JP2834822B2 - Variable color discharge lamp lighting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a variable color discharge lamp lighting device that changes the color temperature of a fluorescent lamp.

[Prior Art] Fluorescent lamps of a plurality of different colors (color temperatures) (for example, R,
G, B lamps, etc.) to freely change the emission color can be achieved by arbitrarily dimming each lamp, as shown in JP-A-61-158608. It is a target. In addition, a technology for dimming light with a constant light color using a combination of similar lamps is also disclosed in
No. 148799.

[Problems to be Solved by the Invention] In recent years, comfort has been pursued in living spaces, and in lighting, not only the change of brightness but also the color of light has been changed at the same time to enjoy the atmosphere. It has become to. Conventionally, when the white light is changed from full lighting (large light quantity) to dimming (small light quantity), it is difficult to change the atmosphere even if the brightness is changed. On the other hand, when dimming (decreasing the lamp current) such as HID (high-intensity discharge lamp), the light color changes due to the properties of the lamp, but the atmosphere changes and the color tone does not become comfortable.

The present invention has been provided in view of the above points,
An object of the present invention is to provide a variable-color discharge lamp lighting device that aims to create a comfortable light space by combining color discharge lamps having different emission colors and changing the color temperature during full lighting and dimming to create an atmosphere. .

[Means for Solving the Problems] The present invention sets a high color temperature when the discharge lamp is fully lit,
At the time of dimming, control means for setting the color temperature low and making the color temperature level variable is provided.

[Operation] The control means sets the color temperature high when the discharge lamp is fully lit, sets the color temperature low during dimming, and varies the color temperature level.

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a specific circuit diagram. The output of the inverter I, which operates using the light current power supply, is converted to DC by the rectifier DB. A series circuit of the lamp 1 and the transistor Q _1, and a series circuit of the lamp 2 and the transistor Q ₂ is connected to each parallel to an output end of the rectifier DB.

The lamp 1 is a fluorescent lamp having a high color temperature, for example, a daylight color lamp having a color temperature of 6700K. The lamp 2 is a fluorescent lamp having a low color temperature, for example, a light bulb color lamp having a color temperature of 3000K. To the base of the transistor Q _2, the resistance R _1,
R _2, astable multivibrator of charge and discharge time determined by capacitor C ₁ waveform as shown in FIG. 2 (hereinafter astable called) 5 (a) is input. Transistor Q ₂
The output of the monostable multivibrator (hereinafter referred to as monostable multivibrator) 6 triggered by the third output pin of the astable multi 5 is input to the base of the non-stable multi 5. In addition, volume
Control means is constituted by Vr, capacitor C ₃ , astable multi 5, monostable multi 6, and the like.

During full lighting, taking a large value of the volume Vr for monostable time setting, by slowing the charging speed of the volume Vr and the capacitor C _3, a large input signal having a duty ratio as shown in FIG. 2 (b) Become. Also, at the time of dimming, by reducing the value of the volume Vr,
The input signal has a small duty ratio as shown in FIG.

Therefore, at the time of full lighting, the output of the lamp (fluorescent lamp having a high color temperature) 1 increases, so that the total color temperature also increases. On the contrary, at the time of dimming, the output of the lamp 1 decreases. Becomes lower.

By adopting such a configuration, the color temperature can be raised during full lighting to produce a cool feeling, and the color temperature can be lowered during dimming to produce a warm color feeling, creating a comfortable light space. it can. In addition, with only one volume Vr, all lighting,
Color setting at the time of dimming can be performed.

Embodiment 2 FIG. 3 shows another embodiment. Lamps 1-3 are R
(Red), G (green) and B (blue) fluorescent lamps.
The non-stable multi 5 is used as a trigger for determining the cycle of the monostable multis 6 and 7. Pins 6 and 7 of the monostable multi 6 are connected to the volume Vr and the capacitor C ₃ as shown in FIG.
The charging waveform voltage is determined by The comparator 9 includes a voltage Vb obtained by dividing the power supply voltage Vcc by resistors R ₁ and R ₂ , and a capacitor C ₃
And the output is as shown in FIG. 4 (d). The comparator 8 compares the voltage Va divided by the resistors R ₃ and R ₄ with the voltage across the capacitor C ₃ , and the output is as shown in FIG. 4C. FIG. 4 (e)
The output b (FIG. 4 (b)) of the monostable 6 and an output taking a logical product of an inverted signal by an inverter gate G ₁ output c of the comparator 8 at the AND gate G _2.
The monostable multi 7 is synchronized with the monostable multi 6, and its output has the waveform shown in FIG. 4 (f). FIG. 4 (g) shows the output f of the monostable multi 7 and the AND gate G _2.
And the inverted signal by an inverter gate G ₃ of the output e in the AND gate G ₄ is a signal which a logical product.

And Thus, the base of the transistor Q ₁ to Q ₃ connected in series lamp 1-3, Fig. 4 (g), (d), the signal g, d, e are respectively input as shown in (e) , R, G, and B lamps 1 to 3 are turned on, and a light color of a certain color temperature is obtained as a total.

Now, in Figure 3, increasing the value of the volume Vr, also when the value of the resistor R ₁ is increased, 6 and 7 of the monostable 6
Since the input speed of the pin is slow, the waveform shown by the thick solid line in FIG. 5A is obtained, and the output of the monostable multi 6 becomes as shown in FIG. Become. Further, by increasing the value of resistor R _1, since the level of the voltage Vb drops, the transistor Q ₂
The input signal d has a large duty as shown in FIG. That is, the G signal of the lamp 2 increases.
Furthermore, since the value of the input signal e also volume Vr of the transistor Q ₃ is increased, the duty is increased as shown in FIG. (E), B signals of the lamp 3 is increased. Conversely, as the duty of the signal e increases, the duty of the signal g decreases as shown in FIG. 9G, and the R signal of the lamp 1 decreases. As described above, the R signal is small,
The larger the G and B signals, the higher the color temperature and the higher the output (illuminance level). Since G (green) has the largest luminous flux of the lamp, increasing G increases the total luminous flux even if R and B are slightly reduced.

Then, contrary to the above, Poryumu Vr, when both reduce the value of the resistor R _1, is reversed to the above-described waveform, duty signal d is small, the duty signal e is small, the duty signal g is The signal becomes large, only the R signal becomes large, and the G and B signals become small. As a result, the color temperature decreases and the output also decreases.

Further, in relation to the ambient temperature, it is possible to set the color temperature at the time of full lighting and dimming by the combinations shown in Table 1 below, and similarly, it is possible to produce a comfortable light space.
6 (a) shows a case where the ambient temperature is high, FIG. 6 (b) shows a case where the ambient temperature is room temperature, and FIG. 6 (c) shows a case where the ambient temperature is low. In particular, when the ambient temperature is room temperature, the amount of light can be changed, that is, the color temperature can be changed between full lighting and dimming.

Further, it may be set as shown in Table 2.

FIG. 7 shows a specific diagram in this case, wherein FIG. 7 (a) shows the time of dimming and FIG. 7 (b) shows the time of full lighting. In this case, the color temperature is changed according to the ambient temperature regardless of the full lighting or the light control.

In the embodiment, each lighting device is controlled by changing the duty of one signal and the duty of the three signals. However, independent lighting devices may be used. It goes without saying that a method of controlling the phase of each independent lighting device or a method of controlling the transmission frequency may be used. Furthermore, the opposite concept of lowering the color temperature during full lighting and increasing the color temperature during dimming is not preferable because it is contrary to the psychology of human beings and the atmosphere becomes worse.

Regarding the structure of the fluorescent lamp, R, G and B are not only completely independent lamps, but also the discharge paths as shown in FIG. 8 are independent. good. In such a structure, the lamp itself can be made compact, and the color mixing when a plurality of lamps are used is improved. In addition, in FIG.
Are arranged in the same direction, R, G, and B phosphors are applied to the lamps 1 to 3, and a white phosphor is applied to the lamp 4 having a common discharge path and a common cathode 4a.

FIG. 9 shows another embodiment of the fluorescent lamp. In this case, the lamps 1 to 3 are coated with phosphors of R, G and B,
Is provided with a partition plate 4b for partitioning the inside into three parts, and R, G, and B phosphors are applied separately.

[Effect of the Invention] As described above, the present invention is provided with the control means for setting the color temperature high when the discharge lamp is fully lit, setting the color temperature low during dimming, and making the color temperature level variable. Therefore, the control means sets the color temperature high when the discharge lamp is fully lit,
At the time of dimming, the color temperature can be set low and the color temperature level can be made variable.
Since the color temperature is lowered during dimming, an effect that can create a comfortable atmosphere that matches the psychology of a human being like never before is achieved.

According to a second aspect of the present invention, when the ambient temperature is in a normal temperature range, the color temperature is increased during full lighting, the color temperature is reduced during dimming, and the color temperature is decreased both during full lighting and dimming at low temperatures.
When the temperature is high, the color temperature is set high both during full lighting and during dimming, so that the color temperature can be changed according to the ambient temperature, and a comfortable light space can be produced.

Furthermore, in the third aspect, the color temperature is lowered when the ambient temperature is low in both full lighting and dimming, and the color temperature is raised when the ambient temperature is high. By changing the color temperature, a comfortable light space can be produced.

[Brief description of the drawings]

FIG. 1 is a specific circuit diagram of an embodiment of the present invention, FIG. 2 is an operation waveform diagram of the above embodiment, FIG. 3 is a specific circuit diagram of another embodiment of the embodiment,
FIG. 4 is an operation waveform diagram of the above, FIG. 5 is an operation waveform diagram when the color temperature is changed, FIGS. 6 (a) to (c) are explanatory diagrams of the above, and FIG. 7 (a). (B) is an explanatory view of the above, and FIG.
The figure is a perspective view of another embodiment of the fluorescent lamp of the above, and FIG. 9 is a perspective view of a main part of another embodiment of the fluorescent lamp of the above. 1-3 are lamps, 5 is an astable multivibrator, and 6 is a monostable multivibrator.

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Claims (3)

(57) [Claims] 1. A variable color discharge lamp lighting device that lights up using two or more discharge lamps having different emission colors, wherein the color temperature is set high when the discharge lamps are fully lit, and the color temperature is set during dimming. A variable color discharge lamp lighting device, comprising a control means for setting a low color temperature and varying a color temperature level. 2. When the ambient temperature is in a normal temperature range, the color temperature is increased during full lighting, the color temperature is reduced during dimming, the color temperature is reduced both at full lighting and dimming at low temperatures, and the color temperature is reduced at high temperatures. 2. The variable color discharge lamp lighting device according to claim 1, wherein the color temperature is set high both during lighting and dimming. 3. The variable color discharge device according to claim 1, wherein the color temperature is lowered when the ambient temperature is low, and the color temperature is high when the ambient temperature is high, in both full lighting and dimming. Lighting device.