JP2008186688A - Lighting device and vending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light-emitting diode lighting device reduced in illuminance unevenness in a display space. <P>SOLUTION: The lighting device is provided with a first light-emitting diode unit 201 arranged on the back side at the upper part 101u of a display space 101, a second light-emitting diode unit 202 arranged on the front side at the upper part 101u of the display space 101, and a panel 203 installed on the back face 101 b of the display space 101. The first light-emitting diode unit 201 has a first plurality of light-emitting diodes 301 arranged in a row. The second light-emitting diode unit 202 has a second plurality of light-emitting diodes 302 arranged in a row and a pair of optical reflectors 303 arranged interposing the second plurality of light-emitting diodes 302. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an illumination device using a light emitting diode.

Conventionally, fluorescent lamps have been used for illumination of exhibition spaces such as vending machines. However, such conventionally used lighting devices have been required to have low power consumption or long life due to, for example, an increase in exhibition space. In recent years, lighting devices using light emitting diodes have been developed in response to such demands.
JP 2001-283310 A

  However, unlike a fluorescent lamp, an illumination device using a light emitting diode is close to a point light source, so it is important to reduce unevenness in illumination in the exhibition space. The present invention has been devised in view of such problems, and an object of the present invention is to provide a light-emitting diode illuminating device with reduced illuminance unevenness in an exhibition space.

  The present invention includes a first light emitting diode unit disposed on the back side in the upper part of the exhibition space, and a second light emitting diode unit disposed on the front side in the upper part of the exhibition space. The first light emitting diode unit has a first plurality of light emitting diodes arranged. The second light emitting diode unit has a second plurality of light emitting diodes arranged and a pair of light reflectors arranged with the second plurality of light emitting diodes interposed therebetween.

  The lighting device of the present invention includes a first light emitting diode unit disposed on the back side in the upper part of the exhibition space, and a second light emitting diode unit disposed on the front side in the upper part of the exhibition space. The second light emitting diode unit has a plurality of light emitting diodes arranged and a pair of light reflectors arranged with the plurality of light emitting diodes interposed therebetween. According to the present invention, the uneven illuminance in the exhibition space is reduced by such a configuration.

  Embodiments of the present invention will be described in detail with reference to the drawings.

  The lighting device of the present invention includes a first light emitting diode unit disposed on the back side in the upper part of the exhibition space, and a second light emitting diode unit disposed on the front side in the upper part of the exhibition space.

  Here, taking the vending machine shown in FIG. 1 as an example, the exhibition space in which the illumination device of the present invention is installed will be described. An exhibition space 101 shown in FIG. 1 is a space in which a product sample 103 in a vending machine is placed. FIG. 1 is a front view showing the configuration of the vending machine in the present embodiment.

  The vending machine according to the present embodiment includes an illumination unit 102 that illuminates the exhibition space 101 and a product sample 103 disposed in the exhibition space 101. The vending machine shown in FIG. 1 includes a translucent panel 104 on the front surface of the exhibition space 101. In this embodiment, the translucency of the panel 104 means that at least part of the light generated by the lighting unit 102 can be transmitted.

  (First Embodiment of Illuminating Device) Here, the first embodiment of the illuminating device provided in the illumination unit 102 will be described in detail with reference to FIGS. FIG. 2 is a cross-sectional view illustrating a configuration of the lighting device in the present embodiment. FIG. 3 is a diagram showing the configuration of the upper surface of the exhibition space 101. “Left direction” and “Right direction” in FIG. 2 correspond to “Back direction B” and “Front direction F” of the exhibition space 101. In FIG. 3, “left direction” and “right direction” correspond to “rear direction B” and “front direction F” of the exhibition space 101.

  In the configuration shown in FIG. 2, the lighting device includes a first light emitting diode unit 201 disposed on the back side in the upper portion 101 u of the display space 101 and a second light emitting diode disposed on the front side in the upper portion 101 u of the display space 101. And a light emitting diode unit 202. In the configuration shown in FIG. 2, the panel 203 is provided on the back surface 101 b of the exhibition space 101.

  The first light emitting diode unit 201 illuminates the back surface 103 b of the exhibition space located on the back side of the product sample 103. The second light emitting diode unit 202 illuminates the front surface of the product sample 103. Here, the front surface of the product sample 103 refers to a surface that is directly visible in the viewing direction V in FIG. The back side of the product sample refers to the back side of the product sample 103 in the viewing direction V in FIG. Here, the product sample includes those produced exclusively for display and those actually sold.

  As shown in FIG. 3, the first light emitting diode unit 201 has a plurality of first light emitting diodes 301 arranged. In the configuration shown in FIG. 3, the first plurality of light emitting diodes 301 are arranged in a line in a direction (second direction) perpendicular to the front surface direction (first direction) F. In the present embodiment, the plurality of light emitting diodes 301 are a plurality of light emitting diode lamps each including a light emitting diode element. Another example of the plurality of light emitting diodes 301 is a plurality of light emitting diode elements mounted substantially directly on a substrate.

  A plurality of light emitting diodes 301 (a plurality of light emitting diode lamps) of the first light emitting diode unit 201 include a light emitting diode element that generates ultraviolet light or blue light, and a fluorescent material that emits visible light according to the ultraviolet light or blue light. And.

  Here, the first light-emitting diode unit 201 will be described in detail with reference to FIG. FIG. 5A is a plan view showing the configuration of the first light emitting diode unit 201. FIG. 5B is a cross-sectional view taken along line X-X ′ of the first light emitting diode unit 201 in FIG. The first light emitting diode unit 201 includes a substrate 401 and a plurality of light emitting diode lamps 402 (a plurality of light emitting diodes 301) mounted on the substrate 401. The plurality of light emitting diode lamps 402 include a package 402a, a light emitting diode element 402b mounted on the package 402a, and a phosphor layer 402c. In the configuration shown in FIG. 5, the plurality of light emitting diodes 301 are a plurality of light emitting diode lamps 402 each having a light emitting diode element 402b mounted thereon.

  The plurality of light emitting diode elements 402b generate ultraviolet light or blue light. The phosphor layer 402c includes a fluorescent material that emits visible light in response to ultraviolet light or blue light emitted from the light emitting diode element 402b. The plurality of light emitting diode lamps 402 shown in FIG. 5 emit visible light emitted from the phosphor layer 402c in response to the ultraviolet light generated by the light emitting diode element 402b. In the illuminating device shown in FIG. 5, visible light emitted from the plurality of light emitting diode lamps 402 is white light that is mixed light composed of a plurality of lights.

  As shown in FIG. 3, the second light emitting diode unit 202 has a plurality of second light emitting diode units 302 arranged and a pair of light reflectors 303 arranged with the plurality of light emitting diode units 302 interposed therebetween. is doing. In the configuration shown in FIG. 3, the second plurality of light emitting diodes 302 are arranged in a line in the second direction. In the present embodiment, the plurality of light emitting diodes 302 are a plurality of light emitting diode lamps each including a light emitting diode element. Another example of the plurality of light emitting diodes 302 is a plurality of light emitting diode elements mounted substantially directly on the substrate.

  A plurality of light emitting diodes 302 (a plurality of light emitting diode lamps) of the second light emitting diode unit 202 include a light emitting diode element that generates ultraviolet light or blue light, and a fluorescent material that emits visible light according to the ultraviolet light or blue light. And.

  Here, the second light emitting diode unit 202 will be described in detail with reference to FIG. FIG. 6A is a plan view showing the configuration of the second light emitting diode unit 202. FIG. 6B is a cross-sectional view taken along line X-X ′ of the second light emitting diode unit 202 of FIG. The second light emitting diode unit 202 includes a substrate 501 and a plurality of light emitting diode lamps 502 (a plurality of light emitting diodes 302) mounted on the substrate 501. The plurality of light emitting diode lamps 502 include a package 502a, a light emitting diode element 502b mounted on the package 502a, and a phosphor layer 502c. In the configuration shown in FIG. 6, the plurality of light emitting diodes 302 are a plurality of light emitting diode lamps 502 each mounted with a light emitting diode element 502b.

  The plurality of light emitting diode elements 502b generate ultraviolet light or blue light. The phosphor layer 502c includes a fluorescent material that emits visible light in response to ultraviolet light or blue light emitted from the light emitting diode element 502b. The plurality of light emitting diode lamps 502 shown in FIG. 6 emit visible light emitted from the phosphor layer 502c in response to the ultraviolet light generated by the light emitting diode element 502b. In the lighting device shown in FIG. 6, visible light emitted from the plurality of light emitting diode lamps 502 is white light that is mixed light composed of a plurality of lights.

  As shown in FIG. 3, the second light emitting diode unit 202 in the present embodiment includes a pair of light reflectors 303 arranged with a plurality of light emitting diode lamps 502 arranged therebetween. In the configuration shown in FIG. 6, the pair of light reflectors 303 is provided with a plurality of light emitting diode lamps 502 arranged in a row sandwiched from both sides. Here, in the present embodiment, the pair of optical reflectors includes a case where the optical reflector is composed of a plurality of members as shown in FIG. 3 and a plurality of portions in the integrated optical reflector as shown in FIG. Including the case. The pair of light reflectors is disposed on the back side of the exhibition space 101 with the first light reflector 303f disposed on the front side of the display space 101 with respect to the plurality of light emitting diodes 302 and the plurality of light emitting diodes 302. It consists of a second light reflector 303b.

  The second light reflector 303b has an outer surface 303bo that reflects light emitted from the plurality of light emitting diodes 301 and an inner surface 303bi that reflects light emitted from the plurality of light emitting diodes 302. The second light reflector 303b is provided at a position where light emitted from the plurality of light emitting diodes 301 reaches directly.

  Here, the configuration of the upper surface of the exhibition space 101 will be described in detail with reference to FIGS. The first light emitting diode unit 201 and the second light emitting diode unit 202 are arranged on the upper surface having a first direction which is the front direction F and a second direction perpendicular to the first direction in the exhibition space 101. Are provided in parallel in the direction. 3 and 4, the first light-emitting diode unit 201 and the second light-emitting diode unit 202 are arranged in parallel to the first direction.

  The plurality of light emitting diodes 301 of the first light emitting diode unit 201 and the plurality of light emitting diodes 302 of the second light emitting diode unit 202 are alternately arranged in the second direction. That is, the plurality of light emitting diodes 301 of the first light emitting diode unit 201 and the plurality of light emitting diodes 302 of the second light emitting diode unit 202 are virtual along the virtual reference line R perpendicular to the first direction. Are alternately arranged on the front side and the back side of the reference line R.

  In the present embodiment, the lighting device includes a panel 203 provided on the back surface 101 b of the exhibition space 101. Here, the panel in the present invention refers to a panel that reflects at least a part of the light emitted from the first light emitting diode unit 201.

  The first light emitting diode unit 201 and the second light emitting diode unit 202 in the present embodiment are arranged above a plurality of product samples in the vending machine shown in FIG.

  Here, the function of the illumination device of the present embodiment will be described with reference to FIG.

  The first light emitting diode unit 201 illuminates the back surface portion 101B in the exhibition space 101 (first illumination means). In the configuration shown in FIG. 2, the first illumination means illuminates the back surface 101 b of the exhibition space 101. More specifically, the first light emitting diode unit 201 includes light (1) (2) traveling toward the back surface 101b of the exhibition space 101 and light (3) traveling toward the front surface of the exhibition space 101. Radiate.

  The second light emitting diode unit 202 illuminates the front surface portion 101F in the exhibition space 101 and reflects the light emitted from the first light emitting means 201 in the front direction F of the exhibition space 101 in the rear direction B of the exhibition space 101. (Second illumination means). In the configuration shown in FIG. 2, the second illumination means illuminates the product sample 204. More specifically, the second light emitting diode unit 202 emits light (4) to (6) traveling to the front surface portion 101F in the exhibition space 101. Lights (4) and (6) emitted from the plurality of light emitting diodes 302 of the second light emitting diode unit 202 in the back direction B and the front direction F of the display space 101 are the back side light reflectors of the second light emitting diode unit 202. The light is reflected by the inner surface of 303b and the inner surface of the front-side light reflector 303f, and proceeds to the front surface portion 101F of the exhibition space 101. The light (3) emitted from the first light emitting diode unit 201 in the front direction F of the exhibition space 101 is reflected by the outer surface of the rear light reflector 303b of the second light emitting diode unit 202, and the rear surface of the exhibition space 101. Proceed toward 101b.

  In the exhibition space 101, the light (1) (2) (7) traveling toward the back surface 101b is reflected by the panel 203 and travels in the front direction F of the exhibition space 101 to illuminate the exhibit 204. That is, in the configuration shown in FIG. 2, the panel 203 reflects the light emitted from the first light emitting diode unit 201 (first illumination means) to the back side of the exhibition space 101 to the front side of the display space 101. It has a function.

  As described above, the lighting device according to the present embodiment includes the first light-emitting diode unit 201 disposed on the back side of the upper portion 101u of the exhibition space 101, and the second light-emitting diode unit 202 disposed on the front side. have. The second light emitting diode unit 202 has a plurality of light emitting diodes 302 arranged and a pair of light reflectors arranged with the plurality of light emitting diodes 302 interposed therebetween. The illumination device according to the present embodiment has reduced illuminance unevenness in the exhibition space 101 with such a configuration.

  (Second Embodiment of Lighting Device) Here, a second embodiment of the lighting device of the present invention will be described with reference to FIG. In the illumination device of the present embodiment, the second light emitting diode unit 202 includes a light reflector having an outer surface that is a light scattering surface. In the configuration shown in FIG. 7, the second light emitting diode unit 202 includes a back surface side light reflector (second reflector) 503 b having an outer surface that is a light scattering surface. Other configurations in the illumination device of the present embodiment are the same as the configurations of the illumination device of the first embodiment. In the illumination device according to the present embodiment, the same reference numerals are given to the same components as those in the illumination device according to the first embodiment. In the present embodiment, the back side light reflector 503b of the second light emitting diode unit 202 has an outer surface rougher than the inner surface.

  Here, the function of the lighting apparatus of the present embodiment will be described with reference to FIG. The light (3) radiated from the first light emitting diode unit 201 in the front direction F of the display space 101 is diffusely reflected by the rear light reflector 503b of the second light emitting diode unit 202, and the back direction B of the display space 101 Proceed to (7a) to (7c). That is, the second light emitting diode unit 202 (second lighting unit) emits light emitted from the first light emitting diode unit (first lighting unit) to the front side of the exhibition space 101 on the rear side of the display space 101. It has the function of diffusely reflecting.

  The light (7a) to (7c) irregularly reflected by the second light emitting diode unit 202 toward the back side of the display space 101 is reflected in the front direction F of the display space 101 by the panel 203 provided on the back surface 101b of the display space 101. Then, (9a) to (9c) illuminate the exhibit 204.

  As described above, the illumination device in the present embodiment includes the back-side light reflector (second reflector) 503b having an outer surface that is a light scattering surface. The illumination device according to the present embodiment further reduces illuminance unevenness on the back side of the exhibition space 101 by such a configuration.

  (Third Embodiment of Illuminating Device) Here, a third embodiment of the illuminating device of the present invention will be described with reference to FIG. In the illumination device of the present embodiment, the first plurality of light emitting diodes includes a plurality of light emitting diode lamps 301a and 301b having different illuminance distributions. In the illumination device of the present embodiment, the second plurality of light emitting diodes includes a plurality of light emitting diode lamps 302a and 302b having different illuminance distributions. Other configurations in the illumination device of the present embodiment are the same as the configurations of the illumination device of the first embodiment. In the illumination device according to the present embodiment, the same reference numerals are given to the same components as those in the illumination device according to the first embodiment.

  FIG. 4 is a diagram showing the illuminance distribution of the first light-emitting diode unit 201 in the illumination device of the present embodiment. FIG. 5 is a diagram showing the illuminance distribution of the second light emitting diode unit 202 in the illumination device of the present embodiment.

  In FIG. 4, the illuminance distribution indicated by reference numeral 301 </ b> A is the illuminance distribution of the light emitting diode lamp 301 a in the first light emitting diode unit 201. The illuminance distribution indicated by reference numeral 301 </ b> B is the illuminance distribution of the light emitting diode lamp 301 b in the first light emitting diode unit 201. As shown in FIG. 4, in the present embodiment, the illuminance distribution 301B of the light emitting diode lamp 301b is larger than the illuminance distribution 301A of the light emitting diode lamp 301a, and connects the irradiation distributions 301A of the plurality of light emitting diode lamps 301a. .

  In FIG. 5, the illuminance distribution indicated by reference numeral 302 </ b> A is the illuminance distribution of the light emitting diode lamp 302 a in the second light emitting diode unit 202. The illuminance distribution indicated by reference numeral 302 </ b> B is the illuminance distribution of the light emitting diode lamp 302 b in the second light emitting diode unit 202. As shown in FIG. 5, in this embodiment, the illuminance distribution 302B of the light-emitting diode lamp 302b is larger than the illuminance distribution 302A of the light-emitting diode lamp 302a, and connects the irradiation distributions 302A of the plurality of light-emitting diode lamps 302a. .

  The illumination device according to the present embodiment includes a light emitting diode unit including a plurality of light emitting diode lamps having different illumination distributions. The illumination device according to the present embodiment further reduces illuminance unevenness in the exhibition space 101 by such a configuration.

  (Fourth Embodiment of Illuminating Device) Here, a fourth embodiment of the illuminating device of the present invention will be described with reference to FIG. In the illumination device of the present embodiment, the configuration different from the illumination device in the first embodiment further includes a mechanism for adjusting the light irradiation angle of the first light emitting diode unit 201 or the second light emitting diode unit 202. It is a point. Other configurations in the illumination device of the present embodiment are the same as the configurations of the illumination device of the first embodiment. In the illumination device according to the present embodiment, the same reference numerals are given to the same components as those in the illumination device according to the first embodiment.

  The illumination device according to the present embodiment includes a first mechanism that adjusts the light irradiation angle of the first light emitting diode unit 201 to the back side b or the front side f of the exhibition space 101. The illumination device according to the present embodiment includes a second mechanism that adjusts the light irradiation angle of the second light emitting diode unit 202 to the back side b or the front side f of the exhibition space 101.

  The illumination device according to the present embodiment includes a mechanism for adjusting the light irradiation angle of the first light emitting diode unit 201. For example, even when the type of product sample to be displayed is different, the illuminance unevenness with respect to the product sample is uneven. Is further reduced. The illumination device according to the present embodiment includes a mechanism for adjusting the light irradiation angle of the second light emitting diode unit 202, so that, for example, even when the type of product sample to be displayed is different, the illuminance unevenness with respect to the product sample is uneven. Is further reduced.

  (Fifth Embodiment of Illuminating Device) Here, a fifth embodiment of the illuminating device of the present invention will be described with reference to FIG. The illumination device of the present embodiment is different from the illumination device of the first embodiment in that the first light reflector 303f or the second light reflector 303b of the second light emitting diode unit 202 is spaced from each other. This is a point composed of a plurality of light reflecting surfaces arranged. Other configurations in the illumination device of the present embodiment are the same as the configurations of the illumination device of the first embodiment. In the illumination device according to the present embodiment, the same reference numerals are given to the same components as those in the illumination device according to the first embodiment.

  The illumination device according to the present embodiment includes a plurality of light reflecting surfaces in which the first light reflectors 303f of the second light emitting diode unit 202 are arranged with a space between each other, whereby the illuminance at the front portion of the exhibition space 101 is obtained. Unevenness is further reduced.

  The illumination device according to the present embodiment includes a plurality of light reflecting surfaces in which the second light reflectors 303b of the second light emitting diode unit 202 are arranged at intervals, so that the illuminance at the back surface of the exhibition space 101 Unevenness is further reduced.

  (Sixth Embodiment of Lighting Device) Here, a sixth embodiment of the lighting device of the present invention will be described with reference to FIG. The illumination device of the present embodiment is different from the illumination device of the first embodiment in that the light emitted from the second light emitting diode unit 202 in the front direction F of the exhibition space 101 is the product sample 204 side (rear surface). It is further provided with means for reflecting in direction B). Other configurations in the illumination device of the present embodiment are the same as the configurations of the illumination device of the first embodiment. In the illumination device according to the present embodiment, the same reference numerals are given to the same components as those in the illumination device according to the first embodiment.

  In the configuration shown in FIG. 13, the light reflecting surface 601 is provided on the surface of the panel provided on the front surface 101 f of the exhibition space 101. The light reflecting surface 601 reflects the light emitted from the second light emitting diode unit 202 in the front direction F of the exhibition space 101 toward the product sample 204 (back direction B).

  The illumination device according to the present embodiment includes means for reflecting the light emitted from the second light emitting diode unit 202 in the front direction F of the exhibition space 101 toward the product sample 204 (back direction B). Irradiance unevenness in the product sample is further reduced.

  (Control of Driving Power of Illumination Unit 102) A control example of driving power of the illumination unit 102 in the present embodiment will be described with reference to FIGS. FIG. 14 is a front view of a vending machine showing an embodiment of control of driving power of the illumination unit 102. FIG. 15 is a circuit block diagram illustrating control of driving power of the illumination unit 102.

  In the vending machines shown in FIGS. 14 and 15, the luminance of the illumination unit 102 changes according to the merchandise price being inserted. More specifically, the brightness of the first light-emitting diode unit 201 or the brightness of the second light-emitting diode unit 202 is controlled so as to change in accordance with the insertion of a product price. In the present embodiment, the first light-emitting diode unit 201 or the second light-emitting diode unit 202 is controlled so that the luminance increases in accordance with the merchandise price being inserted.

  As a specific configuration, the vending machine includes a price insertion sensor 701 that detects that a product price has been input, a drive power control circuit 703 that controls supply of drive power in response to detection of the input of the product price, And a driving power supply circuit 704. The price insertion sensor 701 is mounted inside the vending machine and outputs a detection signal S1 in response to the commodity price being inserted. The drive power control circuit 703 outputs a drive power control signal Sctl according to the detection signal S1. The drive power supply circuit 704 supplies drive power to the illumination unit 102 in accordance with the drive power control signal Sctl.

  In the vending machine shown in FIGS. 14 and 15, the illumination unit 102 changes in luminance according to the purchaser of the product entering a predetermined area in front of the vending machine. More specifically, the brightness of the first light emitting diode unit 201 or the brightness of the second light emitting diode unit 202 is controlled to change in accordance with the purchaser entering a predetermined area in front of the vending machine. Has been. In the present embodiment, the first light-emitting diode unit 201 or the second light-emitting diode unit 202 is controlled so that the luminance increases in accordance with the purchaser entering a predetermined area.

  As a specific configuration, the vending machine includes an area sensor 702 that detects that a purchaser has entered a predetermined area, a drive power control circuit 703 that controls supply of drive power in response to detection by the purchaser, And a driving power supply circuit 704. The area sensor 702 is mounted on the front surface of the vending machine and outputs a detection signal S2 in response to the purchaser entering a predetermined area. The drive power control circuit 703 outputs a drive power control signal Sctl according to the detection signal S2. The drive power supply circuit 704 supplies drive power to the illumination unit 102 in accordance with the drive power control signal Sctl.

  (Cooling Configuration of Illumination Unit 102) An example of the cooling configuration of the illumination unit 102 in the present embodiment will be described with reference to FIGS. FIG. 16 is a front view of a vending machine showing an embodiment of a method for cooling the illumination unit 102. FIG. 17 is a block diagram illustrating a method for cooling the illumination unit 102.

  In the vending machine shown in FIGS. 16 and 17, the illumination unit 102 is cooled by a device that cools a device such as a compressor mounted in the vending machine. Specifically, in the present embodiment, the vending machine includes an illumination unit 102 and a device 901 that cools the compressor. The cooling device 901 is mounted in the vending machine and cools the illumination unit 102 that generates heat.

It is a front view which shows the structure of the vending machine in 1st Embodiment. It is sectional drawing which shows the structure of the illuminating device in 1st Embodiment. FIG. 3 is a diagram illustrating a configuration of an upper surface of an exhibition space 101. It is a figure which shows the other example of 1st Embodiment. (A) is a top view which shows the structure of the 1st light emitting diode unit 201. FIG. (B) is sectional drawing in the X-X 'line | wire of the 1st light emitting diode unit 201 of (a). (A) is a top view which shows the structure of the 2nd light emitting diode unit 202. FIG. (B) is sectional drawing in the X-X 'line | wire of the 2nd light emitting diode unit 202 of (a). It is sectional drawing which shows the structure of the illuminating device in 2nd Embodiment. It is a top view which shows the structure of the illuminating device in 3rd Embodiment. FIG. 6 is a diagram showing an illuminance distribution of the first light emitting diode unit 201. It is a figure which shows the illumination intensity distribution of the 2nd light emitting diode unit. It is sectional drawing which shows the structure of the illuminating device in 4th Embodiment. It is a top view which shows the structure of the illuminating device in 5th Embodiment. It is sectional drawing which shows the structure of the illuminating device in 6th Embodiment. It is a front view of the vending machine which shows embodiment of control of the drive electric power of the illumination part. 3 is a circuit block diagram illustrating control of driving power of an illumination unit 102. FIG. It is a front view of the vending machine which shows embodiment of the cooling method of the illumination part. 4 is a block diagram illustrating a method for cooling the illumination unit 102. FIG.

Explanation of symbols

101 Exhibition Space 201 First Light-Emitting Diode Unit 202 Second Light-Emitting Diode Unit 203 Panel 204 Exhibits 301, 302 Multiple Light-Emitting Diodes 303 A Pair of Optical Reflectors

Claims (20)

It is a lighting device that illuminates the exhibition space where product samples are placed,
A first plurality of light emitting diodes arranged, the first light emitting diode unit disposed on the back side in the upper part of the exhibition space;
The second plurality of light emitting diodes arranged and a pair of light reflectors arranged with the second plurality of light emitting diodes interposed therebetween, and disposed on the front side in the upper part of the exhibition space A second light emitting diode unit;
A lighting device comprising:   The pair of light reflectors includes a first light reflector disposed on a front surface side of the display space with respect to the second plurality of light emitting diodes, and a space of the display space with respect to the second plurality of light emitting diodes. The lighting device according to claim 1, comprising a second light reflector disposed on the back side.   The second light reflector has an outer surface that reflects light emitted from the first plurality of light emitting diodes and an inner surface that reflects light emitted from the second plurality of light emitting diodes. The lighting device according to claim 2, wherein the lighting device is disposed at a position where light emitted from the first plurality of light emitting diodes directly reaches.   The lighting device according to claim 3, wherein the outer surface of the second light reflector is a light scattering surface.   The lighting device according to claim 3, wherein the outer surface of the second light reflector is rougher than the inner surface of the second light reflector.   The lighting device according to claim 1, wherein the first plurality of light emitting diodes includes a plurality of light emitting diode lamps having different illuminance distributions.   The lighting device according to claim 1, wherein the second plurality of light emitting diodes includes a plurality of light emitting diode lamps having different illuminance distributions.   The illumination device according to claim 1, further comprising a mechanism for adjusting a light irradiation angle of the first light emitting diode unit or the second light emitting diode unit. The pair of light reflectors includes a first light reflector disposed on a front surface side of the display space with respect to the second plurality of light emitting diodes, and a space of the display space with respect to the second plurality of light emitting diodes. It consists of a second light reflector arranged on the back side,
The lighting device according to claim 1, wherein the second light reflector includes a plurality of light reflecting surfaces arranged at intervals. In the exhibition space, the first light emitting diode unit and the second light emitting diode unit are arranged on a top surface having a first direction which is a front direction and a second direction perpendicular to the first direction. 1 in parallel in the direction of 1,
The plurality of light emitting diodes in the first light emitting diode unit and the plurality of light emitting diodes in the second light emitting diode unit are alternately arranged in the second direction. The lighting device according to claim 1.   The plurality of light emitting diodes of the first light emitting diode unit and the plurality of light emitting diodes of the second light emitting diode unit include a light emitting diode element that generates ultraviolet light or blue light, and the ultraviolet light or blue light. The lighting device according to claim 1, wherein the lighting device comprises a fluorescent material that emits visible light.   The lighting device according to claim 11, wherein the light emitting diode lamp generates white light which is mixed light composed of a plurality of lights.   The lighting device according to claim 1, further comprising means for reflecting light emitted from the second light emitting diode unit toward the front side of the exhibition space toward the product sample side. The first light emitting diode unit illuminates the back of the exhibition space;
The second light emitting diode unit illuminates the front of the product sample;
The lighting device according to claim 1.   The lighting device according to claim 1, wherein the exhibition space is a space where a sample of a vending machine is placed. The lighting device according to claim 15;
Product samples placed in the exhibition space;
A vending machine comprising: a translucent panel provided in front of the exhibition space. It is a lighting device that illuminates the exhibition space where product samples are placed,
A first lighting means for illuminating the back surface of the exhibition space;
Second illumination means for illuminating the front surface of the exhibition space and reflecting light emitted from the first illumination means to the front side of the exhibition space to the back side of the exhibition space;
A lighting device comprising:   18. The illumination according to claim 17, wherein the second illumination unit diffusely reflects the light emitted from the first illumination unit toward the front side of the exhibition space toward the back side of the exhibition space. apparatus. The first illumination means illuminates the back of the exhibition space;
18. The illumination device according to claim 17, wherein the second illumination means illuminates the product sample. The first illumination means illuminates the back of the exhibition space,
The second illumination means illuminates a front surface of the illumination sample;
The lighting device according to claim 17.

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