JP2011233269A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system capable of suppressing deterioration of the lighting system in which a color tone of illumination light is made changeable.SOLUTION: The lighting system is provided with a light-emitting unit 1 emitting light which energize a phosphor, a dimmer 2 dimming light emitted from the light-emitting unit 1 and transmitting the same, and a light outgoing part 3 provided with wavelength conversion parts 3r, 3g, 3b with the phosphor which absorb the light transmitted by the dimmer 2 and convert into visible light of different wavelengths. The dimmer 2 has a plurality of light translucent parts 2a, 2b, 2c for differentiating each of transmitted light volume of the lights emitted from the light-emitting unit 1, and moreover, the light outgoing part 3 has at least one of the wavelength conversion parts 3r, 3g, 3b arranged corresponding to the plurality of the light translucent parts 2a, 2b, 2c.

Description

  The present invention relates to an illuminating device that changes the color tone of illumination light.

  In recent years, light emission using a solid light emitting element (for example, an LED chip, an LD (laser diode) element, an organic EL element, etc.) capable of emitting red (R), green (G), and blue (B) light with high output. Equipment has been developed. Using a plurality of types of light-emitting devices having different emission colors, for example, red light, green light, and blue light can be emitted, and white light can be obtained by mixing light of the respective emission colors.

  Further, as another light-emitting device, a light-transmitting material containing an LED chip that is a solid-state light-emitting element and a fluorescent material that covers the LED chip and absorbs at least part of light from the LED chip and emits fluorescence that has undergone wavelength conversion A light emitting device including a wavelength conversion member made of a conductive member has also been developed. For example, the light-emitting device including the wavelength conversion member can radiate ultraviolet light emitted from the LED chip as red light, green light, or blue light by converting the wavelength of the ultraviolet light using the wavelength conversion member. A combination of a light emitting device including a wavelength converting member that emits red light, a light emitting device that includes a wavelength converting member that emits green light, and a light emitting device that includes a wavelength converting member that emits blue light produces white light. Can be radiated. Moreover, the light-emitting device provided with the wavelength conversion member can also radiate | emit white light, for example by mixing the blue light from an LED chip, and the yellow light from a wavelength conversion member.

  These light emitting devices are used even for lighting devices as the output of solid state light emitting devices increases. Here, the lighting device may be desired to change the color tone of the illumination light to white light having a desired color temperature. In the lighting device using the above-described light emitting device, the color tone of the illumination light can be made variable by adjusting the light of a plurality of types of light emitting devices having different emission colors.

  For example, as shown in FIG. 8, a light emitting device 110 using only a blue LED chip that emits blue light, a light emitting device 111 having a blue LED chip and a green phosphor that absorbs blue light and emits green light, A light emitting device 112 having a blue LED chip and a red phosphor that absorbs blue light and emits red light, a light emitting device 113 having a blue LED chip and a yellow phosphor that absorbs blue light and emits yellow light, and a green LED There is known an illumination device including a light emitting device 114 that uses only a chip and a control device 120 that controls the light intensity of each of the light emitting devices 110 to 114 (see, for example, Patent Document 1).

  In the illumination device disclosed in Patent Document 1, the amount of current supplied to each of the light emitting devices 110 to 114 having different emission colors is changed, and the light intensity of the different emission colors emitted from each of the light emitting devices 110 to 114 is controlled. The color tone of the illumination light emitted from the apparatus can be made variable.

JP 2007-122950 A

  By the way, each light-emitting device 110-114 of the above-mentioned illuminating device emits light while each light-emitting device 110-114 emits light according to the amount of current supplied to each light-emitting device 110-114. When the amount of current supplied to each of the light emitting devices 110 to 114 is changed to change the color tone of illumination light emitted from the lighting device, the amount of heat generated in each of the light emitting devices 110 to 114 also changes.

  In the illuminating device, every time the color tone of the illumination light is changed, the temperature increase and the temperature decrease are repeated for each of the light emitting devices 110 to 114. The temperature change for each of the light emitting devices 110 to 114 causes thermal stress in each constituent member due to the difference in thermal expansion coefficient between the constituent members constituting the lighting device. As a result, the illuminating device has a large burden of thermal stress accompanying the change in the color tone of the illuminating light, which is a factor that promotes deterioration of the illuminating device. As deterioration of the lighting device, for example, interface peeling between the LED chip and the translucent member that covers the LED chip, such as interface peeling of each constituent member that constitutes the lighting device, and the electrical connection part that feeds power to the LED chip or the light emitting device For example, a connection failure may occur. In the lighting device, there is a risk that deterioration of the lighting device may cause a decrease in light intensity, a change in color tone over time, or a non-lighting.

  In particular, lighting devices are required to use light emitting devices capable of emitting light with higher light intensity in order to improve light output, and the amount of heat generated by each light emitting device tends to increase. As the lighting device increases the light intensity of each light emitting device, there is a risk that the deterioration of the lighting device due to the change in the color tone of the illumination light may become more prominent. There is a need for improvements.

  This invention is made | formed in view of the said reason, The objective is to provide the illuminating device which can suppress deterioration of the illuminating device accompanying changing the color tone of illumination light.

  An illumination device according to the present invention includes a light emitting device that emits light that excites a phosphor, a light control unit that adjusts and transmits light emitted from the light emitting device, and absorbs light transmitted by the light control unit. And a light emitting unit including a wavelength conversion unit having the phosphor that converts the visible light having different wavelengths, and the light control unit includes a plurality of different amounts of transmitted light of the light emitted from the light emitting device. The light emitting unit includes at least one wavelength conversion unit corresponding to the plurality of light transmitting units.

  In this lighting device, the light control unit includes a panel that varies the light intensity of the light transmitted through the light transmission unit by a plurality of the light transmission units, and a center part of the panel. It is preferable to have a rotating shaft that can rotate the panel relative to the wavelength converting portion of the light emitting portion at the center.

  In this lighting device, the light control section includes a plurality of the panels having the same shape, and the light transmitting sections of the plurality of panels are rotated by rotating at least one of the panels around the center section. It is preferable that the ratio of overlapping each other is variable.

  In this illuminating device, it is preferable that the light control unit includes a drive unit that rotates the rotation shaft, and the drive unit can position a relative arrangement of the wavelength conversion unit and the light transmission unit. .

  In this illumination device, the light emitting device includes a plurality of light emitting devices on one surface of a wiring board having a wiring pattern for supplying power to the light emitting device, and is surrounded by a reflecting member that reflects light emitted from the light emitting device as one light source. The light emitted from the light source and reflected by the panel is preferably reflected by the one surface side of the wiring board and the entire panel side by the reflecting member.

  In the illuminating device of this invention, there exists an effect that it becomes possible to suppress deterioration of the illuminating device accompanying changing the color tone of illumination light.

The illuminating device of Embodiment 1 is shown, (a) is principal part explanatory sectional drawing, (b) is explanatory perspective view. It is principle explanatory drawing in the principal part of an illuminating device same as the above. It is explanatory drawing in another illuminating device same as the above. It is a principal part perspective view in the other illuminating device same as the above. It is a principal part schematic plan view in further another illuminating device same as the above. The illuminating device of Embodiment 2 is shown, (a) is principal part explanatory sectional drawing, (b) is explanatory perspective view. It is principal part explanatory sectional drawing of the illuminating device of Embodiment 3. FIG. It is a schematic block diagram which shows the conventional illuminating device.

(Embodiment 1)
Hereinafter, the illuminating device of this embodiment is demonstrated based on FIG. 1 thru | or FIG. 1 to 5, the same members are denoted by the same reference numerals and redundant description is omitted.

  The illuminating device 10 according to the present embodiment includes three light emitting devices 1 each including an LED chip 11 that emits light that excites a phosphor, and dimming that modulates and transmits light emitted from the light emitting device 1. Unit 2 and light emitting unit 3 having three types of wavelength conversion units 3r, 3g, and 3b having the above-described phosphor that absorbs the light transmitted by dimming unit 2 and converts it into visible light having a different wavelength. ing.

  In particular, the light control unit 2 includes a plurality (three in this case) of light transmitting units 2a, 2b, and 2c that vary the amount of transmitted light of the light emitted from the light emitting device 1, and the light emitting unit 3 includes The wavelength converters 3r, 3g, 3b are arranged corresponding to the light transmitting parts 2a, 2b, 2c.

  Here, the light control part 2 has the panel 21 which changes the light intensity of the light which permeate | transmitted this translucent part 2a, 2b, 2c by several translucent part 2a, 2b, 2c according to a place. The light control unit 2 is provided at the center of the panel 21 shown in FIG. 1B, and the panel 21 is used as the wavelength conversion units 3r, 3g, 3b of the light emitting device 1 and the light emitting unit 3 with the center as the center. It has a rotating shaft 23 that can be relatively rotated (see the broken arrow in FIG. 1B). Furthermore, the light control unit 2 includes a drive unit 24 that rotates the rotating shaft 23 as described above, and the drive unit 24 allows the wavelength conversion units 3r, 3g, and 3b to be relative to the light transmitting units 2a, 2b, and 2c. Various arrangements can be positioned.

  More specifically, in the illuminating device 10 shown in FIG. 1 of the present embodiment, three light emitting devices 1 are arranged on one surface 5 a of the circular flat wiring board 5. Each light emitting device 1 is arranged on a virtual circumference (not shown) spaced from the center of the wiring board 5 through which the rotary shaft 23 passes. Each light emitting device 1 includes, for example, an LED chip 11 that emits blue-violet light, and a convex lens-like light-transmissive member 12 that covers the LED chip 11. In addition, the LED chip 11 of each light-emitting device 1 uses the same specification (the semiconductor material of a light emitting layer, the light emission wavelength, and a structure are substantially the same). Moreover, as a material of each translucent member 12, a silicone resin, an epoxy resin, an acrylic resin, glass, etc. may be used, for example.

  The circular flat wiring substrate 5 used in the lighting device 10 of the present embodiment uses a metal base substrate, and is plated with, for example, Au on the one surface 5 a of the wiring substrate 5 to supply power to each light emitting device 1. A wiring pattern (not shown) is formed. External wirings (not shown) of the respective light emitting devices 1 are separately electrically connected to the wiring pattern of the wiring board 5 by conductive members (for example, AuSn, Ag paste, etc.) not shown. Has been.

  Moreover, the illuminating device 10 of this embodiment is provided with the reflection member 4 which reflects the light discharge | released from each light-emitting device 1 mounted in one surface 5a of the wiring board 5 to the panel 21 side. The reflecting member 4 used in the illumination device 10 of the present embodiment has an outer shape formed in a columnar shape, and an insertion hole 40 through which the rotating shaft 23 is rotatably inserted is provided in the central portion. The reflection member 4 is provided with three through holes 42 around the rotation shaft 23, and each through hole 42 is arranged in accordance with each light emitting device 1 mounted on one surface 5 a of the wiring board 5. . The side surface of each through hole 42 of the reflecting member 4 functions as a reflecting wall 41 that reflects the light emitted from each light emitting device 1 to the panel 21 side. A panel 21 to which the distal end portion of the rotating shaft 23 is fixed is provided on the side of the surface facing the one surface 5a of the wiring board 5 on which each light emitting device 1 is disposed via the reflecting member 4.

  The panel 21 used in the lighting device 10 of the present embodiment is formed in a circular flat plate shape that is substantially equal to the size of the outer shape of the cylindrical reflecting member 4. In the panel 21, light transmitting holes 21a, 21b, and 21c having different diameters are arranged at equal intervals for each of the fan-shaped places that are substantially equally divided into three around the rotating shaft 23 of the circular flat panel 21. Thus, translucent portions 2a, 2b and 2c are formed. Therefore, the circular plate-like panel 21 has different transmitted light amounts of light emitted from each light emitting device 1 with the same light intensity in each of the fan-shaped places divided approximately equally into three about the rotation shaft 23. become.

  In other words, the panel 21 of the dimmer 2 adjusts the light intensity of the light emitted from the light emitting device 1 without changing the amount of current supplied to each light emitting device 1 with the circular plate-like panel 21 around the rotation axis 23. It can be made different for each fan-shaped place divided into three equal parts.

  The illuminating device 10 of the present embodiment is provided with a circular flat plate-like light emitting unit 3 that is substantially equal to the size of the outer shape of the panel 21, apart from the panel 21 of the light control unit 2. The light emitting unit 3 includes a plurality (three in this case) of wavelength conversion units 3r, 3g, and 3b disposed in correspondence with the respective through holes 42 of the reflecting member 4 through the panel 21. The wavelength conversion parts 3r, 3g, 3b of the light emitting part 3 in the illumination device 10 of the present embodiment are each formed in a circular shape, and are arranged at substantially equal intervals around the center part of the light emitting part 3. Yes. The wavelength conversion units 3r, 3g, and 3b of the light emitting unit 3 are respectively excited by the blue-violet light from the light emitting device 1 to emit red fluorescence and excited by the light from the light emitting device 1 to be green. It functions as a wavelength conversion unit 3g that emits blue fluorescence with light from the wavelength conversion unit 3g that emits fluorescence or light from the light emitting device 1.

The wavelength conversion unit 3r that emits red fluorescence of the light emitting unit 3 used in the illumination device 10 of the present embodiment absorbs blue-violet light from the LED chip 11 and can emit red fluorescence (for example, red phosphor) , Eu-activated CaAlSiN _{3 and the} like) are uniformly dispersed in a silicone resin as a binder and cured.

  In addition, the wavelength conversion unit 3g that emits green fluorescence from the light emitting unit 3 absorbs the blue-violet light from the LED chip 11 and emits green fluorescence (for example, β activated by Eu). -SiAlON etc.) are uniformly dispersed in a silicone resin as a binder and cured.

Further, the wavelength conversion unit 3b that emits blue fluorescence from the light emitting unit 3 is a blue phosphor that can absorb blue-violet light from the LED chip 11 and emit blue fluorescence (for example, La activated by Ce). _3, such as Si ₈ N ₁₁ O ₄₎ and uniformly dispersed in a silicone resin as a binder and cured.

  Further, the light control unit 2 in the illumination device 10 of the present embodiment includes a drive unit 24 (for example, a stepping motor or a servo motor) that rotates a rotation shaft 23 fixed to the center portion of the panel 21. . In addition, the illumination device 10 shown in FIG. 1B is separated from the light emitting unit 3, the panel 21 of the light control unit 2, the reflecting member 4, and the wiring substrate 5 for convenience so that the internal structure can be grasped. Is shown.

  The illuminating device 10 of this embodiment controls and rotates the drive part 24 with the control signal from the below-mentioned control part which is not illustrated. The driving unit 24 rotates the panel 21 fixed to the other end of the rotating shaft 23 by rotating the rotating shaft 23 having one end fixed to the driving unit 24. The drive unit 24 can arrange the fan-shaped place corresponding to the position of each through hole 42 of the reflection member 4 from which the light from the light emitting device 1 is radiated by the rotation of the panel 21. Here, the light emitting unit 3 in the illumination device 10 of the present embodiment includes the wavelength conversion units 3r, 3g, and 3b of the light emitting unit 3 and the through holes 42 of the reflecting member 4 regardless of the rotation of the panel 21. Are fixed in a one-to-one correspondence.

  The illuminating device 10 rotates and positions the panel 21 of the light control unit 2 by the driving unit 24, whereby the light emitted from each light emitting device 1 with a constant light intensity is transmitted through the light transmitting unit 2a having different transmitted light amounts. , 2b, and 2c, the light is adjusted and emitted. The dimming unit 2 of the illuminating device 10 can vary the light intensity transmitted through the panel 21 and irradiated to each of the wavelength conversion units 3r, 3g, 3b of the light emitting unit 3.

  That is, in the illumination device 10 of the present embodiment, the light from the light emitting device 1 is dimmed into three types of light intensities different from each other by the dimming unit 2, and the wavelength conversion of the three types of light emitting units 3 having different emission colors By irradiating each of the units 3r, 3g, and 3b, illumination light having a desired color tone can be obtained by additive color mixing of light emitted from the wavelength conversion units 3r, 3g, and 3b.

  The illuminating device 10 of this embodiment does not need to change the drive current supplied to the light-emitting device 1 in order to make the color tone of illumination light variable. Therefore, the illuminating device 10 of this embodiment can keep the temperature of each structural member which comprises the illuminating device 10 constant, even if the color tone of illumination light is changed. Therefore, the illuminating device 10 according to the present embodiment can suppress deterioration of the illuminating device 10 caused by changing the color tone of the illumination light.

  Moreover, the light-emitting device 1 of the illuminating device 10 of this embodiment uses the LED chip 11 of the same specification. Therefore, the illuminating device 10 of this embodiment can each light-control to different light with the light control part 2, keeping all the drive current supplied to each LED chip 11 of the light-emitting device 1 substantially the same and constant. Therefore, the illuminating device 10 can make the calorific value of each light emitting device 1 substantially the same and constant. Moreover, the illuminating device 10 can comprise similarly the lighting circuit of each light-emitting device 1 from which luminescent color differs.

  Hereinafter, each structure used for the illuminating device 10 of this embodiment is explained in full detail.

  The light emitting device 1 used in the lighting device 10 of the present embodiment includes a solid light emitting element that can emit light when energized. Examples of the solid light emitting element include an LED chip, an LD (laser diode) element, and an organic EL element. The light emitting device 1 only needs to be able to emit light that excites the phosphor in the wavelength conversion units 3r, 3g, and 3b (for example, a translucent resin containing the phosphor) provided in the light emitting unit 3. Therefore, the solid-state light emitting element of the light emitting device 1 is not limited to the one that emits blue-violet light. For example, ultraviolet light or blue light that can excite the phosphors of the wavelength conversion units 3r, 3g, and 3b that efficiently emit visible light. Those emitting other wavelengths may also be used. When the LED chip 11 is used as the solid state light emitting device, the LED chip is, for example, an n-type gallium nitride compound semiconductor on a crystal growth substrate such as a sapphire substrate, a spinel substrate, a gallium nitride substrate, a zinc oxide substrate, or a silicon carbide substrate. A layer in which an indium-containing gallium nitride compound body layer and a p-type gallium nitride compound semiconductor layer, which are light emitting layers having a multi-quantum well structure or a single quantum well structure, are sequentially stacked can be used.

  An LED chip using an insulating substrate as a crystal growth substrate is exposed on the same plane side by exposing a part of the n-type gallium nitride compound semiconductor layer from the p-type gallium nitride semiconductor layer side. An anode electrode and a cathode electrode can be formed respectively. Moreover, what is necessary is just to form an anode electrode and a cathode electrode in the LED chip using an electroconductive board | substrate on the both surfaces side of the thickness direction of a LED chip.

  Moreover, the light-emitting device 1 can also be set as the structure provided with solid light emitting elements, such as LED chip 11, and the fluorescent substance which absorbs the light from a solid light emitting element and converts it into visible light of a different wavelength. As the light emitting device 1 having such a configuration, for example, a device capable of emitting 7000K pale light can be cited.

  In the light emitting device 1 of the lighting device 10 of the present embodiment, each LED chip 11 is mounted on the one surface 5a of the wiring board 5 via a submount member (not shown) made of a material such as AlN. ing. Each light emitting device 1 is formed by sealing the LED chip 11 with a translucent member 12. The translucent member 12 can increase the light extraction efficiency from the LED chip 11. Further, when the LED chip 11 is electrically connected with a wire (not shown) or the like to form a power feeding path, the translucent member 12 can protect the wire or the like.

  The light emitting device 1 is not limited to the above-described configuration. For example, the light emitting device 1 has a common outer shape, and includes a recess that is recessed inside, and a pair of conductor patterns (not shown) on the inner bottom surface of the recess. May be used. In the light emitting device 1, each LED chip 11 may be mounted on the inner bottom surface of the recess in the package.

  The light emitting device 1 can configure a power feeding path of the LED chip 11 by using the pair of conductor patterns (for example, a conductor pattern plated with Au on the outermost surface) on the inner bottom surface of the recess in the package. . In addition, the light emitting device 1 may be formed by appropriately electrically connecting the wiring pattern formed on the one surface 5a of the wiring substrate 5 with AuSn or the like to form a power feeding path.

  As the package of the light emitting device 1, a ceramic substrate using alumina, aluminum nitride, or the like, a metal base substrate using a metal material such as Cu, Al, or Fe, an epoxy resin substrate, or the like can be used. Further, as the package of the light emitting device 1, for example, a package in which a pair of metal conductors are integrally formed of a resin material such as an acrylic resin or an epoxy resin may be used. In this case, the light emitting device 1 may cause the LED chip 11 and the pair of metal conductors to be electrically connected to each other, and the pair of metal conductors exposed from the resin material may function as the external electrodes of the light emitting device 1.

  In addition, in the illuminating device 10 of this embodiment, although the light-emitting device 1 is each provided with the one LED chip 11 corresponding to each wavelength conversion part 3r, 3g, 3b of the light-projection part 3, each LED chip 11 is provided. The number of each is not limited to one, and a plurality of each can be used. In this case, each LED chip 11 may be electrically connected in series, parallel, or series-parallel as appropriate using the conductor pattern. The LED chip 11 may be the same type, or may be a plurality of LED chips that emit different emission wavelengths.

  The dimming unit 2 used in the illumination device 10 of the present embodiment is capable of dimming light emitted from the light emitting device 1 as light having a plurality of different light intensities and transmitting the light to the outside.

  As such a dimming unit 2, for example, a panel 21 that has a plurality of translucent units 2a, 2b, and 2c that vary the amount of transmitted light of the light emitted from the light emitting device 1 to vary the light intensity depending on the location. And a rotation shaft 23 provided at the center of the panel 21 and capable of rotating the panel 21 relative to the wavelength conversion units 3r, 3g, 3b of the light emitting unit 3 around the center. It can be. Thereby, the light control part 2 rotates the panel 21 from which transmitted light amount changes with places, and the wavelength conversion parts 3r, 3g, and 3g of the light emission part 3 are kept constant while the drive current supplied to the light emitting device 1 is kept constant. The light intensity irradiated to 3b can be made variable.

  Further, the light control unit 2 may perform light control using a liquid crystal device (not shown) that controls the amount of light transmitted by the light emitting device 1. The liquid crystal device can be configured, for example, by sandwiching a liquid crystal material composed of liquid crystal molecules as a light control member between a pair of glasses provided with a transparent electrode facing each other in a matrix. The liquid crystal device can control the inclination of the liquid crystal molecules by controlling the voltage applied between the transparent electrodes, and can appropriately vary the amount of light transmitted through the liquid crystal device depending on the location of the liquid crystal device. Thereby, the light control part 2 can make the said light intensity irradiated to the wavelength conversion parts 3r, 3g, and 3b of the light-projection part 3 variable by driving the said liquid crystal device from which transmitted light amount changes with places. .

  In the illuminating device 10 illustrated in FIG. 2A of the present embodiment, for example, the size is set at the place of the panel 21 of the dimming unit 2 facing the wavelength conversion unit 3r that emits red light of the light emitting unit 3. A translucent portion 2c having a plurality of translucent holes 21c having the smallest diameter among the three different types of translucent holes 21a, 21b, and 21c is disposed (see the left side in FIG. 2A). A light transmitting portion 2b having a plurality of light transmitting holes 21b having a medium diameter is disposed at the place of the panel 21 facing the wavelength converting portion 3g that emits green light of the light emitting portion 3. (See the center in FIG. 2 (a)). A light transmitting portion 2a having a plurality of light transmitting holes 21a having the largest diameter is disposed at the place of the panel 21 facing the wavelength converting portion 3b that emits blue light of the light emitting portion 3 (FIG. 2 ( a) see right side).

  The light control unit 2 is configured to change the amount of light transmitted through each of the light transmitting units 2a, 2b, and 2c provided at the location of the panel 21 facing the wavelength conversion units 3r, 3g, and 3b of the light emitting unit 3 to red (R). For: For green (G): For blue (B) = 1: 2: 3. Note that the amount of transmitted light is illustrated by the size of a circle indicated by a broken line in FIG. As a result, the illuminating device 10 shown in FIG. 2A uses the cold color system having a high color temperature for the illumination light emitted from the emitting unit 3 of the illuminating device 10 while keeping the light intensity of each light emitting device 1 constant. It becomes possible to emit from the light emitting part 3 as the illumination light.

  Next, in the illuminating device 10 shown in FIG.2 (b), the illuminating device 10 same as Fig.2 (a) is used. The panel 21 of the illuminating device 10 shown in FIG. 2B has a plurality of light emitting devices 1 and light emitting portions 3 with respect to the center of the panel 21 as indicated by the broken arrows in FIG. It is fixed after rotating relatively. In the illuminating device 10, for example, a translucent part 2 a including a plurality of translucent holes 21 a having the largest diameter is disposed at a location of the panel 21 facing the wavelength conversion unit 3 r that emits red light of the light emitting unit 3. (See the left side in FIG. 2 (b)). A light transmitting portion 2c having a plurality of light transmitting holes 21c having the smallest diameter is disposed at the place of the panel 21 facing the wavelength converting portion 3g that emits green light of the light emitting portion 3 (FIG. 2). (See center in (b)). A translucent portion 2b having a plurality of translucent holes 21b having a medium diameter is disposed at the place of the panel 21 facing the wavelength converting portion 3b that emits blue light of the light emitting portion 3. (Refer to the right side in FIG. 2 (b)). The light control unit 2 is configured to change the amount of light transmitted through each of the light transmitting units 2a, 2b, and 2c provided at the location of the panel 21 facing the wavelength conversion units 3r, 3g, and 3b of the light emitting unit 3 to red (R). For: For green (G): For blue (B) = 3: 1: 2. Thereby, the illuminating device 10 shown in FIG.2 (b) is compared with the illuminating device 10 in Fig.2 (a), without changing the electric current supplied to each light-emitting device 1 of the illuminating device 10 in Fig.2 (a). Thus, it is possible to emit warm color illumination light having a low color temperature from the light emitting unit 3.

  Subsequently, the illumination device 10 illustrated in FIG. 2C also uses the same illumination device 10 as that in FIG. The panel 21 of the illuminating device 10 shown in FIG. 2C has a plurality of light emitting devices 1 and light emitting portions 3 with respect to the center of the panel 21 as indicated by the broken arrows in FIG. It is fixed after further rotating from the position of FIG. The illuminating device 10 includes, for example, a light-transmitting portion including a plurality of light-transmitting holes 21b having a medium diameter at a location of the panel 21 facing the wavelength conversion portion 3r that emits red light of the light emitting portion 3. 2b is arranged (see the left side in FIG. 2C). A light transmitting portion 2a having a plurality of light transmitting holes 21a having the largest diameter is disposed at the place of the panel 21 facing the wavelength converting portion 3g that emits green light of the light emitting portion 3 (FIG. 2). (See center in (c)). A light transmitting portion 2c having a plurality of light transmitting holes 21c having the smallest diameter is disposed at the place of the panel 21 facing the wavelength converting portion 3b that emits blue light of the light emitting portion 3 (FIG. 2 ( c) See right side in)). The light control unit 2 uses the transmitted light amount of each of the light transmitting units 2a, 2b, and 2c provided at the position of the panel 21 facing the wavelength converting units 3r, 3g, and 3b of the light emitting unit 3 for red (R). : For green (G): For blue (B) = 2: 3: 1. Thereby, the illuminating device 10 shown in FIG.2 (c) does not change the electric current supplied to each light-emitting device 1 of the illuminating device 10 in FIG.2 (b), and does not change the illuminating device 10 shown in FIG.2 (b). Compared with the illumination light emitted from the light emitting unit 3, it is possible to emit the illumination light that becomes mixed color light with higher relative visibility than the light emitting unit 3.

  In addition, the illuminating device 10 exchanges the panel 21 of the light control part 2, for example, the panel 21 of the light control part 2 which opposes each wavelength conversion part 3r, 3g, 3b of the light emission part 3 from which luminescent color differs. The amount of light transmitted through each of the light transmitting portions 2a, 2b, and 2c provided in the above may be changed to red (R): green (G): blue (B) = 3: 2: 1. In this case, the illuminating device 10 can irradiate illumination light that is reddish and has mixed color light with a low color temperature. The illuminating device 10 rotates the rotating shaft 23 provided in the center part of the panel 23 with the drive part 24, and positions the panel 21 with respect to the wavelength conversion parts 3r, 3g, 3b of the light emitting part 3 having different emission colors. When moved to a position where red (R): green (G): blue (B) = 1: 3: 2, illumination light that is mixed color light having a high color temperature is emitted from the light emitting unit 3. You can also

  Here, in order to emit mixed color light having a predetermined set color temperature from the illumination device 10, the ratio of the transmitted light amount in each of the light transmitting portions 2a, 2b, 2c of the panel 21 is, for example, as shown in Table 1. You only have to set it.

  In addition, as shown in FIG. 3, the lighting device 10 includes a dimming unit 2 ′ that changes the amount of transmitted light of the light emitted from the light emitting device 1 for each wavelength conversion unit 3 r, 3 g, 3 b of the light emitting unit 3. Correspondingly, a plurality of translucent portions 2aa to 2ac, 2ba to 2bc, and 2ca to 2cc having different transmitted light amounts may be provided. For example, in the case where the light transmitting part 2aa is arranged corresponding to the wavelength converting part 3r of the light emitting part 3, the light adjusting part 2 'corresponds to the light transmitting part 2ba and the wavelength converting part 3b corresponding to the wavelength converting part 3g. Correspondingly, the translucent parts 2ca are respectively arranged. For example, when the light adjusting unit 2 ′ is rotated and the light transmitting unit 2ab is disposed corresponding to the wavelength converting unit 3r of the light emitting unit 3, the light adjusting unit 2 ′ corresponds to the wavelength converting unit 3g. The translucent part 2cb is arranged corresponding to the translucent part 2bb and the wavelength converting part 3b, respectively. Similarly, when the dimming unit 2 ′ is rotated and, for example, the translucent unit 2ac is arranged corresponding to the wavelength converting unit 3r of the light emitting unit 3, the dimming unit 2 ′ has the wavelength converting unit 3g. Corresponding to the light transmitting portion 2bc and the light transmitting portion 2cc corresponding to the wavelength converting portion 3b. Thereby, the illuminating device 10 can adjust the color-mixed light radiate | emitted from the light emission part 3 more finely. In addition, the magnitude | size of each wavelength conversion part 3r, 3g, 3b of the light-projection part 3 used for the illuminating device 10 of FIG. 3 is each translucent part 2aa-2ac, 2ba-2bc, 2ca ~ of light control part 2 '. Corresponding to 2 cc (see the circular broken line in the plan view illustrating the dimming part 2 'in FIG. 3), it is formed slightly smaller than the wavelength converting parts 3r, 3g, 3b of the light emitting part 3 shown in FIG. is doing.

  Moreover, the panel 21 of the light control part 2 used for the illuminating device 10 of this embodiment is provided with the several fan-shaped member (not shown) each corresponding to the translucent part 2a, 2b, 2c, and a rotating shaft It is good also as a structure which combined the said fan-shaped member equally centering on 23. FIG. For example, the fan-shaped member of the panel 21 may be disposed in one-to-one correspondence with the wavelength conversion units 3r, 3g, and 3b of the light emitting units 3 having different emission colors. That is, the panel 21 is formed in a circular flat plate shape by arranging the fan-shaped members that are different light-transmitting portions 2a, 2b, and 2c substantially evenly around the center of the panel 21.

  The panel 21 combined with the fan-shaped members can be configured to be detachable so that it can be replaced with another fan-shaped member having a different amount of transmitted light. Thereby, the illuminating device 10 can change the color tone of the color-mixed light radiate | emitted from the light emission part 3 of the illuminating device 10 more finely by replacement | exchange of the said fan-shaped member which comprises the panel 21. FIG.

  As a material of the panel 21 used in the lighting device 10 of the present embodiment, various metal materials, resin materials, and the like can be appropriately used. The thickness of the panel 21 is preferably thinner in order to suppress the light emitted from the light emitting device 1 from being confined and attenuated inside the light transmitting parts 2a, 2b, 2c. Moreover, the thickness of the panel 21 should just be the thickness which can ensure the mechanical strength of the panel 21 at the minimum.

  Since the panel 21 has a difference in the amount of light transmitted through the light transmitting portions 2a, 2b, and 2c depending on the location of the panel 21, not only a plurality of light transmitting holes 21a, 21b, and 21c having different diameters are arranged at the same interval. The translucent holes 21d having the same diameter all indicated by 4 may be arranged at different intervals.

  That is, since the panel 21 provides a difference in the amount of light transmitted through the light transmitting portions 2a, 2b, and 2c, the interval between the light transmitting holes 21a, 21b, and 21c, the size of the diameter, and the like can be appropriately changed. Moreover, although the shape of the translucent holes 21a, 21b, and 21c constituting the translucent portions 2a, 2b, and 2c of the panel 21 used in the lighting device 10 of the present embodiment is formed in a circular shape, it is not limited thereto. I can't. Therefore, the shape of the light transmitting hole may be a polygonal shape such as a triangular shape or a quadrangular shape.

  The panel 21 may be provided with a light shielding layer having a high reflectance or a low transmittance with respect to light emitted from the light emitting device 1 on one surface on the light emitting device 1 side. The light shielding layer may be formed, for example, by vapor-depositing various metal materials or black oxides, or may be formed by applying a black paint. The panel 21 can adjust the light intensity from the light emitting device 1 with good controllability by the light shielding layer. Thereby, the panel 21 of the light control part 2 in the illuminating device 10 of this embodiment can perform the role which light-controls and dims part of the light from the light-emitting device 1, with sufficient controllability.

  The translucent parts 2a, 2b, 2c provided in the panel 21 are appropriately set in shape, size, number, interval, etc. in consideration of the color tone of the illumination light emitted from the light emitting part 3 of the illumination device 10. It can be formed with a light transmitting hole. The light-transmitting portions 2a, 2b, and 2c may be anything that can change the amount of transmitted light, and a light-shielding mask (not shown) that shields light except for a portion that transmits light to the light-transmitting panel 21. ) May be formed.

  Further, a light diffusing material (not shown) that scatters light from the light emitting device 1 or an absorber (not shown) that absorbs light from the light emitting device 1 is used as the light transmitting portions 2a, 2b, and 2c. It can also be configured. In other words, the panel 21 adjusts and arranges the contents of the light diffusing material and the absorbing material according to the location of the panel 21, thereby controlling the transmitted light amount of the light emitted from the light emitting device 1. 2b and 2c can also be provided. The panel 21 for adjusting the content of the light diffusing material or the absorbing material depending on the location of the panel 21 can be formed by molding by a multicolor molding method using resin materials having different contents such as the light diffusing material. .

  In order to obtain illumination light of a desired color tone from the light emitting unit 3 of the illuminating device 10, the amount of transmitted light necessary for the light transmitting units 2 a, 2 b, 2 c provided in the panel 21 is the wavelength converting unit 3 r of the light emitting unit 3. , 3g, 3b, and the chromaticity point of the desired illumination light in the CIE xy chromaticity coordinates.

  The rotating shaft 23 of the light control unit 2 used in the lighting device 10 of the present embodiment is provided for rotating the panel 21 of the light control unit 2. The rotating shaft 23 is fixed to the center portion of the panel 21. What is necessary is just to form the fixing method of the rotating shaft 23 to the panel 21 using suitable methods, such as adhesion | attachment with an adhesive agent, or fixing with a screw | thread, for example. Further, the panel 21 and the rotary shaft 23 may be formed by integral molding. The material of the rotating shaft 23 is not particularly limited, such as a metal material or a resin material.

  The dimming unit 2 of the illumination device 10 of the present embodiment is a servo that adjusts the rotation angle based on the position information of the panel 21 from, for example, a stepping motor or a position detection sensor that rotates in synchronization with a signal from a pulse oscillator. By the driving unit 24 using a motor or the like, the rotation shaft 23 of the panel 21 can be rotated to position the panel 21. The lighting device 10 can change the color tone of the illumination light by rotating the panel 21 and performing positioning control. In addition, the illuminating device 10 is good also as a structure which not only rotates the panel 21 using the drive part 24 but makes the color tone of illumination light variable by rotating the panel 21 manually.

  Next, the light emission part 3 of the illuminating device 10 of this embodiment plays the role which wavelength-converts and radiate | emits the light radiated | emitted by each light transmission part 2a, 2b, 2c of the light control part 2 and radiated | emitted. . The light emitting unit 3 includes wavelength conversion units 3r, 3g, and 3b that perform wavelength conversion of at least a part of the light emitted from the light emitting device 1 in order to emit light of different emission colors. The wavelength conversion units 3r, 3g, 3b of the light emitting unit 3 appropriately illuminate the phosphor so that the light having the respective emission colors can be emitted (for example, silicone resin, epoxy resin, acrylic resin, glass, etc.) ) To be formed.

  The light emitting unit 3 of the illuminating device 10 does not necessarily need to form the wavelength converting units 3r, 3g, and 3b in a circular shape, and each wavelength converting unit as illustrated in the plan view of the light emitting unit 3 in FIG. 3r, 3g, and 3b may be formed in a fan shape.

  Moreover, the illuminating device 10 is provided not only with one wavelength conversion part 3r, 3g, 3b of the light emission part 3 with respect to each translucent part 2a, 2b, 2c of the panel 21, but with multiple each. Also good. That is, the illuminating device 10 emits red light, a wavelength converter 3r that emits red light, a wavelength converter 3g that emits green light, and blue light, as illustrated in the plan view of the light emitting unit 3 in FIG. A plurality (three in each case) of wavelength converters 3b to be provided can be provided. The wavelength conversion unit that emits red light of the light emitting unit 3 includes three types of wavelength conversion units 3ra, 3rb, and 3rc having different contents in the translucent material of the phosphor capable of emitting red fluorescence. That's fine. Similarly, the wavelength conversion unit that emits green light of the light emitting unit 3 includes three types of wavelength conversion units 3ga, 3gb, and 3gc, each having a different content in the translucent member of the phosphor capable of emitting green fluorescence. Should be provided. Furthermore, the wavelength conversion unit that emits blue light of the light emitting unit 3 includes three types of wavelength conversion units 3ba, 3bb, and 3bc, each having a different content in the translucent member of the phosphor capable of emitting blue fluorescence. You should prepare. Thereby, the illuminating device 10 can control the color tone of illumination light more finely.

  Further, the light emitting unit 3 of the illumination device 10 includes a plurality of wavelength conversion units 3r that emit the same red light, a wavelength conversion unit 3g that emits the same green light, and a wavelength conversion unit 3b that emits the same blue light. It may be provided individually. In this case, as illustrated in the plan view of the light emitting unit 3 in FIG. 5C, the light emitting unit 3 of the illuminating device 10 includes each wavelength conversion unit 3 b, from the center side of the light emitting unit 3 toward the outer periphery. Each 3g and 3r can be arranged concentrically in order. Further, as illustrated in the plan view of the light emitting unit 3 in FIG. 5D, the illumination device 10 has each wavelength of the light emitting unit 3 provided with a plurality of wavelength converting units 3r, 3g, 3b. You may arrange | position the conversion parts 3r, 3g, and 3b at random. In the illuminating device 10 using the light emitting unit 3 of FIG. 5D, the light emitting unit 3 of the illuminating device 10 emits light compared to the illuminating device 10 using the light emitting unit 3 of FIG. It is possible to reduce the color unevenness of the mixed color light. The arrangement and shape of the wavelength conversion units 3r, 3g, and 3b of the light emitting unit 3 may be appropriately set in correspondence with the light transmitting units 2a, 2b, and 2c that transmit the light of the light control unit 2.

  Moreover, when the light-emitting device 1 radiates | emits visible light, such as blue light, the light-projection part 3 of the illuminating device 10 can also be used as it is, without carrying out wavelength conversion of a part of blue light. Therefore, the light emitting unit 3 in the illuminating device 10 does not necessarily need to wavelength-convert all the light transmitted through the light control unit 2 by the wavelength conversion unit. That is, the illumination device 10 includes a wavelength conversion unit 3r that emits red light and a wavelength conversion unit that emits green light, instead of the light emission unit 3 including three types of wavelength conversion units 3r, 3g, and 3b. 3g and an opening (not shown) capable of transmitting blue light from the light emitting device 1 may be provided, and the wavelength converter 3b that emits blue light may not be provided.

  In addition, the light emission part 3 of the illuminating device 10 may arrange | position the diffusion layer which diffuses and permeate | transmits blue light in the said opening part which permeate | transmits blue light. The diffusion layer adjusts the emission angle of the light emitted from the opening of the light emitting part 3 by adjusting the content ratio of the light diffusing material contained in the translucent material (for example, silicone resin). It becomes possible to do. Thereby, the light emitting unit 3 of the illumination device 10 aligns the radiation angle of the light emitted from the other wavelength conversion units 3r and 3g and the radiation angle of the light emitted from the opening provided with the diffusion layer. The color mixing property can be further improved by aligning the light distribution characteristics of the mixed color light emitted from the light emitting unit 3 of the illumination device 10. That is, each wavelength conversion unit 3r, 3g, 3b of the light emitting unit 3 may appropriately contain not only the phosphor but also the phosphor and the light diffusing material.

In order to increase the range in which the color tone of the emitted light emitted from the illumination device 10 is variable, the color tone of the light emitted from the wavelength conversion units 3r, 3g, and 3b of the light emitting unit 3 is CIE xy color. What is necessary is just to use the wavelength conversion parts 3r, 3g, and 3b of the luminescent color as close as possible to the spectrum locus in degree coordinates. Further, the color tone of the illumination light emitted from the illumination device 10, the case of a variable with respect to the color tone of the CIE standard illuminant D _65, the light emitting portion 3 of the illumination device 10, a white reddish using the wavelength converting member Light, green white light, blue white light, and the like can also be used. Therefore, each wavelength conversion part 3r, 3g, 3b of the light emission part 3 of the illuminating device 10 not only emits red light, green light and blue light, but also white light with strong redness, white light with strong blueness and It may emit white light with strong greenness.

  In addition, the light emitting unit 3 of the illumination device 10 may be appropriately formed with a reflective layer made of a metal material or the like that reflects light in a portion where the wavelength conversion units 3r, 3g, and 3b are not disposed. The reflection layer of the light emitting unit 3 can make the color tone of the lighting device 10 variable with high controllability by increasing the reflectance of one surface of the light control unit 2 side.

  Next, the reflecting member 4 of the lighting device 10 according to the present embodiment plays a role of reflecting light emitted from each light emitting device 1 to the panel 21 side of the light control unit 2. The reflecting member 4 may be formed by coating the surface of the reflecting wall 41 with a metal material having a high reflectivity by vapor deposition or sputtering. The shape of the reflection wall 41 of the reflection member 4 may be designed in an appropriate shape such as a paraboloid of reflection surface in consideration of the light distribution of each light emitting device 1.

  The wiring board 5 used in the lighting device 10 of the present embodiment can mount the light emitting device 1. The wiring substrate 5 is provided with a wiring pattern (not shown) for securing power supply to the light emitting device 1. In order to efficiently dissipate the heat from the light emitting device 1, it is preferable that the wiring substrate 5 is a metal substrate using AlN, alumina ceramics, or a metal as a base material. When a conductive metal substrate is used for the wiring substrate 5, an insulating layer (not shown) for ensuring insulation may be appropriately provided between the wiring pattern and the metal substrate.

  When the light intensity of the light emitted from the light emitting device 1 is small and the heat generation amount of the light emitting device 1 is small, the wiring substrate 5 may be configured using a glass epoxy substrate, a paper phenol substrate, or the like. In addition, although the wiring board 5 of the illuminating device 10 of this embodiment makes the shape of the wiring board 5 the circular flat plate shape, it is not restricted to this. Therefore, the wiring substrate 5 may be formed in a polygonal plate shape such as an elliptical plate shape or a rectangular plate shape.

In addition, the lighting device 10 may be provided with a reflective film (not shown) on the one surface 5 a of the wiring board 5. The reflective film can efficiently reflect the light emitted from the light emitting device 1. Specifically, the reflective film can be a metal material such as Al, Al alloy, Ag, or Ag alloy, or a white pigment such as BaSO _4. What is necessary is just to comprise using the glass containing the inorganic material which becomes.

  In addition, the illumination device 10 of the present embodiment includes a control unit (not shown) including a microcomputer for controlling the light control unit 2 that adjusts and transmits the light emitted from each light emitting device 1. It can also be provided. For example, the control unit emits light having a different light intensity for each of the wavelength conversion units 3r, 3g, and 3b when adjusting the color temperature of the illumination light emitted from the illumination device 10, and thus dimming the light. The memory | storage part which memorize | stored the table which matched the light control of the light which the part 2 permeate | transmits is provided. In addition, the control unit controls the drive unit 24 that rotates the panel 21 of the light control unit 2 so that the light transmitted through the light control unit 2 is light adjusted to a predetermined light intensity. The control unit controls the panel 21 with the drive unit 24 via the rotating shaft 23 of the light control unit 2 based on the color adjustment signal corresponding to the color temperature set by the operation of the color temperature setting unit (not shown). You may comprise so that it may rotate and control.

  In addition, the lighting device 10 may be separately provided with a light distribution control unit (not shown) such as a reflecting plate, a diffusion plate, or a lens in order to control the light distribution of the light emitted from the light emitting unit 3. .

  The illuminating device 10 of this embodiment does not need to change the drive current supplied to the light-emitting device 1 in order to make the color tone of the irradiation light emitted from the illuminating device 10 variable. In the illuminating device 10 of the present embodiment, heat generated when the light emitting device 1 is turned on is generated in the same manner in each of the three light emitting devices 1.

  That is, the lighting device 10 does not need to change the drive current supplied to the light emitting device 1, can keep the temperature of each component member constituting the lighting device 10 substantially constant, There is an effect that it is possible to suppress the occurrence of stress. Moreover, in the illuminating device 10 of this embodiment, in order to make the color tone of illumination light variable, a control circuit that individually controls the drive current supplied to each light emitting device 1 for each light emitting device 1 may be unnecessary. it can.

  Furthermore, in the illuminating device 10 of this embodiment, even when the color tone of illumination light is changed, there is substantially no temperature change in the LED chip 11 itself of the light emitting device 1. Therefore, immediately after the light emitted from each light emitting device 1 of the lighting device 10 changes the color tone of the illumination light, the illumination light having a stable color tone is irradiated without a wavelength shift due to a temperature change of the LED chip 11 itself. be able to.

(Embodiment 2)
In the present embodiment, instead of using only one panel 21 in the lighting device 10 of the first embodiment shown in FIG. 1 to form the light control unit 2, two panels having substantially the same shape as shown in FIG. The difference is that the light control unit 2 is configured using 21 and 22. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1, and description is abbreviate | omitted suitably.

  The illuminating device 10 shown in FIG. 6 includes a light emitting device 1 that emits light that excites a phosphor, a light adjusting unit 2 that adjusts and transmits light emitted from the light emitting device 1, and the light adjusting unit 2. The light emitting unit includes three types of wavelength conversion units 3r, 3g, and 3b having the above-described phosphor that absorbs the light transmitted through and converts it into visible light having different wavelengths (here, red light, green light, and blue light). 3.

  The dimming unit 2 in the illumination device 10 of the present embodiment has a plurality of (here, three) translucent units 2a, 2b, and 2c that vary the amount of transmitted light of the light emitted from the light emitting device 1, respectively. The light emitting unit 3 includes wavelength conversion units 3r, 3g, and 3b corresponding to the light transmitting units 2a, 2b, and 2c.

  Here, the light control unit 2 includes the panels 21 and 22 that change the light intensity of the light transmitted through the light transmitting parts 2a, 2b, and 2c depending on the location by the light transmitting parts 2a, 2b, and 2c, and the panel 21. , 22 is provided with a rotation shaft 23 that allows the panels 21 and 22 to rotate relative to the wavelength conversion parts 3r, 3g, 3b of the light emitting part 3 around the central part. Yes.

  In particular, the light control unit 2 is configured by laminating a plurality of (two in this case) panels 21 and 22 having the same shape, and rotating at least one of the panels 21 and 22 around the center of the panels 21 and 22. By doing so, the ratio at which the light transmitting portions 2a, 2b, 2c of the two panels 21, 22 overlap is made variable.

  More specifically, the light control part 2 used for the illuminating device 10 of this embodiment is provided with the pair of panels 21 and 22 of the same shape provided with several translucent part 2a, 2b, 2c. The translucent portions 2a, 2b and 2c of the panels 21 and 22 are provided with a plurality of types of translucent holes 21a to 21c and 22a to 22c having different sizes for the translucent portions 2a, 2b and 2c, respectively. . When the pair of panels 21 and 22 are overlapped with the positions of the panels 21 and 22, the transmitted light amounts of the pair of panels 21 and 22 are substantially equal to the transmitted light amounts of the panels 21 and 22. Is formed.

  The pair of panels 21 and 22 are provided at the center of the other panel 22 separately from the rotation of the one panel 21 (see the broken arrow in FIG. 6B). The other panel 22 is configured to be rotatable by rotating a rotating shaft 23 (not shown) coaxially with a rotating shaft 23 (see an arrow of a one-dot chain line in FIG. 6B).

  In the light control unit 2 of the lighting device 10 of the present embodiment, one panel 21 is rotated with respect to the other panel 22 from the state in which the positions of the light transmitting units 2a, 2b, and 2c of the pair of panels 21 and 22 are aligned. As a result of the movement, the ratio of the overlapping of the light transmitting portions 2a, 2b, 2c of the panels 21, 22 changes, and the light transmitting holes 21a-21c, 22a-22c of the pair of panels 21, 22 are displaced from each other. The amount of transmitted light changes.

  The dimming unit 2 of the illuminating device 10 includes the wavelength conversion units 3r, 3r, and 2b of the light emitting unit 3 from the light emitting device 1 that transmits the pair of panels 21 and 22 due to a change in the overlapping ratio of the light transmitting units 2a, 2b, and 2c. It becomes possible to change the amount of light transmitted through 3g and 3b. Thereby, the illuminating device 10 makes the color tone of illumination light variable by dimming the light of each luminescent color radiated | emitted from each wavelength conversion part 3r, 3g, 3b from which the luminescent color of the light emission part 3 differs. be able to.

  In particular, the dimming unit 2 in the lighting device 10 of the present embodiment rotates the one panel 21 and the other panel 22, respectively, so that the light emitting unit 3 is compared with the lighting device 10 of the first embodiment. The light intensity for each luminescent color emitted from each of the wavelength converters 3r, 3g, 3b can be changed more finely.

  In addition, the one panel 21 and the other panel 22 do not necessarily need to be provided with the light transmitting portions 2a, 2b, and 2c having the same configuration. Therefore, the translucent portions 2a, 2b, 2c of one panel 21 and the translucent portions 2a, 2b, 2c of the other panel 22 have translucent holes 21a-21c, 22a-22c having different sizes and shapes, respectively. It may be provided and configured. Further, it is not always necessary to rotate both the one panel 21 and the other panel 22, and only one of them can be rotated. Furthermore, the light control part 2 in the illuminating device 10 of this embodiment is not restricted only to what uses the two panels 21 and 22, The wavelength conversion part of the light-projection part 3 by overlapping a panel every three or more pieces It is good also as a structure which each light-controls the light of each luminescent color radiated | emitted from 3r, 3g, 3b.

(Embodiment 3)
In the present embodiment, instead of using the reflecting member 4 having the reflecting wall 41 in the illumination device 10 of the second embodiment shown in FIG. 6, the light emitted from the plurality of light emitting devices 1 shown in FIG. 7 is reflected. The difference is that the reflecting member 4 provided with the outer peripheral wall 43 is used. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1 and Embodiment 2, and description is abbreviate | omitted suitably.

  In the illumination device 10 of the present embodiment, a plurality of light emitting devices 1 having LED chips 11 are provided on one surface 5a of the wiring board 5 (here, three), and a reflecting member that reflects light from the light emitting device 1. 4 is used as a single light source. The light emitted from the light source and reflected by the panels 21 and 22 is transmitted to the panel 21 by the one surface 5a side of the wiring board 5 and the outer peripheral wall 43 of the reflecting member 4. , 22 is reflected on the entire surface.

  Although the reflecting member 4 of the lighting device 10 shown in FIG. 7 of the present embodiment is provided with an outer peripheral wall 43 surrounding all the light emitting devices 1 arranged on the one surface 5a side of the wiring board 5, it is shown in FIG. Like the reflecting member 4 in the illuminating device 10 of Embodiment 2, the reflecting wall 41 surrounding each light-emitting device 1 separately is not provided. Therefore, as for the illuminating device 10 of this embodiment, each light-emitting device 1 is not isolated from each other by the reflecting wall 41 of the reflecting member 4 like the illuminating device 10 of Embodiment 2 shown in FIG.

  Thereby, the light from the light emitting device 1 reflected by the panels 21 and 22 in the light control unit 2 of the lighting device 10 of the present embodiment is caused by the one surface 5a side of the wiring board 5 and the outer peripheral wall 43 of the reflecting member 4. Again, the light is reflected by the entire panel 21 and 22 side, and can be radiated from the light transmitting portions 2a, 2b, and 2c of the panels 21 and 22 to the light emitting portion 3 side and taken out.

  In particular, in the lighting device 10, when the transmittance of the light control unit 2 is set low, the ratio of the light emitted from the light emitting device 1 reflected by the panels 21 and 22 on the light control unit 2 side tends to increase. is there. The illuminating device 10 again reflects the light reflected by the panels 21 and 22 on the light control unit 2 side by the one surface 5a side of the wiring board 5 and the outer peripheral wall 43 of the reflection member 4. As a result of reflection on the entire side, it is possible to suppress a decrease in the light emission efficiency of the entire illumination device 10.

  Note that the lighting device 10 effectively uses the light emitted from each light emitting device 1, so that the panel 21 facing the one surface 5 a of the wiring substrate 5 via the reflecting member 4 on the one surface 5 a side of the wiring substrate 5. , 22 and the reflectance of the surface of the outer peripheral wall 43 of the reflecting member 4 are preferably increased. In order to increase the above-described reflectance, the lighting device 10 has a high reflectance on the one surface 5a side of the wiring board 5, the outer peripheral wall 43 of the reflecting member 4, and the surface on one surface side of the panels 21 and 22 in the light control section 2. A reflective film (not shown) may be formed as appropriate.

  As a material of such a reflective film, for example, a white polymer made of a metal material such as Ag or Al, a resin material containing a white pigment such as barium sulfate, and the like, a large number of fine bubbles of 10 μm or less are formed. Examples thereof include a foamed polymer such as polyethylene terephthalate, and a dielectric multilayer film that reflects light having an emission wavelength emitted from the light emitting device 1. When the reflective film is formed of a metal material, an insulating layer may be appropriately formed for the purpose of insulating the wiring substrate 5 from the wiring pattern.

  Thereby, the illuminating device 10 surrounded the light emitted from each light emitting device 1 by the one surface side of the panels 21 and 22 in the light control unit 2, the outer peripheral wall 43 of the reflecting member 4, and the one surface 5 a of the wiring substrate 5. It is possible to suppress absorption inside. That is, the illuminating device 10 can reduce the loss of light emitted from the light emitting device 1 inside the illuminating device 10, and can suppress a decrease in the light emission efficiency of the illuminating device 10.

DESCRIPTION OF SYMBOLS 1 Light-emitting device 2 Light control part 2a, 2b, 2c Light transmission part 3 Light emission part 3r, 3g, 3b Wavelength conversion part 4 Reflective member 5 Wiring board 5a One surface 10 Illumination device 11 LED chip 21, 22 Panel 23 Rotating shaft 24 Drive part

Claims (5)

  A light-emitting device that emits light that excites the phosphor, a light-modulating unit that modulates and transmits the light emitted from the light-emitting device, and absorbs the light transmitted by the light-modulating unit into visible light of a different wavelength And a light emitting part having a wavelength conversion part having the phosphor to be converted, and the light control part has a plurality of light transmitting parts that vary the amount of transmitted light of the light emitted from the light emitting device. In addition, the light emitting unit includes at least one wavelength conversion unit corresponding to a plurality of the light transmitting units.   The light control unit includes a panel that changes the light intensity of light transmitted through the light transmitting unit by a plurality of the light transmitting units, and a panel that is provided at a central portion of the panel and that has the central portion as a center. The lighting device according to claim 1, further comprising: a rotation shaft that is rotatable relative to the wavelength conversion unit of the light emitting unit.   The dimming part is a ratio in which the translucent parts of the plurality of panels overlap each other by laminating a plurality of the panels having the same shape and rotating at least one of the panels around the central part. The lighting device according to claim 2, wherein the lighting device is variable.   The said light control part is provided with the drive part which rotates the said rotating shaft, The relative arrangement | positioning of the said wavelength conversion part and the said translucent part can be positioned by this drive part, It is characterized by the above-mentioned. Or the illuminating device of Claim 3.   The light emitting device includes a plurality of wiring boards on one surface having a wiring pattern for supplying power to the light emitting device, and is surrounded by a reflecting member that reflects light emitted from the light emitting device as a single light source. 5. The light emitted and reflected by the panel is reflected on one surface side of the wiring board and the entire panel side by the reflecting member. The lighting device described in 1.

Images