JP6335635B2 - LIGHTING LAMP AND LIGHTING DEVICE USING THE SAME - Google Patents

Description

  The present invention relates to an illumination lamp in which a light emitting element is housed in a diffusion cover, and an illumination device using the illumination lamp.

  In recent years, an illumination lamp in which a plurality of light emitting elements (LEDs) are arranged in the longitudinal direction has been proposed. In an illumination lamp using a plurality of light emitting elements with high directivity, it is necessary to suppress graininess and glare due to each light emitting element. Conventionally, in order to suppress graininess and glare, it has been proposed to suppress graininess and glare using a cover having a light diffusing function (see, for example, Patent Documents 1 and 2). Cited Document 1 discloses a light transmissive article in which light diffusing particles such as alumina are arranged in a vitreous silica binder as a light diffusing material. Patent Document 2 discloses a lighting device having a cover formed of a light-transmitting resin containing a metal oxide having a hollow portion.

JP-A-6-347618 JP 2011-54340 A

  In order to suppress graininess and glare using a light diffusive cover as in Patent Documents 1 and 2, it is necessary to increase the light diffusibility of the entire cover. However, if the light diffusibility of the entire cover is increased, there arises a problem that the illuminance of the illumination lamp decreases.

  The present invention has been made to solve the above-described problems, and provides an illumination lamp capable of preventing or suppressing a decrease in illuminance while suppressing graininess and glare, and an illumination device using the same. It is intended to provide.

The illumination lamp of the present invention includes a light emitting unit that emits light, a light-transmitting cover main body that accommodates the light emitting unit, and a diffusion film that is provided on a wall surface of the cover main body and diffuses light emitted from the light emitting unit. A diffusion cover, a first area formed at a position including the optical axis of the light emitted from the light emitting portion, diffused and transmitted by the diffusion film, and more light transmissive than the first area. A first region is a region corresponding to a light distribution angle of light emitted from the light emitting portion, and the diffusion film includes a first diffusion film provided in the first region, And a second diffusion film provided only in the first region on the first diffusion film, the first diffusion film and the second diffusion film have a cavity formed in the base material, and the second diffusion film is formed from the light emitting portion. And a phosphor that emits light when excited by the light .

  According to the illumination lamp of the present invention, the diffusion cover includes the first region that includes the optical axis of the light emitting unit and diffuses and transmits the light through the diffusion film, and the second region that has a higher light transmittance than the first region. By being formed, the graininess and glare of the light emitting part are suppressed in the first region, and strong light is emitted from the second region, so that a decrease in illuminance is prevented or suppressed while suppressing graininess and glare. can do.

It is a perspective view of the illuminating device using the illumination lamp which concerns on Embodiment 1 of this invention. It is a partially cutaway perspective view which shows an example of the illumination lamp attached to the illuminating device of FIG. It is sectional drawing which shows the III-III cross section of the illumination lamp of FIG. It is a perspective view which shows an example of the cover of the illumination lamp of FIG. It is sectional drawing which shows an example of the diffusion film in the illumination lamp of FIG. It is a schematic diagram which shows a mode that light diffuses in the 1st diffusion film of FIG. It is a schematic diagram which shows an example of the 2nd diffusion film of FIG. It is sectional drawing which shows the illuminating device with which the illumination lamp was mounted | worn with the lighting fixture of FIG. It is sectional drawing which shows the modification 1 of the diffusion film in the illumination lamp of FIG. It is sectional drawing which shows the illumination lamp which concerns on Embodiment 2 of this invention. It is a schematic diagram which shows an example of the diffusion film in the illumination lamp of FIG. It is sectional drawing which shows the modification 2 of the diffusion film in the illumination lamp of FIG. It is sectional drawing which shows the modification 3 of the diffusion film in the illumination lamp of FIG. It is a schematic diagram which shows the illumination lamp which has a light bulb shape.

Embodiment 1. FIG.
Hereinafter, embodiments of an illumination lamp of the present invention and an illumination device using the same will be described with reference to the drawings. In addition, this invention is not limited by embodiment described below. In addition, in the following drawings including FIG. 1, the relationship between the shape of each component and the size of each component may be different from the actual one. FIG. 1 is a perspective view of an illumination device using an illumination lamp according to Embodiment 1 of the present invention.

(Lighting device 30)
The illuminating device 30 in FIG. 1 is, for example, an embedded type that is embedded in a ceiling or installed in a room or a passage, and includes an illuminating lamp 1 having a straight tube shape, and an illuminating lamp 1. And a lighting fixture 20 to be attached. The lighting fixture 20 includes a main body 21 that extends in one direction (the direction of the arrow Y), and sockets 22 that are formed at both ends of the main body 21. The both ends of the lighting lamp 1 are inserted into the socket 22 and attached to the lighting fixture 20.

  2 is a partially cutaway perspective view showing an example of the illumination lamp 1 attached to the illumination device 30 of FIG. 1, and FIG. 3 is a cross-sectional view of the illumination lamp 1 in FIG. The illumination lamp 1 in FIGS. 2 and 3 is, for example, a straight tube LED lamp. The illumination lamp 1 includes a light source module 10, a power supply base 13, a ground base 14, and a diffusion cover 2.

(Light source module 10)
The light source module 10 includes a light emitting unit 11 and a heat sink 12 on which the light emitting unit 11 is installed. The light emitting unit 11 includes, for example, a plurality of light emitting elements 11a and a wiring pattern (not shown) on one surface. And a substrate 11b on which the light emitting element 11a is mounted.

(Light emitting element 11a)
The light emitting element 11a is made of, for example, an LED, and a plurality of the light emitting elements 11a are mounted on the substrate 11b. The light emitting element 11a has a light distribution characteristic such that the light distribution angle 2θ = 120 °, for example, with the optical axis CL as the center. The light emitting element 11a is positioned at a position shifted by Δr from the center in the diffusion cover 2 having an inner diameter r. The plurality of light emitting elements 11a are linearly arranged in a line along the longitudinal direction (arrow Y direction), for example, on the surface of the substrate 11b. Each light emitting element 11a forms a light source circuit by being connected to a wiring pattern provided on one surface of the substrate 11b. As the light emitting element 11a, for example, a pseudo white LED packaged by providing a phosphor that converts blue light into yellow light on an LED chip that emits blue light having a wavelength of about 440 nm to 480 nm can be used. . In this embodiment, the light emitted from the light source module 10 is emitted in a predetermined direction (the direction of the arrow L).

  In addition, you may use COB (Chip On Board) etc. with which the LED chip was directly mounted in the board | substrate 11b. Further, the number, arrangement, or type of the light emitting elements 11a can be appropriately changed according to the use of the illumination lamp 1 or the like. Furthermore, as the light emitting element 11a, for example, a light emitting element (device) such as an LD (laser diode) or an organic EL can be used. When an organic EL or the like is used as the light emitting element 11a, a single plate-like EL element extending in one direction is mounted on the substrate 11b instead of mounting the plurality of light emitting elements 11a on the substrate 11b. Also good.

(Substrate 11b)
The substrate 11b has, for example, a shape extending in the longitudinal direction (arrow Y direction), and a plurality of light emitting elements 11a are mounted on the substrate 11b along the longitudinal direction (arrow Y direction). Further, a lighting circuit element (not shown) made of a diode, a fuse, a resistor, or the like for lighting the light emitting element 11a is mounted on the substrate 11b. And the board | substrate 11b is electrically connected with the electric power feeding terminal 13a of the electric power feeding base 13 in the end, and the lighting circuit element of the board | substrate 11b is electrically fed via the electric power feeding terminal 13a from an external power supply. Thereby, the plurality of light emitting elements 11a are turned on.

  As a material of the substrate 11b, a glass epoxy material, a paper phenol material, a composite material, or a metal material such as aluminum (Al) is selected and used in consideration of component arrangement, heat dissipation, and material cost. The thickness of the substrate 11b is, for example, about 1 mm, but may be thicker or thinner than 1 mm. In addition, in order to improve the utilization efficiency of the light emitted from the light emitting element 11a, a reflective material may be formed on the surface of the substrate 11b using a method such as coating, printing, or vapor deposition. In this case, the use efficiency of light can be further improved by forming a reflective material on the surface of the substrate 11b on which the light emitting element 11a is mounted.

(Heat sink 12)
The heat sink 12 has, for example, a shape extending in the longitudinal direction (arrow Y direction) and is made of a material having thermal conductivity. The heat sink 12 includes a flat portion 12 a and an arc portion 12 b, and the light emitting portion 11 is mounted on the flat portion 12 a of the heat sink 12. Specifically, the longitudinal direction (arrow Y direction) of the substrate 11b of the light emitting unit 11 is installed in parallel to the longitudinal direction (arrow Y direction) of the flat portion 12a of the heat sink 12.

  The heat sink 12 is bonded to the cylindrical diffusion cover 2 using, for example, an adhesive, and the surface of the heat sink 12 that is bonded to the diffusion cover 2 has an arc shape along the inner wall of the diffusion cover 2. It is formed in the arc portion 12b. In this way, the heat sink 12 connects the substrate 11b of the light emitting unit 11 and the diffusion cover 2, so that the heat sink 12 transmits operating heat generated from the light emitting element 11a to the diffusion cover 2 for illumination. Heat is dissipated outside the lamp 1.

  In addition, the heat sink 12 is provided with the rigidity required to support the longitudinal direction (arrow Y direction) of the illumination lamp 1, and it is preferable that a linear expansion coefficient is small. The heat sink 12 may be formed by extrusion molding of a metal material, but may be formed by a method other than extrusion molding. As this metal material, aluminum (Al), iron (Fe), or the like can be used. The heat sink 12 may be ceramic instead of a metal material, or may be a high thermal conductive resin to which a filler having thermal conductivity is added.

(Power feed cap 13)
The power supply cap 13 is attached to one end side of the diffusion cover 2. The power supply base 13 includes a pair of conductive power supply terminals 13a and a bottomed cylindrical power supply base case 13b (base member) in which these power supply terminals 13a are embedded. The power supply terminal 13a is electrically connected to one end of the board 11b, and is connected to an external power source of the lighting fixture 20, whereby the lighting circuit element of the board 11b is supplied with power.

  The power supply terminal 13a is made of, for example, a conductive metal material, and the power supply base case 13b is made of, for example, an insulating resin material. The power supply terminal 13a and the power supply base casing 13b are integrally formed by insert molding or the like. The power supply base 13 may be a GX16 type base, for example, but other types of bases, such as a G13 type base, may be used. The power supply terminal 13 a of the power supply base 13 is connected to the terminal of the socket 22.

(Earth cap 14)
The ground cap 14 is attached to the other end of the diffusion cover 2. The ground base 14 includes a ground terminal 14a having conductivity and a bottomed cylindrical ground base casing 14b (base member) in which the ground terminal 14a is embedded. By connecting the ground terminal 14a to the ground portion of the lighting fixture 20, the illumination lamp 1 is electrically grounded.

  The ground terminal 14a is made of, for example, a conductive metal material, and the ground base casing 14b is made of, for example, an insulating resin material. The ground terminal 14a and the ground cap casing 14b are integrally formed by insert molding or the like. The ground base 14 can be a GX16 type base, for example, but other types of bases such as a G13 type base can also be used. The ground terminal 14 a of the ground base 14 is connected to the terminal of the socket 22.

(Diffusion cover 2)
FIG. 4 is a perspective view showing an example of the diffusion cover 2 of the illumination lamp 1 of FIG. 2, and the diffusion cover 2 will be described with reference to FIGS. The diffusion cover 2 is also called an outer tube valve, a tube tube or a straight tube, and is a cylindrical member extending in the longitudinal direction (arrow Y direction), for example, in which the light emitting unit 11 is accommodated. Is. As shown in FIGS. 3 and 4, the diffusion cover 2 is provided on a light-transmissive cover main body 3 that houses the light emitting unit 11 and a wall surface of the cover main body 3, and diffuses to diffuse light emitted from the light emitting unit 11. And a membrane 4. The cover body 3 is formed in a long cylindrical shape, and is made of, for example, a glass tube or a resin tube.

  FIG. 5 is a cross-sectional view showing an example of the diffusion film 4 in the illumination lamp 1 of FIG. The diffusion film 4 diffuses the light emitted from the light emitting element 11a, and includes a first diffusion film 4A provided over the entire circumference of the inner wall surface 3a of the cover body 3, and a part on the first diffusion film 4A. And a second diffusion film 4B provided in the region. The diffusion cover 2 is formed with a first region PR1 in which both the first diffusion film 4A and the second diffusion film 4B are provided, and a second region PR2 in which only the first diffusion film 4A is provided. Has been.

  The first diffusion film 4A diffuses the light emitted from the light emitting element 11a, and has a thickness of, for example, 5 μm to 20 μm. The first diffusion film 4 </ b> A is formed by applying a resin (binder) to which the diffusion material 5 is added to the inner wall surface 3 a of the cover body 3. The substrate 6 is made of, for example, a water-soluble thermosetting resin or low-melting glass, and the diffusion material 5 is made of, for example, silica having an average particle diameter of 0.05 μm to 20 μm. The content of the diffusing material 5 in the first diffusion film 4A is, for example, 10% to 70% by volume. In other words, the content of the base material 6 in the first diffusion film 4A is 90% or more and 30% or less by volume ratio. The first diffusion film 4A is prepared by dispersing a diffusing material 5 such as silica in a resin solution to produce a suspension, pouring the suspension into the cover body 3, applying the suspension, The suspension is dried and cured by heating.

  Further, when the substrate 6 is made of a resin, a cavity 7 having a diameter of 2.0 μm or less is formed in the first diffusion film 4A. The cavity 7 is a space formed by remaining bubbles in the substrate 6, and the substrate 6 and the diffusing material 5 do not exist in the cavity 7. The suspension in which the diffusing material 5 is dispersed is a mixture of bubbles, but if the suspension is allowed to stand, the bubbles are discharged from the suspension. Normally, a suspension in which bubbles do not remain is applied. However, by intentionally applying a suspension in which bubbles remain, a cavity 7 is formed after drying.

  FIG. 6 is a schematic diagram showing how light diffuses in the first diffusion film of FIG. As shown in FIG. 6, the light incident on the first diffusion film 4 </ b> A passes through the base material 6 while being absorbed little by little, and is reflected in multiple directions on the surface of the diffusion material 5 to be reflected in the first diffusion film 4 </ b> A. Diffused. The light incident on the cavity 7 travels straight through the space in the cavity 7 and is reflected by the surface of the diffusing material 5 at the straight ahead. At this time, as the number of the cavities 7 is larger and the volume of the cavities 7 is larger, the amount of light absorbed by the substrate 6 is reduced, and the light transmittance is improved.

  FIG. 7 is a schematic diagram showing an example of the second diffusion film 4B of FIG. The second diffusion film 4B shown in FIGS. 5 and 7 is formed on the first diffusion film 4A. Like the first diffusion film 4A described above, the diffusion material 5 is added to the substrate 6, and It has a structure in which a cavity 7 is formed in the material 6. Furthermore, the second diffusion film 4B includes a phosphor FL that is excited by light from the light emitting unit 11 and emits light. The phosphor FL, for example, is composed of a phosphor that absorbs a near-infrared wavelength region shorter than the excitation wavelength of 400 nm and emits fluorescence of 400 nm or more, for example. In addition, a quantum dot may be used as this fluorescent substance FL.

  In FIG. 5, the light emitted from the light emitting unit 11 enters the first diffusion film 4A in the first region PR1 and the second region PR2 and is diffused. Thereafter, in the second region PR2, the light diffused by the first diffusion film 4A is emitted to the outside through the cover body 3. On the other hand, in the first region PR1, the light diffused and emitted from the first diffusion film 4A is incident on the second diffusion film 4B. Thereafter, light is diffused in the second diffusion film 4B and emitted from the cover main body 3, and the phosphor FL is excited to emit light having a predetermined wavelength from the cover main body 3. Thus, the first region PR1 in which the first diffusion film 4A and the second diffusion film 4B are formed has a lower light transmittance than the second region PR2 in which only the first diffusion film 4A is formed. At this time, since the first region PR1 contains the phosphor FL, it is possible to suppress a reduction in the amount of light emitted from the first region PR1. It should be noted that the film thickness and the like of the first diffusion film 4A and the second diffusion film 4B in the first region PR1 are appropriately set so that the graininess and glare of the light emitting unit 11 can be suppressed.

  As shown in FIGS. 2 and 3, the first region PR <b> 1 is formed in a strip shape with a predetermined arc length (width) including the optical axis CL of the light emitting unit 11 extending in the longitudinal direction (arrow Y direction). In particular, the first region PR1 has an arc length corresponding to a light distribution angle 2θ (for example, 120 °) around the optical axis CL in the circumferential direction. FIG. 8 is a cross-sectional view showing an illuminating device in which an illuminating lamp is mounted on the luminaire of FIG. As shown in FIG. 8, when the illumination lamp 1 is attached to the illuminating device 30 so that the light emission part 11 is located on the vertically upper side, the first region PR1 is located on the vertically lower side. And when a person looks at the illumination lamp 1 from the bottom, the granular feeling of the some light emission part 11 can be suppressed by 1st area | region PR1.

  Thus, since the first region PR1 has a higher light transmittance than the second region PR2, it is possible to prevent or suppress a decrease in illuminance. That is, when the light transmittance is uniform over the entire circumference as in the conventional diffusion cover, when the graininess and glare are suppressed, the amount of light emitted from the diffusion cover 2 is also reduced and the illuminance is lowered. . Therefore, using the fact that graininess and glare are generated in the peripheral region of the optical axis CL, in the first region PR1 including the optical axis CL, the light diffusion characteristic is increased to suppress graininess and glare, and the second region PR2 In, the light transmittance can be increased to prevent or suppress the decrease in illuminance. Further, in the illumination lamp 1, the second region PR2 and the first region PR1 are formed depending on the presence or absence of the first diffusion film 4A. Therefore, the light distribution control can be performed by forming the first region PR1 with a simple structure. it can.

  In particular, since the phosphor FL is contained in the second diffusion film 4B in the first region PR1, the directivity of the emitted light is lowered because light can be irradiated at a wide angle, and the graininess of the light emitting unit 11 is reduced. Can be further reduced. Further, when the first region PR1 is formed so as to include the optical axis CL of the light emitting unit 11 in the circumferential direction, direct light from the light emitting unit 11 and the inner wall surface 3a of the diffusion cover 2 from the first region PR1. Indirect light that is reflected and emitted is emitted. Since direct light is very bright, it is possible to reduce the graininess that the outer shape of each light emitting unit 11 is recognized, and to perform light distribution without soft glare.

Modification 1
In FIG. 3 to FIG. 8, the first diffusion film 4 </ b> A and the second diffusion film 4 </ b> B are illustrated as a case where the first diffusion film 4 </ b> A and the second diffusion film 4 </ b> B are configured by the base material 6 having the cavity 7 in which the diffusion material 5 is added to the base material 6. The structure is not limited to this as long as it has a light diffusion function, and various diffusion films can be used. FIG. 9 is a cross-sectional view showing Modification 1 of the diffusion film in the illumination lamp of FIG. As shown in FIG. 9, the first diffusion film 4 </ b> A is made of the base material 6 in which only the cavities 7 are formed, for example. That is, the first diffusion film 4A has a structure in which a diffusion effect is obtained only by the cavities 7 generated in the process of solidifying (curing) the base material 6. The refractive index of resin (acrylic) = 1.49 (or the refractive index of glass = 1.485), whereas the refractive index of air = 1.003. Therefore, light is refracted at the interface between the substrate 6 (resin or glass) and the cavity 7 to obtain a light diffusion effect. The size, shape, and amount of the cavity 7 described above are controlled by the reaction time, reaction temperature, and the like of the difference in film formation.

  In the second diffusion film 4B, the diffusion material 5 is not added, only the cavity 7 is formed in the base material 6, and the phosphor FL is contained. As described above, in the first region PR1, since light is diffused and emitted by the first diffusion film 4A and the second diffusion film 4B, the light transmittance is lower than that of the second region PR2.

  Even in this case, the second region PR2 has a light transmittance higher than that of the first region PR1, thereby suppressing graininess and glare of the illumination lamp 1 using the plurality of light emitting units 11. it can. Further, since the phosphor FL is included in the second diffusion film 4B, the light can be irradiated at a wide angle, so that the directivity of the emitted light is lowered, and the graininess and glare are further reduced. A decrease in brightness of the region PR1 can be suppressed.

Embodiment 2. FIG.
FIG. 10 is a sectional view showing Embodiment 2 of the diffusion cover in the illumination lamp of the present invention, and the illumination lamp 100 will be described with reference to FIG. In addition, in the illumination lamp 100 of FIG. 10, the same code | symbol is attached | subjected to the site | part which has the same structure as the illumination lamp 1 of FIG. 3, and the description is abbreviate | omitted. The illumination lamp 100 of FIG. 10 differs from the illumination lamp 1 of FIG. 3 in that the diffusion film 104 is provided only in the first region PR1.

  In the diffusion cover 102 of FIG. 10, the diffusion film 104 is provided only in the first region PR1, and the diffusion film 104 is not provided in the second region PR2. FIG. 11 is a cross-sectional view showing an example of the diffusion film 104 in the illumination lamp 100 of FIG. The diffusion film 104 shown in FIG. 11 has a cavity 7 in which the diffusion material 5 is added to the base material 6 as in the first diffusion film 4A described above, for example. Note that the diffusion film 104 is not limited to the above-described configuration, and may be one in which the phosphor FL is added to the substrate 6 having the cavity 7 in which the diffusion material 5 is added. Thus, even when the diffusion film 104 is provided only in the first region PR1, the graininess and glare of the light emitting unit 11 can be suppressed.

Modification 2
12 is a cross-sectional view showing a second modification of the diffusion film in the illumination lamp 100 of FIG. As shown in FIG. 10, the diffusion film 104 </ b> A is composed of the base material 6 without adding the diffusion material 5 and having only the cavities 7, similar to the first diffusion film 4 </ b> A of FIG. 9. That is, the first diffusion film 4A has a structure in which a diffusion effect is obtained only by the cavities 7 generated in the process of solidifying (curing) the base material 6. Even in this case, the second region PR2 has a light transmittance higher than that of the first region PR1, thereby suppressing graininess and glare of the illumination lamp 1 using the plurality of light emitting units 11. it can.

Modification 3
FIG. 13 is a cross-sectional view showing Modification 3 of the diffusion film in the illumination lamp 100 of FIG. In FIG. 13, the diffusion film 104 </ b> B is composed of the base material 6 containing only the phosphor FL. Even in this case, the second region PR2 has a light transmittance higher than that of the first region PR1, thereby suppressing graininess and glare of the illumination lamp 1 using the plurality of light emitting units 11. it can. In addition, since the diffusion film 104B includes the phosphor FL, it is possible to irradiate light at a wide angle, thereby reducing the directivity of the emitted light, further reducing graininess and glare, and reducing the first region PR1. A decrease in brightness can be suppressed. Note that the cavity 7 may be formed in the base material 6 in the diffusion film 104B.

  Embodiments of the present invention are not limited to the above embodiments. For example, in the above embodiment, the case of a so-called straight tube type illumination lamp 1 is illustrated, but the present invention can also be applied to an illumination lamp having a bulb shape. FIG. 14 is a schematic diagram showing an illumination lamp 200 having a bulb shape. As shown in FIG. 14, the illumination lamp 200 includes a diffusion cover 201, a main body 202, and a base 203. Among these, the diffusion cover 201 is formed in a dome shape. For example, a circular first region PR1 is formed at the top, and a second region PR2 is formed in other regions. Furthermore, it may be applied not only to a straight tube shape or a dome shape, but also to an illumination lamp of a surface light source in which a plurality of light emitting portions 11 are arranged in a lattice shape.

  Further, although the case where the first diffusion film 4 </ b> A is provided on the inner wall surface 3 a of the diffusion cover 2 is illustrated, it may be formed on the outer wall surface side of the cover body 3. Further, the first diffusion film 4A is illustrated as being formed by applying a resin and a diffusion material to the inner wall surface 3a of the cover body 3, but is formed by attaching a diffusion film to the inner wall surface 3a or the outer wall surface. It may be what you did. Further, in each of the above embodiments, the first region PR1 only needs to have a light transmittance lower than that of the second region PR2, and the first region PR1 is also provided with the first diffusion film 4A. The light transmittance may be controlled by changing the film thickness of the first diffusion film 4A and the first diffusion film 4A in the second region PR2. Moreover, in the said embodiment, although illustrated about the case where the diffusion films 4 and 104 are directly provided in the cover main body 3, you may provide the diffusion films 4 and 104 via the protective film. .

  1, 100, 200 Illumination lamp 2, 102, 201 Diffusion cover, 3 Cover body, 3a Inner wall surface, 4, 104, 104A, 104B Diffusion film, 4A First diffusion film, 4B Second diffusion film, 5 Diffusion material, 6 base material, 7 cavity, 10 light source module, 11 light emitting part, 11a light emitting element, 11b substrate, 12 heat sink, 12a flat part, 12b arc part, 13 power supply base, 13a power supply terminal, 13b power supply base case, 14 ground base , 14a Ground terminal, 14b Ground base housing, 20 Lighting fixture, 21 Body part, 22 Socket, 30 Lighting device, 202 Body, 203 Base part, CL optical axis, FL phosphor, PR1 first region, PR2 second region 2θ Light distribution angle.

Claims (5)

A light emitting unit for emitting light;
A diffusing cover having a light transmissive cover main body that accommodates the light emitting portion, and a diffusion film that is provided on a wall surface of the cover main body and diffuses light emitted from the light emitting portion,
The diffusion cover is formed at a position including the optical axis of the light emitted from the light emitting unit, and has a first region through which light is diffused and transmitted by the diffusion film, and has a higher light transmittance than the first region. A second region is formed ,
The first region is a region corresponding to a light distribution angle of light emitted from the light emitting unit,
The diffusion film has a first diffusion film provided in the first region, and a second diffusion film provided only in the first region on the first diffusion film,
The first diffusion film and the second diffusion film have a cavity formed in a base material,
The illumination lamp, wherein the second diffusion film includes a phosphor that emits light when excited by light from the light emitting unit . A light emitting unit for emitting light;
A diffusing cover having a light transmissive cover main body that accommodates the light emitting portion, and a diffusion film that is provided on a wall surface of the cover main body and diffuses light emitted from the light emitting portion,
The diffusion cover is formed at a position including the optical axis of the light emitted from the light emitting unit, and has a first region through which light is diffused and transmitted by the diffusion film, and has a higher light transmittance than the first region. A second region is formed ,
The diffusion film has a first diffusion film provided only in the first region, and a second diffusion film provided on the first diffusion film,
The first diffusion film and the second diffusion film have a cavity formed in a base material,
The illumination lamp, wherein the second diffusion film includes a phosphor that emits light when excited by light from the light emitting unit . The cover body has a straight pipe shape,
The illumination lamp according to claim 1 or 2, wherein the first region is formed in a strip shape in a longitudinal direction of the cover body. The first diffusion layer, the illumination lamp according to any one of claims 1 to 3, characterized in that consist of only a cavity in the substrate is formed. The illumination lamp according to any one of claims 1 to 4 ,
A socket to which the illumination lamp is attached;
An illuminating device, comprising: an appliance main body to which the socket is attached and which holds the illuminating lamp.

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