JP4354435B2 - Light emitting device and lighting device - Google Patents

Description

The present invention relates to a single kind of light emitting diode (LED: Lighting)
The present invention relates to a light emitting device using a semiconductor light emitting element such as an Emitting Diode) and a lighting device using the same.

  Conventionally, light emitting devices that make color light variable are realized by a method of dimming each of a plurality of light sources of different light colors and a method of switching color filters of several colors mounted on the surface of the light source. Furthermore, as a method of using a plurality of arc tubes in the former method, there are a lighting fixture for dimming RGB three-color fluorescent tubes to obtain arbitrary color light, and a plurality of arc tubes having light colors different from those of the light guide as in Patent Document 1. In a backlight comprising the above, a method has been proposed in which the light emission position of the arc tube is controlled to change the color light on the surface of the light guide.

  Moreover, as an example using an LED light source, as shown in Patent Document 2, there is one in which a plurality of LEDs are used to adjust light and change color light respectively.

Japanese Patent Laying-Open No. 2004-55563 (page 7-8, FIG. 1) JP 2003-317516 A (page 4, FIG. 1)

  However, in the method using a plurality of fluorescent tubes having different light colors and the method of Patent Document 1, a light source lamp, a high-frequency AC drive circuit (inverter), etc. are expensive. Therefore, it is difficult to reduce the size of the light emitting device. Further, when an arbitrary light color is obtained by dimming each of the RGB arc tubes, a dimming circuit is also required and tends to be more expensive.

  On the other hand, in the case of a light emitting device composed of a plurality of LEDs as in Patent Document 2, it is possible to cope with a certain size reduction. However, in this method, the forward voltage of each of the plurality of LEDs is generally different, and further, it is necessary to perform LED light output control in accordance with the forward current characteristics (forward current-light flux). There was a drawback that cost burden occurred. In addition, due to the difference in the characteristics of the LED emission characteristics of each color and the characteristics with respect to the surrounding environment such as temperature, a color correction circuit for eliminating such color misregistration is required in applications that require light color management.

  The present invention has been made in order to solve the above-described problems, and includes a single type of semiconductor light source that emits short wavelength light and a plurality of types of wavelength conversion members that can be rotated or slid. It is an object of the present invention to obtain a light-color-variable light-emitting device having a small size, low cost, and high light emission efficiency, and a lighting device using the same.

In order to solve the above problems, the light emitting device of the present invention can be realized by the following means. That is,
A single type of semiconductor light source that emits short-wavelength light;
The semiconductor light emitting source is incorporated, an opening is provided on the light emitting side from the semiconductor light emitting light source , a light transmitting member is provided on the light emitting side of the housing , and the inner surface is made of a highly reflective material at least in the visible light region. A formed housing;
It is provided so as to be rotatable or slidable so as to face the opening of the casing, and can be converted into visible light by irradiating the light source light of the semiconductor light emitting light source as excitation light. And a wavelength conversion unit including a plurality of different wavelength conversion members.

  The following effects can be obtained by the present invention. A single type of semiconductor light-emitting light source that emits short-wavelength light, a wavelength conversion unit that performs wavelength conversion to visible light in a reflective manner using the light source light as excitation light, and enables irradiation to the wavelength conversion unit by the light source light And a housing having an opening that faces the wavelength conversion unit, and the wavelength conversion unit is configured as a movable body including a series of a plurality of wavelength conversion members having different conversion wavelength spectra. It is possible to obtain a light-color variable light-emitting device having a simple structure and high luminous efficiency that can be easily incorporated into a display device and can be reduced in size and cost. Furthermore, since the wavelength conversion unit can be configured to be replaceable (can be prepared as a replacement part), it is possible to realize light color changes of various patterns.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings in the case of using an LED as a semiconductor light emitting source.

Embodiment 1 FIG.
1 is a cross-sectional side view of a light-emitting device showing Embodiment 1 of the present invention, and FIG. 2 is a top view of the light-emitting device.
The light emitting device includes an LED package 6, a package mounting portion 7 to which the LED package 6 is attached, a housing 10, and a wavelength conversion portion that is rotatably mounted with a part facing the opening 11 of the housing 10. 20 and a light transmission member 30 made of transparent glass or resin attached to the light emitting surface of the housing 10.

  The LED package 6 includes an LED element 1, an LED board 2 made of resin, ceramic, metal, or the like on which the LED element 1 is mounted, a reflector 3 provided on a side surface of the LED element 1, and a translucent material that seals them. It is comprised from the sealing resin 4 and the electrode 5 formed in the back surface of the LED board 2. As shown in FIG. The LED element 1 has an emission wavelength in the ultraviolet to blue range of about 350 nm to 470 nm that can excite the wavelength conversion member 23 (23a, 23b, 23c) (regardless of the type of face-up or face-down). Configure as. Here, although the LED package 6 is configured to be assembled from the LED element 1, a commercially available LED of a surface mount type or a shell type package may be used. In addition, as shown in FIG. 2, the LED package 6 is arranged with a plurality of (here, five) single-type ones arranged in the axial direction of the rotating body 21, but may be one. Further, the LED package 6 is disposed at the center of the light source side surface (back surface) of the light transmitting member 30 in the configuration example of FIG.

  The LED package mounting portion 7 is made of a material that has an electrode connection portion (not shown) and that can mount the LED package 6. For example, a thin aluminum material having heat dissipation is used as a base material, surface insulation treatment is performed, and a conductive pattern is formed thereon. At this time, the light-emitting efficiency of the light-emitting device can be improved by forming the insulating surface so as to have at least a high reflectance with respect to visible light.

  The housing 10 is configured so that an opening 11 is provided in a part thereof so that the LED (excitation) light is directly irradiated to the wavelength conversion unit 20 (in the figure, the solid arrow a indicates the LED excitation light and the dotted line). Arrow b indicates wavelength-converted light). In the configuration of FIG. 1, the housing 10 is formed of, for example, a hood having a V-shaped cross section, and an opening 11 is provided on the bottom surface of the hood. A cylindrical rotating body 21 in which a plurality of wavelength conversion members 23 a, 23 b, 23 c is formed on the outer periphery is rotatably mounted so as to face the opening 11. The wavelength conversion members 23a, 23b, and 23c are switched. Although the support structure of the rotating body 21 is not shown, support members may be provided at both ends of the housing 10 and the rotation shafts 22 at both ends of the rotating body 21 may be rotatably supported on the support member. .

  The inner surface of the housing 10 is preferably formed so as to reduce the reflection loss inside the apparatus by forming the reflection surface 12 with a material having a high reflectance with respect to visible light. The reflecting surface 12 may be specular or diffusive. For example, by applying a silver material on the surface, it is possible to maintain a high reflectance even in a region of a shorter wavelength than visible light, and it has high reflection characteristics with respect to LED light source light and can re-enter the wavelength conversion member. As a result, high luminous efficiency can be realized. Further, it is possible to improve the light emission efficiency by adopting a configuration in which the LED excitation light is selectively reflected on the back surface of the light transmitting member 30 of the housing 10 and a reflective film that transmits visible light is attached. it can. In addition, the inner surface shape of the housing | casing 10 is not specifically limited, Said V shape, a parabola, or U shape can be designed freely.

  The wavelength conversion unit 20 of the light emitting device has a configuration in which a plurality of wavelength conversion members 23 a, 23 b, and 23 c having different wavelength conversion spectra are formed on the outer periphery of the rotating body 21 so as to be substantially equally divided in the circumferential direction. It rotates about the rotation shaft 22. Here, the plurality of wavelength conversion members 23a, 23b, and 23c are all made of a material that emits light when excited by the LED light source emitted from the LED element 1 (wavelength conversion material). The entire portion of the plurality of wavelength conversion members 23a, 23b, 23c exposed to the inside of the housing 10 (exposed portion in the housing) has a surface area equal to or larger than the surface area of the shape of the opening 11 (in this case, a rectangular shape). With such a configuration, it is possible to create a desired light color without color unevenness in the opening 11.

In the present embodiment, as a method for forming the wavelength conversion members 23a, 23b, and 23c, phosphors having three types of light emission characteristics of R, G, and B are mixed with a silicone resin to form a thin sheet, which is subjected to surface mirror finishing. It is set as the structure formed on the rotary body 21 which gave. RGB is, for example, blue: BaMgAl ₁₀ O ₁₇ : Eu, green: ZnS: Cu, Al, red: LiEu _0.96 Sm _0.04 W ₂ O ₈ having an excitation range from ultraviolet to near ultraviolet. These peak wavelengths and chromaticity points on the CIExy chromaticity coordinates are approximately blue: 455 nm, (x, y) = (0.15, 0.08), green: 530 nm, (0.28, 0), respectively. .59), red: 614 nm, (0.63, 0.33), and the influence on the chromaticity varies depending on the excitation wavelength of the near-ultraviolet excitation light, but the light in the region connecting these three chromaticity points. Colors can be created freely (see FIG. 16).

  By configuring the wavelength conversion members 23a, 23b, and 23c as described above, even if the light source wavelength is of a single type, the mixing ratio of the RGB phosphors can be changed as long as each phosphor is excited. It is possible to realize a wide range of light colors. For example, red light having a large mixing ratio can be reddish white light, and blue light having a large blue mixing ratio can be pale light. Further, if the red, green, and blue single color conversion materials are used, it is possible to obtain a light color variable illumination device that is red, green, and blue.

  Further, as an example of the present embodiment, a near-ultraviolet LED having an emission wavelength of about 395 nm is used, wavelength conversion materials having different phosphor ratios are used for the wavelength conversion members 23a, 23b, and 23c, and the rotation angle thereof is changed. It is possible to reproduce five colors (daylight color, daylight white, white, warm white, light bulb color) of JIS illumination white color (JISZ9112 (square area), other reference standard IEC60081 (elliptical area)) (see FIG. 16). . FIG. 16 is a diagram showing the relationship between the JIS illumination white and black body locus of CIE 1934xy chromaticity coordinates and the emission color realization range using the RGB phosphor of the first embodiment. From the right, light bulb color, warm white, white, day white, and daylight color areas (JIS) are shown. Further, in FIG. 15, as an example, the excitation light source is an LED having a peak wavelength of 395 (nm), and the phosphors described above are used in a daylight color (about 6200K) and daylight white (about 4800K) obtained by changing the mixing ratio. Shows a warm white (about 3400 K) emission distribution. Furthermore, by using a near-ultraviolet light source exhibiting a blue-violet emission wavelength, an LED sealing material for realizing the excitation of the phosphor and the protection of the element and the improvement of light extraction with respect to the case of using ultraviolet rays, It is possible to suppress deterioration of the wavelength conversion material.

  The light emitting device of the present embodiment can realize a desired light color change with a very simple configuration and an inexpensive configuration as described above, and can also realize illumination white color based on the JIS standard or the like. It is useful as a light-emitting device for an automobile. In addition, the size of the device itself can be reduced by downsizing the package of the semiconductor light emitting element and the wavelength conversion unit. Moreover, in order to be able to realize with a single type of light source instead of a plurality of types of light sources, there is no need to bother with voltage / current control and dimming control as in the case of using multiple types of light sources, and those drive circuits This is a method that can be realized at low cost because it is unnecessary. Furthermore, by adopting a configuration in which the wavelength conversion unit can be exchanged (can also be prepared as a replacement part), it is possible to realize light color changes of various patterns.

  In addition to the method of forming the wavelength conversion unit 20 into the rotating body 21 by forming the resin-mixed phosphor into a sheet as described above, the method of forming by directly applying, spraying, or printing is also the same. The effect of can be obtained. Moreover, in this Embodiment, the surface (outer peripheral surface) of the rotary body 21 is processed into the mirror surface shape of high reflectance for the purpose of raising the conversion efficiency of a wavelength conversion member, and raising visible light reflectance. However, even if it is processed so as to have high reflectivity diffusivity, it is possible to obtain an advantageous effect on the light emission efficiency of the apparatus.

  In addition, the reflection type light emitting method for obtaining the converted light by irradiating the wavelength conversion unit with the LED light source as shown in this embodiment has a high degree of design freedom of the wavelength conversion unit, and is compared with the transmission type shown below. This is a method for realizing high luminous efficiency with little burden of color management, and this method is useful as a color variable method. In the transmission type in which the wavelength conversion unit is irradiated with LED light and the wavelength conversion light is transmissively extracted, if the amount of the phosphor is increased or the thickness of the wavelength conversion member is increased, the light transmittance is reversed. On the other hand, in the reflection type, it is possible to improve the light conversion efficiency more than the direct type by adjusting them. Further, in the transmission type, the wavelength conversion member cannot be made too thick for the above-described reason, and color unevenness is likely to occur due to the nonuniformity of the phosphor mixing degree and the nonuniformity of the thickness of the wavelength conversion member. There are drawbacks. On the other hand, since the thickness of the wavelength conversion member can be kept thick to some extent in the reflective type, color unevenness is unlikely to occur, and the burden on manufacturing management for preventing color unevenness required in the transmissive type is small.

Embodiment 2. FIG.
FIG. 3 is a cross-sectional side view of a light-emitting device showing Embodiment 2 of the present invention, and FIG. 4 is a top view thereof.
In the first embodiment, the example in which the LED package 6 is disposed at the center of the back surface of the light transmitting member 30 has been described. However, in the light emitting device of this embodiment, the LED package 6 is disposed at one upper edge of the housing 10. It is set as the structure arrange | positioned along. An attachment member 40 for attaching the LED package 6 is provided on one upper edge of the housing 10. Other configurations are substantially the same as those of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted. Further, the same reference numerals are used for the same constituent elements in the following embodiments unless otherwise specified.

  As shown in FIG. 3, the mounting member 40 has a mounting surface 41 inclined obliquely downward, and a plurality of single types of LED packages 6 are mounted on the mounting surface 41, and the LED light source light of each LED package 6 Irradiation is performed toward the wavelength conversion unit 20 facing the opening 11 of the housing 10.

  Even in the configuration of the light emitting device as in the present embodiment, it is possible to obtain the same light color variable effect as in the first embodiment. Further, in the case of this embodiment, since lead wires and wiring of the LED package 6 can be concentrated on one side of the housing 10, visible light transmitted through the light transmitting member 30 is not blocked. The improvement in luminous efficiency can be realized.

  In addition, since the mounting member 40 is made of a highly thermally conductive material such as a metal, a heat radiation path for the heat generated from the LED can be secured even when the irradiation surface of the light emitting device is used downward. A color variable light-emitting device with little reduction in efficiency can be obtained.

  Further, as shown in FIG. 3, even if the wavelength conversion member has a small number of divisions such as 23a and 23b, the area ratio of the adjacent wavelength conversion members 23a and 23b irradiated with the LED light is gradually changed according to the rotation angle. As a result, a gentle color conversion between the chromaticity points of the two wavelength conversion members 23a and 23b becomes possible by the change in the mixing ratio of the two light colors. For example, by selecting one of the wavelength conversion members as a material that emits blue and the other as yellow, the color light between the blue and yellow can be easily changed according to the rotation angle. Is possible. On the other hand, even if these wavelength conversion members are further divided into regions in the circumferential direction, a gentle change in the light color according to the rotation angle can also be realized by the color mixing effect of the emission colors of the respective wavelength conversion members. Is possible.

Embodiment 3 FIG.
FIG. 5 is a cross-sectional side view of a light-emitting device showing Embodiment 3 of the present invention, and FIG. 6 is a top view thereof.
The light emitting device of the present embodiment is configured by dividing the wavelength conversion members 23a, 23b, and 23c into regions in the circumferential direction and the axial direction of the rotating body 21, respectively. Here, two wavelength conversion members 23a and 23b adjacent in the axial direction are configured so as to be arranged in, for example, red and green, and at the next rotation angle, the two wavelength conversion members 23b and 23c adjacent to each other are, for example, green. And a blue array.

  In this way, by changing the arrangement and the number of divisions of the plurality of wavelength conversion members in the circumferential direction and the axial direction of the rotating body, it is possible to obtain an illumination light emitting device having a light color variable effect and a color rendering effect due to various color mixing. .

Embodiment 4 FIG.
FIG. 7 is a cross-sectional side view of a light-emitting device showing Embodiment 4 of the present invention.
In the light emitting device of this embodiment, the wavelength conversion member is not formed in a cylindrical shape as in the first to third embodiments, but is formed by the wavelength conversion members 24a, 24b, and 24c each having a concave surface. Then, by fixing these wavelength conversion members 24a, 24b, 24c on the outer peripheral surface of the rotating shaft 22, or on the outer peripheral concave surface of a delta-type rotating body (not shown) having the rotating shaft 22, the wavelength converting portion 20 is comprised so that rotation is possible. Further, by forming the back surfaces of the wavelength conversion members 24a, 24b, and 24c with a highly reflective film having a high reflectance, the LED excitation light reflected by the inner surfaces of the recesses of the wavelength conversion members 24a, 24b, and 24c Since the excitation efficiency due to re-incidence can be increased, it has the effect of improving the light emission efficiency. At this time, the opening width of the opening 11 of the housing 10 and the chord width of each wavelength conversion member are made substantially equal, and the rotation control is performed so that the center of the recess of each wavelength conversion member is positioned at the center of the opening (see FIG. 7). In the example, 0 °, 120 °, 240 °) makes it possible to realize light color variable illumination in which light does not leak from the gap between the opening 11 and the wavelength converter 20, that is, there is no light loss.

Embodiment 5 FIG.
FIG. 8 is a cross-sectional view illustrating a configuration example of the wavelength conversion unit of the light emitting device according to Embodiment 5 of the present invention.
As shown in FIG. 8A, the wavelength conversion unit of the present light emitting device may be configured to fix wavelength conversion members 25a, 25b, and 25c having different wavelength conversion characteristics to the plane part of the triangular prism rotating body 21.
By configuring the wavelength conversion unit of the light emitting device in this manner, it is possible to realize light color variable illumination with no light loss by the same angle rotation control as described above, in addition to the advantage of easily forming the wavelength conversion surface.
Further, as shown in FIG. 8B, the wavelength conversion section is configured such that the material thickness is increased at the center of each wavelength conversion member 26a, 26b, 26c, for example, and wavelength conversion is efficiently performed with respect to the excitation wavelength. It does not matter even if it is the structure which performs.

Embodiment 6 FIG.
FIG. 9 is a cross-sectional side view of a light-emitting device showing Embodiment 6 of the present invention, and FIG. 10 is an enlarged cross-sectional view showing a part of a light transmission member of the light-emitting device.
As shown in FIG. 9, the light emitting device of the present embodiment is a light emitting device including a light transmitting member 30 on the light emitting surface of the housing 10, and the light transmitting member 30 has a light source side surface (back surface). The selective wavelength transmission / reflection material 31 reflects the near ultraviolet region including at least a part of the excitation wavelength region and transmits light in a longer wavelength region. For example, the light transmissive member 30 is made of glass, and a multilayer metal oxide thin film made of titanium oxide or hafnium oxide is provided on the back surface of the glass plate.

  By constructing the light emitting device in this way, it is possible to reflect near-ultraviolet light emitted from the light source and reflected by the wavelength conversion unit directly on the inner surface of the housing without being externally reflected and re-enter the wavelength conversion unit. is there. Therefore, re-wavelength conversion by excitation reflected light can be performed, and it is possible to obtain a light color variable illumination device with high luminous efficiency.

  Further, as shown in FIG. 10, the light emitting device includes a light transmitting member 30 on the light emitting surface of the housing 10, and absorbs near-ultraviolet rays on the back surface or inside of the light transmitting member 30 and has a longer wavelength than that. It is made of a material that transmits the light in the region. For example, a light transmitting member 30 made of a transparent plate is made of acrylic or glass, and a near ultraviolet absorbing material 32 such as acrylic or silicone in which a near ultraviolet absorbing filler 33 based on titanium oxide or zinc oxide is dispersed is provided on the back surface of the transparent plate. A thin film is formed. Alternatively, the light transmitting member 30 is formed by previously dispersing the filler in acrylic itself.

  By configuring the present light emitting device in this way, it is possible to realize illumination light that does not substantially include near ultraviolet rays, and for example, even in the case of use in museum lighting, it is possible to suppress near ultraviolet irradiation to an object to be illuminated. It is possible to obtain an illuminating device that does not cause deterioration due to a short wavelength of an object to be illuminated and can change the light color according to the scene.

Embodiment 7 FIG.
FIG. 11 is a cross-sectional side view of a light-emitting device showing Embodiment 7 of the present invention.
The light emitting device of the present embodiment is configured such that the wavelength conversion unit 20 that is a movable body slides along the opening 11 of the housing 10. Accordingly, in the wavelength conversion unit 20, a plurality of wavelength conversion members 27a, 27b, and 27c having different conversion wavelength spectra are formed continuously and in a planar shape on the surface of the sliding body 28 made of metal, resin, or the like. In the figure, 29 is an operation axis for sliding the wavelength conversion unit 20.

By configuring the light emitting device in this way, it is possible to obtain the same color variable effect as that of the first embodiment.
Furthermore, this structure can make the light emitting device thinner, and since the wavelength conversion portion is planar, there is an advantage that the wavelength conversion member can be easily formed.
Further, by arranging the plurality of wavelength conversion members not only in the sliding direction but also in a direction perpendicular thereto, it is possible to realize light color changes of various patterns as in the third embodiment. is there.

Embodiment 8 FIG.
FIG. 12 is a configuration diagram that enables automatic control of the light emission state of the light emitting device according to Embodiment 8 of the present invention.
The wavelength conversion unit 20 of the light emitting device in the above-described first to seventh embodiments can set the desired light color by the user by manually moving the rotation shaft 22 or the operation shaft 29 mainly. On the other hand, when realizing automatic control of light color, for example, as shown in FIG. 12, a wavelength conversion member position control device 51 such as a stepping motor is attached to a movable shaft (here, the rotation shaft 22), and a main controller such as a microcomputer is used. The control device 50 performs a rotation angle control.
Moreover, it is also possible to provide an LED dimming device 52, dimming the LED element 1 according to the type of wavelength conversion member to be irradiated, and changing the emission intensity according to the emission color.

  As described above, since the light intensity by the wavelength conversion member is strong by using the light emitting device having the light emission state control means, the light intensity of the light emitting device is not dependent on the light color by such a light control method. Can be made constant. Conversely, it is possible to increase the color rendering effect of the illuminated space by the light emitting device by positively adjusting the light intensity according to the light color. Further, by using a timer (not shown) in combination, it is possible to configure as a light emitting device having a color rendering function for changing light color according to time.

Embodiment 9 FIG.
13 and 14 are configuration diagrams of a lighting apparatus showing Embodiment 9 of the present invention. 14A is a top view and FIG. 14B is a side view.
The light emitting device described above can be configured as a light color variable surface light source illumination device using, for example, a light guide.
For example, as shown in FIG. 13, the illumination device is a combination of a light emitting device 60 of the present invention, a light guide 61 and a display plate 62.
In addition, as shown in FIG. 14, the light emitting device 60 of the present invention is incorporated into the casing 63 and the light emitting color variable illumination device can be realized by emitting light through the surface transmission plate 64. it can.

  By configuring this lighting device in this way, the correlated color temperature can be changed manually or automatically according to the time and atmosphere, and as a surface light source, a pseudo-window lighting device, a sign display lamp, and other general effect lighting It can be used as a compact light source device built into a fixture.

  As described above, the present invention can be used as a light emitting device with variable emission color, and has an advantage that it can be used as an indoor or outdoor lighting device, a vehicle lighting device, or a light source for a display device.

1 is a cross-sectional side view of a light-emitting device showing Embodiment 1 of the present invention. The top view of the light-emitting device of FIG. Sectional side view of the light-emitting device showing Embodiment 2 of the present invention. FIG. 4 is a top view of the light emitting device of FIG. 3. Sectional side view of the light-emitting device showing Embodiment 3 of the present invention. FIG. 6 is a top view of the light emitting device of FIG. 5. FIG. 6 is a cross-sectional side view of a light-emitting device showing Embodiment 4 of the present invention. Sectional drawing of the wavelength conversion part of the light-emitting device which shows Embodiment 5 of this invention. Sectional side view of the light-emitting device showing Embodiment 6 of the present invention. Sectional drawing which expands and shows a part of light transmissive member of the light-emitting device of FIG. Sectional side view of the light-emitting device showing Embodiment 7 of the present invention. The block diagram which enables automatic control of the light emission state of the light-emitting device which shows Embodiment 8 of this invention. The block diagram of the illuminating device which shows Embodiment 9 of this invention. The block diagram of the illuminating device which shows Embodiment 9 of this invention. FIG. 6 shows an example of variable light colors in the light emitting device of the present invention. The relationship figure of the luminescent color realization range using the fluorescent substance of Embodiment 1 and the JIS illumination white of a CIE1934xy chromaticity coordinate, and a black-body locus | trajectory.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 LED element, 2 LED board, 3 reflector, 4 sealing resin, 5 electrode, 6 LED package, 7 package mounting part, 10 housing | casing, 11 opening part, 12 reflective surface, 20 wavelength conversion part, 21 rotating body, 22 Rotating shaft, 23, 24, 25, 26, 27 Wavelength converting member, 28 Slider, 29 Operation shaft, 30 Light transmitting member, 31 Selective wavelength transmitting / reflecting material, 32 Near ultraviolet absorbing material, 33 Near ultraviolet absorbing filler, 40 Mounting Member, 41 mounting surface, 50 main control device, 51 wavelength conversion member position control device, 52 LED dimming device, 60 light emitting device, 61 light guide, 62 display plate, 63 casing, 64 surface transmission plate.

Claims (15)

A single type of semiconductor light source that emits short-wavelength light;
The semiconductor light emitting source is incorporated, an opening is provided on the light emitting side from the semiconductor light emitting light source , a light transmitting member is provided on the light emitting side of the housing , and the inner surface is made of a highly reflective material at least in the visible light region. A formed housing;
It is provided so as to be rotatable or slidable so as to face the opening of the casing, and can be converted into visible light by irradiating the light source light of the semiconductor light emitting light source as excitation light. A wavelength conversion unit comprising a plurality of different wavelength conversion members;
A light-emitting device comprising:   The light emitting device according to claim 1, wherein an exposed part in the casing exposed in the opening of the wavelength conversion unit has a surface area equal to or greater than a surface area of the opening.   The light emitting device according to claim 1 or 2, wherein the emission color is changed by changing an area ratio of two or more wavelength conversion members exposed in the opening of the wavelength conversion unit.   The wavelength conversion member of the wavelength conversion unit can realize at least two color lights among daylight color, daylight white, white, warm white, and light bulb color illumination light colors based on JIS standards and the like. 4. The light emitting device according to any one of items 1 to 3.   5. The light emitting device according to claim 1, wherein a back surface of the wavelength conversion member is formed of a material having a high reflectance in a visible light region from a light source wavelength.   6. The light emitting device according to claim 1, wherein the semiconductor light emitting source is a light emitting diode having a peak wavelength in the near ultraviolet region. Wherein the plurality of wavelength conversion member, the light emitting device according to claim 1, characterized in that it is arranged in the circumferential direction and / or axial rotation body. Wherein the plurality of wavelength conversion member, the light emitting device that claim 1, wherein that are arranged in the sliding direction and / or the sliding direction perpendicular to the direction of the sliding body.   9. The light transmitting member comprising a material that reflects a near ultraviolet region including at least a part of an excitation wavelength region and transmits light in a longer wavelength region on a light source side surface of the light transmitting member. The light emitting device according to any one of the above.   The light-emitting device according to claim 1, further comprising a material that absorbs near-ultraviolet rays and transmits light in a longer wavelength region on a light source-side surface or inside of the light transmitting member. .   The wavelength conversion member position control means for controlling the movable shaft of the wavelength conversion section and the main control means for automatically controlling the control state of the wavelength conversion member position control means are provided. The light-emitting device in any one.   The light-emitting device according to claim 11, further comprising a light-modulating unit capable of dimming the semiconductor light-emitting light source in accordance with a wavelength conversion member to be irradiated among the plurality of wavelength conversion members.   An illumination device comprising the light-emitting device according to claim 1.   The illumination device according to claim 13, further comprising a light guide and a display plate.   The lighting device according to claim 13, wherein the light emitting device is provided in a casing having a surface transmission plate.

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