JP5019219B2 - 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 interpreting the technical scope of the invention described in the claims.

  The lighting device of the present invention includes a substrate (10), a plurality of first LEDs (11), a plurality of second LEDs (12), a first diffusion plate (13), and a second diffusion plate (14). To do. The plurality of first LEDs (11) are linearly arranged on the substrate (10). The plurality of second LEDs (12) are linearly arranged on the substrate (10). The first diffusion plate (13) is provided in the first irradiation direction of the plurality of first LEDs (11). The 2nd diffuser plate (14) is provided in the 2nd irradiation direction of several 2nd LED (12). The first irradiation direction is different from the second irradiation direction.

  In the illumination device, the first diffusion plate (13) has a shape in which the light of each of the plurality of first LEDs (11) transmitting through the first diffusion plate (13) extends in the longitudinal direction of the substrate (10). Spread. The second diffusion plate (14) diffuses the light of each of the plurality of second LEDs (12) that passes through the second diffusion plate (14) into a shape extending in the longitudinal direction of the substrate (10).

  In the illumination device, each of the plurality of second LEDs (12) is disposed between each of the plurality of first LEDs (11).

  In the illumination device, each of the plurality of second LEDs (12) is disposed adjacent to each of the plurality of first LEDs (11).

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

  In the illumination device, each of the plurality of second LEDs (12) is provided on the auxiliary substrate (10b) disposed on the substrate (10).

  In said illuminating device, each terminal of several 2nd LED (12) is provided in the position different from each terminal of several 1st LED (11).

  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 first LEDs 11, a plurality of second LEDs 12, a first diffusion plate 13, a second diffusion plate 14, and a reinforcing member 15. Here, an example of four first LEDs 11 and four second LEDs 12 is shown, but 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 first LEDs 11 are exemplified by top-view (top emission type) LEDs, and are linearly arranged on the substrate 10 along the longitudinal direction (X direction) of the substrate 10 at predetermined intervals. Arrangement at predetermined intervals is preferable from the viewpoint of suppressing unevenness of light. The light irradiation direction of the first LED 11 is a direction perpendicular to the surface of the substrate 10 (+ Z direction). Here, the irradiation direction is the direction with the highest light intensity.

  The plurality of second LEDs 12 are exemplified by side-view (side-emitting 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 second LED 12 is a direction parallel to the surface of the substrate 10 (−Y direction). Here, it is preferable that each of the plurality of second LEDs 12 is disposed between each of the plurality of first LEDs 11, that is, the first LEDs 11 and the second LEDs 12 are alternately disposed. This is because the area between the LEDs can be used effectively.

  The first diffusion plate 13 is provided in the irradiation direction of the plurality of first LEDs 11. The surface of the first diffusion plate 13 is substantially parallel to the surface of the substrate 10. When the light emitted from the plurality of first 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 diffusion plate 14 is provided in the irradiation direction of the plurality of second LEDs 12. The surface of the second diffusion plate 14 is substantially perpendicular to the surface of the substrate 10. When light emitted from the plurality of second LEDs 12 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. Two reinforcing members 15b and 15c substantially perpendicular to the surface of the substrate 10 and a reinforcing member 15a provided between the reinforcing members 15b and 15c and substantially parallel to the surface of the substrate 10 are provided. The reinforcing members 15a, 15b, and 15c are coupled to each other in a substantially U shape when viewed from the X direction. Further, the reinforcing members 15 b and 15 c are 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 first LED 11 faces the direction different from the light irradiation direction of the second LED 12. 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 lighting device 8 in the present embodiment, the plurality of first LEDs 11 and the first diffusion plate 13, and the plurality of second LEDs 12 and the second diffusion plate 14 are respectively perpendicular to the surface of the substrate 10 (+ Z direction), and The light is radiated in a direction parallel to the surface of the substrate 10 (−Y 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 1st LED11 is shown, this invention is not limited to this example, You may have more LED according to the magnitude | size of irradiation object. The first 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, each light of the plurality of first LEDs 11 transmitted through the first diffusion plate 13 is linearly extended in the longitudinal direction (X direction) of the substrate 10 at a preset distance D1 from the first diffusion plate 13. They are diffused into a nearly elliptical shape and overlap each other. Thereby, it becomes possible to convert the light of the plurality of first LEDs 11 in the direction of the first diffusion plate 13 into a linear and continuous linear shape 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 two 2nd LED12 is shown, this invention is not limited to this example, You may have more LED according to the magnitude | size of irradiation object. The second LEDs 12 are arranged on the substrate 10 at intervals such that each of the substantially elliptical lights 17 irradiated and diffused by the second diffusion plate 14 is not interrupted. That is, the light of each of the plurality of second LEDs 12 transmitted through the second diffusion plate 14 is linearly extended in the longitudinal direction (X direction) of the substrate 10 at a preset distance D2 from the second diffusion plate 14. They are diffused into a nearly elliptical shape and overlap each other. Thereby, it becomes possible to convert the light of the plurality of second LEDs 12 in the direction of the second diffusion plate 14 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 (−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 first LED 11 and the first diffusion plate 13, the characteristics of the first LED 11 (example: light intensity, distribution thereof, directivity angle), the arrangement interval, and the number. Similarly, the adjustment of the distance D2 can be performed by, for example, the distance between the second LED 12 and the second diffusion plate 14, the characteristics, the arrangement interval, and the number of the second LEDs 12.

  6A to 6C are schematic side views showing the relationship between the second LED and the substrate in the embodiment of the illumination device of the present invention. FIG. 6A shows a case where the terminal of the second LED 12 is provided on the side surface. Illustrated in the side view LED. In that case, it can arrange | position to the board | substrate 10 as it is. 6B and 6C show the case where the terminal of the second LED 12 is provided on the lower side. Illustrated in the top view LED. In that case, the terminal can be bent and disposed on the substrate 10 (FIG. 6B), or additionally disposed on the auxiliary substrate 10b disposed perpendicular to the substrate 10 (FIG. 6C). In addition, as 1st LED11, LED (example: top view LED) like FIG. 6B by which the terminal is provided below is used.

  Here, the arrangement | positioning method in this invention of 1st LED11 and 2nd LED12 is not limited to arrangement | positioning of FIG. 5A and FIG. 5B. That is, it is only necessary that each of a plurality of substantially elliptical lights from the plurality of LEDs that have passed through the diffusion plate is arranged so as to be continuous and linear irradiation with little unevenness. For example, an arrangement as shown in FIG. 7 can be considered. FIG. 7 is a schematic top view showing another LED arrangement method in the embodiment of the illumination device of the present invention. In this case, the first LED 11 and the second LED 12 facing different directions are arranged adjacent to each other at substantially the same position. By arranging in this way, the irradiation device 8 can perform continuous linear irradiation with less unevenness. Here, an example in which there are five first LEDs 11 and five second LEDs 12 is shown, but 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. .

  Furthermore, it is not necessary for the plurality of first LEDs 11 to emit 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. The same applies to the plurality of second LEDs 12. By appropriately changing the light intensity in this way, the irradiation device 8 can perform continuous linear irradiation with less unevenness.

  8A and 8B are schematic side views showing the configuration of the embodiment of the illumination device of the present invention. Referring to FIG. 8A, the irradiation direction of the first 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 second LED 12 is leftward (−Y direction). The irradiated light is transmitted through the second diffusion plate 14 to become a substantially elliptical light 17 and extends in the longitudinal direction (X direction) of the substrate 10 (a direction substantially perpendicular to the irradiation direction (−Y direction)). They overlap each other linearly.

  The control unit 18 is electrically connected to the plurality of first LEDs 11 and the plurality of second LEDs 12 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, you may install in the lower side of the overhang | projection part 10a (FIG. 8A, control part 18a), and may provide on the back surface of only the board | substrate 10 without the overhang | projection part 10a (FIG. 8B, control part 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. 9 is a schematic partial sectional view showing a slot machine to which the illumination device of the present invention is applied. FIG. 9 is a sectional view showing the positional relationship among the decorative plate 2, the reel 3, the window 4, and the lighting device 8 in a state where the main body front cover 1b is 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 from the first LED 11 out of the light 9 of the illumination device 8 illuminates the surface of the reel 3 (the surface with the design). On the other hand, the light 17 from the second LED 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. Moreover, since 1st LED11 and 2nd LED12 have directivity, the excessive light which illuminates an unnecessary part can be decreased very much.

  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 illuminating device of the present invention is a substrate in which first LEDs (example: top view LEDs) and second LEDs (example: side view LEDs) are alternately mounted in a straight line, and at positions facing the irradiation directions of the respective LEDs. It is possible to irradiate simultaneously in two directions by providing a diffuser plate that is disposed and diffuses light into a substantially elliptical shape close to a linear shape. Thereby, 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 first LEDs are arranged at intervals such that the diffused substantially elliptical lights from the first LEDs (for example, top view LEDs) are 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 first 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 second LEDs are arranged at intervals such that each diffused substantially elliptical light from the second LED (example: side view LED) 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 2nd 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. Moreover, it is possible to irradiate light with less unevenness to a desired region in a plurality of directions by using an LED which is a point light source with directivity in a single direction as illumination. 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 relationship between the second LED and the substrate in the embodiment of the illumination device of the present invention. FIG. 6B is a schematic side view showing the relationship between the second LED and the substrate in the embodiment of the illumination device of the present invention. FIG. 6C is a schematic side view showing the relationship between the second LED and the substrate in the embodiment of the illumination device of the present invention. FIG. 7 is a schematic view showing another arrangement method of the LEDs in the embodiment of the illumination device of the present invention. FIG. 8A is a schematic side view showing the configuration of the embodiment of the illumination device of the present invention. FIG. 8B is a schematic side view showing another configuration in the embodiment of the illumination device of the present invention. FIG. 9 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 portion 11 First LED
12 Second LED
13 First diffuser plate 14 Second diffuser plate 15 Reinforcement member 15a, 15b, 15c, 15 Reinforcement member

Claims (5)

A substrate,
A plurality of first LEDs arranged linearly along the longitudinal direction of the substrate on the substrate and having a first irradiation direction perpendicular to the surface of the substrate ;
A plurality of second LEDs that are linearly arranged along the arrangement direction of the plurality of first LEDs on the substrate and have a second irradiation direction perpendicular to the first irradiation direction ;
A first diffusion plate provided in the first irradiation direction of the plurality of first 1LED,
And a second diffusion plate provided in the second irradiation direction of the plurality of first 2LED,
The first diffusion plate diffuses the light of each of the plurality of first 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 light of each of the plurality of second 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 second LEDs is disposed between each of the plurality of first LEDs. The lighting device according to claim 1 .
Each of the plurality of second LEDs is disposed adjacent to each of the plurality of first LEDs. In the illuminating device as described in any one of Claims 1 thru | or 3 ,
An auxiliary substrate on which each of the plurality of second LEDs is disposed ;
The auxiliary substrate is an illuminating device provided perpendicular to the surface of the substrate so that light of each of the plurality of second LEDs is transmitted through the second diffusion plate . In the illuminating device as described in any one of Claims 1 thru | or 3 ,
Each terminal of the plurality of second LEDs is provided at a position different from each terminal of the plurality of first LEDs.

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