JPH0757877A - Automatic dimming lighting system - Google Patents

Automatic dimming lighting system

Info

Publication number
JPH0757877A
JPH0757877A JP5215086A JP21508693A JPH0757877A JP H0757877 A JPH0757877 A JP H0757877A JP 5215086 A JP5215086 A JP 5215086A JP 21508693 A JP21508693 A JP 21508693A JP H0757877 A JPH0757877 A JP H0757877A
Authority
JP
Japan
Prior art keywords
artificial lighting
lighting
solar cell
artificial
natural light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5215086A
Other languages
Japanese (ja)
Other versions
JP2732782B2 (en
Inventor
Hideaki Oda
英明 小田
Hideo Totsuka
秀夫 戸塚
Hiroto Akiyama
広人 秋山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kajima Corp
Original Assignee
Kajima Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kajima Corp filed Critical Kajima Corp
Priority to JP5215086A priority Critical patent/JP2732782B2/en
Publication of JPH0757877A publication Critical patent/JPH0757877A/en
Application granted granted Critical
Publication of JP2732782B2 publication Critical patent/JP2732782B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/10Photovoltaic [PV]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Photovoltaic Devices (AREA)

Abstract

PURPOSE:To utilize the characteristics of a solar battery whose generating quantity is fluctuated by a change of solar light for the dimming of an artificial lighting required in the deeper side of a penthouse, realize a well-balanced lighting environment without using various complicated devices, and simultaneously attain reduction in facility cost, dimming, and energy saving. CONSTITUTION:A solar battery 5 conducting solar light generation is directly connected to a DC artificial lighting 7 through a power source wiring. The artificial lighting 7 may be provided only in a dark area S1 on a building deeper side difficult to take natural light. Further, the solar battery 5 and the artificial lighting 7 may be vertically arranged on a vertical line.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、自動調光照明装置に関
し、詳しくは、自然光の光量変化に伴い照明光を自動調
節し、自然光の変動による自然光照射領域と非照射領域
との照度差を是正するもので、特に、懐の深い廂を有す
る屋外競技場等に用いて好適なものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic dimming illumination device, and more specifically, it automatically adjusts illumination light in accordance with a change in the amount of natural light, and changes the illuminance between the natural light irradiation area and the non-irradiation area due to the fluctuation of natural light. It is intended to be corrected, and is particularly suitable for use in an outdoor stadium or the like which has a deep-spoken neighborhood.

【0002】[0002]

【従来の技術】懐の深い廂を有する屋外競技場等では、
自然光が取り入れ難い廂奥側において人工照明が必要と
なる。この場合、廂奥側部分の明るさの感覚は、廂の無
い部分(屋外側)における自然光による明るさとの差に
より左右される。即ち、太陽光の照射により屋外側が充
分に明るい場合には、この廂奥側における人工照明もそ
れに応じて照度を高める必要があり、逆に、太陽光の照
射が充分でなく屋外側もあまり明るくない場合には、そ
れに応じて、廂奥側における人工照明による明るさも抑
えることが可能となる。このような調光を行うことによ
り、廂奥側において屋外側と違和感を生じさせない、バ
ランスのとれた照明環境が実現されることになる。この
ような目的で使用される人工照明システムでは、照度を
検出するための昼光センサーが天井から吊り下げられ、
この昼光センサーにより調光が行われていた。
2. Description of the Related Art In outdoor stadiums and the like with a deep nostalgia,
Artificial lighting is required on the back side where natural light is difficult to take in. In this case, the sensation of the brightness of the backside part depends on the difference from the brightness due to natural light in the part without the backside (outdoor side). That is, if the outdoor side is sufficiently bright due to the irradiation of sunlight, it is necessary to increase the illuminance of the artificial lighting on the back side accordingly, and conversely, the irradiation of sunlight is not sufficient and the outdoor side is too bright. If there is not, the brightness due to artificial lighting on the back side can be suppressed accordingly. By performing such dimming, a well-balanced lighting environment that does not cause a sense of discomfort on the back side and on the outdoor side is realized. In artificial lighting systems used for this purpose, a daylight sensor for detecting illuminance is hung from the ceiling,
Dimming was performed by this daylight sensor.

【0003】一方、照明エネルギの省エネルギ化を図る
ため、所謂太陽電池を用いて、太陽光発電により人工照
明を点灯させる照明システムがある。このような照明シ
ステムでは、直流で発電された電気を交流に変換する変
換装置や、天候による発電量の変動を安定させるための
蓄電池等が必要であった。
On the other hand, in order to save energy for illumination energy, there is an illumination system in which a so-called solar cell is used to turn on artificial illumination by solar power generation. In such a lighting system, a conversion device for converting electricity generated by direct current into alternating current, a storage battery for stabilizing fluctuations in the amount of power generation due to weather, and the like are required.

【0004】[0004]

【発明が解決しようとする課題】廂奥側において屋外側
と違和感を生じさせない、バランスのとれた照明環境を
実現させるためには、この部分における人工照明におい
て調光が必要となる。しかし、調光設備を設けることは
設備コストを増大させるとともに、これらの設備の管理
も発生させることになった。一方、照明エネルギの省エ
ネルギ化等を図る太陽電池を用いた照明システムがある
が、電流の変換装置や、供給電源の安定化を図るための
蓄電池等との諸装置を備えなければならず、設備が大掛
かりとなる欠点があった。本発明は上記状況に鑑みてな
されたもので、太陽光の変化により発電量が変動する太
陽電池の特質を、廂奥側において必要となる人工照明の
調光に利用し、複雑な諸装置を用いずにバランスのとれ
た照明環境の実現が可能となる自動調光照明装置を提供
し、もって、設備コストの低減、調光、省エネルギ化を
同時に達成することを目的とする。
SUMMARY OF THE INVENTION In order to realize a well-balanced lighting environment that does not cause a sense of discomfort on the back side and the outdoor side, it is necessary to adjust light in artificial lighting in this part. However, the provision of the dimming equipment increased the equipment cost and required the management of these equipments. On the other hand, there is a lighting system using a solar cell for energy saving of lighting energy, but it is necessary to provide various devices such as a current conversion device and a storage battery for stabilizing the power supply, There was a drawback that the equipment was large. The present invention has been made in view of the above situation, and uses the characteristics of a solar cell in which the amount of power generation fluctuates due to changes in sunlight, for the dimming of artificial lighting required on the back side, and complicated devices are provided. (EN) An automatic dimming lighting device that can realize a well-balanced lighting environment without using it, and an object thereof is to simultaneously achieve reduction in equipment cost, dimming, and energy saving.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
の本発明に係る自動調光照明装置の構成は、自然光と人
工照明とを併用する建造物に設けられて自然光に追従さ
せて人工照明を調光する自動調光照明装置であって、太
陽光発電を行う太陽電池を電源配線を介して直流人工照
明に直結したことを特徴とするものである。また、自動
調光照明装置は、太陽電池に直結された人工照明が自然
光の取り入れ難い建造物奥側の暗所領域にのみ設けられ
たことを特徴とするものであってもよい。さらに、自動
調光照明装置は、太陽電池と人工照明とを鉛直線上の上
下に配置したものであってもよい。
The structure of the automatic dimming lighting device according to the present invention for achieving the above object is provided in a building in which natural light and artificial lighting are used in combination, and artificial lighting is made to follow natural light. An automatic dimming lighting device for dimming a light source is characterized in that a solar battery for photovoltaic power generation is directly connected to a direct current artificial lighting via a power supply wiring. Further, the automatic dimming lighting device may be characterized in that the artificial lighting directly connected to the solar cell is provided only in a dark place area on the back side of the building where natural light is difficult to be taken in. Further, the automatic light control lighting device may be one in which a solar cell and artificial lighting are arranged vertically above and below.

【0006】[0006]

【作用】太陽光の照射が充分で、屋外側の領域が明るく
なった際には、太陽電池による発電量が増加し、人工照
明の明るさが自然光に追従して増し、暗所領域と屋外側
の領域との間に明るさの差が無くなる。また逆に、太陽
光の照射が減少すると、これに伴って太陽電池の発電力
が低下し、自然光の低下に追従して人工照明の明るさも
下がり、暗所領域と屋外側の領域との間に明るさの差が
無くなる。また、太陽電池と人工照明とが鉛直線上の上
下に配置されれば、人工照明が取り付けられる位置にお
ける固有の受光状態が反映され、太陽光の部分的な照射
に追従して人工照明が調光されることになり、照明環境
が屋外の日射状態と同様となる。
[Operation] When the sunlight is sufficient and the area on the outdoor side becomes bright, the amount of power generated by the solar cell increases, and the brightness of artificial lighting increases in accordance with natural light. There is no difference in brightness from the outside area. On the contrary, when the irradiation of sunlight decreases, the power generation of the solar cell decreases accordingly, the brightness of artificial lighting also decreases following the decrease in natural light, and the brightness between the dark area and the outdoor area is reduced. There is no difference in brightness. Also, if the solar cell and artificial lighting are arranged above and below the vertical line, the unique light receiving state at the position where the artificial lighting is attached is reflected, and the artificial lighting is dimmed by following partial irradiation of sunlight. As a result, the lighting environment becomes similar to the outdoor solar radiation state.

【0007】[0007]

【実施例】以下、本発明に係る自動調光照明装置の好適
な実施例を図面を参照して詳細に説明する。図1は本発
明自動調光照明装置の概要図、図2は太陽電池と照明器
具との接続状態を表す側面図である。例えば、懐の深い
廂1を有する屋外競技場3には、自然光が取り入れ難い
廂奥側の暗所領域S1 が存在する。暗所領域S1 は、自
然光が取り入れ易い屋外側の領域S2 と異なり、太陽光
の増大によっては明るさが追従せず、明暗の差が拡大す
る領域となる。このような建造物の例えば廂1には太陽
電池5が敷設され、太陽電池5は太陽光の照射を受けて
直流電流を発電するようになっている。一方、暗所領域
1 内の廂1の裏側には人工照明7が取り付けられ、人
工照明7は太陽電池5と直接に配線接続されている。つ
まり、人工照明7は、太陽電池5により発電された電力
を電源として、直接点灯されるようになっている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of an automatic light control lighting device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic view of an automatic light control lighting device of the present invention, and FIG. 2 is a side view showing a connection state between a solar cell and a lighting fixture. For example, in the outdoor stadium 3 having the fountain 1 with a deep pocket, there is a dark area S 1 on the back side where natural light is difficult to take in. The dark area S 1 is an area in which the brightness does not follow the increase in sunlight and the difference in light and dark expands, unlike the area S 2 on the outdoor side where natural light is likely to be taken in. A solar cell 5 is laid in, for example, a building 1 of such a building, and the solar cell 5 receives direct sunlight to generate a direct current. On the other hand, the artificial lighting 7 is attached to the back side of the shed 1 in the dark area S 1 , and the artificial lighting 7 is directly connected to the solar cell 5 by wiring. That is, the artificial lighting 7 is directly turned on by using the electric power generated by the solar cell 5 as a power source.

【0008】人工照明7は、太陽電池5から供給される
直流電源をそのまま入力できるランプ、例えばハロゲン
ランプ等とする。また、人工照明7における照度と消費
電流との電流特性を、太陽光の変化に伴う太陽電池5の
発電時の電流特性と一致させる。つまり、太陽電池5
は、太陽光の変化に伴って、所定の明るさに人工照明7
が点灯できるような発電特性を有するものとなってい
る。これにより、太陽光が充分な状態で、屋外側の領域
2 が明るい時には、これに伴って、人工照明7も明る
くなるのである。太陽電池5、人工照明7を主な部材と
して、自動調光照明装置9が構成されている。
The artificial lighting 7 is a lamp, such as a halogen lamp, which can directly receive the DC power supplied from the solar cell 5. In addition, the current characteristics of the illuminance and the consumed current in the artificial lighting 7 are made to match the current characteristics of the solar cell 5 during power generation due to changes in sunlight. That is, the solar cell 5
Is artificial lighting 7 with a predetermined brightness as the sunlight changes.
Has a power generation characteristic such that can be turned on. As a result, when the outdoor area S 2 is bright with sufficient sunlight, the artificial illumination 7 also becomes bright accordingly. An automatic dimming lighting device 9 is configured by mainly using the solar cell 5 and the artificial lighting 7.

【0009】このように構成される自動調光照明装置9
において、太陽光の照射が充分であり、屋外領域、及び
自然光が取り入れ易い屋外側の領域S2 が充分に明るく
なった際には、太陽電池5においても太陽光による充分
な照射が行われ、発電量が増加して人工照明7の照度が
自然光に追従して増し、暗所領域S1 と領域S2 との間
に明るさの差が無くなることになる。また、この逆に、
太陽光の照射が減少すると、屋外領域、及び領域S2
明るさが下がり、これに伴って太陽電池5の発電力が低
下することにより、自然光の低下に追従して人工照明7
の明るさも下がり暗所領域S1 と領域S2 との間に明る
さの差が無くなるのである。これにより、複雑な調光装
置を用いることなく、自然光に追従して人工照明7を調
光することが可能となる。
The automatic dimming lighting device 9 having the above-mentioned structure
In the above, when the irradiation of sunlight is sufficient and the outdoor area and the area S 2 on the outdoor side where natural light is easily taken in become sufficiently bright, the solar cell 5 is also sufficiently irradiated with sunlight, As the amount of power generation increases, the illuminance of the artificial lighting 7 increases in accordance with natural light, and the difference in brightness between the dark area S 1 and the area S 2 disappears. On the contrary,
When the irradiation of sunlight decreases, the brightness of the outdoor area and the area S 2 decreases, and the power generation of the solar cell 5 decreases accordingly, so that the artificial lighting 7 follows the decrease in natural light.
The brightness is also reduced, and there is no difference in brightness between the dark area S 1 and the area S 2 . This makes it possible to adjust the artificial lighting 7 by following natural light without using a complicated light control device.

【0010】なお、このように構成される自動調光照明
装置9は、人工照明7を暗所領域S1 に限らず、領域S
2 に設けるものであってもよい(図中破線部参照)。そ
して、人工照明7を廂1の奥側に向かうに従って除々に
数を増やして設ければ、廂1の先端側から奥側が段階的
に人工照明7により照明されることになり、廂の奥側に
向かうに従って暗くなる明るさの違和感を無くすことが
できる。
In the automatic dimming lighting device 9 thus constructed, the artificial lighting 7 is not limited to the dark area S 1 but the area S 1.
It may be provided in 2 (see the broken line in the figure). Then, if the number of artificial lighting 7 is gradually increased toward the back side of the shelter 1, the artificial lighting 7 is gradually illuminated from the tip side of the shelter 1 to the back side of the shelter. It is possible to eliminate the feeling of strangeness in the brightness that gets darker as you go to.

【0011】また、自動調光照明装置9は、図2に示す
ように、人工照明7と太陽電池5を鉛直方向で一致させ
て配置したものであってもよい。この場合、太陽電池5
は、できる限り少ない面積で所要電力が発電できるもの
とする。つまり、人工照明7が取り付けられる位置にお
ける固有の受光状態が反映できるものとすることが望ま
しい。このような構成とすれば、太陽光の部分的な照射
に追従して個々の人工照明7が調光されることになる。
即ち、雲の流れ等により、日射が得られる部分と日射が
遮られた部分とで、屋外の日射状態と同様に明るさを変
化させることができ、より自然な照明環境を実現するこ
とができるようになる。
Further, as shown in FIG. 2, the automatic light control lighting device 9 may be a device in which the artificial lighting 7 and the solar cell 5 are arranged so as to be aligned in the vertical direction. In this case, the solar cell 5
Shall be able to generate the required power in the smallest possible area. That is, it is desirable that the unique light receiving state at the position where the artificial illumination 7 is attached can be reflected. With such a configuration, the individual artificial lighting 7 is dimmed following the partial irradiation of sunlight.
That is, the brightness can be changed between the part where the solar radiation is obtained and the part where the solar radiation is blocked by the flow of clouds, as in the outdoor solar radiation state, and a more natural lighting environment can be realized. Like

【0012】なお、上述の実施例では、廂1を有した屋
外競技場3を例に説明したが、本発明に係る自動調光照
明装置9は、自然光と人工照明とを併用するような建造
物において、自然光に追従して人工照明7を調光する場
合の全てに応用することができ、例えば、ドーム、エア
ターミナル等に用いられてもよい。
In the above embodiment, the outdoor stadium 3 having the shed 1 is described as an example, but the automatic dimming lighting device 9 according to the present invention is constructed so that natural light and artificial lighting are used in combination. The present invention can be applied to all cases in which the artificial lighting 7 is dimmed by following natural light, and may be used, for example, in a dome, an air terminal, or the like.

【0013】[0013]

【発明の効果】以上詳細に説明したように、本発明に係
る自動調光照明装置によれば、人工照明を太陽電池に直
結して暗所領域に設けたので、人工照明の明るさが自然
光に追従して調光され、複雑な諸装置を用いずにバラン
スのとれた照明環境の実現が可能となり、その結果、設
備コストの低減、調光、省エネルギ化を同時に達成する
ことができる。また、太陽電池と人工照明とを鉛直線上
の上下に配置すれば、人工照明が取り付けられる位置に
おける固有の受光状態が反映され、太陽光の部分的な照
射に追従して個々の人工照明を調光することができ、よ
りキメの細かな調光が可能となる。
As described in detail above, according to the automatic dimming lighting device of the present invention, since the artificial lighting is directly connected to the solar cell and provided in the dark area, the brightness of the artificial lighting is natural. It becomes possible to realize a well-balanced lighting environment without using complicated devices, and as a result, it is possible to simultaneously reduce equipment costs, dimming, and save energy. If the solar cell and artificial lighting are arranged vertically above and below the vertical line, the unique light receiving state at the position where the artificial lighting is attached is reflected, and the individual artificial lighting is adjusted by following the partial irradiation of sunlight. It is possible to shine light, and finer light control is possible.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明自動調光照明装置の概要図である。FIG. 1 is a schematic view of an automatic dimming lighting device of the present invention.

【図2】太陽電池と照明器具との接続状態を表す側面図
である。
FIG. 2 is a side view showing a connection state between a solar cell and a lighting device.

【符号の説明】[Explanation of symbols]

5 太陽電池 7 人工照明 9 自動調光照明装置 S1 暗所領域5 Solar cell 7 Artificial lighting 9 Automatic dimming lighting device S 1 Dark area

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 自然光と人工照明とを併用する建造物に
設けられて自然光に追従させて人工照明を調光する自動
調光照明装置であって、 太陽光発電を行う太陽電池を電源配線を介して直流人工
照明に直結したことを特徴とする自動調光照明装置。
1. An automatic dimming lighting device provided in a building that uses both natural light and artificial lighting to adjust artificial lighting by following natural light, wherein a solar cell for photovoltaic power generation has power wiring. An automatic dimming lighting device characterized by being directly connected to a DC artificial lighting via.
【請求項2】 太陽電池に直結された前記人工照明が自
然光の取り入れ難い建造物奥側の暗所領域にのみ設けら
れたことを特徴とする請求項1記載の自動調光照明装
置。
2. The automatic dimming lighting device according to claim 1, wherein the artificial lighting directly connected to the solar cell is provided only in a dark area on the back side of the building where natural light is difficult to be taken in.
【請求項3】 前記太陽電池と前記人工照明とを鉛直線
上の上下に配置したことを特徴とする請求項1又は請求
項2記載の自動調光照明装置。
3. The automatic dimming lighting device according to claim 1, wherein the solar cell and the artificial lighting are arranged above and below a vertical line.
JP5215086A 1993-08-06 1993-08-06 Automatic dimming lighting system Expired - Fee Related JP2732782B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5215086A JP2732782B2 (en) 1993-08-06 1993-08-06 Automatic dimming lighting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5215086A JP2732782B2 (en) 1993-08-06 1993-08-06 Automatic dimming lighting system

Publications (2)

Publication Number Publication Date
JPH0757877A true JPH0757877A (en) 1995-03-03
JP2732782B2 JP2732782B2 (en) 1998-03-30

Family

ID=16666524

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5215086A Expired - Fee Related JP2732782B2 (en) 1993-08-06 1993-08-06 Automatic dimming lighting system

Country Status (1)

Country Link
JP (1) JP2732782B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011108494A (en) * 2009-11-18 2011-06-02 Sekisui House Ltd Natural light following type led lighting device
JP2013211248A (en) * 2012-02-29 2013-10-10 Kotaro Kinugasa Illumination system
JP2014082153A (en) * 2012-10-18 2014-05-08 Kotaro Kinugasa Illumination system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011108494A (en) * 2009-11-18 2011-06-02 Sekisui House Ltd Natural light following type led lighting device
JP2013211248A (en) * 2012-02-29 2013-10-10 Kotaro Kinugasa Illumination system
JP2014082153A (en) * 2012-10-18 2014-05-08 Kotaro Kinugasa Illumination system

Also Published As

Publication number Publication date
JP2732782B2 (en) 1998-03-30

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