JP2017208205A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device that can acquire uniform light emission by suppressing luminance unevenness and be miniaturized and thinned.SOLUTION: A lighting device includes: a plurality of light-emitting devices 12; a plurality of light diffusion structures 21 formed so as to corresponding one by one to each of the plurality of light-emitting devices 12 and diffusing light emitted from each of the plurality of light-emitting devices 12; and a cover member 30 disposed so as to cover the plurality of light-emitting devices 12 and having light transmissivity and light diffusing property. Each of the plurality of light-emitting devices 12 is disposed so as to be oriented to each of the plurality of light diffusion structures 21.SELECTED DRAWING: Figure 3B

Description

  The present invention relates to an illuminating device, and more particularly, to an illuminating device using a light emitting diode (LED) as a light source.

  Solid light-emitting elements such as LEDs are widely used in various devices such as lighting devices and displays as high-efficiency and space-saving light sources. In lighting applications, LEDs are used for various lighting fixtures such as ceiling lights and downlights installed on construction materials such as ceilings and walls, or various lamps such as bulb lamps and straight tube lamps as the light source of lighting fixtures. It has been.

  For example, Patent Document 1 discloses a long shape including an LED lighting unit including a long substrate in which a plurality of LEDs are linearly arranged, and a lighting fixture outer shell to which the LED lighting unit is detachably attached. A lighting fixture is disclosed.

JP 2005-302484 A JP 2009-259545 A

  In an illuminating device using a plurality of light emitting elements, a light crushing feeling (bright spot) is conspicuous at the time of lighting, and luminance unevenness occurs. In particular, since the LED is a point light source with strong directivity, luminance unevenness is conspicuous in an illumination apparatus using a plurality of LEDs as light emitting elements. Further, even in a long illuminating device in which a plurality of light emitting elements are linearly arranged, luminance unevenness is more conspicuous than in an illuminating device in which a plurality of light emitting elements are arranged in a matrix.

  As described above, in a lighting device using a plurality of light emitting elements, luminance unevenness occurs and it is difficult to obtain uniform light emission.

  In view of this, a long illuminating device is proposed in which the light emitted from the LED is diffusely reflected once by the diffuse reflection surface provided inside the housing and then taken out to obtain uniform and uniform linear light emission. (Patent Document 2).

  However, in order to achieve uniform light emission in the illumination device disclosed in Patent Document 2, it is necessary to secure an internal space region of a predetermined size for diffusing light. For this reason, in the structure of the illuminating device disclosed in Patent Document 2, there is a limit to downsizing and thinning the entire device.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an illumination device that can obtain uniform light emission while suppressing unevenness in luminance, and that can be reduced in size and thickness. And

  In order to achieve the above object, one embodiment of a lighting device according to the present invention includes a plurality of light emitting elements and a one-to-one correspondence with each of the plurality of light emitting elements. A plurality of light diffusing structures for diffusing emitted light; and a cover member that is disposed so as to cover the plurality of light emitting elements and has translucency and light diffusibility, each of the plurality of light emitting elements, It arrange | positions toward each of the said several light-diffusion structure.

  According to the present invention, it is possible to achieve a lighting device that can suppress uneven brightness and obtain uniform light emission, and can be reduced in size and thickness.

It is a perspective view which shows the external appearance of the illuminating device which concerns on embodiment. It is sectional drawing which shows typically the internal structure of the illuminating device which concerns on embodiment. It is sectional drawing of the illuminating device which concerns on embodiment in the IIB-IIB line | wire of FIG. 2A. It is a principal part expanded sectional view for demonstrating the optical effect | action of the illuminating device which concerns on embodiment. It is sectional drawing for demonstrating the optical effect | action of the illuminating device which concerns on embodiment. It is sectional drawing which shows typically the internal structure of the illuminating device which concerns on a modification. It is sectional drawing of the illuminating device which concerns on the modification in the IVB-IVB line | wire of FIG. 4A.

  Embodiments of the present invention will be described below. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily shown strictly. Therefore, for example, the scales and the like do not necessarily match in each drawing. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

  In the present specification and drawings, an X axis, a Y axis, and a Z axis represent three axes of a three-dimensional orthogonal coordinate system. The X axis and the Y axis are orthogonal to each other and both are orthogonal to the Z axis.

(Embodiment)
[Configuration of lighting device]
The structure of the illuminating device 1 which concerns on embodiment is demonstrated using FIG.1, FIG.2A and FIG.2B. FIG. 1 is a perspective view illustrating an appearance of a lighting device 1 according to an embodiment. 2A is a cross-sectional view (cross-sectional view in the XY plane) schematically showing the internal structure of the illuminating device 1, and FIG. 2B is a cross-sectional view (YZ plane) of the illuminating device 1 taken along the line IIB-IIB in FIG. 2A. FIG.

  As shown in FIGS. 1, 2A, and 2B, the lighting device 1 includes a light emitting module 10 having a plurality of light emitting elements 12, a reflecting member 20 having a plurality of light diffusion structures 21, and a plurality of light emitting elements 12. The cover member 30 to cover, the base 40, and the end cover 50 are provided.

  Illumination device 1 in the present embodiment is a long luminaire, for example, a construction material such as a wall or a ceiling of a building such as a house or a facility, or a housing facility such as a kitchen or a washbasin. Installed at the installation location.

  The light emitting module 10 is a light source module of the lighting device 1 and emits light of a predetermined color. For example, the light emitting module 10 emits white light, but is not limited thereto. In the present embodiment, the light emitting module 10 has a long shape. Moreover, the light-emitting module 10 built in the illuminating device 1 may be either one or a plurality.

  As shown in FIGS. 2A and 2B, the light emitting module 10 includes a substrate 11 and a plurality of light emitting elements 12 arranged on the substrate 11.

  The substrate 11 is a mounting substrate for mounting the light emitting element 12. Examples of the substrate 11 include a resin substrate based on a resin base material such as a glass epoxy base material, a metal base substrate coated with an insulating base using a metal, or a ceramic that is a sintered body of a ceramic material such as aluminum oxide. A substrate or the like can be used.

  In the present embodiment, the substrate 11 is a long rectangular substrate, but the shape of the substrate 11 is not limited to this. Moreover, although the board | substrate 11 is a rigid board | substrate, it is not restricted to this, The flexible board | substrate which has flexibility may be sufficient.

  Although not shown, the substrate 11 is provided with a metal wiring for supplying DC power to the light emitting element 12 and a connection terminal for receiving power for causing the light emitting element 12 to emit light from the outside. . The metal wiring is formed on one surface of the substrate 11 in a predetermined pattern.

  Each of the plurality of light emitting elements 12 is, for example, an LED light source. As an example, each light emitting element 12 is an individually packaged surface mount device (SMD) type LED element. As shown in FIG. 2B, a white resin package 12a having a recess and a package are provided. The LED chip 12b (bare chip) is primarily mounted on the bottom surface of the recess of 12a, and a sealing member 12c enclosed in the recess of the package 12a. The sealing member 12c is made of a translucent resin material such as silicone resin. The sealing member 12c is a phosphor-containing resin containing a wavelength conversion material such as a phosphor. In the present embodiment, each light-emitting element 12 is a white light source of BY type, and a blue LED chip that emits blue light is used as the LED chip 12b, and YAG is used as a phosphor dispersed in the sealing member 12c. A yellow phosphor such as is used.

  The plurality of light emitting elements 12 are arranged on one surface (front surface) of the substrate 11. Specifically, the plurality of light emitting elements 12 are mounted in a straight line along the longitudinal direction (X-axis direction) of the substrate 11. In addition, although the several light emitting element 12 is arrange | positioned at equal intervals, it does not restrict to this.

  Each of the plurality of light emitting elements 12 is disposed toward each of the plurality of light diffusion structures 21. The plurality of light emitting elements 12 and the plurality of light diffusion structures 21 correspond one to one. That is, one light diffusion structure 21 is formed corresponding to one light emitting element 12. Specifically, the plurality of light diffusion structures 21 are arranged in a line along the same direction as the arrangement direction of the plurality of light emitting elements 12, and an interval (pitch) between two adjacent light diffusion structures 21 is defined. The interval (pitch) between two adjacent light emitting elements 12 is the same. Note that the number of the light diffusion structures 21 and the number of the light emitting elements 12 is the same, but the present invention is not limited to this.

  As described above, the plurality of light emitting elements 12 and the plurality of light diffusion structures 21 are arranged in a straight line so as to be arranged in parallel. The plurality of light emitting elements 12 and the plurality of light diffusion structures 21 are arranged along the longitudinal direction (X-axis direction) of the cover member 30.

  In the present embodiment, each light diffusion structure 21 is formed so as to overlap the optical axis of each corresponding light emitting element 12. Therefore, the light diffusing structure 21 is formed so as to be located on the extension in the center direction of the light distribution angle of the light emitting element 12. As an example, the optical axis direction of each light emitting element 12 is a direction parallel to the Y axis.

  Each of the plurality of light diffusion structures 21 diffuses light emitted from each of the plurality of light emitting elements 12. Specifically, light emitted from one light emitting element 12 is diffused by being scattered in the light diffusion structure 21 formed facing the light emitting element 12.

  In the present embodiment, each of the plurality of light diffusion structures 21 diffuses the light emitted from each of the plurality of light emitting elements 12 by reflection. Specifically, light emitted from one light emitting element 12 strikes the surface of the light diffusing structure 21 formed so as to face the light emitting element 12 and diffuses by scattering.

  The shape of the light diffusion structure 21 may be a shape that uniformly diffuses light from the light emitting element 12 in all directions. For example, as shown in FIGS. 2A and 2B, each light diffusing structure 21 is hemispherical and the surface shape is spherical, so that the light emitted from the light emitting element 12 is reflected by the light diffusing structure 21 and is totally reflected. It can be diffused to travel in the direction.

  The light diffusion structure 21 is made of, for example, a resin material in which a light diffusion material such as metal fine particles is dispersed. As an example, the light diffusion structure 21 is a white resin in which white light diffusion fine particles (white fine particles) are dispersed as a light diffusion material in a resin material such as polycarbonate or acrylic. The light diffusion structure 21 is not limited to a resin material, and may be formed of a metal body having a light reflection film such as a white coating film formed on the surface.

  The light diffusing structure 21 is not limited to the configuration in which the light of the light emitting element 12 is totally reflected on the surface, and may be configured such that the light of the light emitting element 12 is incident on and scattered. That is, the light diffusing structure 21 may have translucency as long as it has a structure that diffuses light.

  The light diffusion structure 21 is provided on the reflection member 20. In the present embodiment, the plurality of light diffusion structures 21 and the reflection member 20 are integrated, and the light diffusion structure 21 is a part of the reflection member 20. Therefore, the reflecting member 20 is configured using the same material as the light diffusing structure 21. In this case, the reflecting member 20 and the light diffusing structure 21 can be manufactured by, for example, integral molding using a white resin. The reflection member 20 produced in this way has light reflectivity like the light diffusion structure 21 and reflects the light of the light emitting element 12.

  The reflecting member 20 has an inclined surface 20 a that is inclined toward the plurality of light emitting elements 12. Specifically, the reflection member 20 is a reflector having a shape in which a plurality of hemispherical light diffusion structures 21 are provided on the surface of the substantially triangular prism body on the cover member 30 side, and the reflection member 20 is on the cover member 30 side. The inclined surface 20 a is inclined toward the plurality of light emitting elements 12. The inclined surface 20 a is inclined at a predetermined angle with respect to the bottom surface of the bottom 41 of the base 40. In the present embodiment, the inclined surface 20a is a light reflecting surface.

  The cover member 30 has translucency and light diffusibility (light scattering). Light from the light emitting element 12 diffused by the light diffusion structure 21 is incident on the cover member 30. Further, the light from the light emitting element 12 and the direct light from the light emitting element 12 reflected by the inclined surface 20 a of the reflecting member 20 are also incident on the cover member 30. The light incident on the cover member 30 passes through the cover member 30 and is emitted to the outside. At this time, the light incident on the cover member 30 is diffused (scattered) and emitted to the outside.

  The cover member 30 is made of a translucent material such as a translucent resin material such as polycarbonate or acrylic, or a glass material.

  The light diffusibility of the cover member 30 is, for example, milky white light in which a light diffusing material such as light reflecting fine particles is dispersed in a translucent resin material or the surface (inner surface or outer surface) of the cover member 30 includes a light diffusing material or the like. It can be provided by forming a diffusion film. Further, the cover member 30 may be formed by applying a graining process or the like to the surface of the cover member 30 without using a light diffusing material, or by printing a dot pattern on the surface of the cover member 30. 30 can have light diffusibility.

  The cover member 30 configured as described above is disposed so as to cover the plurality of light emitting elements 12 (light emitting modules 10). In the present embodiment, the cover member 30 is disposed so as to cover not only the light emitting element 12 but also the reflecting member 20. In the present embodiment, the cover member 30 is elongated, and the longitudinal direction of the cover member 30 is the same as the arrangement direction of the plurality of light emitting elements 12. Moreover, as shown in FIG. 2B, the cross-sectional shape of the cover member 30 is, for example, a U shape, but may be a semicircular arc shape, a U shape, or a linear shape.

  The cover member 30 is fixed to the base 40. Specifically, as shown in FIG. 2B, both end portions in the YZ cross section of the cover member 30 are fixed to the first side wall portion 42 and the second side wall portion 43 of the base 40. The cover member 30 and the base 40 are fixed by a locking structure such as an adhesive or snap-in, or by screwing.

  Note that the length of the pair of side walls that are curved from the upper part of the cover member 30 in the YZ section may be determined according to the light distribution of the lighting device 1 and may be different as shown in FIG. 2B. And may be the same. Further, the cover member 30 may be configured to control light distribution of light from the reflecting member 20 (light diffusion structure 21). For example, the cover member 30 may have a condensing or diverging lens function.

  The base 40 is a base member (frame) that supports the light emitting module 10 and the reflecting member 20. As shown in FIG. 2B, the base 40 has a bottom 41, a first side wall 42, and a second side wall 43. The base 40 is made of, for example, sheet metal, and is formed into a predetermined shape by subjecting a sheet metal (metal plate) made of SPCC (Steel Plate Cold Commercial) to roll forming or pressing. . Specifically, the base 40 has a bottom 41, a first side wall 42, and a second side wall 43 having a U-shaped cross section. In the present embodiment, the height of the first side wall portion 42 is higher than the height of the second side wall portion 43, but the present invention is not limited to this.

  The light emitting module 10 is fixed to the base 40. Specifically, the light emitting module 10 is fixed to the first side wall portion 42 of the base 40. In this case, the light emitting module 10 is mounted on the base 40 so that the other surface (back surface) of the substrate 11 is in contact with the inner surface of the first sidewall portion 42, and the substrate 11 is fixed to the first sidewall portion 42. Thus, the light emitting module 10 can be held on the base 40 with the light emitting element 12 facing the light diffusion structure 21.

  Further, the reflecting member 20 is fixed to the base 40. Specifically, the reflecting member 20 is in a state where the bottom surface of the reflecting member 20 is in contact with the inner surface of the bottom portion 41 of the base 40 and the side surface of the reflecting member 20 is in contact with the inner surface of the second side wall portion 43 of the base 40. It is fixed to the base 40.

  The light emitting module 10 and the base 40 and the reflecting member 20 and the base 40 can be fixed by a locking structure such as an adhesive or snap-in or by screwing.

  In the present embodiment, the cover member 30 and the base 40 constitute a casing, and the light emitting module 10 and the reflecting member 20 are accommodated in the casing constituted by the cover member 30 and the base 40. Yes. As shown in FIG. 2A, the length in the longitudinal direction of the cover member 30 and the length in the longitudinal direction of the base 40 are substantially the same.

  The end cover 50 is an end cap that covers both ends of the cover member 30 and the base 40 in the longitudinal direction. That is, the two end covers 50 are attached to one end and the other end in the longitudinal direction of the cover member 30 and the base 40.

  The end cover 50 is fixed to the cover member 30 and the base 40 by, for example, a locking structure such as an adhesive or snap-in or screwing. The end cover 50 is a resin molded product made of a resin material such as PBT (polybutylene terephthalate), but may be made of a metal material.

  When installing the illuminating device 1 configured as described above on an installation surface such as a construction material, it is preferable to arrange the lighting device 1 so that the upper part of the cover member 30 faces the irradiation direction. In this case, for example, the lighting device 1 may be installed in such a posture that the outer surface of the bottom 41 of the base 40 faces the installation surface, or the outer surface of the first side wall 42 of the base 40 faces the installation surface. The lighting device 1 may be installed in such a posture.

  When the lighting device 1 is installed on the installation surface, the base 40 may be brought into contact with the installation surface to fix the base 40 to the installation surface, or a mounting plate is separately fixed to the installation surface. You may install the illuminating device 1 in an installation surface by attaching the base 40 to.

  Moreover, although not shown in figure, the illuminating device 1 is connected with the power supply unit via the power wire. The power supply unit is a power supply device that generates power for causing the plurality of light emitting elements 12 to emit light, and includes a power supply circuit that converts commercial AC power into DC power of a predetermined level by rectification, smoothing, step-down, and the like. The power supply unit includes, for example, a circuit board and a plurality of circuit components (electronic components) mounted on the circuit board. The circuit board is a printed circuit board (PCB) on which metal wiring such as copper foil is patterned. The plurality of circuit components include, for example, capacitance elements such as electrolytic capacitors and ceramic capacitors, resistance elements such as resistors, rectifier circuit elements, coil elements, choke coils (choke transformers), noise filters, diodes, and integrated circuit elements. Elements and the like. The DC power generated by the power supply unit is supplied to the light emitting module 10 via the power supply line. Thereby, the light emitting module 10 (light emitting element 12) emits light.

[Optical action of lighting equipment, etc.]
Next, the effect including the optical action of the illumination device 1 in the present embodiment will be described with reference to FIGS. 3A and 3B. FIG. 3A is an enlarged cross-sectional view of a main part (a cross-sectional view in the XY plane) for explaining the optical action of the illumination device 1. FIG. 3B is a cross-sectional view (cross-sectional view in the YZ plane) for explaining the optical action of the illumination device 1.

  As shown in FIGS. 3A and 3B, each light emitting element 12 has a one-to-one correspondence with the light diffusing structure 21 and is disposed toward the light diffusing structure 21.

  Thereby, the light emitted from the light emitting element 12 is diffused in the corresponding light diffusion structure 21. In the present embodiment, the light emitted from the light emitting element 12 is diffused by reflection in the light diffusion structure 21. At this time, the light diffusing structure 21 is not limited to the light emitted from the one light emitting element 12 facing the light diffusing structure 21, but the light emitting elements 12 other than the one light emitting element 12 (for example, one light emitting element 12). The light emitted from the light emitting elements 12) located on both sides of the light may be diffused.

  The light reflected by the light diffusion structure 21 passes through the cover member 30 and is emitted to the outside of the cover member 30. At this time, as shown in FIG. 3B, the light reflected by the light diffusion structure 21 is diffused and emitted to the outside when passing through the cover member 30.

  Thus, the light emitted from the light emitting element 12 is diffused by the light diffusion structure 21 and also diffused by the cover member 30. That is, the light emitted from the light emitting element 12 is diffused twice by the light diffusion structure 21 and the cover member 30 and is emitted to the outside.

  As a result, even when the plurality of light emitting elements 12 are discretely arranged, the light emitted from the light emitting elements 12 is diffused a plurality of times. Point) can be made inconspicuous. As a result, luminance unevenness is suppressed and the uniformity can be improved, so that uniform light emission can be obtained.

  Moreover, according to the illuminating device 1 in this Embodiment, since a big interior space area | region is not required like patent document 2, the size reduction and thickness reduction of the whole apparatus can be implement | achieved easily.

[Summary]
As described above, according to lighting device 1 in the present embodiment, a plurality of light emitting elements 12 are formed in a one-to-one correspondence with each of the plurality of light emitting elements 12, and light emitted from each of the plurality of light emitting elements 12 A plurality of light diffusion structures 21 to be diffused and a cover member 30 disposed so as to cover the plurality of light emitting elements 12 and having translucency and light diffusibility are provided. Each of the plurality of light emitting elements 12 is disposed toward each of the plurality of light diffusion structures 21.

  As a result, it is possible to realize the lighting device 1 that can suppress uneven luminance and obtain uniform light emission, and that can be reduced in size and thickness.

  In the present embodiment, each of the plurality of light diffusion structures 21 diffuses the light emitted from each of the plurality of light emitting elements 12 by reflection.

  Thus, by diffusing the light emitted from the light emitting element 12 by reflection in the light diffusion structure 21, the light can be diffused without lowering the luminous flux. Therefore, uneven brightness can be suppressed and uniform light emission can be obtained with a high luminous flux.

  In the present embodiment, the plurality of light diffusion structures 21 are provided on the reflecting member 20.

  Thereby, since the light from the light emitting element 12 can be reflected also on the surface of the reflecting member 20, the luminance unevenness can be further suppressed and more uniform light emission can be obtained.

  Further, in this case, in the present embodiment, the reflecting member 20 has an inclined surface 20 a that is inclined toward the plurality of light emitting elements 12.

  Thereby, since the light from the light emitting element 12 can be easily reached near the center part of the light diffusion structure 21, the light from the light emitting element 12 can be easily diffused evenly. Moreover, since the inclined surface 20a is directed to the cover member 30, the light from the light emitting element 12 can be reflected by the inclined surface 20a and easily incident on the cover member 30. Therefore, more uniform light emission can be obtained.

  Moreover, in this Embodiment, the some light-diffusion structure 21 and the reflection member 20 are integral.

  Thereby, the several light-diffusion structure 21 and the reflection member 20 can be easily produced by integral molding.

  In the present embodiment, the cover member 30 has a long shape, and the plurality of light emitting elements 12 and the plurality of light diffusion structures 21 are arranged along the longitudinal direction of the cover member 30.

  Thereby, the elongate illuminating device 1 (line-shaped light source) which can obtain uniform light emission linearly is realizable.

(Modification)
As mentioned above, although the illuminating device which concerns on this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment.

  For example, in the above embodiment, the power supply unit that generates electric power for causing the light emitting elements 12 to emit light is separated from the lighting device 1 and separately provided outside the lighting device 1. It may be built in the device 1.

  Specifically, in FIG. 2A and FIG. 2B, the power supply unit can be built in the lighting device 1 by mounting circuit components constituting the power supply circuit on the substrate 11 of the light emitting module 10. In this case, the lighting device 1 is supplied with AC power from a commercial power source.

  Further, when the power supply unit is built in the lighting device, the reflection member 20A may be used as a casing and the power supply unit 60 may be disposed in the internal space of the reflection member 20A as in the lighting device 1A shown in FIGS. 4A and 4B. Good. The power supply unit 60 includes a circuit board 61 and a plurality of circuit components 62 mounted on the circuit board 61.

  4A and 4B, the reflecting member 20A is a reflecting plate, and can be configured by a thin plate, for example. The light diffusing structure 21 can be formed by extruding a part of a thin plate into a hemispherical shape. In this case, the plurality of circuit components constituting the power supply unit 60 may be distributed and arranged at positions corresponding to the plurality of light diffusion structures 21. In addition, a tall circuit component such as an electrolytic capacitor may be disposed in the spatial region of the reflecting member 20A corresponding to the position of the light diffusion structure 21.

  The reflection member 20A can be formed using an insulating resin material such as a white resin as in the above embodiment, but if the edge surface distance from the power supply unit 60 (circuit parts) can be secured, You may form using a metal material. In this case, the reflecting member 20A can be formed using, for example, a metal plate having a light reflecting film such as a white coating film formed on the surface.

  As described above, as shown in FIGS. 4A and 4B, the power supply unit 60 is arranged and hidden in the reflecting member 20 </ b> A, so that the circuit components constituting the power supply circuit are more uniform than the case where the circuit components are mounted on the substrate 11. Light emission can be realized. That is, when the circuit component is mounted on the substrate 11, the light from the light emitting element 11 is blocked by the circuit component and a shadow (non-light emitting portion) is generated, resulting in uneven brightness. However, the power supply unit 60 is housed in the reflecting member 20A. Therefore, it is possible to prevent luminance unevenness due to circuit components. Therefore, it is possible to realize uniform light emission that is uniform and has no non-light emitting portion.

  Further, as shown in FIGS. 4A and 4B, by disposing the circuit components in a distributed manner, a heat generating component (integrated circuit, etc.) and a circuit component with low heat resistance (electrolytic capacitor, etc.) among the plurality of circuit components are provided. Can be released. Thereby, since thermal degradation of a power supply unit can be suppressed, 1 A of highly reliable illuminating devices can be implement | achieved.

  Moreover, in the said embodiment, although the shape of the light-diffusion structure 21 was hemispherical, it is not restricted to this. For example, it may be a polygonal pyramid such as a triangular pyramid or a quadrangular pyramid or a cone.

  Moreover, in the said embodiment, although the light-diffusion structure 21 was made into the shape protruded from the surface of the reflection member 20, it is not restricted to this. For example, the light diffusion structure 21 may be configured by forming minute irregularities on the surface of the reflecting member 20 by, for example, roughening the inclined surface 20a of the reflecting member 20. In this case, a circular or rectangular minute unevenness region may be formed only on the inclined surface 20a only in a portion facing each light emitting element 12, or a minute unevenness may be formed on the entire inclined surface 20a of the reflecting member 20. Good.

  Moreover, in the said embodiment, the illuminating device 1 may have a human sensor or an illuminance sensor for controlling the light emission state of the light emitting module 10.

  Moreover, in the said embodiment, the illuminating device 1 may have a light control function. Furthermore, the illuminating device 1 may have a toning function. In this case, the light emitting module 10 includes, for example, a plurality of light emitting elements 12 having different color temperatures.

  Moreover, in the said embodiment, although the light emitting module 10 was an SMD type LED module using the SMD type LED element as the light emitting element 12, it is not restricted to this. For example, the light emitting module 10 may be a COB (Chip On Board) type LED module in which an LED chip is used as the light emitting element 12. In this case, the light emitting module 10 includes a substrate 11, one or more LED chips (bare chips) directly mounted on the substrate 11, and a sealing member such as a phosphor-containing resin that seals the LED chip. The

  Moreover, in the said embodiment, although the illuminating device 1 was elongate, it is not restricted to this. For example, the lighting device 1 may be circular or square, or may be annular.

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

DESCRIPTION OF SYMBOLS 1 Illuminating device 10 Light emitting module 11 Board | substrate 12 Light emitting element 12a Package 12b LED chip 12c Sealing member 20, 20A Reflective member 20a Inclined surface 21 Light diffusion structure 30 Cover member 40 Base 41 Bottom part 42 1st side wall part 43 2nd side wall 50 End cover 60 Power supply unit

Claims (7)

A plurality of light emitting elements;
A plurality of light diffusing structures that are formed in one-to-one correspondence with each of the plurality of light emitting elements and diffuse light emitted from each of the plurality of light emitting elements;
A cover member disposed so as to cover the plurality of light emitting elements, and having a light transmitting property and a light diffusing property;
Each of the plurality of light emitting elements is disposed toward each of the plurality of light diffusion structures. The lighting device according to claim 1, wherein each of the plurality of light diffusion structures diffuses light emitted from each of the plurality of light emitting elements by reflection. The lighting device according to claim 2, further comprising a reflecting member provided with the plurality of light diffusion structures. The lighting device according to claim 3, wherein the reflection member has an inclined surface inclined toward the plurality of light emitting elements. The reflective member is a housing,
The lighting device according to claim 3, wherein a power supply unit that generates electric power for causing the plurality of light emitting elements to emit light is disposed in an internal space of the reflecting member. The lighting device according to claim 3, wherein the plurality of light diffusion structures and the reflection member are integrated. The cover member is elongated,
The lighting device according to claim 1, wherein the plurality of light emitting elements and the plurality of light diffusion structures are arranged along a longitudinal direction of the cover member.

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