JP2014220359A - Light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost light emitting device capable of easily corresponding to various specifications and stable in quality.SOLUTION: A light emitting device 1 includes: a light transmissible transparent body 10; a substrate 13 on which the transparent body 10 is disposed; and a light source body 11 irradiating light on the transparent body 10 and disposed on one surface of the substrate 13. Further, a phosphor 12 allowing light to pass through is arranged between the transparent body 10 and the light source body 11, and a clearance 17 in which air enters is provided between the phosphor 12 and the light source body 11.

Description

  The present invention relates to a light emitting device.

  In recent years, the market for thin displays such as LCD TVs, smartphones, and tablet terminals has been rapidly expanding. Along with this, the backlight light source of these displays is changed from a conventional illumination light source such as a fluorescent lamp to an illumination light source using a white LED (Light Emitting Diode) having characteristics of power saving, high efficiency and long life. It has been replaced.

  Patent Document 1 discloses a light emitting device in which an LED placed on a substrate is sealed in a concave portion of a resin portion with a phosphor. In this light-emitting device, a blue LED that emits blue light and a phosphor that emits yellow light are used in combination to emit white light by mixing blue light from the LED and yellow light from the phosphor.

JP 2006-199755 A (Detailed description of the invention)

  However, in the light-emitting device disclosed in Patent Document 1, it is necessary to cure the phosphor disposed in the resin portion, and thus manufacturing time is required. As a result, the quality tends to become unstable and the manufacturing cost increases. In addition, since the LED is configured to be sealed in the resin portion by the phosphor, it is difficult to change the light emitting device structurally. For this reason, the problem that it cannot respond easily to various specifications, such as concentrating illuminance and illuminating far away, or distributing illuminance evenly, arises.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a low-cost light-emitting device that can easily cope with various specifications, has stable quality. is there.

  In order to solve the above-described problems, one aspect of the present invention provides a transparent body having translucency, a substrate on which the transparent body is disposed, light on the transparent body, and one surface of the substrate. And a light emitting device having a light source body disposed thereon, the fluorescent material is disposed between the transparent body and the light source body or on the opposite side of the light source of the transparent body, and a phosphor that allows light to pass therethrough is installed. A gap for air to enter is provided between the phosphor and the light source body.

  In addition, the transparent body is a solid body with a solid interior, and a recess is provided in the transparent body, and the end of the recess is disposed on the substrate so as to cover the light source body, and the gap is set to 0. It is preferable to be within a range of 1 to 5 mm.

  Further, the transparent body has a polygonal cross-sectional shape, and an inclination angle between one side surface forming the polygonal cross-sectional shape and another side surface adjacent to the one side surface is 20 ° or more 45. It is preferable to make it into the range below.

  Further, it is preferable that the light source body is an LED that emits blue light, the phosphor is a yellow phosphor film, and the phosphor film is attached to a surface of the translucent body facing the light source body.

  According to the present invention, it is possible to provide a light-emitting device that can easily cope with various specifications, has a stable quality, and is low in cost.

1 is a side cross-sectional view of a light emitting device according to a first embodiment of the present invention. It is the top view which looked at the light-emitting device in FIG. 1 from the front side. It is a sectional side view of the light-emitting device which concerns on the 2nd Embodiment of this invention. It is the top view which looked at the light-emitting device in FIG. 3 from the front side. It is a figure showing the illumination intensity of the light irradiated from the light-emitting device when the inclination | tilt angle in FIG. 3 is 42.5 degrees. It is a figure showing the illumination intensity of the light irradiated from the light-emitting device when the inclination | tilt angle in FIG. 3 is 22.5 degrees. It is a perspective view of the light-emitting device which concerns on the 3rd Embodiment of this invention. It is a sectional side view of the light-emitting device which concerns on the 4th Embodiment of this invention. It is a sectional side view of the light source body of the light-emitting device which concerns on the 5th Embodiment of this invention. It is the top view which looked at the light source used for the light-emitting device in FIG. 9 from the front side. It is the top view which looked at the light-emitting device which concerns on the 5th Embodiment of this invention from the front side. It is sectional drawing which cut | disconnected the light-emitting device in FIG. 11 by the AA line. It is the top view which looked at the light-emitting device which concerns on the 6th Embodiment of this invention from the front side. It is sectional drawing which cut | disconnected the light-emitting device in FIG. 13 by the BB line. It is a figure which shows the modification of the light-emitting device which concerns on the 4th Embodiment of this invention.

(First embodiment)
Hereinafter, a light-emitting device 1 according to a first embodiment of the present invention will be described with reference to the drawings. In the following description, FIGS. 1, 3, 7-9, 12, the arrow _{X 1} direction shown in FIGS. 14 and 15 respectively define a back table and arrow _{X 2} direction.

  FIG. 1 is a side sectional view of a light emitting device 1 according to a first embodiment of the present invention. FIG. 2 is a plan view of the light emitting device 1 according to the first embodiment of the present invention as viewed from the front side.

  As shown in FIG. 1 and FIG. 2, the light emitting device 1 includes a transparent body 10 that has translucency and has a solid interior, a light source body 11 that emits light to the transparent body 10, and a transparent body. 10, the fluorescent substance 12 arrange | positioned in the surface facing the light source body 11, and the board | substrate 13 in which this light source body 11 and a circuit are installed. The light emitting device 1 is a device for diffusing and irradiating light within a certain range, and can be applied to, for example, a lighting fixture installed on a ceiling to illuminate an indoor area. In the light emitting device 1, a light source body 11 that emits blue light and a phosphor 12 that emits yellow light are combined to emit white light.

  The light source body 11 is disposed on the surface (the side on which the transparent body 10 is mounted) which is one surface of the substrate 13. A wiring pattern (not shown) for electrical connection with the light source body 11 is provided around the light source body 11 on the substrate 13. The substrate 13 may be a mounting substrate having a heat dissipation function. Specifically, the light source body 11 is directly mounted on the substrate 13 in the form of a chip on board (COB). The light source body 11 may be connected to the substrate 13 in the form of a bonding wire. In the present embodiment, a chip-type LED (Light Emitting Diode) that emits blue light is employed as the light source body 11. However, as the light source 11, an LED that emits other types of light such as red light, green light, or ultraviolet light, or another form of LED may be employed, or light emission other than LEDs such as an organic EL light emitting element. An element may be adopted.

  As shown in FIG. 1, the transparent body 10 is arranged on one surface of the substrate 13 so as to cover the outside of the light source body 11. The transparent body 10 can be mounted on the substrate 13 using a support means (not shown), for example. As shown in FIG. 1 and FIG. 2, the transparent body 10 has a substantially hemispherical cross section, and a cylindrical recess 14 that is recessed toward the front side is formed on the back side. That is, the transparent body 10 has a dome shape having a curved surface.

  The recess 14 has a substantially inverted U-shaped cross section and is formed in a substantially circular shape in plan view. The bottom surface 15 of the recess 14 forms a surface facing the light source body 11. In a state where the transparent body 10 is disposed on the substrate 13, the light source body 11 is covered by the recess 14. At this time, as shown in FIG. 1, the ring-shaped opening end portion 16 serving as the end portion of the recess 14 comes into contact with the substrate 13. For this reason, the light emitted from the light source body 11 does not leak from between the substrate 13 and the transparent body 10.

  The transparent body 10 is not a space but a solid body, and is made of a colorless and translucent material such as an acrylic resin. In the present embodiment, the transparent body 10 is formed by injection molding, and the formation of the transparent body 10 can be stabilized by the injection molding. The transparent body 10 may be formed by a molding method other than injection molding.

  Further, as shown in FIG. 1, the phosphor 12 is attached to the bottom surface 15 of the recess 14 provided in the transparent body 10. As shown in FIG. 1, the phosphor 12 is attached to the light source body 11 with a gap 17 therebetween. For this reason, an air layer is formed between the light source body 11 and the phosphor 12 in a state where the transparent body 10 is disposed on the substrate 13. The gap length d of the gap 17 is preferably in the range of 0.1 mm to 5.0 mm. However, it may be less than 0.1 mm or greater than 5.0 mm. In the present embodiment, the phosphor 12 is formed as a circular yellow phosphor film. The size of this circular shape is such that it fits within the bottom surface 15 of the recess 14. A yellow light-emitting phosphor that emits yellow light is employed as the phosphor 12.

  The phosphor 12 is formed as a phosphor film that can be attached. Thus, since the fluorescent substance 12 can be stuck and fixed, it can be easily attached to the back side of the bottom surface 15. The shape of the phosphor 12 is not limited to a circular shape, and may be other shapes such as a quadrangle. Moreover, the attachment method of the fluorescent substance 12 is not limited to attachment, You may make it install by other methods, such as apply | coating a fluorescent paint.

  In addition, as the phosphor 12, a preferable one can be adopted as appropriate depending on the white light emission method in the light emitting device 1. For example, when the blue excitation method is employed, green or red light emitting phosphors are employed instead of yellow light emitting phosphors according to the light emitted from the light source body 11 and the required color rendering properties. Alternatively, a light emitting phosphor such as green or red may be used in addition to the yellow light emitting phosphor. Further, when the three-wavelength method is adopted, in order to obtain white light by mixing light of three colors of red, green, and blue, as the phosphor 12, a red light-emitting phosphor, a green light-emitting phosphor, and a blue light-emitting phosphor These three types of phosphors may be used in combination.

  Further, the phosphor 12 can be a mixture of a fluorescent material and a silicone resin or an epoxy resin. Furthermore, the thing of the various types applied to white LED can be employ | adopted for the kind of fluorescent substance 12. FIG. For example, a silicate phosphor represented by TEOS (Toshiba Material Europium Activated Ortho Silicate) phosphor can be adopted as the phosphor 12. The TEOS phosphor emits light with excitation light in the ultraviolet to blue region, and has high luminous efficiency even under conditions of high temperature and high humidity. Further, as the phosphor 12, a sialon phosphor developed by the National Institute for Materials Science (NIMS) or a nitride phosphor represented by Sr sialon phosphor can be employed. The sialon phosphor developed by NIMS has a feature that it can be excited at a longer wavelength than existing phosphors, and emits pseudo white light using a blue LED and an asylon phosphor film that emits yellow light. By using a sialon phosphor film that emits green and red light, light such as yellow, green, and red can be efficiently emitted. The Sr sialon phosphor has a unique crystal structure and emits light with high efficiency by excitation light in the ultraviolet to blue region. In addition, since the peak wavelengths of the red phosphor and the green phosphor can be changed in a predetermined region, the degree of freedom in LED design is increased, and the emission wavelength can be selected according to the application. Further, a near ultraviolet excitation phosphor can be adopted as the phosphor 12. A near-ultraviolet excitation phosphor can obtain a white light source with high color rendering properties by combining phosphors that emit blue, green, and red light.

  In the light emitting device 1, the gap length d between the light source body 11 and the phosphor 12, the width W of the light source body 11 shown in FIG. 1, the curvature of the surface e in the cross section of the transparent body 10 shown in FIG. By changing the size, the intensity and irradiation range of the light emitted from the light emitting device 1 can be adjusted. Here, the transparent body 10 is manufactured using a mold, and the light source body 11 is also produced based on the standard. In addition, the power supply is often constant according to the regulations of the country where it is used. For this reason, it is not so easy to change the width dimension W of the light source body 11, the curvature of the surface e, and the power source of the light source body 11. On the other hand, the gap length d can be easily adjusted by interposing another substrate between the light emitter 11 and the substrate 13, or by thickening the phosphor 12 or attaching it twice. Therefore, by adjusting the gap length d in accordance with the specifications of the light emitting device 1, it is possible to easily adjust the light intensity and irradiation range of the light emitting device 1.

  Next, the operation of the light emitting device 1 will be described. A light-emitting panel having one or a plurality of light-emitting devices 1 is attached to a lighting fixture (not shown) so that the transparent body 10 faces the irradiation side. This luminaire can be installed in an arbitrary position such as indoors. When a switch (not shown) is turned on and electricity is supplied from the power source to the light source body 11 provided on the front side of the substrate 13, the light source body 11 is turned on, and blue light is emitted from the light source body 11 toward the transparent body 10. The The blue light emitted from the light source body 11 enters the phosphor 12 through the gap 17 serving as an air layer. A part of the blue light emitted from the light source body 11 is directed to the side surface side rather than the bottom surface 15 side of the recess 14, but the ratio is very small, and most of the emitted light is directed to the phosphor 12 side. Become. The light traveling toward the bottom surface 15 of the recess 14 is incident on the transparent body 10 and then reflected by the surface e near the opening end 16 and travels in the front direction.

  Part of the blue light incident on the phosphor 12 is absorbed by the phosphor 12 and emits yellow light. And the mixed light of the blue light radiated | emitted from the light source body 11 and not absorbed by the fluorescent substance 12, and the yellow light radiated | emitted from the fluorescent substance 12 passes the transparent body 10, and is radiated | emitted outside as white light. Specifically, the mixed light incident on the transparent body 10 is refracted and reflected by the portion of the surface e of the substantially hemispherical transparent body 10 and finally emitted outward. By mixing blue light and yellow light in this way, it is recognized as white light by human eyes. In addition, it is more preferable that the wavelength of blue light passing through the phosphor 12 made of a yellow light emitting phosphor is in the range of 350 to 460 nm. When the phosphor 12 is a combination of three types of phosphors, a red light emitting phosphor, a green light emitting phosphor and a blue light emitting phosphor, the wavelength of blue light emitted from the light source body 11 is, for example, It can be 365 nm. Furthermore, the wavelength of light emitted from the light source body 11 is not limited to blue light, and may be in the range of 420 to 440 nm or 450 to 455 nm, for example, or 460 nm. Also, most of the mixed light is refracted toward the front side (upper side in FIG. 1) at the surface e, and is emitted to the outside in that state. For this reason, it becomes possible to radiate | emit the light of higher illumination intensity toward the front side which is an irradiation side. That is, the transparent body 10 acts as a convex lens.

  In the light emitting device 1 configured as described above, since the phosphor 12 is formed as a phosphor film that can be attached, the phosphor 12 can be easily attached to the transparent body 10. Further, when the phosphor 12 is arranged in a coating form, the phosphor 12 can be easily installed on the transparent body 10. Therefore, since it is not necessary to cure like a conventional phosphor, the volume can be prevented from shrinking, the manufacturing process can be simplified, and the manufacturing time can be shortened. As a result, the quality of the light emitting device 1 is stabilized and the cost can be reduced.

  Further, in the light emitting device 1, the size of the gap length d of the gap 17 can be easily changed. For this reason, by adjusting the size of the gap 17, it is possible to easily cope with various specifications such as when it is desired to concentrate illuminance and illuminate far away, or when it is desired to illuminate evenly by distributing illuminance. Further, if the size of the gap 17 is in the range of 0.1 mm or more and 5.0 mm or less, it is possible to cope with various specifications without significantly changing the arrangement configuration of the apparatus. Further, by changing the gap length d, the curvature of the surface e of the transparent body 10, the width dimension W of the light source body 11, and the size of the power source of the light source body 11, it becomes possible to meet various specifications.

  In the light emitting device 1, the light source body 11 arranged on the substrate 13 is covered with the transparent body 10. For this reason, the light emitting device 11 can be easily assembled, the manufacturing process can be simplified, and the manufacturing time can be shortened. In addition, since the manufacturing process can be simplified, initial capital investment can be suppressed. Further, the transparent body 10 is not exposed to the external environment, and the target color, in this example, white light can be stably emitted.

  Moreover, in the light-emitting device 1, it is set as the structure which affixes the fluorescent substance 12 on the transparent body 10 as a fluorescent film. For this reason, it becomes easy to attach the phosphor 12 to the transparent body 10, and the assembly of the light emitting device 1 becomes very easy. In addition, since the mixing / stirring step is not required compared to the case of curing the phosphor, variation in chromaticity of the phosphor can be suppressed. As a result, the color of the light can be made uniform, and the unevenness of the color temperature can be reduced.

(Second Embodiment)
Next, a light emitting device 20 according to a second embodiment of the present invention will be described. In the description, portions common to the light emitting device 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 3 is a side sectional view of the light emitting device 20 according to the second embodiment of the present invention. FIG. 4 is a plan view of the light emitting device 20 according to the second embodiment of the present invention as viewed from the front side.

  As shown in FIG. 3 and FIG. 4, the light emitting device 20 includes a transparent body 21 having translucency and a solid interior, a light source body 11 for irradiating the transparent body 21 with light, and a transparent body. 21 includes a phosphor 12 installed on a surface facing the light source body 11 and a substrate 13 on which the light source body 11 is installed. The light emitting device 20 according to the second embodiment is different from the light emitting device 1 according to the first embodiment in the configuration of the transparent body.

  As shown in FIGS. 3 and 4, the transparent body 21 has a substantially dome shape so as to cover the light source body 11. The cross-sectional shape of the transparent body 21 has a substantially polygonal shape formed by a plurality of side surfaces 22. A cylindrical recess 23 that is recessed toward the front side is formed on the back side of the transparent body 21. The recess 23 has a substantially inverted U-shaped cross-section and is formed in a substantially circular shape in plan view. The bottom surface 24 of the recess 23 forms a surface facing the light source body 11. In a state where the transparent body 21 is disposed on the substrate 13, the light source body 11 is covered by the recess 23. At this time, as shown in FIG. 3, the opening end portion 26 serving as the end portion of the recess 23 comes into contact with the substrate 13.

  As shown in FIG. 3, the phosphor 12 is attached to the bottom surface 24 of the recess 23 provided in the transparent body 21. As shown in FIG. 3, the phosphor 12 is attached to the light source body 11 with a gap 25 therebetween. The gap length f of the gap 25 is preferably in the range of 0.1 mm to 5.0 mm. The gap length f is preferably 0.2 to 2 times the cross-sectional length of one side surface 22. However, the gap length f may be less than 0.1 mm or more than 5.0 mm.

  As shown in FIG. 3, the inclination angle θ between one side surface 22 forming a polygonal cross section in the transparent body 21 and the other side surface 22 adjacent to the one side surface 22 is 20 ° or more and 45 ° or less. It is considered as a range. In the present embodiment, as shown in FIG. 3, the transparent body 21 has ten side surfaces 22. In addition, if the magnitude | size of inclination-angle (theta) changes, the width dimension and number of the side surface 22 will also change with the change. Here, when the inclination angle θ is less than 20 °, the light incident on the transparent body 21 from the light source body 11 is easily totally reflected on the side surface 22, and the light from the light source body 11 is directed forward from the transparent body 21. The rate of radiation is reduced. For this reason, the amount of light in the front (in the direction of the central axis L) is reduced in the transparent body having a circular cross section.

  On the other hand, when the inclination angle θ is larger than 45 °, the light incident on the transparent body 21 from the light source body 11 is easily refracted outward in the circumferential direction on the side surface 22, and the light is circumferentially outward, that is, It becomes easy to diffuse toward the left-right direction in FIG. For this reason, by setting the inclination angle θ in the range of 20 ° to 45 °, the light incident on the transparent body 21 is refracted toward the front side by the side surface 22 and the light is directed from the transparent body 21 in the front direction. Can be diffused. As a result, it becomes possible to diffuse and radiate light toward the front direction efficiently. That is, the light emitted from the transparent body 21 has a higher rate in the upward direction in FIG. 3, and the rate in the left-right direction is very low. This is a state in which the light is efficiently diffused.

  In the above-described efficiently diffusing state, a large amount of light gathers in the range of 40 degrees to 140 degrees in terms of the angle θ1 in FIG. In such a case, when the inclination angle θ is in the range of 35 ° to 45 °, the light emitted forward from the transparent body 21 has an angle θ1 in the range of 40 ° to 140 °. Then, there is not much change in strength, and it is evenly distributed toward the front side. On the other hand, when the inclination angle θ is in the range of 20 ° to 30 °, the light radiated forward from the transparent body 21 is concentrated on the central axis L side. Such a change depends on the gap length f and the width dimension W of the light source body 11, but generally the radiated light is dispersed at an inclination angle θ of 30 ° or more, particularly 35 ° or more, and 35 ° or less. In particular, the emitted light is concentrated below 30 °.

  As described above, when the inclination angle θ is in the range of 35 ° to 45 °, the illuminance can be dispersed and the front can be illuminated evenly. Accordingly, when the light emitting device 20 is applied to a general lighting fixture, the inclination angle θ is preferably in the range of 35 ° to 45 °. On the other hand, by setting the inclination angle θ in the range of 20 ° or more and 30 ° or less, the illuminance can be concentrated on the central axis L side to illuminate far away. Accordingly, when the light emitting device 20 is applied to a projector or the like in order to irradiate far away, the inclination angle θ is preferably in the range of 20 ° to 30 °.

  FIG. 5 is a diagram showing the relationship between the angle θ1 in FIG. 3 and the illuminance of light emitted from the light emitting device 20 when the inclination angle θ in FIG. 3 is 42.5 °. 6 is a diagram showing the relationship between the angle θ1 in FIG. 3 and the illuminance of light emitted from the light emitting device 20 when the inclination angle θ in FIG. 3 is 22.5 °. Here, the angle θ1 refers to an angle formed in the clockwise direction with respect to the surface of the substrate 13 around the point J where the surface of the light source body 11 and the central axis L intersect (see FIG. 3). The point J indicates the position of the LED (center of the light source body 11), and the light emission angle of the LED is in the range of 120 ° from 30 ° to 150 ° in terms of the angle θ1. For this reason, most of the light from the light source 11 enters the phosphor 12. This effect is the same in the light source body 11 shown in FIG. 5 and FIG. 6, the vertical axis indicates the illuminance value converted as a percentage, and the horizontal axis indicates the angle θ1. In addition, the illuminance values in FIGS. 5 and 6 indicate analysis values by a computer, and the illuminance is measured at a position directly above the light emitting device 20.

  As shown in FIG. 5, when the inclination angle θ is 42.5 °, the illuminance is about 100% when the angle θ1 is in the range of about 70.0 to about 110.0 °. Further, the illuminance of 50% or more is shown when the angle θ1 is in the range of about 40.0 to about 140.0 °. On the other hand, as shown in FIG. 6, when the inclination angle θ is 22.5 °, the illuminance is about 100% when the angle θ1 is in the range of about 85.0 to about 95.0 °. Moreover, the illuminance of 50% or more is shown when the angle θ1 is in the range of about 55.0 to 125.0 °. From the above, it can be seen that the light is more widely dispersed when the inclination angle θ is 42.5 ° than when the inclination angle θ is 22.5 °. From these data and other data, as described above, when the tilt angle θ is in the range of 30 ° to 45 °, particularly in the range of 35 ° to 45 °, the illuminance can be dispersed, and the tilt angle θ is 20 It was found that the illuminance can be concentrated on the central axis L side when the angle is in the range of not less than 35 ° and not more than 35 °, particularly not less than 20 ° and not more than 30 °.

  In the light emitting device 20 configured as described above, since the inclination angle θ is in the range of 20 ° or more and 45 ° or less, the incident light is refracted by the side surface 22 and strong from the transparent body 21 toward the front direction. Light can be diffused and emitted efficiently. As a result, it becomes possible to radiate light with high illuminance without unevenness toward the irradiation target.

  Further, in the light emitting device 20, the appearance shape is almost changed by changing the number of the polygonal side surfaces 22 of the transparent body 21 or changing the magnitude of the inclination angle θ between the adjacent side surfaces 22. Without changing, it is possible to change the illuminance and irradiation range of the light emitted from the transparent body 21. For this reason, it becomes possible to make the light-emitting device 20 respond | correspond to various specifications.

(Third embodiment)
Next, a light emitting device 30 according to a third embodiment of the invention will be described. In the description, portions common to the light emitting device 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 7 is a perspective view of a light emitting device 30 according to the third embodiment of the present invention. As shown in FIG. 7, the light emitting device 30 includes a transparent body 31 having translucency and a long outer shape, a plurality of light source bodies 11 that irradiate the transparent body 31 with light, and a transparent body. The body 31 includes an elongated phosphor 12 installed on a surface facing the light source body 11 and a substrate 13 on which the plurality of light source bodies 11 are installed. The substrate 13 of this embodiment has a thickness of 1.6 mm, a length of 590 mm, and a width of 6.0 mm, and a glass epoxy substrate or an aluminum substrate is employed. The width may be 22.2 mm. Further, the width W of the light source body 11 is 3.5 mm.

  As shown in FIG. 7, the transparent body 31 has a long outer shape, and its cross-sectional shape has a substantially polygonal shape formed by a plurality of side surfaces 22. The transparent body 31 is a solid body with a solid interior, and a long groove portion 32 cut out along the longitudinal direction of the transparent body 31 is formed on the back side thereof. Both ends of the transparent body 31 in the longitudinal direction are openings 33 that are opened by the grooves 32. The groove portion 32 has a substantially U-shaped cross section, and is formed in an elongated substantially rectangular shape (elongate shape) in plan view from the back side. The groove portion 32 has a substantially rectangular bottom surface 34, and the bottom surface 34 forms a surface facing the plurality of light source bodies 11.

  In addition, it is good also as a structure which obstruct | occludes the opening part 33 formed in the both ends of the transparent body 31 with the transparent body 31. FIG. Further, at both end portions of the transparent body 31, end surfaces are formed in which a plurality of triangular surfaces 35 from each side surface 22 toward the midpoint M of the both end portions are gathered. That is, the tops of the triangular surfaces 35 having a substantially triangular shape (this triangle is not actually visible) are joined at the midpoint M. The transparent body 31 can be integrally formed by, for example, injection molding.

  As shown in FIG. 7, a plurality of light source bodies 11 are arranged on the substrate 13 along the longitudinal direction of the transparent body 31. A plurality of the light source bodies 11 are arranged at equal intervals. Each light source body 11 has a substantially rectangular parallelepiped outer shape. In a state where the transparent body 31 is disposed on the substrate 13, each light source body 11 is covered by the groove portion 32. That is, the plurality of light source bodies 11 are housed in the groove portions 32 of the transparent body 31. At this time, as shown in FIG. 7, the two open end portions 36 serving as the end portions of the groove portion 32 come into contact with the substrate 13. The opening end portion 36 is formed in a linear shape along the longitudinal direction of the transparent body 31.

  Further, as shown in FIG. 7, the phosphor 12 is attached to the bottom surface 34 of the groove 32 formed in the transparent body 31. The phosphor 12 is formed in an elongated substantially rectangular shape corresponding to the shape of the bottom surface 34. Therefore, the phosphor 12 is disposed so as to face the plurality of light source bodies 11. Further, as shown in FIG. 7, the phosphor 12 is attached to the light source body 11 with a gap 37 therebetween. The gap length g of the gap 37 is preferably in the range of 0.1 mm to 5.0 mm.

  Each light source body 11 is an LED that emits blue light, and the phosphor 12 is an attachable phosphor film that emits yellow light. As in the case of the second embodiment of the present invention, the inclination angle θ between the adjacent side surfaces 22 in the transparent body 31 is in the range of 20 ° to 45 °. For this reason, the light that has passed through the phosphor 12 from the light source body 11 and entered the transparent body 31 is refracted toward the front side by the side surface 22 and is efficiently diffused and radiated as white light.

  In the light emitting device 30 configured as described above, the light emitted from the plurality of light source bodies 11 can be efficiently diffused and radiated to the outside through the transparent body 31, so that stronger light is emitted from the transparent body 31. In addition, it is possible to increase the light irradiation range. Moreover, in the light-emitting device 30, since the several light source body 11 is arrange | positioned so that it may become equal intervals, illumination intensity can average and it can comprise the illumination which is easy to see.

  In the light emitting device 30, the transparent body 31 is integrally formed by injection molding. For this reason, the dimensional accuracy is improved, the illuminance of light can be increased with a simple configuration, and the irradiation range can be expanded. Further, by changing the number of the light source bodies 11 installed on the substrate 13, the illuminance and irradiation range of the light emitted from the transparent body 31 can be easily adjusted.

(Fourth embodiment)
Next, a light emitting device 40 according to a fourth embodiment of the invention will be described. In the description, portions common to the light emitting device 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 8 is a side sectional view of a light emitting device 40 according to the fourth embodiment of the present invention.

  As shown in FIG. 8, the light emitting device 40 is configured to include a transparent body 41 that has translucency and has a large space S between the phosphor 12 and a light source device 42 that emits white light. The The light source device 42 accommodates the light source body 11 that emits light, the substrate 13 on which the light source body 11 is installed, the transparent conductive film 43 interposed between the light source body 11 and the substrate 13, and the light source body 11. A frame body 44, a reflector 45 installed inside the frame body 44, a resin body 46 for fixing the light source body 11 to the substrate 13, and a phosphor 12 arranged so as to face the light source body 11. Have.

  As shown in FIG. 8, the transparent body 41 has a substantially spherical outer shape having a space S inside. For example, the transparent body 41 covers the outside of the light source device 42 and forms a substantially spherical light bulb. The outer shape of the transparent body 41 is not limited to a substantially spherical shape, and may be another shape such as a substantially hemispherical shape. Moreover, although the transparent body 41 is formed of a glass material, it may be formed of a translucent resin material such as an acrylic resin.

  The light source body 11 is mounted on the substrate 13 via a transparent conductive film 43 in the form of a chip on board (COB). As the light source body 11, a flip-chip type LED having an n-type electrode and a p-type electrode on the same surface can be adopted. The light source body 11 may be directly mounted on the substrate 13 without using the transparent conductive film 43. The substrate 13 can be a mounting substrate having a heat dissipation function.

  Further, as shown in FIG. 8, a frame body 44 is disposed outside the light source body 11. The front side of the frame body 44 is open, and the light source body 11 is arranged at the center bottom of the opening space 47. The frame body 44 can be formed from, for example, a synthetic resin member or a ceramic member. Inside the frame 44, a reflector 45 for reflecting the light emitted from the light source body 11 is disposed. Examples of the material of the reflector 45 include a light reflective resin to which a filler such as titanium oxide is added and a ceramic such as alumina.

  Further, as shown in FIG. 8, a resin body 46 is disposed in the opening space 47 of the frame body 44. The light source body 11 is fixed in the frame body 44 by the resin body 46. The resin body 46 is obtained by curing a highly transparent resin. Examples of the resin material of the resin body 46 include a silicone resin or an epoxy resin. Note that the resin body 46 may be filled not to be a part of the opening space 47 of the frame body 44 but to fill the entire inside of the frame body 44, that is, the inside of the reflector 45.

  The phosphor 12 is formed as an attachable phosphor film that emits yellow light, and is disposed on the front side of the frame body 44 with the resin body 46 disposed in the frame body 44. Specifically, in a state where the light source body 11 is fixed in the frame body 44 by the resin body 46, the phosphor 12 is attached and fixed to the frame body 44 from the front side.

  In the light emitting device 40, the blue light emitted from the light source body 11 passes through the opening space 47 or the resin body 46 and is then converted into white light by the phosphor 12. Further, when the light source body 11 is covered with the resin body 46, a part of the blue light incident on the resin body 46 or the blue light traveling from the opening space 47 toward the reflector 45 is reflected by the reflector 45 and then fluorescent. It is converted into white light by the body 12. And the white light radiated | emitted from the light source device 42 passes the transparent body 41, and is radiated | emitted outside.

  In the light emitting device 40 configured as described above, the phosphor 12 is attached and fixed to the frame body 44 with the light source body 11 fixed or sealed in the frame body 44. For this reason, the light source device 42 can be manufactured by manufacturing the substrate 13 on which the light source body 11 is mounted in advance and attaching the phosphor 12 to the manufactured substrate 13 later. Therefore, the manufacturing process of the light emitting device 40 can be simplified, the manufacturing efficiency can be improved, and the manufacturing cost of the light emitting device 40 can be reduced.

  Further, in the light emitting device 40, since the phosphor 12 can be attached and fixed, a mixing / stirring process for manufacturing a conventional phosphor is not necessary. For this reason, workability | operativity improves and the quality of the fluorescent substance 12 improves. In addition, since the variation in chromaticity of the phosphor can be suppressed, the color of light can be made uniform, and unevenness in color temperature can be reduced.

  In the light emitting device 40, the phosphor 12 is attached and fixed. For this reason, compared with the case where a fluorescent substance is hardened conventionally, while being able to reduce the amount of fluorescent substance used, working efficiency improves. As a result, the cost can be greatly reduced. Further, since the phosphor 12 can be fixed by pasting, even a person who does not have specialized knowledge about the phosphor 12 can manufacture the light emitting device 42.

(Fifth embodiment)
Next, a light emitting device 60 according to a fifth embodiment of the invention will be described. In the description, portions common to the light emitting device 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 9 is a side sectional view of the light source body 50 of the light emitting device 60 according to the fifth embodiment of the present invention. FIG. 10 is a plan view of the light source body 50 used in the light emitting device 60 according to the fifth embodiment of the present invention as viewed from the front side. FIG. 11 is a plan view of a light emitting device 60 according to the fifth embodiment of the present invention as viewed from the front side. FIG. 12 is a cross-sectional view of the light emitting device 60 in FIG. 11 taken along line AA.

  As shown in FIGS. 9 and 10, the light source body 50 is mounted on the substrate 51 through the substrate 51 formed of aluminum, the printed layer 52 laminated on the front side of the substrate 51, and the printed layer 52. It has the LED chip 53 used as the some light source body, and the fluorescent resin body 54 used as the fluorescent substance which seals the LED chip 53 on the board | substrate 51. FIG.

  As shown in FIG. 10, the substrate 51 has a quadrangular shape in plan view. The substrate 51 is made of aluminum in order to obtain high heat dissipation performance. The surface of the substrate 51 is subjected to an insulation process in order to prevent a surge from occurring in the LED chip 53 or a circuit. The dimensions of the width 51 and the width K in FIG. 10 of the substrate 51 can be formed to be 24 mm and 20 mm, respectively.

  A print layer 52 is laminated on the front side of the substrate 51. As shown in FIG. 10, the printed layer 52 is laminated so as to be circular in plan view. The print layer 52 is laminated by screen printing a ceramic paint on the substrate 51, for example. A wiring pattern (not shown) is formed on the surface of the printing layer 52. A plurality of LED chips 53 are mounted on the front side of the printing layer 52. As shown in FIG. 10, twelve LED chips 53 can be arranged on a substrate 51, for example. The number of LED chips 53 arranged on the substrate 51 may be a plurality other than twelve. As the LED chip 53, a chip-type LED that emits blue light is employed.

  A wiring pattern 55 that is electrically connected to the LED chip 53 is formed on the substrate 51, and a connector terminal 56 is provided on the wiring pattern 55. The connector terminal 56 enables wiring connection with the outside.

  As shown in FIG. 9, the fluorescent resin body 54 is disposed on the print layer 52 in a form that seals the LED chip 53. As shown in FIG. 10, the fluorescent resin body 54 is disposed on the print layer 52 so as to have a circular shape having a smaller diameter than the print layer 52 in plan view. The dimension of the diameter N of the fluorescent resin body 54 can be formed to 15 mm, for example. The fluorescent resin body 54 is obtained by curing a highly transparent resin material. Examples of the resin material of the fluorescent resin body 54 include a silicone resin or an epoxy resin. The fluorescent resin body 54 contains yellow fluorescent powder that emits yellow light. For this reason, the fluorescent resin body 54 is a resin body having a yellow transparent color. Note that the powder contained in the fluorescent resin body 54 is not limited to yellow fluorescent powder, and for example, other types of fluorescent powder such as red fluorescent powder and green fluorescent powder may be included. . Furthermore, in addition to the yellow fluorescent powder, other types of fluorescent powder such as red fluorescent powder and green fluorescent powder may be included. Further, instead of a phosphor, a simple colored silicone resin or a colorless resin material may be used.

  In the light source body 50, the blue light emitted from the plurality of LED chips 53 enters the fluorescent resin body 54. A part of the blue light incident on the fluorescent resin body 54 is absorbed by the yellow fluorescent powder contained in the fluorescent resin body 54 and emits yellow light. On the other hand, blue light that is not absorbed by the yellow fluorescent powder in the fluorescent resin body 54 is emitted from the fluorescent resin body 54 as blue light. Then, white light is emitted by mixing blue light and yellow light that have passed through the fluorescent resin body 54.

  In the light source body 50 configured as described above, a plurality of LED chips 53 are arranged in the fluorescent resin body 54 serving as a light emitting unit, whereby a higher light emission amount can be obtained with one light source body. . For this reason, it becomes easier to apply the light source body 50 to various lighting fixtures. Moreover, the maintenance burden of the lighting fixture to which the light source body 50 is applied can be reduced, and the lighting fixture can be easily designed. Furthermore, since a plurality of light source bodies are incorporated in one device, the irradiation area can be increased and multiple shadows can be prevented from occurring in the irradiation target.

  Moreover, in the light source body 50, when the material of the board | substrate 51 is aluminum, high heat dissipation can be obtained and it becomes possible to reduce thermal resistance. Further, by increasing the areas of the substrate 51 and the fluorescent resin body 54 to be the light emitting part, the heat density emitted from the LED chip 53 can be relaxed, and the heat dissipation of the light source body 50 can be improved. Become. Thus, by realizing high heat dissipation and high output by the plurality of LED chips 53, it becomes possible to improve the light emission efficiency of the entire apparatus. In addition, by applying an insulation treatment to the surface of the substrate 51, it is possible to prevent an excessive current from being applied to the LED chip 53 and the like and a surge from occurring.

  In the light source body 50, the connector terminal 56 is installed on the wiring pattern 55, so that the connector terminal 56 can be used for wiring connection to the outside. For this reason, compared with the case where it connects using the conventional solder, wiring connection becomes easy and it can prevent that a connection part disconnects.

  As shown in FIGS. 11 and 12, the light emitting device 60 is configured by disposing a total of four light source bodies 50 on one surface of a holding substrate 61 and disposing the transparent body 10 with a solid interior on the front side. The holding substrate 61 has a flat plate shape and holds the four light source bodies 50.

  As shown in FIG. 11, two light source bodies 50 are arranged on the holding substrate 61 side by side in the vertical direction in FIG. 11. The transparent body 10 is disposed on the holding substrate 61 so as to cover the four light source bodies 50. Specifically, when the transparent body 10 is disposed on the surface of the holding substrate 61, the four light source bodies 50 are covered with the recesses 14. In the state where the transparent body 10 is disposed on the substrate 61, a gap 62 serving as an air layer is formed between the phosphor 12 attached to the bottom surface 15 of the recess 14 and the light source body 50. At this time, as shown in FIG. 12, since the opening end portion 16 is in contact with the substrate 61, light emitted from the light source body 50 does not leak between the substrate 61 and the transparent body 10.

  In the light emitting device 60, white light or colored light emitted from the light source body 50 passes through the phosphor 12 and the transparent body 10 and is efficiently diffused and emitted to the outside. In addition, the transparent body arrange | positioned on the board | substrate 61 is not limited to the transparent body 10 with a substantially hemispherical cross section, It is good also as the transparent body 41 with a polygonal cross section, the transparent body 41 etc. which have space inside. Further, the number of the light source bodies 50 arranged in the transparent body 10 is not limited to four, but may be three or less, or may be five or more. The light-emitting device 60 is a device for efficiently diffusing and irradiating light within a certain range, and can be applied to, for example, a lighting fixture that illuminates an interior or a projector that illuminates a distant place. Further, a higher output projection device may be configured by mounting a plurality of light emitting devices 60 on one substrate.

  In the light emitting device 60 configured as described above, since the four light source bodies 50 are configured as one unit, a single device can obtain a higher light emission amount and expand the irradiation range. It becomes possible. For this reason, it becomes possible to radiate | emit light of high illuminance over a wide range with a simple structure, and it becomes easier to apply to various lighting fixtures. In addition, by applying the light emitting device 60 to a lighting fixture, it is possible to diffuse and irradiate light with higher illuminance without unevenness than a normal lighting fixture.

(Sixth embodiment)
Next, a light emitting device 70 according to a sixth embodiment of the present invention will be described. In the description, portions common to the light emitting device 60 according to the fifth embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 13: is the top view which looked at the light-emitting device 70 which concerns on the 6th Embodiment of this invention from the front side. FIG. 14 is a cross-sectional view of the light emitting device 70 in FIG. 13 cut along line BB.

  As shown in FIG. 13 and FIG. 14, the light emitting device 70 has a total of six light source bodies 50 according to the fifth embodiment of the present invention arranged in a ring shape on one surface of a flat holding substrate 61, and the front side thereof. It is comprised by arrange | positioning the transparent body 71 with which the inside was substantial. However, the light source body 50 is a hexagonal substrate 51A.

  As shown in FIG. 13, six light source bodies 50 are arranged adjacent to each other on the holding substrate 61 along a ring shape. Further, the transparent body 71 is disposed on the holding substrate 61 so as to cover the six light source bodies 50 in a ring shape. As shown in FIG. 14, the transparent body 71 has a substantially hemispherical cross section, and is formed in a substantially ring shape when viewed from the front and back directions. Further, on the back side of the transparent body 71, a circumferential groove 72 formed in a groove shape toward the front side in a circumferential shape is provided. The circumferential groove 72 is formed so that its cross-sectional shape is substantially U-shaped. For this reason, an outer peripheral end 73 and an inner peripheral end 74 as end portions are formed on the outer peripheral side and the inner peripheral side of the circumferential groove 72, respectively. The phosphor 12 is affixed to the bottom surface 75 of the circumferential groove 72.

  When the transparent body 71 is arranged on the substrate 61, the six light source bodies 50 arranged in a ring shape are covered by the circumferential groove 72. In the state where the transparent body 71 is disposed on the substrate 61, a gap 76 serving as an air layer is formed between the phosphor 12 and the light source body 50. At this time, as shown in FIG. 14, since the outer peripheral end 73 and the inner peripheral end 74 that are the open ends of the circumferential groove 72 are in contact with the substrate 61, the light emitted from the light source body 50 is emitted from the substrate 61. And the transparent body 71 will not leak.

  In the light emitting device 70, white light or colored light emitted from the light source body 50 passes through the phosphor 12 and the transparent body 71 and is efficiently diffused and radiated to the outside. The transparent body disposed on the substrate 61 is not limited to the transparent body 71 having a substantially hemispherical cross section, and may be a ring-shaped transparent body having a polygonal cross section, a transparent body having a space inside, or the like. . Further, the number of light source bodies 50 arranged in a ring shape in the transparent body 71 is not limited to six, and may be five or less, or may be seven or more. Moreover, the light-emitting device 70 can be applied to, for example, a lighting fixture that illuminates indoors or a projector that illuminates far away. Further, a plurality of light emitting devices 70 may be mounted on one substrate to constitute a higher output projection device.

  In the light emitting device 70 configured as described above, since the six light source bodies 50 are configured as one unit, a single device can obtain a higher light emission amount and expand the irradiation range. It becomes possible. For this reason, it becomes possible to radiate | emit light of high illuminance over a wide range with a simple structure, and it becomes easier to apply to various lighting fixtures. In addition, by applying the light emitting device 70 to a lighting fixture, it is possible to diffuse and irradiate light with higher illuminance without unevenness than a normal lighting fixture.

  In the light emitting device 70, a circumferential groove 72 is provided on the back side of the transparent body 71. For this reason, the light emitting device 50 can be completely covered by the transparent body 71, and it is possible to prevent light from the light source body 50 from leaking to the outside. In addition, since a gap 76 is formed between the light source body 50 and the phosphor 12, it is possible to make the light emitted from the light source body 50 incident on the transparent body 71 once diffused. For this reason, it is possible to efficiently diffuse and irradiate light with high illuminance from the light emitting device 70. Moreover, in the light-emitting device 70, since the six light source bodies 50 are arrange | positioned so that it may become equal intervals along a ring shape, illumination intensity can average and it can comprise the illumination which is easy to see.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to each above-mentioned form, It can implement with a various deformation | transformation form.

  In the second and third embodiments described above, the transparent bodies 21 and 31 have a substantially polygonal cross section having ten large side surfaces 22, but the number of side surfaces 22 is limited to ten. Instead, it may be 9 or less, or 11 or more.

  In the first to third, fifth, and sixth embodiments described above, colorless and translucent solid bodies are employed as the transparent bodies 10, 21, 31, and 71. You may make it employ | adopt the solid body which has translucency. In addition, an acrylic resin is used as a material for the transparent bodies 10, 21, 31, 71 from the viewpoint of transparency. For example, polycarbonate may be used in consideration of heat resistance, and other resin materials, A glass material or the like may be used.

  In the above-described embodiments, the boards 13 and 51 are the boards 13 and 51 with circuits. However, the boards 13 and 51 may be simply used or sometimes the boards 13 and 51 may be omitted. Furthermore, in the above-described third embodiment, the groove portion 32 is an elongated, substantially rectangular groove, but may be a groove that is not connected in some places. In the sixth embodiment described above, the circumferential groove 72 is a perfect ring-shaped groove, but may be a groove that is not connected in some places.

  In the first to third embodiments described above, the gap lengths d, f, and g are preferably in the range of 0.1 mm to 5.0 mm. , G may be out of these ranges.

  Further, in the above-described fourth embodiment, the transparent body 41 is disposed outside the phosphor 12 constituting the light source device 42 via the space S. That is, the phosphor 12 is installed between the transparent body 41 and the light source body 11. However, as shown in FIG. 15, the phosphor 12 may be installed on the front side of the transparent body 41 (the side opposite to the light source body 11). At this time, the transparent body 41 is configured to be fixed to the front side of the frame body 44 with an adhesive.

  Moreover, in each above-mentioned embodiment, although the light-emitting device 1, 20, 30, 40, 60, 70 is used as indoor illumination, you may use it as outdoor illumination. Moreover, it is not limited to using as illumination, For example, it may be used for the purpose of illuminating various displays or signboards, or may be used as a guide light, indicator light, emergency light, or various inspection lights. The present invention can be applied to various devices and apparatuses in general that include 30, 40, 60, and 70 as part of the constituent elements.

DESCRIPTION OF SYMBOLS 1, 20, 30, 40, 60, 70 ... Light-emitting device 10, 21, 31, 41, 71 ... Transparent body 11, 50 ... Light source body 12 ... Phosphor 13, 13, 51 ... Substrate 14 ... Recess 15 ... Bottom surface ( Opposing surface)
17, 37, 62, 76 ... gap 22 ... side e ... surface θ ... inclination angle

In order to solve the above-described problems, one aspect of the present invention provides a transparent body having translucency, a substrate on which the transparent body is disposed, light on the transparent body, and one surface of the substrate. In the light emitting device having a plurality of light source bodies disposed on the light source body, the light source body is configured to include one or a plurality of LEDs, and the transparent body is a solid body with a solid interior, The transparent body is provided with a continuous concave portion facing the plurality of light source bodies, and the transparent body has a shape in which the central portion of the solid body facing the light source body is thicker and the peripheral portion is thinner than the central portion by forming the concave portion. A fluorescent material having a fluorescent material that transmits light from is attached to the solid body, and a continuous gap into which air enters is provided between the fluorescent material and the plurality of light source bodies.

The transparent body has a ring-shaped outer shape, the light source body is arranged in a ring shape so as to be covered with the transparent body, and the concave portion is a circumferential groove that covers the light source body . A phosphor is preferably attached to the bottom surface .

Further, the LED emitting blue light the light source, the phosphor and yellow phosphor layer, it is preferred to paste a phosphor layer on the light source body and the opposing surfaces of transparency material.

In order to solve the above-described problems, one aspect of the present invention provides a transparent body having translucency, a substrate on which the transparent body is disposed, light on the transparent body, and one surface of the substrate. In the light emitting device having a plurality of light source bodies disposed on the light source body, the light source body is configured to include one or a plurality of LEDs, and is disposed in a ring shape so as to be covered with the transparent body. Is a solid body with a solid interior and a ring-shaped outer shape, and a transparent body is provided with continuous recesses facing the plurality of light source bodies, and the transparent body faces the light source body by forming the recesses. A solid body with a thick central part and a peripheral part thinner than the central part, and a fluorescent material with a fluorescent material that allows light from the light source body to pass through is attached to the solid body. the gaps continuous air enters between the provided recess, the light source Is a Migihitsuji circumferential groove, the bottom surface of the circumferential groove, in which the phosphor is attached.

Another aspect of the present invention is a transparent body having translucency, a substrate on which the transparent body is disposed, and the transparent body is irradiated with light and disposed on one surface of the substrate. In the light emitting device having a plurality of light source bodies, the light source body is configured to have one or a plurality of LEDs, the transparent body is a solid body with a solid interior, and the cross-sectional shape thereof is a polygonal shape. The inclination angle between one side surface forming the polygonal cross-sectional shape and the other side surface adjacent to the one side surface is in a range of 20 ° to 45 °, The transparent body has a shape in which the central part of the solid body facing the light source body is thicker and the peripheral part is thinner than the central part by forming the concave part. A phosphor with a fluorescent material that allows the light to pass through A continuous gap into which air enters is provided between the light body and the plurality of light source bodies .

Claims (4)

A transparent body having translucency;
A substrate on which the transparent body is disposed;
Illuminating the transparent body with light, and a light source body disposed on one surface of the substrate;
In a light emitting device having
A fluorescent material is provided between the transparent body and the light source body or on the opposite side of the light source of the transparent body, and a fluorescent material that allows light to pass therethrough is installed, and between the fluorescent material and the light source body. A light emitting device provided with a gap for air to enter. The light-emitting device according to claim 1.
The transparent body is a solid body with a solid interior, and the transparent body is provided with a recess where the phosphor is installed, and the recess is disposed on the substrate so as to cover the light source body, A light emitting device characterized in that the gap is within a range of 0.1 to 5 mm. The light-emitting device according to claim 1 or 2,
The transparent body has a polygonal cross-sectional shape, and an inclination angle between one side surface forming the polygonal cross-sectional shape and another side surface adjacent to the one side surface is 20 ° or more and 45 °. A light emitting device having the following range. The light emitting device according to any one of claims 1 to 3,
A light-emitting device, wherein the light source body is an LED that emits blue light, the phosphor is a yellow phosphor film, and the phosphor film is attached to a surface of the translucent material facing the light source body.

Images