JP3430657B2 - Lighting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device with a variable color temperature, which is capable of obtaining an arbitrary color temperature by dimming a plurality of fluorescent lamps having different color temperatures.

[0002]

2. Description of the Related Art Conventionally, in a variable color discharge lamp lighting device using fluorescent lamps of two or more different colors and different color temperatures,
A control technique in which the output of a fluorescent lamp is substantially constant and only the color temperature of the fluorescent lamp is variable is already a general technique. For example,
As disclosed in JP-A-3-222290, fluorescent lamps having different color temperatures are dimmed to keep the total light output constant, and as disclosed in JP-A-6-44809, daylight color (65
There is known a device for lighting fluorescent lamps of 00K) and warm white (3500K) individually and simultaneously depending on time.

FIG. 14 shows the basic construction of a conventional color matching system. In the figure, 1 is a control unit, 2H and 2L are dimming ballasts,
3H and 3L are lamps and 4 is a lighting fixture. Dimmer 2
H and 2L can individually dimming or blinking a plurality of lamps 3H and 3L having different color temperatures.
The range from the color temperature of to the color temperature of the lamp 3L can be arbitrarily adjusted. Usually, this device has an open bottom surface or a diffusion panel attached to the bottom surface to diffuse colors. The technology to freely change the mixed color by dimming multiple fluorescent lamps with different emission colors is known. Especially, the one with variable color temperature is also used in general space and is suitable for comfort production. , Which is a technology that will attract attention together in the future. Among them, fluorescent lamps with different color temperatures that are more familiar than before, such as light bulb color (3000
K) and daylight color (6700K) and the like are combined to dimming or blinking each.

[0004]

A control technique in which the output of a fluorescent lamp is substantially constant and only the color temperature of the fluorescent lamp is variable, as in the conventional example, is necessary for performing color matching control without a sense of discomfort. Technology. However, the color of two different lamps (e.g., warm white and daylight) when performing the same toning control while changing the dimming ratio of the individual lamps, in order to keep the light beam constant, in FIG. 15 As shown, the relationship of lamp luminous flux (light bulb color) + lamp luminous flux (daylight color) = constant is required. At this time, when the dimmable range is maximized, the minimum color temperature is the bulb color (100%) + daylight color (0%) = constant, and the maximum color temperature is the bulb color (0%). %) + Daylight color (100%) = constant. When the color matching control of the light flux is substantially constant by this control pattern, there is a problem that the output light flux of the entire luminaire always emits only half the light of the equipped lamp. In addition, since the control pattern is fixed to a single, it is difficult to select various illuminance and color temperature required for the illuminated area and to provide the illumination effect suitable for the area.

The present invention has been made in view of the above points, and an object of the present invention is to provide, in addition to a general color-adjusting control pattern with a substantially constant luminous flux, an illumination having a higher output or a lower output than that. An object of the present invention is to provide an illuminating device that enables selection of a toning control pattern according to a space to be rendered and enables illumination production adapted to a wider variety of illumination spaces.

[0006]

1 and 2 show the construction of an illuminating device according to the present invention. In the figure, 11 is a selection key input unit, 12 is an arithmetic unit, 13 is a data table, and 14 is a data table.
Is a dimming controller. Further, 2H and 2L are ballasts for dimming, and 3H and 3L are lamps having different color temperatures. In addition,
Multiple lamps 3H and 3L with different color temperatures are provided.
Has been. In order to change the dimming ratio of each lamp and keep the luminous flux substantially constant, as shown in control patterns a to e of FIG. 3 , lamp luminous flux (bulb color) + lamp luminous flux (daylight color) =
It may be a fixed relationship. By selecting one of the plurality of control patterns a to e with the switch SW, in addition to the general light flux substantially constant toning control pattern c,
A substantially constant toning control pattern d, e or a, b having a higher output or a lower output than that can be obtained.

2A to 2C show an illumination device of the present invention.
It shows the arrangement of the lamps. In the figure, 3L is light bulb color
3H is a daylight color lamp. In the present invention
Is equipped with a plurality of lamps 3L and 3H of two colors,
Characterized by arranging lamps of the same color so that they are not next to each other
I am trying.

In the configurations of FIGS . 1 and 2 , an example in which two kinds of lamps of daylight color and light bulb color are mixed is shown for easy understanding, but a combination of lamps of other colors,
A method of controlling by combining two or more kinds of lamps may be used. Further, the lamps used in these appliances are not limited to the lamps dedicated to high frequency lighting, and other kinds of lamps, wattages, shapes, and combinations may be used.

[0009]

In the configuration example of FIG. 1, in addition to the normal control pattern c, the dimming data of each lamp of the control patterns a and b on the low illuminance side and the control patterns d and e on the high illuminance side are shown in Table 1 in advance. The data table 13 of FIG. 1 is prepared in this manner. The user selects a desired control pattern by pressing the switch SW of the selection key input unit 11, and the signal is detected by the arithmetic unit 12. The arithmetic unit 12 reads out the dimming data that matches the selected control pattern from the data table 13 and sends it to the dimming control unit 14.
The dimming control unit 14 converts the sent dimming data into a dimming signal and sends it to the ballasts 2H and 2L. The dimming signal causes the ballasts 2H and 2L to output the lamps 3H and 3 at a predetermined dimming ratio.
Turn on L.

Further , as shown in FIGS. 2 (a) to 2 (c),
By arranging lamps of the same color so that they are not next to each other,
Therefore, it is possible to easily mix lamps of different colors.
And the lamps of the same color at both ends of the toning control range.
The lamp wall temperature rise due to thermal interference is also suppressed, so the lamp
The decrease of the output light flux of is reduced.

[0011]

[Table 1]

[0012]

FIG. 4 is a diagram showing an example of a control pattern.
In this example, a single or a plurality of toning control patterns having a substantially constant light flux are provided on the higher output side than the normal toning control pattern having a substantially constant light flux. FIG. 5 is a diagram showing another example of the control pattern. In this example, a single or a plurality of toning control patterns having a substantially constant light flux are provided on the lower output side, in addition to the normal toning control pattern having a substantially constant light flux.

FIG. 6 is a diagram showing still another example of the control pattern. In this example, a single or a plurality of dimming control points are provided on the output side lower than that in addition to the normal toning control pattern with a substantially constant light flux. Black circles in the figure indicate dimming control points. FIG. 7 is a diagram showing another example of the control pattern. In this example, a single or a plurality of dimming control points are provided on the higher output side than the normal toning control pattern with a substantially constant light flux. Black circles in the figure indicate dimming control points.

8 to 10 show the appearance of the lighting device of the present invention. In FIG. 8 , the instrument 4 is open on the bottom,
In FIG. 9 , by setting the lower surface of the device 4 to the louver 5,
The lamp light directly reaches the illuminated surface without passing through the diffusion panel. Further, if the lower surface is opened or the lower surface louver is used, the lamp temperature in the fixture 4 is lowered, and the luminous efficiency of the lamp is improved. This provides higher illuminance. Further, in FIG. 10 , a DUV correction panel 6 is added to the device 4 so that a more natural color appears.

[0015] Here, the black body locus on the high color temperature lamp lamp 3H in the chromaticity diagram, if the lamp 3L was toning as low lamp color temperature, as shown in FIG. 11, toning In the CIE1931xy chromaticity diagram, the range is a line that connects the color temperature of the lamp 3H and the points H and L of the color temperature of the lamp 3L with a straight line. In the figure, H is the color temperature of the lamp 3H, L is the color temperature of the lamp 3L, R is red, G is green, and B is blue. And this line H
Since the color adjustment can be performed only on −L, it is on the − side of the locus of the black body, and the mixed color surface has a slightly reddish color, which may cause a feeling of strangeness. Therefore, by adding a DUV correction panel, the dimmable range is made as close as possible to the black body locus. As a result, it is possible to perform color matching with a more natural white color.

As shown in FIG. 10 , the DUV is attached to the lower surface of the device.
By attaching the correction panel (diffusion panel with a spectral distribution as to shift to the G component side of the chromaticity diagram), it is possible to shift the range that can dimming as shown in FIG. 12 G side, chromaticity diagram The deviation from the blackbody locus of can be minimized. The DUV correction panel can be attached at a position only on the lamp 3H side or only the lamp 3L side by adjusting the spectral distribution of the correction panel.

Regarding the spectral distribution of the DUV correction panel, first, the function obtained by adding the spectral distributions of the lamps used is R (λ), and the spectral distribution of the DUV correction panel is T.
(Λ), the spectral distribution function S (λ) of the lamp light after passing through the correction panel is expressed by S (λ) = R (λ) × T (λ). To plot the lamp light after passing through the correction panel having this spectral distribution in the chromaticity diagram, first, S
The tristimulus values (X, Y, Z) are obtained from (λ).

[0018]

[Equation 1]

Here, K is a constant (6
83 lm / W), x (λ), y (λ), and z (λ) represent color matching functions. Based on these tristimulus values, the x and y coordinate values of the chromaticity diagram are obtained by the following equation. x = X / (X + Y + Z) x = Y / (X + Y + Z) When plotted on a chromaticity diagram based on these x and y values, G
It is only necessary to design a DUV correction panel that shifts to the component side.

As described above, when the fluorescent lamps having different color temperatures are used, the number of control signals is small as compared with the case of mixing colors using a general color lamp (R, G, B lamps, etc.),
Also, the combination of dimming ratios can be easily determined. However, the change range of the color temperature is within the lamp of the color temperature used for toning, and the change range is narrower than the configuration of the R, G, B lamps, and the luminous flux of the fixture near the color temperatures at both ends is the smallest. When using one lamp at a time, the light flux becomes a light flux for one lamp even though the fixture is for two lights, which is inefficient. If an attempt is made to increase the luminous flux of the color temperature in the vicinity of this, it is necessary to increase the number of the luminous fluxes, and the device becomes large.

Therefore, in the invention of claim 8, as the fluorescent lamp, not the conventional general type lamp but the high frequency lighting dedicated type fluorescent lamp is used. It is known that the efficiency of a fluorescent lamp increases as the lighting frequency thereof increases. In other words, the lighting frequency is from 50 / 60Hz to several tens of KH
When it is increased to z, the efficiency is improved by about 20%. Taking advantage of this characteristic, a lamp designed to have the highest efficiency in high frequency lighting of several tens of KHz is a high frequency lighting dedicated fluorescent lamp. Specifically, in the case of the 1200 mm type, the lamp tube diameter was reduced from 32 mm to 25 mm, the enclosed gas pressure was optimized, and the ultraviolet radiation efficiency was improved. This gives Table 2
As described above, the luminous flux is large with a small lamp current, and the luminous flux is about 1.4 times that of the conventional lamp.

[0022]

[Table 2]

FIG . 13 shows an example of a lighting device for four lights. In the figure, 1 is a color temperature variable control unit, 2L and 2H are dimming stabilizers, 3L and 3H are high-frequency dedicated fluorescent lamps having different color temperatures, and 3L is a low color temperature (for example, 3000K), 3H.
Is a high color temperature (eg 6700K). Reference numeral 4 is a lighting fixture. In the conventional general type lamp, at the color temperature at both ends of the control range, only half the number of light flux can be obtained, and the total lm / number is small. However, by using the high frequency lighting dedicated fluorescent lamp, It is possible to solve the shortage of.

[0024] In the case of a high frequency dedicated fluorescent lamp, if the tube diameter is thin
The feature is that when controlling multiple lights, if the lamp interval is wide,
Temperature of the lamp tube wall due to heat from the adjacent lamp
It has the advantage that the rate of decrease in luminous flux due to rising can be reduced.
It In other words, the difference in efficiency including the fixture is compared with the lamp alone.
It will be bigger than you do. The operation is from the color temperature variable control unit 1.
Dimming level signal to each lamp corresponding to the set color temperature
No. is output to ballasts 2L and 2H, and lamps 3L and 3H
It is dimmed and lights up.

With respect to the shape of the fixture, since the lamps having different color temperatures are combined, it is not necessary to diffuse the light to mix the colors as in the combination of the color lamps, and the diffusion panel as in the case of the color lamp is unnecessary. Therefore, the open bottom type does not give a feeling of strangeness. By opening the lower surface, the high efficiency of the high frequency dedicated fluorescent lamp can be further utilized, and the efficiency of the total fixture can be increased.

[0026]

According to the invention of claims 1 to 5, a plurality of control patterns are provided which can be selected according to the space in which the lighting effect is produced, and the luminous flux is kept substantially constant in the plurality of control patterns. However, since it is provided with one or more control patterns for controlling the color temperature of the output light, in addition to the normal toning control pattern for controlling the lamp output of the lighting fixture to be substantially constant,
It becomes possible to select a toning control pattern with higher or lower output and a substantially constant output according to the space in which the lighting is produced, and various control patterns can be selected in various lighting spaces, so that there is no discomfort. It has the effect of creating a comfortable atmosphere. Also, especially the claims
According to the first aspect of the invention, the lamps of the same color should not be adjacent to each other.
By arranging them, you can easily mix different color lamps.
It is possible to adjust the color tones at both ends of the toning control range.
The rise of the tube wall temperature due to the thermal interference of the same-color lamp tube is also suppressed.
Therefore, the decrease in the luminous flux of the lamp is reduced.
effective.

According to the sixth aspect of the invention, by opening the lower surface of the device or by forming the lower surface louver, the lamp temperature in the device is lowered, and the luminous efficiency of the lamp is improved.

According to the invention of claim 7 , even when a plurality of lamps having different color temperatures are used for the color adjustment, the range of the color temperature that can be adjusted is closer to the black body locus, so that the light passes through the correction panel. The effect is that the lamp light after that can be adjusted to a more natural white color.

According to the invention of claim 8 , since the high frequency exclusive fluorescent lamp is used, more luminous flux can be obtained with a smaller number of lamps, and the number of lamps for obtaining a desired luminous flux is smaller than in the conventional case. The advantage is that

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing a basic configuration of a lighting device of the present invention.

FIG. 2 shows an arrangement example of lamps in the lighting device of the present invention.
FIG.

FIG. 3 is an explanatory diagram showing a basic control pattern of the lighting device of the present invention.

FIG. 4 is an explanatory diagram showing a configuration of claim 2.

FIG. 5 is an explanatory diagram showing a configuration of claim 3;

FIG. 6 is an explanatory diagram showing a configuration of claim 4.

FIG. 7 is an explanatory diagram showing the structure of claim 5;

FIG. 8 is a perspective view showing a first embodiment of the invention of claim 6;

FIG. 9 is a perspective view showing a second embodiment of the invention of claim 6;

FIG. 10 is a perspective view showing an embodiment of the invention of claim 7;

FIG. 11 is an explanatory diagram showing an operation before using the correction panel according to the invention of claim 7;

FIG. 12 is an explanatory diagram showing an operation after using the correction panel according to the invention of claim 7;

FIG. 13 is a block diagram showing an embodiment of the invention of claim 8 ;

FIG. 14 is a block diagram of a conventional lighting device.

FIG. 15 is an operation explanatory diagram of a conventional lighting device.

[Explanation of symbols]

3H Lamp with high color temperature 3L Lamp with low color temperature 11 Selection key input section 12 arithmetic unit 13 Data table 14 Light control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 5-29083 (JP, A) Japanese Patent Laid-Open No. 1-251503 (JP, A) Actual Development Japanese Laid-Open No. 5-25698 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) H05B 37/02

Claims (8)

(57) [Claims] 1. A plurality of lamps having different color temperatures, a dimming unit for adjusting the brightness of each lamp having the same color temperature, and a light output of a different color temperature by adjusting the dimming ratio of each lamp. In the lighting device having a control means for obtaining the same, a plurality of lamps of two kinds of colors are provided, and a lamp of the same color is provided.
Lamps are arranged so that they are not adjacent to each other, and a plurality of control patterns that can be selected according to the space in which the lighting is produced are provided, and the color of the output light is maintained in the plurality of control patterns while keeping the luminous flux substantially constant. 1 control pattern to control temperature
A lighting device comprising one or more. 2. A single or a plurality of color-tuning control patterns of a substantially constant light flux are provided on a higher output side than the normal color-matching control pattern of a substantially constant light flux. Lighting equipment. 3. A single or a plurality of color-tuning control patterns of a substantially constant light flux are provided on the lower output side of the color-matching control pattern of a substantially constant light flux, in addition to a normal color-matching control pattern of a substantially constant light flux. Lighting equipment. 4. The illuminating device according to claim 1, wherein a single or a plurality of dimming control points are provided on the lower output side, in addition to the normal color-tuning control pattern of substantially constant light flux. 5. The illuminating device according to claim 1, wherein a single or a plurality of dimming control points are provided on the higher output side than the normal color-tuning control pattern of substantially constant light flux. 6. Is the lower surface of the luminaire open?
The lighting device according to claim 1, further comprising a fixture structure which is covered with a louver and in which the lamp is open to the outside. 7. A lamp having two kinds of colors is provided, and a diffusing panel is provided on the lower surface of the fixture, and the spectral transmittance of green of the diffusing panel is increased to shift the lamp light passing through the panel to the green side of the chromaticity diagram. The lighting device according to claim 1, wherein the lamp light thus mixed is brought close to a black body locus. 8. The lighting device according to claim 1, further comprising a high frequency lighting dedicated lamp having different color temperatures.