JP4436396B2 - Lighting module, light source unit, and lighting fixture - Google Patents

Description

  The present invention relates to an illumination module, a light source unit, and a luminaire in which a light source such as an LED is provided on a substantially top portion of a reflector.

  2. Description of the Related Art Conventionally, an illumination module is known in which an LED is provided as a light source at a substantially top portion of a reflector. For example, Patent Document 1 describes an illumination module in which a plurality of LED elements and a lens corresponding to each LED element constitute an LED light source part, and the LED light source part is provided at a substantially top part of a reflector.

JP 2004-296249 A

  By the way, in an illumination module in which a light source is provided substantially at the top of the reflector, it is desirable to irradiate light from the illumination module while controlling the light as parallel light as much as possible in order to make effective use of light emission from the light source. Therefore, there is a need for an illumination module that can illuminate the light emitted from the light source more in parallel.

  The present invention is proposed in view of the above-described problems, and in an illumination module in which a light source is provided at a substantially top part of a reflector, the light emitted from the light source can be made more parallel and radiated to the outside to increase the light use efficiency. It aims at providing a lighting fixture provided with a module, a light source unit, and the said lighting module.

  The illumination module of the present invention is a lighting module in which a light source is provided at a substantially top portion of a substantially parabolic reflector, and a lens having a concave curved surface formed at the center and a convex curved surface formed outside the concave curved surface. Provided around the light source, the curvature of the convex curved surface is set so that the light emitted from the light source passing through the convex curved surface is reflected by the reflector and irradiated to the outside as substantially parallel light, and passes through the concave curved surface The curvature of the concave curved surface is set so that the irradiation light of the light source is irradiated to the outside as substantially parallel light in substantially the same direction as the substantially parallel light reflected by the reflector. The illumination module includes a configuration in which a light source is provided in a dotted shape at a substantially top portion of a substantially bowl-shaped reflector, a configuration in which a light source is provided in a linear shape along the longitudinal direction at a substantially top portion of a substantially bowl-shaped reflector.

  The illumination module of the present invention is characterized in that the light source is an LED light source. In addition, although an appropriate light source other than the LED light source can be used as the light source, it is preferable to use a light source having directivity similar to the LED light source.

  In the illumination module of the present invention, the lens is a convex lens having the concave curved surface formed at the center, the convex curved surface is a substantially hemispherical surface centered on the optical center of the light source, and the lens is the light source. It is closely arranged around the light source.

  The light source unit of the present invention is a light source unit provided at a substantially top portion of a substantially parabolic reflector, and includes a lens having a concave curved surface formed at the center and a convex curved surface formed outside the concave curved surface. Provided around the light source, the curvature of the convex curved surface is set so that the irradiation light of the light source passing through the convex curved surface is reflected by the reflector and irradiated to the outside as substantially parallel light, and passes through the concave curved surface The curvature of the concave curved surface is set so that the irradiation light of the light source is irradiated to the outside as substantially parallel light in substantially the same direction as the substantially parallel light reflected by the reflector. The light source unit includes a light source unit provided in a dot shape at a substantially top portion of a substantially bowl-shaped reflector, and a light source unit provided in a line shape along the longitudinal direction at a substantially top portion of a substantially bowl-shaped reflector.

  The lighting fixture of the present invention includes a plurality of lighting modules according to the present invention in which a light source is provided in a dot shape at a substantially top portion of a substantially bowl-shaped reflector, and corresponds to the plurality of lighting modules arranged in parallel. A light diffusing and translucent lighting cover is provided on the screen. In a configuration in which a plurality of lighting modules are arranged in parallel, a substrate may be provided corresponding to each light source such as an LED, but a plurality of light sources such as an LED mounting substrate on which a plurality of LEDs are mounted on a substrate are mounted. It is preferable to use a configuration mounted on a substrate because an effect such as cost and downsizing can be obtained. Moreover, it is also possible to adopt a configuration in which a translucent illumination cover is provided on the light irradiation side corresponding to a single illumination module.

  Further, in the lighting fixture of the present invention, the back surface of the light cover on the light incident side is regularly provided with substantially mountain-shaped protrusions or protrusions, and the inclination angle of the side surfaces of the protrusions or the side surfaces of the protrusions is It is characterized by being gradually steep toward the top of the ridge or the top of the ridge. The substantially chevron-shaped protrusions may be configured to be arranged in a stripe shape, for example, and the approximately chevron-shaped protrusions may be configured to be disposed in, for example, a lattice shape, a staggered shape, or a concentric shape, and the like. The substantially mountain-shaped convex portion can be conical or pyramidal.

  In addition to the configurations of the inventions and embodiments, the invention disclosed in this specification is specified by changing these partial configurations to other configurations disclosed in this specification within the applicable range. Specified by adding other configurations disclosed in the present specification to the extent applicable to these configurations, or by deleting these partial configurations to the extent that partial effects can be obtained. The higher level conceptualization is also included.

  In the present invention, the curvature of the convex curved surface of the lens provided around the light source is set so that the irradiation light of the light source passing through the convex curved surface is reflected by the reflector and irradiated to the outside as substantially parallel light, and the concave curved surface of the lens Is set so that the irradiation light of the light source that passes through the concave curved surface is irradiated to the outside as the substantially parallel light in substantially the same direction as the reflection of the reflector. Irradiation to the outside is possible, and light utilization efficiency can be increased. Moreover, since the illumination module can emit substantially parallel light as a whole, the light distribution control by the illumination cover etc. after the emission can be facilitated and appropriate light distribution control such as obtaining more uniform illumination can be performed. It can be done more accurately.

  Further, by using an LED light source having a directional light distribution characteristic as a light source, the ease and accuracy of light distribution control can be significantly improved.

  In addition, the lens is a convex lens having a concave curved surface at the center, and the convex curved surface of the lens is a substantially hemispherical surface centered on the optical center of the light source, thereby preventing refraction at the lens interface and preventing the optical center of the light source. Therefore, it is possible to irradiate the reflector as substantially linear light, so that the light distribution control can be facilitated for the reflector or the illumination module as a whole. Further, by providing the lens in close proximity to the light source and surrounding the light source, excessive refraction generated between the lens and the light source can be prevented as much as possible, and the accuracy of light distribution control can be improved.

  In addition, a plurality of illumination modules provided with a light source in a dot shape are arranged in parallel at a substantially top portion of a substantially bowl-shaped reflector, and light diffusive and translucent illumination is provided on the light irradiation side corresponding to the plurality of illumination modules arranged in parallel. By providing a cover, the illumination light of each illumination module can be mixed and the uniformity of illumination by a lighting fixture can be improved. In addition, since it is possible to control the light distribution with the lighting cover, it is possible to easily control the light distribution at a low cost and to obtain an appropriate light distribution, and to easily change the light distribution according to the spatial design. it can. In addition, by controlling the light distribution with the lighting cover, it is possible to promote the standardization and standardization of the lighting modules.

  Also, a substantially chevron-shaped ridge or protrusion is provided on the back side of the light incident side of the illumination cover, and the inclination angle of the side surface of the protrusion or the side surface of the protrusion is set at the top of the protrusion or the top of the protrusion. By making it gradually steeper, it is possible to assign a large luminous flux to the irradiation light having a relatively large radiation angle, and to improve the uniformity of the illuminance on the illumination surface by the luminaire.

  An illumination module according to an embodiment of the present invention, a light source unit of the illumination module, and a lighting fixture including the illumination module will be described with reference to the drawings.

  As shown in FIGS. 1 to 4, the illumination module 1 according to the present embodiment is placed on the substrate 2 so as to be positioned at a substantially top portion of a disk-shaped substrate 2 that is an LED mounting substrate and a reflector 4 described later. The light source unit 3 provided in a shape and a substantially bowl-shaped reflector 4 curved in a substantially parabolic shape are provided. The light source unit 3 includes an LED 5 constituting a light source of the light source unit 3 and a lens 6 provided in close proximity to the periphery of the LED 5. The LED 5 is a disk-shaped chip type, and is fixed on a mounting portion 21 provided so as to protrude from the substrate 2. The paraboloid of the reflector 4 is formed so that the reflection angle = 45 degrees + (incident angle / 2) so that the reflected light is emitted as parallel light from the opening.

  The lens 6 has a shape in which a dish-like concave curved surface 62 is formed at the center of the outer surface of a substantially hemispherical convex lens, and the convex curved surface 61 is formed on the outer outer surface (outer peripheral surface) of the central concave curved surface 62. . In the lens 6, the LED 5 that is a light source is accommodated so as to correspond to the center of the concave curved surface 62, and the LED 5 and the attachment portion 21 are accommodated in close contact with the inner surface of the lens 6. Both end portions of the lens 6 are fixed to the substrate 2.

  The curvature of the convex curved surface 61 is formed by irradiating the reflector 4 with the irradiation light of the LED 5 passing through the convex curved surface 61, reflecting the reflected light on the reflector 4, and irradiating the reflector opening as substantially parallel light to the outside. Can be set as appropriate based on the refractive index of the lens material, but the convex curved surface 61 of this example has a substantially hemispherical shape centered on the light center of the LED, and the irradiation light from the light center is linear. The structure is such that it can be guided to the reflector 4. That is, the irradiation light of the LED 5 that passes through the convex curved surface 61 proceeds linearly to the A region and the A ′ region as shown in FIGS. 3 and 4, and is irradiated to the reflector 4, and as shown in FIG. The light is reflected by the reflector 4 and is irradiated to the outside as substantially parallel irradiation light AL.

  The area A has a reference horizontal line H extending in the horizontal direction from the optical center of the LED 5 and a predetermined inclination angle (60 degrees in this example, preferably 50 degrees to 65 degrees in this example) with respect to the reference horizontal line H. The region A ′ between the region dividing line α extending from the optical center is a reference horizontal line H and a predetermined negative inclination angle with respect to the reference horizontal line H (10 degrees in this example, preferably 5 degrees to 15 degrees). Degree), and the region dividing line β extending from the light center of the LED 5 to the end of the reflector 4 capable of irradiating light. Irradiated light near the horizontal with respect to the region dividing line α is reflected by the reflector 4. It is guided to the light path reflected by.

  The curvature of the concave curved surface 62 is formed by setting the curvature so that the irradiation light of the LED 5 passing through the concave curved surface 62 can be irradiated as substantially parallel light from the opening side of the reflector 4, and the curvature is appropriately determined from the refractive index of the lens material. Set. The irradiation light of the LED 5 passing through the concave curved surface 62 proceeds to the region B in FIG. 3, and is irradiated to the outside as substantially parallel irradiation light BL as shown in FIGS. The region B is a region having a reference vertical line V extending vertically from the light center of the LED 5 and a predetermined inclination angle (30 degrees in this example, preferably 25 to 40 degrees in this example) with respect to the reference vertical line B. It is an area between the dividing line α, and irradiation light close to the area dividing line α follows the optical path that is directly reflected as parallel light without being reflected by the reflector 4. Then, the substantially parallel irradiation light AL due to the passage of the convex curved surface 61 and the reflection of the reflector 4 and the substantially parallel irradiation light BL due to the passage of the concave curved surface 62 are irradiated substantially parallel to each other as substantially parallel light in substantially the same direction. Irradiated outside.

  Next, the lighting fixture 100 provided with the lighting module 1 of the said embodiment is demonstrated.

  As shown in FIGS. 5 and 6, the luminaire 100 includes a plurality of illumination modules 1 arranged adjacent to each other so that the opening side of the reflector 4 is aligned, and the light illumination side (reflector) with respect to the plurality of illumination modules 1 arranged in parallel. 4) is provided with a light diffusive and translucent illumination cover 110, and the substantially parallel illumination lights AL and BL emitted from each illumination module 1 are diffused by the illumination cover 110 and emitted as illumination light L. Is.

  The illumination cover 110 is formed of an acrylic resin or the like, and is a long rectangular flat substrate 111 and a substantially mountain-shaped convex line having a substantially isosceles triangular shape in front view and formed on the upper surface of the substrate 111 on the light incident side. 112. The ridges 112 extend along the longitudinal direction of the illumination cover 110, and are formed in a plurality of strips at a predetermined pitch in the width direction of the illumination cover 110, and are regularly formed in stripes.

  In FIG. 7, 113 is a side surface that is an inclined surface of the ridge 112, 114 is a ridge line corresponding to the top of the ridge 112, and 115 is a valley line between the ridges 112 and 112 corresponding to the bottom of the ridge 112. is there. The ridge 112 has an inclined surface whose angle of inclination gradually becomes steeper from the valley line 115 toward the ridge line 114, and the inclined surface has a substantially parabolic shape protruding downward. Thereby, it is possible to increase the incident angle θ1 and the emission angle θ2 of the substantially parallel light irradiated from the upper side of the ridge 112 toward the portion closer to the ridgeline 114 and smaller toward the portion closer to the valley line 115. It has become.

  In the above configuration, the region with a large inclination angle adjacent to the ridgeline 114 receives more light flux and refracts the radiation angle θ2 so as to be larger, and radiates more light flux as illumination light at a large radiation angle θ2 ( Optical path L1). Also, the region relatively close to the valley line 115 and having a relatively small inclination angle receives a small amount of light and refracts so that the radiation angle θ2 is relatively small, and a relatively small light beam at a relatively small radiation angle θ2. Are emitted as illumination light (optical path L2). And the illuminance on the illumination surface of the illumination light having a large radiation angle θ2 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 θ2 and a short distance to the illumination surface, Since the illuminance on the illumination surface of the illumination light at the radiation angle θ2 is substantially the same, it is possible to illuminate the illumination surface with substantially uniform illuminance.

  The lighting module 1, the light source unit 3, and the lighting fixture 100 according to the above embodiment can irradiate the light emitted from the LED 5 with the light intensity near the center of the light source being almost completely parallelized. Can improve the efficiency of use. Moreover, since the illumination module 1 irradiates almost perfect parallel light to the outside, the light distribution control of the subsequent light becomes extremely easy, and appropriate light distribution control such as obtaining more uniform illumination is performed more accurately. Can do. Further, by making the convex curved surface 61 of the lens 6 a substantially hemispherical surface centered on the light center of the LED 5, it becomes possible to irradiate the reflector 4 as linear light from the light center of the LED 5, so that light distribution control is further performed. Can be facilitated. Further, by providing the lens 6 in close proximity to the LED 5 and around the LED 5, extra refraction generated between the lens 6 and the LED 5 can be prevented as much as possible, and the accuracy of light distribution control can be further improved.

  In addition, by providing the illumination cover 110 in the luminaire 100, the illumination light of each illumination module 1 can be mixed and the uniformity of illumination can be improved. In addition, since it is possible to control the light distribution with the illumination cover 110, it is possible to easily control the light distribution at a low cost and to obtain an appropriate light distribution, and to easily change the light distribution according to the spatial design. Furthermore, the common use and standardization of the lighting module 1 can be promoted. In addition, the projection 112 is provided on the back side of the light incident side of the illumination cover 110, and the inclination angle of the side surface of the projection 112 is gradually steeper toward the top of the projection 112, so that irradiation with a relatively large radiation angle is performed. By assigning a large luminous flux to the light, it is possible to improve the uniformity of the illuminance on the illumination surface by the luminaire.

  In addition, in the illumination module 1 of the said embodiment, although it was set as the structure which arrange | positions LED5 which is a light source at the substantially top part of the substantially bowl-shaped reflector 4, it is along the longitudinal direction at the substantially top part of the substantially bowl-shaped reflector, for example. It is also possible to provide a lighting module or a lighting fixture in which LEDs are linearly provided, such as by providing LEDs 5 at a predetermined interval. The above-described configuration is, for example, a configuration in which the lighting module 1 of FIG. 1 and the lighting fixture 100 of FIG.

  Moreover, in the lighting fixture 100 in which a plurality of the lighting modules 1 are arranged side by side, the substrate 2 is provided corresponding to each of the LEDs 5, but an LED mounting substrate (chip-on-chip) in which a plurality of LEDs 5 are mounted on the substrate 2. LED) is preferably used, which is advantageous in terms of cost and size reduction. Moreover, it is also possible to provide a luminaire by providing a translucent illumination cover 110 on the light irradiation side corresponding to the single illumination module 1.

  Moreover, in the said lighting fixture 100, it was set as the structure which provided the substantially chevron-shaped protruding item | line 112 in the back surface of the light-incidence side of the illumination cover 110, but it replaced with the said protruding item | line 112, and has substantially mountain-shaped convex parts, such as a cone shape and a pyramid shape. It is good also as a structure arrange | positioned regularly. The regular arrangement of the convex portions can be, for example, a lattice shape, a staggered shape, a concentric shape, or the like. Moreover, also in the said convex part, it is preferable to make the inclination | tilt angle of the side surface of the said convex part become steep gradually toward the top part from the bottom part of the said convex part similarly to the protruding item | line 112 of this example.

  The present invention can be used, for example, for lighting equipment for indoor lighting or outdoor lighting.

The longitudinal section explanatory drawing of the illumination module of embodiment in the state which turned up the irradiation direction. The bottom view of the illumination module of FIG. FIG. 2 is a partial longitudinal explanatory view showing an A region, an A ′ region, and a B region in the light source unit of the illumination module of FIG. 1. FIG. 2 is a partial longitudinal explanatory view showing an optical path of A region and A ′ region and an optical path of B region in the light source unit of the illumination module of FIG. 1. A bottom view of a lighting fixture provided with the lighting module of an embodiment. The longitudinal section explanatory drawing of a lighting fixture provided with the illumination module of embodiment. FIG. 7 is a partially enlarged explanatory view of a lighting cover in the lighting apparatus of FIG. 6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Illumination module 2 ... Board | substrate 21 ... Mounting part 3 ... Light source unit 4 ... Reflector 5 ... LED 6 ... Lens 61 ... Convex curved surface 62 ... Concave curved surface 100 ... Lighting fixture 110 ... Illumination cover 111 ... Base | substrate 112 ... Convex strip 113 ... Side surface 114 ... ridge line 115 ... valley line H ... reference horizontal line V ... reference vertical line α, β ... region division line A ... A region, A '... A' region B ... B region AL ... light path of light in the A region and A 'region BL: Optical path of light in region B L, L1, L2: Optical path of irradiation light of lighting equipment θ1: Incident angle θ2: Radiation angle

Claims (6)

An illumination module that provides a light source substantially at the top of a substantially parabolic reflector,
A concave curved surface is formed at the center, and a lens having a convex curved surface formed outside the concave curved surface is provided around the light source,
The curvature of the convex curved surface is set so that the irradiation light of the light source passing through the convex curved surface is reflected by the reflector and irradiated to the outside as substantially parallel light,
The curvature of the concave curved surface is set so that irradiation light of the light source passing through the concave curved surface is irradiated to the outside as substantially parallel light in substantially the same direction as the substantially parallel light reflected by the reflector. Lighting module.   The illumination module according to claim 1, wherein the light source is an LED light source. The lens is a convex lens having the concave curved surface formed in the center, and the convex curved surface is a substantially hemispherical surface centered on the optical center of the light source,
The illumination module according to claim 1, wherein the lens is provided around the light source in close contact with the light source. A light source unit provided at a substantially top portion of a substantially parabolic reflector,
A concave curved surface is formed at the center, and a lens having a convex curved surface formed outside the concave curved surface is provided around the light source,
The curvature of the convex curved surface is set so that the irradiation light of the light source passing through the convex curved surface is reflected by the reflector and irradiated to the outside as substantially parallel light,
The curvature of the concave curved surface is set so that irradiation light of the light source passing through the concave curved surface is irradiated to the outside as substantially parallel light in substantially the same direction as the substantially parallel light reflected by the reflector. Light source unit.   A plurality of illumination modules according to any one of claims 1 to 3, wherein a plurality of illumination modules according to any one of claims 1 to 3 are provided in a dot shape at a substantially top portion of a substantially bowl-shaped reflector, and the light irradiation side is provided corresponding to the plurality of illumination modules arranged in parallel. A lighting fixture comprising a light diffusing and translucent lighting cover.   A substantially chevron-shaped protrusion or protrusion is provided on the rear surface of the light cover on the light incident side, and the inclination angle of the side surface of the protrusion or the side surface of the protrusion is directed toward the top of the protrusion or the top of the protrusion. 6. The lighting fixture according to claim 5, wherein the lighting fixture is gradually steep.

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