JP2007234632A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce possibility that reflected light from a reflection face of a reflector becomes weak when LED is turned on while auxiliary light can be irradiated when LED is turned off. <P>SOLUTION: A lighting system is provided with LED1a1, an LED package 1a having a phosphor 1a2 arranged to cover LED1a1, and a reflector 1b having the reflection face 1b1 for reflecting light from LED1a1 and the phosphor 1a2. A part 1b1a where a light accumulation material is arranged, and a part 1b1b where the light accumulation material is not arranged, are disposed on the reflection face 1b1 of the reflector 1b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lighting device including a phosphor arranged to cover an LED, and a reflector having a reflecting surface for reflecting light from the LED and the phosphor, and in particular, an auxiliary device when the LED is turned off. It is related with the illuminating device which can reduce a possibility that the reflected light from a reflective surface may become weak at the time of ON of LED, enabling it to irradiate light.

  Specifically, the present invention relates to an illumination device that can achieve three of energy saving, color reproducibility, and high brightness at the same time.

  Conventionally, an illuminating device (LED device) including a phosphor disposed so as to cover an LED (LED chip) and a reflector (frame body) having a reflection surface for reflecting light from the LED (LED chip) )It has been known. As an example of this type of lighting device (LED device), for example, there is one described in Japanese Patent Application Laid-Open No. 2004-128393.

  In the illuminating device (LED device) described in Japanese Patent Application Laid-Open No. 2004-128393, a phosphor is kneaded with a translucent resin covering the LED (LED chip), and light from the LED (LED chip) is emitted. A phosphor layer is formed on the reflecting surface for reflection.

  Therefore, in the illumination device (LED device) described in Japanese Patent Application Laid-Open No. 2004-128393, light emitted from the LED (LED chip) without reaching the reflecting surface is translucent. Wavelength conversion is performed by the phosphor kneaded in the resin. Of the light emitted from the LED (LED chip), the light reflected and irradiated by the reflecting surface is wavelength-converted by the phosphor layer formed on the reflecting surface.

  By the way, in the illuminating device (LED device) described in Japanese Patent Application Laid-Open No. 2004-128393, the light emitted from the LED (LED chip) is wavelength-converted by the phosphor, thereby achieving color reproducibility and high brightness. Although achieved, the lighting device (LED device) described in Japanese Patent Application Laid-Open No. 2004-128393 does not have a light storage function.

  For this reason, in the illumination device (LED device) described in Japanese Patent Application Laid-Open No. 2004-128393, the LED (LED chip) must be kept on when trying to continue irradiating light. That is, the illumination device (LED device) described in Japanese Patent Application Laid-Open No. 2004-128393 cannot emit auxiliary light when the LED (LED chip) is turned off.

  On the other hand, in the illumination device (light emitting element) described in Japanese Patent Application Laid-Open No. 2003-197979, an LED (LED chip) is covered with a covering material containing a phosphor (fluorescent substance) having a luminous property (long afterglow characteristic). ing.

  Specifically, in the illumination device (light emitting element) described in Japanese Patent Laid-Open No. 2003-197979, a part of light emitted from the LED (LED chip) when the LED (LED chip) is turned on is a phosphor (phosphor substance). ) And when the LED (LED chip) is OFF, the light stored in the phosphor (fluorescent substance) is irradiated.

  That is, according to the illumination device (light emitting element) described in Japanese Patent Application Laid-Open No. 2003-197979, light equivalent to the light emitted when the LED (LED chip) is turned on is emitted when the LED (LED chip) is turned off. Energy saving effect can be achieved.

  Accordingly, in order to provide the lighting device (LED device) described in Japanese Patent Application Laid-Open No. 2004-128393 with a phosphorescent function, instead of the phosphor layer described in Japanese Patent Application Laid-Open No. 2004-128393, Japanese Patent Application Laid-Open No. 2003-197979. It is considered that a covering material containing a phosphor (fluorescent substance) having a phosphorescent property (long afterglow characteristic) described in the Japanese Patent Publication is disposed on a reflection surface for reflecting light from an LED (LED chip). It is done.

  However, the phosphor having the phosphorescent property (long afterglow characteristic) described in Japanese Patent Application Laid-Open No. 2003-197979 is formed on the entire reflection surface of the illumination device (light emitting element) described in Japanese Patent Application Laid-Open No. 2003-197979. If it is covered with a coating material containing a fluorescent substance), auxiliary light can be emitted when the LED (LED chip) is turned off, but reflected light from the reflecting surface when the LED (LED chip) is turned on. May be weakened.

  That is, there is a possibility that the reflectance of the reflecting surface is lowered by the covering material including the phosphor (fluorescent substance) having the luminous property (long afterglow characteristic) disposed on the entire reflecting surface.

JP 2004-128393 A JP 2003-197979 A

  In view of the above-described problems, the present invention provides an illuminating device that can reduce the possibility that reflected light from a reflecting surface becomes weak when an LED is turned on, while allowing auxiliary light to be emitted when the LED is turned off. For the purpose.

  Specifically, an object of the present invention is to provide an illuminating device that can simultaneously achieve three of energy saving, color reproducibility, and high luminance.

  According to invention of Claim 1, it comprises LED, the fluorescent substance arrange | positioned so that the said LED may be covered, and the reflector which has a reflective surface for reflecting the light from said LED and said fluorescent substance. In the illuminating device, there is provided an illuminating device characterized in that a portion where a phosphorescent material is disposed and a portion where a phosphorescent material is not disposed are provided on the reflecting surface.

  According to invention of Claim 2, the phosphorescent material was apply | coated to the said reflective surface in the shape of a mesh or a dot, The illuminating device of Claim 1 characterized by the above-mentioned is provided.

  According to the third aspect of the present invention, there is provided the illuminating device according to the first aspect, wherein a mesh-like sheet including a phosphorescent material is attached to the reflecting surface.

  According to a fourth aspect of the present invention, there is provided the lighting device according to the first aspect, wherein the reflector coated with the phosphorescent material is covered with a sheet having holes.

  According to a fifth aspect of the present invention, there is provided the lighting device according to the first aspect, wherein the reflector is formed of a material to which a phosphorescent material is added.

  According to invention of Claim 6, the heat-transfer member has been arrange | positioned between the said LED and the said fluorescent substance, and the said luminous material, The illumination as described in any one of Claims 1-5 characterized by the above-mentioned. An apparatus is provided.

  According to the seventh aspect of the present invention, there is provided the lighting device according to the sixth aspect, wherein a heat sink is disposed between the LED and the phosphor and the phosphorescent material.

  In the illuminating device of Claims 1-5, the phosphorescent material is arrange | positioned at the reflective surface for reflecting the light from LED and fluorescent substance. Therefore, according to the illuminating device of Claims 1-5, the light stored in the phosphorescent material when LED is ON can be irradiated when LED is OFF. Thereby, auxiliary light can be irradiated when the LED is OFF. In other words, according to the illuminating device of Claims 1-5, the power consumption of LED can be reduced.

  Preferably, in the lighting device according to any one of claims 1 to 5, a phosphor is selected mainly for color reproducibility and high luminance. Therefore, according to the illuminating device of Claims 1-5, three, energy saving, color reproducibility, and high brightness, can be achieved simultaneously.

  Furthermore, in the illuminating device of Claims 1-5, the part by which the luminous material is arrange | positioned, and the part by which the luminous material is not arrange | positioned are provided in the reflective surface.

  Preferably, in the illuminating device according to any one of claims 1 to 5, the phosphorescent material is applied to the reflecting surface in a mesh shape or a dot shape.

  Preferably, in the illuminating device according to any one of claims 1 to 5, a mesh-like sheet including a phosphorescent material is attached to the reflecting surface.

  Alternatively, preferably, in the illumination device according to any one of claims 1 to 5, the reflector to which the phosphorescent material is applied is covered with a sheet having holes.

  Preferably, in the lighting device according to any one of claims 1 to 5, the reflector is formed of a material to which a phosphorescent material is added. More preferably, the reflector is formed of a material to which a phosphorescent material is added.

  In other words, in the illuminating device according to the first to fifth aspects, the phosphorescent material is not disposed on the entire reflecting surface, but a portion where the phosphorescent material is not disposed is left on the reflecting surface.

  Therefore, according to the illuminating device of Claims 1-5, the reflectance of a reflective surface can be made higher than the case where the luminous material is arrange | positioned in the whole surface of a reflective surface. In other words, according to the illuminating device of Claims 1-5, a possibility that the reflected light from a reflective surface may become weak when LED is ON can be reduced.

  That is, according to the lighting device according to any one of claims 1 to 5, it is possible to irradiate auxiliary light when the LED is turned off, and to reduce the possibility that reflected light from the reflecting surface becomes weak when the LED is turned on. it can.

  In the illuminating device of Claim 6 and 7, the heat-transfer member is arrange | positioned between LED and fluorescent substance, and the luminous material. In other words, in the illumination device according to claims 6 and 7, the LED, the phosphor, and the phosphorescent material are thermally connected. Preferably, in the illumination device according to claims 6 and 7, a heat sink is disposed between the LED and the phosphor and the phosphorescent material.

  Therefore, according to the illuminating device of Claims 6 and 7, the temperature of the phosphorescent material can be improved by the heat generated by the LEDs, and thereby the emission intensity of the phosphorescent material can be improved.

  Hereinafter, a first embodiment of the illumination device of the present invention will be described. FIG. 1 is a diagram showing an LED module 1 that constitutes a part of the illumination device according to the first embodiment. Specifically, FIG. 1 (A) is a left side view of the LED module 1 partially shown in cross section, FIG. 1 (B) is a front view of the LED module 1, and FIG. 1 (C) is a front view of the LED module 1. FIG. 1D is a bottom view of the LED module 1 as seen from the left side and the lower side.

  In FIG. 1, 1a has shown the LED package. Reference numeral 1b denotes a reflector having a reflecting surface for reflecting light emitted from the LED package 1a downward (lower side in FIGS. 1A and 1B). Reference numeral 1c denotes a lens attached to the reflector 1b in order to control light distribution of direct light from the LED package 1a and reflected light from the reflecting surface of the reflector 1b.

  In FIG. 1, reference numeral 1d denotes a thermal interface material for supporting the LED package 1a and the reflector 1b and for radiating or conducting heat generated by the LED package 1a. Reference numeral 1e denotes a housing for supporting the thermal interface material 1d. Reference numeral 1e1 denotes a fin constituting a part of the housing 1e. Reference numeral 1f denotes a cover for covering the LED package 1a, the reflector 1b, the lens 1c, and the thermal interface material 1d. Reference numeral 2 denotes an attachment member for attaching the LED module 1.

  In the illumination device of the first embodiment, as shown in FIG. 1, a part of the heat generated by the LED package 1a is dissipated from the thermal interface material 1d. Further, part of the heat generated by the LED package 1a is thermally conducted to the fins 1e1 of the housing 1e through the thermal interface material 1d, and is radiated from the fins 1e1. Further, part of the heat generated by the LED package 1a is thermally conducted to the mounting member 2 through the thermal interface material 1d and the housing 1e, and is radiated from the mounting member 2.

  In the illumination device of the first embodiment, as shown in FIG. 1, three LED packages 1a, a reflector 1b, and a lens 1c are provided in one LED module 1, but the illumination of the second embodiment In the apparatus, it is also possible to provide any number of LED packages 1a, reflectors 1b, and lenses 1c other than three sets in one LED module 1 instead.

  FIG. 2 is an enlarged cross-sectional view of the LED package 1a and the like shown in FIG. In the illuminating device of 1st Embodiment, as shown in FIG. 2, LED package 1a is comprised by LED1a1 and fluorescent substance 1a2 arrange | positioned so that those LED1a1 may be covered. Specifically, a phosphor is selected mainly for color reproducibility and high luminance. More specifically, for example, a phosphor that is excited and emitted by blue light and ultraviolet light is selected.

  FIG. 3 is an enlarged view of the LED package 1a, the reflector 1b, and the thermal interface material 1d shown in FIG. Specifically, FIG. 3A is an enlarged cross-sectional view of the LED package 1a, the reflector 1b, and the thermal interface material 1d as viewed from the front. FIG. 3B is a bottom view thereof, that is, a view of them as seen from the lower side of FIG.

  In the illuminating device of 1st Embodiment, as shown to FIG. 3 (A) and FIG. 3 (B), the part 1b1a by which the luminous material is arrange | positioned, and the luminous material are arrange | positioned at the reflective surface 1b1 of the reflector 1b. A portion 1b1b that is not provided is provided. Specifically, a portion 1b1a where the phosphorescent material is disposed is formed by applying the phosphorescent material in a mesh pattern on the reflecting surface 1b1 of the reflector 1b. Further, a phosphorescent material is applied over the entire lower surface of the reflector 1b (the lower surface in FIG. 3A). As the phosphorescent material, for example, a fluorescent material having long persistence, light luminance, and reliability is used. Specifically, for example, those composed of rare earth activated divalent metal aluminate, those composed of rare earth activated divalent metal boric acid substituted aluminate, Eu activated and rare earth activated coactivated silicic acid A material composed of a salt or a material composed of Eu-activated rare earth oxysulfate is used as a phosphorescent material.

  Furthermore, in the illumination device of the first embodiment, as shown in FIG. 3, a part of the heat generated by the LED package 1a is reflected on the reflective surface 1b1 of the reflector 1b via the thermal interface material 1d and the reflector 1b. Heat conduction is performed to the phosphorescent material and the phosphorescent material on the lower surface of the reflector 1b. Thereby, the temperature of the phosphorescent material is raised, and the emission intensity of the phosphorescent material is increased.

  Moreover, in the illuminating device of 1st Embodiment, as shown in FIGS. 1-3, when LED1a1 is ON, a part of light radiated | emitted from LED1a1 and fluorescent substance 1a2 is light distribution-controlled by the lens 1c, Irradiates the lower side of FIG. Further, when the LED 1a1 is turned on, a part of the light emitted from the LED 1a1 and the phosphor 1a2 is reflected by the portion 1b1b of the reflecting surface 1b1 of the reflector 1b where no phosphorescent material is arranged, and the light distribution control is performed by the lens 1c. And irradiated on the lower side of FIG. Furthermore, when the LED 1a1 is turned on, a part of the light emitted from the LED 1a1 and the phosphor 1a2 and the light that has entered the LED module 1 from the outside of the LED module 1 (for example, sunlight, light from other lighting devices, etc.) Is stored by the phosphorescent material on the reflecting surface 1b1 of the reflector 1b and the phosphorescent material on the lower surface of the reflector 1b.

  Furthermore, in the illuminating device of 1st Embodiment, as shown in FIGS. 1-3, when LED1a1 is OFF, the light which the luminous material on the reflective surface 1b1 of the reflector 1b emitted is radiated | emitted, and light distribution is carried out by the lens 1c. Controlled and irradiated to the lower side of FIG. Further, when the LED 1a1 is OFF, light emitted from the phosphorescent material on the lower surface of the reflector 1b is emitted and irradiated to the lower side of FIG.

  In detail, in the illuminating device of 1st Embodiment, LED1a is pulse-driven in consideration of the afterglow brightness | luminance of a phosphorescent material, and the light emission from a phosphorescent material is used supplementarily when LED1a1 is OFF. Thereby, energy saving is achieved.

  More specifically, in the lighting device according to the first embodiment, the afterglow luminance, the afterglow time, and the time to reach the saturation luminance of the phosphorescent material are considered, and the user of the lighting device feels blinking of the LED 1a1 when the LED 1a1 is turned off. The OFF period of the LED 1a1 is set so that the maximum luminance of the phosphorescent material can be obtained within a range in which no light is felt.

  FIG. 4 is a diagram showing a light distribution pattern of light emitted from the LED module 1 shown in FIG. The left side of FIG. 4 corresponds to the rear side of LED module 1 shown in FIG. 1 (the lower left side of FIG. 1C), and the right side of FIG. 4 shows the front side of LED module 1 shown in FIG. 4 corresponds to the right side (lower right side of FIG. 1C) of the LED module 1 shown in FIG. 1, and the lower side of FIG. 4 corresponds to FIG. This corresponds to the left side of the LED module 1 shown in FIG.

  In the illuminating device of 1st Embodiment, as shown in FIG.1 and FIG.4, the left-right direction of the LED module 1 (front-back side direction of FIG. 1 (A), the left-right direction of FIG. 1 (B), FIG. The degree of light collection in the upper left-lower right direction in (C), the left-right direction in FIG. 1D, and the up-down direction in FIG. 4 is the front-back direction of the LED module 1 (left-right direction in FIG. 1A, FIG. 1). The lens 1c is smaller than the degree of light condensing in the front-back side direction of (B), the upper-right side-lower-left direction of FIG. 1C, the up-down direction of FIG. 1D, and the left-right direction of FIG. Is set.

  In other words, in the illuminating device of 1st Embodiment, as shown in FIG. 4, the light distribution pattern of the light irradiated from LED module 1 is the left-right direction (FIG. 4) rather than the front-back direction (left-right direction of FIG. 4). 4 (vertical direction of 4).

  5 and 6 are views showing a mounting member 2 to which a plurality of LED modules 1 shown in FIG. 1 are attached, and a lamp umbrella 3 for covering the plurality of LED modules 1 and the mounting members 2. Specifically, FIG. 5A is a front view of the mounting member 2 and the lamp umbrella 3, FIG. 5B is a bottom view of the mounting member 2 and the lamp umbrella 3, and FIG. FIG. 6 and FIG. 6B are left side views of the attachment member 2 as seen through a part of the lamp umbrella 3.

  In the illuminating device of 1st Embodiment, as shown to FIG. 5 (A) and FIG.5 (B), the attachment member 2 has 18 divisions 2-1, 2-2, 2-3, 2-4. 2-5, 2-6, 2-7, 2-8, 2-9, 2-10, 2-11, 12-12, 2-13, 2-14, 2-15, 2-16, 2- 17 and 2-18, and the LED module 1 (1-1, 1-2, 1-3, 1-4, 1- 1) shown in FIG. 14, 1-7, 1-8, 1-9, 1-10, 1-12, 1-13, 1-15, 1-16, 1-18) are attached.

  Specifically, as shown in FIGS. 5A and 5B, the section 2-1, the section 2-2, and the section 2-3 of the attachment member 2 are bent in two stages, It is formed in a concave shape (specifically, a concave shape when viewed from below). As a result, the LED module 1-1 attached to the section 2-1, the LED module 1-2 attached to the section 2-2, and the LED module 1-3 attached to the section 2-3 are different. It is oriented in the direction.

  5A and 5B, the section 2-4, the section 2-5, and the section 2-6 of the attachment member 2 are bent in two stages to form a concave shape ( In detail, it is formed in a concave shape when viewed from below. As a result, the LED module 1-4 attached to the section 2-4 and the LED module 1-6 attached to the section 2-6 are oriented in different directions. Furthermore, the angle at which the sections 2-1 and 2-3 are bent with respect to the section 2-2 of the mounting member 2 and the angle at which the sections 2-4 and 2-6 are bent with respect to the section 2-5 of the mounting member 2 And are set to different values. As a result, the LED module 1-4 attached to the section 2-4 and the LED module 1-6 attached to the section 2-6 are different from the LED modules 1-1, 1-2, and 1-3. It is aimed at.

  Further, as shown in FIGS. 5A and 5B, the section 2-7, the section 2-8, and the section 2-9 of the attachment member 2 are bent in two stages to form a concave shape ( In detail, it is formed in a concave shape when viewed from below. As a result, the LED module 1-7 attached to the section 2-7, the LED module 1-8 attached to the section 2-8, and the LED module 1-9 attached to the section 2-9 are mutually connected. It is oriented in different directions. Further, as shown in FIGS. 5B and 6B, the section 2-5 and the section 2-8 of the attachment member 2 are convex (specifically, convex when viewed from below). Is bent. As a result, the LED module 1-7 attached to the section 2-7, the LED module 1-8 attached to the section 2-8, and the LED module 1-9 attached to the section 2-9 are 1-1, 1-2, 1-3, 1-4, and 1-6 are directed in different directions.

  Moreover, as shown to FIG. 5 (A) and FIG. 5 (B), the division 2-10 of the attachment member 2, the division 2-11, and the division 2-12 are bent in two steps, and concave ( In detail, it is formed in a concave shape when viewed from below. As a result, the LED module 1-10 attached to the section 2-10 and the LED module 1-12 attached to the section 2-12 are oriented in different directions. Furthermore, the angle at which the sections 2-7 and 2-9 are bent with respect to the section 2-8 of the mounting member 2, and the angle at which the sections 2-10 and 2-12 are bent with respect to the section 2-11 of the mounting member 2 And are set to different values. As a result, the LED module 1-10 attached to the section 2-10 and the LED module 1-12 attached to the section 2-12 include the LED modules 1-1, 1-2, 1-3, 1- 4, 1-6, 1-7, 1-8, 1-9 are directed in different directions.

  Further, as shown in FIGS. 5A and 5B, the section 2-13, the section 2-14, and the section 2-15 of the attachment member 2 are bent in two stages to form a concave shape ( In detail, it is formed in a concave shape when viewed from below. As a result, the LED module 1-13 attached to the section 2-13 and the LED module 1-15 attached to the section 2-15 are oriented in different directions. Further, as shown in FIGS. 5B and 6B, the section 2-11 and the section 2-14 of the mounting member 2 are convex (specifically, convex when viewed from below). Is bent. As a result, the LED module 1-13 attached to the section 2-13 and the LED module 1-15 attached to the section 2-15 are the LED modules 1-1, 1-2, 1-3, 1- 4, 1-6, 1-7, 1-8, 1-9, 1-10, 1-12 are directed in different directions.

  As shown in FIGS. 5A and 5B, the section 2-16, the section 2-17, and the section 2-18 of the attachment member 2 are bent in two stages to form a concave shape ( In detail, it is formed in a concave shape when viewed from below. As a result, the LED module 1-16 attached to the section 2-16 and the LED module 1-18 attached to the section 2-18 are oriented in different directions. Furthermore, the angle at which the sections 2-13 and 2-15 are bent with respect to the section 2-14 of the mounting member 2, and the angle at which the sections 2-16 and 2-18 are bent with respect to the section 2-17 of the mounting member 2 And are set to different values. As a result, the LED module 1-16 attached to the section 2-16 and the LED module 1-18 attached to the section 2-18 are LED modules 1-1, 1-2, 1-3, 1- 4, 1-6, 1-7, 1-8, 1-9, 1-10, 1-12, 1-13, 1-15 are directed in different directions.

  FIG. 7 is an overall view of the illumination device 10 according to the first embodiment. Specifically, FIG. 7A is a front view of the lighting device 10 of the first embodiment, and FIG. 7B is a left side view of the lighting device 10 of the first embodiment.

  In FIG. 7, reference numeral 4 denotes a support for supporting the mounting member 2 shown in FIGS. 5 and 6. 1-1R shows the right edge (upper edge of FIG. 4) of the light distribution pattern of the light emitted from the LED module 1-1 shown in FIGS. 5 (A) and 5 (B). 1-3L shows the left edge part (lower edge part of FIG. 4) of the light distribution pattern of the light emitted from the LED module 1-3 shown in FIGS. 5 (A) and 5 (B).

  Moreover, in FIG. 7, L1-2 has shown the main optical axis line of LED module 1-2 shown to FIG. 5 (A), FIG. 5 (B), and FIG. 6 (B). L1-8 indicates the main optical axis of the LED module 1-8 shown in FIGS. 5A, 5B, and 6B. θ1-2 represents an angle formed by the main optical axis L1-2 of the LED module 1-2 and the horizontal plane HL (see FIG. 6B). θ1-8 represents an angle formed by the main optical axis L1-8 of the LED module 1-8 and the horizontal plane HL (see FIG. 6B). 1-2F has shown the front edge part (right edge part of FIG. 4) of the light distribution pattern of the light irradiated from LED module 1-2. Reference numeral 1-16B denotes a rear edge portion (left edge portion in FIG. 4) of the light distribution pattern of light emitted from the LED module 1-16 shown in FIGS. 5A and 5B.

  In the illuminating device 10 of the first embodiment, as shown in FIGS. 5 to 7, the attachment member 2 is attached to the support column 4 via a part of the lamp umbrella 3, but the illumination of the third embodiment In the apparatus 10, instead, the attachment member 2 can be directly attached to the column 4, or the attachment member 2 can be attached to the column 4 via a member other than the lamp umbrella 3.

  As described above, in the illumination device 10 of the first embodiment, the phosphorescent material is disposed on the reflection surface 1b1 (see FIG. 3) for reflecting the light from the LED 1a1 (see FIG. 2) and the phosphor 1a2. . Therefore, according to the illumination device 10 of the first embodiment, the light stored in the phosphorescent material when the LED 1a1 is turned on (specifically, the light from the LED 1a1 and the phosphor 1a2, and, for example, sunlight, other lighting fixtures) Light from the outside of the illumination device 10 such as light from the LED 1a1 can be irradiated. Thereby, auxiliary light can be irradiated when the LED 1a1 is OFF. In other words, according to the illuminating device 10 of 1st Embodiment, the power consumption of LED1a1 can be reduced.

  In the illumination device 10 of the first embodiment, the phosphor 1a2 (see FIG. 2) is selected mainly for color reproducibility and high luminance. Therefore, according to the illuminating device 10 of 1st Embodiment, three, energy saving, color reproducibility, and high brightness | luminance, can be achieved simultaneously.

  Furthermore, in the illuminating device 10 of 1st Embodiment, as shown in FIG. 3, the phosphorescent material is apply | coated to the reflective surface 1b1 of the reflector 1b by mesh shape, As a result, 1b1a by which the phosphorescent material is arrange | positioned, A portion 1b1b where no phosphorescent material is disposed is provided on the reflecting surface 1b1 of the reflector 1b. In other words, in the illuminating device 10 of 1st Embodiment, the phosphorescent material is not arrange | positioned in the whole surface of the reflective surface 1b1, but the part 1b1b in which a luminous material is not arrange | positioned remains on the reflective surface 1b1.

  Therefore, according to the illuminating device 10 of 1st Embodiment, the reflectance of the reflective surface 1b1 can be made higher than the case where the luminous material is arrange | positioned in the whole surface of the reflective surface 1b1. In other words, according to the illuminating device 10 of 1st Embodiment, when LED1a1 is ON, a possibility that the reflected light from the reflective surface 1b1 may become weak can be reduced.

  That is, according to the illuminating device 10 of the first embodiment, it is possible to irradiate auxiliary light when the LED 1a1 is OFF, while reducing the possibility that the reflected light from the reflecting surface 1b1 becomes weak when the LED 1a1 is ON. it can.

  Furthermore, in the illuminating device 10 of 1st Embodiment, as shown in FIGS. 1-3, the thermal interface material 1d and reflector 1b which have a heat-transfer function are arrange | positioned between LED1a1 and fluorescent substance 1a2, and a phosphorescent material. ing. In other words, in the illuminating device 10 of 1st Embodiment, LED1a1, fluorescent substance 1a2, and the luminous material are thermally connected. In detail, in the illuminating device 10 of 1st Embodiment, the function as a heat sink is provided in the thermal interface material 1d and the reflector 1b which are arrange | positioned between LED1a1, fluorescent substance 1a2, and a luminous material.

  Therefore, according to the illuminating device 10 of 1st Embodiment, the temperature of a phosphorescent material can be improved with the heat | fever which LED1a1 generate | occur | produced, and, thereby, the emitted light intensity of a phosphorescent material can be improved.

  FIG. 8 is an enlarged view of the LED package 1a, the reflector 1b, and the thermal interface material 1d of the lighting device according to the fourth embodiment. Specifically, FIG. 8A is an enlarged cross-sectional view of the LED package 1a, the reflector 1b, and the thermal interface material 1d of the illumination device according to the fourth embodiment as viewed from the front. FIG. 8B is a bottom view thereof, that is, a view of them as seen from the lower side of FIG.

  In the illumination device of the fourth embodiment, as shown in FIG. 8A and FIG. 8B, a portion 1b1a where the phosphorescent material is arranged and a phosphorescent material are arranged on the reflecting surface 1b1 of the reflector 1b. A portion 1b1b that is not provided is provided.

  In detail, in the illuminating device 10 of 1st Embodiment, as shown to FIG. 3 (A) and FIG. 3 (B), it is phosphorescent by apply | coating a phosphorescent material to the reflective surface 1b1 of the reflector 1b in mesh shape. Although the part 1b1a in which the material is arranged is formed, instead of the illumination device of the fourth embodiment, as shown in FIGS. 8A and 8B, the reflecting surface 1b1 of the reflector 1b is used. The portion 1b1a where the phosphorescent material is disposed is formed by applying the phosphorescent material in a dot shape.

  FIG. 9 is an enlarged view of the LED package 1a, the reflector 1b, the thermal interface material 1d, and the like of the lighting apparatus of the fifth embodiment. Specifically, FIG. 9A is an enlarged cross-sectional view of the LED package 1a, the reflector 1b, the thermal interface material 1d, and the like of the illumination device according to the fifth embodiment as viewed from the front. FIG. 9B is a bottom view thereof, that is, a view of them as seen from the lower side of FIG.

  In the illuminating device 10 of 1st Embodiment, as shown to FIG. 3 (A) and FIG. 3 (B), a phosphorescent material is arrange | positioned by apply | coating a phosphorescent material to the reflective surface 1b1 of the reflector 1b in mesh shape. However, in the illumination device of the fifth embodiment, instead of a net-like sheet 1g containing a phosphorescent material, as shown in FIGS. 9A and 9B, By pasting on the reflecting surface 1b1 of the reflector 1b, a portion where the phosphorescent material is disposed is formed.

  As a result, in the illuminating device of the fifth embodiment, similarly to the illuminating device 10 of the first embodiment, the portion (1g) where the phosphorescent material is disposed on the reflecting surface 1b1 of the reflector 1b, and the phosphorescent material The part which is not arrange | positioned is provided.

  FIG. 10 is an enlarged view of the LED package 1a, the reflector 1b, the thermal interface material 1d, and the like of the lighting apparatus according to the sixth embodiment. Specifically, FIG. 10A is an enlarged cross-sectional view of the LED package 1a, the reflector 1b, the thermal interface material 1d, and the like of the lighting apparatus according to the sixth embodiment as viewed from the front. FIG. 10B is a bottom view thereof, that is, a view of them as viewed from the lower side of FIG.

  In the illuminating device 10 of 1st Embodiment, as shown to FIG. 3 (A) and FIG. 3 (B), a phosphorescent material is arrange | positioned by apply | coating a phosphorescent material to the reflective surface 1b1 of the reflector 1b in mesh shape. However, in the illuminating device of the sixth embodiment, as shown in FIGS. 10 (A) and 10 (B), instead of the luminous material, a sheet 1i having a hole 1i1 is used. A portion where the phosphorescent material is disposed is formed by covering the inner peripheral surface 1b2 of the reflector 1b to which is applied.

  Specifically, in the illumination device of the sixth embodiment, the LED 1a1 (see FIG. 2) and the phosphor 1a2 are caused by the phosphorescent material on the inner peripheral surface 1b2 of the reflector 1b exposed through the hole 1i1 of the sheet 1i. Of light is stored. In addition, a portion 1i2 of the inner peripheral surface of the sheet 1i where the hole 1i1 is not opened has a mirror shape, and has a function of reflecting light from the LED 1a1 and the phosphor 1a2 when the LED 1a1 is turned on.

  As a result, in the illuminating device of the sixth embodiment, similarly to the illuminating device 10 of the first embodiment, the portion (1b2, 1i1) in which the phosphorescent material is disposed on the reflecting surface of the reflector 1b, and the phosphorescent material And a portion (1i2) in which is not arranged.

  FIG. 11 is an enlarged view of the reflector 1b of the illumination device according to the seventh embodiment. Specifically, FIG. 11A is an enlarged cross-sectional view of the reflector 1b of the illumination device according to the seventh embodiment as viewed from the front. FIG. 11B is a bottom view thereof, that is, a view of the bottom view from the lower side of FIG.

  In the illuminating device 10 of 1st Embodiment, as shown to FIG. 3 (A) and FIG. 3 (B), a phosphorescent material is arrange | positioned by apply | coating a phosphorescent material to the reflective surface 1b1 of the reflector 1b in mesh shape. However, in the illumination device of the seventh embodiment, instead of the material (phosphorescent material) to which the phosphorescent material is added, as shown in FIGS. 11 (A) and 11 (B) By forming the reflector 1b with a material having a content ratio of higher than 0% and lower than 100%, a portion where the phosphorescent material is disposed is formed on the reflecting surface 1b1 of the reflector 1b. In detail, in the illuminating device of 11th Embodiment, the reflector 1b is shape | molded with the high reflectance white resin material to which the luminous material was added.

  As a result, in the illuminating device of the seventh embodiment, similarly to the illuminating device 10 of the first embodiment, the portion where the phosphorescent material is disposed and the phosphorescent material are disposed on the reflecting surface 1b1 of the reflector 1b. And no part is provided.

  According to the illuminating device of the seventh embodiment, the same effects as those of the illuminating devices of the first to sixth embodiments can be obtained without applying or sticking a phosphorescent material.

  Hereinafter, an eighth embodiment of the illumination device of the present invention will be described. FIG. 12 is a cross-sectional view of the illumination device of the eighth embodiment. In FIG. 12, reference numeral 10a denotes an LED package configured similarly to the LED package 1a shown in FIG. Reference numeral 10b denotes a reflector having a reflecting surface for reflecting light emitted from the LED package 10a upward (upper side in FIG. 12). Reference numeral 10c denotes a lens attached to the reflector 10b in order to control light distribution of direct light from the LED package 10a and reflected light from the reflecting surface of the reflector 10b.

  In FIG. 12, reference numeral 10d denotes a thermal interface material for radiating or conducting heat generated by the LED package 10a. Reference numeral 10e denotes a housing for supporting the reflector 10b and the thermal interface material 10d.

  In the illumination device according to the eighth embodiment, as shown in FIG. 12, a part of the heat generated by the LED package 10a is dissipated from the thermal interface material 10d. Further, part of the heat generated by the LED package 10a is thermally conducted to the housing 10e via the thermal interface material 10d, and is radiated from the surface of the housing 10e.

  FIG. 13 is a component diagram of the reflector 10b shown in FIG. Specifically, FIG. 13A is a plan view of the reflector 10b, and FIG. 13B is a cross-sectional view of the reflector 10b.

  In the illumination device of the eighth embodiment, as shown in FIGS. 13A and 13B, the reflecting surface 10b1 of the reflector 10b has a portion 10b1a where the luminous material is disposed and the luminous material. A portion 10b1b that is not provided is provided. Specifically, a portion 10b1a where the phosphorescent material is disposed is formed by applying the phosphorescent material on the reflecting surface 10b1 of the reflector 10b in a mesh shape. Further, a phosphorescent material is applied over the entire upper surface of the reflector 10b (the upper surface in FIG. 13B). As the phosphorescent material, for example, a fluorescent material having long persistence, light luminance, and reliability is used. Specifically, for example, those composed of rare earth activated divalent metal aluminate, those composed of rare earth activated divalent metal boric acid substituted aluminate, Eu activated and rare earth activated coactivated silicic acid A material composed of a salt or a material composed of Eu-activated rare earth oxysulfate is used as a phosphorescent material.

  Furthermore, in the illumination device of the eighth embodiment, as shown in FIG. 12, a part of the heat generated by the LED package 10a is reflected on the reflecting surface of the reflector 10b via the thermal interface material 10d, the housing 10e, and the reflector 10b. Thermal conduction is performed by the phosphorescent material on 10b1 and the phosphorescent material on the upper surface of the reflector 10b. Thereby, the temperature of the phosphorescent material is raised, and the emission intensity of the phosphorescent material is increased.

  In the illumination device of the eighth embodiment, as shown in FIG. 12, when the LED is turned on, a part of the light emitted from the LED and the phosphor is controlled by the lens 10c, and the upper side of FIG. Is irradiated. Further, when the LED is turned on, a part of the light emitted from the LED and the phosphor is reflected by the portion 10b1b of the reflecting surface 10b1 of the reflector 10b where the phosphorescent material is not disposed, and the light distribution is controlled by the lens 10c. 12 is irradiated on the upper side of FIG. Further, when the LED is turned on, a part of the light emitted from the LED and the phosphor and a part of the light that has entered the lighting device from outside the lighting device are converted into a phosphorescent material on the reflecting surface 10b1 of the reflector 10b, and It is stored by the phosphorescent material on the upper surface of the reflector 10b.

  Furthermore, in the illumination device of the eighth embodiment, as shown in FIG. 12, when the LED is turned off, the light emitted from the phosphorescent material on the reflecting surface 10b1 of the reflector 10b is radiated, and the light distribution is controlled by the lens 10c. Irradiates the upper side of FIG. Furthermore, when the LED is OFF, the light emitted from the phosphorescent material on the upper surface of the reflector 10b is emitted and irradiated on the upper side of FIG.

  Specifically, in the illumination device of the eighth embodiment, the LED is pulse-driven in consideration of the afterglow luminance of the phosphorescent material, and light emission from the phosphorescent material is used supplementarily when the LED is OFF. Thereby, energy saving is achieved.

  More specifically, in the lighting device according to the eighth embodiment, the afterglow luminance, the afterglow time, and the time to reach the saturation luminance of the phosphorescent material are taken into account, and the user of the lighting device feels blinking of the LED when the LED is OFF. The OFF period of the LED is set so that the maximum brightness of the phosphorescent material can be obtained within the range where the above is not felt.

  In the illuminating device of the eighth embodiment, as shown in FIGS. 12 and 13, a portion 10b1a in which the phosphorescent material is disposed is formed by applying the phosphorescent material in a mesh pattern on the reflecting surface 10b1 of the reflector 10b. However, in the illuminating device of the ninth embodiment, instead, a phosphorescent material is applied to the reflecting surface of the reflector in the form of dots, or a mesh-like sheet containing the phosphorescent material is attached to the reflector, or has a hole. It is also possible to form the portion where the phosphorescent material is disposed on the reflector by covering the reflective surface to which the phosphorescent material is applied with the sheet or forming the reflector with the material to which the phosphorescent material is added. .

  Hereinafter, a tenth embodiment of the illumination device of the present invention will be described. FIG. 14 is a cross-sectional view of the illumination device of the tenth embodiment. In FIG. 14, 20a shows the LED package comprised similarly to the LED package 1a shown in FIG. Reference numeral 20b denotes a reflector having a reflection surface for reflecting light from the LED package 20a upward (upper side in FIG. 14). Reference numeral 20c denotes a lens attached to the reflector 20b in order to control light distribution of direct light from the LED package 20a and reflected light from the reflecting surface of the reflector 20b. 20c1 shows the upper surface of the lens 20c, and 20c2 shows the lower surface of the lens 20c.

  In FIG. 14, reference numeral 20d denotes a first thermal interface material for radiating or conducting heat generated by the LED package 20a. Reference numeral 20j denotes a second thermal interface material for radiating or conducting heat generated by the LED package 20a. Reference numeral 20e denotes a housing for supporting the reflector 20b and the second thermal interface material 20j. Reference numeral 20e1 denotes a fin constituting a part of the housing 20e. Reference numeral 20k denotes a flexible substrate for supplying power to the LEDs of the LED package 20a.

  In the illumination device of the tenth embodiment, as shown in FIG. 14, a part of the heat generated by the LED package 20a is dissipated from the first thermal interface material 20d. Further, part of the heat generated by the LED package 20a is thermally conducted to the second thermal interface material 20j through the first thermal interface material 20d, and is radiated from the second thermal interface material 20j. Further, part of the heat generated by the LED package 20a is thermally conducted to the fins 20e1 of the housing 20e through the first thermal interface material 20d and the second thermal interface material 20j, and is radiated from the fins 20e1.

  FIG. 15 is a component diagram of the reflector 20b shown in FIG. Specifically, FIG. 15 is a plan view of the reflector 20b. In FIG. 15, 20b2 is a hole for accommodating the first thermal interface member 20d.

  In the illuminating device of the tenth embodiment, as shown in FIG. 15, the reflecting surface 20b1 of the reflector 20b is provided with a portion 20b1a where the phosphorescent material is arranged and a portion 20b1b where the phosphorescent material is not arranged. Yes. Specifically, the portion 20b1a where the phosphorescent material is disposed is formed by applying the phosphorescent material in a mesh shape to the reflecting surface 20b1 of the reflector 20b. As the phosphorescent material, for example, a fluorescent material having long persistence, light luminance, and reliability is used. Specifically, for example, those composed of rare earth activated divalent metal aluminate, those composed of rare earth activated divalent metal boric acid substituted aluminate, Eu activated and rare earth activated coactivated silicic acid A material composed of a salt or a material composed of Eu-activated rare earth oxysulfate is used as a phosphorescent material.

  Furthermore, in the illumination device of the tenth embodiment, as shown in FIG. 14, a part of the heat generated by the LED package 20a is reflected on the reflecting surface 20b1 of the reflector 20b via the first thermal interface material 20d and the reflector 20b. Heat is transferred to the upper phosphorescent material. Thereby, the temperature of the phosphorescent material is raised, and the emission intensity of the phosphorescent material is increased.

  In the illumination device of the tenth embodiment, as shown in FIGS. 14 and 15, when the LED is turned on, a part of the light emitted from the LED and the phosphor is subjected to light distribution control by the lens 20 c, and FIG. 14 is irradiated on the upper side. Further, when the LED is turned on, part of the light emitted from the LED and the phosphor is reflected by the lower surface 20c2 of the lens 20c, and then the portion 20b1b of the reflecting surface 20b1 of the reflector 20b where no phosphorescent material is arranged. Then, the light distribution is controlled by the lens 20c and irradiated on the upper side of FIG. Further, when the LED is turned on, a part of the light emitted from the LED and the phosphor and a part of the light that enters the lighting device from outside the lighting device are stored by the phosphorescent material on the reflecting surface 20b1 of the reflector 20b. It is done.

  Furthermore, in the illumination device of the tenth embodiment, as shown in FIGS. 14 and 15, the light emitted from the phosphorescent material on the reflecting surface 20b1 of the reflector 20b is emitted when the LED is OFF, and the light is distributed by the lens 20c. It is controlled and irradiated on the upper side of FIG.

  Specifically, in the illumination device of the tenth embodiment, the LED is pulse-driven in consideration of the afterglow luminance of the phosphorescent material, and light emission from the phosphorescent material is used supplementarily when the LED is OFF. Thereby, energy saving is achieved.

  More specifically, in the lighting device of the tenth embodiment, the afterglow luminance, afterglow time, and time to reach the saturation luminance of the phosphorescent material are taken into account, and the user of the lighting device feels blinking of the LED when the LED is OFF. The OFF period of the LED is set so that the maximum brightness of the phosphorescent material can be obtained within the range where the above is not felt.

  In the illumination device of the tenth embodiment, as shown in FIG. 15, a portion 20b1a where the phosphorescent material is disposed is formed by applying the phosphorescent material to the reflecting surface 20b1 of the reflector 20b in a mesh shape. In the illuminating device of the eleventh embodiment, instead, the phosphorescent material is applied to the reflecting surface of the reflector in the form of dots, or a mesh-like sheet containing the phosphorescent material is attached to the reflector, or by a sheet having holes, A portion where the phosphorescent material is disposed can be formed on the reflector by covering the reflecting surface to which the phosphorescent material is applied or by forming the reflector with a material to which the phosphorescent material is added.

  In the twelfth embodiment, the first to eleventh embodiments described above can be combined as appropriate.

  The lighting device of the present invention is applicable to, for example, road lighting, street lamps, indoor lighting, and the like.

It is the figure which showed the LED module 1 which comprises a part of illuminating device of 1st Embodiment. 2 is an enlarged cross-sectional view of the LED package 1a and the like shown in FIG. It is an enlarged view of LED package 1a, reflector 1b, and thermal interface material 1d shown in FIG. It is the figure which showed the light distribution pattern of the light irradiated from the LED module 1 shown in FIG. It is the figure which showed the lamp umbrella 3 for covering the some LED module 1 and the attachment member 2 to which the LED module 1 shown in FIG. It is the figure which showed the lamp umbrella 3 for covering the some LED module 1 and the attachment member 2 to which the LED module 1 shown in FIG. It is a general view of the illuminating device 10 of 1st Embodiment. It is an enlarged view of LED package 1a of the illuminating device of 4th Embodiment, the reflector 1b, and the thermal interface material 1d. It is an enlarged view of LED package 1a, reflector 1b, thermal interface material 1d, etc. of the illumination device of the fifth embodiment. It is an enlarged view of LED package 1a of the illuminating device of 6th Embodiment, the reflector 1b, the thermal interface material 1d, etc. FIG. It is an enlarged view of the reflector 1b of the illuminating device of 7th Embodiment. It is sectional drawing of the illuminating device of 8th Embodiment. It is component drawing of the reflector 10b shown in FIG. It is sectional drawing of the illuminating device of 10th Embodiment. It is component drawing of the reflector 20b shown in FIG.

Explanation of symbols

1 LED module 1a LED package 1a1 LED
DESCRIPTION OF SYMBOLS 1a2 Phosphor 1b Reflector 1b1 Reflecting surface 1b1a A part where a phosphorescent material is arranged 1b1b A part where a phosphorescent material is not arranged 1c Lens 1d Thermal interface material 1e Housing 1e1 Fin 1f Cover 2 Mounting member 3 Lamp umbrella 4 Prop 10 Lighting device

Claims (7)

  In a lighting device including an LED, a phosphor disposed so as to cover the LED, and a reflector having a reflecting surface for reflecting light from the LED and the phosphor, a phosphorescent material is disposed. An illuminating device characterized in that a portion and a portion where no phosphorescent material is arranged are provided on the reflecting surface.   The illuminating device according to claim 1, wherein a phosphorescent material is applied to the reflecting surface in a mesh pattern or a dot pattern.   The lighting device according to claim 1, wherein a net-like sheet including a phosphorescent material is attached to the reflecting surface.   The lighting device according to claim 1, wherein the reflector coated with the phosphorescent material is covered with a sheet having a hole.   The lighting device according to claim 1, wherein the reflector is formed of a material to which a phosphorescent material is added.   The lighting device according to any one of claims 1 to 5, wherein a heat transfer member is disposed between the LED and the phosphor and the phosphorescent material.   The lighting device according to claim 6, wherein a heat sink is disposed between the LED and the phosphor and the phosphorescent material.

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