having a refractive index n2 of about 1.4 to 1.5, the inclination angle θ1 of the slope of the convex portion 32c is 30 ° to 60 °, and the pitch P is 2.0 to 6.5 mm, width L is 1.9 to 6.4 mm, width l is 1.3 to 4.4 mm, and the radius of curvature of the first rounded portion 33c is 1.8 to 7.0 mm.

  Next, the lighting fixture and lighting cover 30d of 4th Embodiment are demonstrated.

  As shown in FIGS. 6 and 7, the lighting apparatus of the fourth embodiment is installed in a light source module 20d that irradiates substantially parallel light and a light irradiation region in the light irradiation direction of the light source module 20d, and is irradiated with substantially parallel light. And a translucent illumination cover 30d.

  As shown in FIG. 6, the light source module 20d includes a point-like light source 21d and a reflector 22d that is provided in a substantially light irradiation region of the light source 21d and has a bowl-shaped paraboloid surface. Is. The light source 21d is installed at the focal position of the parabolic reflector 22d, and as shown by the two-dot chain line in the figure, the irradiation light irradiated from the light source 21d to the upper side in the figure is reflected and reflected by the reflector 22d. Light is irradiated downward in the figure as substantially parallel light. Other configurations are the same as those of the light source module 20 of the first embodiment.

  The illumination cover 30d has a substantially circular shape made of a translucent material such as acrylic resin, and is disposed in the light irradiation direction in a one-to-one relationship with the light source module 20d. As shown in FIG. 7, a substantially conical and substantially chevron-shaped convex portion 32d is formed on the back surface of the base 31d whose front surface is substantially flush, and the convex portions 32d are regularly formed concentrically. . At the skirt of the side surface (inclined portion) of the convex portion 32d, a first rounded portion 33d that is convex outward is formed in a circumferential shape. The inclination angle of the side surface of the convex portion 32d from the horizontal can be set in the same manner as the inclination angle θ1 of the slope of the convex ridge 32a, and the pitch of the concentric circles defining the arrangement position of the convex portion 32d, the convex portion The diameter L of the outer end of the first rounded portion 33d of 32d, the diameter l of the upper end of the first rounded portion 33d of the convex portion 32d, the radius of curvature of the first rounded portion 33d, and the like are the same as in the first embodiment. It is possible to set as appropriate from the viewpoint of improving the diffusion and uniformity of the illuminance distribution or from the viewpoint of optimization. As an example, the pitch of the concentric circles can be set to 2.0 to 6.5 mm, and other numerical ranges can be set to the same numerical ranges as in the second embodiment. The arrangement and fixing structure of the other illumination cover 30d with respect to the light source module 20d are the same as those in the first embodiment.

  In the lighting fixtures of the second to fourth embodiments, the shape of the convex portions 32b to 32d, or the like, in other words, the lighting covers 30b to 30d, the substantially parallel light is controlled at low cost and easily to obtain an appropriate light distribution. be able to. Further, since the illumination covers 30b to 30d are detachable and can be easily changed, the light distribution can be easily changed according to the space design. Further, since the light distribution can be controlled by the illumination covers 30b to 30d, the light source modules can be shared and standardized. Moreover, since the transmitted light of the illumination covers 30b to 30d can be diffused by the convex portions 32b to 32d and diffused by the convex lens-shaped first round portions 33b to 33d, the illuminance distribution can be made more uniform.

  Next, the lighting fixture and lighting cover 30e of 5th Embodiment are demonstrated.

  The lighting fixture 10e of the fifth embodiment is a fluorescent lamp type lighting fixture, and as shown in FIGS. 8 and 9, the light source module 20e that emits substantially parallel light and the light irradiation in the light irradiation direction of the light source module 20e. And a translucent illumination cover 30e that is installed in the region and is irradiated with the substantially parallel light.

  The light source module 20e includes a point light source 21e and a reflector 22e formed in a parabolic umbrella shape. The light source 21e is disposed downward and is provided on the top of the reflector 22e. The light source 21e includes a plurality of LEDs that irradiate light with a predetermined directivity, and the plurality of LEDs irradiate light directly downward and irradiate the reflector 22e, reflect the light by the reflector 22e, and irradiate downward. It arrange | positions so that the light to do may become substantially parallel. As in the first embodiment, power is supplied to the light source 21e by wiring not shown in the drawing, and the light source 21e connected to the control board is turned on by switching the control board ON / OFF by the ON / OFF switch.・ Turns off the lights. The two-dot chain line in the figure is the optical path of the irradiation light from the light source 21e.

  The light source module 20e is housed in an upper part of a casing 11e having an elongated rectangular parallelepiped shape with the light irradiation direction facing downward, and a plurality of light source modules 20e are adjacent to each other in the casing 11e. Arranged in a matrix or column. In this example, a light source module 20e having 8 rows and 2 columns in plan view is disposed in the housing 11e. Also, a rectangular illumination cover 30e in a plan view is provided at the lower end opening of the housing 11e, and the illumination cover 30e is detachably fixed to the peripheral side wall of the lower end opening with a fixture omitted in the drawing.

  The illumination cover 30e is formed of a light-transmitting material such as acrylic resin, and has a convex surface 32e having a substantially chevron shape when viewed from the front side on the other surface of the base body 31e whose one surface is substantially flush. The ridges 32e are regularly formed in stripes with a predetermined pitch, 321e is a ridge line corresponding to the top of the ridges 32e, and 322e is a valley line between the ridges 32e and 32e.

  As shown in FIGS. 10 and 11, the ridge 32e has an inclined surface whose inclination angle gradually becomes steeper from the valley line 322e toward the ridge line 321e, and the inclined surface has a substantially parabolic shape protruding downward. The incident angle θ1 and the emission angle θ4 of the substantially parallel light irradiated from the upper side of the ridge 32e on the illumination cover 30e can be increased as the portion is closer to the ridge line 321e, and can be decreased as the portion is closer to the valley line 322e. ing.

  Furthermore, the ridge 32e of the present embodiment has a slope whose slope gradually becomes steeper gradually from the valley line 322e toward the ridge line 321e, and the slope of the incident angle θ1 and the radiation angle θ4 is close to the ridge line 321e. The region can be made larger, and the slope region closer to the valley line 322e can be made smaller. The stepwise inclination angle (= incident angle θ1) of the slope region is such that, for example, the illumination cover 30e emits the illumination light at a radiation angle θ4 in increments of a predetermined angle from the next smallest radiation angle of 0 degrees to the maximum radiation angle. Corresponding settings are set.

Further, among the stepped slope regions, the slope region with a steep inclination angle has a longer frontal view and a larger area, and has a larger slope region with a large incident angle θ1 and a small incident angle θ1. The area of the slope area is small. The length or area in the horizontal direction of the front view of each slope region with different slope angles is set so that the illuminance E with respect to an illumination surface such as a floor surface by each radiation angle θ4 in increments of a predetermined angle is substantially uniform, I = E · h ² / cos ² θ4 (I: luminous flux (illuminance received by incident surface × area of horizontal projection surface of incident surface), h: distance from light source to illumination surface such as floor surface) . Specifically, assuming that the illuminance of the substantially parallel light received by the entire protrusion 32e is constant, and assuming that E · h ² = constant, the radiation angle from the next smallest radiation angle of 0 degrees to the maximum radiation angle. 1 / cos ² θ4 is calculated for the radiation angle θ4 in increments of a predetermined angle and summed, and the length (area) in the horizontal direction of the front view is distributed at a ratio of each 1 / cos ² θ4 to the total value. The length (area) in the horizontal direction of the front view is set, in other words, the light flux I is set.

In the example of FIG. 10, the substantially parallel light irradiated to the ridge 32e side of the illumination cover 30e is changed to a radiation angle θ4 in increments of 5 degrees from 5 degrees to 45 degrees by the illumination cover 30e, and as illumination light from the lower surface of the base 31e. Each of the nine slope regions A1 to A9 (= incident angle θ1) in which the slope angle gradually becomes steep from the valley line 322e toward the ridge line 321e is 5 degrees to 45 degrees. It is set corresponding to the radiation angle θ4 in increments of 5 degrees up to 5 degrees. That is, the inclination angle (= incident angle θ1) sets the radiation angle θ4 stepwise, and Snell's law (n1 · sin θ1 = n2 · sin θ2, n2 · sin θ3 = n1 · sin θ4, θ3 = θ1-θ2, The inclination angle (= incident angle θ1) is determined from the set radiation angle θ4 by n1: refractive index of air and n2: refractive index of the material of the illumination cover 30e. In the example of FIG. 10, 1 / cos ² θ4 is calculated and summed for each of the radiation angles θ4 in increments of 5 degrees from 5 degrees to 45 degrees, and summed, and the front surface is in a ratio of each 1 / cos ² θ4 to the total value. The length (area) in the viewing horizontal direction is allocated, and the length or area in the front viewing horizontal direction of each of the slope regions A1 to A9 is set so as to gradually become longer or larger as it approaches the ridgeline 321e.

  The substantially parallel light is incident on the ridge 32e in FIG. 11 from the upper side. For example, the slope region A9 having a large inclination angle and large area adjacent to the ridge line 321e receives more light flux and has a larger radiation angle θ4. And radiates many light beams as illumination light at an emission angle of 45 degrees. In addition, the slope region A3, which is relatively close to the valley line 322e and has a relatively small inclination angle and area, refracts so as to receive a small amount of light and the radiation angle θ4 is relatively small, and is relatively small at a radiation angle of 15 degrees. Are emitted as illumination light. And the illuminance on the illumination surface of the illumination light having a large radiation angle θ4 and a long distance to the illumination surface is substantially the same as the illuminance on the illumination surface of the illumination light having a small radiation angle θ4 and a short distance to the illumination surface, Since the illuminance on the illumination surface of the illumination light at the radiation angle θ is substantially the same, the illumination surface can be illuminated with substantially uniform illuminance.

  The illumination light emitted from the light source module 20e substantially in parallel is bright at the center and slightly decreases in brightness when approaching the periphery. For example, as shown in FIG. 12, the entire irradiation region LR of the irradiation light from the light source module 20e However, in the case where it is configured by a plurality of concentric irradiation regions LR1 to LR3 whose average light flux densities are different in stages, the irradiation regions LR1, LR2, and LR3 correspond to the irradiation regions LR1, LR2, and LR3, respectively, in the direction orthogonal to the longitudinal direction of the protrusion 32e. As described above, the protrusion 32e may be provided. In the example of FIG. 12, the light source module 20e forms three circular irradiation areas LR1, LR2, and LR3 divided by the boundaries B1 and B2 on the illumination cover 30e, and a plurality of identical illumination covers 30e are formed corresponding thereto. Convex ridges 32e having widths are continuously provided at an equal pitch, and the diameter of the central irradiation region LR1 and the widths of the outer peripheral donut-shaped irradiation regions LR2 and LR3 are substantially the same as the ridges 32e. It has become. Note that the light flux density ratio of the irradiation regions LR1, LR2, and LR3 is, for example, 10: 5: 1.5.

  The illumination light of the light source module 20e is diffused by the illumination cover 30e in the illumination areas LR1, LR2, and LR3 each having a predetermined average luminous flux density at a predetermined radiation angle, so that the illumination surface such as the floor surface is uniformly illuminated. The sex can be increased. Further, in the lighting fixture 10e, the light source modules 20e are arranged adjacent to each other, and the diffusion is performed by the lighting cover 30e, so that the illumination light from the light emitted from the light source modules 20e is mixed, and illumination of an illumination surface such as a floor surface is performed. The uniformity can be further enhanced.

  Note that the illumination cover 30e having the same shape and the same pitch of the ridges 32e in FIG. 12 is preferable because the manufacturing operation is easy, but when the diameters and widths of the irradiation regions LR1 to LR3 are different. The lighting cover 30e can be formed to form the ridges 32e with corresponding widths. It is also possible to provide the ridges 32e without corresponding to each irradiation region LR1 and the like. In addition, the inclination angle of the side surface of the ridge 32e may be configured to be gradually steep in a curved shape toward the ridge line 321e in addition to being gradually steep toward the ridge line 321e. Moreover, the maximum radiation angle and the predetermined angle of the predetermined angle increment of the luminaire are appropriate other than the above example. For example, the maximum radiation angle is 60 degrees or 30 degrees, and the predetermined angle increment is 1 degree, 3 degrees. Or it may be 10 degrees.

  The lighting fixture 10e of the fifth embodiment increases the uniformity of illumination by each of the shape of the ridge 32e, the corresponding arrangement of the ridges with respect to the irradiation regions LR to LR3, and the adjacent arrangement of the light source modules 20e, and is combined. The uniformity of illumination on the illumination surface can be dramatically improved with a typical configuration. Further, similarly to the first embodiment, the light distribution control can be easily performed at a low cost by the illumination cover 30e. Moreover, since the illumination cover 30e can be easily attached and detached and changed, the light distribution can be easily changed according to the space design. Further, since the light distribution can be controlled by the illumination cover 30e, the light source module 20e can be shared and standardized.

  Note that the configurations of the above-described embodiments and modifications can be applied to the configurations of other embodiments within the applicable range. For example, in the lighting fixture 10e of the fifth embodiment, the light source module 20e is the first one. Similarly to the embodiment, the light source 21e may be linearly provided along the direction perpendicular to the paper surface of FIG. 8 and the reflector 22e may be substantially parabolic when viewed from the front along the direction perpendicular to the paper surface of FIG. .

  Moreover, it is set as the structure which provides the cone-shaped or polygonal pyramid-shaped convex part in the center with respect to the circular light source module 20e of 5th Embodiment, and the illumination cover which formed the concentric mountain-shaped convex stripe in the circumference | surroundings. Is also possible. For example, a cone-shaped convex portion may be provided corresponding to the irradiation region LR1 in FIG. 12, and a mountain-shaped protrusion may be provided corresponding to each of the irradiation regions LR2 and LR3. The side surfaces of the central convex portion and the concentric convex ridges can be inclined surfaces having a gradually changing inclination angle similar to the inclined surfaces of the convex stripes 32e of the fifth embodiment. The side surface of the strip may be composed of a plurality of slope regions where the inclination angle gradually becomes steep in steps, and the length of the slope region with a steeper inclination angle may be increased in the horizontal direction in the front view. In the fifth embodiment, one illumination cover 30e is provided corresponding to 16 light source modules 20e of 8 rows and 2 columns, but the number of light source modules 20e provided corresponding to one illumination cover 30e. Can be a singular or an appropriate plural, and it is also possible to provide a plurality of illumination covers 30e corresponding to one light source module 20e.

  The present invention can be used as, for example, a lighting fixture for indoor lighting or a lighting cover thereof.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal front view illustrating a lighting apparatus and a lighting cover according to a first embodiment. The partial rear view of the illumination cover of 1st Embodiment. The partial expansion explanatory view of the lighting cover of a 1st embodiment. (A) is the partial rear view of the lighting cover of 2nd Embodiment, (b) is the partial longitudinal cross-section front view of the lighting cover of 2nd Embodiment. (A) is the partial rear view of the lighting cover of 3rd Embodiment, (b) is the partial longitudinal cross-section front view of the lighting cover of 3rd Embodiment. Longitudinal front explanatory drawing showing a lighting fixture and a lighting cover of a fourth embodiment. (A) The partial rear view of the lighting cover of 4th Embodiment, (b) is the partial longitudinal cross-section front view of the lighting cover of 4th Embodiment. The longitudinal front explanatory drawing which shows the lighting fixture and lighting cover of 5th Embodiment. Explanatory drawing of the bottom face of the lighting fixture of 5th Embodiment. The fragmentary longitudinal cross-section which shows the protruding item | line of the illumination cover of 5th Embodiment. Explanatory drawing explaining the refraction | bending of the illumination light in the protruding item | line of the illumination cover of 5th Embodiment. Explanatory drawing explaining the relationship between the illumination cover and illumination intensity distribution area | region in 5th Embodiment.

Explanation of symbols

10, 10e ... lighting fixtures 20, 20d, 20e ... light source modules 21, 21d, 21e ... light sources 22, 22d, 22e ... reflectors 23, 23d, 11e ... casings 30a, 30b, 30c, 30d, 30e ... lighting covers 31a, 31b, 31c, 31d, 31e ... base bodies 32a, 32e ... ridge 321e ... ridge line 322e ... valley lines 32b, 32c, 32d ... convex parts 33a, 33b, 33c, 33d ... first round part 34a ... second round part LR ... Whole irradiation area LR1, LR2, LR3... Irradiation area B1, B2... Boundary of irradiation area

In the illumination cover of the present invention, the inclination angle of the side surface of the substantially chevron-shaped convex strip or the side surface of the substantially chevron-shaped convex portion is made gradually steep toward the top of the convex strip or the top of the convex portion. It is characterized by. The lighting cover of the present invention is configured such that the inclination angle of the side surface of the substantially chevron-shaped convex line or the side surface of the substantially chevron-shaped convex part is gradually steeply stepped toward the top part of the convex line or the top part of the convex part. The slope region having a steep inclination angle is formed to have a longer length in the horizontal direction when viewed from the front. In the illumination cover of the present invention, the illuminance of illumination light at each radiation angle that is incident on each slope region and is emitted from the illumination cover is substantially uniform with respect to the length in the front view horizontal direction of the plurality of slope regions. It is characterized by setting as follows. The illumination cover according to the present invention is characterized in that the protrusions or the protrusions are provided corresponding to a plurality of irradiation regions having different average light flux densities of irradiation light of the light source module. Moreover, the lighting fixture for indoor lighting of this invention is provided with the illumination cover of this invention, and the light source module which irradiates substantially parallel light, It is characterized by the above-mentioned. Furthermore, the lighting fixture of the present invention is characterized in that a plurality of the light source modules are arranged adjacent to each other, and a single lighting cover is provided corresponding to the plurality of light source modules arranged side by side.

The lighting cover or the lighting fixture for indoor / outdoor lighting according to the present invention includes a light source of an LED having a predetermined directivity and a reflector that reflects the light emitted from the LED light source. A light source module for indoor / outdoor illumination, comprising: a light source module that irradiates as substantially parallel light; and a translucent illumination cover installed in a light irradiation direction of the light source module. It is a lighting fixture, and is provided with a substantially chevron-shaped protrusion or protrusion regularly on the back surface of the illumination cover, and is incident on the protrusion or protrusion with substantially parallel light and emitted at each radiation angle. The illuminance on the illumination surface by the radiated light is set to be substantially uniform, and the inclination angle of the side surface of the ridge or the side surface of the projection is gradually steeper toward the top of the ridge or the top of the projection. Before The ridge or the protrusion, and controlling the light distribution of the substantially parallel light of the irradiation light of the light source module. Further, in the lighting cover or the lighting fixture for indoor / outdoor lighting according to the present invention, the inclination angle of the side surface of the ridge or the side surface of the projection is gradually increased toward the top of the ridge or the top of the projection. A plurality of slope regions that are gradually steep are formed, and a slope region with a steep inclination angle is formed to have a longer length or a larger area in the horizontal direction when viewed from the front. Further, in the illumination cover or the lighting fixture for indoor / outdoor illumination according to the present invention, the inclination angle of the side surface of the ridge or the side surface of the projection is curved toward the top of the ridge or the top of the projection. It is characterized by being configured to become gradually steep.

The lighting fixture for indoor / outdoor lighting of the present invention includes a light source of an LED having a predetermined directivity and a reflector that reflects the light emitted from the LED light source, and the light emitted from the LED light source is substantially parallel light. A light source module that illuminates the light source, and a translucent illumination cover installed in the light irradiation direction of the light source module. The stripes or projections are regularly arranged, and set so that the illuminance on the illumination surface by the radiated light incident on the projections or the projections with substantially parallel light and radiated at each radiation angle becomes substantially uniform. Then, the inclination angle of the side surface of the convex line or the side surface of the convex part is gradually made steeper toward the top part of the convex line or the top part of the convex part. Parallel light illumination And controlling the distribution of light. Moreover, the lighting fixture for indoor / outdoor lighting of the present invention has a point-like light source of LED having a predetermined directivity, and a parabolic umbrella-shaped reflector that reflects the irradiation light of the LED light source, and the LED A plurality of light source modules that irradiate the light emitted from the light source as substantially parallel light are arranged in a matrix or in a row, and corresponding to the plurality of light source modules arranged in parallel, in the light irradiation direction of the plurality of light source modules. A translucent illumination cover is installed, and approximately chevron-shaped projections or projections are regularly arranged on the back of the illumination cover, and each radiation is incident on the projections or projections with substantially parallel light. The illuminance on the illumination surface by the radiated light radiated at the corner is set to be substantially uniform, and the inclination angle of the side surface of the ridge or the side surface of the ridge is set on the top of the ridge or the top of the projection. Gradually steeply Or by the protrusion, and controlling the light distribution of the illumination light of the substantially parallel light of the light source module. Moreover, the lighting fixture for indoor / outdoor lighting of the present invention has a point-like light source of LED having a predetermined directivity, and a parabolic umbrella-shaped reflector that reflects the irradiation light of the LED light source, and the LED A plurality of light source modules that irradiate with the light emitted from the light source as substantially parallel light are arranged in a matrix or in a row, and light-transmitting illumination is provided in the light irradiation direction of the light source module corresponding to each of the light source modules. A cover is installed, a substantially chevron-shaped convex part is provided at the center of the back surface of the lighting cover, and a substantially chevron-shaped convex part is provided around the convex part, so that substantially parallel light is incident on each of the convex part and the convex part. The illuminance on the illumination surface by the radiated light radiated at each radiation angle is set to be substantially uniform, and the inclination angle of the side surface of the convex portion and the side surface of the convex strip is set to the top of the convex portion and the convex strip. Gradually steeply toward the top, the convex part and the Article by, and controlling the light distribution of the substantially parallel light of the irradiation light of the light source module.

Moreover, the lighting cover or the lighting fixture for indoor / outdoor illumination according to the present invention is configured such that the side surface of the convex line, the side surface of the convex part, or the inclination angle of the convex part and the side surface of the convex line, ² / Cos ² It is set based on θ4 (I: luminous flux, E: illuminance with respect to the illumination surface, h: distance from the LED light source to the illumination surface, θ4: radiation angle of emitted light from the illumination cover).

The lighting cover or the lighting fixture for indoor / outdoor lighting according to the present invention includes a light source of an LED having a predetermined directivity and a reflector that reflects the light emitted from the LED light source. A light source module for indoor / outdoor illumination, comprising: a light source module that irradiates as substantially parallel light; and a translucent illumination cover installed in a light irradiation direction of the light source module. It is a luminaire, and is provided with a substantially chevron-shaped ridge or protrusion regularly on the back surface of the lighting cover, and an outwardly protruding round portion is formed at the skirt of the ridge or protrusion, The light distribution of the substantially parallel light emitted from the light source module is controlled by the convex line or the convex part.

Claims (10)

A translucent lighting cover installed in the light irradiation direction of a light source module that emits substantially parallel light from a lighting fixture for indoor / outdoor lighting, and has a substantially chevron-shaped protrusion or protrusion regularly arranged on the back surface. The illumination cover is characterized in that the light distribution of the light emitted from the light source module is controlled by the unit. The lighting cover according to claim 1, wherein an outwardly convex rounded portion is formed on a skirt of the substantially mountain-shaped convex stripe or convex portion. 4. The illumination cover according to claim 2, wherein the substantially mountain-shaped convex portion is a substantially conical convex portion or a substantially pyramidal convex portion. The said substantially chevron-shaped convex stripe is arrange | positioned in stripe form, or the said substantially chevron-shaped convex part is arrange | positioned in a grid | lattice form, zigzag form, or concentric form, The one in any one of Claims 1-3 characterized by the above-mentioned. Lighting cover. The inclination angle of the side surface of the substantially chevron-shaped convex stripe or the side face of the substantially chevron-shaped convex part is gradually made steeper toward the top part of the convex part or the top part of the convex part. The lighting cover according to any one of the above. The side surface of the substantially chevron-shaped ridge or the side surface of the substantially chevron-shaped convex part is composed of a plurality of slope regions in which the inclination angle gradually becomes steeper toward the top of the ridge or the top of the convex part. The lighting cover according to claim 5, wherein the slope region having a steeper inclination angle is formed to have a longer length in the horizontal direction when viewed from the front. The length of the plurality of slope areas in the front view in the horizontal direction is set so that the illuminance of illumination light at each radiation angle incident on each slope area and radiated from the illumination cover is substantially uniform. The lighting cover according to claim 6. The illumination cover according to any one of claims 1 to 7, wherein the projections or the projections are respectively provided corresponding to a plurality of irradiation areas having different average light flux densities of irradiation light of the light source module. . An illumination fixture for indoor / outdoor illumination comprising: the illumination cover according to claim 1; and a light source module that emits substantially parallel light. The lighting fixture according to claim 9, wherein a plurality of the light source modules are arranged adjacent to each other, and the illumination cover is provided corresponding to the plurality of light source modules arranged side by side.

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