JP5019218B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device, and more particularly to a lighting device using LEDs.

  As a lighting device, a lighting device using a cold cathode tube is known. Since the cold cathode tube has low directivity, the range in which light can be irradiated is relatively wide. Therefore, a plurality of directions can be brightly illuminated simultaneously with one cold cathode tube. On the other hand, an LED (Light-Emitting Diode) has high directivity, and thus the range in which light can be irradiated is relatively narrow. Therefore, it is difficult to illuminate a plurality of directions simultaneously with one LED.

  As an application example of a lighting device using a cold cathode tube, there is a lighting device for a slot machine. Since the illuminating device has low directivity, it is possible to simultaneously illuminate two directions, that is, the surface portion (design portion) of the reel of the slot machine and the decorative portion of the front panel of the slot machine.

  FIG. 1 is a schematic front view showing a general slot machine. In the slot machine 101, a window 104 is opened so that three types of symbols of the internal reel 103 can be seen vertically. The player inserts a coin into the coin insertion slot 105 and pushes the lever 106. Thereby, the three reels 103 rotate. Thereafter, the player presses the stop button 107 to stop the three reels 103 respectively. At this time, if the symbols displayed on the window 104 are ready, the slot machine 101 pays out coins. In addition, a decorative plate 102 on which a big bonus symbol and a regular bonus symbol are described is arranged on the upper portion of the window 104.

  2 and 3 are schematic views showing general arrangement locations of the reel lighting device in the slot machine of FIG. FIG. 2 shows a state in which the front cover 101b of the slot machine 101 is opened. The rear surface of the front cover 101b and the front surface of the slot machine main body 101a are shown. The reel lighting device 108 is generally disposed on the back surface of the decorative plate 102. FIG. 3 is a sectional view showing the positional relationship among the decorative plate 102, the reel 103, the window 104, and the reel illumination device 108 in a state where the front cover 101b is closed. In the case of the reel illumination device 108 using a cold cathode tube, the light 109 a of the reel illumination device 108 can simultaneously illuminate the surface of the reel 103 and the back surface of the decorative plate 102. On the other hand, at the same time, the light 109b of the reel lighting device 8 illuminates the inside of the slot machine main body 101a that is not visible to the player. This light 109b can be said to be excessive light that illuminates unnecessary portions.

  When a cold cathode tube is used as a lighting device, it is considered that there is a high environmental risk because the cold cathode tube uses mercury. In addition, a dangerous inverter circuit that generates a high voltage is required. Furthermore, as described above, it is impossible to suppress light in other directions while irradiating light in a desired direction, and it can be said that energy consumption is wasted because there is excess light that illuminates unnecessary portions. A technique for solving these problems is desired.

  As a method for solving these problems, it is conceivable to use a lighting device using LEDs. Japanese Unexamined Patent Application Publication No. 2002-197901 discloses a linear illumination technique using LEDs. This LED lighting apparatus includes a translucent tube, and a substrate that is disposed inside the translucent tube and has a surface-mounted LED mounted thereon. This LED lighting apparatus arrange | positions LED on a board | substrate on a straight line. However, in this case, since the directivity of light emitted from the LED is strong, unevenness of light is likely to occur, and it is considered difficult to obtain uniform light in the substrate direction.

  Japanese Patent Laid-Open No. 2006-080386 discloses a technique for realizing a linear light source by arranging LEDs on both ends of a tubular main body. The light source includes at least a tubular light source body, a light emitting element provided at an opening end of the light source body, and a light conversion layer formed on an inner peripheral surface or an outer peripheral surface of the light source main body. The light conversion layer receives light from the light emitting element and emits converted light having a wavelength longer than the wavelength of the light. In this case, it is considered that the problem of light unevenness can be solved. However, the LED is not arranged to face the surface to be irradiated. Therefore, a larger light refraction is required inside the tubular light source body, and a high cost is required for the super-luminance LED light source and the optical member that efficiently refracts light greatly.

  There is a demand for an illuminating device that can irradiate light to a desired region in a desired direction with less unevenness without using a dangerous inverter circuit with less environmental risk. There is a need for an illuminating device that uses an LED that is a point light source with a single direction of light as illumination and can irradiate light in a desired region in a desired direction with less unevenness.

JP 2002-197901 A JP 2006-080386 A

  An object of the present invention is to provide an illuminating device that can irradiate a desired region in a plurality of directions with less unevenness without using a dangerous inverter circuit with less environmental risk. is there.

  Another object of the present invention is to provide an illuminating device that uses an LED, which is a point light source with a single direction of light, as illumination, and can irradiate light to a desired region in a plurality of directions with less unevenness. It is to provide.

  Still another object of the present invention is to provide an illuminating device that can irradiate two directions of a decorative part on a reel for a slot machine and a reel of a slot machine front panel with little unevenness.

  Another object of the present invention is to provide an illuminating device capable of suppressing spot-like reflection on the reel surface of an LED which is a point light source.

  These objects and other objects and benefits of the present invention can be easily confirmed by the following description and the accompanying drawings.

  Hereinafter, means for solving the problem will be described using the numbers and symbols used in the best mode for carrying out the invention. These numbers and symbols are added in parentheses in order to clarify the correspondence between the description of the claims and the best mode for carrying out the invention. However, these numbers and symbols should not be used for the interpretation of the technical scope of the invention described in the scope of patent claims.

  The illumination device of the present invention includes a substrate (10), a plurality of LEDs (11), a first diffusion plate (13), a reflection plate (12), and a second diffusion plate (14). Several LED (11) is arrange | positioned on the board | substrate (10). The first diffusion plate (13) is provided in the irradiation direction of the plurality of LEDs (11). The second diffusion plate (14) is provided in a first direction different from the irradiation direction. The reflection plate (12) is provided at a position facing the second diffusion plate (14) across the plurality of LEDs, and reflects the light of the plurality of LEDs (11).

  In the illumination device, each of the plurality of LEDs (11) has a directivity angle such that a part of the light of each of the plurality of LEDs (11) facing the irradiation direction is directly incident on the reflecting plate (12). Have.

  In the lighting device, the first diffusion plate (13) diffuses the light of each of the plurality of LEDs (11) that passes through the first diffusion plate (13) into a shape extending in the longitudinal direction of the substrate (10). To do. The second diffusion plate (14) diffuses the reflected light of each of the plurality of LEDs (11) that passes through the second diffusion plate (14) into a shape extending in the longitudinal direction of the substrate (10).

  In the illumination device, the irradiation direction and the first direction are orthogonal to each other.

  In the above illumination device, the reflector (12) has a curved surface such that the reflected light of the plurality of LEDs (11) is directed in the first direction.

  According to the present invention, it is possible to irradiate light to a desired region in a plurality of directions with less unevenness without using a dangerous inverter circuit with less environmental risk.

  Hereinafter, embodiments of a lighting device according to the present invention will be described with reference to the accompanying drawings. FIG. 4 is a schematic assembly diagram showing a configuration in the embodiment of the illumination device of the present invention. The lighting device 8 includes a substrate 10, a plurality of LEDs 11, a reflection plate 12, a first diffusion plate 13, a second diffusion plate 14, and a reinforcing member 15. Here, although eight LEDs 11 are shown as examples, the present invention is not limited to this example, and more or fewer LEDs may be provided depending on the size of the irradiation target.

  The substrate 10 has a substantially rectangular shape. The width in the longitudinal direction (X direction) is determined according to the width of the region to which light is irradiated. You may have the overhang | projection part 10a which arrange | positions the control part 18 (after-mentioned) which controls each LED.

  The plurality of LEDs 11 are exemplified by top-view (top emission type) LEDs, and are linearly arranged on the substrate 10 at predetermined intervals along the longitudinal direction (X direction) of the substrate 10. Arrangement at predetermined intervals is preferable from the viewpoint of suppressing unevenness of light. The light irradiation direction of the LED 11 is basically a direction perpendicular to the surface of the substrate 10 (+ Z direction). Here, the irradiation direction is the direction with the highest light intensity.

  However, as the LED 11, an LED having relatively low directivity is used. That is, the LED 11 has the width of the reflection direction (generally -Y direction; described later) of the first diffusion plate 13 (the width of the short side of the first diffusion plate 13) at the position of the first diffusion plate 13. It has a directivity angle that has a wider area than that. Thereby, a part of the light of the LED 11 can be directly incident on the reflection plate 12 and reflected in the direction of the second diffusion plate 14 (described later). For example, an LED having a directivity angle of 100 ° or more, preferably 120 ° or more, more preferably 150 ° or more is used. Thereby, the light on the wide angle side of the LED 11 is likely to enter the reflector 12.

The reflector 12 has a substantially rectangular shape. One side in the longitudinal direction (X direction) is coupled to one side in the longitudinal direction of the substrate 10. The reflection plate 12 is coupled to the substrate 10 so as to form a predetermined angle (example: 90 °). The reflection plate 12 reflects the light of the plurality of LEDs 11 toward the second diffusion plate 14 coupled to the other side in the longitudinal direction of the substrate 10. The predetermined angle is adjusted so that the reflection direction becomes a desired direction. Here, the reflection direction is a direction substantially parallel to the surface of the substrate 10 (generally -Y direction).

In addition, although the case where the reflecting plate 12 is a plane is shown here as an example, a curved surface (example: concave curved surface ) or a multiple surface obtained by combining a plurality of planes at a certain angle may be used. Also in this case, the curvature of the curved surface, the coupling angle of a plurality of planes, and the predetermined angle are adjusted so that the reflection direction becomes a desired direction. Here, the reflection direction is a direction substantially parallel to the surface of the substrate 10 (generally -Y direction).

  The first diffusion plate 13 is provided in the irradiation direction of the plurality of LEDs 11. The surface of the first diffusion plate 13 is substantially parallel to the surface of the substrate 10. When the light irradiated from the plurality of LEDs 11 passes through the first diffusion plate 13, the light is diffused (scattered and dispersed) into an elliptical shape close to a linear shape. In this case, the major axis direction of the ellipse is the same as the longitudinal direction of the first diffusion plate 13. However, it does not need to be an exact ellipse, and may be any shape that is elongated in a certain direction. Here, including such a shape, it will be referred to as a substantially elliptical shape or a substantially elliptical shape.

The second diffusing plate 14 is provided in the irradiation direction of the reflected light of the reflecting plate 12. The surface of the second diffusion plate 14 is substantially perpendicular to the surface of the substrate 10. However, the relationship with the surface of the substrate 10 may be changed so that the surface of the second diffusion plate 14 is substantially perpendicular to the reflected light depending on the direction of the reflection anti-reflection 12. When the light emitted from the plurality of LED11 1 passes through the second diffusion plate 14, the light is diffused (scattered and dispersed) into a substantially elliptical shape close to a linear shape. In this case, the major axis direction of the substantially ellipse is the same as the longitudinal direction of the diffusion plate 13.

  The reinforcing member 15 is a reinforcing member for stably holding the first diffusion plate 13 and the second diffusion plate 14 with respect to the substrate 10. A reinforcing member 15b substantially perpendicular to the surface of the substrate 10 and a reinforcing member 15a coupled to one side of the reinforcing member 15b and substantially parallel to the surface of the substrate 10 are provided. The reinforcing member 15a has the side opposite to the side connected to the reinforcing member 15b connected to the reflecting plate 12. The reinforcing members 15a and 15b and the reflecting plate 12 are coupled to each other in a substantially U shape when viewed from the X direction. Further, the reinforcing member 15 b is coupled to the substrate 10. The first diffusion plate 13 is attached to the reinforcing member 15a, and the second diffusion plate 14 is attached to the reinforcing member 15b. The reinforcing member 15b can be a translucent plate such as carbonate or acrylic.

  Note that the reinforcing member 15 may be omitted when the first diffusion plate 13 and the second diffusion plate 14 have sufficient strength and are stably coupled to the substrate 10. In that case, the second diffusion plate 14 is stably coupled to the substrate 10, and the first diffusion plate 13 is stably coupled to the second diffusion plate 14.

  The light irradiation direction of the LED 11 and the irradiation direction of the reflected light reflected by the reflecting plate 12 are directed in different directions. In the present embodiment, both directions are substantially perpendicular to each other. Thereby, the illuminating device 8 can simultaneously irradiate a plurality of directions while being a single illuminating device.

  In the illumination device 8 according to the present embodiment, the plurality of LEDs 11 and the first diffusion plate 13, and the reflection plate 12 and the second diffusion plate 14 that reflect the light of the plurality of LEDs 11 are respectively perpendicular to the surface of the substrate 10. It arrange | positions so that light may be irradiated to the direction (-Y direction) parallel to the surface of the board | substrate 10 (+ Z direction). However, the irradiation direction is not limited to these, and can be arbitrarily changed.

  FIG. 5A is a schematic front view showing an irradiation state in the embodiment of the illumination device of the present invention. However, the second diffusion plate 14 is not shown. Here, although the example which has three LEDs 11 is shown, the present invention is not limited to this example, and more LEDs may be provided according to the size of the irradiation target. The LEDs 11 are arranged on the substrate 10 at intervals such that each of the substantially elliptical lights 16 irradiated and diffused by the first diffusion plate 13 are not interrupted. That is, the light of each of the plurality of LEDs 11 transmitted through the first diffusion plate 13 is close to a linear shape extending in the longitudinal direction (X direction) of the substrate 10 at a preset distance D1 from the first diffusion plate 13. They diffuse in a substantially elliptical shape and overlap each other. Thereby, it becomes possible to convert the light of the plurality of LEDs 11 in the direction of the first diffusion plate 13 into a linear and continuous line with less unevenness. The longitudinal direction (X direction) of the substrate 10 is a direction substantially perpendicular to the irradiation direction (+ Z direction).

  FIG. 5B is a schematic top view showing an irradiation state in the embodiment of the illumination device of the present invention. However, the first diffusion plate 13 is not shown. Here, although the example which has three LEDs 11 is shown, the present invention is not limited to this example, and more LEDs may be provided according to the size of the irradiation target. The LED 11 is not limited to the conditions described with reference to FIG. 5A, but the substrate 10 is spaced at intervals such that each of the substantially elliptical light 17 that is irradiated and reflected by the reflector 12 and diffused by the second diffuser 14 is not interrupted. Placed in. That is, the direct light of each of the plurality of LEDs 11 that has passed through the second diffusion plate 14 and the reflected light from the reflection plate 12 are at a distance D2 set in advance from the second diffusion plate 14 in the longitudinal direction (X Are diffused into a nearly elliptical shape extending in the direction) and overlapping each other. Thereby, it becomes possible to convert the light of the plurality of LEDs 11 in the direction of the second diffusion plate 14 and the reflected light thereof into a linear and continuous line with little unevenness. The longitudinal direction (X direction) of the substrate 10 is a direction substantially perpendicular to the irradiation direction (substantially -Y direction).

  In FIG. 5A, the size of the ellipse (major axis d01, minor axis d02) and overlap (d2) are set as follows. That is, the length (d1) in the minor axis direction (substantially oval) in the overlapping portion (S1) of the substantially ellipse is the irradiation object at a position separated by a target distance (distances D1 and D2 to the irradiation object). Is set to be equal to or longer than the length (d1) in the minor axis direction of the irradiation scheduled region (irradiation target region). In addition, the unevenness of the light intensity of a portion that forms a linear shape in the substantially elliptical light that is continuously arranged and that actually contributes to irradiation (rectangular portion S0) is within a predetermined range (example: ± Within 20%). The same applies to FIG. 5B.

  Further, the adjustment of the distance D1 can be performed by, for example, the distance between the LED 11 and the first diffusion plate 13, the characteristics of the LED 11 (example: light intensity, its distribution, directivity angle), the arrangement interval, and the number. In addition, the adjustment of the distance D2 is, for example, based on the distance between the LED 11 and the reflection plate 12 and / or the second diffusion plate 14, the distance between the reflection plate 12 and the second diffusion plate 14, the characteristics of the LED 11, the arrangement interval, and the number. It can be carried out.

  Here, the arrangement | positioning method in this invention of LED11 and the reflecting plate 12 is not limited to arrangement | positioning of FIG. 5A and FIG. 5B. In other words, each of a plurality of substantially elliptical lights (including double the reflected light) from the plurality of LEDs that have passed through the diffusion plate is arranged without interruption and with continuous linear irradiation. It ’s fine.

  Furthermore, it is not necessary for the plurality of LEDs 11 to irradiate light having the same intensity. That is, even if the intensity of light is changed for each LED so that each of a plurality of substantially elliptical lights from a plurality of LEDs that have passed through the diffusion plate has a continuous linear shape with little unevenness. good. By appropriately changing the light intensity in this way, the irradiation device 8 can perform continuous linear irradiation with less unevenness.

  6A and 6B are schematic side views showing the configuration in the embodiment of the illumination device of the present invention. Referring to FIG. 6A, the irradiation direction of LED 11 is downward (+ Z direction). The irradiated light passes through the first diffusion plate 13 and becomes substantially elliptical light 16, which extends in the longitudinal direction (X direction) of the substrate 10 (direction substantially perpendicular to the irradiation direction (+ Z direction)) and mutually. It overlaps linearly. On the other hand, the irradiation direction of the light reflected by the light reflecting plate 12 of the LED 11 is slightly leftward (substantially -Y direction). The irradiated (reflected) light is transmitted through the second diffusion plate 14 to become a substantially elliptical light 17, which is a direction substantially perpendicular to the longitudinal direction (X direction) (irradiation direction (approximately −Y direction) of the substrate 10. ) And overlap each other linearly.

  The control unit 18 is electrically connected to the plurality of LEDs 11 and electrically controls their operations (lighting and extinguishing). The control part 18 is provided on the board | substrate 10 in the back surface (surface opposite to the surface which mounts LED) of the board | substrate 10, and its overhang | projection part 10a. However, the present invention is not limited to this example. For example, it may be installed under the overhanging portion 10a (FIG. 6A, control unit 18a), or may be provided on the back surface of only the substrate 10 without the overhanging portion 10a (FIG. 6B, control unit 18b). In the case of the arrangement of the control unit 18a, it is preferable because a cooling unit can be secured more widely on the back surface of the LED mounting portion of the substrate 10.

  Next, a slot machine to which the illumination device of the present invention is applied will be described. The slot machine 1 is not the illumination device 108 using a cold cathode tube as an illumination device, but includes the illumination device 8 using the LED of the present invention, and the slot machine 101 described in FIGS. The same. That is, the slot machine 1 includes a front cover 1b, a slot machine main body 1a, a decorative plate 2, a reel 3, a window 4, a coin slot 5, a lever 6, a stop button 7, and a lighting device 8. However, the front cover 1b, the slot machine main body 1a, the decorative plate 2, the reel 3, the window 4, the coin slot 5, the lever 6, and the stop button 7 are the front cover 101b, the slot machine main body 101a, the decorative plate 102, and the reel. 103, the window 104, the coin insertion slot 105, the lever 106, and the stop button 107.

  FIG. 7 is a schematic partial sectional view showing a slot machine to which the illumination device of the present invention is applied. FIG. 7 is a sectional view showing the positional relationship among the decorative plate 2, the reel 3, the window 4, and the lighting device 8 with the main body front cover 1b closed. In the case of the lighting device 8 for a reel using LED, the lighting device 8 is directed so that the first diffusion plate 13 in FIG. 4 faces the reel 3 and the second diffusion plate 14 faces the decoration plate 2. Attached to the front cover 1b. At that time, the light 16 directly irradiated from the LED 11 among the light 9 of the illuminating device 8 illuminates the surface of the reel 3 (the surface with the design). On the other hand, the light 17 emitted from the LED 11 and reflected by the reflecting plate 12 illuminates the back surface of the decorative plate 2. That is, it is possible to simultaneously irradiate the front surface of the reel 3 and the back surface of the decorative plate 2 with a single lighting device 8. At this time, since the light 16 and the light 17 are continuous linear light in the longitudinal direction (X direction) of the substrate 10 and have little unevenness, the surface of the reel 3 and the back surface of the decorative plate 2 are uniformly distributed. Can be illuminated with high light. Further, the light of the LED 11 and the reflected light thereof have a certain degree of directivity, and light in a direction different from the irradiation direction is also reflected by the reflecting plate 12, so that excess light that illuminates unnecessary portions. Can be extremely reduced.

  As the second diffusion plate 14, a simple transparent plate may be used when the decorative plate 2 has a sufficient diffusion capability. Alternatively, even if the second diffusion plate 14 is used, it is not necessary to make the light 17 linear and continuous with the second diffusion plate 14 in consideration of the diffusion capability of the decorative plate 2.

  The lighting device of the present invention includes a substrate on which LEDs (for example, top view LEDs) are linearly mounted, a reflecting plate that reflects a part of light from the LEDs in another irradiation direction, light from the LEDs, and The diffuser is disposed at a position facing each irradiation direction of the reflected light and diffuses the light into a substantially elliptical shape close to a linear shape. Thereby, this illuminating device can irradiate simultaneously in two directions. As a result, when this illumination device is applied to a slot machine, it is possible to simultaneously irradiate the front surface of the reel (the surface with the pattern) and the back surface of the decorative surface on the front reel.

  In the illumination device of the present invention, the LEDs are arranged at intervals such that the diffused substantially elliptical light from the LEDs is not interrupted. As a result, it is possible to realize illumination for a linear reel with extremely little unevenness, and it is possible to eliminate dot-like reflection on the reel surface. Further, since the LED is disposed on the opposite side of the reel surface, the reel surface can be efficiently illuminated.

  In the illumination device of the present invention, the LEDs are further arranged at intervals such that each diffused elliptical light from the reflecting plate that reflects a part of the LED light is not interrupted. Thereby, similarly to the reel surface, illumination for the back surface of the linear decorative surface with extremely little unevenness can be realized. Moreover, since LED is arrange | positioned facing the back surface of a decoration surface, it becomes possible to illuminate the back surface of the decoration surface efficiently.

As described above, the illuminating device of the present invention eliminates the need for a dangerous inverter circuit that generates the high voltage required for the cold cathode tube. In addition, a cold cathode tube having a high environmental risk is not required. In other words, it is possible to irradiate light with less unevenness to a desired region in a plurality of directions without using a dangerous inverter circuit with less environmental risk. Also, directivity is used as the illumination of the LED is a point light source in a single direction, it is possible to irradiate light with less unevenness in a desired region of the plurality of directions. That is, the two directions of the decorative portion on the reel of the slot machine reel and the slot machine front panel can be irradiated with little unevenness. At that time, it becomes possible to suppress the dot-like reflection on the reel surface of the LED which is a point light source.

  The present invention is not limited to the embodiments described above, and it is obvious that the embodiments can be appropriately modified or changed within the scope of the technical idea of the present invention.

FIG. 1 is a schematic front view showing a general slot machine. FIG. 2 is a schematic view showing a general location of the reel illumination device in the slot machine of FIG. FIG. 3 is a schematic cross-sectional view showing a general location of the reel illumination device in the slot machine of FIG. FIG. 4 is a schematic assembly diagram showing a configuration in the embodiment of the illumination device of the present invention. FIG. 5A is a schematic front view showing an irradiation state in the embodiment of the illumination device of the present invention. FIG. 5B is a schematic top view showing an irradiation state in the embodiment of the illumination device of the present invention. FIG. 6A is a schematic side view showing the configuration of the lighting device according to the embodiment of the present invention. FIG. 6B is a schematic side view showing another configuration in the embodiment of the illumination device of the present invention. FIG. 7 is a schematic partial sectional view showing a slot machine to which the illumination device of the present invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 Slot machine 1a, 101a Slot machine main body 1b, 101b Front cover 2,102 Decorative plate 3,103 Reel 4,104 Window 5,105 Coin slot 6,106 Lever 7,107 Stop button 8,108 Illuminator 9 , 9a, 9b, 109, 109a, 109b Light 10 Substrate 10a Overhang 11 LED
DESCRIPTION OF SYMBOLS 12 Reflector 13 First diffuser 14 Second diffuser 15 Reinforcing member 15a, 15b, 15 Reinforcing member

Claims (3)

A substrate,
A plurality of LEDs disposed on the substrate along a longitudinal direction of the substrate and having an irradiation direction perpendicular to a surface of the substrate ;
A first diffusion plate provided in the irradiation direction of the plurality of LEDs;
A second diffusion plate provided in a first direction orthogonal to the irradiation direction;
A reflection plate provided at a position facing the second diffusion plate across the plurality of LEDs, and reflecting the light of the plurality of LEDs ;
The first diffusion plate diffuses the light of each of the plurality of LEDs that passes through the first diffusion plate into an elliptical shape extending in the longitudinal direction of the substrate rather than the short direction of the substrate,
The second diffusion plate diffuses the reflected light of each of the plurality of LEDs transmitted through the second diffusion plate into an elliptical shape extending in the longitudinal direction of the substrate rather than in a direction perpendicular to the surface of the substrate. lighting device that. The lighting device according to claim 1.
Each of the plurality of LEDs has a directivity angle such that a part of light of each of the plurality of LEDs facing the irradiation direction is directly incident on the reflection plate. The lighting device according to claim 1 or 2 ,
The said reflecting plate has a curved surface that the reflected light of the light of these LED goes to the said 1st direction.

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