JPH071599U - Variable color lighting device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a variable color lighting device that mixes the emission colors of a plurality of light sources with different emission colors to change the light color of the illumination light, Reduce color temperature deviation. [Structure] A plurality of light sources 5R, 5G, 5B having different emission colors
And a lighting control unit 4 for adjusting the amount of light emitted from each of the light sources.
Variable color illumination including a luminaire 6 including R, 4G, and 4B, and a color temperature setting operation unit 1 that provides the luminaire 6 with a color temperature control signal for setting a color temperature of mixed color light. In the apparatus, a color temperature adjusting unit 3 for manually correcting a color temperature control signal given from the color temperature setting operation unit 1 to the lighting fixture 6 is provided in the lighting fixture 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a variable color lighting device that mixes the emission colors of a plurality of light sources having different emission colors to change the light color of the illumination light.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, there is known a variable color lighting device that mixes a plurality of emitted colors to change the light color of illumination light (Japanese Patent Laid-Open No. 4-48584). This allows the colors and color temperatures of the mixed illumination light to be set freely by setting the light intensity of multiple light sources of different emission colors using the operating unit. However, in such a conventional example, due to variations in the light output of each light source, characteristic changes over time, and variations in the output characteristics of the lighting control unit for driving each light source, the light color of the set illumination light is set. It is possible that there is a deviation from the color temperature, and especially when a large number of these devices are installed, the color of the mixed light from each device looks different.

In order to improve such a defect, preset light amount data of each light source corresponding to the light color of mixed color light is stored in advance, and the detected light amount detected by the light output of each light source is compared with the set light amount. However, it has been proposed to correct the light quantity of each light source according to the comparison result (Japanese Patent Application No. 4-134666). As a result, the color of the mixed color light is individually corrected for each device, and variations in the light color and color temperature of the mixed color light between the devices are reduced. However, in this conventional example, there is a problem that a sensor for detecting the light output of each light source is required for each light source, resulting in a large configuration. In addition, there is a possibility that variations in the detection output may occur due to differences in the characteristics of the sensors themselves, performance degradation, and variations in position, and as a result, variations in color may occur among multiple lighting fixtures.

[0004]

The present invention has been made in view of the above points, and an object of the present invention is to mix the emission colors of a plurality of light sources having different emission colors to generate illumination light. In a variable color lighting device in which the light color is variable, it is necessary to reduce the deviation of the light color and color temperature of the mixed color light between a plurality of fixtures.

[0005]

[Means for Solving the Problems]

 In the present invention, in order to solve the above-mentioned problems, as shown in FIG. 1, a plurality of light sources 5R, 5G, 5B having different emission colors and a lamp for adjusting the light emission amount of each light source are provided. Variable consisting of a lighting fixture 6 including control units 4R, 4G, 4B, and a color temperature setting operation unit 1 for giving a color temperature control signal for setting the color temperature of mixed color light to the lighting fixture 6. In the color lighting device, a color temperature adjusting unit 3 for manually correcting a color temperature control signal given from the color temperature setting operation unit 1 to the lighting device 6 is provided in the lighting device 6. is there.

[0006]

[Action]

 According to the present invention, it is possible to improve the color variation with a simple configuration without a sensor by providing a manual color temperature adjusting section in the device, and since the person adjusts the color temperature, Since the color discrimination of the eyes is very excellent, it is possible to almost eliminate the color variation.

[0007]

【Example】

 FIG. 1 is a block circuit diagram of a first embodiment of the present invention. In the figure, reference numeral 1 denotes a color temperature setting operation unit, which is an operation unit capable of setting a desired color temperature and illuminance level. A color temperature control signal generator 2 receives the output of the color temperature setting operation unit 1 and generates a corresponding color temperature control signal. Reference numeral 3 denotes a color temperature adjustment unit, which is an adjustment unit for correcting the color temperature control signal given from the color temperature control signal generation unit 2 and manually adjusting the dimming ratio of each lamp. 4R, 4G, and 4B are lighting control units, and are dimming lighting devices or dimmers. Reference numerals 5R, 5G, and 5B are a plurality of light sources having different emission colors, and are composed of, for example, RGB color lamps, lamps having different color temperatures, and the like. Reference numeral 6 denotes an illumination device, which includes a color temperature adjusting unit 3, lighting control units 4R, 4G, 4B and a plurality of light sources 5R, 5G, 5B.

FIG. 2 shows a color temperature control signal output from the color temperature control signal generator 2 to each lighting control unit 4R, 4G, 4B. By changing the duty, each lighting control unit 4R, 4G, The output of 4B is increased or decreased. The color temperature control signal is individually given corresponding to each lighting control section 4R, 4G, 4B, such as R signal, G signal, and B signal. When the duty is small as shown in FIG. 2 (a), the output of the corresponding lighting control unit is large, and as shown in FIG. 2 (b), the output of the corresponding lighting control unit is large. Get smaller.

The operation of this embodiment will be specifically described below. Now, when the color temperature is set by the color temperature setting operation unit 1, the color temperature control signal from the color temperature control signal generation unit 2 is used as a dimming signal for each lighting control unit 4R, 4G, 4B. Is output. Next, it is sent to the lighting control units 4R, 4G, 4B via the color temperature adjusting unit 3 shown in FIG. 3, and the plurality of lamps 5R, 5G, 5B having different emission colors are turned on to obtain a desired color temperature. Now, when there are many lighting fixtures 6, due to the characteristic difference of the lamps 5R, 5G, 5B, etc., when only one lighting fixture 6 is higher in color temperature than the other lighting fixtures 6, the color temperature shown in FIG. It is corrected by the adjusting unit 3.

The color temperature adjusting unit 3 in FIG. 3 includes a CR time constant circuit that delays the rising and falling of each of the R, G, and B input signals, and a comparator IC that shapes the waveform of the delayed signal.₁ It consists of and. CR time constant circuit has variable resistance VR₁ And capacitor C₁ The variable resistor VR₁ The sliding terminal of is a diode D₁ It is connected to the input terminal via. Therefore, when the signal at point A in FIG. 3 rises as shown in FIG. 4 (A), the signal at point B in FIG. 3 rises with a delay as shown in FIG. VR₁ And capacitor C₁ Is determined by the time constant of. Further, when the signal at point A in FIG. 3 falls as shown in FIG. 4 (A), the signal at point B in FIG. 3 falls with a delay as shown in FIG. 4 (B), and the delay of its fall is delayed. Is the variable resistance VR₁ It changes as shown by the solid line, the alternate long and short dash line, and the broken line in FIG. Solid line is variable resistance VR₁ Is the position of point a in FIG. 3, the one-dot chain line indicates the variable resistance VR.₁ Is the position of point b in FIG. 3, the broken line indicates the variable resistance VR.₁ Shows the trailing edge of the signal at point B at the position of point c in FIG. In FIG. 4B, Vth is a comparator IC₁ Is a threshold level of, and the signal at the point C in FIG. 3 changes as shown in FIG. 4 (C) with this level as a boundary. For example, variable resistor VR₁ Is changed from the point a to the position c, the duty of the R signal becomes small and the output of the lamp 5R (for example, a red lamp) corresponding to the R signal increases. Therefore, the red component increases and the color temperature decreases. In this way, the variable resistance VR ₁ The duty of the R signal can be corrected according to the position of the sliding terminal of. Here, for the R signal, the variable resistance VR₁ It was explained that the duty can be corrected by using the variable resistor VR for the G signal and the B signal.₂ , VR₃ It is clear that each can correct the duty by. The duty correction may be performed not only for one signal but also for a plurality of signals at the same time. Then, by controlling the lighting control units 4R, 4G, and 4B by the corrected R ′ signal, G ′ signal, and B ′ signal, it is possible to arbitrarily correct the variation of the mixed color light for each lighting fixture 6. You can

FIG. 5 is a circuit diagram of the color temperature adjusting unit 3 used in the second embodiment of the present invention. In the figure, I C_Four Is a timer circuit, which is composed of a general-purpose integrated circuit (for example, NE555 manufactured by Signetics), and has a trigger terminal (2nd pin), a threshold terminal (6th pin), and a discharge terminal (7th pin). Resistor R connected to₁ , R₂ And capacitor C_Four A rectangular wave signal with a frequency determined by the time constant of is oscillated from the output terminal (Pin 3). As a result, the resistance R₃ , R_Four Potential V at the connection point₃ Changes as shown in FIG. 6 (b). Resistance R₃ , R_Four Potential V at the connection point₃ Goes low, transistor Q₁ Turns off and the resistance R_Five Through transistor Q₂ Base current flows to the transistor Q₂ Turns on. Therefore, the capacitor C₆ Voltage Vc₆ Is zero. Resistance R₃ , R_Four Potential V at the connection point₃ Becomes high level, the transistor Q₁ ON, transistor Q₂ Turns off, and capacitor C₆ Is charged through the variable resistor VR and the capacitor C₆ Voltage Vc₆ Rises with a predetermined time constant as shown in FIG. 6 (c). This voltage Vc₆ Is the operational amplifier IC _Five Buffer amplifier and resistor R_TenVia comparator IC₆ Is input to the positive terminal of.

On the other hand, the variable-duty dimming signal Vi input to the color temperature adjusting unit 3 is converted into the DC voltage level of the capacitor C ₇ , and is input to the minus side terminal of the comparator IC ₆ via the resistor R _11. It has been entered. When the dimming signal Vi 1 input to the color temperature adjusting unit 3 is at the Low level, the transistor Q ₃ is off and the capacitor C ₇ is charged via the resistors R ₇ and R ₈ . Further, when the dimming signal Vi inputted to the color temperature adjusting unit 3 becomes High level, the base current to the transistor Q ₃ through a resistor R ₆ to flow, next to the transistor Q ₃ is ON, the resistor R ₉ through Capacitor C ₇ is discharged. As a result, the DC voltage Vc ₇ whose level changes according to the duty of the dimming signal Vi input to the color temperature adjusting unit 3 is obtained at the capacitor C ₇ . By comparing the voltage Vc ₆ of the voltage Vc ₇ and above the capacitor C ₆ of the capacitor C _7, the rectangular wave signal Vo as shown in FIG. 6 (d) to the output of the comparator IC ₆ is obtained. The slope of the charging curve of the voltage Vc ₆ of the capacitor C ₆ changes depending on the variable resistance VR. For example, if it is decreased from a certain value, the charging is accelerated and the waveform changes from the state shown by the solid line to the state shown by the alternate long and short dash line. If the value is increased from a certain value, charging becomes slower and the waveform changes from the state shown by the solid line to the state shown by the dotted line. Therefore, the duty of the output signal changes. Other operations are the same as those in the first embodiment.

FIG. 7 is a block circuit diagram of a third embodiment of the present invention. In this embodiment, a signal data conversion unit 7 and a data correction operation unit 8 are provided between the color temperature setting operation unit 1 and the color temperature control signal generation unit 2. The color temperature setting operation unit 1 is an operation unit that sets information such as a color temperature of 3000 K and a brightness of 100% and transmits the information by a transmission signal. The signal data conversion unit 7 converts the transmission signal into color temperature data using a ROM table or the like. The data correction operation unit 8 is, for example, an operation unit for correcting color temperature, deviation from a black body locus, and the like. The color temperature control signal generator 2 converts the color temperature data from the signal data converter 7 into a dimming signal. 4R, 4G, and 4B are lighting control units, and are dimming lighting devices or dimmers. Reference numerals 5R, 5G, and 5B are a plurality of light sources having different emission colors, and are composed of, for example, RGB color lamps, lamps having different color temperatures, and the like. Reference numeral 6 denotes a lighting fixture, which includes all the above-mentioned components except the color temperature setting operation unit 1.

In this embodiment, unlike the first or second embodiment, the dimming signal itself is not corrected, but a transmission signal is sent between the color temperature setting operation unit 1 and the lighting fixture 6. Since the color temperature control signal generation unit 2 is provided inside the lighting fixture 6, the transmission signal from the color temperature setting operation unit 1 is converted into an address for reading the ROM, and the address corresponding to the address is read. The color temperature data is read from the ROM table of the signal data conversion unit 7, and the read data is corrected by the data correction operation unit 8. As a specific example, the signal data conversion unit 7 has a ROM that stores a table in which the address and color temperature data correspond to each other as shown in Table 1, and by the transmission signal from the color temperature setting operation unit 1, The dimming data of the corresponding address is read. In Table 1, the dimming data of the R lamp is stored, but the dimming data of the address corresponding to the transmission signal is similarly read for the other G lamps and B lamps.

[0015]

[Table 1]

Next, when correcting the color temperature, the data correction operation unit 8 as shown in FIG. 8 is operated. When the + x button on the right side is pressed, the data correction operation unit 8 outputs a signal for correcting the current color temperature by +0.002 on the x axis in chromaticity coordinates. By this signal, the signal data conversion unit 7 moves the address from 0000H to 1000H, and the dimming data of the R lamp is shifted by +0.002 from the current color temperature to the x axis. Is changed and output. The same applies to the G lamp and B lamp. In this way, it becomes possible to correct the color temperature by a predetermined amount in the plus or minus direction with respect to the x and y coordinates. Regarding the specific configuration of the data correction operation unit 8, for example, a means for setting the upper several bits of the address for accessing the ROM of the signal data conversion unit 7 may be used.

The type of light source may be any of a fluorescent lamp, a high-pressure discharge lamp, an incandescent lamp, and the load power and shape are not limited. The light color of each lamp may be not only the color temperature but also the difference in color, and not only the RGB lamp but also the light bulb color or white of the lamp may be used. Regarding the RGB light colors, for example, a white light-emitting lamp equipped with a color filter may be used. Further, the number of light sources is not limited to three and may be four or more, and two or more light sources of the same color may be used. Also, in appearance, a plurality of lamps may be integrated as one lamp. Further, the lighting control unit may be integrated as long as it can change the dimming level for each light by a dimming ballast, a dimmer, or the like.

[0018]

[Effect of device]

 According to the present invention, a variable color luminaire including a plurality of light sources having different luminescent colors, and a color temperature setting operation unit for providing a color temperature control signal for setting the color temperature of mixed color light to the luminaire. In the variable color lighting device configured by, the color temperature adjusting unit for manually correcting the color temperature control signal given to the lighting device from the color temperature setting operation unit is provided in the lighting device. Color temperature can be easily corrected without using a large-scale configuration using conventional sensors, and because human eyes adjust the color temperature, the color discrimination of human eyes is extremely excellent. Therefore, there is an effect that it can be corrected extremely accurately. In addition, there is an advantage that color accuracy does not deteriorate due to performance deterioration of parts compared to the conventional configuration using a sensor.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of a first embodiment of the present invention.

FIG. 2 is a waveform diagram of a color temperature control signal used in the first embodiment of the present invention.

FIG. 3 is a circuit diagram of a color temperature adjusting unit used in the first embodiment of the present invention.

FIG. 4 is an operation explanatory diagram of a color temperature adjusting unit used in the first embodiment of the present invention.

FIG. 5 is a circuit diagram of a color temperature adjusting unit used in a second embodiment of the present invention.

FIG. 6 is an operation explanatory view of a color temperature adjusting unit used in the second embodiment of the present invention.

FIG. 7 is a block circuit diagram of a third embodiment of the present invention.

FIG. 8 is a front view of a color temperature setting operation unit used in a third embodiment of the present invention.

[Explanation of symbols]

 1 color temperature setting operation section 2 color temperature control signal generation section 3 color temperature adjustment section 4 lighting control section (4R, 4G, 4B) 5 multiple light sources (5R, 5G, 5B) with different emission colors 6 lighting equipment

Claims (1)

[Scope of utility model registration request] 1. A lighting fixture having a plurality of light sources of different emission colors, a lighting control unit for adjusting the amount of light emitted from each light source, and a color temperature of mixed color light for the lighting fixture. And a color temperature setting operation section for giving a color temperature control signal, the color temperature adjusting section for manually correcting the color temperature control signal applied to the luminaire from the color temperature setting operation section. A variable color lighting device, characterized in that: