JP2007188805A - Daylighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a daylighting device capable of letting in sunlight and reproducing it for illumination in a specific area. <P>SOLUTION: The daylighting device letting in sunlight for utilization as illumination comprises a daylighting part 1, a light controlling part 2, and a light guide part 3. The daylighting part 1 is provided with a main reflecting plate 4 reflecting the sunlight in a given direction, the light controlling part 2 is provided with a light controlling mechanism 2a for controlling intensity of reflected light (sunlight) reflected at the main reflecting plate 4 as well as a color temperature controlling mechanism 2b for controlling color temperature (spectrum energy distribution) of the reflected light, and the light guide part 3 is provided with an irradiation angle controlling mechanism for re-reflecting the light with its intensity and color temperature controlled by the light controlling part 2 toward an object for illumination 10 at a given angle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a daylighting apparatus that uses sunlight (natural light) for illumination.

  2. Description of the Related Art Conventionally, various daylighting devices that use sunlight for illumination are devised.

  The daylighting device includes a daylighting unit that captures sunlight, a light guide unit that transports the sunlight that has been collected, and a light emitting unit that emits the transported light to the room or an object to be illuminated. .

An optical fiber (Patent Document 1) or an optical duct (Patent Document 2) having an inner surface formed of a reflective surface is used for the light guide portion.
JP 7-33004 A JP 58-23102 A

  In recent years, the advantages of lighting by daylighting devices have attracted more attention than ever, and there is an increasing interest in making the colors of exhibits more natural and beautiful especially when used for lighting in showrooms and the like.

  For this reason, the present inventors have developed products that have design characteristics and may be used in various regions of the world, such as fashion products, furniture furnishings, and automobiles. Considering designing with lighting that reproduces the sunshine, we conducted intensive studies to achieve it.

  As a result, it has been found that the sunlight in the specific area can be reproduced by adjusting each of the three elements of the intensity of sunlight, the color temperature (spectral energy distribution), and the direction of irradiation. It came to complete. An object of the present invention is to provide a daylighting device that takes sunlight and adjusts it to reproduce and illuminate sunlight in a specific area and further in a specific time zone.

  The invention described in claim 1 is a daylighting apparatus that shines sunlight and uses it for illumination. The daylighting apparatus includes a daylighting unit, a dimming unit, and a light guide unit, and the daylighting unit reflects sunlight in a predetermined direction. A main reflection plate, wherein the light control unit adjusts the intensity of reflected light (sunlight) reflected by the main reflection plate and a color temperature (spectral energy distribution) of the reflected light. A temperature adjustment mechanism, and the light guide unit includes an irradiation angle adjustment mechanism that re-reflects the light whose intensity and color temperature are adjusted by the light control unit toward the object to be illuminated at a predetermined angle. It is the lighting device characterized.

  A second aspect of the present invention is the daylighting apparatus according to the first aspect, wherein the daylighting unit includes a sun tracking unit that adjusts a direction of the main reflector according to a position of the sun.

  According to a third aspect of the present invention, the irradiation angle adjusting mechanism selects one or a plurality of sub-reflecting plates among a plurality of sub-reflecting plates set at various predetermined angles, thereby setting an irradiation angle to the object to be illuminated. The daylighting apparatus according to claim 1, wherein the daylighting apparatus is adjusted.

  A fourth aspect of the present invention is the daylighting device according to the third aspect, wherein a punching metal or a half mirror is used for the sub-reflecting plate.

  A fifth aspect of the present invention is the daylighting device according to the third or fourth aspect, wherein the irradiation angle of the sub-reflecting plate is adjusted by an electric type.

A sixth aspect of the present invention is the daylighting device according to any one of the first to third aspects, wherein an artificial solar lamp is provided in front of the main reflector.
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  The daylighting device of the present invention includes a daylighting unit, a dimming unit, and a light guide unit, and the daylighting unit includes a main reflector that reflects sunlight in a predetermined direction, and the dimmer is reflected by the main reflector. A light adjusting mechanism that adjusts the intensity of the reflected light (sunlight) and a color temperature adjusting mechanism that adjusts the color temperature (spectral energy distribution) of the reflected light. Since it has an irradiation angle adjustment mechanism that re-reflects the light whose intensity and color temperature are adjusted toward the object to be illuminated at a predetermined angle, the intensity, color temperature, and irradiation angle of the collected sunlight (reflected light) are adjusted. Can be adjusted arbitrarily. Therefore, by adjusting and irradiating the reflected light to the sunlight in a specific area suitable for the product, the product developer can test and confirm the appearance of the product without going to the place where the product is used. For example, in the development of products that can be used anywhere in the world, such as automobiles, it is possible to increase the quality of the product while suppressing the development cost and increasing the speed.

  The said daylighting part is able to collect sunlight stably during the daytime by providing solar tracking means for adjusting the orientation of the main reflector according to the position of the sun.

  The irradiation angle adjusting mechanism adjusts the irradiation angle to the object to be illuminated by selecting one or a plurality of sub-reflecting plates set to various predetermined angles. The irradiation angle to the illumination object can be easily adjusted.

  By providing an artificial solar lamp in front of the main reflector, the influence of the shade of the sun can be mitigated. It can also be used on cloudy days.

  The daylighting device of the present invention adjusts the intensity and color temperature (spectral energy distribution) of the sunlight collected by the main reflector of the daylighting unit with the light adjustment mechanism and the color temperature adjustment mechanism of the dimming unit, and further the irradiation angle By adjusting the irradiation direction with the adjusting mechanism, the developed product can be designed by illuminating it with sunlight in a specific area / time zone.

  In the present invention, the irradiation direction of the sunlight (reflected light) can be adjusted using a sub-reflecting plate. A plane mirror is usually used for the main reflector and the sub-reflector, but strong sunlight can be reproduced using a parabolic mirror.

  The present invention will be specifically described below with reference to the drawings.

  1A to 1C are side explanatory views showing a first embodiment of a daylighting apparatus of the present invention.

  The daylighting device includes a daylighting unit 1, a dimming unit 2, and a light guide unit 3. The daylighting unit 1 includes a main reflecting plate 4 that reflects sunlight in a predetermined direction. The dimming unit 2 includes the main reflecting plate 4. And an ND filter (light adjustment mechanism) 2a for adjusting the intensity of sunlight reflected by the light source and a color temperature conversion filter (color temperature adjustment mechanism) 2b for adjusting the color temperature of sunlight reflected by the main reflector 4. The light guide unit 3 guides the light 6 modulated by the ND filter 2a and the color temperature conversion filter 2b, and the modulated light 6 by one of the plurality of sub-reflection plates 7a to 7d. Re-reflect at a predetermined angle to irradiate (emit light) the room or the object to be illuminated. The light guide unit 3 may be provided with an optical duct having an inner surface formed of a reflective surface to increase the light guide efficiency.

  Here, the sunshine in a specific area / time zone is characterized by three elements: light intensity, color temperature, and irradiation direction. Of these, the light intensity is mainly characterized by the local weather conditions, etc., and the color temperature and irradiation direction are mainly related to the latitude and time zone.

  For the adjustment of the light intensity, an ND filter having various transmittances is prepared, and a method for selecting an optimum sunshine for a specific area to be reproduced and a variable ND filter capable of continuously adjusting the transmittance are used. A method, a method of adjusting an aperture (aperture), a method of changing a path by reflection, and the like can be applied.

  The color temperature is adjusted by preparing a plurality of types of color temperature conversion filters and selecting a color temperature conversion filter corresponding to the latitude and time zone of a specific area to be reproduced. These filters can be used in combination with a plurality of filters having different characteristics (transmittance and color temperature).

  The irradiation direction is adjusted as follows. The sub-reflecting plates 7a to 7d may be in a state where the reflecting surface is directed to the object to be illuminated (On) or a state in which the reflecting surface is directed downward (Off). One side is rotatably attached to the light guide floor 8. At the position of the sub-reflection plate in the off state, the dimmed light 6 passes without being reflected.

  Holes 8a to 8d for irradiating the object to be illuminated installed in the lower design room with the re-reflected light reflected by the sub-reflecting plates 7a to 7d are opened in the light guide unit floor surface 8. The auxiliary sub-reflecting plate 7 s is at an angle of 45 ° with respect to the light guide floor surface 8 in order to guide the modulated light 6 to the low-angle sub-reflecting plate 7 d attached to the side wall of the design room. It is attached. The light guide floor 8 is also provided with a hole 8s for guiding the re-reflected light of the auxiliary sub-reflecting plate 7s to the sub-reflecting plate 7d.

  On-off switching of the sub-reflection plate provided in the light guide is performed by the sub-reflection plate control means. As the sub-reflecting plate control means, an electric type is recommended because the irradiation angle can be adjusted accurately and quickly.

  The main reflector 4 is provided with tracking means 9, so that sunlight is stably collected during the day. In addition, an artificial solar lamp may be provided. Note that conventional tracking means can be used, such as one in which the main reflector is driven uniaxially or biaxially by a motor.

  Either the ND filter 2a or the color temperature conversion filter 2b may be arranged first. Further, both may be in contact or separated.

  Next, a usage example of the daylighting apparatus will be described.

  FIG. 1A shows a case where an object to be illuminated is reproduced by reproducing the sunlight in the daytime in a specific area of low latitude. Sunlight is reflected by the main reflector 4 and becomes light 6 that is modulated by the ND filter 2a and the color temperature conversion filter 2b, re-reflected by the first sub-reflector 7a, and opened to the light guide floor surface 8. The illuminated object (automobile) 10 disposed in the design room is illuminated from directly above through the hole 8a.

  FIG.1 (b) shows the case where the to-be-irradiated object is illuminated reproducing the morning or evening sunlight of the high latitude specific area. The light 6 modulated by the ND filter 2a and the color temperature conversion filter 2b is sequentially re-reflected by the auxiliary sub-reflecting plate 7s and the sub-reflecting plate 7d below it to illuminate the automobile from a low position. Here, the sub-reflectors 7a to 7c that are not used are laid on the light guide floor surface 8 so as to block the holes 8a to 8c so as not to block the dimmed light 6 (θ = 0 °).

  In this way, by turning the dimmed light 6 through the auxiliary sub-reflecting plate, irradiation from a low position can be performed even when the space is limited. If the space is sufficiently wide, the auxiliary sub-reflection plate 7S need not be used.

  In addition, when reproducing the morning and evening in the low latitude area, the daytime in the high latitude area, or the sunlight in the middle latitude area, any one of the sub-reflection plates 7b and 7c may be used.

  Fig. 1 (c) shows an example of how to use a special lighting effect. The lighting effect of a special atmosphere can be obtained by irradiating part of the light from a different angle while reproducing the sunlight in a specific area / time zone. This is the case. Here, by using a reflection / transmission plate 7p made of punching metal (a metal plate having many small holes) at the position of the first sub-reflection plate 7a, a part of the light is reflected and the rest is transmitted. Is possible. The light quantity ratio between the reflected light and the transmitted light can be determined by the size or number of small holes. The first sub-reflector 7a is slid and retracted sideways (front or back in the drawing) so that it does not interfere with the punching metal reflector 7p.

  The dimmed light 6 is adjusted to light intensity and color temperature corresponding to daylight in the low latitude area. In addition, the punching metal reflection / transmission plate 7p is selected to have a small hole size (or a small number) so that most of the dimmed light 6 is irradiated from directly above. Thereby, most of the light-modulated light 6 is reflected by the reflection / transmission plate 7p and irradiates the automobile 10 from directly above, and the remaining portion of the light-modulated light 6 is a small hole in the reflection / transmission plate 7p. It passes through the sub-reflecting plate 7c (the sub-reflecting plate 7b is laid down), and the automobile 10 is irradiated from the rear.

  Further, in FIG. 1C, it is possible to irradiate a part of light from directly above while reproducing the morning or evening sunlight in a high latitude region. In that case, the reflection / transmission plate 7p made of punching metal is selected so that the small holes have a large size (or a large number), and the ratio of the amount of light reaching the sub-reflection plate 7c is increased.

  In FIG. 1C, a half mirror may be used instead of the punching metal reflection / transmission plate 7p.

  In this first embodiment, instead of using a plurality of sub-reflecting plates set at each angle, the light guide 3 can slide in the front-rear direction (the left-right direction in the figure) and the angle with respect to the object to be illuminated It is also possible to use one sub-reflecting plate that can be adjusted arbitrarily. (However, in this case, the usage method as shown in FIG. 1C is not possible.)

2A is a side explanatory view and FIG. 2B is a plan explanatory view showing a second embodiment of the daylighting apparatus of the present invention.
This daylighting apparatus is characterized in that the basic mechanism is the same as in the first embodiment, but the illumination can have a width (depth). That is, subreflector 7a in FIG. 1, corresponding to 7b or the like, in FIG. 2, _7a to 7a column 1 _～7A 4, 7b column _7b 1 ～7B ₄ etc., the subreflector of the four copies each column Have. Each sub-reflection plate can be driven on-off independently, and the sub-reflection plates in different rows can be turned on at the same time. For example, in FIG. 2B, the rows 7a to 7c are set to Off (sleep state), 7d ₃ and 7d ₄ are turned On for the 7d row, and 7d ₁ and 7d ₂ are Off (sleep state). To. For the 7e column, 7e ₁ and 7e ₂ are turned on. In FIG. 2B, the on-state sub-reflection plate is hatched. As a result, the dimmed light 6 can be reflected by both the 7d row and the 7e row, and the irradiation angle can be widened to realize more natural sunlight.

  Further, in the configuration as in the second embodiment, not only the purpose of realizing the sunshine in a specific area, but also the object to be irradiated can be divided from each direction by arbitrarily controlling the On-Off of each sub-reflector. It can also be used for irradiation.

(A)-(c) is side explanatory drawing which shows 1st Embodiment of the lighting device of this invention. It is (a) side surface explanatory drawing and (b) plane perspective explanatory drawing which show 2nd Embodiment of the daylighting apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Daylighting part 2 Light control part 2a ND filter (light adjustment mechanism) which adjusts the intensity | strength of reflected light
2b Color temperature conversion filter that adjusts the color temperature of reflected light (color temperature adjustment mechanism)
3 Light Guide 4 Main Reflector 6 Dimmed Light 7a to 7d Sub Reflector 7s Auxiliary Sub Reflector 7p Reflection / Transmission Plate 8 Light Guide Floor 8a to 8d Hole 8s Opened on the Light Guide Floor Hole 9 in the light guide floor 9 Tracking means 10 Illuminated object (automobile)

Claims (6)

  In a daylighting device that shines sunlight and uses it for illumination, the daylighting device comprises a daylighting unit, a dimming unit, and a light guide unit, and the daylighting unit includes a main reflector that reflects sunlight in a predetermined direction, The light control unit includes a light adjustment mechanism that adjusts the intensity of reflected light (sunlight) reflected by the main reflector, and a color temperature adjustment mechanism that adjusts the color temperature (spectral energy distribution) of the reflected light, The daylighting device, wherein the light guide unit includes an irradiation angle adjustment mechanism that re-reflects the light whose intensity and color temperature are adjusted by the light control unit toward the object to be illuminated at a predetermined angle.   The daylighting device according to claim 1, wherein the daylighting unit includes a sun tracking unit that adjusts a direction of the main reflector according to a position of the sun.   The irradiation angle adjusting mechanism adjusts an irradiation angle to an object to be illuminated by selecting one or a plurality of sub-reflecting plates set at various predetermined angles. The daylighting device according to claim 1 or 2. The daylighting apparatus according to claim 3, wherein a punching metal or a half mirror is used for the sub-reflection plate.   The daylighting apparatus according to claim 3 or 4, wherein an irradiation angle of the sub-reflecting plate is adjusted by an electric type.   The daylighting device according to any one of claims 1 to 3, wherein an artificial solar lamp is provided in front of the main reflector.

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