JP2012043543A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to effectively irradiate light with little color unevenness in accordance with an irradiated object.SOLUTION: In the lighting system provided with multi-color light-emitting diodes 13a, 13b, 13c, 13d each consisting of LED chips r, g, b, w of a plurality of different emission colors, and a first lens 14 as well as a second lens 23 mixing light by the multi-color light-emitting diodes, the lenses are so formed that dispersion degrees of light in a longitudinal and a lateral direction are to be different, and that, are structured to be able to rotate with a light axis as a center.

Description

  The present invention relates to a lighting device suitable as a wall washer, a spotlight, or the like.

As a lighting device that irradiates a wall surface with a lot of light, there is a type of lighting fixture called a wall washer (see, for example, Patent Document 1). In addition, there is a spotlight as an illumination device that illuminates a specific range (spot) in a concentrated manner in order to attract the attention of a spectator in a theater or the like.
Conventionally, halogen lamps have often been used as the light source of these lighting devices, but in recent years, LEDs are being used due to demands for long life and energy saving. In particular, in an illumination device using a multicolor light emitting diode (including a full color light emitting diode) composed of a plurality of LED chips of different emission colors as light sources, various colors can be created by changing the output of each LED chip. It is also possible to change the color temperature and color.

However, multicolor light emitting diodes generally have a structure in which LED chips such as R (red), G (green), and B (blue) are contained in one package and the whole is resin-molded (for example, Patent Documents). Therefore, for example, even when trying to emit white light by mixing the RGB light, the light may not be well mixed and may appear to be split into R, G, and B. Then, due to the above-described splitting of the emission color, there is a risk that color unevenness occurs in the light irradiated to the irradiation target.
In particular, in a spotlight, in order to effectively irradiate a specific range (spot) with light emitted from a light source, it is preferable to use an aperture with a hole as small as possible to make light with less diffusion, but less diffusion. And light mixing becomes insufficient, and color unevenness is likely to occur. Therefore, it is possible to add a lens for mixing, but it is not efficient.
In addition, when the object to be irradiated is vertically long or horizontally long, such as when illuminating a picture displayed in a museum, light with less color unevenness is efficiently irradiated along the longitudinal direction of the object to be irradiated. Therefore, it is desired to be able to change the degree of diffusion of light in the vertical and horizontal directions according to the irradiation object.

JP-A-8-7629 JP 2008-47809 A

  This invention makes it an example of a subject to cope with such a problem. That is, it is an object of the present invention to be able to effectively irradiate light with little color unevenness according to the irradiation object.

  In order to achieve such an object, the technical means according to the present invention includes at least the following configuration.

  A lighting device comprising a multicolor light emitting diode comprising a plurality of LED chips of different light emission colors and a lens for mixing light from the multicolor light emitting diode, wherein the lens is in the vertical and horizontal directions. It is characterized in that it is formed so as to have different degrees of light diffusion and is rotatable about the optical axis.

By having such characteristics, the present invention has the following effects.
In addition to being able to irradiate light with less color unevenness with different degrees of diffusion of light in the vertical and horizontal directions, the direction of increasing the degree of diffusion can be easily changed by adjusting the rotational position of the lens, As a result, light with little color unevenness can be effectively irradiated according to the irradiation object.

It is a side view which shows an example of the illuminating device which concerns on this invention. It is a longitudinal cross-sectional view which shows the lamp body of the illumination device. It is the (III)-(III) sectional view taken on the line in FIG. It is a front view which shows an example of a frame-shaped spring member. It is the (V)-(V) sectional view taken on the line in FIG. It is a top view which shows the front side of a 1st lens. It is a side view of the 1st lens. It is a top view which shows the front side of a 2nd lens. It is a principal part enlarged view of FIG. It is a bottom view of the 2nd lens. It is the (XI)-(XI) sectional view taken on the line of FIG. It is the (XII)-(XII) sectional view taken on the line of FIG. It is a top view which shows the Example of the board | substrate which mounted | wore with four multicolor light emitting diodes. It is a top view which shows the Example of the board | substrate which mounted | wore with three multicolor light emitting diodes. It is a top view which shows the comparative example of the board | substrate which mounted | wore with four multicolor light emitting diodes. It is a figure which shows typically the light irradiated to the wall surface, (a) is based on the Example of FIG. 13, (b) is based on the comparative example of FIG.

One mode for carrying out the present invention is a lighting device comprising a multicolor light emitting diode comprising a plurality of LED chips of different light emitting colors and a lens for mixing light from the multicolor light emitting diode. The lens is formed so that the diffusion degree of light in the vertical and horizontal directions is different, and is configured to be rotatable about the optical axis.
According to this configuration, light emitted from a plurality of LED chips having different emission colors is mixed by the lens. Since the lens is formed so that the diffusion degree of light is different between the vertical direction and the horizontal direction and is configured to be rotatable, if the rotation position of the lens is adjusted, the color can be changed according to the shape of the irradiation object. Light with less unevenness can be efficiently irradiated.

In a more preferred embodiment, the lens includes a plurality of the multicolor light emitting diodes, and the lens condenses and diffuses the light from the plurality of multicolor light emitting diodes for each multicolor light emitting diode; A second lens for diffusing light emitted from the lens, wherein the second lens is formed so that the diffusion degree of the light in the vertical direction and the horizontal direction is different, and the optical axis is the center. It is provided so that it can rotate.
According to this configuration, it is possible to efficiently irradiate forward by condensing light from a plurality of multicolor light emitting diodes, and it is possible to effectively reduce color unevenness by two-stage diffusion.

In a more preferred embodiment, the hood is provided with a hood that covers the front of the second lens in a substantially cylindrical shape, and the hood has a shape in which a front end portion is obliquely cut, and is provided to be rotatable around an optical axis. .
According to this configuration, the obliquely cut shape hood can irradiate light only in the necessary direction, and the irradiation direction can be changed by rotating the hood. Can be effectively irradiated according to the irradiation object.

In a more preferred form, the front cylinder having the second lens and the hood connected to the rear cylinder having the multicolor light emitting diode and the first lens, the front cylinder The part is connected to the rear cylinder part so as to be detachable, the hood overlaid around the connection cylinder part, and the rotation provided on the front end side in the connection cylinder part. A second lens and a frame-like spring member provided on the rear side of the second lens in the coupling cylinder, and bent inward at the front end of the coupling cylinder to An inward edge that contacts the lens 2 from the front side is provided, and an annular groove that is continuous over the entire circumference is formed on the inner circumferential surface of the hood, and the frame-like spring member is a part of the outer circumference. And other parts facing the part, By penetrating through the coupling cylinder part and loosely fitting into the annular groove, the second lens is elastically pressed from the rear side by being locked by the coupling cylinder part, and the hood can be rotated. Moreover, it is held immovable in the front-rear direction.
According to this structure, the structure which rotates a 2nd lens and a hood according to an irradiation target object is realizable by a simple structure with favorable productivity.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an example of a lighting device according to the present invention.

  The lighting device A includes a control circuit unit 1 and a lamp body 2 connected to a side surface of the control circuit unit 1, and an upper end portion of the control circuit unit 1 is attached to a ceiling surface or the like.

  The control circuit unit 1 includes a power supply circuit and a control circuit (not shown) in a substantially rectangular case 1a, and controls power supplied from a ceiling surface or the like to supply to a plurality of multicolor light emitting diodes described later. .

  The lamp body 2 includes a rear tube portion 10 connected to the side surface of the control circuit portion 1 so as to rotate about a horizontal axis, and a front tube portion 20 connected to the front side of the rear tube portion 10. .

  The rear cylinder part 10 is emitted from the main body part 11, the heat sink part 12 connected to the rear end side of the main body part 11, the LED board 13 provided as a light source in the main body part 11, and the LED board 13. And a first lens 14 that collects and diffuses the light.

The main body portion 11 is a cylindrical member made of a metal material, and has a groove 11a for connecting a front cylindrical portion 20 described later to the inner peripheral surface on the front end side thereof. According to the illustrated example, the groove 11 a is provided over the entire inner peripheral surface of the main body 11, but may be provided only on the lower end side.
In addition, a cutout portion 11b is formed at the upper portion on the front end side of the main body portion 11 so as to be fitted from the rear side with respect to the connection screw 26 screwed into the front cylinder portion 20.

The heat sink 12 is connected and fixed to the rear end opening of the main body 11.
The heat sink portion 12 is formed in a pleat shape so as to dissipate heat from the LED substrate 13.

Further, an LED substrate 13 is provided on the rear end side in the main body portion 11 so as to be in contact with the front end surface of the heat sink portion 12.
The LED board 13 is a disk-shaped printed board, and a plurality of (four in the example shown in FIG. 13) multicolor light emitting diodes 13a, 13b, 13c, and 13d are mounted on the surface thereof.

Each multi-color light emitting diode 13a (13b, 13c, or 13d) has LED chips r, g, b, and w of a plurality of light emitting colors (four colors of red, green, blue, and white according to the illustrated example) in the same circle. Provided at equal intervals on the circumference (see FIG. 13), and provided on the front side of these LED chips with a condensing lens that directs the light emitted from these LED chips forward so that power can be supplied to each LED chip It is configured.
Therefore, according to the multi-color light emitting diode 13a (13b, 13c, or 13d), when a plurality of light emitting LED chips are simultaneously emitted, the output of each LED chip is appropriately adjusted, thereby It is possible to emit light of various colors obtained by synthesizing the light of the chip. Furthermore, when emitting white light, it is possible to change the color temperature or add a subtle color.
The multicolor light emitting diode 13a (13b, 13c, or 13d) uses “Xlamp (registered trademark) MC-E LED Color Neutral White manufactured by CREE INC., USA” according to an example of the present embodiment. As long as the structure is the same, a multicolor light emitting diode or a full color light emitting diode of another manufacturer may be used.

Each of the plurality of multicolor light emitting diodes (for example, 13b) is arranged so that the LED chips of the same light emitting color do not overlap each other when overlaid on the other multicolor light emitting diodes (13a). The multi-color light emitting diode (13a) is in a positional relationship rotated by a predetermined angle.
In other words, when each multicolor light emitting diode (for example, 13b) is superimposed on another multicolor light emitting diode (for example, 13a) by parallel movement without rotating, the LED chips of the same color overlap each other. In order to prevent this, the other multicolor light emitting diode (13a) is provided in a positional relationship that rotates by a predetermined angle.
In particular, the preferred example shown in FIG. 13 is configured such that when each multicolor light emitting diode is overlaid on another multicolor light emitting diode as described above, LED chips of different light emitting colors overlap each other. The

The illustrated example will be described in more detail. The plurality of multicolor light emitting diodes are arranged at equal intervals on the same circumference, and each multicolor light emitting diode is It is in a positional relationship of rotating at (360 / n) degrees.
That is, according to the example shown in FIG. 13, four multicolor light emitting diodes 13a, 13b, 13c, and 13d are provided at equal intervals on the same circumference, and each multicolor light emitting diode (for example, 13b) is adjacent to each other. With respect to the color light emitting diode (13a), it is in a positional relationship rotated 90 degrees clockwise.

  A first lens 14 and a second lens 23, which will be described later, are provided on the front side of the LED substrate 13 as lenses for mixing light from the plurality of multicolor light emitting diodes.

The first lens 14 is configured to collect and diffuse the light from the plurality of multicolor light emitting diodes 13a, 13b, 13c, and 13d for each multicolor light emitting diode.
More specifically, the first lens 14 includes a plurality of (four in the illustrated example) condensing / diffusing lenses 14a that condense and diffuse the light of each multicolor light emitting diode.

As shown in FIGS. 6 to 7, each condensing diffusion lens 14 a has a substantially inverted conical shape that gradually increases in diameter toward the front, and has a cylindrical concave portion 14 a 1 at the rear end portion thereof. Has a substantially hemispherical convex portion 14a2 projecting rearward on the bottom (upper portion in the illustrated example) side. The light emitting portion of the multicolor light emitting diode 13a (13b, 13c or 13d) is inserted into the recess 14a1.
A large number of fine irregularities 14a4 for diffusing and radiating light are formed on the front surface of the condensing diffusion lens 14a.

According to the condensing and diffusing lens 14a, light incident on the inner peripheral wall of the concave portion 14a1 among the light of the multi-color light emitting diode 13a (13b, 13c or 13d) emitted in the concave portion 14a1 is refracted by the inner peripheral wall. Thereafter, the light is totally reflected by the inclined inner surface 14a3 of the outer peripheral portion, travels substantially forward, and is diffused and emitted by the front surface unevenness 14a4.
Further, the light incident on the convex portion 14a2 is refracted on the surface of the convex portion 14a2, travels substantially forward, and is diffused and emitted by the concave and convex portions 14a4 on the front surface.

  Each condensing diffusion lens 14a may be a combination of a lens other than the illustrated example or a plurality of lenses as long as the same function and effect can be obtained.

  A plurality of the condensing and diffusing lenses 14a are arranged at equal intervals on the same circumference so as to correspond to each of the plurality of multicolor light emitting diodes 13a, 13b, 13c, and 13d, and are arranged on the front and rear lens holding members 14a5 and 14a6. It is held in an integrated manner so as to be sandwiched (see FIG. 2).

The front lens holding member 14a5 is provided with a plurality of through holes 14a51 through which light emitted from the respective condensing / diffusing lenses 14a is passed through a metal disk (see FIG. 3).
The rear lens holding member 14a6 is formed by providing a plurality of through-holes in contact with the inverted conical outer peripheral surface of each condensing diffusion lens 14a in a metal disk.
These front and rear lens holding members 14a5 and 14a6 are connected by a columnar connecting member 14b and a screw 14c with a plurality of condensing diffusion lenses 14a sandwiched from the front and rear.
Further, the lens holding member 14a5 is connected to the heat sink portion 12 while the LED substrate 13 is in contact with the heat sink portion 12 by a columnar connecting member 14d. More specifically, the lens holding member 14a5 is fixed to one end side (the left end side according to FIG. 2) of the connecting member 14d by the screw 14e. A screw portion (not shown) is provided on the other end side (right end side according to FIG. 2) of the connecting member 14d, and the screw portion penetrates the LED board 13 and is screwed to the heat sink portion 12.

In addition, a light shielding plate 14a7 is provided on the front side of the first lens 14 so as to be positioned between the front surface of the condensing / diffusing lens 14a and the joint between the front and rear tube portions 10 and 20.
The light-shielding plate 14a7 is an annular disc that substantially surrounds the plurality of condensing diffusion lenses 14a and whose outer periphery is close to the inner peripheral surface of the rear cylinder portion 10, and is provided with a lens holding member 14a5 by a columnar connecting member 14a8 and a screw 14a9. It is connected to.
According to the light shielding plate 14 a 7, it is possible to prevent light emitted from the first lens 14 from leaking from the gap between the front cylinder part 20 and the rear cylinder part 10.

  The front cylinder part 20 is superposed on the periphery of the coupling cylinder part 21 so as to be detachably connected to the main body part 11 of the rear cylinder part 10, and is overlapped with the optical axis (second lens 23). Hood 22 rotatable around the center line), a second lens 23 provided on the front end side in the coupling cylinder portion 21 so as to be rotatable around the optical axis, and a second lens 23 in the coupling cylinder portion 21. A front frame-like spring member 24 provided on the rear side of the second lens 23 and a rear frame-like spring member 25 provided on the rear end side in the coupling cylinder portion 21.

  The coupling cylinder part 21 is formed in a polygonal cylindrical shape so as to have a slight gap between the inner cylindrical surface of the cylindrical hood 22. A circular hole 21b through which light emitted from the second lens 23 passes and an edge portion 21a of the hole 21b are provided at the front end portion of the coupling cylinder portion 21 that forms the bottom of the polygon. The part 21a is in contact with the second lens 23 from the front side.

The hood 22 has a substantially cylindrical shape whose front end is obliquely cut, and an annular groove 22a for fitting a front frame-like spring member 24, which will be described later, is formed on the inner peripheral surface so as to be continuous over the entire circumference. Is done.
The rear end edge portion of the hood 22 is reduced in a stepped shape, and has some play so as to be rotatable with respect to the stepped diameter-expanded portion of the front end of the rear cylinder portion 10. It is fitted.

The entire shape of the second lens 23 is formed in a substantially disc shape, and has an uneven portion 23a and an uneven portion 23b on the front surface and the rear surface, respectively.
More specifically, the front surface of the second lens 23 is formed in a substantially flat shape as a whole, and a large number of fine pyramid-shaped concave portions (see FIG. 9) are arranged on the flat surface. The concavo-convex portion 23a is formed.
Further, the rear end surface of the second lens 23 is generally concave in the shape of a concave lens, and the concave surface has a plurality of rows of corrugated portions 23b. Each concave portion forming the concave-convex portion 23b has a concave cross-sectional shape continuous in one direction. Furthermore, many fine unevenness | corrugations (not shown) are provided in the surface of the uneven | corrugated | grooved part 23b.
According to the second lens 23, light incident from the rear surface (upper surface according to FIG. 11) side is diffused by passing through the front and rear uneven portions 23b and 23a, and is emitted from the front surface. In this case, the degree of diffusion is larger in the direction orthogonal to the direction (horizontal direction in FIG. 10) than in the direction in which the rear surface uneven portion 23b continues (up and down direction in FIG. 10).
The second lens 23 can be replaced with one having a configuration other than the illustrated example as long as the same effect can be obtained.

  The second lens 23 having the above-described configuration has a slight gap between the coupling cylinder portion 21 and the inner peripheral surface of the coupling cylinder portion 21 so that the second lens 23 can rotate around the optical axis in the coupling cylinder portion 21. 21 on the front end side. The second lens 23 is elastically pressed from the rear side by the front frame-like spring member 24 in a state where the second lens 23 is in contact with the inward edge portion 21a of the front end of the coupling cylinder portion 21 (see FIG. 2).

  The front frame-shaped spring member 24 has a part in the outer peripheral part (upper end part according to the example shown in FIG. 2) and another part (lower end part according to the example shown in FIG. 2) facing the part. Each is penetrated through the coupling cylinder part 21 and is loosely fitted into the annular groove 22a on the inner peripheral surface of the hood 22, thereby being locked to the coupling cylinder part 21 and elastically pressing the second lens 23 from the rear side. At the same time, the hood 22 is held rotatably and immovable in the front-rear direction by the part and the other part.

  More specifically, the front frame-shaped spring member 24 is formed by bending a metallic spring wire into a rectangular frame shape having a cut 24a as shown in FIGS. At the end of the cut 24a, knobs 24b and 24b bent backward are formed. The front frame-shaped spring member 24 has protrusions 24c and 24c that are bent in a square shape when viewed from the side with the cut 24a facing upward (see FIG. 5) and directed forward.

  The front-side frame-like spring member 24 having the above-described configuration is reduced in diameter by inserting the left and right knobs 24 b and 24 b and inserted into the coupling cylinder part 21. Then, the upper end side portions 24d and 24d and the lower end side portion 24e of the front side frame-shaped spring member 24 are respectively inserted into through holes provided in the coupling cylinder portion 21 so that the annular groove 22a of the hood 22 has play. It fits in the state. Therefore, the hood 22 can be rotated around the optical axis with respect to the coupling cylinder portion 21 and the front frame-like spring member 24 and is held so as not to move in the front-rear direction.

  Further, the left and right projecting portions 24 c and 24 c of the front frame-shaped spring member 24 are engaged with through holes provided in the coupling cylinder portion 21, respectively. In this engaged state, the front frame-shaped spring member 24 makes the portion on the protruding portion 24c side abut on the second lens 23 and elastically presses the second lens 23 (see FIG. 2). Therefore, the second lens 23 is held so as not to rattle easily and can be rotated as necessary.

  Further, the rear frame-shaped spring member 25 is formed in a rectangular frame shape having a cut at the upper end of a metal spring wire material, similar to the above-described front frame-shaped spring member 24. The rear frame-shaped spring member 25 has a corner portion on the lower end facing the cut line penetrating through the coupling tube portion 21 and is fitted into the groove 11a on the inner peripheral surface of the rear tube portion 10, so that the other corner side portion is fitted. Is locked to the coupling cylinder portion 21.

  Further, a connecting screw 26 is screwed to the upper end portion of the connecting cylinder portion 21 on the rear end side with respect to the rear frame spring member 25. The neck portion of the connection screw 26 is inserted into and tightened into the notch portion 11b on the upper front side of the rear cylinder portion 10.

Therefore, if the connection screw 26 is loosened and removed from the notch 11b, and the lower end of the rear frame spring member 25 is removed from the groove 11a at the lower end of the rear cylinder 10, the front cylinder 20 is easily removed from the rear cylinder 10. be able to.
On the contrary, when assembling, the lower end portion of the rear frame-like spring member 25 is fitted into the groove 11a at the lower end of the rear tube portion 10, and the connecting screw 26 is fitted into the notch portion 11b and tightened, so that the front tube portion 20 is moved to the rear. It can be easily connected to the tube portion 10.

In the figure, reference numeral 27 denotes a disk-shaped filter, and reference numeral 28 denotes a cover for holding the filter 27. The cover 28 is formed in a frame shape that covers the filter 27, and has an engagement piece 28a protruding rearward at each of the left and right ends. Each engagement piece 28a is provided with an engagement hole 28a1 for engaging with a projection (not shown) on the outer periphery of the coupling cylinder portion 21.
When the cover 28 is attached to the front cylinder part 20, the engagement pieces 28a are inserted into a gap secured between the inner peripheral surface of the hood 22 and the outer peripheral surface of the coupling cylinder part 21, and the engagement holes 28a1 are inserted. May be fitted to a convex part (not shown) of the outer peripheral surface of the coupling cylinder part 21.
Further, when the cover 28 is removed from the front tube portion 20, the left and right engaging pieces 28a, 28a may be elastically bent in the diameter increasing direction to remove the engaging hole 28a1 from the convex portion.

  Next, a characteristic operation effect of the lighting apparatus A of the present embodiment will be described in detail in comparison with a comparative example.

In the comparative example, the LED substrate 13 in the illumination device A having the above configuration is replaced with the LED substrate 113.
The LED substrate 113 of the comparative example has a relationship in which each of the plurality of multicolor light emitting diodes 13a is arranged at the same angle and the LED chips of the same color are overlapped when overlapped with other multicolor light emitting diodes 13a. It was made to become.

According to the illumination device A of the present embodiment, the light emitted from the plurality of multicolor light emitting diodes 13a, 13b, 13c, 13d is first condensed by the first lens 14 and then diffused, and further the first The light is also diffused by the second lens 23 to be emitted in a mixed state. The emitted light becomes light having different diffusion degrees in the vertical direction and the horizontal direction due to the action of the corrugated portion 23b of the second lens 23, and is irradiated onto an irradiation target such as a wall surface.
The irradiated light becomes irradiated light with less color unevenness without disrupting the mixed state of a plurality of emission colors (red, green, blue, and white) (see FIG. 16A).
That is, in the lighting device A of the present embodiment, each multicolor light emitting diode is rotated and arranged so that the LED chips of the same light emission color do not overlap each other with respect to the other multicolor light emitting diodes. A plurality of different emission colors are overlapped and mixed well, and irradiation light with little color unevenness can be obtained.

On the other hand, in the illumination device of the comparative example, a plurality of emission colors (red, green, blue, and white) are split and become irradiation light with many color unevennesses (see FIG. 16B).
That is, in the illumination device of the comparative example, each multicolor light emitting diode is disposed so that the LED chips of the same light emission color overlap each other with respect to the other multicolor light emitting diodes. Are overlapped and emphasized, resulting in irradiation light with many color unevenness. More specifically, a plurality of broadly emitted light colors overlap with each other in the vicinity of the center of the irradiation light, and the color unevenness is relatively small.

  FIGS. 16A and 16B are diagrams schematically illustrating the difference in effect between the illumination device A of the present embodiment and the comparative example in an easy-to-understand manner, and do not indicate actual irradiation light. Of course.

Further, according to the illumination device A of the present embodiment, the direction in which the degree of light diffusion increases can be changed by the rotation of the second lens 23. For example, when illuminating a horizontally long picture, the continuous direction of the concavo-convex portion 23b of the second lens 23 is set to the vertical direction, and the light having a large horizontal diffusion degree shown in FIG. That's fine.
Further, for example, in the case of irradiating a vertically long picture, the second lens 23 is rotated so that the continuous direction of the concavo-convex portion 23b of the second lens 23 is the horizontal direction, and the degree of diffusion in the vertical direction is large. It should be light.

Furthermore, according to the illumination device A of the present embodiment, the obliquely cut hood 22 can irradiate light only in the necessary direction, and the irradiation direction can be changed by the rotation of the hood 22. Can do.
For example, in order to irradiate the wall surface with the emitted light and not to irradiate the floor surface side, the hood 22 is rotated and adjusted with the optical axis facing the wall surface so that the protruding portion of the hood 22 is lowered. It should just become.

  In the above-described embodiment, four multicolor light emitting diodes are provided as an example. However, as another example, an aspect including three multicolor light emitting diodes (see FIG. 14), two multicolor light emitting diodes, or two It is also possible to have an aspect with 5 or more.

  In the present embodiment, as a particularly preferable example, when each of a plurality of multicolor light emitting diodes is superimposed on another multicolor light emitting diode, the LED chips of the same light emission color do not overlap each other. The positional relationship is rotated by a predetermined angle with respect to the other multicolor light emitting diodes, but the effect of reducing color unevenness is that at least one of a plurality of multicolor light emitting diodes is in the positional relationship. Can be obtained by:

  In the present embodiment, each multicolor light emitting diode has four LED chips r, g, b, and w having different emission colors. However, as another example, each multicolor light emitting diode has a light emitting color. It is good also as an aspect which comprises two, three, or five or more different LED chips. As another example, a plurality of types of multicolor light emitting diodes having different numbers of LED chips can be used.

  In the present embodiment, as a particularly preferable aspect, light is diffused in two stages by the first lens 14 and the second lens 23. However, if a similar light mixing effect can be obtained, An embodiment using a single lens or three or more lenses, an embodiment using a reflector, an embodiment using a lens and a reflector, and the like can be used.

Moreover, in the said embodiment, although the wall washer type illuminating device A was comprised as a preferable example, it is also possible to comprise a spotlight as another preferable example.
In the illuminating device configured with the spotlight, the light emitted from the plurality of multicolor light emitting diodes 13a, 13b, 13c, and 13d of the LED substrate 13 having the above-described configuration is condensed by a condenser lens, a reflecting plate, or the like (not shown). In addition, an aperture (not shown) is provided in the vicinity of the collected light. The aperture is a plate having a hole through which one or a plurality of light passes, and is configured to block light at a portion other than the hole. And this illuminating device (spotlight) is comprised so that the light which passed through the said aperture may be made to pass through a 1 or several lens, and to irradiate an irradiation target object (a plane and a solid are included).
According to this illuminating device (spotlight), a plurality of different luminescent colors are satisfactorily overlapped with each other, so that light emitted to a specific range (spot) can be made light with little color unevenness.

1: Control circuit unit 2: Lamp body 10: Rear tube unit 13: LED substrate 13a, 13b, 13c, 13d: Multicolor light emitting diode 14: First lens 14a: Condensing diffusion lens 20: Front tube unit 21: Coupling Tube portion 22: Hood 23: Second lens 24: Front side frame-shaped spring member A: Lighting device r, g, b, w: LED chip

Claims (4)

A lighting device comprising a multicolor light emitting diode comprising a plurality of LED chips of different emission colors, and a lens for mixing light from the multicolor light emitting diode,
The illuminating device according to claim 1, wherein the lens is formed so as to have different diffusion degrees of light in the vertical direction and the horizontal direction, and is configured to be rotatable about the optical axis. A plurality of the multicolor light emitting diodes;
The lens includes a first lens that condenses and diffuses the light from the plurality of multicolor light emitting diodes for each multicolor light emitting diode, and a second lens that diffuses the light emitted from the first lens. The second lens is formed so as to have different degrees of diffusion of light in the vertical direction and the horizontal direction, and is provided so as to be rotatable about the optical axis. The lighting device described. A hood that covers the front of the second lens in a substantially cylindrical shape;
The lighting device according to claim 2, wherein the hood has a shape in which a front end portion is obliquely cut and is rotatable about an optical axis. A lighting device in which a front tube portion having the second lens and the hood is connected to a rear tube portion having the multicolor light emitting diode and the first lens,
The front cylinder part is provided rotatably on the front end side in the coupling cylinder part, the coupling cylinder part detachably connected to the rear cylinder part, the hood superimposed around the coupling cylinder part, and The second lens and a frame-like spring member provided on the rear side of the second lens in the coupling cylinder portion,
An inward edge that is bent inward and contacts the second lens from the front side is provided at the front end of the coupling cylinder portion,
On the inner peripheral surface of the hood, an annular groove that is continuous over the entire circumference is formed,
The frame-like spring member is locked to the coupling cylinder part by allowing a part of the outer peripheral part thereof and another part facing the part to pass through the coupling cylinder part and loosely fit in the annular groove. 4. The lighting device according to claim 3, wherein the second lens is elastically pressed from the rear side, and the hood is held rotatably and immovable in the front-rear direction.

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