JP6128488B2 - LED lighting device and lighting fixture - Google Patents

Description

  The present invention relates to an LED lighting device and a lighting fixture including the same.

  In recent years, various light sources have been made into LEDs, and various illumination devices (LED illumination devices) using LEDs have been proposed as illumination light sources. Among them, LED lighting devices installed on indoor ceilings are mainly used for indoor lighting such as ceiling lights, and for indoor lighting such as spotlights and downlights. There is local illumination that illuminates the local space.

  The base illumination is, for example, an illumination device (for example, Patent Document 1) having a configuration in which a straight tube LED lamp with a built-in LED module is attached to an appliance body attached to a ceiling or the like, or an appliance body attached to the ceiling or the like There is an illumination device or the like having a configuration in which an LED module is directly installed (for example, Patent Document 2). On the other hand, as the local illumination, for example, there is an illuminating device having a configuration in which a bulb-type LED lamp or a spot-type LED lamp is attached to an appliance body attached to a ceiling or the like.

  Since the base illumination and the local illumination have different illumination applications, the required brightness differs. For example, since the local illumination mainly aims to brighten the local space, a low luminous flux of 1000 lm (lumen) or less is sufficient. On the other hand, since the main purpose of the base illumination is to brighten the entire indoor space, generally a light flux of 1800 lm or more is required.

JP 2011-171077 A JP 2011-171226 A

  As described above, since the base illumination illuminates the entire space, there are various types of irradiated objects illuminated by the base illumination, such as food and drink, human skin, interior, and clothing. Therefore, it has not been understood what the color rendering performance should be designed based on the conventional base illumination.

  The present invention enables design of color rendering performance suitable for base lighting, and an object of the present invention is to provide an LED lighting device and a lighting fixture capable of securing a red appearance suitable for specifications and applications. .

  The reason for focusing on the appearance of red is that the appearance of red is often regarded as important in the appearance of various articles, and also the appearance of red in the appearance of human skin color. This is because of the strong correlation.

In order to achieve the above object, one embodiment of the LED lighting device according to the present invention is an LED lighting device having a total luminous flux of 1800 lm or more, and corresponds to a red color chart (U ^* , V ^* ) chromaticity diagram. , The chromaticity point of the reference light source is (U ^* ₀ , V ^* ₀ ), the chromaticity point when the LED illumination device is the sample light source is (U ^* ₁ , V ^* ₁ ), the origin and the reference The length of the first line segment connecting the chromaticity point of the light source is L ₀ , the length of the second line segment connecting the origin and the chromaticity point of the sample light source is L _1, and the first line segment The angle formed by the second line segment is θ (°), and L ₀ = ((U ^* ₀ ) ² + (V ^* ₀ ) ² ) ^1/2 , L ₁ = ((U ^* ₁ ) ² + ( _{^{V * 1) 2) 1/2,}} θ = | tan -1 (V * 0 / U * 0) -tan -1 (V * 1 / U * 1) | × (180 / π), α = L / L _0, and the while, 0 ≦ θ ≦ 1 °, and characterized by satisfying the relation of 0.88 ≦ alpha.

  Further, in one embodiment of the LED lighting device according to the present invention, the relationship of α ≦ 1.04 may be further satisfied.

  Further, in one embodiment of the LED lighting device according to the present invention, the relationship of 0.92 ≦ α may be further satisfied.

  Further, in one embodiment of the LED lighting device according to the present invention, the relationship 0.92 ≦ α ≦ 1.04 may be further satisfied.

  Further, in one embodiment of the LED lighting device according to the present invention, the relationship 0.95 ≦ α ≦ 1.04 may be further satisfied.

  Moreover, the one aspect | mode of the LED lighting apparatus which concerns on this invention is good also as providing an LED module and the instrument main body by which the said LED module is installed.

  Moreover, the one aspect | mode of the LED lighting apparatus which concerns on this invention WHEREIN: The said LED lighting apparatus is good also as a straight tube | pipe LED lamp with which the LED module was incorporated.

  Moreover, the one aspect | mode of the LED lighting apparatus which concerns on this invention WHEREIN: The said LED module is good also as comprising a board | substrate and the light emitting element mounted in the said board | substrate.

  Moreover, in one aspect of the LED lighting device according to the present invention, the light emitting element is an LED chip, and the LED module further includes a sealing member formed on the substrate so as to cover the LED chip. It is good.

  Alternatively, in an aspect of the LED lighting device according to the present invention, the light emitting element includes a container, an LED chip disposed in the container, and a sealing member formed in the container so as to cover the LED chip. It is good also as having.

  Moreover, the one aspect | mode of the LED lighting apparatus which concerns on this invention WHEREIN: The said sealing member is good also as including the wavelength conversion material which converts the wavelength of the light which the said LED chip emits.

  Moreover, the one aspect | mode of the lighting fixture concerning this invention is provided with the said LED lighting apparatus which is a straight tube | pipe LED lamp, and the fixture main body with which the said LED lighting apparatus is mounted | worn, It is characterized by the above-mentioned.

  According to the present invention, a color rendering performance suitable for base illumination can be designed. In particular, it is possible to ensure a red appearance suitable for the specifications and applications.

(U ^* , V ^* ) chromaticity diagram corresponding to the red color chart The figure which shows the 1st range in the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart of the LED lighting apparatus which concerns on embodiment of this invention The figure which shows the 2nd range in the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart of the LED lighting apparatus which concerns on embodiment of this invention The figure which shows the 3rd range in the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart of the LED lighting apparatus which concerns on embodiment of this invention The figure which shows the 4th range in the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart of the LED lighting apparatus which concerns on embodiment of this invention The figure which shows the 5th range in the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart of the LED lighting apparatus which concerns on embodiment of this invention The figure which shows the usage example of the LED lighting apparatus which concerns on embodiment of this invention. The figure which shows the structure of the 1st LED lighting apparatus which concerns on embodiment of this invention. The figure which shows the structure of the lighting fixture using the 1st LED lighting apparatus which concerns on embodiment of this invention. The figure which shows the structure of the 2nd LED lighting apparatus which concerns on embodiment of this invention. The figure which shows the structure of the 3rd LED lighting apparatus which concerns on embodiment of this invention. The figure which shows the structure of the 4th LED lighting apparatus which concerns on embodiment of this invention. The figure which shows the structure of the LED module which concerns on embodiment of this invention. The figure which shows the structure of the LED module which concerns on a modification.

(Knowledge that became the basis of the present invention)
In recent years, LED lighting devices have gradually progressed in the appearance of the irradiated object, and the feeling of discomfort with existing light sources such as fluorescent lamps has been considerably reduced. Many.

  In particular, although the appearance of red is regarded as important in the illumination device, the design point for making the red-colored irradiated object look good is unclear for the LED illumination device used as the base illumination.

  In other words, unlike local lighting that illuminates a part of the living space locally, the base lighting illuminates the entire living space, so that the appearance of all irradiated objects in the space including the appearance of human skin color is balanced. Lighting is required.

  For this reason, when illuminating a plurality of irradiated objects at the same time and designing the color rendering performance based on one irradiated object, the appearance of other irradiated objects may become unnatural.

  For example, when an LED lighting device that can show red color very vividly is used to illuminate a red food such as a tomato or a red interior accessory of a store, it will be seen as preferable. However, when the same LED lighting device is used to illuminate the skin of a person, the redness of the skin is emphasized more than necessary.

  As described above, it is not known what base color rendering performance should be designed for the base lighting, and such a color rendering performance design method has not been known.

  By the way, how the color of an object looks can be expressed as color rendering performance (color rendering). In the evaluation of the color rendering properties of the illumination light source, there is an index called an average color rendering index Ra, and in addition, there is a special color rendering index R9 as an index indicating the fidelity of the vivid red appearance. In this case, the red appearance tends to be considered better as the value of R9 is higher. Therefore, it is considered that it is possible to use R9 to design the red-line irradiated object so as to be shown favorably.

  However, it is insufficient to evaluate the appearance of red with only the value of R9. The reason will be described below.

  When the object is illuminated with the reference light source and the sample light source, the special color rendering evaluation index Ri including R9 is calculated by the following equation.

  Ri = 100-4.6 × ΔEi

  Here, ΔEi indicates the difference in color appearance between the sample light source and the reference light source.

  That is, R9 only indicates the difference in appearance from the reference light source, and the direction of color misregistration, that is, saturation and hue, and the direction and amount of each change cannot be determined. For example, even if there are two types of sample light sources of R9 = 10, the two sample light sources only have the same color shift from the reference light source, and red may appear duller than the reference light source. If present, it may look brighter than the reference light source.

  In fact, some high-pressure sodium lamps show a very red color despite the small value of R9 = −18. This is considered that the value of R9 is small because the color is shifted in a brighter direction than the reference light source.

  As described above, there is no known method for defining an appropriate red appearance for the conventional LED illumination device serving as the base illumination, and an appropriate red appearance according to the specification and application of the LED illumination device is not known. Could not be realized.

  In other words, with regard to LED lighting devices used in general living spaces such as homes, offices, schools, stores, etc., or spaces where relatively precise color appearance is required, such as museums and museums, each specification and each Although it is considered that there is a desired color rendering performance depending on the application, the conventional LED lighting devices have not been able to realize the desired color rendering performance depending on the specifications and applications.

As a result of intensive studies on such problems, the inventors of the present application have determined the appearance of an appropriate red system by defining the range of the coordinate space using the (U ^* , V ^* ) coordinate system instead of R9. I found out that it can be defined.

Specifically, it was first confirmed that the appearance of red was strongly related to the position on the chromaticity coordinates (U ^* , V ^* ). It was also clarified that even if the value of R9 is the same, the appearance of red may be different depending on the case. In addition, when discussing the preference of red appearance, the relative positional relationship between each test light color and the corresponding chromaticity coordinates (U ^* , V ^* ) of the reference light source is important. I found.

(Outline of the present invention)
Hereinafter, an epoch-making method for defining an appropriate red appearance found by the inventors of the present invention will be described for the LED illumination device as the base illumination. Note that the base illumination generally has a total luminous flux of 1800 lm or more for the purpose.

FIG. 1 shows a (U ^* , V ^* ) chromaticity diagram corresponding to a red color chart for an LED illumination device as one of the constituent units.

In FIG. 1, the chromaticity point of the reference light source is (U ^* ₀ , V ^* ₀ ), and the chromaticity point when the LED illumination device is the sample light source (test light source) is (U ^* ₁ , V ^* ₁ ). and then, the origin 0 and the chromaticity point of the reference light source (U * ^0, _V * _⁰⁾ and (distance from the chromaticity point of the reference light source origin) the length of the first segment LX connecting the L _0, the origin 0 and the chromaticity point of the sample light source _^(U * ^{1, V} _{* 1)} and the connecting length of the second segment LY (distance from the origin of the chromaticity point of the sample light source) and _{L 1,} a first line segment An angle formed by X and the second line segment Y is defined as θ (°). In this case, L ₀ , L ₁ , θ, and α can be expressed by the following equations.

L ₀ = ((U ^* ₀ ) ² + (V ^* ₀ ) ² ) ^1/2
L ₁ = ((U ^* ₁ ) ² + (V ^* ₁ ) ² ) ^1/2
θ = | tan ⁻¹ (V ^* ₀ / U ^* ₀ ) −tan ⁻¹ (V ^* ₁ / U ^* ₁ ) | × (180 / π)
α = L ₁ / L ₀

Here, the coordinates in the (U ^* , V ^* ) chromaticity diagram of FIG. 1 are U ^* values and V ^* values determined by the U ^* V ^* W ^* color space (CIE1964 color space) defined by CIE in 1964. Is taken. A specific calculation formula for calculating the corresponding (U ^* , V ^* ) coordinates from the spectral distribution of the light source is based on JIS. In the (U ^* , V ^* ) chromaticity diagram of FIG. 1, the chromaticity point of the reference light source is a chromaticity point when the color rendering index R9 is 100 (Ra = 100). The reference light source is a light source having a reference spectral distribution when evaluating the color rendering performance of the light source. For example, a light source that simulates a light bulb or daylight is defined by JIS8720.

When evaluating the color rendering performance of a light source for illumination, it should be discussed with “hue” and “saturation”, which are two elements of color appearance, but (U ^* , V ^{* in} FIG. 1). ) Since the chromaticity of the sample light source can be defined by the chromaticity diagram, "hue" and "saturation" can be shown separately. That is, in R9, “hue” and “saturation” cannot be individually evaluated quantitatively, but by using (U ^* , V ^* ) chromaticity diagram, “hue” and “saturation” Each can be evaluated individually and quantitatively.

Specifically, “hue” is a type of color such as red, green, and blue, and is defined by an angle θ in the circumferential direction on the (U ^* , V ^* ) chromaticity diagram of FIG. Can be expressed as a characteristic. “Saturation” is the vividness of the color, and can be expressed as a distance (length) from the origin 0 on the (U ^* , V ^* ) chromaticity diagram of FIG.

Based on such knowledge, the inventors of the present application have the following important points when defining an appropriate red appearance using the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart. I found out.

First, in the (U ^* , V ^* ) chromaticity diagram of FIG. 1, in order to define an appropriate appearance of red, the angle θ needs to be equal to or smaller than a certain angle. This is because if the angle θ is too large, the difference in “hue” becomes large and looks unnatural.

Second, it is necessary that α (= L ₁ / L ₀ ) be in a certain range. α is a parameter related to “saturation”, but if α is too small, “saturation” will be insufficient and the appearance will be poor, while if α is too large, “saturation” will be too high, This is because it looks natural and is not preferable.

  Hereinafter, the range of the angles θ and α according to the specifications and applications of the LED lighting device will be described with reference to FIGS.

2 is a (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart in FIG. 1, and the chromaticity point of the LED lighting device is 0 ≦ θ ≦ 1 ° and 0.88 ≦ α. The case where it is defined to satisfy the relationship is shown. Note that the range of θ represents an angle in any of the counterclockwise and clockwise directions around the origin. The same applies to the range of θ.

  By defining the relationship so as to satisfy the above relationship, it is possible to secure the necessary red appearance to such an extent that there is no practical problem in general living spaces such as general homes, offices, and schools. That is, the hue shift can be suppressed within an appropriate range, and red saturation can be secured to a practically satisfactory level.

  In FIG. 2, the chromaticity point of α = 0.88 in the first line segment LX corresponds to R9 = 37.

3 is a (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart in FIG. 1, and the chromaticity point of the LED illumination device is 0 ≦ θ ≦ 1 ° and 0.88 ≦ α ≦. The case where it has prescribed | regulated so that the relationship of 1.04 may be shown is shown. That is, in FIG. 2, it is a case where it is further defined to satisfy the relationship of α ≦ 1.04.

  By defining the relationship so as to satisfy the above relationship, it is possible to ensure a more preferable appearance of red in use in general living spaces such as general homes, offices, and schools as compared to the case of FIG. That is, the hue shift can be suppressed within an appropriate range, the red saturation can be secured to the extent that there is no problem, and an excessive increase in saturation can be suppressed.

  Furthermore, by setting α ≦ 1.04, it is possible to suppress a difference in appearance from an existing light source, and thus it is possible to realize a color rendering performance that can be felt more naturally and comfortably. This point will be described below.

  Conventionally, when a person determines the color preference of an object, attention has been paid to how the color is seen with natural light. It was found that the color appearance with an artificial light source such as a lamp is also important.

  Conventionally, not only natural light sources but also artificial light sources such as three-wavelength fluorescent lamps exist as light sources for forming an illumination space, and humans are not only under natural light but also artificial light sources such as three-wavelength fluorescent lamps. This is because they are also familiar with the lighting environment under the hood. In other words, because people are used not only to see colors with natural light, but also with artificial light sources, the differences between not only natural light but also artificial light sources are too large. It is important not to.

  Here, consider a three-wavelength fluorescent lamp that has been most widely used as a base illumination. The appearance of red under the three-wavelength fluorescent lamp is generally in a direction in which the saturation is smaller than the appearance of red under natural light (for example, a range of α <1). Specifically, in the case of a three-wavelength fluorescent lamp, α≈0.84. Therefore, basically, α closer to 1 gives a feeling closer to natural light, but if α deviates from 1, α deviates in a direction smaller than 1 than α deviates in a direction larger than 1. Is more likely to be accepted as a preferred appearance. That is, when α is larger than 1, it is in a direction away from natural light and an artificial light source such as a three-wavelength fluorescent lamp.

  Therefore, by setting α ≦ 1.04, it is possible to suppress a difference in appearance from an existing light source and to realize more natural color rendering performance. Thereby, when considering replacement with an existing light source such as a three-wavelength fluorescent lamp, the difference from the appearance with the existing light source does not become extremely large, so that the existing light source can be replaced with the LED illumination device without a sense of incongruity. .

FIG. 4 is a (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart in FIG. 1, and the chromaticity point of the LED illumination device is 0 ≦ θ ≦ 1 ° and 0.92 ≦ α. The case where it is defined to satisfy the relationship is shown. In other words, this is a case where the relationship of 0.92 ≦ α is further defined in FIG.

  By defining the relationship so as to satisfy the above relationship, it is possible to secure a desirable red appearance in a use such as a store or an amusement facility in a more preferable space where it is desired to express colors more vividly. That is, the hue shift can be suppressed within an appropriate range, and red saturation can be secured to the extent that there is no problem in consideration of the application.

  In FIG. 4, the chromaticity point of α = 0.92 in the first line segment LX corresponds to R9 = 55.

FIG. 5 is a (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart in FIG. 1, and the chromaticity point of the LED lighting device is 0 ≦ θ ≦ 1 ° and 0.92 ≦ α ≦. The case where it has prescribed | regulated so that the relationship of 1.04 may be shown is shown. That is, in FIG. 4, it is a case where it is further defined to satisfy the relationship of α ≦ 1.04.

  By prescribing to satisfy the above relationship, it is desirable to use a red color that is desirable for stores and amusement facilities. It becomes possible to secure the appearance. That is, the hue shift can be suppressed within an appropriate range, the red saturation can be secured to the extent that there is no problem in consideration of the application, and an excessive increase in saturation can be suppressed.

  Furthermore, by setting α ≦ 1.04, it is possible to suppress a difference in appearance from an existing light source, and thus it is possible to realize a color rendering performance that can be felt more naturally and comfortably.

6 is a (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart in FIG. 1, and the chromaticity point of the LED illumination device is 0 ≦ θ ≦ 1 ° and 0.95 ≦ α ≦. The case where it has prescribed | regulated so that the relationship of 1.04 may be shown is shown. That is, in FIG. 3 or FIG. 5, it is further defined to satisfy the relationship of 0.95 ≦ α ≦ 1.04.

  By prescribing so as to satisfy the above relationship, it is possible to secure a desirable red appearance in applications such as art museums, museums, color inspection halls, etc. that require more accurate color appearance. Become. That is, it is possible to suppress a hue shift within an appropriate range and to secure necessary and sufficient saturation.

  In FIG. 6, the chromaticity point of α = 0.95 in the first line segment LX corresponds to R9 = 74.

(Embodiment)
Hereinafter, more specific embodiments of the LED lighting device will be described with reference to the drawings. However, each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

[Specific Configuration of LED Lighting Device]
The LED lighting device according to the present embodiment is a relatively wide space in a building, such as a general household room, an office, a public facility such as a school, a store, an amusement facility, an art museum, a museum, a color inspection hall, or a factory / warehouse. For example, the total luminous flux when it is turned on with an input power of 13 W is 1800 lm or more.

  FIG. 7 is a diagram illustrating a usage example of the LED lighting device 1 according to the embodiment of the present invention.

  As shown in FIG. 7, the LED lighting device 1 is attached to, for example, a ceiling 3 of a room 2 in a building, illuminates the entire space of the room 2 as base lighting, and brightens the entire room. Therefore, the illumination light emitted from the LED illumination device 1 is irradiated to the entire indoor space of the room 2.

In the LED lighting device 1 according to the present embodiment, θ and α in the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart are related to the relationship shown in FIGS. It is set to satisfy.

  Thereby, according to the specification and application of the room (space) 2, an LED lighting device having desirable color rendering performance can be realized.

As will be described later, the chromaticity point in the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart in the LED lighting device 1 is contained in, for example, the sealing member 13 of the LED module 10. Adjustments can be made by changing the type and amount of the phosphor.

  A specific example of such an LED lighting device 1 will be described with reference to FIGS. 8-12 is a figure which shows the specific example of the LED lighting apparatus which concerns on embodiment of this invention.

  FIG. 8 illustrates a straight tube LED lamp 110 as the first LED illumination device.

  As shown in FIG. 8, the straight tube LED lamp 110 is a straight tube LED lamp used as an alternative illumination of a straight tube fluorescent lamp that is an existing light source, and includes a long cylindrical straight tube 111, The LED module 10 built in the straight pipe 111 and a pair of caps 112 provided at both ends of the straight pipe 111 are provided. In the present embodiment, the straight tube LED lamp 110 having the total length of the straight tube 111 of about 1.2 m, the input power of 26 W, and the total luminous flux of 2800 lm is used.

  The straight tube 111 is a glass tube made of glass or a plastic tube made of translucent resin. In order to diffuse the light of the LED module 10 when passing through the straight tube 111, a milky white light diffusion film or the like may be formed on the inner surface of the straight tube 111.

  The base 112 has a cap-shaped base body made of resin or metal and a base pin fixed to the base body. In the case of the one-side power feeding method, one of the pair of bases 112 is a power feeding base, the other of the pair of bases 112 is a non-power feeding base, and in the case of the both-side power feeding method, both of the pair of bases 112 are both power feeding bases. It is. In the present embodiment, the base 112 is an L-shaped base, but a G13 base or the like may be used.

  FIG. 9 shows a lighting fixture 100 using the straight tube LED lamp 110 shown in FIG. As shown in FIG. 9, the lighting fixture 100 in the present embodiment is a straight tube LED lamp mounted base light, and is a separate type LED base light constituted by a straight tube LED lamp 110 and a fixture main body 120.

  The instrument main body 120 holds the straight tube LED lamp 110. A pair of sockets 121 are attached to the instrument body 120.

  The pair of sockets 121 are electrically connected to the straight tube LED lamp 110 and hold the straight tube LED lamp 110. Specifically, each of the caps 112 at both ends of the straight tube LED lamp 110 is attached to each of the pair of sockets 121.

  In addition, the appliance main body 120 incorporates a power supply circuit (not shown) for controlling lighting of the straight tube LED lamp 110. For example, the power supply circuit converts AC power (for example, AC 100 V) from a commercial power source into DC power, and the DC power is supplied to the straight tube LED lamp 110. As a result, the straight tube LED lamp 110 is turned on, and illumination light is emitted from the straight tube LED lamp 110.

  The instrument main body 120 configured as described above is formed by, for example, pressing an aluminum steel plate, and is fixed to the ceiling via a fixture, for example. The inner surface of the instrument main body 120 may be a reflecting surface that reflects light emitted from the straight tube LED lamp 110 in a predetermined direction (for example, downward). Further, a translucent cover member may be provided so as to cover the straight tube LED lamp 110.

  FIG. 10 illustrates an integrated LED base light 210 as the second LED illumination device. As shown in FIG. 10, the integrated LED base light 210 includes the LED module 10 and an appliance body 211 on which the LED module 10 is installed, and the LED module 10 and the appliance body 211 are integrated. .

  The LED module 10 is directly attached to the attachment surface of the instrument main body 211, for example. The instrument main body 211 is, for example, a long translucent housing, and is fixed to the ceiling via a fixture, for example.

  In FIG. 11, as in FIG. 10, an integrated LED base light 310 is illustrated as the third LED lighting device. As shown in FIG. 11, the integrated LED base light 310 includes an LED module 10 and an instrument main body 311 on which the LED module 10 is installed, and the LED module 10 and the instrument main body 311 are integrated. .

  The LED module 10 is directly attached to the attachment surface of the instrument body 311, for example. Moreover, the instrument main body 311 is a rectangular (square shape) translucent housing, for example, and is fixed to the ceiling via a fixture, for example.

  In FIG. 12, an integrated LED base light 410 is illustrated as the fourth LED illumination device, as in FIG. As shown in FIG. 12, the integrated LED base light 410 includes the LED module 10, a fixture body 411 on which the LED module 10 is installed, and a translucent cover 412 that covers the LED module 10. The module 10 and the instrument main body 411 are integrated.

  The LED module 10 is directly attached to the attachment surface of the instrument body 411, for example. Moreover, the instrument main body 411 is a circular base, for example, and is fixed to the ceiling via a fixture, for example. The cover 412 has a circular shape, for example, and is fixed to the instrument body 411 so as to cover the instrument body 411.

  In this embodiment, the straight tube LED lamp-mounted base light shown in FIG. 9 and the integrated LED base light shown in FIGS. 10 to 12 are directly attached types in which the instrument body is directly attached to the ceiling or the like. An embedded type in which the instrument body is embedded in the ceiling may be used.

[LED module]
Next, the structure of the LED module 10 used as a light source of each LED lighting device will be described with reference to FIG. FIG. 13 is a diagram showing the configuration of the LED module according to the embodiment of the present invention.

  The LED module 10 is a light emitting module having a light emitting element, and emits light of a predetermined color (wavelength) such as white. The LED module 10 in the present embodiment is a BY type white LED light source that emits white light by a blue LED chip and a yellow phosphor.

  As shown in FIG. 13, the LED module 10 is a COB (Chip On Board) type light emitting module having a structure in which LED chips are directly mounted on a substrate, and includes a substrate 11 and a plurality of LEDs (bare chips) 12. And a sealing member 13 for sealing the LED 12.

  The substrate 11 is a mounting substrate (insulating substrate) for mounting the LEDs 12. 8, 10, and 11, a long rectangular substrate is used as the substrate 11. However, in the LED module 10 illustrated in FIG. 12, four substrates 11 are combined. A substrate having a donut shape is used.

  The substrate 11 is a ceramic substrate made of alumina or aluminum nitride, a resin substrate based on a resin such as an epoxy resin, a metal base substrate based on a metal such as an aluminum alloy, or a glass substrate made of glass. The substrate 11 is not limited to a rigid substrate, and a flexible substrate having flexibility may be used.

  The LED 12 is an example of a light emitting element, and is a semiconductor light emitting element that emits light with a predetermined power. A plurality of LEDs 12 are arranged on the substrate 11. For example, the LEDs 12 are arranged in a line along the longitudinal direction of the substrate 11. Note that the LEDs 12 may be arranged in a plurality of rows.

  Each LED 12 is a bare chip that emits monochromatic visible light, for example, a blue LED chip that emits blue light when energized. As the blue LED chip, for example, a gallium nitride based semiconductor light emitting device having a center wavelength of 440 nm to 470 nm, which is made of an InGaN based material, can be used.

  Each LED 12 is connected in series connection, parallel connection, or a combination of series connection and parallel connection by metal wiring (not shown) or gold wire (not shown) patterned in a predetermined shape on the substrate 11. It can be comprised so that it may become.

  The sealing member 13 is made of, for example, resin and is formed so as to cover the LED 12. For example, the sealing member 13 is formed in a linear shape so as to collectively seal one row of the plurality of LEDs 12. Note that the sealing member 13 may individually seal the LEDs 12.

  The sealing member 13 is mainly made of a translucent material. However, when it is necessary to convert the wavelength of light of the LED 12 to a predetermined wavelength, a wavelength conversion material is mixed into the translucent material.

  The sealing member 13 in the present embodiment is a wavelength conversion member that includes a phosphor as a wavelength conversion material and converts the wavelength (color) of light emitted from the LED 12. Such a sealing member 13 can be constituted by, for example, an insulating resin material (phosphor-containing resin) containing phosphor particles. The phosphor particles are excited by light emitted from the LED 12 and emit light of a desired color (wavelength). That is, the sealing member 13 is a light emitting unit having the LED 12.

  As a resin material constituting the sealing member 13, for example, a silicone resin can be used. Further, a light diffusing material such as silica may be dispersed in the sealing member 13. The sealing member 13 is not necessarily formed of a resin material, and may be formed of an inorganic material such as a low-melting glass or a sol-gel glass in addition to an organic material such as a fluorine-based resin.

  For example, when the LED 12 is a blue LED chip that emits blue light, the phosphor particles to be contained in the sealing member 13 are, for example, YAG (yttrium, aluminum, garnet) -based yellow phosphor to obtain white light. Particles can be used. Specifically, a phosphor-containing resin in which YAG-based yellow phosphor particles are dispersed in a silicone resin can be used as the sealing member 13. As a result, the yellow phosphor particles are excited by the blue light of the blue LED chip to emit yellow light. Therefore, the sealing member 13 generates white light as a combined light of the excited yellow light and the blue light of the blue LED chip. Light is emitted.

  In addition, the substrate 11 may be formed with an electrode terminal that receives direct-current power for causing the LED 12 to emit light, or a white resist for improving the insulation and reflectivity of the substrate 11.

In the LED module 10 configured as described above, for example, the color rendering performance of emitted light can be changed by changing the type and amount of the phosphor contained in the sealing member 13. That is, by adjusting the type and amount of the phosphor, the position of the chromaticity point in the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart in FIG. 1 can be changed. As an example, in the case of the above-described BY type white LED light source, color rendering can be improved by mixing a red phosphor and a green phosphor in addition to a yellow phosphor.

(Other)
As mentioned above, although the LED illuminating device and lighting fixture which concern on this invention were demonstrated based on embodiment, this invention is not limited to said embodiment.

  For example, in the above-described embodiment, the LED module 10 has a COB type configuration in which the LED chip is directly mounted on the substrate 11, but is not limited thereto. Instead of the COB type LED module 10, as shown in FIG. 14, an SMD (Surface Mount Device) type LED module 10A may be used. The LED module 10 </ b> A uses a package type LED (SMD type LED element) 12 </ b> A as a light emitting element, and can be configured by mounting a plurality of LEDs 12 </ b> A (light emitting portions) on the substrate 11. The LED 12A is formed in a container 12a (in the recess) so as to cover the LED chip 12b, a resin container (package) 12a having a recess, the LED chip 12b disposed in the container 12a (in the recess), and the LED chip 12b. And a sealing member (phosphor-containing resin) 12c.

  In the above embodiment, the LED module 10 is configured to emit white light by the blue LED chip and the yellow phosphor. However, the present invention is not limited to this. For example, instead of using a yellow phosphor, a phosphor-containing resin containing a red phosphor and a green phosphor may be used to emit white light by combining this with a blue LED chip. it can. Moreover, you may comprise so that white light may be emitted using a blue LED chip, a red LED chip, and a green LED chip, without using fluorescent substance.

  Moreover, in said embodiment, you may use the LED chip which light-emits colors other than blue as an LED chip. For example, when an ultraviolet light emitting LED chip is used, a combination of phosphor particles that emit light in three primary colors (red, green, and blue) can be used as the phosphor particles. Furthermore, a wavelength conversion material other than the phosphor particles may be used. For example, the wavelength conversion material absorbs light of a certain wavelength such as a semiconductor, a metal complex, an organic dye, or a pigment, and has a wavelength different from the absorbed light. A material containing a substance that emits light may be used.

  In the above embodiment, the LED (LED chip) is exemplified as the light emitting element. However, other solid state elements such as a semiconductor light emitting element such as a semiconductor laser or an EL element such as an organic EL (Electro Luminescence) or an inorganic EL. A light emitting element may be used.

In the above embodiment, the chromaticity point in the (U ^* , V ^* ) chromaticity diagram is changed by changing the type and amount of the phosphor. However, the present invention is not limited to this. For example, the chromaticity point in the (U ^* , V ^* ) chromaticity diagram can also be changed by changing the emission color (wavelength) of the LED chip, or adjusting the output and the number of mounted LED chips. Is possible.

  In addition, any combination of the components and functions in the embodiment and the modification can be arbitrarily combined without departing from the gist of the present invention, and the form obtained by making various modifications conceived by those skilled in the art with respect to the embodiment and the modification. The embodiment realized by the above is also included in the present invention.

DESCRIPTION OF SYMBOLS 1 LED lighting apparatus 2 Room 3 Ceiling 10, 10A LED module 11 Board | substrate 12, 12A LED
12a Container 12b LED chip 12c, 13 Sealing member 100 Lighting fixture 110 Straight tube LED lamp 111 Straight tube 112 Base 120, 211, 311, 411 Appliance body 121 Socket 210, 310, 410 Integrated LED base light 412 Cover

Claims (12)

An LED lighting device having a total luminous flux of 1800 lm or more,
In the (U ^* , V ^* ) chromaticity diagram corresponding to the red color chart, the chromaticity point of the reference light source is (U ^* ₀ , V ^* ₀ ) and the LED illumination device is the sample light source. Let the point be (U ^* ₁ , V ^* ₁ ), the length of the first line segment connecting the origin and the chromaticity point of the reference light source be L _0, and the first line connecting the origin and the chromaticity point of the sample light source. 2 segment length as L _1, the angle between the second line and the first line segment and theta (°),
L ₀ = ((U ^* ₀ ) ² + (V ^* ₀ ) ² ) ^1/2 ,
L ₁ = ((U ^* ₁ ) ² + (V ^* ₁ ) ² ) ^1/2 ,
θ = | tan ⁻¹ (V ^* ₀ / U ^* ₀ ) −tan ⁻¹ (V ^* ₁ / U ^* ₁ ) | × (180 / π),
When α = L ₁ / L ₀ ,
An LED lighting device that satisfies the relationship of 0 ≦ θ ≦ 1 ° and 0.88 ≦ α. The LED lighting device according to claim 1, further satisfying a relationship of α ≦ 1.04. The LED lighting device according to claim 1, further satisfying a relationship of 0.92 ≦ α. The LED lighting device according to claim 1, further satisfying a relationship of 0.92 ≦ α ≦ 1.04. The LED lighting device according to claim 1, further satisfying a relationship of 0.95 ≦ α ≦ 1.04. An LED module;
The LED lighting device according to claim 1, further comprising an appliance main body on which the LED module is installed. The LED illumination device according to any one of claims 1 to 5, wherein the LED illumination device is a straight tube LED lamp in which an LED module is incorporated. The LED lighting device according to claim 6, wherein the LED module includes a substrate and a light emitting element mounted on the substrate. The light emitting element is an LED chip,
The LED lighting device according to claim 8, wherein the LED module further includes a sealing member formed on the substrate so as to cover the LED chip. The LED lighting device according to claim 8, wherein the light-emitting element includes a container, an LED chip disposed in the container, and a sealing member formed in the container so as to cover the LED chip. The LED lighting device according to claim 9 or 10, wherein the sealing member includes a wavelength conversion material that converts a wavelength of light emitted from the LED chip. LED lighting device according to claim 7,
A lighting fixture comprising a fixture main body to which the LED lighting device is mounted.

Images