WO2012111334A1

WO2012111334A1 - Lighting device and lighting system

Info

Publication number: WO2012111334A1
Application number: PCT/JP2012/001018
Authority: WO
Inventors: 克渡辺
Original assignee: 株式会社ラパンクリエイト
Priority date: 2011-02-16
Filing date: 2012-02-16
Publication date: 2012-08-23
Also published as: JPWO2012111334A1

Abstract

A lighting cover (10) is mounted to a holder (50) which holds a plurality of LEDs (60), in such a manner that a light introduction part (31) faces the plurality of LEDs (60). Said lighting cover (10) comprises: a surface (21) which is made from a translucent material, and from which light from a light introduction part (31) is discharged to the outside; and a plurality of small cavities (40) formed so as to overlap one another between the surface (21) and the light introduction part (31), and so as to conceal the light introduction part (31) from the surface (21).

Description

Lighting device and lighting system

The present invention relates to a lighting device and a lighting system including a plurality of lighting devices.

In Japanese Patent Publication No. 2003-151305 (Reference 1), one end of an acrylic resin capable of passing light in a rod shape is inserted and bonded to a base of a light bulb using a light-emitting diode as a light source. The tip of the rod is processed into a matte state, and the above transparent acrylic resin rod is filled with impurities that shine when exposed to light, and when the light emitting diode of the light source emits light, the transparent acrylic resin rod The acrylic resin rod can be manufactured in various lengths and thicknesses, and since the light emitting diodes have a variety of emission colors, a light bulb-type lighting device that shines with various lights is provided. It is described that it can be.

Multi-color light can be output by combining light of several colors obtained from a light source such as a light emitting diode (LED). On the other hand, a light diffusion film or sheet for reducing the glare of LED light and obtaining uniform brightness, for example, a white vinyl chloride sheet is provided. When this light diffusing film is used, the glare is reduced and the color and intensity of the output light are made uniform. Therefore, it is difficult to obtain a lighting cover that shines with light of various colors.

One aspect of the present invention is an illumination cover that is attached to a holder that houses a plurality of light emitting elements such that the light introduction portion faces the plurality of light emitting elements. The lighting cover is formed of a translucent material, and the surface from which the light from the light introduction part is emitted to the outside overlaps between the surface and the light introduction part so as to cover the light introduction part from the surface. And a plurality of small cavities formed on the substrate.

In this lighting cover, the light introduction part is covered and hidden from the surface by a plurality of small cavities so that it is not directly observed from the surface. For this reason, the light entering the lighting cover from the light emitting element is emitted from the surface after being scattered by at least one small cavity. Therefore, this lighting cover can reduce the glare of the light emitting element. On the other hand, the multiple lights of multiple light-emitting elements introduced into the lighting cover from the light introduction part are reflected or refracted on the surface or inside of the multiple small cavities, but the color and light direction are completely uniform. It will not be converted. That is, in this illumination cover, since a plurality of small cavities overlap each other, when a plurality of lights are reflected or refracted on the surface or inside of the small cavities, chromatic aberration is reversed, contrary to an optical lens. It spreads and disperses color, and light of various colors is emitted in various directions. Therefore, it is possible to provide a lighting cover that has both an antiglare effect and a function of emitting light of various colors.

Furthermore, in this lighting cover, since a plurality of small cavities overlap each other, the light introduced from the light introducing portion is diffusely reflected by the plurality of small cavities and reaches the surface. For this reason, a plurality of small cavities appear as the source of diffuse reflection or the center of light output from the surface. Therefore, a plurality of small cavities visible from the surface appear to shine.

It is desirable that the illumination cover has a light condensing part for condensing light from a plurality of light emitting elements toward the center of the illumination cover. It is easy to suppress leakage of light from the light introduction part. It is desirable that the light collecting part includes a convex shape or a Fresnel shape.

It is desirable that the density of the plurality of small cavities is higher in the light introducing portion than in the surface. It can suppress more efficiently that a light introduction part looks directly from the surface. Furthermore, it is desirable that the plurality of small cavities are disposed away from the surface, and the lighting cover has a transparent layer having a low density of the plurality of small cavities along the surface.

One form of the lighting cover has an upper part including a convex or spherical surface and a lower part including a bottom part forming a light introducing part. The lower part may have a columnar part in which a part of the lower part of the upper part protrudes in a columnar shape with respect to the bottom surface of the upper part, and at least a plurality of small cavities may be formed in the upper columnar part side and the columnar part. It can suppress more efficiently that a light introduction part looks directly from the surface.

It is desirable that the lighting cover further has some small cavities appearing at the bottom of the lower part. Due to the small cavity near the bottom surface, it is possible to more efficiently suppress the light from the light emitting element from directly reaching the surface. One form of the illumination cover is such that some of the small cavities are formed in a concave shape at the bottom of the lower part. The direction of the light that has entered the light introducing portion can be bent in various directions by the concave surface.

It is desirable that the bottom surface of the upper part of the lighting cover includes a matte contact surface that hits the holder. The attachment position of the illumination cover with respect to the holder can be determined by the contact surface, and an illumination cover that can be easily attached to and detached from the holder can be provided. Further, the contact surface is preferably a flat surface, and when light from the light emitting element leaks to the contact surface, it is easy to go straight to the surface of the lighting cover. Therefore, it is desirable that the contact surface be a matte surface by sandblasting or chemical treatment.

One of the different aspects of the present invention is an illumination device having the above-described illumination cover and a holder to which the illumination cover is attached. It is possible to provide an illumination device that is less dazzling, outputs a wide variety of colors, and allows a plurality of small cavities of the illumination cover to appear to shine.

One of the different aspects of the present invention is an illumination system having an illumination unit including a plurality of the illumination devices described above and a control unit that controls the color development of each of the plurality of illumination devices of the illumination unit. By controlling the color, timing, intensity, etc. of the light output from the light emitting elements of each lighting device that constitutes the lighting unit, various colors of light are transmitted through the lighting cover of each lighting device in various patterns. Can output. For this reason, it is possible to provide a lighting system that has a new visual effect and can be used in various spaces such as a stage, a studio, a theater, and a hall depending on the sensitivity of the user. One application example of an illumination system is an illumination system that can illuminate (produce) a space such as a stage with light of various colors.

The figure which showed the outline | summary of the illumination system typically. The figure which showed the outline | summary of the illuminating device. The figure which expanded and showed the illuminating device to the main parts which comprise an illuminating device. IV-IV sectional drawing of an illuminating device (IV-IV cross section of FIG. 2). It is the figure which looked at the illumination cover from each direction, (a) is a front view, (b) is a plan view, (c) is a bottom view, and (d) is a dd end view. The figure which showed the outline | summary of a different illuminating device. It is the figure which looked at the illumination cover shown in FIG. 6 from each direction, (a) is a front view, (b) is a bottom view. Furthermore, it is the figure which looked at the different illumination cover from each direction, (a) is sectional drawing, (b) is a bottom view. Furthermore, the figure which showed the outline | summary of the different illuminating device. The figure which expand | deployed and showed the illuminating device shown in FIG. 9 to the main parts which comprise an illuminating device. Furthermore, the figure which showed the outline | summary of the different illuminating device. It is the figure which looked at the illumination cover shown in FIG. 11 from each direction, (a) is a front view, (b) is a bottom view. Furthermore, it is the figure which looked at the different illumination cover from each direction, (a) is sectional drawing, (b) is a bottom view. Furthermore, it is the figure which looked at the different illumination cover from each direction, (a) is sectional drawing, (b) is a bottom view. FIG. 5 is a diagram showing an outline of a different illumination device, where (a) is a cross-sectional view and (b) is a cross-sectional view along bb. Furthermore, the figure which showed the outline | summary of the different illuminating device.

FIG. 1 schematically shows an outline of an illumination system (light emitting system) 100 that is one embodiment of the present invention. In FIG. 2, the outline | summary of the illuminating device 1 is shown with the perspective view. In FIG. 3, the illuminating device 1 is developed in main parts constituting the illuminating device 1 and is shown in a perspective view. FIG. 4 shows an IV-IV sectional view of the lighting device 1 (IV-IV section of FIG. 2).

The lighting system 100 of this example can be installed on a stage 9. The illumination system 100 includes an illumination unit (illumination block) 101 including a plurality of illumination devices 1 arranged along the wall surface of the stage 9 and a control unit 6 that controls the timing of color development of each of the plurality of illumination devices 1. Have.

In addition, although the illumination system 1 of this example is installed on the stage 9, the installation location is not limited to the stage. The lighting system 1 can be installed in a wide variety of spaces such as a store, a theater, a hall, a studio, a hotel, a museum, a conference room, a living room (house), and a multipurpose space. The same applies to the following embodiments.

The lighting unit 101 of this example includes a plurality of lighting devices 1 installed on the ceiling surface 9a of the stage 9, the left and right side wall surfaces 9b and 9c, and the floor surface 9d. Each of the plurality of lighting devices 1 is a holder (housing, cap) 50 that houses a plurality of LEDs (light emitting elements, light sources) 60, and an illumination that is attached to the holder 50 and diffuses and emits light emitted from the plurality of LEDs 60. And a cover (lighting fixture, cover member, light diffuser) 10. In addition, in this specification, a holder is a concept including the thing of the various shapes which can support (hold, fix, attach) a lighting cover.

The holder 50 includes a control box 4 that controls each LED 60 in addition to the plurality of LEDs 60. The control box 4 includes an LED controller 2 that controls the timing and intensity of light emission of the red LED 60R, the green LED 60G, and the blue LED 60B included in the plurality of LEDs 60, and a connector 3 that complies with the DMX standard.

Each lighting device 1 is daisy chain connected by a link cable 5 corresponding to the DMX standard. For this reason, the LED controller 2 of each illuminating device 1 is connected by the DMX data link. The link cable 5 is connected to a lighting control unit 6 that conforms to the DMX standard. For this reason, in this illumination system 100, the color, timing, intensity, and the like of each illumination device 1 can be freely controlled by the control unit 6. Further, in the illumination system 100, the stage 9 can be illuminated (produced) with light of various colors by programming a pattern including the timing and intensity of light emitted from each illumination device 1.

As shown in FIG. 3 and FIG. 4, the lighting device 1 includes a cylindrical holder 50 that houses a plurality of LEDs 60, and a hemispherical shape attached to the holder 50 so that the light introduction part 31 faces the plurality of LEDs 60 ( A dome-shaped lighting cover 10. The illumination cover 10 is made of a translucent resin as a whole, and includes a dome-shaped upper part 20a and a lower part 20b protruding downward in a columnar shape with respect to the upper part 20a. The upper portion 20 a includes a convex surface 21 from which light from the light introducing portion 31 is emitted to the outside, and a flat contact surface (bottom surface) 22 that contacts the upper surface 55 of the holder 50. The lower part 20 b includes a columnar part 30 in which a part (center part) 20 x on the lower side of the upper part 20 a surrounded by the bottom face 22 protrudes in a columnar shape with respect to the bottom face 22. In the illumination cover 10 of this example, the bottom surface (bottom portion) 32 of the columnar portion 30 is a light introducing portion 31.

The lighting cover 10 has various shapes including a shape in which a gas such as a sphere or an ellipse is present as a bubble in the liquid, or a shape close to them, formed (built-in, contained, enclosed) in the interior 10i of the lighting cover 10. It includes a plurality of small cavities 40 in shape. The plurality of small cavities 40 are formed so as to overlap each other between the surface 21 and the light introducing portion 31 and cover the light introducing portion 31 from the surface 21. One method of forming the plurality of small cavities 40 in the interior 10i of the lighting cover 10 is to enclose a plurality of bubbles generated by adding a foaming agent to acrylic resin when the lighting cover 10 is injection molded. It is.

The contact surface (bottom surface) 22 of the upper part 20 a is formed around the columnar part 30, and determines the mounting position of the illumination cover 10 with respect to the holder 50. The contact surface 22 is preferably a flat surface that can be easily attached to and detached from the holder 50. However, when light from the LED 60 enters (leaks out) the interior 10i of the lighting cover 10 from the contact surface 22, it may reach the surface 21 directly. . Therefore, it is desirable that the contact surface 22 be a matte surface by sandblasting or chemical treatment. The matting method is not limited to sandblasting, and known surface treatment methods such as cutting, etching, and embossing can be used. Instead of matting, the contact surface 22 may be painted with a color that easily absorbs light such as black.

The lighting cover 10 is integrally molded by injection molding or the like using a translucent resinous material (translucent material), typically acrylic resin. In addition, the material which forms the illumination cover 10 should just be a translucent material, and may use not only an acrylic resin but a polyester resin, a polystyrene resin, a polycarbonate resin, a polyvinyl chloride resin, respectively, Two or more may be mixed.

In this lighting device 1, the columnar portion 30 of the lighting cover 10 is directly fitted (attached) to the upper opening 52 of the holder 50. The lighting device 1 includes nine LEDs 60 arranged in a matrix at one (upper) end of the holder 50 toward the outside of the holder 50. Further, the lighting device 1 includes an LED board 61 that is housed in the interior 50 i of the holder 50 and is electrically connected by mounting the LED 60, and a driver board that is electrically connected to the LED board 61 via the four cables 63. 62, two rotary DIP switches 64 mounted on the driver board 62, and the control box 4. The LED substrate 61 is attached to the concave groove 53 in the inside 50 i of the holder 50. Further, the lighting device 1 includes a connector 3 disposed at the other (lower) end of the holder 50. Furthermore, the luminaire 1 includes a plurality of heat release holes 54 formed in the outer cylinder 51 of the holder 50 along the longitudinal direction.

The driver board 62 supplies power and DMX512 signals to the nine LEDs 60 mounted on the LED board 61 via the four cables 63, and performs light emission control such as coloring and luminance. Therefore, a plurality of lighting devices 1 are arranged side by side as the lighting unit 101, these are connected by the link cable 5, and the plurality of lighting devices 1 are linked by the control unit 6, thereby providing a lighting system 100 having a unified effect. Can be used as

The driver board 62 is mounted with a program that can use the lighting device 1 in a stand-alone manner (single unit, not connected to the control unit 6) and a microcomputer chip (CPU) that controls the LED 60 thereby. Yes. Therefore, in this illuminating device 1, by switching to the stand-alone mode with the DIP switch 64, the light emission of the LED 60 can be controlled with an appropriate speed and color pattern. This pattern can be changed by setting the DIP switch 64. For example, by setting the speed and color pattern to each of the two DIP switches 64, light of various colors can be emitted, and furthermore, the color to be emitted can be fixed or looped. Can also be controlled.

The nine LEDs 60 controlled in this way correspond to three colors of LED 60R (red), LED 60G (green) and LED 60B (blue). Note that the number of LEDs 60 that emit each color of R, G, and B can be selected based on the color balance. The LED substrate 61 has the same size as the diameter (diameter) of the holder 50. The LED board 61 of this example has a disk shape of about 25 to 40 mm, and eight LEDs 60 are mounted side by side on the same circumference so as to surround one LED 60 mounted almost at the center. In addition to the three primary colors of R, G, and B, LEDs of other colors may be included, and two-color LEDs may be arranged.

FIG. 5 shows the illumination cover 10 as viewed from each direction. 5A is a front view, FIG. 5B is a plan view, FIG. 5C is a bottom view, and FIG. 5D is a dd end view. An example of the size of the lighting cover 10 of this example is that the diameter (diameter) is about 30-50 mm, and the average diameter (diameter) of the small cavity 40 is about 1-5 mm. The average diameter (diameter) of the small cavities 40 is preferably about 2-5 mm. The size of the small cavity 40 is preferably about 1/50 to 1/5 of the diameter, which is the main size of the lighting cover 10, for example. The size of the small cavity 40 is more preferably about 1/30 to 1/10 of the diameter, which is the main size of the lighting cover 10. The size of the small cavity 40 is more preferably about 1/20 to 1/10 of the diameter which is the main size of the lighting cover 10. An example of the size of the holder 50 is a diameter (diameter) of about 25-40 mm and a height of about 85-95 mm. In addition, each said value is an example, and the size of the illumination cover 10 and the holder 50 is not limited above. The same applies to the following.

Some of the plurality of small cavities 40 are arranged so as to be concentrated on the columnar portion 30 side (downward) of the upper portion 20a. Further, a part of the plurality of small cavities 40 forms a dome-shaped cavity dense region 41 having a shape similar to the upper portion 20a. Furthermore, the other part of the plurality of small cavities 40 is arranged with the same density over the entire area of the columnar part 30. Each of the plurality of small cavities 40 is adjacent to each other at an interval narrower than the average diameter of the small cavities 40, and is multiplexed (multilayered) by overlapping each other or by partly merging. For this reason, in this illumination cover 10, the light introduction part 31 is not observed directly from the surface 21 from which light is emitted.

The density of the plurality of small cavities 40 is higher in the light introducing portion 31 than in the surface 21. The plurality of small cavities 40 are arranged so as to avoid the surface 21. For this reason, the illumination cover 10 includes a transparent region (transparent layer) 42 in which the density of the small cavities 40 is low or absent along the surface 21 so as to surround the cavity dense region 41. The entire transparent region 42 is translucent and the small cavity 40 does not exist. For this reason, the illumination cover 10 is unlikely to reflect or refract light in the transparent region 42.

A part of the plurality of small cavities 40 appears on the bottom surface 32 of the columnar portion 30, and some of the small cavities 40 appear to have a concave shape. For this reason, in this illumination cover 10, the direction of the light which penetrate | invaded the light introduction part 31 with the concave small cavity 40 can be bent in various directions.

As shown in FIGS. 3 to 5, in this illumination cover 10, when viewed from the dome-shaped surface 21, the light introducing portion 31 is covered by the plurality of small cavities 40 from the surface 21 so that it is not directly observed. It has become. For this reason, conversely, the light that has entered the illumination cover 10 from the LED 60 via the light introducing portion 31 does not directly reach the surface 21 but is scattered by the small cavity 40 and then released from the surface 21. The Therefore, the glare of the LED 60 can be reduced with respect to the user (viewer) who views the lighting device 1.

Furthermore, the light of a plurality of colors of the LED 60 introduced from the light introduction part 31 to the illumination cover 10 is reflected or refracted by the surface (boundary surface) of a large number of small cavities 40, so that the direction of the light varies. In addition, the color is further dispersed, and the color and the direction of light are not completely uniformed. Accordingly, light beams of various colors are emitted in various directions. For this reason, the illumination cover 10 having both the anti-glare effect and the function of emitting light of various colors and the illumination device 1 equipped with the illumination cover 10 can be provided.

Furthermore, in this illumination device 1, since the plurality of small cavities 40 overlap with each other, the light introduced from the light introducing portion 31 by the plurality of small cavities 40 is diffusely reflected and reaches the surface 21. Therefore, the plurality of small cavities 40 built in the illumination cover 10 appear as the source of diffuse reflection or the center of the light output from the surface 21. For this reason, a plurality of small cavities 40, in particular, a plurality of small cavities 40 visible from the surface 21, appear to shine. Therefore, the illuminating device 1 which exhibits a peculiar beauty can be provided. Further, the arrangement of the small cavities 40 and the angles and colors of the light entering from the LEDs 60 are different from each other. Furthermore, since these elements have a certain degree of randomness, the color and light output from the illumination cover 10 are different. The direction is beyond prediction, and the lighting device 1 having a new visual effect can be provided. By changing the randomness by the control unit 6, the randomness can be changed randomly in the time direction. In addition, with respect to individual lighting devices 1 having randomness, the control unit 6 is used to control the timing and pattern of light emission and color development of the plurality of lighting devices 1 so that temporal variations are unified. An illumination system 100 can be provided.

Furthermore, in this cover 10, since the LED 60 is covered and hidden from the surface 21 by a plurality of small cavities 40 built in the interior 10i, the LED 60 cannot be seen when viewed with general lighting or sunlight in the room, It looks like a bubble ball, and the light incident from the surface 21 is also refracted and color-dispersed and emitted, so that it can be used as an interior in which rainbow-colored bubbles can be observed.

Furthermore, the illumination cover 10 of the illumination device 1 includes a transparent region 42 provided along the surface 21 outside the cavity dense region 41. For this reason, in this illumination cover 10, it is easy to provide the aesthetics as if a plurality of brilliant small cavities 40 are floating in a clear space that emphasizes transparency.

FIG. 6 shows a cross-sectional view of an outline of a different lighting device 1a. FIG. 7 shows the illumination cover 10a of the illumination device 1a as viewed from each direction. FIG. 7A is a front view and FIG. 7B is a bottom view.

As shown in FIG. 6, the lighting device 1 a also includes a holder 50 that houses nine LEDs 60, and a lighting cover 10 a that is attached to the holder 50 so that the light introduction part 31 faces each LED 60. The lower portion 20b of the lighting cover 10a includes a columnar portion 30 in which a part (center portion) 20x below the upper portion 20a surrounded by the bottom surface 22 protrudes in a columnar shape with respect to the bottom surface 22, and a lower end surface of the columnar portion 30 Includes a condensing part 35 protruding in a truncated cone shape. The condensing part 35 is formed in the bottom 20y of the lower part 20b used as the light introducing | transducing part 31, and was equipped with the function (condensing function) which collects the light irradiated from each LED60 in the center (center) 10x of the illumination cover 10a. Convex shape part 11 is included. Since other configurations are the same as those in the above-described embodiment, common reference numerals are used and description thereof is omitted. The same applies to the following.

As shown in FIGS. 6 and 7, the convex portion 11 of the light collecting portion 35 includes a flat bottom surface 35 a and a slope 35 b that connects the bottom surface 35 a and the columnar portion 30. In the illumination cover 10a of this example, the small cavities 40 do not appear on the bottom surface 35a and the inclined surface 35b, but even if some of the small cavities 40 appear on the bottom surface 35a and / or the inclined surface 35b so as to have a concave shape. Good.

The bottom surface 22 of the upper part 20a is matted in the same manner as the lighting cover 10, and the bottom surface 35a and the inclined surface 35b of the light collecting part 35 are mirror-finished by hanging a buff. In the illumination cover 10a of this example, the bottom surface 35a and the inclined surface 35b of the convex portion 11 form the light introducing portion 31, and the light emitted from each LED 60 passes through the convex portion 11 to the inside of the illumination cover 10a. 10i and is focused on the center 10x of the illumination cover 10a.

In the illumination device 1a of the present example, the illumination cover 10a has a light collecting portion 35 including the convex portion 11. For this reason, it is easy to collect the light incident from the condensing part 35 toward the center 10x of the illumination cover 10a, and light can be prevented from leaking through the bottom surface 22 of the upper part 20a. Therefore, the plurality of small cavities 40 can be illuminated more brightly, and the visual effect can be easily improved. Furthermore, in this illuminating device 1a, when light leaks out through the bottom face 22, it can suppress making a user recognize the glare of the light formed in the ring shape (ring shape).

FIG. 8 shows a further different illumination cover 10b as viewed from each direction. FIG. 8A is a sectional view, and FIG. 8B is a bottom view. The lower part 20b of the illumination cover 10a has a condensing part 35 in which a part (center part) 20x below the upper part 20a surrounded by the bottom face 22 protrudes in a zigzag (sawtooth wave) shape concentrically with respect to the bottom face 22. Including. The condensing part 35 is formed in the bottom part 20y of the lower part 20b used as the light introduction part 31, and contains the Fresnel-shaped part 11 provided with the condensing function which collects light in the center 10x vicinity of the illumination cover 10b. In this example, the columnar part 30 is omitted, and the illumination cover 10b with improved light collecting performance can be provided at low cost.

The Fresnel-shaped part 11 of the condensing part 35 is arranged concentrically around the first peak part 11a protruding in a hemispherical shape (dome shape) with respect to the bottom surface 22 and the first peak part 11a. The second peak portion 11b protruding into a half-spherical shape (semi-conical shape), and the first peak portion 11a and the second peak portion so as to be sandwiched between the first peak portion 11a and the second peak portion 11b. And a trough part (groove part) 11c formed at the skirt (ridge) of the peak part 11b. The first peak portion 11a includes a convex (dome-shaped) bottom surface 11x. The second peak portion 11 b includes a semi-convex (half-dome-shaped) bottom surface 11 y and a wall surface 11 z that connects the top of the bottom surface 11 y and the trough portion 11 c perpendicularly to the contact surface 22. In the illumination cover 10b of this example, the bottom surfaces 11x and 11y and the wall surface 11z of the Fresnel shape part 11 form the light introduction part 31, and the light is condensed on the center 10x of the illumination cover 10b via the Fresnel shape part 11. .

FIG. 9 is a perspective view showing an outline of yet another illumination device 1c. FIG. 10 is a perspective view of the illuminating device 1c, which is developed on main parts constituting the illuminating device 1c.

The lighting device 1 c includes a cylindrical holder 50, a cylindrical socket 70 attached to the holder 50, and a dome-shaped lighting cover 10 c attached to the holder 50 via the socket 70. The holder 50 has the same shape (size) as the holder 50 of the lighting device 1, but the lighting cover 10 c has a larger shape (size) than the lighting cover 10 of the lighting device 1.

The lighting cover 10 c has the columnar part 30 fitted into the upper opening 71 of the socket 70 from the inside (attached and attached), and the lower opening 72 of the socket 70 is attached to the outer peripheral edge 55 a of the upper surface 55 of the holder 50. Can be set easily and detachably. An example of the size of the illumination cover 10c has a diameter (diameter) of about 60-80 mm. The average diameter (diameter) of the small cavities 40 is preferably about 1-8 mm. For example, the size of the small cavities 40 is about 1/50 to 1/5 of the diameter that is the main size of the lighting cover 10c, more preferably 1 / mm. It is 30 to 1/10, more preferably 1/20 to 1/10.

27 LEDs 60 are accommodated in the holder 50 and the socket 70, and each of the 27 LEDs 60 corresponds to three colors of LED 60R (red), LED 60G (green), and LED 60B (blue). ing. A plurality of vent holes 74 for heat dissipation are also provided on the side surface 73 of the socket 70. An example of the size of the socket 70 is a diameter (diameter) of about 55-70 mm and a height of about 10-20 mm. When a lighting cover having a diameter (diameter) smaller than 30 mm is attached, it is preferable to reduce the size of the socket 70 in accordance with the size of the lighting cover.

In this lighting device 1c, the number of LEDs 60 is increased as compared with the

lighting devices

1 and 1a, and more various expressions are possible. Further, in this lighting device 1 c, the lighting cover 10 c is attached to the holder 50 via the socket 70, so that the shape of the holder 50 and the shape of the LED board 61 and the driver board 62 set in the holder 50 are reduced. Standards can be unified. Therefore, it is easy to change the number of LEDs 60 and the size of the illumination cover according to the situation in which the illumination device is used, and the illumination device capable of more various expressions can be provided at a low cost by a simple configuration that is attached via the socket 70. .

FIG. 11 is a cross-sectional view showing an outline of yet another illumination device 1d. FIG. 12 shows the illumination cover 10d of the illumination device 1d as viewed from each direction. FIG. 12A is a front view, and FIG. 12B is a bottom view.

As illustrated in FIG. 11, the lighting device 1 d also includes a holder 50 that houses 27 LEDs 60, a socket 70 that is attached to the holder 50, and a lighting cover 10 d that is attached to the holder 50 via the socket 70. . The lower portion 20b of the illumination cover 10d includes a condensing portion 35 in which a lower part (center portion) 20x of the upper portion 20a surrounded by the bottom surface 22 protrudes in a truncated cone shape with respect to the bottom surface 22, and the periphery of the bottom surface 22 (Outer peripheral edge) 22a includes a protruding portion 22b protruding into a half-spherical shape (semi-conical shape). The condensing part 35 is formed on the bottom part 20y of the lower part 20b to be the light introducing part 31, and includes a convex part 11 having a condensing function for collecting the light emitted from each LED 60 at the center 10x of the illumination cover 10a. . In the illumination cover 10 d of this example, the protrusion 22 b is fitted into the side surface 73 of the socket 70 from the outside (attached and attached), and the lower opening 72 of the socket 70 is placed on the outer peripheral edge 55 a of the upper surface 55 of the holder 50. By attaching it, it can be set easily and detachably. The LED substrate 61 is set (placed) on the upper surface 55 of the holder 50.

FIG. 13 shows different illumination covers 10e as seen from each direction. FIG. 13A is a cross-sectional view, and FIG. 13B is a bottom view. FIG. 14 shows still another illumination cover 10f as seen from each direction. 14A is a cross-sectional view, and FIG. 14B is a bottom view.

The lower portions 20b of these illumination covers 10e and 10f also have a condensing shape in which a part (center portion) 20x below the upper portion 20a surrounded by the bottom surface 22 protrudes in a zigzag shape (sawtooth shape) concentrically with the bottom surface 22. Part 35 is included. These light condensing portions 35 are also formed on the bottom portion 20y of the lower portion 20b serving as the light introducing portion 31, and the Fresnel-shaped portion 11 having a light condensing function for collecting the light emitted from each LED 60 at the center 10x of the illumination cover 10e. including. Since other configurations are the same as those in the above-described embodiment, common reference numerals are used and description thereof is omitted.

FIG. 15 is a cross-sectional view showing an outline of yet another illumination device 1g. FIG. 15B is a bb cross-sectional view of FIG. The lighting device 1g is a metal-made cylindrical cap (screw cap) 50g, and a dome-shaped lighting cover attached so that the light introducing portion 31 faces nine full-color LEDs 65 housed in the screw cap 50g. 10g.

The lighting cover 10g includes a cap receiving portion 22c having a shape in which the protruding portion 22b of the lighting cover 10e further extends and the outer side surface 22d is threaded. The screw cap 50g is attached to the outer side surface 22d of the cap receiving portion 22c. An LED substrate 61 is disposed inside the screw cap 50g, and a chip-type full-color LED 65 is surface-mounted so as to face the bottom 20y of the lower portion 20b of the illumination cover 10g. The illumination device 1g of this example can be used by being suspended on the ceiling surface 9a of the stage 9 or the like by a cable 66 electrically connected to the LED substrate 61.

FIG. 16 is a cross-sectional view showing an outline of yet another lighting device 1h. The illumination device 1h has a spherical outer shape as a whole. The illuminating device 1h includes a dome-shaped illumination cover 10h that is attached so that the light introducing portion 31 faces a metal-made dome-shaped cap (decorative cap) 50h and nine full-color LEDs 65 housed in the cosmetic cap 50h. Including.

The lighting cover 10h includes a flat bottom surface 22 of the upper portion 20a, and a protruding portion 22b projecting into a shape (semi-conical shape) in which the periphery (outer peripheral edge) 22a of the bottom surface 22 is halved. In the illumination cover 10h of this example, the flat bottom surface 22 of the upper portion 20a forms the light introducing portion 31. The makeup cap 50h is attached so as to cover the outer side surface 22e of the protrusion 22b of the lighting cover 10h.

Claims

A lighting cover attached to a holder containing a plurality of light emitting elements so that a light introduction portion faces the plurality of light emitting elements,
The lighting cover is formed of a translucent material,
A surface from which light from the light introducing portion is emitted to the outside;
A lighting cover having a plurality of small cavities that overlap each other between the surface and the light introduction part and are formed so as to cover the light introduction part from the surface.
In claim 1,
The said illumination cover is an illumination cover in which the said light introduction part has a condensing part which condenses the light from these light emitting elements toward the center of the said illumination cover.
In claim 2,
The condensing part is a lighting cover including a convex shape or a Fresnel shape.
In any of claims 1 to 3,
The lighting cover in which the density of the plurality of small cavities is higher in the light introducing portion than in the surface.
In any of claims 1 to 4,
The plurality of small cavities are arranged so as to avoid the surface, and the lighting cover includes a transparent layer having a low density of the plurality of small cavities along the surface.
In any of claims 1 to 5,
The lighting cover includes an upper portion including the convex or spherical surface,
A lighting cover having a lower part including a bottom part forming the light introducing part.
In claim 6,
The lower part has a columnar part in which a part of the lower side of the upper part protrudes in a columnar shape with respect to the bottom surface of the upper part,
A lighting cover in which at least the plurality of small cavities are formed in the upper columnar part side and the columnar part.
In claim 6 or 7,
The lighting cover in which a part of the plurality of small cavities appears at the bottom of the lower part.
In any of claims 6 to 8,
The lighting cover, wherein a part of the plurality of small cavities is formed in a concave shape at the bottom of the lower part.
In any of claims 6 to 9,
The upper cover includes a matte contact surface that contacts the holder.
A lighting cover according to any one of claims 1 to 10,
An illumination device comprising the holder to which the illumination cover is attached.
An illumination unit including a plurality of illumination devices according to claim 11;
And a control unit that controls color development of each of the plurality of illumination devices of the illumination unit.