WO2011126027A1

WO2011126027A1 - Light-emitting device and light-emitting panel apparatus

Info

Publication number: WO2011126027A1
Application number: PCT/JP2011/058645
Authority: WO
Inventors: 文森柯
Original assignee: 久豊技研株式会社
Priority date: 2010-04-07
Filing date: 2011-04-05
Publication date: 2011-10-13
Also published as: JPWO2011126027A1; JP5196690B2

Abstract

Provided are a light-emitting device and a light-emitting panel apparatus, wherein either enhancing light use efficiency, making handling thereof easier, and/or being able to illuminate an illuminating-target range with high illuminance and without unevenness is enabled. The light-emitting device (1) comprises: a transparent body (10) that has translucency, and that is formed to be ring-shaped as a whole; a substrate (12) onto which the transparent body (10) is to be arranged; and a plurality of light sources (11) that irradiate light towards the transparent body (10), and that are arranged on one face of the substrate (12) so as to be placed along the transparent body (10). The transparent body (10) is made to be a filled body filled to repletion, the cross section thereof is formed to be polygon-shaped, and a ring-shaped circumferential slot (16) is formed on a face of the transparent body (10) at the side facing the one face of the substrate (12), thus making the light sources (11) covered by the circumferential slot (16).

Description

Light emitting device and light emitting panel device

The present invention relates to a light emitting device and a light emitting panel device.

In recent years, attention has been paid to power consumption and lighting efficiency, and lighting devices using LEDs (Light Emitting Diodes) as light sources have been proposed. Patent Document 1 discloses an illumination device in which a plurality of LEDs are arranged on the back side of a ring-shaped diffusion plate having a semicircular cross-sectional shape.

In this lighting device, the LEDs are arranged in a dense state along the ring shape without any gaps. For this reason, the entire outer peripheral curved surface of the diffusion plate having a ring shape functions as a light emitter, and light is emitted in all directions. Accordingly, the entire illumination target area is uniformly illuminated.

JP 2002-367406 A (Abstract)

However, in the lighting device disclosed in Patent Document 1, the space between the ring-shaped diffusion plate and the LED is large, and the light use efficiency tends to be reduced. In addition, the diffusion plate is thin, and there is a risk of cracking during installation. In addition, as shown in FIG. 5 of Patent Document 1, since the light emitted from the lighting device diffuses in all directions, a lot of light is radiated to the side, and an illumination target such as a floor portion. There is a problem in that it is impossible to illuminate the range with high illuminance.

The present invention has been made in view of such a problem, and an object thereof is to provide a light emitting device and a light emitting panel device capable of solving at least one of the above problems.

In order to solve at least one of the above-described problems, the present invention provides a transparent body that is translucent and formed entirely in a ring shape, a substrate on which the transparent body is disposed, and a light for the transparent body. And a light emitting device having a plurality of light sources arranged on one surface of the substrate along the transparent body, the transparent body is a solid body with a solid interior and the cross-sectional shape is a polygonal shape And a ring-shaped circumferential groove is formed on the surface facing the one surface of the substrate, and the light source is covered with the circumferential groove.

In addition, the transparent body preferably has an inclination angle between one side surface forming a polygonal cross-sectional shape and another side surface adjacent to the one side surface in a range of 20 ° to 45 °.

Further, it is preferable that the cross-sectional shape of the transparent body is formed in an asymmetric shape with respect to the central axis of the cross-section.

In addition, it is preferable to arrange a plurality of light emitting devices on one surface of the panel.

According to the present invention, there is provided a light emitting device and a light emitting panel device capable of at least one of high light utilization efficiency, easy handling, and illumination of a target range with high illuminance and evenness. be able to.

It is the principal part top view which looked at the lighting fixture incorporating the light emission panel apparatus which has the light emission device which concerns on the 1st Embodiment of this invention from the front side (lower side of FIG. 2). It is a perspective view of the lighting fixture in which the light emission panel apparatus which has a light-emitting device concerning the 1st Embodiment of this invention was integrated. It is the top view which looked at the light-emitting device in FIG. 1 from the front side. FIG. 4 is a cross-sectional view of the light emitting device of FIG. 3 taken along line AA. FIG. 5 is an enlarged view of a portion surrounded by an alternate long and short dash line B in the light emitting device in FIG. It is the perspective view which looked at the transparent body in FIG. 3 from the diagonal back side. It is the top view which looked at the transparent body in FIG. 3 from the front side. It is the bottom view which looked at the transparent body in FIG. 3 from the back side. It is a side view of the transparent body in FIG. It is the perspective view which looked at the transparent body used for the light-emitting device which concerns on 2nd Embodiment of this invention from the diagonal back side. It is the bottom view which looked at the transparent body shown by FIG. 10 from the back side. It is a figure which shows the modification of this invention, and light emission at the time of forming the clearance gap between the outer peripheral side of a transparent body, and the board | substrate 12 while forming the whole external shape of a transparent body in the cross-sectional polygonal shape which has 12 big side surfaces It is a partial cross section figure which shows an apparatus. It is a figure which shows the modification of this invention, and is a partial cross section figure which shows the light-emitting device at the time of forming a clearance gap between the outer peripheral side of a transparent body, and a board | substrate while forming a part of external shape of a transparent body into circular arc shape. It is. It is a figure which shows the modification of this invention, and is a front view of the transparent body which formed the support part in the substantially X shape. It is a figure which shows the modification of this invention, and is a front view of a transparent body at the time of forming a support part in the outer side of a transparent body. It is a figure which shows the modification of this invention, and is a top view of the transparent body formed by arrange | positioning the substantially ring-shaped transparent body from which a radial dimension differs in radial direction twice. It is a figure which shows the modification of this invention, and is a bottom view of the transparent body formed by arrange | positioning the substantially ring-shaped transparent body from which a radial dimension differs in radial direction twice. FIG. 18 is a view showing a modification of the present invention, and is a side sectional view of the transparent body in FIG. 17 cut along the line MM. It is a figure which shows the modification of this invention, and is a figure at the time of forming an outer shape in the shape of a rod, the upper stage is a top view of the transparent body, and the lower stage is a side view. It is a figure which shows the modification of this invention, and is a top view of the transparent body at the time of forming an external shape in a square. It is a figure which shows the modification of this invention, and is sectional drawing of a transparent body at the time of forming cross-sectional shape in the left-right asymmetrical shape with respect to the center axis line of this cross section. It is a drawing substitute photograph which shows the lighting state of the thing of Example 1 of this invention, and the state made to light in the environment where the circumference was dark was seen from the front side. It is a drawing substitute photograph which shows the lighting state of the thing of Example 2 of this invention, and the state made to light in the environment where the circumference was dark was seen from the front side.

Hereinafter, a light emitting device 1 and a light emitting panel device 2 according to a first embodiment of the present invention will be described with reference to the drawings. In the following description, FIG. 2, FIGS. 4 to 6, 9, 10, the arrow _{X 1} direction shown in FIGS. 12 and 13 respectively define a back table and arrow _{X 2} direction.

FIG. 1 is a plan view of an essential part of a luminaire 3 incorporating a light-emitting panel device 2 having a light-emitting device 1 according to a first embodiment of the present invention as viewed from the front side (the lower side in FIG. 2). FIG. 2 is a perspective view of the lighting fixture 3 in which the light-emitting panel device 2 having the light-emitting device 1 according to the first embodiment of the present invention is incorporated.

The light-emitting panel device 2 is a device for diffusing and irradiating light within a certain range, and is applied to, for example, a lighting fixture 3 (see FIG. 2) installed on the ceiling to illuminate the interior. As shown in FIGS. 1 and 2, the luminaire 3 is configured, for example, by disposing the light emitting panel device 2 in the center of the umbrella 4. The umbrella 4 has an umbrella shape that increases in diameter toward the front side that is the front side of the sheet of FIG. 1 (see FIG. 2). A power supply system (not shown) of the light-emitting panel device 2 is disposed on the back side of the light-emitting panel device 2 (the back side in FIG. 1 and the upper side in FIG. 2).

As shown in FIG. 1, the light emitting panel device 2 is configured by arranging a plurality of (for example, 18) light emitting devices 1 on one surface of the panel 2a. Specifically, the light-emitting panel device 2 includes twelve light-emitting devices 1a1 to 1a12 that are arranged on the outer peripheral side with an equal interval along a ring shape, and the twelve light-emitting devices 1a1 to 1a12. Five light emitting devices 1b1 to 1b5 arranged at equal intervals along the inside of the ring, and one light emitting device 1c1 arranged at the inner center of the five light emitting devices 1b1 to 1b5 It consists of. Light is diffusely irradiated from the light emitting devices 1a1 to 1a12, 1b1 to 1b5, and 1c1 (hereinafter collectively referred to as “light emitting device 1”) toward the front side. Here, the light emitting devices 1a1 and 1a2 are controlled by one control IC 1d1, and the light emitting devices 1a3 and 1a4 are controlled by one control IC 1d2. Similarly, the light emitting devices 1a5 and 1a6 are the control IC 1d3, the light emitting devices 1a7 and 1a8 are the control IC 1d4, the light emitting devices 1a9 and 1a10 are the control IC 1d5, the light emitting devices 1a11 and 1a12 are the control IC 1d6, and the light emitting devices 1b1 and 1b5 are the control. The light emitting devices 1b2 and 1b3 are controlled by the control IC 1d8, and the light emitting devices 1b4 and 1c1 are respectively controlled by the control IC 1d9.

FIG. 3 is a plan view of the light emitting device 1 in FIG. 1 viewed from the front side. FIG. 4 is a cross-sectional view of the light emitting device 1 of FIG. 3 taken along the line AA. FIG. 5 is an enlarged view of a portion surrounded by an alternate long and short dash line B in FIG. FIG. 6 is a perspective view of the transparent body 10 in FIG. 3 viewed from an oblique back side. FIG. 7 is a plan view of the transparent body 10 in FIG. 3 as viewed from the front side. FIG. 8 is a bottom view of the transparent body 10 in FIG. 3 as seen from the back side. FIG. 9 is a side view of the transparent body 10 in FIG.

As shown in FIGS. 3 and 4, the light-emitting device 1 includes a transparent body 10 having translucency and a solid interior, and a plurality of (for example, nine) radiating lights to the transparent body 10. Light source 11 and a substrate 12 on which the light source 11 and a circuit are installed. The light sources 11 are arranged in a ring shape at equal intervals on the surface (the side on which the transparent body 10 is mounted) that is one surface of the substrate 12. The transparent body 10 is provided with a support portion 13 which is an example of a support means, and the support portion 13 is fixed to the substrate 12 by using bolts 14 and nuts 15 which are an example of fixing means. Is mounted on the substrate 12. That is, the transparent body 10 is mounted on the substrate 12 via the support portion 13. Although the substrate 12 is different from the panel 2 a for the sake of explanation, the panel 2 a may also serve as the substrate 12.

As shown in FIGS. 4 to 9, the transparent body 10 has a substantially polygonal 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 10, a circumferential groove 16 formed in a groove shape toward the front side in a circumferential shape is provided. The circumferential groove 16 is formed so that its cross-sectional shape is substantially U-shaped. The transparent body 10 has an outer diameter D of about 30 mm and an inner diameter E of about 10 mm. When the transparent body 10 is arranged on the surface of the substrate 12, the light source 11 arranged in a ring shape is covered by the circumferential groove 16. In the state where the transparent body 10 is arranged on the front side of the substrate 12, a gap G (see FIGS. 4 and 5) serving as an air layer is formed between the circumferential groove 16 and the light source 11. That is, the width dimension H and the depth dimension J of the circumferential groove 16 are formed to be larger than the radial width dimension K and height dimension L of the light source 11 (see FIG. 5).

As shown in FIGS. 4 and 5, the cross-sectional shape of the transparent body 10 has a substantially polygonal shape formed by a plurality of side surfaces 17. As shown in FIG. 5, the inclination angle θ between one side surface 17 forming a polygonal cross section in the transparent body 10 and the other side surface 17 adjacent to the one side surface 17 is 20 ° or more and 45 ° or less. It is considered as a range. In the present embodiment, as shown in FIG. 5, the transparent body 10 has ten large side surfaces 17 and two small side surfaces 17. In addition, if the magnitude | size of inclination-angle (theta) changes, the width dimension and number of the side surface 17 will also change with the change. Here, when the inclination angle θ is 20 ° or more, the light incident on the transparent body 10 from the light source 11 is less likely to be totally reflected on the side surface 17, and the light from the light source 11 is radiated forward from the transparent body 10. The rate of being increased. For this reason, the amount of light in the front is less likely to fall with a transparent body having a circular cross section. On the other hand, when the inclination angle θ is 45 ° or less, the light incident on the transparent body 10 from the light source 11 is less likely to be refracted outward in the circumferential direction at the side surface 17, and the light is circumferentially outward, that is, 4. Difficult to diffuse in the left-right direction in FIG. For this reason, by making the inclination angle θ in the range of 20 ° or more and 45 ° or less, the light incident on the transparent body 10 is refracted toward the front side by the side surface 17, and the light is directed from the transparent body 10 in the front direction. Can be diffused. As a result, it becomes possible to diffuse and radiate light toward the front direction efficiently.

The transparent body 10 is not a space but a solid body, and is formed of, for example, 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.

As shown in FIGS. 6 to 8, the support portion 13 is disposed in a space on the inner peripheral side of the transparent body 10, and has a substantially cylindrical center portion 21 having a through hole 20, and the center portion 21. It is comprised by the two

arm parts

22 and 22 extended so that it may oppose toward the circumferential direction outward (refer FIG. 7, FIG. 8). The through hole 20 of the central portion 21 is formed so that its central axis coincides with the central axis of the transparent body 10. The

arm portions

22, 22 have a shape that is a gentle arc when viewed from the front and back directions and is curved so as to be 180 ° rotationally symmetric with respect to the central axis of the central portion 21. The

arm portions

22, 22 have one inner end integrated with the outer peripheral surface of the center portion 21, and the other outer ends 22 a, 22 a integrated with the inner peripheral surface of the transparent body 10. The other ends 22a and 22a are integrally formed with the transparent body 10 by injection molding, but the support portion 13 may be formed as a separate body, and the support portion 13 may be fixed to the transparent body 10 with an adhesive or the like. With such a configuration, the support portion 13 is held in the space on the inner peripheral side of the transparent body 10.

Further, in the vicinity of the outer ends 22a, 22a on the outer sides of the

arm portions

22, 22, one protrusion 23 having a substantially cylindrical shape is formed to protrude toward the back side. The

protrusions

23 and 23 are used for positioning and rotation prevention when the transparent body 10 is attached to the substrate 12 having a constant thickness. The

protrusions

23 and 23 are provided at two positions that are point-symmetric about the center portion 21. As shown in FIG. 4, for example, an end surface 22 b on the back side of the arm portion 22 is formed at the same height as the peripheral end portion 10 a on the back side of the transparent body 10. For this reason, when the transparent body 10 is fixed to the substrate 12 via the support portion 13, the end surface 22 b of the arm portion 22 and the peripheral end portion 10 a on the back side of the transparent body 10 come into contact with the surface of the substrate 12. 10 can be disposed in a stable state with no gap with respect to the substrate 12. Further, since the peripheral end portion 10 a on the back side of the transparent body 10 is in contact with the surface of the substrate 12, the light source 11 is accommodated in a space formed by the substrate 12 and the circumferential groove 16. For this reason, light emitted from the light source 11 does not leak from between the substrate 12 and the transparent body 10.

The substrate 12 is provided with a through hole 24 (see FIG. 4) having substantially the same dimensions as the through hole 20 of the support portion 13, and the projections 23, Protrusion holes 25 and 25 are provided so as to correspond to 23. As shown in FIG. 4, the

protrusions

23, 23 are inserted into the protrusion holes 25, 25, and the end surface 22 b on the back side of the arm portion 22 comes into contact with the surface of the substrate 12, so that the support portion 13 is against the substrate 12. It is positioned and the transparent body 10 is prevented from rotating in the circumferential direction. In addition, you may make it form the hole 25 for protrusions 25 as a recessed part into which the projection part 23 fits instead of the form of a hole. Further, three or more arm portions 22 may be provided, and a projection 23 may be provided on each of the arm portions 22 and a through hole 24 or a recess may be provided at a position facing the projection 23.

When the

protrusions

23 and 23 are inserted into the protrusion holes 25 and 25, the position of the through hole 20 of the support portion 13 and the position of the through hole 24 of the substrate 12 are aligned. In this state, the transparent body 10 is positioned with respect to the substrate 12 by inserting the bolts 14 from above the through holes 20 and screwing the nuts 15 into the screw portions of the bolts 14 penetrating the substrate 12. It is fixed with. The substrate 12 has a through hole (not shown) for passing a lead wire (not shown).

As described above, a total of nine light sources 11 are arranged in a ring shape at equal intervals on the surface of the substrate 12, and are connected to a wiring pattern (not shown) and the light sources 11 around the light sources 11. Solder pads 26 are provided (see FIG. 3). In the present embodiment, a two-chip type LED (Light Emitting Diode) with a power consumption of 0.06 W is adopted as the light source 11, but other forms of LEDs and other light sources may be used.

Next, the operation of the light emitting device 1 and the light emitting panel device 2 will be described. As shown in FIG. 1, the light-emitting panel device 2 is attached to the lighting fixture 3 such that the plurality of transparent bodies 10 face the front side that is the irradiation side. This lighting fixture 3 is installed in arbitrary positions, such as indoors. When a switch (not shown) is turned on and electricity is supplied from the power source to the light source 11 provided on the front side of the substrate 12, the light source 11 disposed in each light emitting device 1 is turned on, and the light source 11 is directed toward the transparent body 10. Light is irradiated. The light emitted from the light source 11 passes through the gap G existing between the light source 11 and the circumferential groove 16 of the transparent body 10 and enters the transparent body 10. At this time, most of the light from the light source 11 is emitted upward in FIGS. 4 and 5, but part of the light is emitted laterally or obliquely upward near the lateral direction. However, the light emitted in the lateral direction also enters the inside of the transparent body 10 and is guided to the front (= upward) side by the side surface 17 and is emitted from the upper (front) side.

The light incident on the transparent body 10 is refracted and reflected by the side surface 17 of the transparent body 10 having a substantially polygonal cross section, and finally exits to the outside. Note that most of the light is refracted toward the front side (upper side in FIGS. 4 and 5) at the side surface 17, and is emitted to the outside in this 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. When the emission range of the light source 11 is, for example, a range of 100 ° to 120 °, that is, the left and right angles θ1, θ2 with respect to the optical axis L1 that is the central axis of the emitted light from the light source 11 shown in FIG. In the range of 50 ° to 60 °, the light emitting device 1 can irradiate the light of the light source 11 further forward. When the light-emitting device 1 in such a state is viewed from the outside, it appears that the transparent body 10 emits light uniformly and brightly in a circumferential shape, and a light ring is formed. Moreover, from the light emission panel apparatus 2, the light radiated | emitted from the transparent body 10 is united, and is uniformly diffused and irradiated toward the front side. The optical axis L1 coincides with the central axis L2 of each cross section of the transparent body 10, but the optical axis L1 and the central axis L2 may not be coincident. Further, the angle θ1 and the angle θ2 may not be the same.

Next, the transparent body 30 used in the light emitting device 1A according to the second embodiment will be described. In the description, portions common to the light emitting device 1 according to the first embodiment will be described with the same reference numerals.

In the first embodiment described above, a transparent body 10 having a relatively small diameter having an outer diameter of about 30 mm and an inner diameter of about 10 mm is employed. For example, as shown in FIGS. In addition, a transparent body 30 having an outer diameter larger than that of the transparent body 10 having an outer diameter of about 55 mm and an inner diameter of about 35 mm may be employed in the light emitting device 1A according to the second embodiment. In this

light emitting device

1A, 20 light sources 11 made of LEDs are used. In the case of the light emitting device 1 A, as shown in FIG. 11, the support portion 31 can be formed in a substantially S shape when viewed from the front and back directions. This support portion 31 forms a substantially S-shape, with a protrusion 23 provided at the center of a substantially S-shape, two center portions 21 provided at two positions that are point-symmetric about the protrusion 23. It has an arm part 32. The arm portion 32 is provided in a form that connects the two

center portions

21 and 21 and connects the

center portions

21 and 21 and the inner peripheral portion of the transparent body 30.

When mounting the transparent body 30 on the front side of the substrate 12, it is performed as follows. The substrate 12 is provided with a projection hole 25 into which the projection 23 is inserted and two through holes 24 into which bolts are inserted. Therefore, when mounting, the projection 23 is inserted into the projection hole 25, the bolt 14 is inserted so as to pass through the through hole 24 from above the through hole 20, and the screw portion of the bolt 14 that penetrates the substrate 12. And the nut 15 is screwed together. As a result, the transparent body 30 is fixed to the substrate 12. Further, a plurality of light emitting devices 1A using the transparent body 30 may be installed to form a light emitting panel device.

In the

light emitting device

1, 1 A configured as described above, the circumferential groove 16 is provided on the back side of the

transparent bodies

10, 30. For this reason, the light source 11 can be completely covered with the

transparent bodies

10 and 30, and it becomes possible to prevent the light from the light source 11 from leaking outside. In addition, since the gap G is formed between the light source 11 and the circumferential groove 16, the light emitted from the light source 11 can be incident on the transparent body 10 in a state of being once diffused. For this reason, it becomes possible to diffusely irradiate light with high illuminance from the

light emitting devices

1 and 1A.

In the

light emitting devices

1 and 1A, since the

transparent bodies

10 and 30 have a substantially polygonal cross section, the light incident on the

transparent bodies

10 and 30 is refracted and reflected toward the front side by the side surface 17. To the outside. Further, as described above, the inclination angle θ is in the range of 20 ° to 45 °. For this reason, the light incident on the

transparent bodies

10 and 30 can be refracted by the side surface 17, and strong light can be diffused and emitted from the

transparent bodies

10 and 30 in the front direction. As a result, it becomes possible to emit light with higher illuminance without unevenness toward the irradiation target. Further, by changing the magnitude of the inclination angle θ, it is possible to easily adjust the illuminance and irradiation range of the light emitted from the

transparent bodies

10 and 30.

In the light emitting device 1, the transparent body 10 is positioned with respect to the substrate 12 and the rotation of the transparent body 10 is reliably prevented by inserting the

protrusions

23 and 23 into the protrusion holes 25 and 25. . In the light emitting device 1 A, the transparent body 30 is positioned on the substrate 12 by inserting the protrusions 23 into the protrusion holes 25. Accordingly, the

transparent bodies

10 and 30 can be accurately arranged with respect to the substrate 12. Further, since the

transparent bodies

10 and 30 are attached to the substrate 12 using the bolts 14 and the nuts 15 and the like, the

transparent bodies

10 and 30 can be attached to and detached from the substrate 12 by simple means.

Further, in the

light emitting devices

1 and 1A, since the

transparent bodies

10 and 30 and the

support portions

13 and 31 are integrally formed by injection molding, the dimensional accuracy is improved and the part shape is stabilized, and the transparent body 10 has a simple configuration. , 30 can be supported.

Further, in the light emitting panel device 2 having the

light emitting devices

1 and 1A according to each of the above-described embodiments, a plurality of light emitting devices 1 are provided on one side surface which is the front side of the panel 2a. Light of illuminance is combined and diffused outside. For this reason, in the lighting fixture 3 using the light emission panel apparatus 2, it becomes possible to carry out diffuse irradiation of the light of high illuminance without unevenness compared with a normal lighting fixture. Moreover, in the light emitting panel device 2 of this embodiment, since the plurality of light emitting devices 1 are arranged at equal intervals in the circumferential direction with respect to the center of the lighting fixture 3, the illumination is averaged and the illumination 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 each of the above-described embodiments, a total of 18 light-emitting devices 1 are disposed in the light-emitting panel device 2, but the number of light-emitting devices 1 disposed is not limited to 18; It may be greater than or equal to 17 or less. Further, the light emitting device 1 may be arranged on the substrate 12 in another form instead of the ring shape.

In each of the above-described embodiments, the

transparent bodies

10 and 30 have a substantially polygonal cross section having 10 large side surfaces 17 and two small side surfaces 17, but the number of side surfaces 17 is twelve. It is not limited and may be 11 or less, or 13 or more. Further, only the large side surface 17 may be provided without providing the small side surface 17.

Further, in each of the above-described embodiments, a colorless and translucent solid body is employed as the

transparent bodies

10 and 30, but a colored and translucent solid body may be employed. . In addition, acrylic resin is used as the material of the

transparent bodies

10 and 30 from the viewpoint of transparency. For example, polycarbonate may be used in consideration of heat resistance or the like, and other resin materials or glass materials may be used. It may be used.

Further, in each of the embodiments described above, a two-chip type LED is used as the light source 11, but the light source 11 is not limited to a two-chip type LED, for example, a three-chip type or a four-chip type. It is good also as this LED. Moreover, you may make it employ | adopt as light sources 11 light emitting elements other than LED, such as an organic EL light emitting element (especially white light emitting organic EL element).

In each of the above-described embodiments, the

light emitting devices

1 and 1A are fixed to the substrate 12 by the fixing means including the bolts 14 and the nuts 15. However, the fixing means is not limited to the bolts 14 and the nuts 15. Instead, for example, the light-emitting

device

1, 1 A may be fixed to the substrate 12 using other means such as a fitting-type fixing method.

Moreover, in the above-mentioned embodiment, although the

transparent bodies

10 and 30 are exhibiting the cross-sectional polygonal shape which has ten large side surfaces and two small side surfaces 17, as shown in FIG. You may make it form in the cross-sectional polygonal shape which has the large side surface 17 of. Further, as shown in FIG. 12, the uppermost side surface 17 in the drawing may be parallel to the surface of the substrate 12. If it does in this way, the light of the direction of the optical axis L1 will be stabilized. Further, the

transparent bodies

10 and 30 are not formed in a polygonal cross-section, but as shown in FIG. A part of the diameter, for example, the lower half on the light source 11 side, may be formed on the circular surface 17a having an arc shape. Furthermore, it is the same in that the circumferential groove 16 is provided in a part of the transparent body whose interior is enriched, and the outer shape of the transparent body may be circular in cross section. Even when such a transparent body having a circular cross section is used, the emitted light is considerably bright and concentrated, as will be described later. Further, as shown in FIGS. 12 and 13, a gap g 1 may be formed between the outer peripheral side of the

transparent bodies

10 and 30 and the substrate 12 so that the light source 11 is not completely covered. In the example shown in FIGS. 12 and 13, the

transparent bodies

10 and 30 are supported on the substrate 12 only on the

support portions

13 and 31 side.

Further, in each of the above-described embodiments, the

support portions

13 and 31 are formed in a curved shape so as to have a gentle arc shape when viewed from the front and back directions and 180 ° rotational symmetry with respect to the central axis of the central portion 21 or the protrusion 23. However, as shown in FIG. 14, the

support portions

13 and 31 are formed in a substantially X shape when viewed from the front and back directions, and the X shape is formed on one linear portion forming the X shape of the

support portions

13 and 31. Two central portions 21 are provided so as to be 180 ° rotationally symmetric with respect to the center of the X axis, and two linear portions forming the X shape are provided so as to be 180 ° rotationally symmetric with respect to the center of the X shape. The protrusion 23 may be provided. Further, the support portion may be provided not on the inner peripheral side of the transparent body 10 but on the outer peripheral side. In this case, for example, as shown in FIG. 15, it is possible to provide the central portion 21 and the protrusion 23 at three positions that are 120 ° rotationally symmetric with respect to the central axis of the

transparent bodies

10 and 30. Become.

In each of the above-described embodiments, the substrate 12 is the substrate 12 with a circuit. However, the substrate 12 may be a simple plate or sometimes the substrate 12 may be eliminated. Furthermore, although the circumferential groove 16 is a complete ring-shaped groove, it may be a groove that is not connected at any point. In each of the above-described embodiments, a plurality of light emitting

devices

1 and 1A are arranged on one panel 2a, but one small or large

light emitting device

1 and 1A are arranged on one small or large substrate 12. It may be a thing.

In the above-described embodiments, the

light emitting devices

1 and 1A and the light emitting panel device 2 are used as indoor lighting, but may be used as outdoor lighting. 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 the apparatus 2 as a component.

In each of the above-described embodiments, the

light emitting devices

1 and 1A are configured by adopting the transparent body 10 having an outer diameter of about 30 mm or the transparent body 30 having an outer diameter of about 55 mm. However, as shown in FIGS. 16, 17, and 18, the transparent body 40 having a configuration in which the transparent body 30 having an outer diameter of about 55 mm is disposed on the radially outer side of the transparent body 10 having an outer diameter of about 30 mm. It is also good. That is, the transparent body 40 has a structure in which the transparent body 10 and the transparent body 30 are used in combination. Specifically, the transparent body 40 includes a transparent body 10 having a substantially ring shape provided with the support portion 13, a transparent body 30 having a substantially ring shape larger in diameter than the transparent body 10, and the transparent body 10 and the transparent body 30. And four arm members 41 that connect the two. As in the case of the first and second embodiments, the

transparent bodies

10 and 30 have a substantially polygonal cross section, and a circumferential groove 16 is provided on the back side thereof.

Here, the support portion 13 has a center portion 21 having a through hole 20 for bolts, and two

arm portions

22 and 22 extending from the center portion 21. Further,

projections

23 and 23 are formed on the other ends 22 a and 22 a of the arm portion 22. A total of four arm members 41 are formed every 90 ° along the circumferential direction between the transparent body 10 and the transparent body 30, and are formed in an approximately arc shape that is gentle when viewed from the front and back directions. Specifically, two pairs of

arm members

41, 41 formed so as to be 180 ° rotationally symmetric with respect to the central axis of the central portion 21 are disposed at an interval of 180 ° in the circumferential direction. ing. In the vicinity of the other end 41a on the radially outer side of each arm member 41, a protrusion 42 that protrudes in a substantially cylindrical shape toward the back side is provided. One end of the arm member 41 is integrated with the outer peripheral surface of the transparent body 10, and the other other end 41 a thereof is integrated with the inner peripheral surface of the transparent body 30. When the transparent body 40 is fixed to the substrate 12, the

protrusions

23 and 42 are inserted into the protrusion holes 25 provided in the substrate 12 to position the transparent body 40 and restrict its rotation. As shown in FIG. 18, the transparent body 40 is formed so that the end surface 44 on the back side of the transparent body 30 is positioned slightly in the back direction than the end surface 43 on the back side of the transparent body 10. In this way, by configuring the transparent body 40 by using the transparent body 10 and the transparent body 30 in combination, it is possible to improve the illuminance of the

light emitting devices

1 and 1A while effectively utilizing the space.

Moreover, although the transparent body 40 is set as the structure which uses the two

transparent bodies

10 and 30 which have a substantially ring-shaped form and was made into the polygonal cross section, it is not limited to such a structure. . For example, the transparent body 40 may be formed by arranging three or more transparent bodies having substantially ring shapes and different polygonal cross sections in the radial direction. In addition, when a plurality of transparent bodies are arranged, it is preferable that all of them have a polygonal cross section, but any one is a substantially ring-shaped transparent body having a polygonal cross section, and the rest are of other configurations. For example, a transparent body having a substantially ring shape and a circular section may be used.

Further, in each of the embodiments described above, the

transparent bodies

10 and 30 are formed in a substantially ring shape when viewed from the front and back directions, but are not limited to such a shape, and are rod-shaped as shown in FIG. The transparent body 50 may be formed. In this case, it is preferable to form the circumferential groove 16 so that the transparent body 50 is hollowed out from the back side as indicated by a broken line in FIG. The transparent body 50 has a polygonal cross section similar to the

transparent bodies

10 and 30. Moreover, as shown in FIG. 20, it is good also as the transparent body 60 which is square shape seeing from the front and back direction, and a cross-sectional polygonal shape. Moreover, you may make it form the shape seen from the front and back direction into other polygonal shapes, such as a triangle and a pentagon. Thus, the overall shape can be various shapes other than the ring shape. These

transparent bodies

50 and 60 and other shapes of transparent bodies have a polygonal cross section in any case. In addition, although it is preferable that all are made into cross-sectional polygonal shape when arrange | positioning more than one, you may make it not make any one or more into cross-sectional polygonal shape.

In the above-described embodiments, the

transparent bodies

10 and 30 have a cross-sectional shape that is symmetric with respect to the central axis L2, but may be asymmetrical with respect to the central axis L2. Specifically, as shown in FIG. 21, the

transparent bodies

10 and 30 have ten side surfaces 17a1 to 17a10 on the left side (center side) with respect to the central axis L2, and 11 on the right side (outward side). Each side surface 17b1 to 17b11 is provided. That is, the

transparent bodies

10 and 30 have different numbers of side surfaces 17 on the left and right sides of the central axis L2. Here, the angles α1 and β1 between the tangent line NN in contact with the top 61 of the

transparent bodies

10 and 30 and the left and right side surfaces 17a1 and 17b1 are formed at the same angle as 10.69 °, respectively. In addition, the angles α2 and β2 between the tangent line NN and the side surfaces 17a2 and 17b2 are respectively formed at the same angle as 23.01 °. From this, in the area | region from the top part 61 to each side surface 17a2, 17b2, the

transparent bodies

10 and 30 are exhibiting the left-right symmetric shape. On the other hand, the angle α3 between the tangent line NN and the side surface 17a3 is formed at 41.51 °, and the angle β3 between the tangent line NN and the side surface 17b3 is formed at 35.34 °. For this reason, the

transparent bodies

10 and 30 are exhibiting the left-right asymmetric shape in the part of the side surface 17a3 and the side surface 17b3.

The angles α4, α5, α6, α7 between the tangent line NN and the side surfaces 17a4, 17a5, 17a6, 17a7 are 50.75 °, 60.00 °, 68.75 °, and 77.50 °, respectively. Is formed. On the other hand, angles β4, β5, β6, β7, β8 between the tangent line NN and the side surfaces 17b4, 17b5, 17b6, 17b7, 17b8 are 41.51 °, 47.67 °, 53.84 °, respectively. It is formed at 65.67 ° and 77.50 °. The

transparent bodies

10 and 30 are formed at the same angle at α7 and β8. Further, the angles α8, α9, α10 between the central axis L2 and the side surfaces 17a8, 17a9, 17a10 are formed at 7.03 °, 30.65 °, and 55.02 °, respectively. Further, the angles β9, β10, β11 between the central axis L2 and the side surfaces 17b9, 17b10, 17b11 are 7.03 °, 30.65 °, and 55.5, as in the case of the angles α8, α9, α10, respectively. It is formed at 02 °. Thus, in this embodiment, the cross-sectional shape of the

transparent bodies

10 and 30 is asymmetrical with respect to the central axis L2, and the portion of the surface toward the light source 11 is symmetric. Yes. By adopting this shape, the illuminance when the

transparent bodies

10 and 30 are placed at a height of 1 m and 3 m is increased by several percent to several tens of percent as compared to the overall symmetrical one.

In addition, although the cross-sectional shape of the

transparent bodies

10 and 30 is formed in the left-right asymmetrical shape with respect to the central axis L2, the asymmetrical method is basically the number of the outer surfaces, and the surface on the center side. However, depending on the application, the number of outer surfaces may be smaller than the number of central surfaces. Good. Moreover, although the number of the left and right side surfaces 17 is different in this modification, the number of the side surfaces 17 may be the same, and the cross-sectional shapes of the

transparent bodies

10 and 30 may be asymmetrical shapes. As for the asymmetric method, the surface portion toward the light source 11 may be asymmetrical, but the surface portion toward the light source 11 is preferably symmetric in terms of manufacturing.

Hereinafter, an example of an LED in which a transparent body is not provided, and examples and comparative examples of the present invention will be described. Table 1 shows the results obtained for the LED only, Examples 1 and 2, and Comparative Example.

(Example of LED only)
In a state where 30 LEDs are arranged on the substrate 12 at regular intervals so as to follow a circumferential shape having a diameter of about 50 mm, the LEDs are turned on, and illuminance is obtained at the central positions 150 mm, 390 mm and 1500 mm away from the substrate 12. The measured values were 18750 (lux), 4084 (lux) and 83 (lux), respectively.

Example 1
A total of 30 LEDs were arranged on the substrate 12 with equidistant gaps along a circumference of about 50 mm in diameter. Then, a transparent body having a substantially circular cross section and provided with a circumferential groove 16 on the back side was disposed on the substrate 12 so as to cover the LED with the circumferential groove 16. A transparent body having an outer diameter of about 90 mm was employed. When the illuminance was measured at center positions (LED optical axis positions) 150 mm, 390 mm, and 1500 mm away from the substrate 12, the measured values were 32200 (lux), 4890 (lux), and 190 (lux), respectively. The illuminance was measured using GL-03 (manufactured by Beads Co., Ltd.) as an illuminometer in an environment of a temperature of 21 ° C. and a humidity of 50% RH.

(Example 2)
A total of 30 LEDs were arranged on the substrate 12 with equidistant gaps along a circumference of about 50 mm in diameter. Then, the entire outer shape of the cross section is substantially polygonal, and a transparent body having a circumferential groove 16 on the back side is disposed on the substrate 12 so that the LED is completely covered by the circumferential groove 16. . As the transparent body, one having an inclination angle θ of 30 ° and an outer diameter of about 90 mm in diameter was employed. When the illuminance was measured at the central positions 150 mm, 390 mm and 1500 mm away from the substrate 12, the measured values were 28100 (lux), 7288 (lux) and 231 (lux), respectively. The illuminance was measured using the same illuminometer as in Example 1 under the same environment as in Example 1.

(Comparative example)
A total of 30 LEDs were arranged on the substrate 12 with equidistant gaps along a circumference of about 50 mm in diameter. Then, a transparent body having a circular cross section in which the circumferential groove 16 is not formed and having a solid inside is disposed on the substrate 12 in a form having a gap (gap) between the LED and the LED. A transparent body having an outer diameter of about 90 mm was employed. In addition, when 30 LEDs are arranged on the substrate 12 and the LEDs are turned on, and the illuminance is measured at the center positions 150 mm, 390 mm, and 1500 mm away from the substrate 12, the measured values are 18750 (lux), respectively. 4084 (lux) and 83 (lux). On the other hand, when the illuminance is measured at positions 150 mm, 390 mm and 1500 mm away from the substrate 12 with a transparent body having a circular cross section disposed on the front side of the LED, the measured values are 23633 (lux) and 3655 (lux), respectively. And 144 (lux). The illuminance was measured using GL-03 (manufactured by Beads Co., Ltd.) as an illuminometer in an environment of a temperature of 21 ° C. and a humidity of 50% RH.

Table 1 shows the results of Examples and Comparative Examples.

As shown in Table 1, in Example 1 in which the cross-section is circular and the circumferential groove 16 is provided, the illuminance at positions 150 mm, 390 mm, and 1500 mm away from the substrate 12 as compared with the case where only the LED is disposed. Increased to 171.7%, 119.7%, and 228%, respectively, and it was confirmed that the illuminance increased at each measurement distance. Further, as can be seen from the front side of the lighting state of Example 1 shown in FIG. 22 (the state of lighting in an environment in which the surroundings are darkened), the light source 11 has a fairly beautiful oval shape, and It is very bright. Further, in Example 2 having a substantially polygonal cross section and provided with the circumferential groove 16, the illuminance at positions 150 mm, 390 mm and 1500 mm away from the substrate is 149. It increased to 8%, 178.5%, and 256.6%, and it was confirmed that the illuminance increased at each measurement distance. Further, as can be seen from the front side of the lighting state of Example 2 shown in FIG. 23 (the state of lighting in an environment where the surroundings are darkened), the appearance of the light source 11 is the same as in Example 1. Compared to the longitudinal direction, it is considerably expanded. As described above, in the second embodiment, the light from the light source 11 can be effectively used while the same light source 11 is used and the size of the transparent body is the same.

Further, from these results, it was confirmed that the illuminance at positions 390 mm and 1500 mm away from the substrate 12 was higher in Example 2 than in Example 1. On the other hand, the illuminance at a position 150 mm away from the substrate 12 was confirmed to be higher in Example 1 than in Example 2. Specifically, the illuminance of Example 2 is reduced to 87.3% at a position 150 mm away from the substrate as compared to Example 1, but at 149.9% and 390 mm and 1500 mm away from the substrate, respectively. It increased to 121.6%, and it was confirmed that the illuminance increased particularly at positions 390 mm and 1500 mm apart. Thus, when irradiating a position that is somewhat distant, it is preferable to use the light emitting device of Example 2, and when irradiating a relatively close position, it is preferable to use the light emitting device of Example 1. It could be confirmed.

Next, comparing Example 1 and the comparative example, in Example 1, the illuminance at positions 150 mm, 390 mm, and 1500 mm away from the substrate 12 is 136.3%, 133.8, and 131.13, respectively, as compared with the comparative example. It increased to 9%, and it was confirmed that the illuminance increased to the same extent at each measurement distance. Further, comparing Example 2 and the comparative example, in Example 2, the illuminance at positions 150 mm, 390 mm, and 1500 mm away from the substrate is 118.9%, 199.4, and 155.9%, respectively, compared to the comparative example. In particular, it was confirmed that the illuminance at positions 390 mm and 1500 mm apart increased.

From the above, it was found that by providing the circumferential groove 16, the illuminance can be improved by about 130% regardless of the irradiation distance. Moreover, it turned out that the illumination intensity in the position which was 390 mm and 1500 mm away, ie, the position far away, can be improved significantly by making a cross section into a polygonal shape. This is also due to the difference between FIG. 22 (using a transparent body having a circular cross section) and FIG. 23 (using a transparent body having a polygonal cross section), that is, the difference in the appearance of the light source 11 (difference in the state of emitted light). It has become.

DESCRIPTION OF SYMBOLS 1 ... Light-emitting device 2 ... Light-emitting panel apparatus 2a ... Panel 10 ... Transparent body 11 ... Light source 12 ... Board | substrate 13 ... Support part (support means)
14 ... Bolt (part of fixing means)
15 ... Nut (part of fixing means)
16 ... Circumferential groove θ ... Angle of inclination

Claims

A transparent body having translucency and entirely formed in a ring shape;
A substrate on which the transparent body is disposed;
A plurality of light sources arranged on one surface of the substrate so as to illuminate the transparent body and follow the transparent body,
In a light emitting device having
The transparent body is a solid body with a solid interior and its cross-sectional shape is formed in a polygonal shape, and a ring-shaped circumferential groove is formed on the surface facing the one surface of the substrate,
A light-emitting device, wherein the light source is covered with the circumferential groove.
The light-emitting device according to claim 1.
The transparent body has an inclination angle between one side surface forming a polygonal cross-sectional shape and another side surface adjacent to the one side surface in a range of 20 ° to 45 °. apparatus.
The light-emitting device according to claim 1 or 2,
The cross-sectional shape of the transparent body is formed in an asymmetric shape with respect to the central axis of the cross-section.
A light-emitting panel device comprising a plurality of light-emitting devices according to any one of claims 1 to 3 arranged on one surface of the panel.