WO2016021675A1 - Lighting device using light-emitting diode - Google Patents

Lighting device using light-emitting diode Download PDF

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Publication number
WO2016021675A1
WO2016021675A1 PCT/JP2015/072309 JP2015072309W WO2016021675A1 WO 2016021675 A1 WO2016021675 A1 WO 2016021675A1 JP 2015072309 W JP2015072309 W JP 2015072309W WO 2016021675 A1 WO2016021675 A1 WO 2016021675A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
emitting diode
light emitting
phosphor
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PCT/JP2015/072309
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French (fr)
Japanese (ja)
Inventor
正生 野口
Original Assignee
株式会社キャラベル
高橋 邦隆
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Application filed by 株式会社キャラベル, 高橋 邦隆 filed Critical 株式会社キャラベル
Publication of WO2016021675A1 publication Critical patent/WO2016021675A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • F21V9/45—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity by adjustment of photoluminescent elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/12—Combinations of only three kinds of elements
    • F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof

Definitions

  • the present invention relates to an illuminating device using a light emitting diode, and more particularly to an illuminating device realized by combining a diode and a phosphor having the property of being excited and emitting light.
  • the first is to package each blue, green, and red light emitting diode and simultaneously emit light to create pseudo white light.
  • the other is a method of placing a yellow phosphor on the upper layer of the blue light-emitting diode, which creates a pseudo-white light by synthesizing the blue component and the yellow component.
  • the latter method which has advantages suitable for a wider range of applications, is now mainstream, and a method for compensating for this color rendering is a problem.
  • the first thought as a method of controlling the color was a method of adjusting each light emitting component of a light emitting diode packaged with the three primary colors according to the application.
  • the light emitting diode since the light emitting diode is structurally expensive, it has not been widely used.
  • a number of light emitting diodes of the three primary colors are arranged on the substrate, and a method of adjusting each component is also adopted, but the structure is not simple and there is also a problem with the uniformity of the illumination color. It is difficult to say that it is generally popular.
  • the following method that can be considered as a method for controlling the color tone is also a method of effectively using phosphors that have been improved.
  • a blue light emitting diode is disposed as a light source, and the phosphor is not integrated with the upper layer, but the phosphor is disposed on another support, so that the relative relationship between the light source and the phosphor
  • a method for realizing a structure that can change the position and adjusting the color of the illumination light has been proposed. According to this method, there is an advantage that no electrical control is required to adjust the color, and the adjustment can be easily performed.
  • Patent Document 3 instead of changing the relative position of the light source and the phosphor, the reflectance for each color component of the reflection sheet of the light guide plate necessary for surface illumination is locally changed and moved. There has been proposed a method for adjusting the color tone by adjusting the color tone. Even in this method, electrical control is not necessary for adjusting the color, and the color can be changed with a relatively simple structure.
  • blue light problem there is an increasing concern about the effect of blue light components on human health, which is collectively referred to as the “blue light problem”.
  • Products such as filters that reduce the color of blue light components are already in widespread use on computer displays, but there is a demand for reducing the color of blue light components in lighting devices that use light-emitting diodes.
  • the present invention has been made in view of such a situation, and in a lighting device using a light emitting diode, a color changing function having sufficiently uniform color and brightness is realized with a simple structure as much as possible. It is an object of the present invention to provide a device that is allowed to operate. Another object of the present invention is to provide a device that can solve the “blue light problem” in a lighting device using a light emitting diode.
  • the present inventors have made an illumination device that allows light from a light source composed of a group of light-emitting diodes to be incident from the side of the light guide plate and emits illumination light from a surface orthogonal to the incident direction.
  • discontinuous phosphor groups are arranged on the light incident surface of the light guide plate, and light emitting diode groups are arranged corresponding to these so that the mutual positional relationship can be changed, thereby allowing light emission to enter the light guide plate. It was found that uniform illumination light with different colors can be obtained by changing the ratio of direct light from the diode group and emission from the fluorescent spot group.
  • an illuminating device that makes light from a light source composed of a light emitting diode group incident from the side of the light guide plate and emits illumination light from a surface orthogonal to the incident direction.
  • a phosphor group that converts the wavelength of light from the light source is discontinuously disposed on at least one light incident surface of the light guide plate, and by changing the position of at least one of the light guide plate or the light emitting diode group,
  • ⁇ 2> The shape of the cross section of the light guide plate parallel to the light incident direction is rectangular, the light emitting diode group is installed in parallel to the phosphor group, and at least one of the light guide plate and the light emitting diode group slides.
  • the cross-sectional shape of the light guide plate parallel to the light incident direction is circular, the phosphor group and the light emitting diode group are arranged on a circumference having the same center as the light guide plate, and the light guide plate
  • ⁇ 4> In an illuminating device that makes light from a light source composed of a light-emitting diode group incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction.
  • An illumination device using a light emitting diode wherein a phosphor group that converts a wavelength component of blue contained in the light source into another wavelength component is disposed on at least one light incident surface of the light guide plate.
  • a phosphor group that converts a wavelength component of blue contained in the light source into another wavelength component is disposed on at least one light incident surface of the light guide plate.
  • ⁇ 6> In an illuminating device that makes light from a light source composed of a light emitting diode group incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction.
  • a phosphor that converts the wavelength component of blue contained in the light source into a wavelength component of green on at least one light incident surface of the light guide plate, and a wavelength component that changes the wavelength component of blue contained in the light source from yellow to red Light emission characterized in that a phosphor group composed of at least two kinds of phosphors for wavelength conversion is arranged in an overlapping manner so that the one that converts the wavelength component from yellow to red is close to the light source Lighting device using diodes.
  • the illuminating device using the light emitting diode of the present invention it is possible to realize illumination capable of changing the color while sufficiently securing the light amount and uniformity with a very simple structure and method. Moreover, according to the illuminating device using the light emitting diode of the present invention, bright white illumination in which the blue light problem is solved can be realized.
  • the figure which compares the structure of the general light emitting diode lighting device and the structure of the lighting device using the light emitting diode of the present invention The figure which shows one Example of the illuminating device using the light emitting diode of this invention.
  • the figure which showed one Example of the illuminating device using the light emitting diode of this invention of FIG. 3 in three dimensions The figure which shows one Example of the illuminating device using the light emitting diode of this invention.
  • the figure which shows one Example of the illuminating device using the light emitting diode of this invention The figure which shows one Example of the illuminating device using the light emitting diode of this invention.
  • the figure which shows one Example of the illuminating device using the light emitting diode of this invention The figure which shows the wavelength spectrum at the time of mixing a fluorescent substance in the illuminating device using the light emitting diode of this invention of FIG.
  • the figure which shows one Example of the illuminating device using the light emitting diode of this invention The figure which shows the wavelength spectrum of the illuminating device using the light emitting diode of this invention of FIG.
  • the figure which shows one Example of the illuminating device using the light emitting diode of this invention The figure which shows one Example of the illuminating device using the light emitting diode of this invention.
  • FIG. 1 (a) schematically shows a cross section of a surface illumination device using a general light guide plate.
  • a light source is disposed on the side of the light guide plate 101.
  • the light guide plate 101 is formed so that the shape or the diffusion pattern continuously changes so that the amount of light emitted to the irradiation surface side is adjusted according to the distance from the light source to be arranged, and the light amount distribution in the illumination surface. Is designed to be uniform.
  • the light source is a light emitting diode
  • the light emitting diode 103 is disposed on the substrate 102.
  • a method in which a yellow phosphor 104 is integrated on a light emitting surface of a blue light emitting diode 103 and pseudo white light is generated by combining blue and yellow has become common.
  • the pseudo white light thus produced enters the light guide plate from the side surface of the light guide plate 101 and is prevented from leaking to the back side by the reflection plate 105 disposed on the back surface of the light guide plate 101.
  • a diffusion plate 106 is disposed on the illumination surface side of the light guide plate 101, and the light amount distribution made uniform to some extent by the light guide plate 101 is further diffused to improve the uniformity.
  • FIG. 1 (b) schematically shows a cross section of a lighting apparatus using the light emitting diode of the present invention.
  • a general structure in which the reflecting plate 112 is disposed on the back side of the light guide plate 111 and the diffusion plate 113 is disposed on the illumination side is employed.
  • the reflection plate 112 and / or the diffusion plate 113 may be integrated with the light guide plate 111 or may be directly formed on the light guide plate 111 by a method such as printing.
  • Light emitted from a light emitting diode 115 such as blue light disposed on the substrate 114 is incident from the side surface of the light guide plate 111, but the phosphor 116 is not integrated with the light emitting diode 115 but on the side surface of the light guide plate 111. It is a feature of the lighting device using the light emitting diode of the present invention to be disposed in the position.
  • the phosphors 116 are discontinuously disposed on the side surfaces of the light guide plate 111, and movable means is provided on at least one of the light emitting diode substrate 114 and the light guide plate 111. Thereby, the covering region of the light emitting diode 115 by the phosphor 116 changes. Therefore, since the ratio of the direct light from the light emitting diode 115 and the light wavelength-converted by the phosphor 116 is changed, these lights are uniformly mixed in the light guide plate 111, and illumination colors having different colors are realized. .
  • the phosphor 116 is a method in which a tape or the like disposed on a transparent support is attached to the side surface of the light guide plate 111, or a method in which a large number of depressions are provided in the side surface of the light guide plate 111 and the phosphor 116 is filled therein Etc., and is fixed at a predetermined position on the side surface of the light guide plate.
  • the light emitting diode 115 may be a white light emitting diode that is integrated with the phosphor itself. In this case, the phosphor 116 is not a yellow phosphor, but orange or red that slightly changes the color of white light. Or a color filter that changes the light transmittance for each wavelength band.
  • FIG. 2 shows a structure in which a light guide plate has a rectangular shape as an embodiment of a lighting device using a light emitting diode of the present invention.
  • a rectangular light guide unit 202 is incorporated and fixed inside the housing 201.
  • the light guide unit 202 has a diffusion structure on the illumination direction side of the light guide plate and a reflection structure on the back side thereof.
  • a phosphor spot group 203 is formed on the side surface (light incident surface) of the light guide unit 202 by a method such as printing or embedding.
  • the phosphor spot group 203 is excited by the radiated light from the light emitting diode group 205, and emits light in a wavelength band that can generate pseudo white light when mixed with the radiated light. With spots. Further, a substrate 204 on which the light emitting diode group 205 is mounted is disposed at a position adjacent to the phosphor spot group 203 so that sufficient excitation light can be supplied. A substrate installation groove 206 is provided in the housing 201 so that the substrate 204 can be slid and adjusted in parallel with the phosphor spot group 203, whereby the direct light component from the light emitting diode group 205 and the phosphor spot group are arranged. The illumination color can be changed by changing the ratio of the light emitting components from 203. When it is necessary to increase the amount of light, a similar structure may be provided on a plurality of side surfaces of the light guide unit 202 as shown in FIG.
  • a phosphor group that converts the wavelength of light from the light source
  • Illumination characterized in that the wavelength distribution of illumination light is changed by discontinuously disposing on at least one light incident surface of the light guide plate and changing the position of at least one of the light guide plate or the light emitting diode group.
  • the light guide plate has a rectangular cross-sectional shape parallel to the light incident direction, the light emitting diode group is installed in a groove parallel to the phosphor group, and the light emitting diode group can slide.
  • a device using a light emitting diode is not limited to a light emitting diode.
  • the illuminating device using the light emitting diode of the present invention shown in FIG. 2 since the same effect can be obtained even if the light guide plate is slid, it may have the following characteristics.
  • a phosphor group that converts the wavelength of light from the light source Illumination characterized in that the wavelength distribution of illumination light is changed by discontinuously disposing on at least one light incident surface of the light guide plate and changing the position of at least one of the light guide plate or the light emitting diode group.
  • FIG. 3 shows a structure in which the light guide plate has a circular shape as another embodiment of the lighting device using the light emitting diode of the present invention.
  • a circular light guide unit 302 is incorporated in the housing 301.
  • a phosphor spot group 303 is formed on a side surface (light incident surface) of the light guide unit 302 by a method such as printing or embedding.
  • a substrate 304 on which the light emitting diode group 305 is mounted is arranged concentrically close enough to supply sufficient excitation light to the phosphor spot group 303. Since the light emitting diode group 305 must be arranged on the circumference, a separate substrate is prepared as shown in FIG. 3, or the substrate is manufactured as a single substrate using a flexible flexible substrate.
  • the light guide unit 302 When the light guide unit 302 is circular, it is structurally easier to change the relative position of the light emitting diode group and the phosphor spot group by rotating the light guide unit 302. Therefore, the light guide unit 302 is rotated toward the reflector side of the light guide unit 302. It is preferable to provide a shaft structure and to provide a hole for housing the rotating shaft on the housing 301 side.
  • FIG. 4 is a three-dimensional view of the structure shown in FIG. 3 as a perspective view.
  • a circular recess is provided in the center of the housing 401, and a diffusion plate 402 is provided on the illumination direction side.
  • a light emitting diode group 403 is installed on the side surface of the circular depression.
  • a circular light guide plate 404 is accommodated in the recess, and a plurality of discontinuous phosphor spot groups 405 are provided on the side surface of the light guide plate 404.
  • a reflection plate 406 is installed on the surface opposite to the irradiation direction of the light guide plate 404, and a rotation shaft 407 is provided at the center thereof.
  • the light guide plate 404, the diffusion plate 402, and the reflection plate 406 may be integrated in advance.
  • a phosphor group that converts the wavelength of light from the light source
  • Illumination characterized in that the wavelength distribution of illumination light is changed by discontinuously disposing on at least one light incident surface of the light guide plate and changing the position of at least one of the light guide plate or the light emitting diode group.
  • the light guide plate has a circular cross-sectional shape parallel to the light incident direction, and the phosphor group and the light emitting diode group are arranged on a circumference having the same center as that of the light guide plate.
  • the structure shown in FIG. 5 may be used.
  • the circular light guide plate 501 has a side surface that is not perpendicular to the irradiation surface and has an angle of 45 to 60 degrees
  • the surface having the reflection plate 502 is the surface having the diffusion plate 503, that is, irradiation. It has a larger radius than the surface.
  • the reflection plate 502 is formed with a radius similar to that of the diffusion plate 503, so that the outer periphery of the light guide plate 501 on the reflection plate side is not covered with the reflection plate.
  • the phosphor spot group 504 is discontinuously formed here. Deploy.
  • the substrate 506 on which the phosphor diode group 505 is mounted can be formed in a planar shape, and therefore a strong substrate material is used. can do.
  • the reflection ring 507 is installed on the outer peripheral slope of the light guide plate 501.
  • the reflection ring 507 may also be integrated with the diffusion plate by a method such as printing.
  • a planar substrate can be used without using a complicated structure as shown in FIG. That is, as shown in FIG. 6, a phosphor spot group 602 is disposed on the side surface of a circular diffusion plate 601, and a ring-shaped substrate 604 is disposed so as to surround the outer periphery thereof. If the side-emitting light emitting diode group 603 is installed on this substrate, irradiation light is generated on the side of the substrate 604, so that it is possible to achieve light entering the diffusion plate 601.
  • the structure to be used is selected in view of the assumed cost and strength.
  • a circular light guide plate 701 can be rotated integrally with the diffusion plate 702 by bonding or the like. In this state, it is housed in the housing 703. At this time, the outer periphery of the diffusion plate 702 or a part thereof, for example, three points at positions rotated by 120 degrees from the center are formed on the circular inner wall of the housing 703. Contact. Further, a rib structure 704 having a smaller radius than the outer periphery of the diffusion plate 702 is provided on the illumination side of the housing 703.
  • the light guide plate 701 and the diffusion plate 702 can rotate inside the housing 703, and the phosphor 705 disposed on the side surface of the light guide plate 701 and the housing 703 side. Since the arranged light emitting diodes 706 are not in contact with each other, they are not worn by friction.
  • the diffuser plate has a larger diameter than the light guide plate, or a part of the diffuser plate protrudes and comes into contact with the inner wall of the housing so that the distance between the phosphor and the light emitting diode can be rotated while being kept constant.
  • a similar structure may be provided on the housing side, that is, a circular recess that accommodates the diffusion plate or a protrusion structure that prevents the diffusion plate from approaching within a certain distance from the inner wall of the housing.
  • a knob hole 707 is provided on the illumination side of the casing 703, and the knob 708 on the illumination side of the diffuser plate protrudes outside the casing through this hole. Accordingly, the color can be adjusted by rotating the diffusion plate 702 and the light guide plate 701 that moves integrally with the diffusion plate 702 while holding the knob 708 with a finger.
  • the knob 708 may be on the back side instead of the lighting side. Since the rotation movable range of the light guide plate 701 is determined by the length of the knob hole 707 in the circumferential direction, it is possible to eliminate a possibility that the light guide plate 701 is rotated more than necessary and causes a failure.
  • the illumination device using the light emitting diode of the present invention as a phosphor group arranged on at least one light incident surface of the light guide plate, wavelength conversion of a blue wavelength component contained in the light source into another wavelength component is performed.
  • the phosphor group that converts the wavelength component of blue contained in the light source into another wavelength component may be a continuous phosphor group or a discontinuous phosphor group.
  • a discontinuous phosphor group it is naturally possible to use it for the construction of an illumination device using the light emitting diode of the present invention from FIG. 2 to FIG. Adopted as appropriate.
  • a green phosphor may be mixed with a yellow or orange phosphor 116. It is done. However, when such mixing is actually performed, there is a problem in that the overall fluorescence intensity is reduced and the illumination becomes dark.
  • FIG. 8A shows a wavelength spectrum 801 having the configuration shown in FIG. 1B.
  • a wavelength spectrum 802 shown in FIG. Not only the blue component near the wavelength of 460 nm but also the component from green to red around the wavelength of 520 nm to 660 nm is reduced.
  • the lighting device using the light emitting diode of the present invention in the basic configuration of the lighting device using the light emitting diode of the present invention shown in FIG. A configuration in which the obtained phosphor layer is divided into two in a direction perpendicular to the incident direction of the light source is adopted as necessary.
  • the light emitted from the light emitting diode 902 toward the side surface of the light guide plate 901 undergoes different wavelength conversion by the phosphor X903 or the phosphor Y904 and enters the light guide plate 901.
  • the phosphor X903 is a yellow or orange color
  • the phosphor Y904 is a green phosphor having a high absorbance with respect to blue
  • the wavelength spectrum is such that the yellow and orange components decrease and the green component increases. Since the phosphor layer is divided into two parts, the component converted into green light does not receive the secondary absorption as described above, so that the blue component is reduced as in the wavelength spectrum 1001 shown in FIG. By increasing the other visible light components, it is possible to realize bright white illumination that solves the blue light problem.
  • the characteristics of the lighting device using the light emitting diode of the present invention shown in FIG. 9 are summarized as follows.
  • a phosphor that converts the wavelength component of blue contained in the light source into a wavelength component of green on at least one light incident surface of the light guide plate, and a wavelength component that changes the wavelength component of blue contained in the light source from yellow to red
  • An illuminating device using a light emitting diode characterized in that phosphor groups composed of at least two types of phosphors for wavelength conversion are arranged so that different types of phosphors do not overlap each other.
  • the phosphor X1103 and the phosphor Y1104 are layered, and the light emitted from the light emitting diode 1102 is always incident on the light guide plate 1101 through these two layers.
  • the phosphor Y1104 transmits blue light without being subjected to wavelength conversion by the phosphor X1103. It absorbs a part of and converts to green.
  • a phosphor group composed of at least two kinds of phosphors for wavelength conversion is arranged in an overlapping manner so that the one that converts the wavelength component from yellow to red is close to the light source Lighting device using diodes.
  • phosphor X903, phosphor Y904, phosphor X1103, and phosphor Y1104 are all continuous phosphor groups.
  • a discontinuous phosphor group may be used.
  • the light emitting diode of the present invention from FIG. 2 to FIG. 7 is used.
  • it can be used for the configuration of the lighting device, and is appropriately adopted as necessary.
  • the lighting device using the light emitting diode of the present invention can be used mainly for applications such as indoor lighting, image processing, and product design examination.

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Abstract

The purpose of the present invention is to provide a lighting device using a light-emitting diode, having as simple a structure as possible, and capable of changing color while ensuring uniformity and light amount. The present invention pertains to a lighting device for receiving incident light, via the side of a light-guide plate, from a light source comprising a light-emitting diode group, and discharging illuminating light from a surface extending straight in the direction of incidence, wherein a discontinuous fluorescent body group is arranged on the incident surface of the light-guide plate, a light-emitting diode group is arranged so as to correspond thereto, and the positional relationships therebetween are changeable, making it possible to achieve uniform illumination of differing colors by changing the ratio of the direct light incident on the light-guide plate from the light-emitting diode group to the emitted light from the fluorescent spot group. In addition, it is possible to achieve bright white light illumination for solving the blue light problem, by using a fluorescent body group for wavelength-converting a blue wavelength component included in the light source to another wavelength component, as the fluorescent body group to be arranged on the one or more incident surfaces of the light-guide plate.

Description

発光ダイオードを利用した照明装置Lighting device using light emitting diode
　本発明は、発光ダイオードを利用した照明装置に関し、特に、ダイオードおよびそれによって励起され発光する性質を有する蛍光体を組み合わせて実現される照明装置に関する。 The present invention relates to an illuminating device using a light emitting diode, and more particularly to an illuminating device realized by combining a diode and a phosphor having the property of being excited and emitting light.
　近年、室内照明用の光源としては、消費電力が従来の蛍光灯よりも少なく、環境に有害な重金属を使用しないという長所を有する発光ダイオードへの移行が急速に進行している。 In recent years, as a light source for indoor lighting, power consumption is less than that of a conventional fluorescent lamp, and a shift to a light emitting diode having an advantage of not using heavy metals harmful to the environment is rapidly progressing.
　発光ダイオードを利用して白色照明光を実現させる方法としては、主に２つの方式が利用されている。１つは青色、緑色、赤色の各発光ダイオードをパッケージ化し、同時に発光させることで疑似白色光を作る方法で、各色の発光強度を制御することにより白色光の色味を自在に変化させることができる反面、構造が複雑で低コスト化しにくいという欠点もある。もう１つは青色発光ダイオードの上層に黄色蛍光体を配置する方法で、青色成分と黄色成分の合成により疑似白色光を作るため構造が単純で低コスト化できる反面、緑色や赤色の成分が不足し、演色性に乏しいという欠点がある。より広範囲の応用に適した長所を有する後者の方式が現在は主流になっており、この演色性を補う方法が課題となっている。 As a method for realizing white illumination light using a light emitting diode, two methods are mainly used. The first is to package each blue, green, and red light emitting diode and simultaneously emit light to create pseudo white light. By controlling the light emission intensity of each color, the color of white light can be changed freely. On the other hand, the structure is complicated and it is difficult to reduce the cost. The other is a method of placing a yellow phosphor on the upper layer of the blue light-emitting diode, which creates a pseudo-white light by synthesizing the blue component and the yellow component. However, there is a drawback of poor color rendering. The latter method, which has advantages suitable for a wider range of applications, is now mainstream, and a method for compensating for this color rendering is a problem.
　上記の演色性の課題を克服するため、さまざまな関連技術が開発されているが、とくに蛍光体の改良は進んできており、暖色系の発光成分を多く有する蛍光体の利用により、高い演色性を謳う照明も普及しつつある。このように蛍光体の改良が進み、さまざまな特性を有するものが実用化されたことにより、今度は照明の用途に応じて光源の色味を変化させられる商品も生み出されるようになった。 Various related technologies have been developed in order to overcome the above color rendering problems. In particular, phosphors have been improved, and high color rendering properties have been achieved by using phosphors having many warm-colored light-emitting components. Lighting is also becoming popular. As the phosphors have been improved in this way, and those having various characteristics have been put into practical use, products that can change the color of the light source according to the use of lighting are now produced.
　発光ダイオードを利用した白色照明において、色味を制御する方法として第一に考えられたのは、三原色をパッケージ化した発光ダイオードの各発光成分を用途に応じて調整する方法であるが、前述のとおりこの発光ダイオードは構造的に高コストであるため、なかなか普及は進んでいない。同様の考え方により、三原色の発光ダイオードを基板上に数多く配置し、各成分を調整する方式も採用されているが、やはり構造は単純ではなく、照明色の均一性にも問題があるため、やはり一般的に普及しているとは言い難い状況になっている。 In white illumination using light emitting diodes, the first thought as a method of controlling the color was a method of adjusting each light emitting component of a light emitting diode packaged with the three primary colors according to the application. As described above, since the light emitting diode is structurally expensive, it has not been widely used. Based on the same concept, a number of light emitting diodes of the three primary colors are arranged on the substrate, and a method of adjusting each component is also adopted, but the structure is not simple and there is also a problem with the uniformity of the illumination color. It is difficult to say that it is generally popular.
　発光ダイオードを利用した白色照明において、色味を制御する方法として次に考えられる方法も、やはり改良が進んだ蛍光体を有効に利用する方法である。例えば、特許文献１、２において、光源として青色発光ダイオードを配置し、その上層に蛍光体を一体化させるのではなく、別の支持体に蛍光体を配置することにより、光源と蛍光体の相対位置を変更できるような構造を実現させ、照明光の色味を調整する方法が提案されている。この方法によれば、色味を調整するために電気的な制御は必要なく、簡便に調整ができるという利点がある。 In white illumination using light-emitting diodes, the following method that can be considered as a method for controlling the color tone is also a method of effectively using phosphors that have been improved. For example, in Patent Documents 1 and 2, a blue light emitting diode is disposed as a light source, and the phosphor is not integrated with the upper layer, but the phosphor is disposed on another support, so that the relative relationship between the light source and the phosphor A method for realizing a structure that can change the position and adjusting the color of the illumination light has been proposed. According to this method, there is an advantage that no electrical control is required to adjust the color, and the adjustment can be easily performed.
　また、特許文献３においては、光源と蛍光体の相対位置を変化させるのではなく、面照明として必要な導光板の反射シートの各色成分に対する反射率を局所的に変化させておき、これを移動させることにより色味を調整する方法が提案されている。この方法でも、やはり色味の調整のために電気的な制御は必要なく、比較的単純な構造で色味を変化させることができる。 In Patent Document 3, instead of changing the relative position of the light source and the phosphor, the reflectance for each color component of the reflection sheet of the light guide plate necessary for surface illumination is locally changed and moved. There has been proposed a method for adjusting the color tone by adjusting the color tone. Even in this method, electrical control is not necessary for adjusting the color, and the color can be changed with a relatively simple structure.
　さらに、最近では青色光成分が人体の健康に与える影響が懸念されることが増えてきており、これは「ブルーライト問題」と総称されている。既にコンピュータディスプレイに青色光成分を減色させるフィルタ等の製品が普及しつつあるが、発光ダイオードを利用した照明装置においても、青色光成分を減色させることが要望されている。 Furthermore, recently, there is an increasing concern about the effect of blue light components on human health, which is collectively referred to as the “blue light problem”. Products such as filters that reduce the color of blue light components are already in widespread use on computer displays, but there is a demand for reducing the color of blue light components in lighting devices that use light-emitting diodes.
特開２００８－１８６７７７号公報JP 2008-186777 A 特開２０１２－９１５５号公報JP 2012-9155 A 特開２０１３－２５８８６号公報JP 2013-25886 A
　以上のように、発光ダイオードを利用した白色照明装置において、簡便な方法で色味を変化させる方法が考案されているが、実用的にはまだ課題が残されている。例えば、光源と蛍光体を分離させて位置調整する方法では、実用上重要となる均一な面照明を実現させるためには光源を二次元的に多数配列させる必要があるうえ、蛍光体の配置パターンも複雑になる。さらに、面内の色の均一性をどのように確保するかも難しい課題である。
　また、導光板を利用する方法では色の均一性については対策しやすいが、反射率を変えることにより色の波長成分を変化させるため、光エネルギーを十分に活用できず、照明の明るさに問題が生じる可能性がある。 As described above, in a white lighting device using a light emitting diode, a method for changing the color tone by a simple method has been devised, but there are still problems in practical use. For example, in the method of adjusting the position by separating the light source and the phosphor, it is necessary to arrange a large number of light sources two-dimensionally in order to realize a practically important uniform surface illumination, and the arrangement pattern of the phosphor Is also complicated. In addition, how to ensure in-plane color uniformity is also a difficult task.
In addition, it is easy to take measures against color uniformity with the method using a light guide plate, but since the wavelength component of the color is changed by changing the reflectance, the light energy cannot be fully utilized, and there is a problem with the brightness of the illumination. May occur.
　本発明は、このような状況を鑑みてなされたものであり、発光ダイオードを利用した照明装置において、できるだけ簡便な構造で、色味の均一性と明るさを十分に有する色味変更機能を実現させた装置を提供することを課題とするものである。
　また、本発明は、発光ダイオードを利用した照明装置において、「ブルーライト問題」を解決しうる装置を提供することをもう１つの課題とするものである。 The present invention has been made in view of such a situation, and in a lighting device using a light emitting diode, a color changing function having sufficiently uniform color and brightness is realized with a simple structure as much as possible. It is an object of the present invention to provide a device that is allowed to operate.
Another object of the present invention is to provide a device that can solve the “blue light problem” in a lighting device using a light emitting diode.
　本発明者らは、上記課題を解決すべく検討した結果、発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、導光板の光入射面に不連続な蛍光体群を配置するとともに、これらに対応させて発光ダイオード群を配置し、相互の位置関係を変更可能とすることにより、導光板に入射させる発光ダイオード群からの直接光と蛍光スポット群からの発光の比率を変更し、色味の異なる均一な照明光を得ることができるという知見を得た。 As a result of studying the above-described problems, the present inventors have made an illumination device that allows light from a light source composed of a group of light-emitting diodes to be incident from the side of the light guide plate and emits illumination light from a surface orthogonal to the incident direction. In this case, discontinuous phosphor groups are arranged on the light incident surface of the light guide plate, and light emitting diode groups are arranged corresponding to these so that the mutual positional relationship can be changed, thereby allowing light emission to enter the light guide plate. It was found that uniform illumination light with different colors can be obtained by changing the ratio of direct light from the diode group and emission from the fluorescent spot group.
　また、発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置について、更に検討を進めた結果、前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を他の波長成分に波長変換させる蛍光体群を配置することにより、ブルーライト問題を解決して、明るい白色照明を実現させることができるという知見も得た。 Further, as a result of further investigation on an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction, as a result of at least the light guide plate By arranging a phosphor group that converts the wavelength component of blue contained in the light source into another wavelength component on one light incident surface, the blue light problem can be solved and bright white illumination can be realized. The knowledge that it was possible was also obtained.
　本発明はこれらの知見に基づいて完成に至ったものであり、本発明によれば、以下の発明が提供される。
〈１〉発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
　前記光源からの光を波長変換する蛍光体群を、前記導光板の少なくとも１つの光入射面に不連続に配置し、前記導光板又は前記発光ダイオード群の少なくとも一方の位置を変更することにより、照明光の波長分布を変更させることを特徴とする発光ダイオードを利用した照明装置。
〈２〉前記導光板の光の入射方向に平行な断面の形状が長方形であり、前記発光ダイオー群を前記蛍光体群に平行に設置し、前記導光板及び前記発光ダイオード群の少なくとも一方がスライドできる構造としたことを特徴とする上記〈１〉に記載の発光ダイオードを利用した照明装置。
〈３〉前記導光板の光の入射方向に平行な断面の形状が円形であり、前記蛍光体群及び前記発光ダイオード群をそれぞれ導光板と同じ中心を有する円周上に配置し、導光板が当該中心を軸として回転できる構造としたことを特徴とする上記〈１〉に記載の発光ダイオードを利用した照明装置。
〈４〉発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
　前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を他の波長成分に波長変換する蛍光体群を配置したことを特徴とする発光ダイオードを利用した照明装置。
〈５〉発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
　前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を緑色の波長成分に波長変換する蛍光体と前記光源に含まれる青色の波長成分を黄色から赤色に至る波長成分に波長変換する蛍光体との少なくとも二種類から構成された蛍光体群を、種類の異なる蛍光体が互いに重ならないように配置したことを特徴とする発光ダイオードを利用した照明装置。
〈６〉発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
　前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を緑色の波長成分に波長変換する蛍光体と前記光源に含まれる青色の波長成分を黄色から赤色に至る波長成分に波長変換する蛍光体との少なくとも二種類から構成された蛍光体群を、前記黄色から赤色に至る波長成分に変換させるものが光源に近くなるように重層して配置したことを特徴とする発光ダイオードを利用した照明装置。 The present invention has been completed based on these findings, and according to the present invention, the following inventions are provided.
<1> In an illuminating device that makes light from a light source composed of a light emitting diode group incident from the side of the light guide plate and emits illumination light from a surface orthogonal to the incident direction.
A phosphor group that converts the wavelength of light from the light source is discontinuously disposed on at least one light incident surface of the light guide plate, and by changing the position of at least one of the light guide plate or the light emitting diode group, An illumination device using a light emitting diode, wherein the wavelength distribution of illumination light is changed.
<2> The shape of the cross section of the light guide plate parallel to the light incident direction is rectangular, the light emitting diode group is installed in parallel to the phosphor group, and at least one of the light guide plate and the light emitting diode group slides. A lighting device using the light-emitting diode according to <1>, wherein the light-emitting diode has a structure that can be used.
<3> The cross-sectional shape of the light guide plate parallel to the light incident direction is circular, the phosphor group and the light emitting diode group are arranged on a circumference having the same center as the light guide plate, and the light guide plate The illumination device using the light-emitting diode according to <1>, wherein the light-emitting diode is configured to be rotatable about the center.
<4> In an illuminating device that makes light from a light source composed of a light-emitting diode group incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction.
An illumination device using a light emitting diode, wherein a phosphor group that converts a wavelength component of blue contained in the light source into another wavelength component is disposed on at least one light incident surface of the light guide plate.
<5> In an illuminating device that makes light from a light source composed of a light emitting diode group incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction.
A phosphor that converts the wavelength component of blue contained in the light source into a wavelength component of green on at least one light incident surface of the light guide plate, and a wavelength component that changes the wavelength component of blue contained in the light source from yellow to red An illuminating device using a light emitting diode, wherein a phosphor group composed of at least two types of phosphors for wavelength conversion is arranged so that different types of phosphors do not overlap each other.
<6> In an illuminating device that makes light from a light source composed of a light emitting diode group incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction.
A phosphor that converts the wavelength component of blue contained in the light source into a wavelength component of green on at least one light incident surface of the light guide plate, and a wavelength component that changes the wavelength component of blue contained in the light source from yellow to red Light emission characterized in that a phosphor group composed of at least two kinds of phosphors for wavelength conversion is arranged in an overlapping manner so that the one that converts the wavelength component from yellow to red is close to the light source Lighting device using diodes.
　本発明の発光ダイオードを利用した照明装置によれば、非常に簡単な構造と方法で、光量と均一性を十分に確保しつつ色味の変更が可能な照明を実現させることができる。
　また、本発明の発光ダイオードを利用した照明装置によれば、ブルーライト問題の解決した明るい白色照明を実現させることができる。 According to the illuminating device using the light emitting diode of the present invention, it is possible to realize illumination capable of changing the color while sufficiently securing the light amount and uniformity with a very simple structure and method.
Moreover, according to the illuminating device using the light emitting diode of the present invention, bright white illumination in which the blue light problem is solved can be realized.
一般的な発光ダイオード照明装置の構造と本発明の発光ダイオードを利用した照明装置の構造を比較する図The figure which compares the structure of the general light emitting diode lighting device and the structure of the lighting device using the light emitting diode of the present invention 本発明の発光ダイオードを利用した照明装置の一実施例を示す図The figure which shows one Example of the illuminating device using the light emitting diode of this invention. 本発明の発光ダイオードを利用した照明装置の一実施例を示す図The figure which shows one Example of the illuminating device using the light emitting diode of this invention. 図３の本発明の発光ダイオードを利用した照明装置の一実施例を立体的に示した図The figure which showed one Example of the illuminating device using the light emitting diode of this invention of FIG. 3 in three dimensions 本発明の発光ダイオードを利用した照明装置の一実施例を示す図The figure which shows one Example of the illuminating device using the light emitting diode of this invention. 本発明の発光ダイオードを利用した照明装置の一実施例を示す図The figure which shows one Example of the illuminating device using the light emitting diode of this invention. 本発明の発光ダイオードを利用した照明装置の一実施例を示す図The figure which shows one Example of the illuminating device using the light emitting diode of this invention. 図１の本発明の発光ダイオードを利用した照明装置において蛍光体の混合を行った場合の波長スペクトルを示す図The figure which shows the wavelength spectrum at the time of mixing a fluorescent substance in the illuminating device using the light emitting diode of this invention of FIG. 本発明の発光ダイオードを利用した照明装置の一実施例を示す図The figure which shows one Example of the illuminating device using the light emitting diode of this invention. 図９の本発明の発光ダイオードを利用した照明装置の波長スペクトルを示す図The figure which shows the wavelength spectrum of the illuminating device using the light emitting diode of this invention of FIG. 本発明の発光ダイオードを利用した照明装置の一実施例を示す図The figure which shows one Example of the illuminating device using the light emitting diode of this invention.
　本発明の発光ダイオードを利用した照明装置について、以下図を用いて詳細に説明する。 The lighting device using the light emitting diode of the present invention will be described in detail below with reference to the drawings.
　図１(ａ)は、一般的な導光板を利用した面照明装置の断面を模式的に示したものである。一般的には導光板１０１の側面側に光源が配置される。導光板１０１は配置する予定の光源からの距離に応じて照射面側に放出される光量が調整されるように形状あるいは拡散パターンが連続的に変化するように形成され、照光面内で光量分布が均一になるように工夫されているものである。光源が発光ダイオードの場合、基板１０２上に発光ダイオード１０３が配置される。前述のとおり、最近では青色の発光ダイオード１０３の発光面上に黄色の蛍光体１０４が一体化され、青色と黄色の合成で疑似白色光が作られる方式が一般的になっている。このように作られた疑似白色光は、導光板１０１の側面から導光板内に侵入し、導光板１０１の背面に配置された反射板１０５によって背面側に漏出することを防止される。導光板１０１の照明面側には拡散板１０６が配置され、導光板１０１によってある程度均一化された光量分布が、さらに拡散されて均一性が高められるようになっている。 FIG. 1 (a) schematically shows a cross section of a surface illumination device using a general light guide plate. In general, a light source is disposed on the side of the light guide plate 101. The light guide plate 101 is formed so that the shape or the diffusion pattern continuously changes so that the amount of light emitted to the irradiation surface side is adjusted according to the distance from the light source to be arranged, and the light amount distribution in the illumination surface. Is designed to be uniform. When the light source is a light emitting diode, the light emitting diode 103 is disposed on the substrate 102. As described above, recently, a method in which a yellow phosphor 104 is integrated on a light emitting surface of a blue light emitting diode 103 and pseudo white light is generated by combining blue and yellow has become common. The pseudo white light thus produced enters the light guide plate from the side surface of the light guide plate 101 and is prevented from leaking to the back side by the reflection plate 105 disposed on the back surface of the light guide plate 101. A diffusion plate 106 is disposed on the illumination surface side of the light guide plate 101, and the light amount distribution made uniform to some extent by the light guide plate 101 is further diffused to improve the uniformity.
　一方、図１(ｂ)は、本発明の発光ダイオードを利用した照明装置の断面を模式的に示したものである。この場合も導光板１１１の背面側に反射板１１２、照明側に拡散板１１３が配置される一般的な構造を採用する。反射板１１２および／または拡散板１１３は、導光板１１１と一体化している、あるいは印刷等の方法により導光板１１１上に直接形成されていてもよい。導光板１１１の側面から、基板１１４上に配置された青色などの発光ダイオード１１５からの放出光を入射させるが、蛍光体１１６は発光ダイオード１１５と一体化させるのではなく、導光板１１１の側面上に配置することが本発明の発光ダイオードを利用した照明装置の特徴である。 On the other hand, FIG. 1 (b) schematically shows a cross section of a lighting apparatus using the light emitting diode of the present invention. In this case as well, a general structure in which the reflecting plate 112 is disposed on the back side of the light guide plate 111 and the diffusion plate 113 is disposed on the illumination side is employed. The reflection plate 112 and / or the diffusion plate 113 may be integrated with the light guide plate 111 or may be directly formed on the light guide plate 111 by a method such as printing. Light emitted from a light emitting diode 115 such as blue light disposed on the substrate 114 is incident from the side surface of the light guide plate 111, but the phosphor 116 is not integrated with the light emitting diode 115 but on the side surface of the light guide plate 111. It is a feature of the lighting device using the light emitting diode of the present invention to be disposed in the position.
　蛍光体１１６は、導光板１１１の側面に不連続に配置され、発光ダイオードの基板１１４または導光板１１１の少なくとも一方に可動手段が備えられている。これにより、蛍光体１１６による発光ダイオード１１５の被覆領域が変化する。したがって、発光ダイオード１１５からの直接光と蛍光体１１６によって波長変換された光の比率が変化するため、これらの光が導光板１１１内で均一に混合され、色味の異なる照明色が実現される。蛍光体１１６はテープなどの透明支持体上に配置されたものを導光板１１１の側面に貼り付ける方法や、導光板１１１の側面に多数の窪みを設けてその内部に蛍光体１１６を充填する方法等を用いて、導光板側面の所定の位置に固定される。なお、発光ダイオード１１５はそれ自体が蛍光体と一体化した白色発光ダイオードであってもよく、この場合は蛍光体１１６は黄色蛍光体ではなく、白色光の色味を多少変化させるオレンジ色、赤色等の蛍光体や、あるいは波長帯ごとに光線透過率を変化させるカラーフィルタのようなものであってもよい。 The phosphors 116 are discontinuously disposed on the side surfaces of the light guide plate 111, and movable means is provided on at least one of the light emitting diode substrate 114 and the light guide plate 111. Thereby, the covering region of the light emitting diode 115 by the phosphor 116 changes. Therefore, since the ratio of the direct light from the light emitting diode 115 and the light wavelength-converted by the phosphor 116 is changed, these lights are uniformly mixed in the light guide plate 111, and illumination colors having different colors are realized. . The phosphor 116 is a method in which a tape or the like disposed on a transparent support is attached to the side surface of the light guide plate 111, or a method in which a large number of depressions are provided in the side surface of the light guide plate 111 and the phosphor 116 is filled therein Etc., and is fixed at a predetermined position on the side surface of the light guide plate. The light emitting diode 115 may be a white light emitting diode that is integrated with the phosphor itself. In this case, the phosphor 116 is not a yellow phosphor, but orange or red that slightly changes the color of white light. Or a color filter that changes the light transmittance for each wavelength band.
　図２は、本発明の発光ダイオードを利用した照明装置の一実施例として、導光板が長方形の形状になっている構造を示したものである。この例では、筐体２０１の内部に長方形の導光ユニット２０２が組み込み固定されている。導光ユニット２０２は図１で説明したように、導光板の照明方向側に拡散構造、その背面側に反射構造を有するものである。導光ユニット２０２の側面（入光面）には蛍光体スポット群２０３が印刷あるいは埋入等の方法により形成されている。蛍光体スポット群２０３は、発光ダイオード群２０５からの放射光によって励起され、当該放射光と混合されることにより疑似白色光を生成できるような波長帯の発光を生じるものであり、不連続な複数のスポットを有する。さらに蛍光体スポット群２０３に十分な励起光を供給できる程度に隣接する位置に、発光ダイオード群２０５を搭載した基板２０４が配置される。蛍光体スポット群２０３に対し、基板２０４が平行にスライド調整できるように基板設置溝２０６が筐体２０１内に設けられており、これによって発光ダイオード群２０５からの直接光成分と、蛍光体スポット群２０３からの発光成分の比率を変化させ、照明色を変化させることができる。光量を高める必要がある場合には、図２に示すように、導光ユニット２０２の複数の側面に同様の構造を設ければよい。 FIG. 2 shows a structure in which a light guide plate has a rectangular shape as an embodiment of a lighting device using a light emitting diode of the present invention. In this example, a rectangular light guide unit 202 is incorporated and fixed inside the housing 201. As described with reference to FIG. 1, the light guide unit 202 has a diffusion structure on the illumination direction side of the light guide plate and a reflection structure on the back side thereof. A phosphor spot group 203 is formed on the side surface (light incident surface) of the light guide unit 202 by a method such as printing or embedding. The phosphor spot group 203 is excited by the radiated light from the light emitting diode group 205, and emits light in a wavelength band that can generate pseudo white light when mixed with the radiated light. With spots. Further, a substrate 204 on which the light emitting diode group 205 is mounted is disposed at a position adjacent to the phosphor spot group 203 so that sufficient excitation light can be supplied. A substrate installation groove 206 is provided in the housing 201 so that the substrate 204 can be slid and adjusted in parallel with the phosphor spot group 203, whereby the direct light component from the light emitting diode group 205 and the phosphor spot group are arranged. The illumination color can be changed by changing the ratio of the light emitting components from 203. When it is necessary to increase the amount of light, a similar structure may be provided on a plurality of side surfaces of the light guide unit 202 as shown in FIG.
　以上、図２に示す本発明の発光ダイオードを利用した照明装置の一実施例の特徴をまとめると、次のようになる。
　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、前記光源からの光を波長変換する蛍光体群を、前記導光板の少なくとも１つの光入射面に不連続に配置し、前記導光板又は前記発光ダイオード群の少なくとも一方の位置を変更することにより、照明光の波長分布を変更させることを特徴とする照明装置であって、前記導光板の光の入射方向に平行な断面の形状が長方形であり、前記発光ダイオー群を前記蛍光体群に平行な溝に設置し、前記発光ダイオード群がスライドできる構造を有する発光ダイオードを利用した装置。 The characteristics of the embodiment of the lighting device using the light emitting diode of the present invention shown in FIG. 2 are summarized as follows.
In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction, a phosphor group that converts the wavelength of light from the light source, Illumination characterized in that the wavelength distribution of illumination light is changed by discontinuously disposing on at least one light incident surface of the light guide plate and changing the position of at least one of the light guide plate or the light emitting diode group. The light guide plate has a rectangular cross-sectional shape parallel to the light incident direction, the light emitting diode group is installed in a groove parallel to the phosphor group, and the light emitting diode group can slide. A device using a light emitting diode.
　なお、図２に示す本発明の発光ダイオードを利用した照明装置では、導光板の方をスライドしても同様の効果が得られるため、次のような特徴を有するものであってもよい。
　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、前記光源からの光を波長変換する蛍光体群を、前記導光板の少なくとも１つの光入射面に不連続に配置し、前記導光板又は前記発光ダイオード群の少なくとも一方の位置を変更することにより、照明光の波長分布を変更させることを特徴とする照明装置であって、前記導光板の照射光の出射方向に平行な断面の形状が長方形であり、導光板を当該断面に平行な方向にスライドできる構造を有する発光ダイオードを利用した装置。 In addition, in the illuminating device using the light emitting diode of the present invention shown in FIG. 2, since the same effect can be obtained even if the light guide plate is slid, it may have the following characteristics.
In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction, a phosphor group that converts the wavelength of light from the light source, Illumination characterized in that the wavelength distribution of illumination light is changed by discontinuously disposing on at least one light incident surface of the light guide plate and changing the position of at least one of the light guide plate or the light emitting diode group. An apparatus using a light emitting diode, wherein the light guide plate has a rectangular cross-sectional shape parallel to an emission direction of irradiation light, and the light guide plate can be slid in a direction parallel to the cross section.
　図３は、本発明の発光ダイオードを利用した照明装置の別の一実施例として、導光板が円形の形状になっている構造を示したものである。この例では、筐体３０１の内部に円形の導光ユニット３０２が組み込まれている。導光ユニット３０２の側面（入光面）には蛍光体スポット群３０３が印刷あるいは埋入等の方法により形成されている。さらに蛍光体スポット群３０３に十分な励起光を供給できる程度に近接した同心円状に、発光ダイオード群３０５を搭載した基板３０４が配置される。発光ダイオード群３０５は円周上に配置されなければならないため、図３のように別々の基板を用意するか、柔軟なフレキシブル基板を利用して一枚の基板として製作される。導光ユニット３０２が円形である場合、こちらを回転させることにより発光ダイオード群と蛍光体スポット群の相対位置を変更する方が構造的に容易であるため、導光ユニット３０２の反射板側に回転軸構造を設け、筐体３０１側にこの回転軸を収容する穴を設けるのがよい。 FIG. 3 shows a structure in which the light guide plate has a circular shape as another embodiment of the lighting device using the light emitting diode of the present invention. In this example, a circular light guide unit 302 is incorporated in the housing 301. A phosphor spot group 303 is formed on a side surface (light incident surface) of the light guide unit 302 by a method such as printing or embedding. Further, a substrate 304 on which the light emitting diode group 305 is mounted is arranged concentrically close enough to supply sufficient excitation light to the phosphor spot group 303. Since the light emitting diode group 305 must be arranged on the circumference, a separate substrate is prepared as shown in FIG. 3, or the substrate is manufactured as a single substrate using a flexible flexible substrate. When the light guide unit 302 is circular, it is structurally easier to change the relative position of the light emitting diode group and the phosphor spot group by rotating the light guide unit 302. Therefore, the light guide unit 302 is rotated toward the reflector side of the light guide unit 302. It is preferable to provide a shaft structure and to provide a hole for housing the rotating shaft on the housing 301 side.
　図４は、図３に示す構造を斜視図として立体的に示したものである。筐体４０１の中央に円形の窪みが設けられ、照明方向側は拡散板４０２を有している。また、この円形の窪みの側面には発光ダイオード群４０３が設置されている。この窪みに円形の導光板４０４を収容するが、導光板４０４の側面には不連続な複数の蛍光体スポット群４０５が設置されている。さらに、導光板４０４の照射方向とは逆の面に反射板４０６が設置され、さらにその中心に回転軸４０７が設けられている。なお、導光板４０４と拡散板４０２および反射板４０６は、あらかじめ一体化されていてもよい。 FIG. 4 is a three-dimensional view of the structure shown in FIG. 3 as a perspective view. A circular recess is provided in the center of the housing 401, and a diffusion plate 402 is provided on the illumination direction side. A light emitting diode group 403 is installed on the side surface of the circular depression. A circular light guide plate 404 is accommodated in the recess, and a plurality of discontinuous phosphor spot groups 405 are provided on the side surface of the light guide plate 404. Further, a reflection plate 406 is installed on the surface opposite to the irradiation direction of the light guide plate 404, and a rotation shaft 407 is provided at the center thereof. The light guide plate 404, the diffusion plate 402, and the reflection plate 406 may be integrated in advance.
　以上、図３に示す本発明の発光ダイオードを利用した照明装置の一実施例の特徴をまとめると、次のようになる。
　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、前記光源からの光を波長変換する蛍光体群を、前記導光板の少なくとも１つの光入射面に不連続に配置し、前記導光板又は前記発光ダイオード群の少なくとも一方の位置を変更することにより、照明光の波長分布を変更させることを特徴とする照明装置であって、前記導光板の光の入射方向に平行な断面の形状が円形であり、前記蛍光体群及び前記発光ダイオード群をそれぞれ導光板と同じ中心を有する円周上に配置し、導光板が当該中心を軸として回転できる構造を有する発光ダイオードを利用した照明装置。 The characteristics of the embodiment of the lighting device using the light emitting diode of the present invention shown in FIG. 3 are summarized as follows.
In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction, a phosphor group that converts the wavelength of light from the light source, Illumination characterized in that the wavelength distribution of illumination light is changed by discontinuously disposing on at least one light incident surface of the light guide plate and changing the position of at least one of the light guide plate or the light emitting diode group. The light guide plate has a circular cross-sectional shape parallel to the light incident direction, and the phosphor group and the light emitting diode group are arranged on a circumference having the same center as that of the light guide plate. An illumination device using a light-emitting diode having a structure in which a light plate can rotate around the center.
　なお、図３のように円形の拡散板を利用する方式において、発光ダイオードを搭載する基板には強度が求められる場合には、図５のような構造を利用してもよい。図５において、円形の導光板５０１は側面が照射面に対して垂直ではなく、４５乃至６０度の角度を有しており、反射板５０２を有する面が、拡散板５０３を有する面、すなわち照射面よりも大きな半径を有している。反射板５０２は拡散板５０３と同程度の半径で形成することにより、導光板５０１の反射板側の外周は反射板に覆われない状態になるが、ここに蛍光体スポット群５０４を不連続に配置する。さらに、これらの蛍光体スポット群５０４を十分に励起できる位置に発光ダイオード群５０５を円周上に配置すれば、これらを搭載する基板５０６は平面状に形成できるため、強度のある基板材料を使用することができる。なお、このままでは発光成分が導光板５０１の周辺から漏出してしまうため、導光板５０１の外周斜面に反射リング５０７を設置する。この反射リング５０７も、印刷等の方法により拡散板に一体化させてもよい。 In the system using a circular diffusion plate as shown in FIG. 3, if the substrate on which the light emitting diode is mounted requires strength, the structure shown in FIG. 5 may be used. In FIG. 5, the circular light guide plate 501 has a side surface that is not perpendicular to the irradiation surface and has an angle of 45 to 60 degrees, and the surface having the reflection plate 502 is the surface having the diffusion plate 503, that is, irradiation. It has a larger radius than the surface. The reflection plate 502 is formed with a radius similar to that of the diffusion plate 503, so that the outer periphery of the light guide plate 501 on the reflection plate side is not covered with the reflection plate. However, the phosphor spot group 504 is discontinuously formed here. Deploy. Furthermore, if the light emitting diode group 505 is arranged on the circumference at a position where the phosphor spot group 504 can be sufficiently excited, the substrate 506 on which the phosphor diode group 505 is mounted can be formed in a planar shape, and therefore a strong substrate material is used. can do. In this case, since the light emitting component leaks from the periphery of the light guide plate 501, the reflection ring 507 is installed on the outer peripheral slope of the light guide plate 501. The reflection ring 507 may also be integrated with the diffusion plate by a method such as printing.
　また、発光ダイオードとして上面が発光するのではなく、側面が発光するものを利用すれば、図５のような複雑な構造を利用しなくとも、平面状の基板を使用できる。すなわち図６に示すように、円形の拡散板６０１の側面に蛍光体スポット群６０２を配置し、その外周を囲むようにリング状基板６０４を配置する。この基板上に側面発光型発光ダイオード群６０３を設置すれば、基板６０４の側方に照射光が発生するため、拡散板６０１内への入光は実現できる。どのような構造を利用するかは、想定されるコストと強度を鑑みて選択されることになる。 Further, if a light emitting diode that emits light from the side instead of light from the top surface is used, a planar substrate can be used without using a complicated structure as shown in FIG. That is, as shown in FIG. 6, a phosphor spot group 602 is disposed on the side surface of a circular diffusion plate 601, and a ring-shaped substrate 604 is disposed so as to surround the outer periphery thereof. If the side-emitting light emitting diode group 603 is installed on this substrate, irradiation light is generated on the side of the substrate 604, so that it is possible to achieve light entering the diffusion plate 601. The structure to be used is selected in view of the assumed cost and strength.
　最後に、導光板が円形であり、導光板を回転させることによって色味を調整するためのより具体的な構造の一例について、図７を用いて説明する。図７において円形の導光板７０１は拡散板７０２と接着等の方法により一体化して回転できるようになっている。この状態で筐体７０３の内部に収容されるが、このとき拡散板７０２の外周あるいはその一部、例えば中心から１２０度ずつ回転させた位置にある３点等が筐体７０３の円形の内壁に接触する。さらに、筐体７０３の照光側には拡散板７０２の外周よりも半径の小さいリブ構造７０４が設けられている。このような構造であれば、導光板７０１および拡散板７０２は筐体７０３の内部を回転することが可能であり、かつ、導光板７０１の側面に配置された蛍光体７０５と筐体７０３側に配置された発光ダイオード７０６は接触しないため、摩擦による損耗を受けない。なお、図７では導光板よりも拡散板の方が直径が大きい、あるいは一部が突出して筐体内壁に接触することにより、蛍光体と発光ダイオードの距離が一定に保たれつつ回転できるようになっているが、筐体側に同様の構造、すなわち拡散板を収容する円形の窪みや筐体内壁から拡散板を一定距離以内に近づけないための突起構造が設けられていてもよい。 Finally, an example of a more specific structure for adjusting the color by rotating the light guide plate when the light guide plate is circular will be described with reference to FIG. In FIG. 7, a circular light guide plate 701 can be rotated integrally with the diffusion plate 702 by bonding or the like. In this state, it is housed in the housing 703. At this time, the outer periphery of the diffusion plate 702 or a part thereof, for example, three points at positions rotated by 120 degrees from the center are formed on the circular inner wall of the housing 703. Contact. Further, a rib structure 704 having a smaller radius than the outer periphery of the diffusion plate 702 is provided on the illumination side of the housing 703. With such a structure, the light guide plate 701 and the diffusion plate 702 can rotate inside the housing 703, and the phosphor 705 disposed on the side surface of the light guide plate 701 and the housing 703 side. Since the arranged light emitting diodes 706 are not in contact with each other, they are not worn by friction. In FIG. 7, the diffuser plate has a larger diameter than the light guide plate, or a part of the diffuser plate protrudes and comes into contact with the inner wall of the housing so that the distance between the phosphor and the light emitting diode can be rotated while being kept constant. However, a similar structure may be provided on the housing side, that is, a circular recess that accommodates the diffusion plate or a protrusion structure that prevents the diffusion plate from approaching within a certain distance from the inner wall of the housing.
　さらに、筐体７０３の照明側にはつまみ穴７０７が設けられており、拡散板の照明側のつまみ７０８はこの穴を通して筐体の外部に突出している。したがって、つまみ７０８を指でつまみながら拡散板７０２およびそれと一体化して動く導光板７０１を回転させて、色味を調整することができる。なお、照明装置が壁内に埋め込まれず、吊り下げ等の方法で設置される場合には、つまみ７０８は照明側ではなく背面側にあってもよい。導光板７０１の回転可動範囲はつまみ穴７０７の円周方向の長さで決められるため、必要以上に回転させて故障させてしまう可能性をなくすことができる。 Further, a knob hole 707 is provided on the illumination side of the casing 703, and the knob 708 on the illumination side of the diffuser plate protrudes outside the casing through this hole. Accordingly, the color can be adjusted by rotating the diffusion plate 702 and the light guide plate 701 that moves integrally with the diffusion plate 702 while holding the knob 708 with a finger. When the lighting device is not embedded in the wall and is installed by a method such as hanging, the knob 708 may be on the back side instead of the lighting side. Since the rotation movable range of the light guide plate 701 is determined by the length of the knob hole 707 in the circumferential direction, it is possible to eliminate a possibility that the light guide plate 701 is rotated more than necessary and causes a failure.
　さらに、本発明の発光ダイオードを利用した照明装置においては、前記導光板の少なくとも１つの光入射面に配置する蛍光体群として、前記光源に含まれる青色の波長成分を他の波長成分に波長変換する蛍光体群を用いることにより、ブルーライト問題の解決した明るい白色照明を実現させることができる。この場合、光源に含まれる青色の波長成分を他の波長成分に波長変換する蛍光体群は、連続した蛍光体群であっても、あるいは、不連続な蛍光体群であっても良いことはいうまでもなく、不連続な蛍光体群とする場合においては、図２から図７に至る本発明の発光ダイオードを利用した照明装置の構成に利用することは当然可能であり、必要に応じて適宜採用される。 Furthermore, in the illumination device using the light emitting diode of the present invention, as a phosphor group arranged on at least one light incident surface of the light guide plate, wavelength conversion of a blue wavelength component contained in the light source into another wavelength component is performed. By using the phosphor group, bright white illumination that solves the blue light problem can be realized. In this case, the phosphor group that converts the wavelength component of blue contained in the light source into another wavelength component may be a continuous phosphor group or a discontinuous phosphor group. Needless to say, in the case of a discontinuous phosphor group, it is naturally possible to use it for the construction of an illumination device using the light emitting diode of the present invention from FIG. 2 to FIG. Adopted as appropriate.
　また、ブルーライト問題の解決方法としては、図１(ｂ)で示した本発明の発光ダイオードを利用した照明装置において、黄色またはオレンジ色系の蛍光体１１６に緑色の蛍光体を混ぜることも考えられる。しかしながら、実際にこのような混合を行うと、全体の蛍光強度が低下し、照明が暗くなってしまうという問題がある。図８(a)は図１(b)の構成の波長スペクトル８０１を示したものであるが、蛍光体１１６に緑色蛍光体を混ぜた場合、図８(b)の波長スペクトル８０２のように、波長４６０ｎｍ付近の青色成分だけでなく、波長５２０ｎｍ～６６０ｎｍあたりの緑色から赤色にかけた成分も減少してしまうのである。これは、青色成分が緑色蛍光体に吸収されて緑色光に変換されたものが、さらに黄色またはオレンジ色系の蛍光体に吸収されて、それらの色の成分に再変換されてしまうことによるものと考えられる。このような二次吸収の問題を解決しなければ、青色成分が少なく照明全体は明るいという特徴をもたせることができない。 Further, as a method for solving the blue light problem, in the lighting device using the light emitting diode of the present invention shown in FIG. 1B, a green phosphor may be mixed with a yellow or orange phosphor 116. It is done. However, when such mixing is actually performed, there is a problem in that the overall fluorescence intensity is reduced and the illumination becomes dark. FIG. 8A shows a wavelength spectrum 801 having the configuration shown in FIG. 1B. When a green phosphor is mixed with the phosphor 116, a wavelength spectrum 802 shown in FIG. Not only the blue component near the wavelength of 460 nm but also the component from green to red around the wavelength of 520 nm to 660 nm is reduced. This is because the blue component absorbed into the green phosphor and converted into green light is further absorbed into the yellow or orange phosphor and re-converted into those color components. it is conceivable that. Unless the problem of such secondary absorption is solved, it is not possible to give the feature that the entire illumination is bright with few blue components.
　そこで本発明の発光ダイオードを利用した照明装置においては、図９のように、図１(ｂ)で示した本発明の発光ダイオードを利用した照明装置の基本的な構成において、導光板側面に設けられた蛍光体層を、光源の入射方向に対して垂直な方向に二分割した構成を必要に応じて採用する。これにより、導光板９０１の側面に向けて発光ダイオード９０２から放出された光は、蛍光体Ｘ９０３または蛍光体Ｙ９０４により異なる波長変換を受け、導光板９０１に入射されることになる。例えば発光ダイオード９０２が青色であり、蛍光体Ｘ９０３が黄色またはオレンジ系の色、蛍光体Ｙ９０４が青色に対する吸光度が高い緑色蛍光体であれば、図１(ｂ)の構成と比して青色成分および黄色、オレンジ色成分が減少し、緑色成分が増加したような波長スペクトルとなる。蛍光体層が二分割されていることにより、緑色光に変換された成分が前述したような二次吸収を受けることがないため、図１０に示す波長スペクトル１００１のように、青色成分が減少し、その他の可視光成分は増加することで、ブルーライト問題の解決した明るい白色照明を実現させることができるのである。 Therefore, in the lighting device using the light emitting diode of the present invention, as shown in FIG. 9, in the basic configuration of the lighting device using the light emitting diode of the present invention shown in FIG. A configuration in which the obtained phosphor layer is divided into two in a direction perpendicular to the incident direction of the light source is adopted as necessary. As a result, the light emitted from the light emitting diode 902 toward the side surface of the light guide plate 901 undergoes different wavelength conversion by the phosphor X903 or the phosphor Y904 and enters the light guide plate 901. For example, if the light emitting diode 902 is blue, the phosphor X903 is a yellow or orange color, and the phosphor Y904 is a green phosphor having a high absorbance with respect to blue, the blue component and the structure shown in FIG. The wavelength spectrum is such that the yellow and orange components decrease and the green component increases. Since the phosphor layer is divided into two parts, the component converted into green light does not receive the secondary absorption as described above, so that the blue component is reduced as in the wavelength spectrum 1001 shown in FIG. By increasing the other visible light components, it is possible to realize bright white illumination that solves the blue light problem.
　図９に示した本発明の発光ダイオードを利用した照明装置の特徴をまとめると、以下のようになる。
　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
　前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を緑色の波長成分に波長変換する蛍光体と前記光源に含まれる青色の波長成分を黄色から赤色に至る波長成分の波長変換する蛍光体との少なくとも二種類から構成された蛍光体群を、種類の異なる蛍光体は互いに重ならないように配置したことを特徴とする発光ダイオードを利用した照明装置。 The characteristics of the lighting device using the light emitting diode of the present invention shown in FIG. 9 are summarized as follows.
In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction,
A phosphor that converts the wavelength component of blue contained in the light source into a wavelength component of green on at least one light incident surface of the light guide plate, and a wavelength component that changes the wavelength component of blue contained in the light source from yellow to red An illuminating device using a light emitting diode, characterized in that phosphor groups composed of at least two types of phosphors for wavelength conversion are arranged so that different types of phosphors do not overlap each other.
　同様の目的で、本発明の発光ダイオードを利用した照明装置においては、図１１に示すような構成を採用することも可能である。図１１では、蛍光体Ｘ１１０３と蛍光体Ｙ１１０４が重層されており、発光ダイオード１１０２から放出された光は必ずこの二層を通して導光板１１０１に入射されることになる。このとき、発光ダイオード１１０２を青色、蛍光体Ｘ１１０３を黄色またはオレンジ系の色、蛍光体Ｙ１１０４を緑色の蛍光体にすれば、蛍光体Ｙ１１０４は蛍光体Ｘ１１０３により波長変換を受けずに透過した青色光の一部を吸収し、緑色に変換する。一方、先に蛍光体Ｘ１１０３により黄色またはオレンジ色等の長波長成分に変換された光は、それよりも吸収波長の短い蛍光体Ｙ１１０４には吸収されないため、二次吸収の問題はなく導光体１１０１へ入射される。したがって、図１１の構成によっても、青色成分が減少し、緑色以上の長波長成分が増加した明るい白色照明を実現させることができるのである。 For the same purpose, it is also possible to adopt a configuration as shown in FIG. 11 in the lighting device using the light emitting diode of the present invention. In FIG. 11, the phosphor X1103 and the phosphor Y1104 are layered, and the light emitted from the light emitting diode 1102 is always incident on the light guide plate 1101 through these two layers. At this time, if the light emitting diode 1102 is blue, the phosphor X1103 is yellow or orange, and the phosphor Y1104 is a green phosphor, the phosphor Y1104 transmits blue light without being subjected to wavelength conversion by the phosphor X1103. It absorbs a part of and converts to green. On the other hand, since the light previously converted into a long wavelength component such as yellow or orange by the phosphor X1103 is not absorbed by the phosphor Y1104 having a shorter absorption wavelength, there is no problem of secondary absorption and the light guide 1101 is incident. Therefore, even with the configuration of FIG. 11, it is possible to realize bright white illumination in which the blue component is reduced and the long wavelength component greater than green is increased.
　図１１に示した本発明の発光ダイオードを利用した照明装置の特徴をまとめると、以下のようになる。
　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
　前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を緑色の波長成分に波長変換する蛍光体と前記光源に含まれる青色の波長成分を黄色から赤色に至る波長成分に波長変換する蛍光体との少なくとも二種類から構成された蛍光体群を、前記黄色から赤色に至る波長成分に変換させるものが光源に近くなるように重層して配置したことを特徴とする発光ダイオードを利用した照明装置。 The characteristics of the lighting device using the light emitting diode of the present invention shown in FIG. 11 are summarized as follows.
In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction,
A phosphor that converts the wavelength component of blue contained in the light source into a wavelength component of green on at least one light incident surface of the light guide plate, and a wavelength component that changes the wavelength component of blue contained in the light source from yellow to red Light emission characterized in that a phosphor group composed of at least two kinds of phosphors for wavelength conversion is arranged in an overlapping manner so that the one that converts the wavelength component from yellow to red is close to the light source Lighting device using diodes.
　なお、図９または図１１のように二種類の蛍光体を利用する構成においても、蛍光体Ｘ９０３、蛍光体Ｙ９０４、蛍光体Ｘ１１０３、及び蛍光体Ｙ１１０４は、いずれも、連続した蛍光体群であっても、あるいは、不連続な蛍光体群であっても良いことはいうまでもなく、不連続な蛍光体群とする場合においては、図２から図７に至る本発明の発光ダイオードを利用した照明装置の構成に利用することは当然可能であり、必要に応じて適宜採用される。 In the configuration using two types of phosphors as shown in FIG. 9 or FIG. 11, phosphor X903, phosphor Y904, phosphor X1103, and phosphor Y1104 are all continuous phosphor groups. However, it goes without saying that a discontinuous phosphor group may be used. In the case of a discontinuous phosphor group, the light emitting diode of the present invention from FIG. 2 to FIG. 7 is used. Of course, it can be used for the configuration of the lighting device, and is appropriately adopted as necessary.
　本発明の発光ダイオードを利用した照明装置は、主に屋内照明、画像処理、商品デザイン検討といった用途に利用できる。 The lighting device using the light emitting diode of the present invention can be used mainly for applications such as indoor lighting, image processing, and product design examination.
　１０１　導光板
　１０２　基板
　１０３　発光ダイオード
　１０４　蛍光体
　１０５　反射板
　１０６　拡散板
　１１１　導光板
　１１２　反射板
　１１３　拡散板
　１１４　基板
　１１５　発光ダイオード
　１１６　蛍光体
　２０１　筐体
　２０２　導光ユニット
　２０３　蛍光体スポット群
　２０４　基板
　２０５　発光ダイオード群
　３０１　筐体
　３０２　導光ユニット
　３０３　蛍光体スポット群
　３０４　基板
　３０５　発光ダイオード群
　４０１　筐体
　４０２　拡散板
　４０３　発光ダイオード群
　４０４　導光板
　４０５　蛍光体スポット群
　４０６　反射板
　５０１　導光板
　５０２　反射板
　５０３　拡散板
　５０４　蛍光体スポット群
　５０５　発光ダイオード群
　５０６　基板
　５０７　反射リング
　６０１　拡散板
　６０２　蛍光体スポット群
　６０３　側面発光型発光ダイオード群
　６０４　基板
　７０１　導光板
　７０２　拡散板
　７０３　筐体
　７０４　リブ構造
　７０５　蛍光体
　７０６　発光ダイオード
　７０７　つまみ穴
　７０８　つまみ
　８０１　波長スペクトル
　８０２　波長スペクトル
　９０１　導光板
　９０２　発光ダイオード
　９０３　蛍光体Ｘ
　９０４　蛍光体Ｙ
　１００１　波長スペクトル
　１１０１　導光板
　１１０２　発光ダイオード
　１１０３　蛍光体Ｘ
　１１０４　蛍光体Ｙ DESCRIPTION OF SYMBOLS 101 Light guide plate 102 Substrate 103 Light emitting diode 104 Phosphor 105 Reflector 106 Diffusion plate 111 Light guide plate 112 Reflection plate 113 Diffusion plate 114 Substrate 115 Light emitting diode 116 Phosphor 201 Case 202 Light guide unit 203 Phosphor spot group 204 Substrate 205 Light emission Diode group 301 Housing 302 Light guide unit 303 Phosphor spot group 304 Substrate 305 Light emitting diode group 401 Housing 402 Diffuser plate 403 Light emitting diode group 404 Light guide plate 405 Phosphor spot group 406 Reflector plate 501 Light guide plate 502 Reflector plate 503 Diffuser plate 504 Phosphor spot group 505 Light emitting diode group 506 Substrate 507 Reflection ring 601 Diffuser plate 602 Phosphor spot group 603 Side-emitting light emitting diode group 604 Substrate 701 Light guide plate 702 Expansion Plate 703 housing 704 rib structure 705 phosphor 706 emitting diodes 707 pinch holes 708 pinch 801 wavelength spectrum 802 wavelength spectrum 901 light guide plate 902 emitting diodes 903 phosphor X
904 Phosphor Y
1001 Wavelength spectrum 1101 Light guide plate 1102 Light emitting diode 1103 Phosphor X
1104 Phosphor Y

Claims (6)

  1. 　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
    　前記光源からの光を波長変換する蛍光体群を、前記導光板の少なくとも１つの光入射面に不連続に配置し、前記導光板又は前記発光ダイオード群の少なくとも一方の位置を変更することにより、照明光の波長分布を変更させることを特徴とする発光ダイオードを利用した照明装置。     In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction,
    A phosphor group that converts the wavelength of light from the light source is discontinuously disposed on at least one light incident surface of the light guide plate, and by changing the position of at least one of the light guide plate or the light emitting diode group, An illumination device using a light emitting diode, wherein the wavelength distribution of illumination light is changed.
  2. 　前記導光板の光の入射方向に平行な断面の形状が長方形であり、前記発光ダイオー群を前記蛍光体群に平行に設置し、前記導光板及び前記発光ダイオード群の少なくとも一方がスライドできる構造としたことを特徴とする請求項１に記載の発光ダイオードを利用した照明装置。 The light guide plate has a rectangular cross-sectional shape parallel to the light incident direction, the light emitting diode group is installed in parallel to the phosphor group, and at least one of the light guide plate and the light emitting diode group can slide. The illuminating device using the light emitting diode of Claim 1 characterized by the above-mentioned.
  3. 　前記導光板の光の入射方向に平行な断面の形状が円形であり、前記蛍光体群及び前記発光ダイオード群をそれぞれ導光板と同じ中心を有する円周上に配置し、導光板が当該中心を軸として回転できる構造としたことを特徴とする請求項１に記載の発光ダイオードを利用した照明装置。 The shape of the cross section parallel to the light incident direction of the light guide plate is circular, and the phosphor group and the light emitting diode group are arranged on a circumference having the same center as the light guide plate, and the light guide plate has the center. The illumination device using a light emitting diode according to claim 1, wherein the illumination device is configured to be rotatable as a shaft.
  4. 　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
    　前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を他の波長成分に波長変換する蛍光体群を配置したことを特徴とする発光ダイオードを利用した照明装置。     In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction,
    An illumination device using a light emitting diode, wherein a phosphor group that converts a wavelength component of blue contained in the light source into another wavelength component is disposed on at least one light incident surface of the light guide plate.
  5. 　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
    　前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を緑色の波長成分に波長変換する蛍光体と前記光源に含まれる青色の波長成分を黄色から赤色に至る波長成分の波長変換する蛍光体との少なくとも二種類から構成された蛍光体群を、種類の異なる蛍光体が互いに重ならないように配置したことを特徴とする発光ダイオードを利用した照明装置。     In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction,
    A phosphor that converts the wavelength component of blue contained in the light source into a wavelength component of green on at least one light incident surface of the light guide plate, and a wavelength component that changes the wavelength component of blue contained in the light source from yellow to red An illuminating device using a light emitting diode, wherein a phosphor group composed of at least two types of phosphors for wavelength conversion is arranged so that different types of phosphors do not overlap each other.
  6. 　発光ダイオード群からなる光源からの光を導光板の側方から入射させ、該入射方向と直行する面から照明光を放出する照明装置において、
    　前記導光板の少なくとも１つの光入射面に、前記光源に含まれる青色の波長成分を緑色の波長成分に波長変換する蛍光体と前記光源に含まれる青色の波長成分を黄色から赤色に至る波長成分に波長変換する蛍光体との少なくとも二種類から構成された蛍光体群を、前記黄色から赤色に至る波長成分に変換させるものが光源に近くなるように重層して配置したことを特徴とする発光ダイオードを利用した照明装置。     In an illuminating device that makes light from a light source composed of light emitting diodes incident from the side of the light guide plate and emits illumination light from a surface perpendicular to the incident direction,
    A phosphor that converts the wavelength component of blue contained in the light source into a wavelength component of green on at least one light incident surface of the light guide plate, and a wavelength component that changes the wavelength component of blue contained in the light source from yellow to red Light emission characterized in that a phosphor group composed of at least two kinds of phosphors for wavelength conversion is arranged in an overlapping manner so that the one that converts the wavelength component from yellow to red is close to the light source Lighting device using diodes.
PCT/JP2015/072309 2014-08-06 2015-08-06 Lighting device using light-emitting diode WO2016021675A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017104281U1 (en) * 2017-07-19 2018-10-25 Zumtobel Lighting Gmbh lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7373357B2 (en) * 2019-10-29 2023-11-02 シーシーエス株式会社 Inspection system and inspection lighting device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007149500A (en) * 2005-11-28 2007-06-14 Sony Corp Light source device, display device and method of manufacturing light source device
JP2008010556A (en) * 2006-06-28 2008-01-17 Stanley Electric Co Ltd Led light source device and led backlight using the same
JP2012169120A (en) * 2011-02-14 2012-09-06 Minebea Co Ltd Planar lighting device
JP2012199227A (en) * 2011-03-21 2012-10-18 Zhongshan Weiqiang Technology Co Ltd Led light guide plate lighting fixture module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007149500A (en) * 2005-11-28 2007-06-14 Sony Corp Light source device, display device and method of manufacturing light source device
JP2008010556A (en) * 2006-06-28 2008-01-17 Stanley Electric Co Ltd Led light source device and led backlight using the same
JP2012169120A (en) * 2011-02-14 2012-09-06 Minebea Co Ltd Planar lighting device
JP2012199227A (en) * 2011-03-21 2012-10-18 Zhongshan Weiqiang Technology Co Ltd Led light guide plate lighting fixture module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017104281U1 (en) * 2017-07-19 2018-10-25 Zumtobel Lighting Gmbh lamp

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