JP3198541B2 - lighting equipment - Google Patents
lighting equipmentInfo
- Publication number
- JP3198541B2 JP3198541B2 JP18277591A JP18277591A JP3198541B2 JP 3198541 B2 JP3198541 B2 JP 3198541B2 JP 18277591 A JP18277591 A JP 18277591A JP 18277591 A JP18277591 A JP 18277591A JP 3198541 B2 JP3198541 B2 JP 3198541B2
- Authority
- JP
- Japan
- Prior art keywords
- color temperature
- lamp
- light
- dimming
- low
- 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.)
- Expired - Lifetime
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、照明器具に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture.
【０００２】[0002]
【従来の技術】住宅のリビング空間等において、雰囲気
に応じて部屋全体の明るさを変えたいという要望は多
い。一般に住宅空間では、読み書きや家事（裁縫、アイ
ロン掛け等）といった作業効率を重視した作業をする場
合には、高い照度が望まれ、反面、お酒を飲んだり、ゆ
っくりくつろぐには低い照度が望まれる。2. Description of the Related Art In a living space of a house or the like, there are many requests to change the brightness of the whole room according to the atmosphere. Generally, in a residential space, high illuminance is desired when performing work that emphasizes work efficiency such as reading and writing and housework (sewing, ironing, etc.). On the other hand, low illuminance is desired for drinking or relaxing slowly. It is.
【０００３】従来の照明器具（第１の従来例）は、ラン
プである複数の蛍光ランプを具備してなり、それらの蛍
光ランプが点滅制御されたり、全ての蛍光ランプが一律
に調光制御され、室内照度を変化させる構成とされてお
り、その蛍光ランプは、同種類で同出力のランプが複数
本用いられたものと、同種類で出力の異なるランプを複
数本用いたものとがあった。A conventional luminaire (first conventional example) is provided with a plurality of fluorescent lamps as lamps, and the fluorescent lamps are controlled to blink or all the fluorescent lamps are uniformly dimmed. The fluorescent lamps are configured to vary the indoor illuminance, and there are two types of fluorescent lamps, one using a plurality of lamps of the same type and the same output, and the other using a plurality of lamps of the same type and different outputs. .
【０００４】また、従来の別の照明器具（第２の従来
例）として、ランプとして蛍光ランプと白熱ランプの両
方を具備し、それらを同時に点灯させ、それらに調光器
を接続して、蛍光ランプと白熱ランプのそれぞれを別々
に調光して、室内照度を変化させる構成としたものがあ
った。As another conventional luminaire (second conventional example), both a fluorescent lamp and an incandescent lamp are provided as lamps, and they are simultaneously turned on. There has been a configuration in which the lamp and the incandescent lamp are individually dimmed to change the indoor illuminance.
【０００５】[0005]
【発明が解決しようとする課題】一般に、高い照度の空
間では、光の色温度が高いと人間には、視覚的に明るく
感じ、光の色温度が低いと全体がぼやけたような締まり
のない空間になってしまう。一方、低い照度の空間で
は、光の色温度が高いと人間には、暗くて陰気な感じを
与え、光の色温度を低くすると暗さを感じずに落ち着い
た雰囲気となる。このため、住宅のリビング等の空間の
照明器具としては、その光が、目的に応じて高照度時に
は高色温度で、低照度時には低色温度であることが望ま
しい。Generally, in a high illuminance space, if the color temperature of light is high, humans will feel visually bright, and if the color temperature of light is low, the whole will not be blurry and tight. It becomes a space. On the other hand, in a space with low illuminance, a high color temperature of light gives a person a dark and gloomy feeling, and a low color temperature of light results in a calm atmosphere without feeling darkness. For this reason, it is desirable for the lighting equipment in a space such as a living room of a house to have a high color temperature at high illuminance and a low color temperature at low illuminance according to the purpose.
【０００６】ところが、上述のように構成された第１の
従来例に示す照明器具においては、照度を調節すること
はできるが、色温度の調節ができず、このため、目的に
適した照明空間が得られず、照度レベルによっては陰気
さやぼやけた感じを感じさせるという問題点があった。However, in the lighting apparatus shown in the first conventional example configured as described above, the illuminance can be adjusted, but the color temperature cannot be adjusted. However, there is a problem that depending on the illuminance level, the user may feel insidious or blurry.
【０００７】また、前記第２の従来例に示す照明器具に
おいては、照度及び色温度を利用者の好みにあわせて調
整可能であるという利点は有するが、その反面、利用者
は蛍光ランプと白熱ランプの両方をそれぞれ別々に、し
かも適度に調光する必要があり、照度レベルに適した色
温度となる状態に、容易に、あるいは自動的に調光比率
を調整することは極めて困難であり、さらには、蛍光ラ
ンプによる器具配光と白熱ランプによる器具配光とが異
なるため、色温度を変化させようとすると器具全体の配
光まで変化し、部屋内の明るさの分布まで変化してしま
うという問題点があった。Further, the lighting apparatus shown in the second conventional example has an advantage that the illuminance and the color temperature can be adjusted according to the user's preference, but on the other hand, the user has to use a fluorescent lamp and an incandescent lamp. Both lamps need to be separately and appropriately dimmed, and it is extremely difficult to easily or automatically adjust the dimming ratio to a state where the color temperature is suitable for the illuminance level. Furthermore, since the device light distribution by the fluorescent lamp is different from the device light distribution by the incandescent lamp, when the color temperature is changed, the light distribution of the entire device changes, and the distribution of brightness in the room also changes. There was a problem.
【０００８】本発明は、前記背景に鑑みてなされたもの
であり、その目的とするところは、目的に応じた照明空
間が容易に得られ、どの照度レベルによっても陰気さや
ぼやけた感じを感じさせない雰囲気が演出できる照明器
具を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and an object of the present invention is to provide an illumination space suitable for the purpose, and to prevent the user from feeling insidious or blurry at any illuminance level. An object of the present invention is to provide a lighting device that can produce an atmosphere.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するため
本発明は、色温度の異なる複数の蛍光ランプを具備し、
調光機能を有して明るさの調整を行なう照明器具におい
て、前記蛍光ランプのうち色温度の高い高色温度側のラ
ンプの調光比率を、それより色温度の低い他の低色温度
側のランプの調光比率よりも大きくし、明るさの調整時
に高照度のときに高い色温度、低照度のときには低い色
温度となるよう照度レベルと色温度とを相関させてなる
ことを特徴とするものである。In order to solve the above problems, the present invention comprises a plurality of fluorescent lamps having different color temperatures,
In a lighting fixture having a dimming function to adjust the brightness, of the fluorescent lamps, the dimming ratio of a high color temperature side lamp having a high color temperature may be changed to another low color temperature side having a lower color temperature. When adjusting the brightness by making it larger than the dimming ratio of the lamp
High color temperature at high illuminance, low color at low illuminance
The illuminance level and the color temperature are correlated so as to obtain a temperature.
【００１０】[0010]
【作用】本発明における照明器具においては、低色温度
側の蛍光ランプの調光範囲は比較的狭く、調光して光を
絞り込んでもあまり光量は落ちず、一方、高色温度側の
蛍光ランプの調光範囲は広く、調光して光を絞り込んだ
場合、光はほとんど出なくなる。その結果、光出力の大
きい状態、すなわち高照度の状態では、色温度の高い光
の比率が大きく、部屋全体の演出光の色温度は高くなっ
て、高照度において高色温度の雰囲気が演出でき、逆
に、調光して光出力を絞り込むと、色温度の低い光の比
率が大きくなり、部屋全体の演出光の色温度は低くなっ
て、低照度において低色温度の雰囲気が演出できる。In the lighting apparatus according to the present invention, the dimming range of the fluorescent lamp on the low color temperature side is relatively narrow, so that even if the light is squeezed and the light is narrowed down, the amount of light does not decrease so much, while the dimming range is low.
The dimming range of the fluorescent lamp is wide, and when dimming and narrowing down the light, almost no light is emitted. As a result, in a state where the light output is large, that is, in a state of high illuminance, the ratio of light having a high color temperature is large, and the color temperature of the effect light in the entire room is high.
At high illuminance , an atmosphere with a high color temperature can be produced.On the contrary, when the light output is narrowed down by dimming, the ratio of light with a low color temperature increases, and the color temperature of the effect light in the entire room decreases.
Thus , an atmosphere having a low color temperature at low illuminance can be produced.
【００１１】[0011]
【実施例】図１は、本発明の第１の実施例を示すもの
で、同図における照明器具は、ランプである同出力の丸
形蛍光ランプを２本有してなる２灯用の照明器具を示す
もので、同図において上方に配設された蛍光ランプは、
高色温度側のランプ１であり、下方に配設された蛍光ラ
ンプは、低色温度側のランプ２を示すものである。FIG. 1 shows a first embodiment of the present invention. The lighting fixture shown in FIG. 1 has two round fluorescent lamps of the same output, which are lamps. It shows the equipment, and the fluorescent lamp arranged at the top in the figure is
The fluorescent lamp 1 disposed on the high color temperature side and the fluorescent lamp disposed below represents the lamp 2 disposed on the low color temperature side.
【００１２】この照明器具は、図示はしないが、調光ス
イッチを具備しており、前記高色温度側のランプ１及び
低色温度側のランプ２は、この調光スイッチを操作する
ことにより調光制御される。このとき、それらの蛍光ラ
ンプ１、２の光出力は、それぞれ、たとえば同図(b) に
示すように、高色温度側のランプ１の調光比率が、低色
温度側のランプ２の調光比率よりも大きくなるように設
定されている。つまり、各ランプ１及び２の全点灯時
（調光しない状態：同図において調光信号入力Ｐ）の光
出力を１００とし、調光スイッチをたとえば調光信号入
力Ｑに操作すると、高色温度側のランプ１の光出力（そ
のランプ１の全点灯時を１００とした比率）はＱ１に、
低色温度側のランプ２の光出力（そのランプ２の全点灯
時を１００とした比率）はＱ２となり、調光時には常に
高色温度側のランプ１の調光比率が高くなるようになっ
ている。Although not shown, the luminaire includes a dimming switch, and the high color temperature side lamp 1 and the low color temperature side lamp 2 are dimmed by operating the dimming switch. Light controlled. At this time, the light output of each of the fluorescent lamps 1 and 2 is adjusted so that the dimming ratio of the lamp 1 on the high color temperature side is different from that of the lamp 2 on the low color temperature side, as shown in FIG. It is set to be larger than the light ratio. In other words, when the light output when all the lamps 1 and 2 are fully lit (a state in which no dimming is performed: a dimming signal input P in the figure) is set to 100 and the dimming switch is operated to, for example, the dimming signal input Q, a high color temperature is obtained. The light output of the lamp 1 on the side (ratio of 100 when the lamp 1 is fully lit) is Q1,
The light output of the lamp 2 on the low color temperature side (the ratio with 100 when the lamp 2 is fully lit) is Q2, and the dimming ratio of the lamp 1 on the high color temperature side is always high during dimming. I have.
【００１３】このように構成されているため、本実施例
における照明器具においては、色温度の低い側の蛍光ラ
ンプ（低色温度側のランプ）２の調光範囲は比較的狭
く、調光して光を絞り込んでもあまり光量は落ちず、一
方、色温度の高い側の蛍光ランプ（高色温度側のラン
プ）１の調光範囲は広く、調光して光を絞り込んだ場
合、光はほとんど出なくなる。その結果、光出力の大き
い状態すなわち高照度の状態では、色温度の高い光の比
率が大きく、部屋全体の演出光の色温度は高色温度とな
って、高色温度の雰囲気が演出できるが、逆に、調光し
て光出力を絞り込むと、色温度の低い光の比率が大きく
なり、低照度の状態では部屋全体の演出光の色温度は低
色温度となって、低色温度の雰囲気が演出できる。With such a configuration, in the lighting fixture of the present embodiment, the dimming range of the fluorescent lamp 2 having a lower color temperature (lamp having a lower color temperature) 2 is relatively narrow, and the dimming is performed. Even if the light is narrowed down, the amount of light does not decrease much. On the other hand, the dimming range of the fluorescent lamp 1 with the higher color temperature (the lamp with the higher color temperature) 1 is wide. Will not come out. As a result, in a state where the light output is large, that is, in a state of high illuminance, the ratio of light having a high color temperature is large, and the color temperature of the effect light of the entire room becomes a high color temperature, and an atmosphere with a high color temperature can be produced. Conversely, when dimming and narrowing down the light output, the ratio of light with a low color temperature increases, and in low illuminance conditions, the color temperature of the effect light in the entire room becomes low and low . Atmosphere can be produced.
【００１４】したがって、作業性を重視する場合には、
高照度状態で高色温度のさわやかで明るい照明空間が得
られ、逆にくつろぎや安らぎを求める場合には、調光す
ることにより、低照度状態で低色温度の落ち着いた照明
空間が得られ、目的に応じた照明空間の設定が容易で、
どの照度レベルによっても陰気さやぼやけた感じを感じ
させない雰囲気が演出できる。Therefore, when workability is emphasized,
When a bright and bright lighting space with a high color temperature is obtained in a high illuminance state, and conversely, when relaxation or comfort is required, dimming can provide a calm lighting space with a low color temperature in a low illuminance state. It is easy to set the lighting space according to the purpose,
At any illuminance level, you can create an atmosphere that does not feel insidious or blurry.
【００１５】図２は、本発明の第２の実施例を示すもの
で、前記第１の実施例と異なる点は、高色温度側のラン
プ１の出力を低色温度側のランプ２の出力よりも大きく
した点であり、他は前記第１の実施例と同様に構成され
ている。FIG. 2 shows a second embodiment of the present invention. The difference from the first embodiment is that the output of the lamp 1 on the high color temperature side is changed to the output of the lamp 2 on the low color temperature side. The other configuration is the same as that of the first embodiment.
【００１６】同図においては、高色温度側のランプ１
は、たとえば丸形の３２ｗ又は４０ｗの出力の蛍光ラン
プで、これに対して低色温度側のランプ２が、たとえば
丸形の３０ｗの出力の蛍光ランプとされたものである。In FIG. 1, a lamp 1 on the high color temperature side is shown.
Is a round fluorescent lamp of 32 w or 40 w output, for example, and the low color temperature side lamp 2 is a round fluorescent lamp of 30 w output, for example.
【００１７】このような構成によっても、前記第１の実
施例と同様の効果を奏すると共に、高照度レベルと低照
度レベルの照度比率を大きくでき、全点灯時の空間の色
温度をさらに高色温度側にシフトさせることもできる。With such a configuration, the same effects as those of the first embodiment can be obtained, and the illuminance ratio between the high illuminance level and the low illuminance level can be increased. It can also be shifted to the temperature side.
【００１８】図３は、本発明の第３の実施例を示すもの
で、前記第１の実施例と異なる点は、高色温度側のラン
プ１及び低色温度側のランプ２として、器具本体３の内
部に直管形蛍光ランプを配設した点であり、他は前記第
１の実施例と同様に構成されている。このように構成し
ても、前記第１の実施例と同様の効果を奏する。FIG. 3 shows a third embodiment of the present invention. The difference from the first embodiment is that a lamp 1 on the high color temperature side and a lamp 2 on the low color temperature side are used as the main body of the apparatus. The third embodiment is different from the first embodiment in that a straight tube type fluorescent lamp is disposed inside. Even with such a configuration, the same effects as in the first embodiment can be obtained.
【００１９】なお、前記第３の実施例においては、複数
のランプとして、直感形蛍光ランプに代えて、片口金蛍
光ランプを使用したものであっても良い。In the third embodiment, the single lamp fluorescent lamp may be used as the plurality of lamps instead of the intuitive fluorescent lamp.
【００２０】また、本発明の第４の実施例として、前記
第１、第２及び第３の実施例において、低色温度側のラ
ンプ２を電球色蛍光ランプもしくは温白色蛍光ランプと
して構成したものがある。このような構成によっても、
前記第１の実施例と同様の効果を奏すると共に、低照度
レベルにおいて、電球による照明のような落ち着いた雰
囲気を醸し出すことができる。As a fourth embodiment of the present invention, in the first, second and third embodiments, the lamp 2 on the low color temperature side is configured as a bulb color fluorescent lamp or a warm white fluorescent lamp. There is. With such a configuration,
The same effects as in the first embodiment can be obtained, and at the low illuminance level, a calm atmosphere like lighting by a light bulb can be created.
【００２１】さらには、本発明の第５の実施例として、
前記第３の実施例において、色温度の異なるランプをＲ
（赤）、Ｇ（緑）、Ｂ（青）の三原色ランプとして構成
したものがある。この場合においては、Ｂ（青）のラン
プの調光比率が、他のＲ（赤）、Ｇ（緑）のランプの調
光比率よりも大きく設定され、したがってＢ（青）のラ
ンプの調光幅が他のランプよりも大きくされている。こ
のような構成によっても、前記第１の実施例と同様の効
果を奏する。Further, as a fifth embodiment of the present invention,
In the third embodiment, lamps having different color temperatures are set to R.
Some lamps are configured as three primary color lamps (red), G (green), and B (blue). In this case, the dimming ratio of the B (blue) lamp is set to be larger than the dimming ratios of the other R (red) and G (green) lamps, and thus the dimming ratio of the B (blue) lamp is set. The width is larger than other lamps. With such a configuration, the same effect as in the first embodiment can be obtained.
【００２２】なお、前記第１、第２及び第３の実施例に
おいては、丸形の蛍光ランプを用いた場合に、高色温度
側のランプ１を低色温度側のランプ２の上方に配設した
例を示したが、本考案はこれに限らず、高色温度側のラ
ンプが、低色温度側のランプの下方に配設されたもので
あっても良く、また、使用される丸形の蛍光ランプは２
本に限らず、３本又は４本等の複数本で、その蛍光ラン
プが略同心円状に配設されたものや、それらが同一平面
内に配設されたものであっても良い。In the first, second and third embodiments, when a round fluorescent lamp is used, the lamp 1 on the high color temperature side is arranged above the lamp 2 on the low color temperature side. However, the present invention is not limited to this, and the lamp on the high color temperature side may be disposed below the lamp on the low color temperature side. 2 shaped fluorescent lamps
The present invention is not limited to this, and a plurality of fluorescent lamps, such as three or four, in which the fluorescent lamps are arranged substantially concentrically, or those in which they are arranged in the same plane may be used.
【００２３】[0023]
【発明の効果】本発明における照明器具においては、低
色温度側の蛍光ランプの調光範囲は比較的狭く、調光し
て光を絞り込んでもあまり光量は落ちない。一方、高色
温度側の蛍光ランプの調光範囲は広く、調光して光を絞
り込んだ場合、光はほとんど出なくなる。その結果、光
出力の大きい状態、すなわち高照度の状態では、色温度
の高い光の比率が大きく、部屋全体の演出光の色温度は
高色温度となって、高色温度の雰囲気が演出でき、逆
に、調光して光出力を絞り込むと、色温度の低い光の比
率が大きくなり、部屋全体の演出光の色温度は低色温度
となって、低色温度の雰囲気が演出できる。In the lighting apparatus according to the present invention, the dimming range of the fluorescent lamp on the low color temperature side is relatively narrow, and the amount of light does not decrease much even when dimming and narrowing down the light. On the other hand, the dimming range of the fluorescent lamp on the high color temperature side is wide, and when dimming and narrowing down the light, almost no light is emitted. As a result, in a state where the light output is large, that is, in a state of high illuminance, the ratio of light having a high color temperature is large, and the color temperature of the effect light of the entire room becomes a high color temperature, and an atmosphere with a high color temperature can be produced. Conversely, if the light output is narrowed down by dimming, the ratio of light having a low color temperature increases, and the color temperature of the effect light in the entire room becomes low, so that an atmosphere with a low color temperature can be produced.
【００２４】したがって、作業性を重視する場合には、
高照度状態で高色温度のさわやかで明るい照明空間が得
られ、逆にくつろぎや安らぎを求める場合には、調光す
ることにより、低照度状態で低色温度の落ち着いた照明
空間が得られ、目的に応じた照明空間の設定が容易で、
どの照度レベルによっても陰気さやぼやけた感じを感じ
させない雰囲気が演出できる。Therefore, when workability is emphasized,
When a bright and bright lighting space with a high color temperature is obtained in a high illuminance state, and conversely, when relaxation or comfort is required, dimming can provide a calm lighting space with a low color temperature in a low illuminance state. It is easy to set the lighting space according to the purpose,
At any illuminance level, you can create an atmosphere that does not feel insidious or blurry.
【図１】本発明の第１の実施例を示すもので、(a) はラ
ンプを示す一部断面側面図、(b) は各ランプの調光比率
を示す説明図である。FIGS. 1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a partially sectional side view showing a lamp, and FIG. 1B is an explanatory diagram showing a dimming ratio of each lamp.
【図２】本発明の第２の実施例における要部を示す一部
断面側面図である。FIG. 2 is a partial sectional side view showing a main part according to a second embodiment of the present invention.
【図３】本発明の第３の実施例を示す一部断面側面図で
ある。FIG. 3 is a partially sectional side view showing a third embodiment of the present invention.
１ 高色温度側のランプ ２ 低色温度側のランプ 1 High color temperature lamp 2 Low color temperature lamp
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−301992（ＪＰ，Ａ) 特開 昭62−5599（ＪＰ，Ａ) 特開 昭53−135182（ＪＰ，Ａ) 特開 平３−222291（ＪＰ，Ａ) 特開 平３−222290（ＪＰ，Ａ) 特開 平３−222289（ＪＰ，Ａ) 特開 平４−206391（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H05B 37/00 - 39/10 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-301992 (JP, A) JP-A-65-2599 (JP, A) JP-A-53-135182 (JP, A) JP-A-3-301 222291 (JP, A) JP-A-3-222290 (JP, A) JP-A-3-222289 (JP, A) JP-A-4-206391 (JP, A) (58) Fields investigated (Int. 7 , DB name) H05B 37/00-39/10
Claims (1)
備し、調光機能を有して明るさの調整を行なう照明器具
において、前記蛍光ランプのうち色温度の高い高色温度
側のランプの調光比率をそれより色温度の低い他の低色
温度側のランプの調光比率よりも大きくし、明るさの調
整時に高照度のときに高い色温度、低照度のときには低
い色温度となるよう照度レベルと色温度とを相関させて
なることを特徴とする照明器具。1. A lighting apparatus comprising a plurality of fluorescent lamps having different color temperatures and having a dimming function to adjust brightness, wherein a fluorescent lamp having a higher color temperature and a higher color temperature among the fluorescent lamps. Set the dimming ratio higher than the dimming ratio of other low color temperature lamps with a lower color temperature, so that when adjusting the brightness, the color temperature is higher at high illuminance and lower at low illuminance.
To correlate the illumination level and the color temperature so as to be have color temperature
A lighting device characterized by becoming .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18277591A JP3198541B2 (en) | 1991-07-24 | 1991-07-24 | lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18277591A JP3198541B2 (en) | 1991-07-24 | 1991-07-24 | lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0529083A JPH0529083A (en) | 1993-02-05 |
| JP3198541B2 true JP3198541B2 (en) | 2001-08-13 |
Family
ID=16124204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18277591A Expired - Lifetime JP3198541B2 (en) | 1991-07-24 | 1991-07-24 | lighting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3198541B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT1422975E (en) * | 2000-04-24 | 2010-07-09 | Philips Solid State Lighting | Light-emitting diode based product |
| JP5106049B2 (en) * | 2007-11-02 | 2012-12-26 | シャープ株式会社 | Lighting device and lighting system |
| US8330394B2 (en) * | 2010-04-09 | 2012-12-11 | Young Lighting Technology Inc. | Light source of LED and method for producing light source with varying color while dimming |
-
1991
- 1991-07-24 JP JP18277591A patent/JP3198541B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0529083A (en) | 1993-02-05 |
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