JP6536779B2 - Lighting device - Google Patents

Description

  The present invention relates to an illumination device using a laser as a light source.

  Conventionally, a lighting device has been proposed which comprises an array of light emitting diodes as a light source and a fluorescent material excited by the light emitting diodes.

For example, Patent Document 1 (Japanese Patent Application Publication No. 2012-516534) discloses a remote phosphor disposed between an array of light sources and a light output window for emitting light from the light sources. An illumination system is disclosed having a layer and / or a scattering layer.
Japanese Patent Application Publication No. 2012-516534

  However, the above-described conventional lighting device has a problem that precise light distribution control is difficult because an array of light sources and a diode are used. Therefore, it is conceivable to use a laser array as a light source of the illumination device in order to perform more precise light distribution control.

  However, although it is necessary to appropriately diffuse the laser light emitted from the laser array from the viewpoint of safety, the laser light converges again to a high energy density state only by diverging the laser light using a lens. There is a problem that in order to be possible, some measures must be taken separately for the safety as a lighting device.

The present invention is intended to solve the problems as described above, and an illumination device according to the present invention comprises: a laser light source for emitting a laser beam; and light incident from and emitted from the laser light source. A dynamic light deflection device that deflects and emits light, and the direction of the deflection is dynamically changed according to a change in voltage, and light emitted from the dynamic light deflection device is made incident and diffuses incident light comprising a light diffuser, the said dynamic light deflecting device is a electrowetting optical element array in which the unit electrowetting optical element, each of said unit electrowetting optical element, all light incident same It is characterized by emitting in the direction of

In the illumination device according to the present invention, the light diffusion element is a hologram.

In the illumination device according to the present invention, the light diffusion element is an integrator rod.

In the illumination device according to the present invention, a plurality of the laser light sources are provided.

In the illumination device according to the present invention, a predetermined laser light source among the plurality of laser light sources is turned on / off or dimmed.

  According to the lighting device of the present invention, it is possible to perform precise light distribution control, and the safety is improved.

  Moreover, according to the illuminating device which concerns on this invention, the illuminating device which the designability improved can be provided.

It is a perspective view showing composition of lighting installation 100 concerning an embodiment of the present invention. It is a front view showing composition of lighting installation 100 concerning an embodiment of the present invention. FIG. 7 is a schematic view of a cross section of the configuration of a unit electrowetting optical element 50. It is a figure which shows the behavior of the unit electro-wetting optical element 50. FIG. It is a figure which shows the behavior of the unit electro-wetting optical element 50. FIG. It is a perspective view showing the composition of lighting installation 100 concerning other embodiments of the present invention. It is a front view showing composition of lighting installation 100 concerning an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the configuration of a lighting apparatus 100 according to an embodiment of the present invention. Moreover, FIG. 2 is a front view which shows the structure of the illuminating device 100 which concerns on embodiment of this invention.

  The unit laser light source 31 emits laser light of a predetermined wavelength, and is a light source of the illumination device 100 according to the present invention. The unit laser light source 31 is incident on the unit electrowetting optical element 50.

  The unit electrowetting optical element 50 is an optical element capable of deflecting incident light and emitting it.

  Here, the configuration of the unit electrowetting optical element 50 will be described with reference to FIG. FIG. 3 is a schematic view of a cross section of the configuration of the unit electrowetting optical element 50. As shown in FIG.

  In the unit electrowetting optical element 50, a first liquid 55 having conductivity or polarity and a second liquid 56 having hydrophobicity are enclosed in a container 58. Although FIG. 3 shows the structure of the unit electrowetting optical element 50, the other unit electrowetting optical elements 50 have the same structure. Further, by coloring the second liquid 56, it is possible to perform more various light distribution as the lighting device 100, and the design can be improved. However, a transparent one as the second liquid 56 May be used.

  The container 58 includes a pair of base members (first transparent base 51, second transparent base 57) and a pair of base members (first transparent base 51, second transparent) so as to form a liquid enclosed space. And a wall portion 59 for supporting the base material 57) to face each other. One of the first transparent base members 51 includes a plurality of transparent electrodes 52 electrically disposed independently of one another and a transparent insulating layer 53 covering them respectively on the liquid sealing space side. In this example, four transparent electrodes 52 are arranged, but the number of transparent electrodes 52 and the pattern for providing the transparent electrodes are not limited to this. Further, as the transparent electrode 52, it is preferable to use IT0 (tin-doped indium oxide).

Independent applied voltage adjustment units 61, 62, 63, 64 are connected to the respective transparent electrodes 52, whereby the voltages of the respective transparent electrodes 52 can be adjusted independently. In addition, the hydrophobic layer 54 is formed on the transparent insulating layer 53, and the second liquid 56 has high affinity with the hydrophobic layer 54 in the state where no voltage is applied to each of the transparent electrodes 52. As shown in FIG. 3, the hydrophobic layer 54 is covered by the second liquid 56.

  On the other hand, when a voltage is applied to the transparent electrode 52, the first liquid 55 and the transparent electrode 52 function as electrodes, and the transparent insulating layer 53 is polarized. As a result, the first liquid 55 is electrostatically attracted to the transparent insulating layer 53. For this reason, the second liquid 56 covering the transparent insulating layer 53 is pushed away, and the coverage per unit area by the second liquid 56 is reduced. 4 and 5 show a state in which a voltage is applied to the transparent electrode 52. FIG.

  Further, in the unit electrowetting optical element 50, the arrangement of the first liquid 55 and the second liquid 56 can be appropriately adjusted by adjusting the voltages applied to the plurality of transparent electrodes 52. ing.

  Here, the interface between the first liquid 55 and the second liquid 56 functions as a prism so that the unit electrowetting optical element 50 deflects the incident light in the direction of deflection when it is emitted. Will be functioned as a dynamic light deflection device that changes dynamically with changes in voltage.

  A liquid crystal lens is one that functions as a dynamic light deflection device that changes the direction of deflection when emitting incident light by changing the voltage dynamically, and there is a lighting device according to the present invention At 100, a liquid crystal lens may be used instead of the electrowetting optical element array 40.

  FIG. 4 shows a state in which a voltage is applied to the transparent insulating layer 53 of the unit electrowetting optical element 50 and light incident on the unit electrowetting optical element 50 is deflected to the left in FIG. 4 and emitted.

  FIG. 5 shows a state in which a voltage is applied to the transparent insulating layer 53 of the unit electrowetting optical element 50, and light incident on the unit electrowetting optical element 50 is deflected to the right in FIG.

  Now, referring back to FIGS. 1 and 2, the light emitted from the unit electrowetting optical element 50 is incident on the area division hologram 70 used as a light diffusion element in the illumination device 100 according to the present embodiment.

  Each reproduced image is recorded in the unit area 71 of the area divided hologram 70. For example, the light emitted from the unit electrowetting optical element 50 shown by a dashed dotted line in FIG. , And reproduces the reproduced image B when the light emitted from the unit electrowetting optical element 50 shown by the two-dot chain line is incident on the area division hologram 70 as the reproduction illumination light. There is.

  The direction of the reproduction illumination light incident on the area division hologram 70 and the direction of the reproduction light by the area division hologram 70 are preferably substantially the same direction, and such setting is also made in the illumination device 100 according to the present embodiment. It is done.

The unit electrowetting optical element 50 is controlled such that the light emitted from the unit electrowetting optical element 50 is repeatedly scanned between x and y in FIG.
An illumination area as shown in FIG. 1 is formed as the illumination device 100 according to the present embodiment.

    In the illumination device 100 according to the present invention, the laser light emitted from the laser array 30 is emitted through the unit electrowetting optical element 50 and the area division hologram 70, so that the light emitting portion of the illumination device 100 can be viewed by the observer. Even if you accidentally make a mistake, it can be said that the design is safe and with less danger.

    As mentioned above, according to the illuminating device 100 which concerns on this invention, while being able to perform precise light distribution control, safety improves.

  Moreover, according to the illuminating device 100 which concerns on this invention, the illuminating device 100 which the designability improved can be provided.

  Next, another embodiment of the present invention will be described. FIG. 6 is a perspective view showing the configuration of a lighting apparatus 100 according to another embodiment of the present invention. FIG. 7 is a front view showing the configuration of the lighting apparatus 100 according to the embodiment of the present invention.

  The laser array 30 is composed of a plurality of unit laser light sources 31 for emitting laser light of a predetermined wavelength, and is a light source of the illumination device 100 according to the present invention. In the illumination device 100 according to the present invention, although a plurality of unit laser light sources 31 will be described as an example of a one-dimensional arrangement in which the plurality of unit laser light sources 31 are arranged in the left and right direction of FIG. Also, a two-dimensional array in which a plurality of unit laser light sources 31 are arrayed can be configured.

  Each of the plurality of unit laser light sources 31 in the laser array 30 is configured to be capable of on / off control. By turning on and off the unit laser light source 31 in this manner, it is possible to perform more precise light distribution control as the lighting device 100.

  The light emitted from each unit laser light source 31 constituting the laser array 30 is to be incident on the electrowetting optical element array 40. The electrowetting optical element array 40 is formed by arranging a plurality of unit electrowetting optical elements 50 described above in a two-dimensional direction.

  The light emitted from the electrowetting optical element array 40 is incident on the light diffusion element 80 in the present embodiment, and the light emitted from the light diffusion element 80 forms an illumination area.

  Here, in the illumination device 100 according to the present embodiment, for example, illumination is performed by performing control such that the unit electrowetting optical element 50 that constitutes the electrowetting optical element array 40 is in the state illustrated in FIG. 4. It becomes possible to bias the light distribution direction of the apparatus 100 to the left side in the plane of FIG.

  In addition, in the lighting apparatus 100 according to the present embodiment, control is performed so that the unit electrowetting optical elements 50 constituting the electrowetting optical element array 40 are in the state illustrated in FIG. It becomes possible to bias the light distribution direction to the right side in the plane of FIG.

As described above, the illumination device 100 according to the present embodiment can perform various light distribution control, and the laser light emitted from the laser array 30 is the electrowetting optical element array 40 and the light diffusion element. Since the light is emitted through the light source 80, it is possible to say that the design is less in danger and in consideration of safety even when the observer erroneously looks at the light emitting part of the lighting apparatus 100.

  In the embodiment described above, an example in which the area division hologram 70 is used as the light diffusion element 80 has been described. However, as the light diffusion element, the integrator rod 50, the fly's eye lens, or the fly's eye lens is a condenser lens The form of combining etc. can also be used. Furthermore, a quadrangular prism-shaped member having a mirror surface on the inner surface may be used.

  Further, in the illumination device 100 according to the present embodiment as described above, each unit laser light source 31 of the laser array 30 is modulated, that is, each unit laser light source 31 is selectively turned on / off or dimmed. Then, by selectively causing the laser light to be incident on a specific position in the light diffusing element, any illumination distribution can be created.

  As mentioned above, according to the illuminating device 100 which concerns on this embodiment, while being able to perform precise light distribution control, safety improves.

  Moreover, according to the illuminating device 100 which concerns on this embodiment, the illuminating device 100 which the designability improved can be provided.

  Note that an embodiment in which the lighting devices 100 according to the embodiments described above are arbitrarily combined is also included in the scope of the present invention.

30: laser array 31: unit laser light source 40: electrowetting optical element array 50: unit electrowetting optical element 51: first transparent base 52: transparent electrode 53: · · Transparent insulating layer 54 · · · Hydrophobic layer 55 · · · First liquid 56 · · · Second liquid 57 · · Second transparent base material 58 · · · Container 59 · · · Wall portion 61, 62 , 63, 64 ... applied voltage adjustment unit 70 ... area division hologram 71 ... unit area 80 ... light diffusion element 100 ... illumination device

Claims (5)

Laser light source for emitting laser light,
A dynamic light deflection device that receives light emitted from the laser light source, deflects and emits the incident light, and dynamically changes the direction of the deflection according to a change in voltage;
And a light diffusing element for entering the light emitted from the dynamic light deflection device and diffusing the incident light;
The dynamic light deflection device is an electrowetting optical element array in which unit electrowetting optical elements are arranged ,
A lighting device characterized in that each of the unit electrowetting optical elements deflects all incident light in the same direction and emits it. The illumination device according to claim 1, wherein the light diffusion element is a hologram. The illumination device according to claim 1, wherein the light diffusion element is an integrator rod. The lighting device according to any one of claims 1 to 3, wherein a plurality of the laser light sources are provided. The lighting device according to claim 4, wherein a predetermined laser light source is turned on / off or dimmed among the plurality of laser light sources.

Images