JP4609422B2 - Lighting device for work table - Google Patents

Description

  The present invention relates to a work table lighting device.

  Conventionally, for example, a person who works at night is irradiated with white light by a fluorescent lamp or the like in the daytime, and at night, a spectral component having a wavelength region of 410 to 505 nm is obtained by an illumination device as described in Patent Document 1. It is known to perform phototherapy for biological rhythm by controlling the secretion of melatonin by irradiating with reduced light.

The illuminating device of Patent Document 1 forms a casing that opens in one direction with a reflector, and a light source is disposed in the casing, and a spectral component in a wavelength region of 410 to 505 nm is cut into the opening of the casing. The filter is arranged.
JP 2005-230171 A

  However, when a person is irradiated with light by the lighting device of Patent Document 1, the irradiated person may feel dazzling. Therefore, there is a desire to be able to perform light therapy unconsciously without humans being dazzled. Moreover, since it is not possible to perform phototherapy with this illuminating device alone, there is also a demand for making it possible to perform phototherapy with a single illuminating device.

  For example, it is conceivable that the lighting device can be installed on a work table and the user can work on the lighting device. If it can be set as such a working table lighting device, it is not necessary to be conscious of the lighting device in appearance, but this alone cannot satisfy all of the above requirements.

  JP-A-2000-279522 discloses an illuminating device that is installed on a work table and on which a user works, but this illuminating device emits light with high illuminance for a certain period of time. This is for performing high-illumination light treatment for irradiation, and not for performing light treatment for biological rhythm.

  In view of such a demand, an object of the present invention is to provide an illumination device for a work table that allows a user to receive phototherapy for a biological rhythm without the user being aware of it.

  According to a first aspect of the present invention, there is provided a substrate mounted on a work table, and a first light emitting panel that is disposed on the substrate and emits light having a maximum light emission intensity in a wavelength region of a blue component in a spectral distribution. A second light-emitting panel that is disposed on the substrate and emits light having a maximum light emission intensity outside the wavelength region of the blue component in the spectral distribution, and covers the first light-emitting panel and the second light-emitting panel from above. And a light-transmitting top plate, and the second light-emitting panel is turned off during daytime to turn on the first light-emitting panel, and at night, the first light-emitting panel is turned off and the second light-emitting panel is turned on. And a controller that controls power supply to the first light-emitting panel or the second light-emitting panel, and the control unit has a brightness that does not cause the user to feel dazzling by the first light-emitting panel or the second light-emitting panel. The first light emitting panel to emit light An illumination device for a working table, wherein the or performs a power supply to the second light-emitting panel.

  According to this configuration, since the first light emitting panel and the second light emitting panel are disposed on the substrate placed on the work table, and the top plate is disposed thereon, the user can work on the top plate. However, the light emitted from the first light-emitting panel and the second light-emitting panel can be exposed. In the daytime, it is possible to suppress the secretion of melatonin by turning on the first light-emitting panel that emits light having the maximum emission intensity in the wavelength region of the blue component in the spectral distribution, and in the spectral distribution in the nighttime. By turning on the second light-emitting panel that emits light having the maximum emission intensity outside the wavelength range of the blue component, secretion of melatonin can be promoted. That is, by switching the lighting of the first light-emitting panel and the second light-emitting panel by the control unit, it is possible to perform light therapy on the biological rhythm with the device alone. Moreover, since the first light-emitting panel and the second light-emitting panel emit light with a brightness that does not make the user feel dazzling, the user receives light therapy without being conscious while working on the top board. be able to.

  For example, as in the invention of claim 2, the wavelength region of the blue component may be a wavelength region of 450 to 500 nm.

  Further, as in the invention of claim 3, it is preferable that the first light emitting panel and the second light emitting panel are arranged on the substrate so as to be alternately arranged vertically and horizontally.

  In this way, the light emitted from the first light emitting panel and the light emitted from the second light emitting panel can be evenly exposed to the user.

  Further, as in the invention of claim 4, the substrate preferably has flexibility.

  In this way, even if the work table has irregularities, it is possible to prevent the substrate from rattling.

  As described above, according to the present invention, the user can receive phototherapy without being aware of it.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, a work table illumination device 2 according to an embodiment of the present invention is installed on a work table 1. The work table 1 is, for example, a desk or a table, and a user places office supplies or tableware on the work table lighting device 2 installed on the work table 1 to perform work such as desk work and meals.

  Specifically, as shown in FIG. 2, the work table illumination device 2 includes a rectangular plate-like substrate 3 placed on the work table 1 and a first light emitting panel 5 </ b> A disposed on the substrate 3. And a second light emitting panel 5B, a top plate 6 disposed so as to cover the first light emitting panel 5A and the second light emitting panel 5B from above, and a control unit 7.

  Hereinafter, the longitudinal direction of the substrate 3 is referred to as the left-right direction or the lateral direction, and the short direction of the substrate 3 is referred to as the front-rear direction or the longitudinal direction.

  The substrate 3 is made of a synthetic resin such as vinyl chloride or polypropylene and has flexibility.

  The first light-emitting panel 5A and the second light-emitting panel 5B have a strip-like shape extending in the left-right direction, and are arranged in a matrix on the substrate 3 so as to be alternately arranged vertically and horizontally (in the illustrated example, 6 rows vertically, 2 rows horizontally).

  Further, a pair of left and right electrode portions 58 is provided at a position near the left side of the lower surface of the first light emitting panel 5A, and a pair of left and right electrode portions 58 are provided at a position near the right side of the lower surface of the second light emitting panel 5B. On the other hand, on the upper surface of the substrate 3, a pair of left and right first conductors 4A extending in the front-rear direction and a pair of left and right second conductors 4B extending in the front-rear direction are provided at appropriate positions. The electrode portion 58 of the first light emitting panel 5A is electrically connected to the first conductor 4A, and the electrode portion 58 of the second light emitting panel 5B is electrically connected to the second conductor 4B.

  The top plate 6 is made of a glass plate having a thickness of 2 mm, for example, and has translucency. The top plate 6 has substantially the same size as the substrate 3 in plan view, and is joined to the substrate 3 with the first light emitting panel 5A and the second light emitting panel 5B interposed therebetween. In addition, it is preferable that the top plate 6 is a thing to which the light scattering process was made | formed. In this way, the inside becomes difficult to see, and the entire top panel 6 appears to shine when the first light emitting panel 5A or the second light emitting panel 5B emits light.

  More specifically, as shown in FIG. 3, the first light-emitting panel 5 </ b> A includes a support substrate 51, a first electrode layer 52, an organic light-emitting layer 53, and a second electrode layer 54 stacked on the back surface of the support substrate 51. An organic EL layer and a first sealing member 55 and a second sealing member 56 for covering the organic EL layer are provided.

  The support substrate 51 is a flat member for supporting the organic EL layer, and is made of a material transparent to the wavelength of light emitted from the organic light emitting layer 53, such as glass.

  The first electrode layer 52 is a conductive thin film made of a material transparent to the wavelength of light emitted from the organic light emitting layer 53, and serves as an anode. The first electrode layer 52 is made of, for example, ITO (Indium Tin Oxide) or the like. A part of the first electrode layer 52 is drawn out so as to be exposed from the first sealing member 55 on one end side of the support substrate 51 to form an anode terminal portion 521.

The organic light emitting layer 53 emits blue light, and includes at least a light emitting layer made of an organic material of a fluorescent substance or an organic material containing a fluorescent substance. A hole transport layer, an electron transport layer, an electron injection layer, and the like are provided. More specifically, when the first electrode layer 52 and the second electrode layer 54 are also described, for example, the following layer structure is provided.
(1) (first electrode layer 52; anode) / light emitting layer / (second electrode layer 54; cathode)
(2) (first electrode layer 52; anode) / hole transport layer / light emitting layer / (second electrode layer 54; cathode)
(3) (first electrode layer 52; anode) / light emitting layer / electron transport layer / (second electrode layer 54; cathode)
(4) (first electrode layer 52; anode) / hole transport layer / light emitting layer / electron transport layer / (second electrode layer 54; cathode)
(5) (first electrode layer 52; anode) / hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer / (second electrode layer 54; cathode)

  The second electrode layer 54 is a conductive thin film made of a material that reflects light having a wavelength emitted from the organic light emitting layer 53 and serves as a cathode. The second electrode layer 54 is formed of, for example, a metal or an alloy such as aluminum (Al), aluminum lithium (Al: Li), and magnesium silver (Mg: Ag). A portion of the second electrode layer 54 is drawn out so as to be exposed from the first sealing member 55 on the other end side facing the one end side of the support substrate 51 to form a cathode terminal portion 541.

  The first sealing member 55 and the second sealing member 56 have insulating properties for hermetically sealing the organic EL layer except for the anode terminal portion 521 and the cathode terminal portion 541 in cooperation with the support substrate 51. It is a member. For example, a first resin sealing member 55 having adhesiveness is applied so as to cover the first electrode layer 52 except the anode terminal portion 521, the organic light emitting layer 53, and the second electrode layer 54 except the cathode terminal portion 541. For example, the second sealing member 56 made of a plate-like member made of glass is placed on the second electrode layer 54 via the first sealing member 55 and pressure is applied, whereby the second sealing member 56 is applied. Is bonded to the second electrode layer 54 by the first sealing member 55, and the peripheral edge portion of the second sealing member 56 is hermetically bonded and bonded to the support substrate 51 by the first sealing member 55. Thus, the first sealing member 55 and the second sealing member 56 cooperate with the support substrate 51 to hermetically seal the portions of the organic EL layer excluding the anode terminal portion 521 and the cathode terminal portion 541.

  Moreover, the electrode part 58 mentioned above is provided in the back surface of the 2nd sealing member 56 which comprises the lower surface of 5 A of 1st light emission panels, and the anode terminal part 321 and the cathode terminal part 341 are provided in this pair of electrode part 58. Are electrically connected by a wiring member 57.

  Furthermore, a phosphor 59 is provided on the surface of the support substrate 51. As shown in FIG. 5, the first light-emitting panel 5A has a wavelength within the wavelength range of the blue component in the spectral distribution, that is, a wavelength of 450 to 500 nm. Emits light with the maximum emission intensity in the region.

  Although not shown, the second light-emitting panel 5B has a filter that effectively cuts light having a wavelength of 450 to 500 nm attached to the upper surface of the first light-emitting panel 5A, that is, the upper surface of the phosphor 59. Yes, as shown in FIG. 6, light having the maximum emission intensity is emitted outside the wavelength region of the blue component in the spectral distribution, that is, outside the wavelength region of 450 to 500 nm.

  The control unit 7 is connected to the first conductor 4A and the second conductor 4B by the wiring member 47, and can turn on / off the energization of the first light-emitting panel 5A and the second light-emitting panel 5B. ing. Then, the controller 7 turns off the second light-emitting panel 5B and turns on the first light-emitting panel 5A during the daytime (for example, between 6:00 and 17:00), and turns on the first light-emitting panel at night (for example, between 17:00 and 6:00 on the next day). Power supply to the first light-emitting panel 5A or the second light-emitting panel 5B is controlled so that the panel 5A is turned off and the second light-emitting panel 5B is turned on. As a result, the work table lighting device 2 emits blue light during the day and red or yellow light other than the blue light at night.

  Further, the control unit 7 causes the first light emitting panel 5A or the second light emitting panel 5A or the second light emitting panel 5A or the second light emitting panel 5B to emit light with a luminance (for example, 250 lux or less) that does not make the user feel dazzling. Power is supplied to the panel 5B. As a result, the work table lighting device 2 is illuminated so that the color of the top 6 changes in day and night, and the top 6 appears to be stained blue during the day, and the top 6 at night. Appears to be dyed red or yellow other than blue.

  As described above, in the work table illumination device 2 according to the present embodiment, the first light emitting panel 5A and the second light emitting panel 5B are disposed on the substrate 3 placed on the work table 1, and the top plate is disposed thereon. 6 is disposed, the user can be exposed to light emitted from the first light emitting panel 5A and the second light emitting panel 5B while working on the top plate 6. In the daytime, it is possible to suppress the secretion of melatonin by turning on the first light-emitting panel 5A that emits light having the maximum emission intensity in the wavelength region of the blue component in the spectral distribution. In this case, the secretion of melatonin can be promoted by turning on the second light-emitting panel 5B that emits light having the maximum light emission intensity outside the wavelength region of the blue component. That is, by switching the lighting of the first light-emitting panel 5A and the second light-emitting panel 5B by the control unit 7, it is possible to perform light therapy on the biological rhythm with the device alone. In addition, since the first light-emitting panel 5A and the second light-emitting panel 5B emit light with a brightness that does not cause the user to feel dazzling, the user can operate the light on the top plate 6 without consciousness. Can receive treatment.

  Further, since the first light emitting panel 5A and the second light emitting panel 5B are arranged on the substrate 3 so as to be alternately arranged vertically and horizontally, the light emitted from the first light emitting panel 5A and the light emitted from the second light emitting panel 5B are emitted. Users can be exposed to light evenly.

  In addition, since the substrate 3 has flexibility, even if the work table 1 has irregularities, it is possible to prevent the substrate 3 from rattling.

  In addition, in the said embodiment, what stuck the filter to the 1st light emission panel 5A was made into the 2nd light emission panel 5B, but the 2nd light emission panel 5B makes organic light emitting layer 53 of the 1st light emission panel 5A other than blue. For example, it may be changed to a configuration that emits warm color light such as red or yellow. For example, the light emitted from the second light-emitting panel 5B is light having a maximum light emission intensity in the wavelength region of 600 to 780 nm in the spectral distribution or a green component (550 to 600 nm while maintaining high light emission intensity in the wavelength region. ) In which the emission intensity is maximum within the wavelength region.

It is a perspective view of the illuminating device for work tables and work table which concern on one Embodiment of this invention. It is a disassembled perspective view of the illuminating device for work tables. It is a bottom view of a 1st light emission panel. It is the IV-IV sectional view taken on the line of FIG. It is a figure which shows the spectral distribution of a 1st light emission panel. It is a figure which shows the spectral distribution of a 2nd light emission panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work table 2 Lighting device for work tables 3 Board | substrate 4A, 4B Feeder 5A 1st light emission panel 5B 2nd light emission panel 58 Electrode part 6 Top plate 7 Control part

Claims (4)

A substrate placed on the work table, a first light-emitting panel disposed on the substrate and emitting light having a maximum emission intensity within the wavelength region of the blue component in the spectral distribution, and a substrate disposed on the substrate. A second light-emitting panel that emits light having a maximum light emission intensity outside the wavelength region of the blue component in the spectral distribution, and a translucent light disposed so as to cover the first light-emitting panel and the second light-emitting panel from above The first light-emitting panel or the second light-emitting panel is turned off and the first light-emitting panel is turned on at night, and the second light-emitting panel is turned on at night. A control unit for controlling power feeding to the second light emitting panel,
The control unit supplies power to the first light-emitting panel or the second light-emitting panel so that the first light-emitting panel or the second light-emitting panel emits light with a luminance that does not make the user feel dazzling. A lighting device for a work table.   2. The work table illumination device according to claim 1, wherein the wavelength region of the blue component is a wavelength region of 450 to 500 nm.   The work table illumination device according to claim 1 or 2, wherein the first light-emitting panel and the second light-emitting panel are arranged on the substrate so as to be alternately arranged vertically and horizontally.   The said board | substrate has a softness | flexibility, The illuminating device for work tables of any one of Claims 1-3 characterized by the above-mentioned.

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