JP4834189B1 - Lighting device - Google Patents

Abstract

An illumination device capable of manufacturing a plurality of models with different brightness at low cost is realized.
A lighting device according to the present invention includes a plurality of light emitting portions having LEDs 8a and 8b for emitting light, and at least a part of the light emitting portion 4 is a mounting area for mounting the LEDs 8a and 8b. There are a plurality of 7a and 7b. By selecting either 1 or 2 as the number of LEDs to be mounted on the light emitting unit 4, it is possible to manufacture a plurality of types of lighting devices having different brightness using the same transmission unit 3.
[Selection] Figure 3

Description

  The present invention relates to a lighting device, and more particularly to a lighting device using an LED as a light source.

  Since LEDs (light emitting diodes) have advantages such as long life and low power consumption, in recent years, illumination devices that use LEDs as light sources instead of incandescent bulbs and fluorescent lamps have been developed.

  FIG. 8A is a plan view of the conventional lighting device 101 viewed from the light emitting direction, and FIG. 8B is a partial cross-sectional view of the lighting device 101. As shown in FIG. 8A and FIG. 8B, the illuminating device 101 includes seven light emitting portions 104 arranged in a close-packed cubic lattice on the emission surface covered with the transmission unit 103. In addition, one LED 108 is mounted inside each light emitting unit 104.

  More specifically, as shown in FIG. 8B, the light emitting unit 104 is formed at a position facing one LED 108, the reflecting surface 1031 formed on the inner surface of the transmission unit 103, and the LED 108. And an illumination lens 1032. The LED 108 is mounted on the LED substrate 107. The reflection surface 1031 and the illumination lens 1032 are integrally formed as part of the transmission unit 103. The reflection surface 1031 is formed on the inner surface of the transmission unit 103 so as to surround the LED 108, and reflects light from the LED 108 in a direction toward the light emitting unit 104 (a direction away from the LED 108). The illumination lens 1032 is formed in a convex shape toward the LED 108 so as to reduce the directivity of light from the LED 108.

  Thereby, the illuminating device 101 becomes a planar light source that emits light substantially uniformly when viewed from a remote position. A configuration similar to that of the lighting device 101 is disclosed in Patent Document 1, for example.

JP 2004-134319 A (published April 30, 2004)

  However, in the related art as described above, there is a problem in that when a plurality of types of lighting devices having different brightnesses are manufactured, it is not possible to make common parts constituting the lighting device.

  The output (brightness) of the lighting device depends on the number of LEDs used. For example, the lighting device 101 shown in FIG. 8A uses seven LEDs. However, when manufacturing a lighting device having a larger output than the lighting device 101, it is necessary to increase the number of light emitting portions 104 for providing the LEDs. There is. Therefore, the transmission unit 103 used for the lighting device 101 cannot be used as it is for a lighting device with a higher output.

  Moreover, when manufacturing a lighting device having a smaller output than the lighting device 101, the number of LEDs used in the entire device is reduced by designing the lighting device 101 so that LEDs are not mounted on some of the light emitting units 104. Can be considered. However, in this case, light is not emitted from the light emitting portion on which the LED is not mounted, and luminance unevenness occurs on the light emitting surface of the lighting device, which is not preferable in appearance. Therefore, even when manufacturing an illumination device having a smaller output than the illumination device 101, it is necessary to newly create an illumination device 101 having a smaller number of light emitting portions, and the transmission unit 103 used for the illumination device 101 is used. I can't.

  Thus, when manufacturing a plurality of types of illumination devices having different brightnesses, it is necessary to use different transmission units for each type of illumination device. Therefore, there has been a problem that it is difficult to reduce the manufacturing cost of the lighting device.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to realize an illumination device capable of manufacturing a plurality of models having different brightnesses at low cost.

  In order to solve the above-described problems, in the illumination device according to the present invention, a plurality of light emitting portions that emit light from a light source are arranged to face a substrate, and the substrate is located at a position corresponding to each light emitting portion. A plurality of mounting regions provided for mounting the light source are arranged, and the light source is mounted in a part of the plurality of mounting regions corresponding to at least one light emitting portion. .

  According to said structure, it has multiple mounting area | regions for mounting a light source in the position of the board | substrate corresponding to each light-projection part. That is, since there are a plurality of mounting areas, the number of light sources to be mounted can be selected within the range of the number of mounting areas. Therefore, by selecting the number of light sources mounted in each of the light emitting units corresponding to the plurality of mounting regions, it is possible to manufacture a plurality of types of lighting devices having different total numbers of light sources to be used.

  Furthermore, by mounting the light source in a part of a plurality of mounting regions corresponding to at least one light emitting part, light is emitted from all the light emitting parts, and a plurality of types having different brightness A lighting device can be manufactured. Further, in the plurality of types of lighting devices, since the number of the light emitting portions is common, a transmission plate for forming the light emitting portions can be shared between the lighting devices. Therefore, it is possible to realize an illumination device that can manufacture a plurality of models with different brightness at low cost.

  In the illuminating device according to the present invention, a part of the plurality of light emitting portions located outside is arranged in an annular shape, and a plurality of mounting regions corresponding to the light emitting portions arranged in an annular shape are arranged in a circumferential direction. It is preferable to arrange along.

  In the illumination device according to the present invention, it is preferable that the light emitting unit includes a lens that controls directivity of light from the light source.

  According to said structure, since the directivity of the light from a light source can be controlled with a lens, the light of uniform distribution can be radiate | emitted just under an illuminating device.

  In the illumination device according to the present invention, it is preferable that the light emitting unit includes a reflecting unit that surrounds the light source and reflects light from the light source in an emitting direction of the light emitting unit.

  According to said structure, since a reflection part reflects the light from a light source in the emission direction of a light-projection part, the utilization efficiency of light can be improved.

  In the illuminating device according to the present invention, it is preferable that the light emitting unit includes the same number of the lenses as the plurality of mounting regions corresponding to the light emitting unit, and each lens and each mounting region face each other. .

  According to said structure, since the light source and the lens are arrange | positioned facing also in the light emission part in which multiple light sources are mounted, the brightness | luminance of the whole light emission surface of an illuminating device can be made further uniform.

  In the illuminating device according to the present invention, it is preferable that the light emitting section includes a diffuse reflector as the reflecting section.

  According to the above configuration, the diffuse reflection plate diffusely reflects the light from the light source, so that even when no lens is provided in the light emitting part, uniform light can be emitted from the light emitting part at a wide angle. .

  In the illumination device according to the present invention, the light source is preferably an LED.

  According to said structure, a long-life and low power consumption illuminating device is realizable.

  As described above, in the illumination device according to the present invention, a plurality of light emitting portions that emit light from a light source are arranged to face the substrate, and the light source is positioned at the position of the substrate corresponding to each light emitting portion. Since a plurality of mounting areas provided for mounting the light source are arranged and the light source is mounted in a part of the plurality of mounting areas corresponding to at least one light emitting portion, a plurality of models having different brightness It is possible to realize an illumination device that can be manufactured at low cost.

It is a perspective view which shows the illuminating device which concerns on embodiment of this invention. It is a disassembled perspective view of the illuminating device shown in FIG. (A) is a side view which shows the illuminating device shown in FIG. 1, (b) is sectional drawing which shows the said illuminating device, (c) is an expanded partial sectional view of the said illuminating device. It is a perspective view which shows the permeation | transmission unit used for the said illuminating device, (b) is the elements on larger scale of the said permeation | transmission board. (A) is the perspective view which shows the transmissive unit and LED of 150 type illuminating device, (b) is the top view which looked at the said illuminating device from the light-projection direction, (c) is 100 type | mold. It is the perspective view which shows the permeation | transmission unit and LED of an illuminating device, (d) is the top view which looked at the said illuminating device from the light-projection direction, (e) is the transmissive unit and LED of 60 type illuminating device. It is a perspective view shown, (f) is the top view which looked at the said illuminating device from the light-projection direction. It is a top view which shows the surface of the LED board in which LED is mounted. (A) is sectional drawing which shows the structure of the light emission part which concerns on the modification of embodiment of this invention, (b) is the structure of the light emission part which concerns on the other modification of embodiment of this invention. It is sectional drawing shown. (A) is the top view which looked at the conventional illuminating device from the light emission direction, (b) is the fragmentary sectional view of the said illuminating device.

  An embodiment of the present invention will be described below with reference to FIGS.

(Configuration of lighting device)
FIG. 1 is a perspective view showing a lighting device 1 according to the present embodiment. The illuminating device 1 is an illuminating device used as a downlight, for example, and is configured by fitting a transmission unit 3 in a cylindrical housing 2. The transmission unit 3 is formed with a plurality of light emitting portions 4 that emit light. An attachment spring 5 for attaching the lighting device 1 to a ceiling or the like is provided at the edge of the annular opening of the housing 2.

  FIG. 2 is an exploded perspective view of the lighting device 1 viewed from different angles. As shown in FIG. 2, the lighting device 1 includes a housing 2, a transmission unit 3, a mounting spring 5, a reflection sheet 6, an LED board 7, an LED (light source) 8, a circuit board 10, an insulating sheet 11, a terminal angle 12, A power terminal block 13, a cover 14, and a dimming terminal block 15 are provided. The transmission unit 3, the reflection sheet 6, and the LED substrate 7 are overlapped in this order and fitted into the housing 2. A plurality of LEDs 8 that are light sources of the lighting device 1 are mounted on the LED substrate 7, and an opening 6 a is formed at a position facing the LEDs 8 of the reflection sheet 6.

  A circuit for controlling the driving of the LED 8 is mounted on the circuit board 10. The circuit board 10 is attached to the terminal angle 12 via the insulating sheet 11. The power supply terminal block 13 has a power supply terminal for supplying power from the outside. The light control terminal block 15 has a light control terminal for supplying a light control signal from the outside. The cover 14 is attached to close the opening of the housing 2 after the terminal angle 12 to which the circuit board 10, the power supply terminal block 13 and the dimming terminal block 15 are attached is attached to the housing 2. The attachment spring 5 is used for fixing the lighting device 1 to an installation hole provided in a ceiling or a wall.

  FIG. 3A is a side view showing the lighting device 1. As shown in the figure, the terminal angle 12 is inserted into the side surface of the housing 2 with the power terminal block 13 and the dimming terminal block 15 attached, and covers the opening of the housing 2. 14 is attached.

  FIG. 3B is a cross-sectional view showing the lighting device 1. As shown in the figure, one or two LEDs 8 are mounted on each light emitting portion 4. A more detailed configuration of the light emitting section 4 is shown in FIG.

  FIG.3 (c) is an expanded sectional view of the broken-line circle frame part of FIG.3 (b). As shown in FIG. 3C, the light emitting portion 4 corresponds to each of the two LEDs 8, the reflecting surface (reflecting portion) 31 formed on the inner surface of the light emitting portion 4, and the two LEDs 8. It has two illumination lenses (lenses) 32a and 32b formed at positions. The two LEDs 8 are respectively mounted on the mounting areas 7 a and 7 b of the LED substrate 7. That is, the light emitting unit 4 has two mounting areas for mounting the LEDs 8.

  The reflection surface 31 and the illumination lenses 32 a and 32 b are integrally formed as a part of the light emitting portion 4 formed in the transmission unit 3. The reflection surface 31 is formed so as to surround the two LEDs 8, and reflects light from the two LEDs 8 toward the emission direction of the light emitting unit 4. Thereby, the utilization efficiency of the light from LED8 can be improved.

  Each of the illumination lenses 32a and 32b is formed in a convex shape toward the two LEDs 8, and constitutes a lens array in which the two lenses are combined. The illumination lenses 32a and 32b condense the light from the LEDs 8 arranged in the arrangement regions of the opposing light emitting portions 4, and control the light of the LEDs 8 to a desired light distribution angle and emit the light from the emission surface 41. . In the present embodiment, the illumination lenses 32a and 32b emit light from the emission surface 41 while controlling the light from the LED having a light distribution angle of 120 ° to the light distribution of 80 ° as the LED 8. The light distribution angle of the LED 8 to be used is not limited to 120 °, and an LED with a wider light distribution angle may be used, or an LED with strong directivity may be used. Further, the control of the light distribution angle by the illumination lens is not limited to 120 °, and a configuration in which the light distribution angle is further reduced may be used, or a lens for widening the light distribution may be used.

  In FIG. 3C, the LED 8 is mounted on both the mounting areas 7a and 7b, but the LED 8 can be mounted on only one of the mounting areas 7a and 7b. In this case, the mounting area where the LED 8 is not mounted faces the illumination lens. In other words, the light emitting unit 4 has the same number of illumination lenses as the number of mounting regions, and each illumination lens and each mounting region are opposed to each other.

  In addition, a reflective sheet 6 that reflects light from the two LEDs 8 is superimposed on the surface of the LED substrate 7. Since the reflection sheet 6 reflects the light from the two LEDs 8 toward the light emitting portion 4, the light use efficiency can be further increased. Further, the back surface of the LED substrate 7 is in contact with the housing 2. Thereby, the heat generated by the LED 8 is conducted to the housing 2 and is radiated from the side surface of the housing 2. Thus, the housing | casing 2 functions also as a heat sink.

(Configuration of transmission unit)
Next, the configuration of the transmission unit 3 will be described.

  FIG. 4A is a perspective view showing the transmission unit 3, and FIG. 4B is a partially enlarged view of the light emitting portion 4 formed in the transmission unit 3. In FIG. 4A, the back side (z-axis direction) is the light emission direction. As shown in the figure, the transmissive unit 3 has seven light emitting portions 4 formed in a convex shape, and the inner side surface of each light emitting portion 4 (convex portion) serves as a reflective surface 31. ing. In addition, a cylindrical recess is formed at the tip of the light emitting portion 4, and the two illumination lenses 32 a and 32 b are located in the recess corresponding to the mounting regions 7 a and 7 b of the LED substrate 7. Is formed. That is, the side surface of each light emitting portion 4 functions as an internal reflection mirror, and the reflection surface 31 and the illumination lenses 32a and 32b are integrated.

  In a state where the transmission unit 3 is fitted in the lighting device 1, as shown in FIG. 4B, the two LEDs 8 are located inside the opening of the recess. In addition, since the two LEDs 8 are opposed to the illumination lenses 32a and 32b, the light distribution from the two LEDs 8 can be controlled. As described above, in the present embodiment, the proof lenses 32a and 32b are controlled so as to narrow the light distribution of the LED 8 from 120 ° to 80 °. In FIG. 4B, the upper side (z-axis direction) is the light emission direction.

  As described above, in the lighting device 1, each light emitting unit 4 has two mounting regions for mounting the LEDs 8, so that a maximum of two LEDs 8 can be mounted on one light emitting unit 4. It has become. Thereby, by selecting the number of mounted LEDs 8 in each light emitting section 4, it is possible to manufacture a plurality of types of lighting devices in which the total number of LEDs 8 used is different.

  Further, by mounting at least one LED 8 on each light emitting portion 4, that is, by selecting either 1 or 2 as the number of LEDs 8 to be mounted on each light emitting portion 4, the same transmission unit 3. Can be used to manufacture a plurality of types of illumination devices having different brightness. Further, since the light is emitted from all the light emitting sections 4, it is possible to realize an illumination device capable of manufacturing a plurality of models with uniform brightness and different brightness on the entire light emitting surface at a low cost.

(Specific example of transmission unit)
As a specific example, FIG. 5 shows three types of lighting devices having brightness of 150, 100 and 60 types.

  FIG. 5A is a perspective view showing the transmission unit 3 and the LED 8 of the 150-type illumination device 1a, and FIG. 5B is a plan view of the illumination device 1a as seen from the light emitting direction. In the illumination device 1a, seven light emitting portions 4 are arranged in a close-packed cubic lattice shape. Two LEDs 8 are mounted on each of the light emitting sections 4, and 14 LEDs 8 are used in the entire apparatus. The LEDs 8 corresponding to the outer six light emitting portions 4 are arranged along the circumferential direction. As described above, when the LEDs 8 are arranged along the circumferential direction, the heat radiation pattern sheet is moved toward the center of the transmission unit 3 so that the wiring of each LED 8 is pulled out from the outside, and the 12 LEDs 8 on the outside are arranged. Can be used in common.

  FIG.5 (c) is a perspective view which shows the permeation | transmission unit 3 and LED8 of 100 type illuminating device 1b, FIG.5 (d) is the top view which looked at the illuminating device 1b from the light-projection direction. In the illuminating device 1b, two LEDs 8 are mounted on the three light emitting sections 4, and one LED 8 is mounted on the four light emitting sections 4, and ten LEDs 8 are used in the entire apparatus.

  FIG.5 (e) is a perspective view which shows the permeation | transmission unit 3 and LED8 of 60 type illuminating device 1c, and FIG.5 (f) is the top view which looked at the illuminating device 1c from the light-projection direction. In the illuminating device 1c, one LED 8 is mounted on each light emitting portion 4, and seven LEDs 8 are used in the entire device.

  Since none of the illuminating devices 1a to 1c includes the light emitting portion 4 on which the LEDs 8 are not mounted, luminance unevenness does not occur on the light emitting surface. For example, in the lighting device 1b, the light emitting unit 4 on which one LED 8 is mounted and the light emitting unit 4 on which two LEDs 8 are mounted have different luminances of emitted light, but when viewed from a certain distance from each other. The luminance of the light emitting surface looks almost uniform as a whole. Therefore, there is no problem in appearance in normal use.

  Moreover, the illuminating devices 1 a to 1 c are manufactured using the same transmission unit 3. For this reason, it becomes possible to reduce manufacturing cost compared with the case where a different transmission unit is used for each type of lighting device.

  In addition, in the light emission part 4 in which one LED8 was mounted, the position of LED8 has shifted | deviated from the center of the exit. On the other hand, in the light emission part 4, since the illumination lens 32 is provided in the position which opposes each LED8, a uniform angle and wide light can be radiate | emitted from the light emission part 4. FIG.

  As described above, in the present embodiment, by selecting either 1 or 2 as the number of LEDs 8 mounted on each light emitting unit 4, a plurality of types of illuminations having different brightness using the same transmission unit 3 are used. The device can be manufactured.

(LED board wiring pattern)
FIG. 6 is a plan view showing the surface of the LED substrate 7. As shown in the figure, seven light emitting portions 4 are arranged in a close-packed cubic lattice, and twelve mounting regions 7a corresponding to the outer light emitting portions 4 out of the seven light emitting portions 4. , 7b are arranged along the circumferential direction. Thereby, the wiring pattern 7c for supplying power to the LEDs 8 (not shown in FIG. 6) mounted on the outer mounting regions 7a and 7b can be continuously formed in an annular shape along the outer periphery of the LED substrate 7. . Thereby, the wiring pattern 7c can be formed easily.

  In addition, the LED substrate 7 has a large number of through holes 7d. The heat conduction between the front and back of the LED substrate 7 can be promoted by the through hole 7d. Furthermore, since the through holes 7d are provided closer to the region closer to the LEDs 8, the heat generated by the LEDs 8 can be more efficiently conducted to the back surface of the LED substrate 7. Further, the through hole 7d can be used for removing air bubbles when a heat dissipation sheet (not shown) is pasted.

(Modification of light emitting part)
Next, a modified example of the configuration of the light emitting unit will be described with reference to FIG. In the above description, each light emitting portion 4 has a configuration in which the reflecting surface 31 and the illumination lenses 32a and 32b are integrally formed, but the present invention is not limited to this.

  Fig.7 (a) is sectional drawing which shows the structure of the light-projection part 4a which concerns on the modification of this embodiment. The light emitting part 4 a includes two LEDs 8, a diffuse reflector 16 and a cover 17. That is, the light emission part 4a is a structure provided with the diffuse reflection board 16 as a reflection board instead of the lens for illumination. The diffuse reflection plate 16 diffusely reflects the light from the LED 8 so that uniform light can be emitted at a wide angle from the light emitting portion 4a.

  FIG. 7B is a cross-sectional view illustrating a configuration of a light emitting unit 4b according to another modification of the present embodiment. The light emitting part 4 b includes two LEDs 8, a specular reflector 18 and an illumination lens 19. That is, in the light emission part 4b, the reflecting plate and the illumination lens are formed separately.

  In the light emitting portions 4a and 4b, one or two LEDs 8 can be mounted. Moreover, in the light emission part 4b shown in FIG.7 (b), it is good also as a structure which replaced the specular reflection board 18 with the diffuse reflection board 16 shown to Fig.7 (a). Further, an illumination lens 1032 shown in FIG. 8B may be used as the illumination lens.

  In the above description, each light emitting unit is configured to mount a maximum of two LEDs. However, the number of LEDs that can be mounted on one light emitting unit is not limited to this. For example, the maximum number of LEDs that can be mounted on each light emitting unit may be three or more. Further, in the above embodiment, the number of the arrangement regions of the light emitting portions of the transmissive unit is all two, but only a part of the light emitting portions can be mounted with a plurality of LEDs, and other light can be mounted. The emitting unit may be configured to be able to mount one LED. That is, the number of the arrangement regions included in each of the light emitting units may not be the same. Further, in the above description, the seven light emitting portions are formed in the transmission unit. However, the number of the light emitting portions formed in the transmission unit is not limited to this, and a plurality other than seven may be used. One may be sufficient.

  Moreover, although this embodiment demonstrated the illuminating device which uses LED as a light source, the light source of an illuminating device is not limited to LED, You may use EL (Electro Luminescence) etc. as a light source.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  The present invention is particularly suitable for an embedded illumination device (such as a downlight) that needs to prevent outgoing light from spreading so much at a high installation. In addition, the present invention is not limited to an embedded illumination device, and can be applied to general illumination devices (straight type, square type, etc.) that require a solid element as a light source and light distribution to be adjusted.

DESCRIPTION OF SYMBOLS 1 Illuminating device 1a Illuminating device 1b Illuminating device 1c Illuminating device 2 Housing 3 Transmission unit 4 Light emitting part 4a Light emitting part 4b Light emitting part 5 Mounting spring 6 Reflective sheet 6a Opening 7 LED substrate 7a Mounting area 7b Mounting area 8 LED ( light source)
DESCRIPTION OF SYMBOLS 10 Circuit board 11 Insulation sheet 12 Terminal angle 13 Power supply terminal block 14 Cover 15 Light control terminal block 16 Diffuse reflecting plate (reflection part)
17 Cover 18 Specular reflector (reflector)
19 Lighting lens (lens)
31 Reflective surface (reflective part)
32 Lens for illumination (lens)
32a Lens for illumination (lens)
32b Lighting lens (lens)
41 Outgoing surface

Claims (7)

A plurality of light emitting portions for emitting light from the light source are arranged facing the substrate,
A plurality of mounting areas provided for mounting the light source are arranged at positions of the substrate corresponding to each light emitting portion,
An illumination device, wherein the light source is mounted in a part of a plurality of mounting regions corresponding to at least one light emitting portion. Of the plurality of light emitting portions, a part located outside is arranged in an annular shape,
The lighting device according to claim 1, wherein the plurality of mounting regions corresponding to the light emitting units arranged in a ring shape are arranged along a circumferential direction.   The illumination device according to claim 1, wherein the light emitting unit includes a lens that controls directivity of light from the light source. The light emitting part is
The lighting device according to claim 1, further comprising a reflection unit that surrounds the light source and reflects light from the light source in an emission direction of the light emission unit. The light emitting portion includes the same number of lenses as a plurality of mounting regions corresponding to the light emitting portion,
The lighting device according to claim 3, wherein each lens and each mounting region face each other.   The lighting device according to claim 4, wherein the light emitting unit includes a diffuse reflector as the reflecting unit.   The lighting device according to claim 1, wherein the light source is an LED.