JPH0151880B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a fluorescent lamp lighting device used as an illumination light source.

[Background technology]

Conventionally, when trying to easily change the light color with a lighting device using fluorescent lamps, it is necessary to replace a plurality of fluorescent lamps l ₁ and l ₂ with different emission colors as shown in Fig. 6, or to change the light color in advance as shown in Fig. 7. This was achieved by using a lighting device that combined a fluorescent lamp L and an incandescent light bulb L, as shown in the figure, and switching the switch SW.
In addition, in cases beyond that, the only method available is a complicated and expensive stage lighting method in which a plurality of fluorescent lamps with different emission colors are dimmed (electronically controlled) individually or in conjunction with each other. Note that the fluorescent lamp starting device is omitted in FIGS. 6 and 7. Further, a current limiting element Bl constituting a ballast is connected between the alternating current power supply AC and the fluorescent lamp _l1 or l.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a fluorescent lamp that uses an ordinary current limiting element and whose emission color can be easily changed at low cost by simply operating a switch. To provide lighting devices.

[Disclosure of the invention]

Embodiment 1 FIG. 1 shows the configuration of Embodiment 1, in which two fluorescent lamps l ₁ , Bl 2 and two current _- limiting elements Bl ₁ ,
The fluorescent lamps _l2 are connected in series via the selection switch _SW0 to form a two-lamp parallel lighting circuit, and one fluorescent lamp _l1 has the color temperature shown on the XY chromaticity diagram in Figure 2. The color temperature of the orange-white fluorescent lamp is approximately 2000〓 (point A), and the color temperature of the other fluorescent lamp l ₂ is approximately 7000〓.
Using blue-white fluorescent lamps (point B), current-limiting element Bl ₁ has a smaller impedance than Bl ₂ ,
The impedances of each fluorescent lamp l ₁ or l ₂ are set in advance so that when the fluorescent lamp l ₁ or l 2 is turned on via the current-limiting element Bl ₁ , the luminous flux is about twice as much as that of the current-limiting element Bl 2. The fluorescent lamps l ₁ and l ₂ are arranged integrally so that when emitting light, the colors of each other's emitted light are combined to form a single light color.

Therefore, the changeover selection switch SW ₀ of the two-way changeover
Assuming that each combination of current-limiting element Bl ₁ and fluorescent lamp l ₁ and current-limiting element Bl ₂ and fluorescent lamp l ₂ is selected by operating , the amount of luminous light from fluorescent lamp l ₁ is The amount of visible light is approximately four times that of ₂ .

In other words, the difference in luminous flux between fluorescent lamps l ₁ and l ₂ is originally twice, and according to the luminous efficiency curve for the spectrum, the luminous color of 2000〓 (approximately 60nm wavelength <specific luminous efficiency 0.6>) is 7000〓 (approximately 500nm wavelength). Wavelength <relative luminous sensation 0.3>)
Since the amount of light is approximately twice as large as that of 1, the amount of visible light is approximately 4 times as much as described above. As a result, the combined light color exhibits a light bulb color (warm white) around 2500 to 3000, as shown in Figure 2.

Next, switch the changeover selection switch SW ₀ , and
Bl ₁ and fluorescent lamp l ₂ , current limiting element Bl ₂ and fluorescent lamp l ₁
If the combination is set, the amount of light from the fluorescent lamp _l1 and the amount of light from the fluorescent lamp _l2 will be equal. That is, although the luminous flux is reversed from the above case, the luminous sensitivity difference remains the same, so the luminous luminous intensity becomes the same. As a result, the combined luminescent color is 4000〓 as shown in Figure 2.
It will exhibit a white color of ○○○.

Note that a desired composite emission color can be obtained by freely selecting the color temperature of the emission color of the fluorescent lamps l ₁ and l ₂ and the impedance difference between the current limiting elements, and the present invention is not limited to the above example.

Example 2 FIG. 3 shows Example 2. In this example, three fluorescent lamps l ₁ to l ₃ are used, and the XY
As shown on the chromaticity diagram, fluorescent lamp _l1 is an R (orange) color fluorescent lamp with a wavelength of 600 nm (point C), and fluorescent lamp _l2 is a G (green) color fluorescent lamp with a wavelength of 515 nm (point D). Fluorescent lamp _L3 uses a B (blue) color fluorescent lamp with a wavelength of 480 nm (point E). In addition, three current-limiting elements Bl ₁ to _{Bl 3} are included in the current-limiting element.
The impedance of each fluorescent lamp is ₁
For each combination of current-limiting element Bl ₁ , fluorescent lamp l ₂ and current-limiting element Bl ₂ , fluorescent lamp l ₃ and current-limiting element Bl ₃ , abbreviated.
It is set so that the white color of 5000〓 (○A' point) is synthesized. That is, the light amount ratio of R:G:B → 2:1:
The impedance ratio of Bl ₁ :Bl ₂ :Bl ₃ is set to approximately 3:6:2 so that the impedance ratio becomes 1. (600nm: 515n
m:480nm specific luminous efficiency = 0.6:0.6:0.2) Then the following combinations are Bl ₁ → l ₂ , Bl ₂ → l ₁ , Bl ₃ → l ₃
When the selection switch SW ₀ is changed so that the ratio of the R:G:B light amount becomes approximately 1:2:1, a green-white color with a strong greenish tinge (circle mark) is exhibited.

Next, when the selection switch SW is changed so that the combinations become Bl ₁ -l ₃ , Bl ₂ -l ₂ , Bl ₃ -l ₁ , R:G:
The light intensity ratio of B is approximately 3:1:0.7, and the light bulb becomes white at about 3000〓 (○C' point).

In addition, the color temperature of these three sets of fluorescent lamps l ₁ , l ₂ , and l ₃ can be set to 2000〓, 4500〓, for example, while maintaining the white tone.
If you choose it to be divided into three levels, 7000〓,
The color temperature can be changed more precisely from warm white to cool white using a white base.

Although each embodiment uses _different fluorescent lamps, as shown in _{FIG .} It is also possible to use a fluorescent lamp l whose tube walls ′ and l ₂ ′ are coated with phosphors of different emission colors. You may also use direct current lighting.
In this case, resistors are used for the current limiting elements Bl ₁ ′ and Bl ₂ ′.

〔Effect of the invention〕

As described above, the present invention integrates a plurality of fluorescent lamps with different luminescent colors so that the luminescent colors of these fluorescent lamps are combined to form one luminescent color, and the fluorescent lamps are arranged in a manner that corresponds to the number of fluorescent lamps. Parallel lighting that is equipped with a plurality of current-limiting elements each having a different impedance and a changeover selection switch that can arbitrarily select and switch combinations of fluorescent lamps and current-limiting elements, and lighting each combination of fluorescent lamps and current-limiting elements in parallel. Since the circuit is formed, it is possible to obtain an extremely simple and low-cost fluorescent lamp lighting device with variable light color, which does not require a special electronic control circuit and only requires a combination of an ordinary current-limiting element such as a chiyoke coil and a switch. The lighting atmosphere can be changed easily and at low cost by changing the mood between night and day, depending on high and low temperatures, or sunny and rainy days.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram of Embodiment 1 of the present invention, and FIG.
The figure is an explanatory diagram of the operation (light color) of the same as above, FIG. 3 is a circuit configuration diagram of the second embodiment of the present invention, FIG. 4 is an explanatory diagram of the same operation, and FIG. 5 is the circuit configuration of the third embodiment of the present invention. figure,
FIGS. 6 and 7 are diagrams of conventional examples, respectively, where l ₁ to _{l 3} are fluorescent lamps, Bl ₁ to _{Bl 3} are current limiting elements, AC is an alternating current power supply, and SW ₀ is a changeover selection switch.

Claims (1)

[Claims] 1. A plurality of fluorescent lamps each emitting different colors are integrally arranged so that the emitted light colors of these fluorescent lamps are combined to form one emitted color, and the number of fluorescent lamps corresponds to the number of fluorescent lamps. Parallel lighting that is equipped with a plurality of current-limiting elements each having a different impedance and a changeover selection switch that can arbitrarily select and switch combinations of fluorescent lamps and current-limiting elements, and lighting each combination of fluorescent lamps and current-limiting elements in parallel. A fluorescent lamp lighting device characterized by forming a circuit. 2.Equipped with two different fluorescent lamps and two current limiting elements, each fluorescent lamp has a white emission color and has a different color temperature, so that when the fluorescent lamp and current limiting element are combined using a selection switch, one 2. The fluorescent lamp lighting device according to claim 1, wherein the impedance of each current limiting element is set so that one of the current limiting elements has a warm white color and the other has a relatively cool white color. 3.Equipped with three different sets of fluorescent lamps and current-limiting elements, each fluorescent lamp has a white emission color and has a different color temperature, and six sets of fluorescent lamps and current-limiting elements can be selected using a selection switch. 2. The fluorescent lamp lighting device according to claim 1, wherein the impedance of each current limiting element is set in advance so that the color temperature changes stepwise from warm white to cool white when combined. 4. The fluorescent lamp lighting device according to claim 1, comprising three sets of fluorescent lamps and three current-limiting elements, each of which emits light in red, green, and blue.