JP3877342B2 - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
JP3877342B2
JP3877342B2 JP05636695A JP5636695A JP3877342B2 JP 3877342 B2 JP3877342 B2 JP 3877342B2 JP 05636695 A JP05636695 A JP 05636695A JP 5636695 A JP5636695 A JP 5636695A JP 3877342 B2 JP3877342 B2 JP 3877342B2
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Japan
Prior art keywords
illuminance
detection unit
lighting
output
time
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JP05636695A
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Japanese (ja)
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JPH08250285A (en
Inventor
美稚子 岩井
潤一 加藤
信男 岩田
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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    • 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

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Description

【0001】
【産業上の利用分野】
本発明は、例えば事務所などの執務空間において机上面等の被照射面の平均照度をほぼ一定照度に保つための照明装置に関するものであり、昼光などの有効利用が可能で省エネルギー化が図れる照明装置を提供するものである。
【0002】
【従来の技術】
従来、実開平4−87189号に開示されているように、照度検出部を用いた照明装置が提案されている。この装置は、或る設定照度を設けて、照度検出部がその設定照度以上(又は以下)になったときに、照明の状態を変えようとするものである。よって、或る被照射面を一定の平均照度にするためのものではなく、器具自身の光照射量を含めて計測して点灯状態を調整しているものではなかった。
【0003】
【発明が解決しようとする課題】
上述の従来例では、照度検出部により周囲の照度を検知することによって照明の点灯状態を制御していた。よって、照明器具自身が自ら出している光の量と外部からの光を含めて、或る被照射面の照度を調整するというものではなかった。
【0004】
本発明はこのような点に鑑みてなされたものであり、その目的とするところは、被照射面の平均照度をほぼ一定照度に制御するために、照明器具の点灯状態の調整方法を工夫し、より快適な照明を実現することにある。
【0005】
【課題を解決するための手段】
本発明の照明装置にあっては、上記の課題を解決するために、図1に示すように、照明器具5と、照明器具5の被照射面からの反射光を検出できる場所に配置され、照明器具5により照明される環境の照度を検出できる照度検出部1と、照度検出部1からの出力信号を受けるタイミングを制御するタイマ部4と、照度検出部1からの出力信号及び照明器具5の点灯状態を記憶し得るメモリ部3と、タイマ部4により決定される或る一定時間ごとに照度検出部1から入力されるデータと、メモリ部3に記憶されたデータに基づいて、被照射面の平均照度がほぼ一定になるように、且つ、照度検出部1により検出された照度が所定の範囲よりも低い場合に前記所定の範囲に変化させるときの照度変化の速度は、照度検出部1により検出された照度が前記所定の範囲よりも高い場合に前記所定の範囲に変化させるときの照度変化の速度よりも大きくなるように照明器具5の点灯状態を決定する制御部2とからなることを特徴とするものである。
図1は本発明の基本構成を示している。図中、1は照度検出部であり、例えばCdS(硫化カドウミウム)やPD(フォトダイオード)のような明るさを検出できる素子を用いる。2は制御部であり、照度検出部1からの出力信号を受けて、照明器具5を制御する。照明器具5は制御部2に複数台接続することができる。本制御部2は、或る一定時間ごとに照度検出部1からの入力を受けて、照明器具5をどのような点灯状態にするのかを決定し、決定した点灯状態になるように、照明器具5に例えばデューティ等の調光信号を送る。3はメモリ部であり、照度検出部1からの信号や照明装置の点灯状態(たとえば、照明器具5に送ったデューティ等の調光信号)などを制御部2からの書き込み動作により記憶することが出来る。また、メモリ部3から制御部2に記憶データを読み出すことができる。4はタイマ部であり、制御部2に或る一定時間ごとに或る一定の信号を送る。このタイマ部4により、制御部2が照度検出部1からの信号を検出するタイミングが制御される。このタイミングは制御部2によって設定される。5は照明器具であり、制御部2に一台又は複数台接続されて、制御部2からの調光信号等により制御される。
【0006】
以上のような構成において、被照射面からの反射光を検知できるような場所(例えば天井面)に照度検出部1を取り付けて、その照度検出部1からの出力信号に基づいて被照射面の平均照度がほぼ一定になるように、照明器具5が制御される。
【0007】
【作用】
例えば、図2の斜線部で示すように、照度検出部1の出力のうち、或る区間を設定照度範囲とする。照度検出部1の出力が、この設定照度範囲(V3〜V4)に含まれていれば、被照射面が或る目標とする平均照度に保たれている。また、設定照度範囲の下限V3以下にも或る設定出力V2、V1、…があり、設定照度範囲の上限V4以上にも或る設定出力V5、V6、…がある。照度検出部1の出力がどの範囲内に含まれているかを判定して、照明器具5の制御状態の目標を決める。また、照明器具5の状態を徐々に変化させて制御状態を目標まで変化させる照明変化時間(フェード時間)も決める。例えば、表1に示すように、照度検出部1の出力が所定の照度範囲V4〜V5に含まれていれば、T1の時間をかけて光出力をD1だけ減らす。設定照度範囲V3〜V4に出力が含まれているときは、設定平均照度に保たれているので、照明の状態もそのまま保つ。また、所定の照度範囲V1〜V2に含まれているときには、TT2の時間をかけて光出力をU2だけ増やす。このような表はメモリ部3に記憶しておけば良い。
【0008】
【表1】

Figure 0003877342
【0009】
ただし、表1において、減光量Dx、増光量Ux、減光時間Tx、増光時間TTx(x=1,2,3)には基本的に以下のような関係がある。
|D1|<|D2|<|D3|
|U1|<|U2|<|U3|
|Dx|<|Ux|
|Ux/TTx|<|Dx/Tx| (x=1,2,3)
【0010】
つまり、設定照度範囲の近くでは、減光量Dx、増光量Uxの絶対値は小さい。また、減光量Dxの絶対値は、増光量Uxの絶対値よりも小さい。さらに、増光時の照度変化は、減光時の照度変化よりも速い。これにより、快適な照度変化を実現できる。すなわち、外的な要因によって、被照射面の平均照度が暗くなったときは、早く明かりを確保したいので、照明の光出力を早く増やし、逆に明るくなったときは照明の光出力を減らさなくてはいけないが、急激に減らしてしまうと違和感があるので、増やすときよりもゆっくりと減らす。このような制御を行うことによって人間の視覚が順応しやすくなるので、被照射面の平均照度をほぼ一定に制御すると共に、照明を調整しているときの違和感を無くすことができる。
【0011】
以上のように、予め決められたパラメータに基づいて制御されるが、次のような現象が起こったときは、パラメータに所定の処理がなされる。
▲1▼照度検出部1の出力が設定照度範囲を飛び越えて同じ区間を振動したとき、例えば、V4〜V5→V2〜V3→V4〜V5というように移動したとき、照明の点灯状態の増減量を幾らか減らし、照明の変化時間は幾らか増やす。
▲2▼照度検出部1の出力が設定照度範囲から離れていて光出力を調整したにもかかわらず、次回の出力が前回にも増して離れているとき、照明の点灯状態の増減量をいくらか増やす。ただし、明るい方へ発散している場合には、照明の変化時間はそのままでもよいが、暗い方へ発散している場合には、照明の変化時間を短くして早く明かりを確保できるようにする。
【0012】
【実施例】
以下、本発明の一実施例について説明する。制御部2に接続された照明器具5は、デューティ信号に応じて連続的に0〜100%の範囲で調光できる蛍光灯器具であり、デューティ信号のデューティ比が100%のときに100%点灯、デューティ比が0%のときに0%点灯となるように、構成されている。ここで、照度検出部1からの出力は、例えば0〜5Vのような範囲で変化し、0Vのときに暗状態、5Vのときに明状態を検知できるような出力である。いま、例えば、表2に示すような条件で照明器具5が制御されているものとする。
【0013】
【表2】
Figure 0003877342
【0014】
照度検出部1の出力は一定時間おき(例えば30秒おき)に計測され、そのときの出力値により、照明器具5に送られる調光信号のデューティ比が変化する。例えば、照度検出部1の出力が1.5〜1.7Vの範囲に含まれるときは、照度検出部1を天井に取り付けたとき、2m下の机上面における平均照度が約750lxに保たれるものとする。その場合の照度検出部1の出力の一例を図3に示す。今、時刻t0 のとき、デューティ比が80%の調光状態で点灯している。30秒後の時刻t1 における照度検出部1の出力は、V(t1 )=1.6〔V〕であった。よって、調光信号のデューティ比は80%のままである。次の時刻t2 における照度検出部1の出力は、V(t2 )=2.0〔V〕となったので、表1に基づいて10秒間のフェード時間をかけて、調光信号のデューティ比が78%パーセントに減らされた。時刻t4 において、照度検出部1の出力は、V(t4 )=2.5〔V〕となったので、15秒間のフェード時間をかけて、調光信号のデューティ比が−4されて、74%になった。また、時刻t7 には、照度検出部1の出力は、V(t7 )=1.3〔V〕となったので、10秒間のフェード時間をかけて、デューティ比を現在の72%から76%に増加させる。
【0015】
ところで、上述のような制御をしていても、外光などの影響があるので、図4の時刻t0 〜t4 のように照度検出部1の出力が振動したり、同じく図4の時刻t5 〜t6 のように発散の方向へ向かうこともある。このような場合には、照明が絶えず明るくなったり暗くなったりして、その照明のもとで作業する人にとってはちらつきになったり、必要な照度が早く確保できない恐れがある。よって、照度検出部1の前のデータを記憶しておいて、以下のような動作を行う。まず、図4の時刻t0 では、照度検出部1の出力は、V(t0 )=1.6Vなので、80%の点灯を保持する。時刻t1 では、照度検出部1の出力は、V(t1 )=1.8Vであり、10秒間のフェード時間をかけてデューティ比を−2して、68%点灯にする。次に、時刻t2 では、照度検出部1の出力は、V(t2 )=1.1Vであり、10秒間のフェード時間をかけてデューティ比を+4して、72%点灯にする。時刻t3 では、V(t3 )=1.9Vであり、時刻t1 、t2 と制御したことにより、振動している。よって、デューティ比の変化量を−2×80%の−1.6とし、フェード時間も10秒×120%の12秒とする。よって、12秒のフェード時間をかけて70.4%の点灯に変化する。時刻t4 では、設定値内であるので、70.4%の点灯を保持する。
【0016】
次に、時刻t5 では、照度検出部1の出力は、V(t5 )=2.5Vであり、フェード時間15秒で66.4%点灯へ変化させる。時刻t6 では、V(t6 )=3.0Vであり、時刻t5 でデューティ比を下げたにもかかわらず、明るいと検知しているので、デューティ比を−4×160%の−6.4とし、フェード時間15秒で減らし、60%点灯へ変化させる。時刻t7 では、V(t7 )=1.9Vであり、フェード時間10秒で−2して、58%点灯へ変化させる。時刻t8 では、設定値内であるので、58%の点灯を保持している。時刻t9 では、V(t9 )=2.0Vであり、フェード時間10秒でデューティ比を−2とし、56%点灯を保持している。時刻t10では、V(t10)=1.3Vであり、10秒でデューティ比を+4とし、60%点灯へ変化させる。時刻t11では、V(t11)=2.1Vであり、10×1.2=12秒でデューティ比を−2×0.8=−1.6して、58.4%点灯へ変化させる。時刻t12では、V(t12)=1.4Vであり、時刻t10、t11、t12と振動しているので、+4の60%で+2.4とし、フェード時間を10秒の105%の10.5秒として、60.8%点灯へ変化させる。時刻t13では、設定値内であるので、60.8%の点灯を保持する。時刻t14では、V(t14)=0.9Vであり、フェード時間18秒で+7して、67.8%点灯へ変化させる。時刻t15では、時刻t14でデューティ比を増やしたにもかかわらず、まだ、0.8〜1.2V間のV(t15)=1.1Vであるので、デューティ比を+7×170%の+11.9とし、フェード時間を18×0.8の14.4秒として79.7%点灯へ変化させる。時刻t16では、時刻t15でデューティ比を増やしたにもかかわらず、まだ、V(t16)=1.35Vで設定値内に入らないので、+4の150%の+6、フェード時間を10秒×0.8の8秒として、85.7%点灯へ変化させる。時刻t17では、V(t17)=1.8Vであるので、10秒のフェード時間でデューティ比を−2して、83.7%点灯へ変化させる。時刻t18、時刻t19では、設定値内なので、デューティ比83.7%の点灯を維持する。
【0017】
【発明の効果】
請求項1の発明によれば、例えば机上面のような作業面をある一定の平均照度にほぼ保つことができる。本装置を用いることによって必要のない人工照明による光出力は省くことができる。よって、蛍光灯などの経年変化による光出力の差も無くすことができ、昼光なども有効に利用できるため、省エネルギー効果が向上すると共に、ちらつきや時間ごとの照度差が少ないため、好ましい視環境が得られるものである。さらに、外的な要因によって、被照射面の平均照度が暗くなったときは、早く明かりを確保したいので、照明の光出力を早く増やし、逆に明るくなったときは照明の光出力を減らさなくてはいけないが、急激に減らしてしまうと違和感があるので、増やすときよりもゆっくりと減らすように制御することによって人間の視覚が順応しやすくなるので、被照射面の平均照度をほぼ一定に制御すると共に、照明を調整しているときの違和感を無くすことができ、これにより、快適な照度変化を実現できる。
【0018】
また、請求項2のような条件で制御すれば照明の光出力が増減を繰り返して、ちらつくことを防止でき、また、請求項のような条件で制御すれば、照明の光出力が増加方向又は減少方向に発散することを防止することができる。
【図面の簡単な説明】
【図1】本発明のブロック回路図である。
【図2】本発明による照度検出部の出力と照明制御の関係を示す説明図である。
【図3】本発明の第1実施例の動作説明図である。
【図4】本発明の第2実施例の動作説明図である。
【符号の説明】
1 照度検出部
2 制御部
3 メモリ部
4 タイマ部
5 照明器具[0001]
[Industrial application fields]
The present invention relates to an illuminating device for maintaining an average illuminance of an irradiated surface such as a desk surface in a work space such as an office at a substantially constant illuminance, which can be effectively used as daylight and can save energy. An illumination device is provided.
[0002]
[Prior art]
Conventionally, as disclosed in Japanese Utility Model Laid-Open No. 4-87189, an illumination device using an illuminance detection unit has been proposed. This apparatus provides a certain set illuminance, and tries to change the illumination state when the illuminance detection unit becomes greater than (or less than) the set illuminance. Therefore, it is not for making a certain irradiated surface have a constant average illuminance, and it is not for adjusting the lighting state by measuring including the light irradiation amount of the instrument itself.
[0003]
[Problems to be solved by the invention]
In the above-described conventional example, the lighting state of the illumination is controlled by detecting the ambient illuminance by the illuminance detection unit. Therefore, the illuminance of a certain irradiated surface is not adjusted by including the amount of light that the lighting fixture itself emits and the light from the outside.
[0004]
The present invention has been made in view of the above points, and the object of the present invention is to devise a method for adjusting the lighting state of a lighting fixture in order to control the average illuminance of the irradiated surface to a substantially constant illuminance. To achieve more comfortable lighting.
[0005]
[Means for Solving the Problems]
In the lighting device of the present invention, in order to solve the above problems, as shown in FIG. 1, the lighting device 5 and the reflected light from the irradiated surface of the lighting device 5 can be detected, An illuminance detector 1 that can detect the illuminance of the environment illuminated by the luminaire 5, a timer unit 4 that controls the timing of receiving an output signal from the illuminance detector 1, an output signal from the illuminance detector 1, and the luminaire 5 a memory unit 3 capable of storing the lighting state of the data input from the illuminance detecting unit 1 every certain time determined by the timer unit 4, based on the data stored in the memory unit 3, the irradiated When the illuminance detected by the illuminance detection unit 1 is lower than the predetermined range so that the average illuminance of the surface is substantially constant, the speed of the illuminance change when changing to the predetermined range is as follows: Illuminance detected by 1 Characterized in that and a control unit 2 which determine the lighting state of the lighting apparatus 5 to be greater than the rate of variations of the illuminance when the changing in a predetermined range higher than the predetermined range is there.
FIG. 1 shows the basic configuration of the present invention. In the figure, reference numeral 1 denotes an illuminance detection unit, which uses an element capable of detecting brightness such as CdS (cadmium sulfide) or PD (photodiode). Reference numeral 2 denotes a control unit that controls the luminaire 5 in response to an output signal from the illuminance detection unit 1. A plurality of lighting fixtures 5 can be connected to the control unit 2. The control unit 2 receives an input from the illuminance detection unit 1 at certain time intervals, determines what lighting state the lighting fixture 5 is to be turned on, and the lighting fixture so that the determined lighting state is obtained. For example, a dimming signal such as a duty is sent to 5. Reference numeral 3 denotes a memory unit that can store a signal from the illuminance detection unit 1 and a lighting state of the lighting device (for example, a dimming signal such as a duty sent to the lighting fixture 5) by a writing operation from the control unit 2. I can do it. In addition, stored data can be read from the memory unit 3 to the control unit 2. A timer unit 4 sends a certain signal to the control unit 2 every certain time. The timer unit 4 controls the timing at which the control unit 2 detects a signal from the illuminance detection unit 1. This timing is set by the control unit 2. Reference numeral 5 denotes a luminaire, which is connected to the control unit 2 by one or more units and controlled by a dimming signal from the control unit 2.
[0006]
In the configuration as described above, the illuminance detection unit 1 is attached to a place where the reflected light from the irradiated surface can be detected (for example, the ceiling surface), and based on the output signal from the illuminance detection unit 1, The lighting fixture 5 is controlled so that the average illuminance is substantially constant.
[0007]
[Action]
For example, as indicated by the hatched portion in FIG. 2, a certain section of the output of the illuminance detection unit 1 is set as a set illuminance range. If the output of the illuminance detection unit 1 is included in this set illuminance range (V3 to V4), the irradiated surface is maintained at a certain target average illuminance. Also, there are certain setting outputs V2, V1,... Below the lower limit V3 of the set illuminance range, and there are certain setting outputs V5, V6,. It is determined in which range the output of the illuminance detection unit 1 is included, and the control state target of the lighting fixture 5 is determined. Moreover, the lighting change time (fade time) which changes the state of the lighting fixture 5 gradually and changes a control state to a target is also determined. For example, as shown in Table 1, if the output of the illuminance detection unit 1 is included in a predetermined illuminance range V4 to V5, the light output is reduced by D1 over time T1. When the output is included in the set illuminance range V3 to V4, since the set average illuminance is maintained, the illumination state is also maintained as it is. Moreover, when it is included in the predetermined illuminance range V1 to V2, the light output is increased by U2 over time TT2. Such a table may be stored in the memory unit 3.
[0008]
[Table 1]
Figure 0003877342
[0009]
However, in Table 1, there are basically the following relationships between the light reduction amount Dx, the light increase amount Ux, the light reduction time Tx, and the light increase time TTx (x = 1, 2, 3).
| D1 | <| D2 | <| D3 |
| U1 | <| U2 | <| U3 |
| Dx | <| Ux |
| Ux / TTx | <| Dx / Tx | (x = 1, 2, 3)
[0010]
That is, near the set illuminance range, the absolute values of the light reduction amount Dx and the light increase amount Ux are small. Further, the absolute value of the light reduction amount Dx is smaller than the absolute value of the light increase amount Ux. Furthermore, the illuminance change at the time of brightening is faster than the illuminance change at the time of dimming. Thereby, comfortable illumination intensity change is realizable. In other words, when the average illuminance on the surface to be illuminated becomes dark due to an external factor, we want to secure the light quickly, so increase the light output of the illumination quickly, and conversely, when it becomes brighter, do not decrease the light output of the illumination. Don't do it, but if you reduce it suddenly, it will feel strange, so reduce it more slowly than when you increase it. By performing such control, it becomes easier for human vision to adapt, so that the average illuminance of the surface to be irradiated can be controlled to be substantially constant, and the uncomfortable feeling when adjusting the illumination can be eliminated.
[0011]
As described above, control is performed based on predetermined parameters. When the following phenomenon occurs, predetermined processing is performed on the parameters.
(1) When the output of the illuminance detection unit 1 jumps over the set illuminance range and vibrates in the same section, for example, when moving from V4 to V5 → V2 to V3 → V4 to V5, the increase / decrease amount of the lighting state of the illumination Reduce some and increase the lighting change time somewhat.
(2) When the output of the illuminance detection unit 1 is far from the set illuminance range and the light output is adjusted, but the next output is further away from the previous time, some amount of increase / decrease in lighting status increase. However, if it diverges to the brighter side, the lighting change time can be left as it is, but if it diverges to the darker side, the lighting change time can be shortened so that the light can be secured quickly. .
[0012]
【Example】
Hereinafter, an embodiment of the present invention will be described. The lighting fixture 5 connected to the control unit 2 is a fluorescent lamp fixture capable of continuously adjusting light in the range of 0 to 100% according to the duty signal, and is turned on 100% when the duty ratio of the duty signal is 100%. In this case, 0% lighting is performed when the duty ratio is 0%. Here, the output from the illuminance detection unit 1 changes in a range of, for example, 0 to 5V, and is an output that can detect a dark state at 0V and a bright state at 5V. Now, for example, it is assumed that the lighting fixture 5 is controlled under the conditions shown in Table 2.
[0013]
[Table 2]
Figure 0003877342
[0014]
The output of the illuminance detection unit 1 is measured at regular intervals (for example, every 30 seconds), and the duty ratio of the dimming signal sent to the luminaire 5 changes according to the output value at that time. For example, when the output of the illuminance detection unit 1 is included in the range of 1.5 to 1.7 V, when the illuminance detection unit 1 is attached to the ceiling, the average illuminance on the desk surface 2 m below is maintained at about 750 lx. Shall. An example of the output of the illuminance detection unit 1 in that case is shown in FIG. Now, at time t 0, the light is lit in a dimming state with a duty ratio of 80%. The output of the illuminance detection unit 1 at time t 1 after 30 seconds was V (t 1 ) = 1.6 [V]. Therefore, the duty ratio of the dimming signal remains 80%. Since the output of the illuminance detection unit 1 at the next time t 2 is V (t 2 ) = 2.0 [V], the duty of the dimming signal is taken over a fade time of 10 seconds based on Table 1. The ratio was reduced to 78% percent. At time t 4 , the output of the illuminance detection unit 1 becomes V (t 4 ) = 2.5 [V], so that the duty ratio of the dimming signal is reduced by -4 over a fade time of 15 seconds. 74%. At time t 7 , the output of the illuminance detection unit 1 is V (t 7 ) = 1.3 [V]. Therefore, a 10-second fade time is applied and the duty ratio is changed from the current 72%. Increase to 76%.
[0015]
Incidentally, even if the control as described above, since the influence of such external light, or the output of the illuminance detection section 1 will vibrate as the time t 0 ~t 4 in FIG. 4, also the time of FIG. 4 sometimes toward the direction of divergence as t 5 ~t 6. In such a case, the lighting constantly becomes brighter or darker, which may cause flickering for those who work under the lighting, and the necessary illuminance may not be secured quickly. Therefore, the following operation is performed by storing the data before the illuminance detection unit 1. First, at time t 0 in FIG. 4, since the output of the illuminance detection unit 1 is V (t 0 ) = 1.6 V, 80% lighting is maintained. At time t 1 , the output of the illuminance detection unit 1 is V (t 1 ) = 1.8 V, and the duty ratio is set to −2 over a fade time of 10 seconds so that the lighting is 68%. Next, at the time t 2 , the output of the illuminance detection unit 1 is V (t 2 ) = 1.1 V, and the duty ratio is +4 over a fade time of 10 seconds to turn on 72%. At time t 3 , V (t 3 ) = 1.9 V, and vibration is caused by controlling with time t 1 and t 2 . Therefore, the change amount of the duty ratio is set to -1.6 of -2 × 80%, and the fade time is set to 12 seconds of 10 seconds × 120%. Therefore, the lighting changes to 70.4% over a fade time of 12 seconds. At time t 4 , since it is within the set value, 70.4% lighting is maintained.
[0016]
Next, at the time t 5 , the output of the illuminance detection unit 1 is V (t 5 ) = 2.5 V, and is changed to 66.4% lighting in a fade time of 15 seconds. At time t 6 , V (t 6 ) = 3.0 V, and although the duty ratio is lowered at time t 5 , it is detected bright, so the duty ratio is −4 × 160% −6. 4 and reduce the fade time to 15 seconds and change to 60% lighting. At time t 7 , V (t 7 ) = 1.9 V, and the fade time is 10 seconds, −2 is changed to 58% lighting. At time t 8 , since it is within the set value, 58% lighting is maintained. At time t 9 , V (t 9 ) = 2.0 V, the fade time is 10 seconds, the duty ratio is −2, and 56% lighting is maintained. At time t 10 , V (t 10 ) = 1.3 V, the duty ratio is set to +4 in 10 seconds, and the lighting is changed to 60%. At time t 11 , V (t 11 ) = 2.1 V, and the duty ratio is changed to −2 × 0.8 = −1.6 at 10 × 1.2 = 12 seconds, and the lighting changes to 58.4%. Let At time t 12 , V (t 12 ) = 1.4 V, and since vibrations occur at times t 10 , t 11 , and t 12 , 60% of +4 is set to +2.4, and the fade time is 10 seconds 105. % Is changed to 60.8% lighting for 10.5 seconds. At time t 13, since it is within the setting value, to hold the lighting 60.8%. At time t 14 , V (t 14 ) = 0.9 V, and +7 at a fade time of 18 seconds is changed to 67.8% lighting. At time t 15 , although the duty ratio is increased at time t 14 , V (t 15 ) = 1.1 V between 0.8 and 1.2 V is still obtained, so the duty ratio is + 7 × 170%. +11.9 and the fade time is set to 14.4 seconds of 18 × 0.8 to change to 79.7% lighting. At time t 16 , although the duty ratio is increased at time t 15 , V (t 16 ) = 1.35 V and still does not fall within the set value, so +4, 150% of +6, and the fade time is 10 It is changed to 85.7% lighting as 8 seconds of seconds × 0.8. At time t 17 , V (t 17 ) = 1.8 V, so that the duty ratio is decreased by −2 with a fade time of 10 seconds and changed to 83.7% lighting. At time t 18 and time t 19 , since it is within the set value, lighting with a duty ratio of 83.7% is maintained.
[0017]
【The invention's effect】
According to the first aspect of the present invention, for example, a work surface such as a desk top surface can be kept substantially at a certain average illuminance. By using this apparatus, unnecessary light output by artificial lighting can be omitted. Therefore, the difference in light output due to secular changes such as fluorescent lamps can be eliminated, and daylight etc. can be used effectively, improving the energy saving effect and reducing the flicker and illuminance difference every hour, so it is preferable viewing environment Is obtained. Furthermore, when the average illuminance of the surface to be illuminated becomes dark due to an external factor, we want to secure the light quickly, so increase the light output of the illumination quickly, and conversely, when it becomes brighter, do not decrease the light output of the illumination. Although it is not good, if you reduce it suddenly, there is a sense of incongruity, so it is easier to adapt to human vision by controlling it to decrease more slowly than when increasing it, so the average illuminance on the irradiated surface is controlled almost constant In addition, it is possible to eliminate a sense of incongruity when adjusting the lighting, thereby realizing a comfortable change in illuminance.
[0018]
Further, if controlled under the conditions as in claim 2, it is possible to prevent the light output of the illumination from repeatedly increasing and decreasing to prevent flickering, and if controlled under the conditions as in claim 3 , the light output of the illumination is increased. Divergence in the direction or decreasing direction can be prevented.
[Brief description of the drawings]
FIG. 1 is a block circuit diagram of the present invention.
FIG. 2 is an explanatory diagram showing a relationship between an output of an illuminance detection unit and illumination control according to the present invention.
FIG. 3 is an operation explanatory diagram of the first embodiment of the present invention.
FIG. 4 is an operation explanatory diagram of a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Illuminance detection part 2 Control part 3 Memory part 4 Timer part 5 Lighting fixture

Claims (3)

照明器具と、
照明器具の被照射面からの反射光を検出できる場所に配置され、照明器具により照明される環境の照度を検出できる照度検出部と、
照度検出部からの出力信号を受けるタイミングを制御するタイマ部と、
照度検出部からの出力信号及び照明器具の点灯状態を記憶し得るメモリ部と、
タイマ部により決定される或る一定時間ごとに照度検出部から入力されるデータと、メモリ部に記憶されたデータに基づいて、被照射面の平均照度がほぼ一定になるように、且つ、照度検出部により検出された照度が所定の範囲よりも低い場合に前記所定の範囲に変化させるときの照度変化の速度は、照度検出部により検出された照度が前記所定の範囲よりも高い場合に前記所定の範囲に変化させるときの照度変化の速度よりも大きくなるように照明器具の点灯状態を決定する制御部とからなることを特徴とする照明装置。
Lighting equipment,
An illuminance detector that is arranged in a place where the reflected light from the illuminated surface of the luminaire can be detected and can detect the illuminance of the environment illuminated by the luminaire,
A timer unit for controlling the timing of receiving an output signal from the illuminance detection unit;
A memory unit capable of storing an output signal from the illuminance detection unit and a lighting state of the lighting fixture; and
Based on the data input from the illuminance detection unit at certain intervals determined by the timer unit and the data stored in the memory unit, the average illuminance of the irradiated surface is substantially constant and the illuminance When the illuminance detected by the detection unit is lower than the predetermined range, the speed of the illuminance change when the illuminance detected by the illuminance detection unit is higher than the predetermined range. A lighting device comprising: a control unit that determines a lighting state of the lighting fixture so as to be larger than a speed of change in illuminance when changing to a predetermined range.
前記制御部は、照度検出部の出力が所定の照度範囲を飛び越えて同じ区間を振動する場合には、照明の点灯状態の増減量を小さくすると共に、照明の変化時間を増加させるように制御する制御部であることを特徴とする請求項1記載の照明装置。 Wherein, when the output of the illumination detection unit vibrates the same section to jump over a predetermined illuminance range, as well as reduce the amount of increase or decrease the lighting state of the illumination is controlled so as to increase the change time of the lighting The lighting device according to claim 1, wherein the lighting device is a control unit . 前記制御部は、照度検出部の出力が所定の照度範囲から離れていて、光出力を調整したにもかかわらず、照度検出部の出力が前回よりも離れている場合には、照明の点灯状態の増減量を増加させ、照度検出部の出力が前回よりも低い方へ離れている場合には照明の変化時間を短くするように制御する制御部であることを特徴とする請求項1記載の照明装置。 When the output of the illuminance detection unit is far from the previous time even though the output of the illuminance detection unit is far from the previous time even though the output of the illuminance detection unit is away from the predetermined illuminance range and the light output is adjusted, the control unit 2. The control unit according to claim 1 , wherein the control unit is configured to increase an increase / decrease amount of the illumination and to control the illumination change time to be shortened when the output of the illuminance detection unit is lower than the previous time. Lighting device.
JP05636695A 1995-03-15 1995-03-15 Lighting device Expired - Lifetime JP3877342B2 (en)

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JP3893733B2 (en) * 1998-04-22 2007-03-14 松下電工株式会社 Lighting device
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