JP2009151967A - Led lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lamp which reduces an environmental burden by using LEDs as a light source and can exhibit effectively a crime prevention function. <P>SOLUTION: The LED lamp 1 has a plurality of LEDs 2 installed and can emit light with at least two colors or more, and is equipped with a supporting base substrate 3 which has mounting terminals 30 to be fitted in socket plug holes 72 of a lighting apparatus 71 at both end portions in longitudinal direction, a lighting substrate 4 on which a plurality of LEDs 2 are installed and are arranged between the both end portions in the longitudinal direction of the supporting base substrate 3, and a translucent member 5 which is installed on the supporting base substrate 3 so as to cover the light emitting direction of the LEDs 2 A first light-emitting part 20 which emits white color to nearly vertically downward position of the support substrate 3 and a second light-emitting part 21 which emits blue color to the outside position than the nearly vertically downward of the supporting base substrate 3 are formed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an LED lamp technology, and more particularly to an LED lamp that can be used for street lights, security lights, and the like and can emit light with at least two colors.

  Outdoor lighting fixtures such as street lights and security lights are placed on streets, intersections, parking lots and parks in urban areas. Conventionally, incandescent bulbs, mercury lamps, fluorescent lamps, and the like have been used as light source lamps for outdoor lighting fixtures. However, in recent years, lighting fixtures that use LED (Light Emitting Diode) lamps as light sources to replace incandescent bulbs and the like. Has been proposed.

As an example, Patent Document 1 discloses a lighting apparatus using a white LED as a light source, and the light emitting surface portion of a globe is formed in an uneven shape and a curved shape, thereby expanding an irradiation region of light irradiated from the LED. The lighting fixture for the purpose is disclosed (refer patent document 1).
Patent Document 2 includes a wide-angle LED irradiator, a medium-angle LED irradiator, and a narrow-angle LED irradiator, and irradiates light from different illuminators to different areas in the width direction of the sidewalk. A lighting fixture is disclosed (see Patent Document 2).

  In this way, lighting fixtures using LEDs as light sources can reduce power consumption and reduce environmental impacts such as prevention of global warming by reducing the amount of heat generated from the light sources. It is effective in the above, and is also attracting attention because of variations in durability and color development of the light source.

By the way, in recent years, environmental design for safe and secure city planning has been reviewed. Especially, regarding outdoor lighting fixtures, the outdoor lighting fixtures in the area (especially crime prevention lights) should be changed to “blue”. Thus, efforts aimed at deterring (or preventing) crime in the area are drawing attention.
The reason why crime prevention can be expected by placing a security light that emits “blue” in the area is as follows: (1) Originally, blue is a sedative effect by acting on human parasympathetic nerves, and universal (2) Blue is more visible at night due to the “Purkinje effect” compared to red and orange, so criminals can “avoid eye contact”. It is thought that the psychology that "I want" works.
And in some areas, demonstration experiments have already been attempted, and as a result, interesting results have been reported.

  However, in the configuration of a conventional outdoor lighting fixture, even if the irradiation light is simply changed to “blue”, if the irradiation light from the lamp body is a single color of blue, the sidewalk surface such as asphalt is usually dark. For this reason, there is a problem in that the contrast of the color tone becomes unbalanced and, on the other hand, pedestrians and traveling vehicles are obstructed from smooth traffic at a position almost directly below the outdoor lighting fixture. In addition, due to the unique directivity of the LED, color unevenness is likely to occur depending on the direction of irradiation, and it is difficult to visually recognize blue irradiation light from distant pedestrians and traveling vehicles, thus reducing the expected crime prevention effect. There was a problem of being done.

On the other hand, in recent years, from the viewpoint of using an LED as a light source, as disclosed in Patent Documents 3 to 5, there is an illuminating device (lamp) using an LED as a light source attached to an existing fluorescent lamp type lighting fixture. It is publicly known. In other words, these lighting devices are lamps having a plurality of LEDs as light sources, and are configured to be used in place of existing fluorescent lamps (tubes) instead of existing fluorescent lamp type lighting fixtures. Yes. Thus, by providing an LED lamp that can be attached to an existing fluorescent lamp-type lighting fixture, it is possible to reduce the power consumption of the lighting fixture and to significantly reduce the maintenance cost due to the extension of the service life. The effect is expected.
Japanese Patent No. 3498290 JP 2004-116177 A JP 2001-351402 A JP 2004-303614 A Japanese Patent No. 3987103

  Accordingly, the present invention relates to an LED lamp that solves the above-described conventional problems, and provides an LED lamp that can reduce the environmental load by using an LED as a light source and can effectively exert crime deterrent power. It is for the purpose.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, in claim 1, a plurality of LEDs are provided as a light source, an LED lamp capable of emitting light with at least two colors, and a support base provided with terminals for mounting on a lighting device at both longitudinal ends. A plurality of LEDs, and an illumination board disposed between both longitudinal ends of the support base; and a translucent member attached to the support base so as to cover the light emitting direction of the LEDs. Thus, a first light-emitting portion that emits white light at a substantially vertical lower position of the support base and a second light-emitting portion that emits blue light at a position outside the substantially vertical lower position of the support base are formed. is there.

  According to a second aspect of the present invention, the second light emitting unit is provided on a pair of edge portions facing the first light emitting unit.

  According to a third aspect of the present invention, the second light emitting unit is provided with a white LED as a light source, and transmits only light in a blue wavelength range of light emitted from the LED to a predetermined region of the translucent member. The filter layer to be made is provided.

  According to a fourth aspect of the present invention, the second light emitting unit is provided with a blue LED as a light source.

  In Claim 5, white LED is arrange | positioned as said 2nd light emission part as a light source.

  In the present invention, since an LED is used as a light source, power consumption can be suppressed, and reduction of the environmental load such as prevention of global warming by reducing the amount of heat generated from the light source can be achieved. In addition, in a state where the LED lamp of the present invention is attached to the lighting fixture, the substantially vertical lower portion of the support base emits white light, thereby preventing smooth passage of pedestrians and traveling vehicles passing under the lighting fixture. In addition, since the light is emitted in blue at a position outside the substantially vertical lower side of the support base, the lighting apparatus can be visually recognized as “blue” from a distance, and a crime deterrent effect can be expected.

Next, the best mode for carrying out the invention will be described.
1 is a perspective view showing an overall configuration of an LED lamp according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the LED lamp, FIG. 3 is a vertical cross-sectional view of the LED lamp, and FIG. FIG. 5 is a cross-sectional view showing the configuration of the first light emitting part and the second light emitting part, FIG. 6 is a side view of a security light to which the LED lamp of this embodiment is applied, and FIG. FIG. 8 is a side view, FIG. 8 is a horizontal plane illuminance distribution diagram of irradiation light emitted from a lighting fixture, FIG. 9 is a vertical sectional view of the LED lamp of the second embodiment, FIG. 10 is a transverse sectional view of the LED lamp of the third embodiment, FIG. 11 is a transverse sectional view of the LED lamp of the fourth embodiment, and FIG. 12 is a vertical sectional view of the LED lamp of the fourth embodiment.
In the following embodiments, the vertical direction in FIG. 2 is the vertical direction of the LED lamp 1, and similarly, the horizontal direction in FIG. 2 is the short direction of the LED lamp 1, and the horizontal direction in FIG. And

First, the configuration of the LED lamp 1 of the first embodiment will be described below.
As shown in FIGS. 1 to 4, the LED lamp 1 of this embodiment is an LED lamp 1 that can emit light with at least two colors, and has a plurality of LEDs 2. The plate-shaped support base 3, the illumination board 4 on which the LEDs 2, 2,... Are arranged, and the translucent translucent member 5 attached to the support base 3. A first light emitting unit 20 that emits white light at a substantially vertical lower position and a second light emitting unit 21 that emits blue light at a position outside the substantially vertical lower side of the support base 3 are formed.

  The LED lamp 1 of the present embodiment is configured as a tubular member having a substantially circular cross section that extends in the longitudinal direction as a whole. Specifically, the support base 3 is disposed on the upper side, and the illumination substrate 4 is disposed on the lower surface 3a of the support base 3 so that the light emitting surfaces of the LEDs 2. The translucent member 5 having a substantially circular cross section is attached so as to cover the light emitting surface of the LEDs 2.

  The LEDs 2, 2,... Are attached to an illumination board 4 to be described later so as to protrude from the board surface, and are arranged in a staggered pattern or a grid pattern at substantially equal intervals so as to have a predetermined pitch on the same plane. Etc. are arranged in a matrix. In this embodiment, a predetermined number (30 in this embodiment) of LEDs 2... 2 are arranged in two rows along the longitudinal direction of the LED lamp 1 (see FIG. 4).

  As the LED 2, a white LED is used, and a light emitting color of "white system" including a color tone from pure white to light gray corresponding to daylight color, day white, white, warm white or light bulb color is used. Specifically, as the LED 2 of the present embodiment, a daylight color, a daylight white, a white, a warm white or a light bulb defined in 4.2 “Chromaticity range” of JISZ9112 “Classification by light source color and color rendering of fluorescent lamp” A material that emits “white” light corresponding to a color is used.

  In particular, the LED 2 of this embodiment is preferably an LED (e.g., a so-called high power LED) that has a power consumption of 1 W or more, an ultra high luminous intensity, and excellent light emission characteristics. However, when a high power LED is used as the LED 2, the energy released as heat is large, and if such heat is accumulated in the vicinity of the LED 2, the luminous intensity is lowered and the life characteristics are deteriorated. In 1, the structure for processing appropriately the heat emitted from LED2 is provided.

  Moreover, although LED2 can use a cannonball type and a surface mount type thing, Preferably, a surface mount type thing is used. This is because the surface-mounted LED 2 has a large electrode area and a large area in contact with the illumination substrate 4, so that the generated heat can be efficiently diffused to the illumination substrate 4.

  The support base 3 is formed in the shape of a long plate in plan view, and an illumination substrate 4 to which the LEDs 2, 2. The support base 3 of the present embodiment is provided with a pair of mounting terminals 30 and 30 which are fitted in socket insertion holes 72 provided on the lighting fixture 71 side at both longitudinal ends (see FIG. 7). . The support base 3 is formed of, for example, a material such as plastic or aluminum, and is preferably formed of a metal having a high thermal conductivity (more preferably, a metal having a thermal conductivity of 200 W / (m · K) or more). The In addition, when the support base 3 is formed of aluminum, it is desirable that alumite treatment is further performed. This is because the surface area is increased and the heat dissipation effect is enhanced by subjecting the support base 3 formed of aluminum to an alumite treatment.

  The mounting terminal 30 is made of a conductive metal member, and is inserted into a socket insertion hole 72 provided in the lighting fixture 71 so that current and voltage are supplied to the LED 2 through the lighting fixture 71.

  In addition, the LED lamp 1 of a present Example is comprised so that it can also be attached to the existing fluorescent lamp type lighting fixture 71 (refer FIG.6 and FIG.7). In addition to the mounting terminal 30, as a power supply device for lighting the LED lamp 1, for example, a switching power supply (not shown) that converts AC power into constant DC power is provided at both ends in the longitudinal direction of the support base 3. A device or the like is arranged, and the DC power adjusted in power is supplied to the LED 2 as the light source by the switching power supply device.

  The illumination substrate 4 is provided with LEDs 2,... As light sources, and is disposed inside a hollow structure formed by the support base 3 and the translucent member 5. The illumination board 4 of this embodiment is a well-known wiring board formed in the shape of a long plate in plan view, and has mounting holes (not shown) that are electrically connected to the connection terminals of the LEDs 2. Is provided in an array. The illumination board 4 is disposed on the lower surface 3a of the long plate-like support base 3 described above, and is mounted so that the light emitting surface of the LED 2 faces substantially vertically below the support base 3 (see FIG. 2 and the like).

  The illumination substrate 4 is made of a material such as aluminum, and is preferably made of a metal having a high thermal conductivity (more preferably, a metal having a thermal conductivity of 200 W / (m · K) or more). That is, the illumination board 4 of this embodiment is formed of the same material as the support base 3. Since the illumination substrate 4 is formed of a material having good thermal conductivity, it is possible to prevent heat from being accumulated in the vicinity of the LEDs 2. In particular, as in the present embodiment, the support base 3 and the illumination substrate 4 are formed of the same material having good thermal conductivity, thereby supporting the heat generated by the LEDs 2. Heat can be efficiently radiated from the base 3 to the atmosphere.

  The illumination substrate 4 is brought into close contact with and in contact with the support base 3 in a state where the adhesion is enhanced by, for example, pressing. The support base 3 and the illumination board 4 are brought into contact with each other, thereby preventing the heat conduction from the illumination board 4 to the support base 3 due to the entry of air between the support base 3 and the illumination board 4. And efficient heat treatment can be performed. When press working is performed, for example, a double-sided tape without an adhesive or a base material is sandwiched between the support base 3 and the illumination board 4.

  The translucent member 5 is a hollow cylindrical member formed in a substantially circular cross section, and is attached to the support base 3 so as to cover the light emitting direction of the LEDs 2. That is, the LED lamp 1 according to the present embodiment is configured in a state where the lower space of the support base 3 is completely covered by the translucent member 5. The translucent member 5 is formed of a translucent material that transmits the irradiation light from the LEDs 2, 2..., Specifically, formed of transparent glass, acrylic resin, polycarbonate, or the like.

  The translucent member 5 of the present embodiment is configured by a member that transmits without changing the wavelength range of the irradiation light emitted from the LED 2, but, as will be described later, a predetermined inner wall surface of the translucent member 5. In the region, a filter member 50 is attached as a filter layer that transmits light in the blue wavelength range of the light emitted from the LEDs 2... (See FIG. 2 and the like).

Next, the structure of each light emission part 20 * 21 formed in the LED lamp 1 of a present Example is explained in full detail below.
As shown in FIGS. 1, 2, and 5, the LED lamp 1 of this embodiment includes a first light emitting unit 20 that emits white light at a substantially vertical lower position of the support base 3, and a substantially vertical position of the support base 3. A second light emitting unit 21 that emits blue light at a position outside the lower side is configured, and white or blue irradiation light is irradiated from the light emitting units 20 and 21 toward the radial direction of the LED lamp 1. The LED lamp 1 as a whole is configured to emit light in two colors of white and blue.

  Specifically, in the LED lamp 1 of the present embodiment, irradiation from the LEDs 2, 2... Is performed on the entire region in the longitudinal direction of the translucent member 5 and in a predetermined region in the circumferential direction of the inner wall surface. Of the light, a filter member 50 as a filter layer that transmits light in the blue wavelength range is affixed, and the LED 2 is provided in a predetermined region to which the filter member 50 is affixed (hereinafter, this region is referred to as a filter region 51). When the irradiation light from 2... Is transmitted, the second light emitting unit 21 emits blue light. On the other hand, the irradiation light from the LEDs 2, 2... Is transmitted to a region where the filter member 50 is not provided on the inner wall surface of the translucent member 5 (hereinafter, this region is referred to as a non-filter region 52). One light emitting unit 20 emits white light.

  The filter member 50 is formed of a film-like material having a function of transmitting only light in the blue wavelength range. Specifically, the filter member 50 is in the blue wavelength range of 380 to 550 nm, and preferably 400 to 480 nm. Those that transmit light in the inner wavelength range are used. By using such a filter member 50 that transmits light in the blue wavelength range, white irradiation light emitted from the LED 2 is converted into blue irradiation light in the filter region 51 to which the filter member 50 is attached. The

  In the present embodiment, the wavelength of the light emitted from the LED 2 must include a wavelength range component (blue wavelength range) that transmits the filter member 50. Accordingly, as the LED 2 used in this embodiment, one having a wavelength component of at least 400 to 700 nm in the emission wavelength is used. Specifically, as the LED 2, an LED 2 that emits light in an emission color corresponding to daylight color, daylight white, white, warm white, or light bulb color is used. Preferably, as such an LED 2, an LED of a type that obtains an emission color corresponding to daylight color, daylight white, white, warm white, or light bulb color by applying a phosphor on a blue light emission type chip is used. .

  The filter region 51 has an angle β formed with respect to the light emitting axis of the LED 2 extending over the entire area of the translucent member 5 in the longitudinal direction and along the normal direction of the illumination substrate 4 in the circumferential direction. It is provided on an extension line that is approximately 60 degrees. In particular, the irradiation range from the LED 2 is a region on the inner side (light emission axis side) of the angle β formed by about 60 degrees with respect to the light emission axis of the LED 2 described above in the circumferential direction of the translucent member 5. By providing the filter region 51 in the region, it is possible to reliably transmit the irradiation light from the LED 2 to the filter region 51.

  The filter region 51 may be provided at least on the extension line in the circumferential direction where the angle β formed with respect to the light emitting axis of the LED 2 described above is approximately 60 degrees. And provided over the outer region and the inner region with respect to the extension line. In the present embodiment, the filter regions 51 are provided on both sides of the LED lamp 1 in the short direction (see FIG. 2).

  On the other hand, the non-filter region 52 is provided over the entire region in the longitudinal direction of the translucent member 5 and in the region in the circumferential direction on the inner side (light emission axis side) than the filter region 51. In the non-filter region 52, the filter member 50 is not affixed. Therefore, unlike the filter region 51, the irradiation light from the LED 2 is transmitted as it is without changing the wavelength range. In this embodiment, as described above, the LED 2 has a wavelength component of 400 to 700 nm corresponding to daylight color, day white color, white color, warm white color, light bulb color, or the like in the emission wavelength. The light is transmitted through the non-filter region 52 as it is.

  As described above, in the LED lamp 1 of this embodiment, the irradiation light from the LED 2 passes through the non-filter region 52 as it is and is irradiated toward the substantially vertical lower position of the support base 3, so that the non-filter region 52 The region emits white light as the first light emitting unit 20. On the other hand, the irradiation light from the LED 2 transmits only the light in the blue wavelength range through the filter region 51 and is irradiated toward a position outside the substantially vertical lower side of the support base 3, thereby the region of the filter region 51. Is emitted in blue as the second light emitting unit 21.

  In addition, the 2nd light emission part 21 of a present Example is comprised by a pair of edge part which the 1st light emission part 20 opposes with respect to the transversal direction of the LED lamp 1, In other words, the longitudinal direction of the LED lamp 1 A first light emitting unit 20 is formed at the center of the first light emitting unit 20 and a second light emitting unit 21 is formed so as to surround both sides in the short direction.

Next, the configuration of the security light 7 to which the LED lamp 1 of the present embodiment is applied will be outlined below.
As shown in FIGS. 6 to 8, the security light 7 of the present embodiment is configured as a security light that is an outdoor lighting device. Specifically, the security light 7 is attached to a support pole 8 such as a utility pole. It is comprised with the attachment member 70 and the lighting fixture 71 etc. to which the LED lamp 1 is attached. In the security light 7, the area in the diameter expansion direction is an irradiable area from the substantially vertical lower area of the lighting fixture 71 toward the protruding direction from the axial center of the column 8. The predetermined distance D from the ground surface to the lighting fixture 71 is appropriately set according to the installation location of the security light 7, the illuminance and luminance of the light source, and in this embodiment, the lighting fixture 71 is about 3 m from the ground surface. Located ~ 5m vertically above.

  As described above, the LED lamp 1 according to the present embodiment is attached by inserting a pair of mounting terminals into the socket insertion hole 72 of the lighting fixture 71 (see FIG. 7).

  FIG. 8 is a horizontal plane illuminance distribution diagram of the irradiation light emitted from the luminaire 71 to which the LED lamp 1 is attached, and the illuminance distribution when the luminaire 71 is positioned approximately 4.5 m above the ground surface G. FIG. In the security light 7 in which the luminaire 71 is positioned approximately 4.5 m above the ground surface G, the horizontal plane illuminance distribution has an illuminance of 7 lx in the substantially vertical downward direction, and 5 lx, 3 lx as it moves outward in the radial direction. It is attenuated to 1 lx. In particular, in the present embodiment, the attenuation in the lateral direction outward direction of the LED lamp 1 in the illuminance distribution is more significant than the attenuation in the outward direction in the longitudinal direction of the LED lamp 1. This is because the illuminance in the lateral direction outward direction is reduced by irradiating the blue light from the second light emitting unit 21 of the LED lamp 1 toward the lateral direction outside.

  And in the crime prevention light 7 of a present Example, from the 1st light emission part 20 of the LED lamp 1, it is white type | system | group toward the area | region of the lighting fixture 71 in the substantially perpendicular | vertical downward direction (henceforth this area | region is called substantially vertical downward area | region). And the second light emitting unit 21 is directed to an area outside the substantially vertical lower side of the lighting fixture 71, that is, an area outside the substantially vertical lower area (hereinafter, this area is referred to as a lower outer area). Then, blue light is irradiated (see FIG. 6).

  That is, in the present embodiment, in the vicinity of the luminaire 71, in the substantially vertical lower region, the white light distribution is generated by the white light emitted from the first light emitting unit 20 of the LED lamp 1, and the lower outer region. Then, the blue light distribution is obtained by the blue light emitted from the second light emitting portion 21 of the LED lamp 1. In such a state, when the crime prevention light 7 is viewed from a distance, the lighting fixture 71 and its lower vicinity are visually recognized as emitting blue light.

  On the other hand, in the vicinity of the ground surface G, the substantially vertical lower region T1 is wider in the outer peripheral direction than the vicinity of the lighting fixture 71, and mainly has a single white light distribution. In such a state, for example, when a pedestrian or a traveling vehicle gradually approaches the security light 7 and passes through a substantially vertical lower portion (substantially lower vertical region) of the lighting fixture 71, the ground surface G that is substantially vertically lower is provided. In addition, the surrounding light is emitted in white by the white illumination light, and the ground surface G of the pedestrian road is illuminated mainly for pedestrians and traveling vehicles.

  As described above, the LED lamp 1 according to this embodiment is provided with a plurality of LEDs 2... As a light source and can emit light with at least two colors. The support base 3 provided with the mounting terminal 30 to be inserted into the socket insertion hole 72 of the luminaire 71 and a plurality of LEDs 2... Are attached and disposed between both longitudinal ends of the support base 3. , And a translucent member 5 attached to the support base 3 so as to cover the light emission direction of the LEDs 2, 2... Illuminate a substantially vertical lower position of the support base 3 in white. The first light emitting unit 20 to be emitted and the second light emitting unit 21 to emit blue light at a position outside the substantially vertical lower side of the support base 3 are formed.

  Therefore, since the LED lamp 1 of the present embodiment uses the LED 2 as a light source, it is possible to suppress power consumption and to achieve a reduction in environmental load such as prevention of global warming by reducing the amount of heat generated from the light source. Specifically, measures to prevent global warming by reducing the amount of heat generated from the light source (for example, solving the heat island problem), energy-saving business measures by reducing power consumption, and carbon dioxide reduction business measures as a ripple effect Can contribute.

  In particular, the LED lamp 1 of the present embodiment can reduce the power consumption to 10% to 15% and can greatly reduce the maintenance cost due to the longer life compared to a conventional fluorescent lamp or the like. Therefore, when the LED lamp 1 of the present embodiment is installed in place of a conventional fluorescent lamp or the like, the recombination cost can be covered by reducing the power consumption cost after several years. In particular, since the LED lamp 1 of the present embodiment does not use mercury, the environmental load is small compared to a fluorescent lamp containing mercury.

Moreover, since the LED lamp 1 of the present embodiment is formed with the second light-emitting portion 21 that emits blue light outside the substantially vertical lower side of the support base 3, when the LED lamp 1 is attached to a lighting fixture, The lighting fixture and the vicinity thereof emit light in blue. For this reason, it is possible to visually recognize the lighting fixture and its vicinity as if it is emitting “blue” with blue illumination light from a distance, and an anti-crime effect can be expected as a “blue” crime prevention light.
On the other hand, the LED lamp 1 of the present embodiment is formed with the first light emitting unit 20 that emits white light at a substantially vertical lower position of the support base 3, so that when the LED lamp 1 is similarly attached to a lighting fixture, Since the position near the surface G is illuminated with a white system, the illuminance below the lighting fixture does not drop, and smooth passage of pedestrians and traveling vehicles is not hindered. In particular, since an object positioned substantially vertically below can be illuminated with a white natural color, a clear image can be recorded by a communication camera capable of recording and recording for monitoring and conversation.
In this way, by arranging the “blue” lighting fixtures that employ the LED lamp 1 of this embodiment in a plurality of locations in the area, the crime prevention effect is exhibited, and the environment for creating a safe and secure city It can contribute to the design.

  Further, in the LED lamp 1 of the present embodiment, the second light emitting unit 21 is provided with a white LED as a light source, and in a predetermined region of the translucent member 5, the light emitted from the LED 2 has a blue wavelength range. Since the filter member 50 that transmits only light is attached, a predetermined region can be easily emitted in blue simply by attaching the filter member 50 to an arbitrary location.

  In particular, the second light emitting unit 21 of the present embodiment is configured at a pair of edges facing the first light emitting unit 20 with respect to the short direction of the LED lamp 1, in other words, the longitudinal direction of the LED lamp 1. A first light emitting unit 20 is formed at the center of the first light emitting unit 20 and a second light emitting unit 21 is formed so as to surround both sides in the short direction. By being configured in this way, the two-color irradiation light can be efficiently separated by the LED 2 having high directivity (straightness), and in particular, the blue-based irradiation light from the second light emitting unit 21 in all directions. Since it can be irradiated, the visibility of “blue” in the second light emitting unit 21 can be improved.

As a structure of the outdoor illuminating device of a present Example, it is not limited to the structure of the LED lamp 1 mentioned above.
In another embodiment illustrated and described below, detailed description of portions that are substantially the same as those of the above-described embodiment will be omitted, and only portions that are structurally different will be mainly described in detail.

  That is, in the above-described embodiment (see FIGS. 2 and 4), the second light emitting unit 21 is provided with a white LED as a light source, and in a predetermined region of the translucent member 5, Although a filter layer (filter member 50) that transmits only light in the blue wavelength range is provided, the type and arrangement of the LEDs used as the second light emitting unit 21 and the second light emitting unit 21 with respect to the first light emitting unit 20 are provided. The arrangement configuration is not limited to this.

  For example, as in the second embodiment shown in FIG. 9, the white LED 102 a may be provided in the first light emitting unit 120 and the blue LED 102 b may be provided in the second light emitting unit 121. In this embodiment, the second light emitting unit 121 is configured so as to sandwich both sides in the longitudinal direction of the LED lamp 1 with respect to the first light emitting unit 120, and the translucent member 105 includes the light emitted from the LED 2. A filter layer that transmits only light in the blue wavelength range is not provided. That is, in the LED lamp 101 of this embodiment, the first light emitting unit 120 emits white light at a substantially vertical lower position of the support base 103 by the white LED 102a, and the second light emitting unit 121 emits the support base 103 by the blue LED 102b. Therefore, the LED lamp 1 emits blue light at a position on the outer side in the longitudinal direction of the LED lamp 1 from below substantially vertically.

  In the above-described embodiment (see FIGS. 2 and 5, etc.), a filter is formed by attaching a film-like filter member 50 to the wall surface of the translucent member 5 as a filter layer that transmits light in a predetermined wavelength range. Although the region 51 is configured, the configuration of the filter region 51 is not limited to this. For example, in the translucent member 5, a paint that transmits light in a predetermined wavelength range is mixed into the material in the predetermined region. Thus, the filter layer may be formed integrally with the translucent member 5.

  Specifically, as in the third embodiment shown in FIG. 10, in the translucent member 205, a filter layer 250 that transmits only light in the blue wavelength range of the irradiation light from the LED 202 is integrated in a predetermined region. Is formed. That is, in the LED lamp 201 of this embodiment, in the translucent member 205, the light emitting axis of the LED 202 is extended along the normal direction of the illumination substrate 204 in the circumferential direction over the entire area in the longitudinal direction. The filter layer 250 is formed integrally with the translucent member 205 on an extension line where the angle β formed with respect to is approximately 60 degrees, and other regions are transmitted without changing the wavelength range of the irradiation light emitted from the LED 2. It is configured as a layer to be made.

  In the above-described embodiment (see FIGS. 2 and 4), the LEDs 2 are attached to the illumination board 4 in two rows along the longitudinal direction of the support base 3, but the arrangement of the LEDs 2 is not limited to this. . For example, as in the fourth embodiment shown in FIGS. 11 and 12, the LEDs 2 may be attached to the illumination board 4 in a line along the longitudinal direction of the support base 3.

  In the above-described embodiment (see FIG. 2 and the like), the support base 3 is constituted by a single member having a long plate shape in plan view, but the support base 3 may be constituted by a plurality of members. That is, the LED lamp 1 using the LED 2 as the light source has a problem of how to efficiently dissipate the heat generated from the LED 2, and the support base 3 is composed of a plurality of members, so that a more effective heat dissipation structure. May be provided.

  Moreover, in the Example (refer FIG. 4 etc.) mentioned above, although the illumination board 4 is comprised from a planar view long plate-like single member, as the illumination board 4, you may be comprised by several members. By configuring the illumination board 4 with a plurality of members, for example, when the linear expansion coefficients of the support base 3 and the illumination board 4 are different, the support base 3 and the illumination board 4 when the overall temperature of the LED lamp 1 rises. It is possible to prevent the adhesion of the resin from deteriorating.

  Moreover, in the Example mentioned above (refer FIG.1 and FIG.2 etc.), the shape of the LED lamp 1 is comprised so that it may become a cross-sectional substantially circular shape as a whole by using the translucent member 5 with a cross-sectional substantially circular shape. However, the shape of the LED lamp 1 is not limited to this. For example, as the shape of the LED lamp 1, the support base 3 and the translucent member 5 are each formed in a substantially half-pipe shape, and the support base 3 and the translucent member 5 are integrally combined to have a substantially circular cross section. It may be formed. Further, the support base 3 of the LED lamp 1 is formed in a substantially U-shaped housing shape, and the translucent member 5 is integrally combined so as to cover the opening of the support base 3 so that the cross section is substantially rectangular. It may be formed into a shape.

The perspective view which showed the whole structure of the LED lamp which concerns on the 1st Example of this invention. The cross-sectional view of an LED lamp. The longitudinal cross-sectional view of an LED lamp. The top and bottom sectional view of a LED lamp. The cross-sectional view which showed the structure of the 1st light emission part and the 2nd light emission part. The side view of the crime prevention light to which the LED lamp of a present Example is applied. The side view of a lighting fixture. The horizontal surface illumination intensity distribution map of the irradiation light irradiated from a lighting fixture. The upper and lower sectional drawing of the LED lamp of a 2nd Example. The cross-sectional view of the LED lamp of the third embodiment. The cross-sectional view of the LED lamp of the fourth embodiment. Similarly, the vertical sectional view of the LED lamp of the fourth embodiment.

Explanation of symbols

1 LED lamp 2 LED
DESCRIPTION OF SYMBOLS 3 Support base body 4 Illumination board 5 Translucent member 20 1st light emission part 21 2nd light emission part 30 Terminal for mounting 71 Lighting fixture 72 Socket insertion hole

Claims (5)

A plurality of LEDs are provided as a light source, and the LED lamp can emit light with at least two colors.
A support base provided with terminals for mounting on a lighting fixture at both longitudinal ends; and
A plurality of LEDs are mounted, and an illumination board disposed between both longitudinal ends of the support base;
A translucent member attached to the support base so as to cover the light emitting direction of the LED,
A first light-emitting portion that emits white light at a substantially vertical lower position of the support base;
An LED lamp, comprising: a second light emitting portion that emits blue light at a position outside a substantially vertical lower side of the support base.   2. The LED lamp according to claim 1, wherein the second light emitting unit is provided on a pair of edges facing the first light emitting unit.   The second light emitting unit is provided with a white LED as a light source, and a filter layer that transmits only light in the blue wavelength range of the irradiation light from the LED is provided in a predetermined region of the translucent member. The LED lamp according to claim 1 or 2, characterized in that   The LED lamp according to claim 1, wherein the second light emitting unit is provided with a blue LED as a light source.   The LED lamp according to any one of claims 1 to 4, wherein the second light emitting unit is provided with a white LED as a light source.

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