JP2011100644A - Illumination cover, its manufacturing method, and lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to obtain appropriate light distribution and aim at improvement of uniformity of illuminance of irradiation light from a lighting fixture and alleviation of glare, in case the light distribution of a light source module is controlled irradiating nearly parallel light with LEDs as a light source. <P>SOLUTION: In the translucent illumination cover 30 arranged at a light-irradiation direction of a light source module 20 irradiating nearly parallel light with the LEDs as a light source, protrusions 32 of nearly a chevron shape are regularly arranged on a face of the illumination cover 30 at a light source module 20 side, and a plurality of micro recesses 33 are formed over a given area on a face of the illumination cover 30 opposite to the light source module side. Preferably, a depth of the micro recess 33 is to be 0.3 μm to 500 μm, and the recesses are to be formed at random positions with a density of 50 to 2,000 recesses per 1 mm<SP>2</SP>. <P>COPYRIGHT: (C)2011,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 using a light emitting diode (LED) as a light source.

  There exists a lighting fixture of patent document 1 as a lighting fixture which controls the light distribution of the light source module which irradiates substantially parallel light using a light emitting diode (LED) as a light source. The lighting fixture of patent document 1 has a light source module which has an LED light source and a reflector that reflects the light emitted from the LED light source, and irradiates the light emitted from the LED light source as substantially parallel light, and in the light irradiation direction of the light source module. A light-transmitting lighting cover to be installed, and a regular mountain-shaped protrusion or protrusion is regularly arranged on the back of the lighting cover, and the light distribution of the light source module is distributed by the protrusion or protrusion. It is something to control.

JP 2007-335400 A

  By the way, although the lighting fixture of patent document 1 can obtain suitable light distribution by the convex strip or convex part of a lighting cover back surface, the point of the improvement of the uniformity of the illumination intensity of the light irradiated from a lighting fixture, or the relief | moderation of glare Is still not enough. Therefore, there is a demand for a configuration that can improve the uniformity of the illuminance of light emitted from the luminaire and reduce glare.

  The present invention is proposed in view of the above problems, and when controlling the light distribution of a light source module that emits substantially parallel light using a light emitting diode (LED) as a light source, an appropriate light distribution can be obtained, An object of the present invention is to provide a lighting cover, a method of manufacturing the same, and a lighting fixture that can improve the uniformity of the illuminance of light emitted from the lighting fixture and mitigate glare.

The illumination cover of the present invention is a translucent illumination cover installed in the light irradiation direction of a light source module that emits substantially parallel light using an LED as a light source, and has a substantially chevron-shaped surface on the light source module side of the illumination cover. Convex ridges or convex portions are regularly arranged, and fine concave portions, fine convex portions, or both are directly formed over a predetermined region on the surface opposite to the light source module of the lighting cover.
In the above configuration, when controlling the light distribution of the light source module that irradiates the substantially parallel light using the LED as the light source, it is possible to obtain an appropriate light distribution by the substantially chevron-shaped ridges or convex portions, and the fine concave portions and the fine convex portions. By the unit, it is possible to improve the uniformity of the illuminance of the irradiation light from the lighting fixture and to reduce the glare. Furthermore, it is possible to reduce the density of light emitted from the illumination cover. In addition, by forming the fine concave portions and the fine convex portions directly on the lighting cover having a light distribution function, it is possible to eliminate, for example, a large decrease in light efficiency that occurs when a diffusion sheet is provided on the light emitting side of the lighting cover. In addition, it is possible to improve the efficiency of a lighting fixture composed of a light source module and a lighting cover. Furthermore, it is possible to reduce the number of components, reduce the tool cost, and reduce the assembly process.

The illumination cover of the present invention is characterized in that the depth of the fine concave portion, the height of the fine convex portion or both thereof is 0.3 μm to 500 μm, and is formed at a density of 50 to 2000 per 1 mm ² . More preferably, the depth of the fine concave portion, the height of the fine convex portion, or both are 0.5 μm to 20 μm, more desirably 0.5 μm to 10 μm, and a density of 200 to 1000 per 1 mm ^2. It is characterized by forming.
In the above-described configuration, it is possible to more reliably realize high-level uniformity of illuminance of irradiation light from the lighting fixture, mitigation of glare, and mitigation of light shading.

The illumination cover according to the present invention is characterized in that the fine concave portions, the fine convex portions, or both are formed at random positions.
In the said structure, manufacture of a lighting cover can be made easy by formation in a random position, and the freedom degree of a manufacturing method can be raised.

The lighting cover manufacturing method of the present invention is installed in the light irradiation direction of a light source module that emits substantially parallel light using an LED as a light source, and substantially chevron-shaped protrusions or protrusions are regularly arranged on the surface of the light source module. A method of manufacturing a translucent lighting cover in which a plurality of fine recesses are formed over a predetermined area on the surface opposite to the light source module, wherein fine particles are continuously applied to the predetermined area of the lighting cover. In this manner, the method includes a step of forming the fine concave portion or both the fine concave portion and the fine convex portion.
With the above-described configuration, it is possible to easily form the optimum fine concave portion or both the fine concave portion and the fine convex portion at low cost. Moreover, a fine recessed part or both a fine recessed part and a fine convex part can be formed in the lighting cover which has completed the basic shape.

The lighting cover manufacturing method of the present invention is installed in the light irradiation direction of a light source module that emits substantially parallel light using an LED as a light source, and substantially chevron-shaped protrusions or protrusions are regularly arranged on the surface of the light source module. A method of manufacturing a translucent lighting cover in which a plurality of fine concave portions, fine convex portions, or both of them are formed over a predetermined area on the surface opposite to the light source module, wherein the convex stripes or the convex portions In a mold in which a molding concave groove or molding concave portion is formed at a position corresponding to, and a molding micro convex portion, molding micro concave portion or both are formed at a position corresponding to the fine concave portion, the fine convex portion or both. A step of pouring resin to form a lighting cover is provided.
With the above-described configuration, it is possible to easily form an optimal fine concave portion, fine convex portion, or both at low cost. Moreover, the illumination cover which has a micro recessed part, a micro convex part, or both together with a substantially chevron-shaped protruding item | line or convex part can be formed at once, and improvement of manufacturing efficiency and reduction of manufacturing cost can be aimed at.

The lighting fixture of the present invention includes a light source module that irradiates substantially parallel light using an LED as a light source, and a translucent lighting cover that is installed in a light irradiation direction of the light source module, on the light source module side of the lighting cover. Providing regular chevron strips or projections regularly on the surface, and directly forming the fine concave portions, the fine convex portions, or both over a predetermined area on the surface opposite to the light source module of the lighting cover. Features.
In the above configuration, when controlling the light distribution of the light source module that irradiates the substantially parallel light using the LED as the light source, it is possible to obtain an appropriate light distribution by the substantially chevron-shaped ridges or convex portions, and the fine concave portions and the fine convex portions. By the unit, it is possible to improve the uniformity of the illuminance of the irradiation light from the lighting fixture and to reduce the glare. Furthermore, it is possible to reduce the density of light emitted from the illumination cover. In addition, by forming the fine concave portions and the fine convex portions directly on the lighting cover having a light distribution function, it is possible to eliminate, for example, a large decrease in light efficiency that occurs when a diffusion sheet is provided on the light emitting side of the lighting cover. In addition, it is possible to improve the efficiency of a lighting fixture composed of a light source module and a lighting cover. Furthermore, it is possible to reduce the number of components, reduce the tool cost, and reduce the assembly process.

  By using the present invention, when controlling the light distribution of a light source module that emits substantially parallel light using an LED as a light source, it is possible to obtain an appropriate light distribution by means of substantially chevron-shaped ridges or protrusions, and fine recesses. The fine projections can improve the uniformity of the illuminance of the irradiation light from the lighting fixture and mitigate glare. Furthermore, it is possible to reduce the density of light emitted from the illumination cover. In addition, by directly forming the fine recesses and fine protrusions on the lighting cover having a light distribution function, the efficiency of the lighting equipment composed of the light source module and the lighting cover is improved, the number of components is reduced, and the equipment cost is reduced. And the assembly process can be reduced.

The longitudinal section front view of the lighting fixture of embodiment. (A) is a top view of the illumination cover in the lighting fixture of FIG. 1, (b) is the bottom view. (A) is a partial longitudinal front explanatory view of the lighting cover, (b) is a partially enlarged bottom view. (A) is a partial top view of the modification of a lighting cover, (b) is the partial longitudinal cross-sectional view.

[Lighting Cover and Lighting Device of Embodiment]
An illumination cover and an illumination fixture according to an embodiment of the present invention will be described with reference to the drawings. 1 is a longitudinal front view of the lighting fixture of the embodiment, FIG. 2 (a) is a plan view of the lighting cover in the lighting fixture of FIG. 1, FIG. 2 (b) is a bottom view thereof, and FIG. FIG. 3B is a partially enlarged bottom view of the partially longitudinal front view.

  As shown in FIG. 1, the lighting fixture 10 of this embodiment is installed in the light irradiation direction of the light source module 20 which irradiates substantially parallel light using LED as a light source, and has a lens function and a light diffusion function. And a translucent illumination cover 30.

  The light source module 20 is provided in an LED light source 21 that is linearly provided along the direction perpendicular to the paper surface of FIG. 1 and a substantially light irradiation area of the LED light source 21, and is a front view parabolic shape along the direction perpendicular to the paper surface of FIG. The reflector 22 provided in the housing is housed in the housing 23, and power is supplied to the LED 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. Thus, the LED light source 21 connected to the control board is turned on / off.

  The LED light source 21 is installed at the focal position of the reflector 22 on the paraboloid, and the irradiation light emitted from the LED light source 21 upward in the figure is reflected by the reflector 22 and the reflected light is shown in the figure as substantially parallel light. It comes to be irradiated. The two-dot chain line shown is an optical path.

  As shown in FIGS. 1 and 2, the illumination cover 30 has a substantially rectangular shape in plan view formed of a light-transmitting material such as acrylic resin, and is a fixture that is omitted from the drawing at a predetermined position below the light source module 20. It is fixed in a detachable manner. On the surface of the base 31 of the lighting cover 30 on the side of the light source module 20, a plurality of convex ridges 32 having a substantially isosceles triangular shape in front view and a substantially mountain shape are directly formed on the base 31, and the ridges 32 are regularly formed in a stripe shape. Is formed.

  The ridges 32 have a lens function and have a slope whose slope gradually becomes steeper from the valley line 322 toward the ridge line 321. Then, as shown in FIG. 3, the protrusion 32 has an incident angle θ <b> 1 with respect to the illumination cover 30 of substantially parallel light irradiated from the upper side of the protrusion 32 and the surface opposite to the light source module 20 is flush. The radiation angle θ2 is increased as the portion is closer to the ridge line 321 and is decreased as the portion is closer to the valley line 322, so that the illuminance with respect to the illumination surface is made substantially uniform.

As shown in FIGS. 2 and 3, a plurality of fine recesses 33 are formed on the surface of the base 31 of the illumination cover 30 opposite to the light source module 20 over the entire surface which is a predetermined region or the entire periphery. Is formed directly. The fine concave portion 33 has a light diffusing function, makes the light approached substantially uniformly by the ridges 32 more uniform and reduces glare. The fine recesses 33 of the present embodiment have a depth of 0.3 μm to 500 μm, preferably 0.5 μm to 20 μm, more preferably 0.5 μm to 10 μm, and 50 to 2000, preferably 200, per 1 mm ^2. Although it is formed at random positions with a density of 1 to 1000, it can be formed at other depths and densities or at regular positions.

  When the fine recess 33 is formed in the lighting cover 30, for example, if the predetermined area of the base 31 of the lighting cover 30 is formed by continuously striking fine particles such as stone blocks and alumina, the optimal fine recess 33 is reduced. This is suitable because it can be formed easily and cost-effectively, and the fine recess 33 can be formed in the lighting cover 30 having a basic shape. The number of hitting fine particles, the hitting time, and the hitting frequency can be appropriately adjusted as necessary.

  Further, as another example of the method of forming the fine concave portion 33 in the lighting cover 30, a molded concave groove is formed at a position corresponding to the convex stripe 32, and a molded fine convex portion is formed at a position corresponding to the fine concave portion 33. By using a mold and pouring a resin such as an acrylic resin into the mold, the illumination cover 30 having the ridges 32 on one surface and the fine recesses 33 on the other surface may be formed and formed. . In this example, the optimal fine recess 33 can be easily formed at low cost, and the illumination cover 30 having the fine recess 33 together with the substantially chevron shaped ridge 32 can be formed at a time, thereby improving the manufacturing efficiency. The manufacturing cost can be reduced, which is preferable.

  The lighting fixture 10 or the lighting cover 30 of the present embodiment can obtain an appropriate light distribution by the ridges 32, and can improve the illuminance uniformity of the irradiation light from the lighting fixture 10 and alleviate glare by the fine recesses 33. It is possible to reduce the density of emitted light. In addition, by forming the fine recesses 33 directly on the illumination cover 30 having a light distribution function, for example, it is possible to eliminate a large decrease in light efficiency that occurs when a diffusion sheet is provided on the light exit side of the illumination cover 30, for example. It is possible to improve the efficiency of the lighting fixture. Furthermore, it is possible to reduce the number of components, reduce the tool cost, and reduce the assembly process.

Further, the depth of the fine recess 33 is 0.3 μm to 500 μm, and it is formed with a density of 50 to 2000 per 1 mm ² , thereby improving the illuminance uniformity of irradiation light from the lighting fixture 10, reducing glare, Light shading can be more reliably achieved at a high level. In addition, by forming the fine recesses 33 at random positions, the lighting cover 30 can be easily manufactured and the degree of freedom of the manufacturing method can be increased.

[Modifications of Embodiment, etc.]
In addition to the configurations of the inventions and embodiments, the invention disclosed in the present specification includes those specified by changing these partial configurations to other configurations disclosed in the present specification, or these configurations. Also included are those specified by adding other configurations disclosed in the specification, or those superordinate concepts specified by deleting these partial configurations to the extent that partial effects can be obtained. Variations are also included.

For example, instead of the configuration in which the fine concave portion 33 is formed in the base 31 of the lighting cover 30, a configuration in which the fine convex portion is formed may be employed. Also in the case of forming fine convex portions, the height is set to 0.3 μm to 500 μm, preferably 0.5 μm to 20 μm, more preferably 0.5 μm to 10 μm, and 50 to 2000 pieces per 1 mm ² are preferable. For example, it is preferable to form at a density of 200 to 1000, or at random positions, or a combination thereof, because the same effect as described above can be obtained. Furthermore, it is also possible to have an uneven surface in which both the fine concave portions 33 having the depth and density and the fine convex portions having the height and density are formed.

In addition, as a manufacturing example in the case of forming a fine convex portion, for example, a mold in which a molding concave groove is formed at a position corresponding to the ridge 32 and a molding fine concave portion is formed at a position corresponding to the fine convex portion. It is preferable to use and mold a resin such as an acrylic resin into this mold because the same effect as described above can be obtained. Moreover, when manufacturing what has both the fine recessed part 33 and a fine convex part, the structure manufactured using the metal mold | die in which both the shaping | molding fine recessed part and the shaping | molding fine convex part are formed, or the illumination cover 30 A configuration in which fine particles are continuously applied to a predetermined region can be used.

  4 may be regularly formed on the surface of the lighting cover 30 on the light source module 20 side, instead of the protrusions 32. As shown in FIG. In the example of FIG. 4, a substantially conical and substantially convex portion 34 is formed on the surface of the base 31 of the illumination cover 30 on the light source module 20 side, and the convex portions 34 are regularly formed in a lattice shape. Yes. A fine concave portion or a fine convex portion (not shown) is formed on the surface of the base 31 opposite to the light source module 20. In addition, the shape of the protruding item | line 32 and the convex part 34 is an illustration, and is not limited to these shapes. Further, the light source module 20 may be configured by a point-like LED light source and a reflector formed in a parabolic umbrella shape, and may be combined with the illumination cover 30 having each configuration described above.

  The present invention can be used for lighting equipment for indoor lighting and outdoor lighting.

DESCRIPTION OF SYMBOLS 10 ... Lighting fixture 20 ... Light source module 21 ... LED light source 22 ... Reflector 23 ... Case 30 ... Illumination cover 31 ... Base | substrate 32 ... Convex 321 ... Ridge line 322 ... Valley line 33 ... Fine recessed part 34 ... Convex part

Claims (6)

A translucent illumination cover installed in the light irradiation direction of a light source module that emits substantially parallel light using an LED as a light source,
A regular mountain-shaped protrusion or protrusion is regularly arranged on the light source module side surface of the lighting cover,
A lighting cover, wherein a plurality of fine concave portions, fine convex portions, or both of them are formed over a predetermined region on a surface opposite to the light source module of the lighting cover. ^2. The illumination cover according to claim 1, wherein the depth of the fine concave portion, the height of the fine convex portion, or both of them is 0.3 μm to 500 μm, and is formed at a density of 50 to 2000 per 1 mm ^2. .   The illumination cover according to claim 1, wherein the fine concave portion, the fine convex portion, or both are formed at random positions. It is installed in the light irradiation direction of a light source module that emits substantially parallel light using an LED as a light source, and substantially chevron-shaped protrusions or protrusions are regularly arranged on the surface of the light source module, and the surface opposite to the light source module A method of manufacturing a translucent lighting cover in which a plurality of fine recesses are formed over a predetermined region of
The manufacturing method of the lighting cover characterized by including the process of forming the said fine recessed part or both the said fine recessed part and the said fine convex part by striking fine particle | grains continuously to the said predetermined area | region of a lighting cover. It is installed in the light irradiation direction of a light source module that emits substantially parallel light using an LED as a light source, and substantially chevron-shaped protrusions or protrusions are regularly arranged on the surface of the light source module, and the surface opposite to the light source module A manufacturing method of a translucent lighting cover in which a plurality of fine concave portions, fine convex portions or both of them are formed over a predetermined area of
Molded grooves or molded recesses are formed at positions corresponding to the ridges or the projected parts, and molded microprojections, molded microrecesses or both at positions corresponding to the fine recesses, the microprojections, or both. A method of manufacturing a lighting cover, comprising: forming a lighting cover by pouring resin into a formed mold. A light source module that emits substantially parallel light using an LED as a light source;
A translucent illumination cover installed in the light irradiation direction of the light source module;
A regular mountain-shaped protrusion or protrusion is regularly arranged on the light source module side surface of the lighting cover,
A lighting apparatus, wherein a fine concave portion, a fine convex portion, or both are directly formed over a predetermined region on a surface opposite to the light source module of the lighting cover.

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