JP2007066659A - Illumination unit and lighting system - Google Patents

Illumination unit and lighting system Download PDF

Info

Publication number
JP2007066659A
JP2007066659A JP2005249986A JP2005249986A JP2007066659A JP 2007066659 A JP2007066659 A JP 2007066659A JP 2005249986 A JP2005249986 A JP 2005249986A JP 2005249986 A JP2005249986 A JP 2005249986A JP 2007066659 A JP2007066659 A JP 2007066659A
Authority
JP
Japan
Prior art keywords
light
light emitting
reflecting
emitting diode
emitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2005249986A
Other languages
Japanese (ja)
Other versions
JP3787147B1 (en
Inventor
Toshio Hiratsuka
利男 平塚
Original Assignee
Mirai:Kk
株式会社未来
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mirai:Kk, 株式会社未来 filed Critical Mirai:Kk
Priority to JP2005249986A priority Critical patent/JP3787147B1/en
Priority claimed from PCT/JP2005/016848 external-priority patent/WO2006059422A1/en
Application granted granted Critical
Publication of JP3787147B1 publication Critical patent/JP3787147B1/en
Publication of JP2007066659A publication Critical patent/JP2007066659A/en
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00Lighting devices or systems using a string or strip of light sources
    • F21S4/20Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an illumination unit and a lighting system in which light of an LED is condensed at a high efficiency and in which there is no occurrence of color unevenness or a shadow in an irradiation region even in the case of illuminating in proximity. <P>SOLUTION: This is the illumination unit 100 with a light-emitting diode 17 by a multi-color mixing method as a light source, provided with a light-emitting part 21 in which a plurality of the light emitting diodes 17 are arranged and installed at a base, with a first reflecting part 25 that is installed at a light-emitting side of the light emitting part 21 respectively corresponding to a plurality of the light-emitting diodes 17, and that is composed of a parabolic face 25a wherein the light-emitting face of the light-emitting diodes 17 becomes a focal point, and with a second reflecting part 27 that is arranged on the further light-emitting side of the first reflecting part 25 in a pair in parallel with alignment direction of the light-emitting diodes 17 by pinching the light emitting-diodes 17, and that has a planar reflecting face 27a to reflect the light from the light-emitting diodes 17 toward the light-emitting side. At least either reflecting face of the first reflecting part 25 and the second reflecting part 27 is formed in a satin-finished state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an illumination unit using an LED as a light source and an illumination device including the illumination unit.

  As a conventional lighting fixture, various types of illumination light sources such as fluorescent lamps, incandescent bulbs, spotlights, etc. are used, but the illumination light contains ultraviolet components that induce deterioration of the irradiated object, Due to the heat generated by the illumination light source, there were many restrictions on its installation. Recently, LED light sources with low heat generation and low power consumption have attracted attention, and since white LEDs with high brightness have been provided, those using LED light sources for general lighting fixtures are increasing. . An example of this type of lighting device is disclosed in Patent Document 1, for example.

  However, the irradiation light distribution of the direct light obtained from the LED becomes broad as the irradiation distance becomes long even if the directivity is high, and the irradiation region becomes too wide and the illuminance becomes insufficient. FIG. 15A shows the illuminance distribution on the surface separated by a predetermined distance when the LED 81 is made to emit light alone without providing a reflector. As shown in the figure, when the LED 81 is caused to emit light alone on a surface separated by a predetermined distance, a broad light amount distribution is obtained with low illuminance. For this reason, many configurations have been proposed in which a reflector is provided on the LED light source, but all reflectors simply return light directed to the side or rear of the LED light source to the front, and are not necessarily highly condensing. In addition, the irradiation light distribution was broad, and it was supposed to illuminate unnecessary areas. Under such circumstances, it is generally performed to use a high-intensity light source to obtain necessary and sufficient illuminance, and to cut the unnecessary light with a light shielding material such as a louver to limit the irradiation area. .

  However, since the high-intensity light source has high power consumption and a large size, there are many restrictions on the installation of the lighting device and the application range is limited. Furthermore, light shielding materials such as louvers cause a decrease in light utilization efficiency, and many problems remain.

  In general, as a light source for illumination, a light source capable of obtaining an illumination region having a high illuminance and a flat illuminance distribution is required. Therefore, as shown in FIG. 15B, by providing a reflector 83 having a concave paraboloid on the side (or the back side, etc.) of the LED 81, the light from the LED 81 is transmitted by the reflector 83. The light beam density can be increased by parallel light. In addition, the reflection plate 83 can extend the reach of light to some extent. However, although the light component 85 emitted to the side of the LED 81 is deflected by the reflecting plate 83, the light component 86 not irradiated on the reflecting plate 83 travels forward in the optical path while diffusing. For this reason, the illuminance distribution of the light source as a whole can be increased by the reflector 83, but it still exhibits a broad distribution, and a high illuminance and a flat illuminance distribution illumination area necessary for illumination cannot be obtained sufficiently. . Of course, when the LED 81 has a small illuminance angle of about 10 °, the reflection plate 83 is not irradiated with the light emitted from the LED 81, and there are many components that do not substantially contribute to the deflection. I can't hope.

  Accordingly, the inventors of the present application have developed a lighting device including a novel reflector that can collect light from an LED with high efficiency without increasing the output of the LED and obtain high illuminance (Japanese Patent Application No. 2004-2004). 346543). According to the reflecting plate of this illuminating device, it is possible to irradiate light from the LED in a specific range, and it is possible to illuminate with high illuminance within the irradiation range. In addition, the boundary between the irradiated region and the non-irradiated region is clearly separated, and it is possible to selectively remove the region that is not desired to be irradiated.

JP 2000-021209 A

By the way, in the illuminating device provided with the above-mentioned novel reflecting plate, a white LED of a type in which a part of blue light emitted from the blue LED is converted into yellow light by a phosphor to produce pseudo white light is used. That is, in this white LED, when blue light is absorbed by the phosphor, the phosphor emits yellow light, and the yellow light and the blue light that has not been absorbed are mixed into white light.
However, as shown in FIG. 16, particularly when the proximity position is illuminated by the illumination device 87 including the white LED 81, the blue light of the white LED 81 and the phosphor excitation light (yellow light) are color-separated and specified. In the irradiation regions S1, S2, etc., the blue region and the yellow region appear uneven, or a shadow appears. Therefore, when the illuminating device 87 is used as, for example, illumination light on a desk, the quality of the illumination light is significantly lowered.
The present invention provides an illumination unit and illumination that can collect LED light with high efficiency and can obtain uniform illumination light without causing color unevenness and shadow even in the case of illumination in close proximity. The object is to provide a device.

The above object of the present invention is achieved by the following configuration.
(1) An illumination unit using a light emitting diode of a multi-color mixing system as a light source, and a light emitting unit having a plurality of light emitting diodes arranged on a base, and each of the plurality of light emitting diodes on a light emitting side of the light emitting unit The light emitting diode is provided correspondingly, and the light emitting diode is sandwiched between the first reflecting portion having a parabolic surface where the light emitting surface of the light emitting diode is a focal position, and further on the light emitting side of the first reflecting portion. And a second reflecting portion having a flat reflecting surface that reflects the light from the light emitting diode toward the light emitting side, and the first reflecting portion and the first reflecting portion. 2. A lighting unit, wherein at least one of the reflecting surfaces of the reflecting portion is formed in a plain shape.

  In this lighting unit, the light reflected by the plain light reflecting surface is specularly reflected when viewed macroscopically, but is diffusely reflected when viewed microscopically, resulting in dispersion and color separation. The light having different frequency (wavelength) components is mixed.

(2) The multi-color mixed light emitting diode is a white light emitting diode having a blue light emitting diode and a phosphor that converts blue light from the blue light emitting diode into yellow light (1) ) Illumination unit described.

  In this lighting unit, when the blue light emitted from the blue light emitting diode is absorbed by the phosphor, the phosphor emits yellow light, and the yellow light and the blue light that has not been absorbed are mixed together to emit from the light emitting diode. The incident light becomes white light.

(3) The lighting unit according to (1) or (2), wherein the reflecting surfaces of the first reflecting portion and the second reflecting portion are coating processed surfaces by vapor deposition.

  In this lighting unit, the reflecting surface is finished by coating processing by vapor deposition, for example, sputtering plating. The sputtering plating process consists of applying a base coat with a dedicated primer, vapor-depositing aluminum in a vacuum, and urethane clear coating on the aluminum vapor-deposited surface. Therefore, for example, by making the surface to be coated a rough so-called textured finish, the light emitting surface after the sputtering plating can be formed in a solid shape.

(4) An illumination device comprising: the illumination unit according to any one of (1) to (3); and a drive unit that supplies electric power for driving the light emitting diode to emit light.

  In this lighting device, when the commercial power is supplied to the drive unit, the drive unit supplies the drive power necessary for light emission drive to the white light-emitting diode, and the white light-emitting diode is power-saving and has high illuminance and uniformity. Light is emitted with a good illumination distribution.

  According to the illumination unit of the present invention, the illumination unit uses a light emitting diode of a multi-color mixing system as a light source, and includes a first reflecting portion including a parabolic surface in which the light emitting surface of the light emitting diode is a focal position, And a second reflecting part having a pair of parallel reflecting surfaces arranged in parallel with a light emitting diode in between on the light emitting side of the reflecting part, and at least one of the first reflecting part and the second reflecting part Since the reflecting surface is formed in a ground shape, the light reflected by the light reflecting surface in the ground shape is specularly reflected when viewed macroscopically, but is diffused and reflected when viewed microscopically. As a result, light of different frequency (wavelength) components that are dispersed and color-separated are mixed. That is, for example, separated blue light and yellow light are mixed with white light. As a result, the LED light can be condensed with high efficiency, and even when illuminating close, uniform illumination light can be obtained without causing color unevenness and shadows in the irradiation area. Can improve the quality.

  The lighting device according to the present invention includes the above-described lighting unit and a drive unit that supplies power for driving light emission of the light-emitting diode, so that power can be saved by supplying commercial power to the drive unit. Nevertheless, a uniform illuminance distribution can be obtained with high illuminance, and illumination light free from color unevenness and shadow can be irradiated by the independent unit.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a lighting unit and a lighting device according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall configuration diagram showing a first embodiment of a lighting device according to the present invention.
The illuminating device 200 of 1st Embodiment which concerns on this invention has the illumination unit 100 and the drive part 11, and is comprised.
The drive unit 11 supplies light emission drive power to the illumination unit 100, and for example, a full range transformer or the like can be used. The drive unit 11 is connected to a commercial power source, and power from the commercial power source, for example, AC 110 V to 220 V, 50 Hz to 60 Hz, or the like is converted to a drive voltage of DC 12 V (any voltage such as DC 6 V or DC 24 V, or alternating current). The light is converted and supplied to the lighting unit 100.

  The illumination unit 100 includes a rear plate 15, a light emitting unit 21 in which a large number of light emitting diodes (LEDs) 17 are linearly disposed on a wiring board 19 as a base, and a reflecting mirror member 23. Has been. The rear plate 15 is detachably assembled to the reflecting mirror member 23 with the wiring board 19 interposed therebetween.

  The LED 17 includes a blue light emitting diode and a phosphor that converts blue light from the blue light emitting diode into yellow light. Thereby, in the LED 17, when the blue light emitted from the blue light-emitting diode is absorbed by the phosphor, the phosphor emits yellow light, and the yellow light and the blue light that has not been absorbed are mixed, and the emitted light Becomes white light.

FIG. 2 is a side view of the lighting unit (a), a bottom view (b), and FIG. 3 is an exploded perspective view of the lighting unit.
The illumination unit 100 has a height H in a state in which the rear plate 15 is assembled to the reflecting mirror member 23 as shown in FIG. The height H is about 20 mm in the present embodiment, and is significantly thinner than when a heat-generating bulb or a fluorescent lamp is used as the light source. If the height H is too small, the deflection characteristics of the reflecting mirror member 23 are impaired. If the height H is too large, an installation space is required and the degree of freedom in arrangement of the illumination unit 100 cannot be increased. Therefore, the height H is desirably about 15 to 30 mm, particularly about 20 to 23 mm.

  As shown in FIG. 2B, the reflecting mirror member 23 is connected to the mounting base 24 as shown in FIG. 2B, and has an opening at the center position. A first reflecting portion 25 having a plurality of reflecting surfaces (parabolic mirrors) 25a (16 in total in the present embodiment) formed on the light emitting side of the first reflecting portion 25. And a second reflecting portion 27 having a flat reflecting surface (flat plate mirror) 27a parallel to the direction in which the parabolic mirrors 25a are arranged. The second reflecting portion 27 is formed by a pair of plane plate mirrors 27a formed in a direction orthogonal to the direction in which the parabolic mirrors 25a are arranged, and both sides of the arranging direction are the parabolic mirrors of the first reflecting portion 25. They are connected by an extended parabolic wall 27b. The reflecting mirror member 23 is a resin molded product integrally formed by injection molding, and at least the light reflecting surfaces of the first reflecting portion 25 and the second reflecting portion 27 are coated with a mirror surface by plating or aluminum vapor deposition. Is given. Further, the light reflecting surface is not limited to this, and other conventional means can be used.

  At least one of the reflecting surfaces of the first reflecting portion 25 and the second reflecting portion 27 is formed in a ground shape. In the present embodiment, the paraboloidal mirror 25a and the flat plate mirror 27a of both the first reflecting portion 25 and the second reflecting portion 27 are formed in a ground shape. The light reflected by such a plain-shaped light reflecting surface is specularly reflected when viewed macroscopically, but diffused and reflected when viewed microscopically, and as a result, dispersed and color separated. Light of frequency (wavelength) component is mixed.

  Examples of the coating surface to be applied to the reflection surfaces of the first reflection portion 25 and the second reflection portion 27 described above include finishing by sputtering plating. The sputtering plating process consists of applying a base coat with a dedicated primer, vapor-depositing aluminum in a vacuum, and urethane clear coating on the aluminum vapor-deposited surface. Therefore, for example, by finishing the surface to be coated in a rough state, the light emitting surface after sputtering plating can be formed in a solid shape.

  Further, the non-reflective reflecting surface can be matte or glossy. This matte or glossy can be changed by preparing an undercoat solution for plating.

  As shown in FIG. 3, the rear plate 15 includes an umbrella portion 29 having a “<” shape in the longitudinal section, a rib 30 that supports the back side of the wiring board 19 on the inner side surface of the umbrella portion 29, and the umbrella portion 29. The lock claws 31 that engage with the reflecting mirror member 23 are arranged at a plurality of locations in the longitudinal direction (5 locations in the present embodiment). The lock claw 31 is formed in a hook shape in which a pair of upper and lower vertical sections in the figure has a “U” shape.

  The wiring board 19 is, for example, a printed board, and a plurality (16 in this case) of LEDs 17 are linearly mounted on the reflecting mirror member 23 side along the longitudinal direction so as to correspond to the individual parabolic mirrors 25a. Yes. And the lead wire 33 is pulled out from the one end side of the wiring board 19, and is connected to the drive part 11 (refer FIG. 1). Since the wiring board 19 is a single-sided mounting module, it is a safe module that is easy to find a problem when a failure occurs and has excellent maintainability.

  In the reflecting mirror member 23, brackets 37 for fixing the illumination unit 100 are formed at both ends of a mounting base 24 formed in a long flat plate shape, and the rear plate 15 is arranged in the vertical direction of the mounting base 24 in FIG. An engaging portion 39 with which the lock claw 31 is engaged is provided. The engaging portion 39 is detachably combined by sandwiching the wiring board 19 with the rear plate 15 and snapping with the lock claw 31 of the rear plate 15.

  When the reflecting mirror member 23, the wiring board 19, and the rear plate 15 are combined, the light emitting surface of the LED 17 is positioned at the focal position of the parabolic mirror of the first reflecting portion 25. In other words, the reflecting mirror member 23 has discretely arranged surfaces that contact the surface of the wiring board 19, and this contacting surface is a height at which the light emitting surface of the LED 17 becomes the focal position of the parabolic mirror. Is formed. Further, when the wiring board 19 is housed in the board accommodation position formed on the reflecting mirror member 23, the height of the rib 30 of the rear plate 15 is set so as to press the wiring board 19 against the contact surface. .

  Therefore, by simply combining the reflector member 23, the wiring board 19, and the rear plate 15, the focal position of the parabolic mirror and the position of the light emitting surface of the LED 17 can be easily matched with high accuracy. With this configuration, for example, it is possible to easily assemble without using fastening means such as screws, reduce the number of parts, reduce the steps for assembly and adjustment, and improve productivity.

Next, optical characteristics for the illumination unit 100 having the above-described configuration will be described.
4 is a cross-sectional view of the illumination unit shown in FIG.
The reflecting mirror member 23 of the illumination unit 100 includes a first reflecting portion 25 and a second reflecting portion 27 that are continuously formed. A light emitting surface of the LED 17 is parabolically arranged at the base end portion of the first reflecting portion 25. An opening 41 is provided for placement at the focal position of the surface mirror 25a. The parabolic mirror 25a of the first reflecting unit 25 has a reflecting surface made of a parabolic surface with the light emitting surface of the LED 17 as a focal position, and macroscopically directs the light from the LED 17 toward the light emitting side. Reflects in parallel.

  The second reflecting portion 27 is further provided on the light emitting side of the first reflecting portion 25, and is a flat plate-like flat plate arranged in parallel to the arrangement direction of the parabolic mirrors 25a, that is, the arrangement direction of the LEDs 17. A face plate mirror 27a is provided. And the light from LED17 which was not irradiated to the 1st reflection part 25 is received, and it parallelizes and reflects toward the light-projection side. Since the first reflection unit 25 has a predetermined reflection surface region M1 and the second reflection unit 27 has a predetermined reflection surface region M2 continuous to the reflection surface region M1, macroscopically. In other words, the light reflected by the first and second reflecting portions 25 and 27 is irradiated onto the object to be illuminated as a large amount of parallel light.

  The inclination angle of the flat plate mirror 27a with respect to the optical axis of the LED 17 is set to an angle at which the luminous flux from the LED 17 that has not been irradiated onto the first reflecting portion 25 is collimated. In the present embodiment, the inclination angle is set in the range of 20 ° to 27 ° with respect to the optical axis of the LED 17.

  Here, the LED 17 has a wide illuminance angle of, for example, 120 °, and even if the light component emitted toward the side out of the emitted light increases, the first reflection unit 25 and the second reflection. The ratio which is caught by the part 27 and contributes to parallel light conversion becomes high. Thereby, the effect of uniforming the illuminance distribution is further enhanced.

Next, the illuminance distribution by the illumination unit 100 will be described.
FIG. 5 shows an explanatory diagram showing an illuminance distribution by an illumination unit having a reflection surface and a ground shape.
According to this configuration, the amount of light in the range W composed of the light component directly irradiated from the LED 17 and the light component reached with the reflection by the first reflection unit 25 and the second reflection unit 27 is different from that of other regions. In comparison, the boundary appears clearly. This is because the light is condensed in the range W and the light flux is made substantially parallel light, and the irradiance is high. In addition, the maximum illuminance is slightly reduced compared to the case where the light emitting surface is formed as a mirror surface, but the range W where the illuminance is uniform becomes wider, and a single illumination unit 100 can perform illumination over a wider range. It becomes. Furthermore, the deflection state of the light can be adjusted by changing the opening angle θ of the flat plate mirror 27a with respect to the optical axis of the LED 17. In other words, it is possible to increase the opening angle θ to widen the illumination range, or to reduce the opening angle θ and collect light at a specific position. In that case, it is preferable that the first reflection part and the second reflection part are provided separately without being integrated, and the opening angle θ of the flat plate mirror is adjustable.

FIG. 6 is a graph showing the correlation between the relative intensity of the relative spectral distribution and the wavelength.
The relative spectral distribution is such that light in the wavelength region of 450 to 480 nm is obtained with high intensity, and light in the wavelength region near 560 nm is obtained. Here, a sharp emission peak near 440 nm is emitted light from the blue light-emitting diode, and a broad peak near 560 nm is emission from the phosphor. In addition, since this spectral distribution does not include light in the wavelength range of 365 nm to 410 nm that is preferred by insects, it is possible to realize the lighting device 200 that is less susceptible to insects such as moths and mosquitoes.

  Therefore, according to the illumination unit described above, the illumination unit 100 uses the LED 17 of the multi-color mixing method as a light source, and the first reflection unit 25 having a parabolic surface in which the light emitting surface of the LED 17 is a focal position, and the first On the light emitting side of the reflecting portion 25, a second reflecting portion 27 having a pair of parallel reflecting surfaces (planar plate mirrors) 27a arranged in parallel with the LED 17 interposed therebetween is provided. Since the reflecting surface of the two reflecting portions 27 is formed in a ground shape, the light reflected by the ground-like reflecting surface is specularly reflected when viewed macroscopically, but when viewed microscopically, it is shown in FIG. As shown by the arrow 43, the light having a different frequency (wavelength) component that is diffused and reflected and dispersed and color-separated is mixed. That is, for example, separated blue light and yellow light are mixed with white light. As a result, the LED light can be condensed with high efficiency, and even when illuminating close, uniform illumination light can be obtained without causing color unevenness and shadows in the irradiation area. Can improve the quality.

  Moreover, according to the illuminating device 200 provided with the illumination unit 100, since the drive unit 11 that supplies power for driving the LEDs 17 to emit light is provided, power is saved by supplying commercial power to the drive unit 11. However, a uniform illuminance distribution can be obtained at a high illuminance, and illumination light without color unevenness and shadow can be irradiated by the independent single device.

In order to confirm the effect of the illumination unit 100 having the above configuration, the illuminance characteristics and the light distribution characteristics were tested under the following conditions.
An illumination unit formed with a reflective surface and no ground luster in the configuration of the above embodiment is referred to as Example 1, and an illumination unit formed with a reflective surface and ground luster is defined as Example 2. In addition, an illumination unit in which the reflection surface is formed as a mirror surface in the configuration of the above embodiment is referred to as Comparative Example 1, and an illumination unit including only the LED 17 that does not include the first reflection unit 25 and the second reflection unit 27 is referred to as Comparative Example 2.

Moreover, the property of the illumination unit used for the Example and the comparative example is shown below.
-Number of LEDs 16-External dimensions of reflector member 23 23.8 mm long, 264 mm wide, height (H) 16.25 mm

  Further, the matte reflection surface of Example 1 and Example 2 was formed by using different plating undercoat liquids. That is, the plating undercoat liquid of Example 1 used 500 made by Tosho Co., Ltd. No gloss 28, and the plating undercoat liquid of Example 2 used K173NP under manufactured by Toyo Kogyo Co., Ltd.

The surface texture of the reflective surface with matte or glossy can be identified with a corresponding roughness using, for example, a sandpaper number. That is, sandpaper equivalent number N 1 of surface properties of Example 1 is a # 60 ≦ N 1 ≦ # 100 , preferably # 75 ≦ N 1 ≦ # 85 . In addition, the sandpaper equivalent number N 2 in Example 2 is # 70 ≦ N 2 ≦ # 100, preferably # 80 ≦ N 2 ≦ # 90.

  7 is a graph showing the illuminance characteristics of Example 1, FIG. 8 is a graph showing the light distribution characteristics of Example 1, FIG. 9 is a graph showing the illuminance characteristics of Example 2, and FIG. 11 is a graph showing the light distribution characteristic, FIG. 11 is a graph showing the illuminance characteristic of Comparative Example 1, FIG. 12 is a graph showing the light distribution characteristic of Comparative Example 1, and FIG. 13 is a graph showing the illuminance characteristic of Comparative Example 2. FIG. 14 is a graph showing the light distribution characteristics of Comparative Example 2. 8, 10, 12, and 14, the angle of the horizontal axis represents the result of rotating 90 degrees symmetrically about the central axis of the light emitting surface of the illumination unit 100 with respect to the measuring instrument as the rotation axis. The solid line represents the result of measurement with the axis parallel to the longitudinal direction of the illumination unit 100 as the rotation axis, and the wavy line represents the measurement result with the axis in the direction orthogonal to the rotation axis as the rotation axis.

Table 1 shows the surface properties, power supply, total luminous flux, efficiency, maximum luminous intensity, 1/2 beam angle, and evaluation of Example 1, Example 2, Comparative Example 1, and Comparative Example 2.

  In Example 1, as shown in FIG. 7, an irradiation area with an illuminance of 10 lx was formed with a horizontal distance of about 0.8 m at an irradiation distance of 2 m. Further, as shown in FIG. 8, a uniform luminous intensity of 20 to about 50 cd was obtained at a light distribution angle of −30 to 30 °, and color separation between blue light and yellow light was not recognized.

  As shown in FIG. 9, in Example 2, an irradiation area with an illuminance of 10 lx is formed with a horizontal distance of about 0.8 m at an irradiation distance of 2 m, and an irradiation area with an illuminance of 20 lx is formed on the inner side thereof with a horizontal distance of 0.4 m. Formed with. Further, as shown in FIG. 10, a light intensity of 20 to about 100 cd was obtained at a light distribution angle of −30 to 30 °, and color separation between blue light and yellow light was not recognized.

  In Comparative Example 1, as shown in FIG. 11, an irradiation region with an illuminance of 50 lx was formed with a horizontal distance of about 0.4 m at an irradiation distance of 2 m. In addition, as shown in FIG. 12, a light intensity of 50 to about 400 cd was obtained at a light distribution angle of −10 to 10 °, but color separation between blue light and yellow light was observed.

  In Comparative Example 2, as shown in FIG. 14, an irradiation region in which the light intensity of 0 to about 15 cd changes gently at an orientation angle of −90 ° to 90 ° is formed, and the color separation between blue light and yellow light is I was not able to admit. However, as shown in FIG. 13, at an irradiation distance of 1.6 m, an irradiation region with an illuminance of 5 lx was only formed at a horizontal distance of about 0.8 m, and sufficient illuminance could not be secured.

  Therefore, in Example 1 in which the reflecting surface is formed without a ground luster and in Example 2 in which the reflecting surface is formed with a ground luster, the light of the LED is condensed with high efficiency and within the irradiation region. It was found that color unevenness and shadows were not generated.

It is a whole block diagram which shows 1st Embodiment of the illuminating device which concerns on this invention. It is the side view (a) and bottom view (b) of an illumination unit. It is a disassembled perspective view of an illumination unit. It is AA sectional drawing of the illumination unit shown in FIG. It is a graph which shows the illumination intensity distribution by an illumination unit. It is a graph showing the correlation between the relative intensity of the relative spectral distribution and the wavelength. 3 is a graph showing the illuminance characteristics of Example 1. FIG. 3 is a graph showing light distribution characteristics of Example 1. 6 is a graph showing the illuminance characteristics of Example 2. 6 is a graph showing light distribution characteristics of Example 2. 6 is a graph showing the illuminance characteristics of Comparative Example 1. 5 is a graph showing light distribution characteristics of Comparative Example 1. 10 is a graph showing the illuminance characteristics of Comparative Example 2. 10 is a graph showing light distribution characteristics of Comparative Example 2. (A), (b) is a schematic diagram of the conventional illuminating device. It is explanatory drawing showing the condition of the color separation in the conventional illuminating device.

Explanation of symbols

11 Drive unit 17 LED (light emitting diode)
21 Light-emitting part 25 1st reflection part 25a Parabolic mirror (parabolic surface)
27 Second reflector 100 Illumination unit 200 Illumination device

Claims (4)

  1. A lighting unit using a light emitting diode as a light source by a multi-color mixing method,
    A light emitting unit having a plurality of light emitting diodes arranged on a base;
    A first reflecting portion provided on the light emitting side of the light emitting portion corresponding to each of the plurality of light emitting diodes, and having a parabolic surface in which the light emitting surface of the light emitting diode is a focal position;
    A pair of plates arranged parallel to the arrangement direction of the light emitting diodes with the light emitting diodes sandwiched further on the light emitting side of the first reflecting portion, and reflecting light from the light emitting diodes toward the light emitting side A second reflecting portion having a reflecting surface having a shape,
    An illumination unit, wherein a reflection surface of at least one of the first reflection part and the second reflection part is formed in a plain shape.
  2.   2. The white light emitting diode according to claim 1, wherein the multi-color mixed light emitting diode is a white light emitting diode having a blue light emitting diode and a phosphor that converts blue light from the blue light emitting diode into yellow light. Lighting unit.
  3.   The illumination unit according to claim 1, wherein the reflection surfaces of the first reflection part and the second reflection part are coating processed surfaces by vapor deposition.
  4. The lighting unit according to any one of claims 1 to 3,
    A drive unit for supplying power for driving the light emitting diode to emit light;
    An illumination device comprising:
JP2005249986A 2005-08-30 2005-08-30 Lighting unit and lighting device Expired - Fee Related JP3787147B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005249986A JP3787147B1 (en) 2005-08-30 2005-08-30 Lighting unit and lighting device

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2005249986A JP3787147B1 (en) 2005-08-30 2005-08-30 Lighting unit and lighting device
PCT/JP2005/016848 WO2006059422A1 (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
US11/596,814 US20070230171A1 (en) 2004-11-30 2005-09-13 Illumination Unit and Illumination Apparatus
EP05783190A EP1818607A4 (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
TW094131419A TWI303701B (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
EP09150191A EP2039991A3 (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
KR1020067024265A KR100784596B1 (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
MYPI20055596A MY138360A (en) 2004-11-30 2005-11-30 Illumination unit and illumination apparatus

Publications (2)

Publication Number Publication Date
JP3787147B1 JP3787147B1 (en) 2006-06-21
JP2007066659A true JP2007066659A (en) 2007-03-15

Family

ID=36674824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005249986A Expired - Fee Related JP3787147B1 (en) 2005-08-30 2005-08-30 Lighting unit and lighting device

Country Status (1)

Country Link
JP (1) JP3787147B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009224148A (en) * 2008-03-14 2009-10-01 Institute Of National Colleges Of Technology Japan Lighting device
JP2010189836A (en) * 2009-02-13 2010-09-02 Okamura Corp Partition
JP2011142019A (en) * 2010-01-07 2011-07-21 Panasonic Electric Works Co Ltd Luminaire
WO2012115410A2 (en) * 2011-02-25 2012-08-30 주식회사 필룩스 Lighting device
JP2013196847A (en) * 2012-03-16 2013-09-30 Mitsubishi Electric Lighting Corp Led lamp
WO2017051637A1 (en) * 2015-09-25 2017-03-30 ウシオ電機株式会社 Light irradiation device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009224148A (en) * 2008-03-14 2009-10-01 Institute Of National Colleges Of Technology Japan Lighting device
JP2010189836A (en) * 2009-02-13 2010-09-02 Okamura Corp Partition
JP2011142019A (en) * 2010-01-07 2011-07-21 Panasonic Electric Works Co Ltd Luminaire
WO2012115410A2 (en) * 2011-02-25 2012-08-30 주식회사 필룩스 Lighting device
WO2012115410A3 (en) * 2011-02-25 2012-11-01 주식회사 필룩스 Lighting device
JP2013196847A (en) * 2012-03-16 2013-09-30 Mitsubishi Electric Lighting Corp Led lamp
WO2017051637A1 (en) * 2015-09-25 2017-03-30 ウシオ電機株式会社 Light irradiation device

Also Published As

Publication number Publication date
JP3787147B1 (en) 2006-06-21

Similar Documents

Publication Publication Date Title
US9803847B2 (en) Mounting arrangement and method for light emitting diodes
US8297797B2 (en) Lighting apparatus
US10215911B2 (en) Lighting assembly
EP2162674B1 (en) Light fixtures and lighting devices
US8556471B2 (en) Lighting module, lamp and lighting method
US9217550B2 (en) Lighting apparatus
US9512977B2 (en) Reduced contrast LED lighting system
KR100731454B1 (en) Light emitting device and illumination instrument using the same
US8287152B2 (en) Lighting apparatus using light emitting diode
US7744256B2 (en) LED array wafer lighting fixture
JP5210342B2 (en) Modular light reflector and assembly for lighting fixtures
US8602602B2 (en) LED downlight with improved light output
TWI568966B (en) Troffer-style fixture
DE60318464T2 (en) Compact light diode retrofit lamp and method for amplifiers
US8905575B2 (en) Troffer-style lighting fixture with specular reflector
US10443797B2 (en) Finite element and multi-distribution LED luminaire
US8602601B2 (en) LED downlight retaining ring
RU2459142C1 (en) Street lamp based on light diodes
US8220970B1 (en) Heat dissipation assembly for an LED downlight
US8262253B2 (en) Lighting method and system
CN100557297C (en) Luminous plaque and luminescent device
KR20130122648A (en) Troffer-style optical assembly
JP5198278B2 (en) Lighting apparatus having LED
US9222645B2 (en) LED lighting assembly and method of lighting for a merchandise display
US7635206B2 (en) Light emitting diode lighting device having a lens connected to a hood

Legal Events

Date Code Title Description
TRDD Decision of grant or rejection written
A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20060309

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060315

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060323

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060721

A072 Dismissal of procedure

Free format text: JAPANESE INTERMEDIATE CODE: A072

Effective date: 20061219

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090331

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100331

Year of fee payment: 4

S202 Request for registration of non-exclusive licence

Free format text: JAPANESE INTERMEDIATE CODE: R315201

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100331

Year of fee payment: 4

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100331

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100331

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110331

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120331

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130331

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130331

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140331

Year of fee payment: 8

LAPS Cancellation because of no payment of annual fees