JPH04154086A - Color temperature variable illuminating device - Google Patents

Abstract

PURPOSE:To easily obtain illumination light of white color system and to continuously adjust a color temperature by lighting light sources of red and blue color systems dimmed while lighting a light source of white color system. CONSTITUTION:A light source 2W of white color system, light source 2R of red color system and a light source 2B of blue color system are arranged in a single fixture main unit 1, and a lighting control part 3 for respectively dimming the light sources 2R and 2B is provided. The other color from the light sources 2R and 2B is mixed with the light source 2W of white color system. Accordingly, a color temperature can be adjusted by dimming light of the light sources 2R and 2B although while illuminating basically a white color system. In this way, illumination light of white color system can easily be obtained further to make the color temperature continuously adjustable.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a variable temperature lighting device that can adjust the color temperature of mainly white illumination light.

[Conventional technology]

In recent years, in order to improve the living environment, there has been a demand for being able to adjust the color temperature of illumination light depending on time, place, and purpose. To meet these requirements,
As shown in FIG. 7, three types of light sources 2R, 2G, and 2B of red, green, and blue are arranged in the appliance body 1, and the lighting control section 3
It is considered that each light source 2R, 2G, 2B is dimmed and controlled by the following. That is, white illumination light is obtained by mixing the three colors, and the color temperature is adjusted by adjusting the mixing ratio of each color using the operating section 4.

[Problem to be solved by the invention]

According to the above configuration, in order to obtain the desired light color, it is necessary to set the mixing ratio of each color to a predetermined value. Clarifying the data regarding the mixing ratio of each color, lighting fli control part 3
It is necessary to set it to . As a result, there is a problem in that 1118 controls are required to adjust the color temperature. Furthermore, since the light sources 2R, 2G, and 2B of each color have their own deterioration characteristics, as time passes, a discrepancy occurs between the data set in the lighting control unit 3 and the actual light color.
In particular, any one of the three color light sources 2R22G and 2B
If the light cannot be turned on, a problem arises in that white illumination light cannot be obtained. In order to solve this problem, as shown in FIG. 8, in addition to the three color light sources 2R, 2G, and 2B, a white light source 2W may be provided in the instrument body l. That is, when obtaining white illumination light, only the light source 2W is turned on, and when obtaining other light colors, the light sources 2R and 2 are turned on.
G and 2B are lit. However, with this configuration, the color temperature cannot be changed with white illumination light, and if other lights fi2R, 2G, and 2B are also turned on to change the color temperature,
Similar to the conventional configuration shown in FIG. 7, a problem arises in that the control becomes double-current (Japanese Utility Model Publication No. 62-99156). The present invention aims to solve the above-mentioned problems, and enables continuous control of color temperature when obtaining a white illumination color than before, and also enables continuous control of color temperature even when the light source deteriorates. It is an object of the present invention to provide a color temperature variable illumination device that can provide white illumination light.

[Means to solve the problem]

In order to achieve the above object, in the structure of claim 1, a first light source of white color, a second light source of red color, and a third light source of blue color are disposed within one appliance main body, A lighting control section is provided that controls the light of the two light sources and the third light source, respectively. In the configuration of the second aspect, the lighting control section is configured to simultaneously turn on either the second light source or the third light source and the first light source.

[Effect]

According to the configuration of claim 1, the first white light source is turned on, and the second red light source and the third blue light source are dimmed and turned on, so that the first white light source is turned on. for,
Other colors from the second and third light sources are mixed together, and although the color is basically white, the color temperature can be adjusted by dimming the second and third light sources. be. As a result, white illumination light can be easily obtained, and the color temperature can be continuously adjusted. Further, even if the light source deteriorates, as long as the first white light source is lit, white illumination light can be obtained. According to the configuration of claim 2, for the white-based first light source,
Since only one of the red or blue colors is mixed, the color temperature can be lowered depending on the amount of the red color mixed.
The color temperature can be increased by changing the amount of blue color mixed, and the color temperature can be adjusted with simple control.

【Example】

(Example 1) In this example, as shown in FIG. 1, three white-based first light sources 2 W a , 2 W b , and 2 W c are provided, and a red-based second light source 2 R and a blue-based second light source 2 R are provided. One third light source 2B of the system is provided. All light sources 2Wa
, 2 W b , 2 W c , 2 R, and 2B are housed in one instrument body 1, and the instrument body 1 is provided with a diffusion plate or the like so as to obtain a uniform color mixture. Here, the second light source 2R has a trajectory of a monochromatic spectrum, a straight line of x=0.3, and a line of y=0.3 in the UC3 chromaticity diagram.
3, and the third light source 2
B is the locus of a monochromatic spectrum in the UC3 chromaticity diagram,
It is set to have a light color within a range surrounded by a straight line at x=0.45 and a straight line at y=045. Each light source 2 W a , 2 W b used in this example,
2 W c , 2 R, 2B are set as follows in the UC8 chromaticity diagram:
9,0,3523,3450>, red color is (0,577
0,0,3366,2550), blue color (0,154
8,0,0792,1100>. On the chromaticity diagram shown in FIG. 2, these correspond to points W, R, and B, respectively. Each light source 2 W a , 2 W b , 2 W c
, 2R, and 2B are dimmed by the lighting control section 3, and the lighting control section 3 changes the color temperature when the knob 5 of the operation section 4 is operated. The lighting control unit 3 is configured, for example, as shown in FIG. 3, and includes first light sources 2 W a , 2 W b , 2 W
c, a switch S W w that turns on and off the supply of commercial tl[Ac, corresponding to the second light source 2R1 and the third light source 2B, respectively.
, SW r , SW b and lighting circuits 6W, 6
R and 6B are provided. Further, for the second light source 2R and the third light source 2B, a dimmer circuit 7R is installed between the switches S W r and S W b and the lighting circuits 6R and 6B, respectively, so that dimming 1tIIN control is possible. ,7B
will be provided. The operating section 4 is connected to the dimming circuits 7R and 7B.
By operating the knob 5, the amount of dimming of the second light source 2R and the third light source 2B is controlled.
It is. Here, depending on the light source, a lighting circuit of 6W,
It is possible to omit the lighting circuits 6R and 6B, and the lighting circuits 6R and 6B may be integrated with the dimming circuits 7R and 7B. The knob 5 of the operating section 4 is provided so as to be slidable, and when located at the center of the sliding range, the color temperature is set at the intersection of the solid line and the broken line in FIG. 4. At this time, the first light sources 2W a and 2 W b
, 2 W c is lit, and the color temperature is set to 5°00°K. When the knob 5 is slid toward the low temperature side, the light intensity of the red-colored second light source 2R increases as shown by the solid line in FIG. 3922, 0, 3490), and the color temperature is 3000°K, which is close to the color of a light bulb. Furthermore, when the knob 5 is slid toward the high temperature side, the amount of light from the blue third light source 2B increases, as shown by the broken line in FIG. 4, and the color temperature increases.
When the third light source 2B reaches the maximum light intensity (0,2900,0
, 2760), and the color temperature is 10000°K. As a result, by operating the knob 5, the illumination color changes continuously between α-W-β on the chromaticity diagram shown in FIG. In this way, white illumination light can be obtained anywhere within the control range, and the second light source 2R and the third light source 2
Even if B deteriorates and the light output decreases or the light does not turn on, it is possible to provide white illumination. Moreover, as shown in FIG. 4, by operating the knob 5, the second
Only one of the light source 2R and the third light source 2B is lit, and when one is lit, the other is off, so the light intensity of the second light #2R and the third light source 2B is adjusted. There is no need to consider the temperature ratio, and control becomes a matter of course. (Example 2) In this example, as shown in FIG.
Only one W is used, and the second light source 2R and third light source 2B have a maximum light amount of 20% compared to the first light source 2w.
%, so a small light source is used. The other configurations are the same as those in the first embodiment, so their explanation will be omitted. (Embodiment 3) In this embodiment, as shown in FIG. 6, a storage section 8 made of ROM is provided between the operation section 4 and the lighting control section 3. It consists of an address switch that specifies 8 addresses. The storage unit 8 stores data regarding the amount of dimming of the second light source 2R and the third light source 2B, and if the operation unit 4 is set to specify an address corresponding to a desired color temperature, the storage unit According to the data stored in 8, the second light source 2R and the third light source 2B
The light intensity can be set. put it here,
The format of the data stored in the storage unit 8 is the dimmer circuit 7R,
It may be determined according to the format of 7B. Further, the ROM constituting the storage section 8 may be separate or shared between the second light source 2R and the third light source 2B. In each of the above embodiments, each light source 2Wa2Wb2WC, 2
As R and 2B, any type of light source such as a fluorescent lamp or an incandescent lamp may be used.
The light source 2B may emit red or blue light, or may be a white light source combined with a filter or the like. In addition, any type of dimming circuits 7R and 7B can be used, such as one that uses phase control or one that controls the duty ratio by pulse lighting.
The signal sent from the operating section 4 to the lighting control section 3 may be of any type, such as an analog quantity, a digital quantity, or a signal instructing based on a pulse duty ratio. In addition, light sources 2 W a , 2 W b , 2 W
The numbers of c, 2R, and 2B may be set as appropriate depending on the purpose.

【Effect of the invention】

As mentioned above, according to the configuration of 1R requirement 1, the first white color
In addition to turning on the light source, the second light source of red color and the third light source of blue color are dimmed and turned on, so the first light source of white color is turned on.
The light source is mixed with other colors from the second and third light sources, and while the color is basically white, the color temperature can be adjusted by dimming the second and third light sources. It is possible. As a result, white illumination light can be easily obtained, and the color temperature can be continuously adjusted. Another advantage is that even if the light source deteriorates, as long as the first white light source remains lit, white illumination light can be obtained. According to the configuration of claim 2, for the white-based first light source,
Since only one of the red or blue colors is mixed, the color temperature can be lowered depending on the amount of the red color mixed, and the color temperature can be raised depending on the amount of the blue color mixed. This makes it possible to adjust the temperature.

[Brief explanation of the drawing]

Fig. 1 is a program diagram showing Embodiment 1 of the present invention, Fig. 2 is an explanatory diagram of the operation of the same, Fig. 3 is a block diagram of the lighting control section used in the same, and Fig. 4 is an explanatory diagram of the operation of the same. , FIG. 5 is a process diagram showing a second embodiment of the present invention, FIG. 6 is a process diagram showing a third embodiment of the present invention, FIG. 7 is a process diagram showing a conventional example, and FIG. FIG. 8 is a block diagram showing another conventional example. 1... Instrument body, 2 W, 2 W a, 2 W
b, 2Wc - first light source, 2R... second light source, 2B... third light source, 3... lighting control section, 4...
Operation unit, 5...knob. Agent Patent Attorney Ishi 1) Long 71... Apparatus body 2Wa, 2Wb, 2Wc...First light source 2R...Second
Light source 2B...Third light source 3...Lighting control section 1 Fig. 2

Claims (2)

[Claims] (1) A first light source of white color, a second light source of red color, and a third light source of blue color are arranged in one fixture body, and lighting is performed to dim the second and third light sources respectively. A color temperature variable lighting device comprising a control section. (2) The color temperature variable lighting device according to claim 1, wherein the lighting control section turns on one of the second light source and the third light source and the first light source at the same time.