JP2016146260A - Illumination lamp and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination lamp and a luminaire, capable of surely suppressing emission loss.SOLUTION: An illumination lamp includes a long light source unit having a light-emitting element, and a cylindrical cover formed so as to extend in the longitudinal direction of the light source unit and housing the light source unit. The cover has a first region positioned on a front face side to be a light irradiation side of the light-emitting element of the light source unit, and a second region connected to the first region and positioned from the connection position with first position to a back face side of the light source unit. On the outer surface of the second region, formed is a reflection film configured to reflect light emitted from the light-emitting element.SELECTED DRAWING: Figure 1B

Description

  The present invention relates to an illumination lamp and an illumination device.

  2. Description of the Related Art Some conventional illumination lamps include a light source unit having a light emitting element and a cylindrical translucent member having a light source unit disposed inside. The light emitting element emits pseudo white light by, for example, a light emitting diode (LED) and a fluorescent material that converts the wavelength of light.

  Such an illumination lamp has a small size, high efficiency, and a long life compared with an illumination lamp using a fluorescent lamp, an incandescent lamp, or the like. In recent years, such illumination lamps are becoming more and more popular with the improvement of luminous efficiency of luminous elements and the improvement of luminous flux.

  In an illumination lamp using a fluorescent lamp, an incandescent lamp, or the like, glass is used as the cylindrical translucent member. However, in the above-described conventional illumination lamp, resin products such as polycarbonate resin and acrylic resin are used as the cylindrical translucent member due to less heat generation of the light emitting diode and different light emission principles. In addition, since the light emitting diode is a point light source, a bright spot generated at the time of lighting causes glare, discomfort, and the like.

  Many of the illumination lamps including the fluorescent lamp are attached to the upper part (for example, the ceiling) of the room. The illumination lamp plays a role of brightening the space below the illumination lamp mounting position. For example, in an illumination lamp employing a fluorescent lamp, the entire surface in the circumferential direction emits light in a cylindrical tube on which a fluorescent paint film is formed. Moreover, in the illumination lamp which employ | adopted the light emitting diode, light is irradiated from the area | region except the area | region where the heat sink is arrange | positioned among cylindrical covers.

  For example, when an illumination lamp using a light emitting diode is attached to the ceiling, light also passes from a region of the illumination lamp cover that faces the ceiling. The light that has passed through this area travels toward the ceiling. That is, this light does not travel directly to the space below the mounting position of the illumination lamp, but travels, for example, to the ceiling surface. Therefore, the space below the mounting position of the illumination lamp cannot be efficiently brightened (outgoing loss).

  Therefore, in order to suppress the emission loss, an illuminating device to which an illuminating lamp is attached has been proposed that includes an instrument body on which a reflection surface that reflects light traveling toward the ceiling is formed (for example, Patent Document 1). reference).

JP 2012-256603 A

  In the illuminating device provided with the fixture main body which does not have a reflective surface, when the above-mentioned illumination lamp is attached, there exists a subject that an output loss cannot be suppressed. Moreover, even in an illuminating device including an appliance main body having a reflective surface, there is a problem in that the emission loss cannot be more efficiently suppressed when an illumination lamp is attached.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illumination lamp and an illumination device that can more reliably suppress an emission loss.

  An illumination lamp according to the present invention includes a long light source unit including a light emitting element, and a cylindrical cover that is formed to extend in the longitudinal direction of the light source unit and accommodates the light source unit. A first region located on the front side which is the light irradiation side of the light emitting element of the unit, and a second region connected to the first region and located from the connection position with the first region to the back side of the light source unit, A reflective film that reflects light emitted from the light emitting element is formed on the outer surface of the second region.

  Since the illumination lamp according to the present invention has the above-described configuration, the emission loss can be more reliably suppressed.

It is explanatory drawing of the illuminating device 600 provided with the illumination lamp 1 which concerns on Embodiment 1 of this invention. It is a perspective view of the illumination lamp 1 which concerns on Embodiment 1 of this invention. It is AA sectional drawing of the illumination lamp 1 shown to FIG. 1B. It is the modification 1 of the cover 20 of the illumination lamp 1 which concerns on Embodiment 1 of this invention. It is the modification 2 of the cover 20 of the illumination lamp 1 which concerns on Embodiment 1 of this invention. It is the modification 3 of the cover 20 of the illumination lamp 1 which concerns on Embodiment 1 of this invention. It is sectional drawing of the illumination lamp 1B which concerns on Embodiment 2 of this invention. It is sectional drawing of the illumination lamp 1C which concerns on Embodiment 3 of this invention. It is sectional drawing of the illumination lamp 1D which concerns on Embodiment 4 of this invention. It is sectional drawing of the illumination lamp 1E which concerns on Embodiment 5 of this invention.

  Hereinafter, embodiments of an illumination lamp 1 according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
FIG. 1A is an explanatory diagram of an illumination device 600 including the illumination lamp 1 according to the first embodiment. The lighting device 600 will be described based on FIG. 1A.
The illumination lamp 1 according to Embodiment 1 is provided with an improvement that can more reliably suppress the emission loss.

[Description of Configuration of Lighting Device 600]
The illumination device 600 is attached to, for example, a ceiling via a fixture (not shown), and the illumination lamp 1 is turned on to irradiate light on the floor, indoor space, and the like. As shown in FIG. 1, the lighting device 600 includes a lighting fixture 500 that supplies power to the lighting lamp 1 to light the lighting lamp 1 and a detachable lighting lamp 1.

  The lighting fixture 500 includes a fixture main body 140 and a reflection plate 120 disposed on the upper side of the lighting lamp 1. The lighting fixture 500 includes a power supply socket 100 to which the power supply base 6 is attached and electrically connected to the power supply base 6, and a ground socket 110 to which the ground base 5 is attached and is electrically connected to the ground base 5. It is equipped with. The power supply base 6 and the ground base 5 are also collectively referred to as a base 30. Here, the power supply socket 100 and the earth socket 110 also have a role of mechanically supporting the illumination lamp 1. The lighting device 130 is housed in the appliance main body 140. The lighting device 130 stores a power supply device (not shown) that supplies power to the illumination lamp 1 via the power supply socket 100 when a switch (not shown) is turned on, and stops power supply when the switch is turned off. Is done.

  The illumination lamp 1 is housed in a cover 20 that is, for example, a cylindrical outer shell, a power supply base 6 attached to one end of the cover 20, a ground base 5 attached to the other end of the cover 20, and the cover 20. And a light source unit 10 (see FIG. 1B) provided with a plurality of light emitting elements 11.

Note that the illumination device 600 may have a configuration other than that shown in FIG. 1A. For example, the illuminating device 600 may be one in which a plurality of illumination lamps 1 can be detachably attached, or may be embedded in a ceiling.
Moreover, the illuminating device 600 may be attached other than a ceiling. For example, the lighting device 600 may be installed on a table to illuminate the table, may be attached to a wall via a fixture, or used in other places or applications. There may be.
Further, the lighting device 600 may be in a mode in which the reflecting plate 120 is not provided. As will be described later, in the illumination lamp 1 according to the first embodiment, a reflection film 20b that reflects light emitted from the light emitting element 11 is formed on the outer surface of the second region 20B of the cover 20, This is because even if the reflector 120 is not provided, emission loss can be suppressed.

[Description of configuration of illumination lamp 1]
FIG. 1B is a perspective view of the illumination lamp 1 according to the first embodiment. FIG. 2 is a cross-sectional view taken along line AA of the illumination lamp 1 shown in FIG. 1B. For convenience of explanation, FIG. 1B shows a state in which a part of the cover 20 is opened in order to show the state of the light source unit 10 accommodated in the cover 20. Moreover, in FIG. 1B, illustration of the heat radiating member 13 is abbreviate | omitted.

  The illumination lamp 1 includes a light emitting element 11, a long light source unit 10 that emits light, a cylindrical cover 20 that is formed to extend in the longitudinal direction of the light source unit 10, and accommodates the light source unit 10, And a base 30 disposed at both ends of the cover 20.

  The light source unit 10 includes a plurality of light emitting elements 11, a substrate 12 on which the plurality of light emitting elements 11 are mounted, and a heat radiating member 13 corresponding to a heat sink.

  A plurality of light emitting elements 11 are mounted on the substrate 12. The light emitting element 11 emits pseudo white light by a light emitting diode and a fluorescent material that converts the wavelength of light. For example, the light emitting element 11 preferably performs Lambertian light distribution that is substantially constant regardless of the direction in which the luminance of the light emitting surface is viewed. Note that the structure of a bonding material (not shown) for bonding the light emitting element 11 to the substrate 12 is not particularly limited as long as the light emitting element 11 and the substrate 12 can be bonded. In addition, the configuration of a circuit pattern (not shown) that is electrically connected to the light emitting element 11 formed on the substrate 12 is not particularly limited as long as the light emitting element 11 and the circuit pattern can be connected.

The substrate 12 can be made of, for example, a glass epoxy resin. In addition, the material which comprises the board | substrate 12 is not limited to this glass epoxy resin. Moreover, it is preferable that parts other than the part electrically connected with the light emitting element 11 among the board | substrates 12 are covered with reflective resin. Thereby, the light which does not advance directly to the front side of the cover 20 among the light irradiated from the light emitting element 11 can be directed to the front side of the cover 20.
Moreover, the board | substrate 12 is joined on the heat radiating member 13 with high heat conductivity compared with the board | substrate 12 etc., for example.
The heat radiating member 13 is provided so as to contact the inner surface of the cylindrical cover 20. The heat radiating member 13 is attached to the inner surface of the cover 20. For example, the heat dissipation member 13 is fixed to the cover 20 by being bonded to the inner surface of the cover 20 with an adhesive.

  The cover 20 accommodates the light source unit 10. The cover 20 can be made of glass or the like, for example. The cover 20 can be made of resin or the like other than glass. Moreover, it is preferable that the thickness of the cover 20 is about 0.5-2 mm, for example.

  Here, the cover 20 is connected to the first region 20A located on the front side that is the light irradiation side of the light emitting element 11 of the light source unit 10 and the first region 20A, and the light source unit is connected to the first region 20A from the connection position. 10 and the 2nd field 20B located over the back side. In the first embodiment, the cover 20 is configured from the first region 20A and the second region 20B. A reflection film 20b that reflects light emitted from the light emitting element 11 is formed on the outer surface of the second region 20B. In the first embodiment, since the cover 20 is cylindrical, the outer surface of the cover 20 is a peripheral surface (outer peripheral surface), and the inner surface of the cover 20 is also a peripheral surface (inner peripheral surface). .

  Here, a space in which the light source unit 10 accommodated inside the cover 20 is disposed is defined as an inner space of the cover 20, and a space in which light passing through the cover 20 travels is defined as an outer space of the cover 20. . In this case, the outer surface of the cover 20 corresponds to the interface between the outer space of the cover 20 and the cover 20, and the inner surface of the cover 20 corresponds to the interface between the inner space of the cover 20 and the cover 20. To do.

A portion where the first region 20A and the second region 20B are formed will be described using a central angle when the cover 20 is viewed in cross section. As shown in FIG. 2, the center of the cover 20 is O. Here, the center O is a point where a vertical axis passing through the center of the light source unit 10 and a horizontal axis that bisects the cover 20 into the irradiation surface side and the back surface side intersect.
An angle between a straight line BO passing through the end B of the second region 20B and the center O and a horizontal axis passing through the center O is defined as θ. In the first embodiment, the angle θ is set to a value larger than 0 ° as shown in FIG. That is, when the cover 20 is viewed in a cross section perpendicular to the longitudinal direction of the cover 20, the central angle of the arc-shaped second region 20B is larger than the central angle of the arc-shaped first region 20A. In the first embodiment, the first region 20A and the second region 20B are described as being symmetrical with respect to the vertical axis. However, the present invention is not limited to this. For example, the first region 20A may be formed such that the right portion is larger than the left portion with the vertical axis as a boundary. The same applies to the second region 20B.

  The cover 20 and the heat dissipating member 13 are bonded with an adhesive. As the adhesive, a silicone-based adhesive may be employed, but other materials such as an acrylic may be employed.

A reflective film 20b is formed on the back side of the cover 20, that is, on the side where the light source unit 10 is disposed. That is, the reflective film 20b is formed on the outer surface of the second region 20B of the cover 20. The thickness of the reflective film 20b is not particularly limited, but may be, for example, about 0.1 to 20 μm. The film thickness of the reflective film 20b can be appropriately changed depending on the method of forming the reflective film 20b.
The reflective film 20b is not particularly limited as long as it is a highly reflective film. For example, a metal thin film such as aluminum or silver vapor deposition can be employed. In addition, a resin film in which a highly reflective material such as aluminum powder or titanium dioxide is dispersed in a highly transparent resin such as an acrylic resin can be used for the reflective film 20b. The reflective film 20b may be a mode in which a previously molded film is attached to the cover 20.

A diffusion film 20 a is formed on the front (light irradiation) side of the cover 20. That is, the diffusion film 20 a is formed on the outer surface of the first region 20 </ b> A of the cover 20. Although the film thickness of the diffusion film 20a is not specifically limited, For example, it is good to set it as about 5-40 micrometers. The diffusion film 20a is obtained by dispersing a diffusing material having a high reflectance in the visible light band using a resin having high transparency such as acrylic or urethane resin as a binder. The binder only needs to have high transparency, and other binders may be used. Examples of the light diffusing material include inorganic materials such as barium sulfate, calcium carbonate, and silica particles, organic materials such as acrylic powder, and silicone powder. The light diffusing material may be other as long as the reflectance in the visible light band is high. The particle size of the diffusing material is made smaller than the film thickness described above.
Further, the diffusion film 20a has fluidity at the time of application, is cured by heating, and the state before curing is preferably liquid or powdery. Further, the diffusion film 20a may be an embodiment in which a sheet previously formed on a film is attached to the cover 20.

[Effects of the illumination lamp 1 according to the first embodiment]
Since the illumination lamp 1 according to the first embodiment includes the cover 20 on which the reflection film 20b that reflects the light emitted from the light emitting element 11 is formed, the emission loss can be more reliably suppressed. .
For example, even if the reflector 120 is not provided in the illumination device 600 to which the illumination lamp 1 is attached, the emission loss can be suppressed. In addition, the lighting device 600 can be simplified because it is not necessary to provide the lighting device 600 with a highly reflective device for improving the efficiency of the device.

  In the illumination lamp 1 according to the first embodiment, since the diffusion film 20a is formed not on the inner surface of the cover 20 but on the outer surface, the internal stress of the film works in the direction of improving the adhesion, and the diffusion film 20a is more It is difficult to peel off.

  In the illumination lamp 1 according to the first embodiment, a part of the light emitted from the light source unit 10 is scattered by the diffusion film 20 a and emitted to the outer surface of the cover 20. Further, some of the scattered light is reflected toward the inner surface of the cover 20, but is reflected by the reflective film 20 b together with the light that was not first irradiated to the diffusion film 20 a, and is efficiently irradiated to the diffusion film 20 a. become. As described above, in the illumination lamp 1 according to the first embodiment, it is possible to transmit light from the cover 20 while diffusing the light at the portion where the first region 20A of the cover 20 is formed. Therefore, the illumination lamp 1 according to the first embodiment has a high light extraction efficiency and is difficult to see the bright spot of the light emitting element 11.

[Modification 1]
FIG. 3 shows a first modification of the cover 20 of the illumination lamp 1 according to the first embodiment. As shown in FIG. 3, the numerical value of the angle θ may be negative. That is, in the first embodiment, the case where the position of the end portion B is located closer to the front surface of the light source unit 10 and the numerical value of the angle θ is positive has been described as an example, but the present invention is not limited thereto. For example, the position of the end B may be located closer to the back surface of the light source unit 10 and the numerical value of the angle θ may be negative. Here, in FIG. 3, when the angle θ is positive, the straight line OB is located on the upper side of the horizontal axis, and when the angle θ is negative, the straight line OB is located on the lower side of the horizontal axis. When you are. Even if it is the aspect which concerns on the modification 1, the effect similar to the illumination lamp 1 which concerns on this Embodiment 1 can be acquired.

[Modification 2]
FIG. 4 is a second modification of the cover 20 of the illumination lamp 1 according to the first embodiment. As shown in FIG. 4, the cover 20 has a second region 20 </ b> B formed in front of the light source unit 10. The new second region 20B is a portion of the cover 20 between the two end portions BB. Thus, in the modification 2, the cover 20 includes the two second regions 20B. For this reason, the cover 20 is formed with a reflective film 20b in each of the second regions 20B. Even if it is the aspect which concerns on the modification 2, the effect similar to the illumination lamp 1 which concerns on this Embodiment 1 can be acquired.

[Modification 3]
FIG. 5 shows a third modification of the cover 20 of the illumination lamp 1 according to the first embodiment. In the first embodiment, as shown in FIG. 5, in the third modification, a part of the diffusion film 20a and a part of the reflection film 20b are formed so as to overlap each other. Specifically, the end portion of the diffusion film 20a is formed so as to overlap the end portion of the reflection film 20b. That is, the cover 20 includes a third region 20C formed so that the diffusion film 20a and the reflection film 20b overlap. Even if it is the aspect which concerns on the modification 3, the effect similar to the illumination lamp 1 which concerns on this Embodiment 1 can be acquired.

Embodiment 2. FIG.
An illumination lamp 1B according to the second embodiment will be described with reference to FIG. In the following description, the description overlapping or similar to the first embodiment is appropriately simplified or omitted. FIG. 6 is a cross-sectional view of the illumination lamp 1B according to the second embodiment.
The illumination lamp 1B includes a transparent film 20c formed on the outer wall surface of the cover 20 so as to cover the diffusion film 20a and the reflection film 20b. That is, the cover 20 is formed with a transparent film 20c on the diffusion film 20a and the reflection film 20b so as to cover the diffusion film 20a formed in the first area 20A and the reflection film 20b formed in the second area 20B. ing. The transparent film 20c is preferably a film having high transparency, weather resistance, and hardness, and examples thereof include acrylic resin, urethane resin, and silicone resin.

  The transparent film 20c is preferably a curable resin such as thermosetting or ultraviolet curing. Furthermore, the transparent film 20c has a fluidity before curing, and is formed by a method such as spraying or dipping. The thickness of the transparent film 20c is not particularly limited, but a thickness of about 5 to 15 μm is preferable. The transparent film 20c thus obtained protects the lower diffusion film 20a and the reflective film 20b from physical stress such as ultraviolet rays, mechanical stress such as scratching, and chemical stress such as chemical splashing and prevents peeling. Is possible. With the above configuration, it is possible to obtain an illumination lamp 1B that has high light extraction efficiency, is difficult to see bright spots, and is resistant to various external stresses.

Embodiment 3 FIG.
An illumination lamp 1C according to the third embodiment will be described with reference to FIG. In the following description, descriptions that overlap or are similar to those of Embodiments 1 and 2 are simplified or omitted as appropriate. FIG. 7 is a cross-sectional view of the illumination lamp 1C according to the third embodiment.
In the illumination lamp 1C, the diffusion film 20a, the reflection film 20b, the transparent film 20c formed to cover the diffusion film 20a and the reflection film 20b, and the transparent film 20c formed on the outer wall surface of the cover 20 are covered. The first low refractive index film 20d is formed in the region of the diffusion film 20a. For example, the first low refractive index film 20 d may be smaller than the refractive index of the material constituting the cover 20. That is, on the outer surface of the first region 20A, the first low refractive index film 20d having a refractive index smaller than the refractive index of the material constituting the cover 20 is formed on the transparent film 20c.

  The first low refractive index film 20d is characterized by high transparency and low refractive index. Examples of the material include fluororesins, silicone resins, and various resin films in which nano silica having a hollow structure is dispersed.

  The refractive index is preferably in the range of about 1.25 to 1.4. Further, the film thickness of the first low refractive index film 20d is preferably about 80 to 120 nm so as to obtain an antireflection effect utilizing the interference action of light. The formation method is not particularly limited, and examples thereof include spraying, dipping, and printing methods. The first low-refractive-index film 20d thus obtained reduces the reflection of light at the interface with the air, can improve the light extraction efficiency, and can provide an illumination lamp 1C with a high light extraction efficiency. it can.

  In the above description, the first low refractive index film 20d is formed only in the region of the diffusion film 20a formed on the outer wall surface of the cover 20 from the viewpoint of material utilization efficiency. However, it may be formed so as to cover the entire outer wall surface. That is, on the outer surfaces of the first region 20A and the second region 20B, the first low refractive index film 20d having a refractive index smaller than the refractive index of the material constituting the cover 20 is formed on the transparent film 20c. An aspect may be sufficient.

  Further, the first low refractive index film 20d is formed only on the outer wall surface side of the cover 20, but the first low refractive index film 20d may be formed on the inner wall surface side. That is, a mode in which a second low refractive index film (not shown) having a refractive index smaller than the refractive index of the material constituting the cover 20 may be formed on the inner surface of the first region 20A. In this case, the reflected light on the inner wall surface side can be reduced, and the light extraction efficiency can be further improved.

  Moreover, although the first low refractive index film 20d is formed on the transparent film 20c, the first low refractive index film 20d may be formed directly on the diffusion film 20a without the transparent film 20c. That is, even if the first low refractive index film 20d having a refractive index smaller than the refractive index of the material constituting the cover 20 is formed on the outer surface of the first region 20A on the diffusion film 20a. Good.

Embodiment 4 FIG.
An illumination lamp 1D according to the fourth embodiment will be described with reference to FIG. In the following description, overlapping or similar description to the first to third embodiments is appropriately simplified or omitted. FIG. 8 is a cross-sectional view of the illumination lamp 1D according to the fourth embodiment.

The light source unit 10 includes a substrate 12 on which the light emitting element 11 is mounted and disposed on the inner surface of the second region 20B. That is, in the illumination lamp 1 </ b> D, the light source unit 10 disposed inside the cover 20 includes the light emitting element 11 and the substrate 12. The substrate 12 is bonded to the back surface of the substrate 12 on the side where the light emitting element 11 is not mounted and the inner surface of the cover 20.
The substrate 12 is preferably a variety of flexible substrates, and can be matched to the shape of the cover 20. It also includes that the substrate 12 is a transparent substrate. With such a configuration, an illumination lamp 1D with higher light extraction efficiency can be obtained. In addition, since the distance to the diffusion film 20a can be increased, it is possible to obtain an illumination lamp 1D in which a bright spot is difficult to see.

Embodiment 5 FIG.
An illumination lamp 1E according to the fifth embodiment will be described with reference to FIG. In the following description, overlapping or similar description to the first to fourth embodiments is appropriately simplified or omitted. FIG. 9 is a cross-sectional view of the illumination lamp 1E according to the fifth embodiment.

  In the fifth embodiment, the first region 20A is made of a resin in which a light diffusing material is dispersed, and the second region 20B is made of a resin in which a light reflecting material is dispersed. That is, the cover 20 is not formed with the diffusion film 20a and the reflection film 20b, and adopts a preset resin as the resin constituting the cover 20, and has the same function as the function of the diffusion film 20a and the reflection film 20b. Is given. Specifically, it is as follows.

  In the illumination lamp 1E, the cover 20 includes a diffusion portion 20e and a reflection portion 20f. The diffusion portion 20e is made of a resin in which a light diffusing material is dispersed. Examples of the light diffusing material include inorganic materials such as calcium carbonate, barium sulfate, and silica fine particles, organic materials such as acrylic and styrene, and silicone powder. Examples of the resin include highly transparent acrylic and polycarbonate. The resin is not particularly limited as long as it has high transparency.

  In addition, the light diffusing material is uniformly dispersed so that the concentration distribution does not occur. The material of the reflecting portion 20f is not particularly limited as long as the reflectance is high, but a resin in which a light reflecting material is dispersed is preferable, and a metal such as aluminum may be used.

  As the light reflecting material, a material having high whiteness, concealment and refractive index such as titanium dioxide and lysopone is preferable, and barium sulfate, calcium carbonate and the like may be used. Examples of the resin include those similar to the diffusion portion 20e. The diffusion portion 20e diffuses while transmitting light, so it is important not to make the concentration of the diffusing material too high. However, it is important that the reflection portion 20f reflects light without transmitting and absorbing light. It is preferable to improve the concentration of the diffusing material or to select a material having high reflectance, whiteness, and refractive index. Although the manufacturing method in particular of the cover 20 which has such two types of parts is not ask | required, two-color extrusion molding etc. are mentioned. By having such a configuration, it is possible to obtain an illumination lamp 1E with high light extraction efficiency and good light distribution.

  DESCRIPTION OF SYMBOLS 1 Illumination lamp, 1B illumination lamp, 1C illumination lamp, 1D illumination lamp, 1E illumination lamp, 5 earth base, 6 Power supply base, 10 Light source unit, 11 Light emitting element, 12 Substrate, 13 Heat radiation member, 20 Cover, 20A 1st area | region 20B second region, 20C third region, 20a diffusion film, 20b reflection film, 20c transparent film, 20d first low refractive index film, 20e diffusion part, 20f reflection part, 30 base, 100 power supply socket, 110 earth socket, 120 reflector, 130 lighting device, 140 fixture body, 500 lighting fixture, 600 lighting device, B end, BB end, O center, θ angle.

Claims (11)

A long light source unit including a light emitting element;
A cylindrical cover that is formed to extend in the longitudinal direction of the light source unit and accommodates the light source unit;
With
The cover is
A first region located on the front side which is the light irradiation side of the light emitting element of the light source unit;
A second region connected to the first region and positioned from a connection position with the first region to a back side of the light source unit;
On the outer surface of the second region,
An illumination lamp, wherein a reflective film that reflects light emitted from the light emitting element is formed. On the outer surface of the first region,
The illumination lamp according to claim 1, wherein a diffusion film that diffuses light emitted from the light emitting element is formed. The cover includes
A transparent film is formed on the diffusion film and the reflection film so as to cover the diffusion film formed in the first area and the reflection film formed in the second area. Item 3. An illumination lamp according to Item 2. On the outer surface of the first region,
The illumination lamp according to claim 3, wherein a first low refractive index film having a refractive index smaller than a refractive index of a material constituting the cover is formed on the transparent film. On the outer surface of the first region and the second region,
The illumination lamp according to claim 3, wherein a first low refractive index film having a refractive index smaller than a refractive index of a material constituting the cover is formed on the transparent film. On the outer surface of the first region,
The illumination lamp according to claim 2, wherein a first low refractive index film having a refractive index smaller than a refractive index of a material constituting the cover is formed on the diffusion film. On the inner surface of the first region,
The illumination lamp according to any one of claims 1 to 6, wherein a second low-refractive-index film having a refractive index smaller than a refractive index of a material constituting the cover is formed. The first region is
Consists of a resin in which a light diffusing material is dispersed,
The second region is
The illumination lamp according to claim 1, wherein the illumination lamp is made of a resin in which a light reflecting material is dispersed. The light source unit is
A substrate on which the light emitting element is mounted;
The illumination lamp according to any one of claims 1 to 8, further comprising a heat dissipating member attached to the substrate and disposed on an inner surface of the second region. The light source unit is
The illumination lamp according to any one of claims 1 to 8, further comprising a substrate on which the light emitting element is mounted and disposed on an inner surface of the second region. The illuminating device provided with the illumination lamp as described in any one of Claims 1-10.

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