JP6335634B2 - 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 light emitting element with high directivity, an illumination device that illuminates an object to be displayed using direct light and indirect light emitted from the light emitting element has been proposed (for example, Patent Documents). 1). Patent Document 1 has a front control plate arranged on the front surface of the LED and a side control plate arranged on the side surface of the LED, and the light transmitted through the front control plate is directly irradiated to the display object or the like. In addition, a lighting device is disclosed in which light transmitted through a side control plate is diffused and reflected on a side wall or the like of a showcase to irradiate a display object or the like.

  Further, in an illumination lamp using such a light emitting element, a structure for changing the irradiation direction of the light emitting element has been proposed (for example, see Patent Document 2). Patent Document 2 discloses an illumination device in which a substrate on which a light emitting element is mounted is built in a rotatable manner with respect to an illumination tube, and the illumination tube has nonuniform transmission light characteristics in the circumferential direction. .

JP 2011-138700 A JP 2012-15012 A

  However, in the illumination device of Patent Document 1, in order for the front control plate and the side control plate to have a predetermined function, the front control plate and the side control plate need to have a lens function. The structure of the control plate becomes complicated. Further, as in Patent Document 2, when the substrate has a structure that can be rotated, it is necessary that electrical connection between the substrate and the socket terminal is made even if the substrate rotates. There is a problem that the structure becomes complicated.

  The present invention has been made to solve the above problems, and an illumination lamp capable of irradiating strong light in a specific direction while illuminating a space with a simple structure, and illumination using the same The object is to provide a device.

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. and a diffusion cover, the diffusion cover, light transmission region for transmitting light emitted from the light emitting portion is formed, the light transmission region, a light diffusion area which diffuses is provided a light diffusion layer diffusion layer is not provided than the light diffusion regions all SANYO having a light transmittance higher open area, the diffusion film is for a cavity for diffusing light is formed on a base material, an opening region, Ru der those formed so as to include the optical axis of the light.

  According to the illumination lamp of the present invention, a light diffusing region and an opening region having a higher light transmittance than the light diffusing region are formed in the light transmitting region of the cover, so that light stronger than the light diffusing region is emitted from the opening region. Since it emits, it is possible to irradiate strong light in a specific direction while illuminating the space with a simple structure.

It is a perspective view of the illuminating device using the illumination lamp which concerns on Embodiment 1 of this invention. It is the perspective view which notched a part of diffusion cover which shows an example of the illumination lamp attached to the illuminating device of FIG. It is a perspective view which shows an example of the illumination lamp and cover of FIG. It is sectional drawing which shows the III-III cross section of the illumination lamp of FIG. It is sectional drawing which shows an example of the light-diffusion film | membrane in the illumination lamp of FIG. It is a schematic diagram which shows an example of the path | route of the light in the light-diffusion film | membrane of FIG. It is sectional drawing which shows an example of the opening area | region in the illumination lamp of FIG. It is a schematic diagram which shows the example of installation of the illuminating device of FIG. It is sectional drawing which shows the modification of the light-diffusion area | region 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. Moreover, in the following drawings including FIG. 1, the relationship of 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 perspective view in which a part of a diffusion cover showing an example of the illumination lamp 1 attached to the illumination device 30 in FIG. 1 is cut away, and FIG. 3 is a perspective view showing an example of the illumination lamp and the cover in FIG. . 2 and 3 is, for example, a straight tube LED lamp, and 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 is 120 ° around the optical axis CL, for example. 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 the present embodiment, the light emitted from the light emitting element 11a is emitted in a predetermined direction (arrow L direction).

  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 it supplies electric power to the lighting circuit element of the board | substrate 11b 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)
4 is a cross-sectional view taken along the line III-III in FIG. 2, and is a cross-sectional view illustrating an example of the illumination lamp 1 and the diffusion cover 2 of FIG. The diffusion cover 2 will be described with reference to FIGS. 3 and 4. 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 the light-transmissive cover main body 3 that houses the light emitting unit 11 and the inner wall surface 3 a of the cover main body 3, and diffuses the light emitted from the light emitting unit 11. The diffusion film 4 is provided. The cover body 3 is formed in a long cylindrical shape, and is formed using, for example, light-transmitting glass or a resin material.

  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 has a thickness of 5 μm to 20 μm, for example. The diffusion film 4 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 diffusion material 5 in the diffusion film 4 is, for example, 10% or more and 70% or less by volume ratio. In other words, the content of the base material 6 in the diffusion film 4 is 90% or more and 30% or less by volume ratio. The diffusion film 4 is prepared by dispersing a diffusion material 5 such as silica in a resin solution to prepare a suspension, pouring the suspension into the cover body 3, applying the suspension, and suspending with hot air. The suspension is formed by drying and curing by heating.

  Further, when the substrate 6 is made of resin, the diffusion film 4 is formed with a cavity 7 having a diameter of 2.0 μm or less. The cavity 7 is a space formed by leaving 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 disappear from the suspension. Usually, a suspension without bubbles is applied, but by intentionally applying a suspension containing bubbles, a cavity 7 is formed after drying.

  FIG. 6 is a schematic diagram showing an example of a light path in the diffusion film 4 of FIG. As shown in FIG. 6, the light incident on the diffusion film 4 passes through the substrate 6 while being absorbed little by little, is reflected in multiple directions on the surface of the diffusion material 5, and is diffused in the diffusion film 4. 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. The light diffused in the diffusion film 4 is emitted from the diffusion cover 2 to the outside. For example, 96% of the light incident on the diffusion film 4 is emitted from the diffusion cover 2.

  Here, as shown in FIG. 4, in the circumferential direction and the longitudinal direction of the diffusion cover 2, the light shielding region SR covered with the heat sink 12, the front side and the side surface side of the light emitting unit 11, A light transmission region PR that transmits the emitted light is formed. Further, in this light transmission region PR, a light diffusion region DR that diffuses and transmits light, and an opening region AR having a light transmittance higher than that of the light diffusion region DR are formed.

  The light diffusion region DR is a region where the diffusion film 4 is provided, and is a region where light is diffused and emitted to the outside. On the other hand, the opening area AR is an area in which the diffusion film 4 is not formed, and the light emitted from the light emitting unit 11 passes through the cover body 3 and is emitted as it is. FIG. 7 is a cross-sectional view showing an example of the opening area AR in the illumination lamp of FIG. In other words, the diffusion film 4 is provided in a region excluding the opening region AR on the inner wall surface of the cover body 3. Therefore, light is emitted from the light diffusion region DR in a state where the light is diffused by the diffusion film 4. On the other hand, direct light from the light emitting part 11 and indirect light reflected and emitted from the inner wall surface 3a of the diffusion cover 2 are emitted from the opening area AR. As a result, the intensity of light emitted from the opening area AR is greater than the intensity of light emitted from the light diffusion area DR. That is, the light distribution direction is controlled so that strong light is emitted from the position where the opening area AR is formed in the diffusion cover 2.

  As shown in FIGS. 2 and 4, the opening area AR is formed in a band shape with a predetermined arc length (width) including the optical axis CL of the light emitting portion 11 extending in the longitudinal direction (arrow Y direction). In particular, the opening area AR has an arc length corresponding to the central angle 2θ around the optical axis CL in the circumferential direction. Therefore, when the illumination lamp 1 is attached to the lighting device 30 so that the light emitting unit 11 is positioned vertically upward, the opening area AR is positioned vertically downward. Therefore, the illumination lamp 1 has a light distribution characteristic in which light stronger than the side is emitted toward the lower side.

  FIG. 8 is a schematic view showing an installation example of the illumination device 30 using the illumination lamp 1 of FIG. FIG. 8 illustrates the case where the lighting device 30 is installed in the indoor passage. In FIG. 8, a plurality of lighting devices 30 are embedded in the ceiling, and the lighting lamps 1 with the opening area AR facing downward are attached to each lighting device 30. Then, the light emitted from the opening area AR forms a linear irradiation area LA having a higher illuminance than the other areas on the floor of the passage. Note that the width of the irradiation area LA depends on the size of the opening area AR and the distance H from the ceiling to the floor.

  The formation position of the opening region AR is not limited to the position including the optical axis CL described above, and may be formed at any position within the light transmission region PR. For example, if the opening area AR is formed at a position shifted by 90 ° in the circumferential direction with respect to the optical axis CL of the light emitting unit 11, the light distribution characteristic is such that light emitted from the position shifted by 90 ° becomes strong. It will be. Therefore, it is possible to perform light distribution control such as irradiating strong light on the paintings and the like displayed on the wall of FIG. By using the same diffusion cover 2 and simply adjusting the mounting angle of the light emitting unit 11 with respect to the opening area AR, it is possible to easily manufacture an illumination lamp having various light distribution characteristics. Alternatively, the attachment angle of the power supply cap 13 and the ground cap 14 may be adjusted.

  Thus, by forming the light diffusion region DR and the opening region AR having a higher light transmittance than the light diffusion region DR in the light transmission region PR of the diffusion cover 2 with or without the diffusion film 4, the structure is simple. It is possible to perform light distribution control that irradiates strong light in a specific direction while illuminating the space. That is, when a member having a predetermined optical characteristic such as a prism is used for the cover as in the conventional case, the structure of the cover becomes complicated and the manufacturing process becomes complicated. On the other hand, in the illumination lamp 1 described above, since the light diffusion region DR and the opening region AR are formed depending on the presence or absence of the diffusion film 4, the light distribution control can be performed by forming the opening region AR with a simple structure.

  Further, when the opening area AR is formed so as to include the optical axis CL of the light emitting section 11 in the circumferential direction, the opening area AR reflects the direct light from the light emitting section 11 and the inner wall surface 3a of the diffusion cover 2. And indirect light 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
3 to 8 exemplify the case where the diffusion film 4 is composed of a base material 6 having a cavity 7 to which a diffusing material 5 is added, etc. Without being limited, diffusion films having various structures can be used. The diffusion film 4 may be made of, for example, the base material 6 in which only the cavity 7 is formed. FIG. 9 is a cross-sectional view showing a first modification of the light diffusion region DR in the illumination lamp 1 of the first embodiment. As shown in FIG. 9, the diffusion film 4 has a structure in which a diffusion effect is obtained only by the cavities 7 generated in the process of solidifying (curing) the substrate 6. That is, 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 resin (or glass) 6 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.

  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. 10 is a schematic diagram showing an illumination lamp 200 having a bulb shape. As shown in FIG. 10, 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 opening area AR is formed at the top, and a light diffusion area DR is formed in other areas. Even in this case, the formation position of the opening region AR is not limited to the top, and may be formed at any position. Further, the shape is not limited to a circle, and may be formed in a predetermined design.

  Moreover, although the case where the opening area | region AR of one line (rectangular shape) is formed in the said embodiment, the opening area | region AR of a some line may be formed in slit shape. Moreover, although the case where the opening area AR is formed in a line shape is illustrated, it is not limited to this shape. For example, the opening area AR may be formed in a circular shape or a predetermined design such as a wave shape or an arrow shape. It may be formed. Furthermore, although the case where the diffusion film 4 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.

  Moreover, although the diffusion film 4 has illustrated about the case where it forms by apply | coating resin and a diffusion material to the inner wall surface of a cover main body, it may be formed by sticking a diffusion film on an inner wall surface. Further, in each of the above embodiments, the opening area AR only needs to have a light transmittance higher than that of the light diffusion area DR, and the diffusion film 4 is also provided in the opening area AR. The light transmittance may be controlled by changing the film thickness of the diffusion film 4 in the region DR.

  Further, a protective film in which a diffusion material is added may be formed between the cover body 3 and the diffusion film 4. Then, it is possible to prevent the occurrence of uneven coating due to the irregular flow of the liquid due to fine scratches on the glass surface, and improve the aesthetic appearance by making the scratches on the inner surface of the glass invisible from the outside. Furthermore, light can be diffused by the diffusion material of the protective film. This protective film may be formed on the entire inner wall surface 3a of the cover body 3 including the opening area AR and the light diffusion area DR, and neither the diffusion film 4 nor the protective film is provided in the opening area AR. May be.

  DESCRIPTION OF SYMBOLS 1,200 Illumination lamp, 2,201 Diffusion cover, 3 Cover main body, 3a Inner wall surface, 4 Diffusion film, 5 Diffusing 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 circular arc part, 13 power supply base, 13a power supply terminal, 13b power supply base case, 14 ground base, 14a ground terminal, 14b ground base case, 20 lighting fixture, 21 body part, 22 socket, 30 Illumination device, AR opening region, CL optical axis, DR light diffusion region, H distance, LA irradiation region, PR light transmission region, SR light shielding region.

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 with a light transmission region that transmits light emitted from the light emitting unit,
What the light transmission region, which has a light diffusion area which diffuses the light the diffusion layer is provided, and a light transmittance high aperture region than the diffusion layer is not provided the light diffusion area der is,
The diffusion film is a substrate in which a cavity for diffusing the light is formed in a base material,
The illumination lamp , wherein the opening region is formed so as to include an optical axis of the light . The cover body has a straight pipe shape,
The illumination lamp according to claim 1, wherein the opening region is formed in a band shape toward a longitudinal direction of the cover main body. The diffusion membrane, illumination lamp according to claim 1 or 2, characterized in that together with the diffusion material to the substrate is added in which a cavity is formed. The diffusion membrane, illumination lamp according to claim 1 or 2, characterized in der Rukoto that only the cavity to 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 illumination device comprising:

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