JP3951504B2 - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system capable of correcting the initial illuminance corresponding to a space (a store, for example), etc., for varying light modulating levels in accordance with differences of reflectivity of a floor or time (time instant), etc., and of reducing a device in size. SOLUTION: This lighting system is constituted of a plurality of luminaires 4, a light modulation signal output part 3 for outputting the light modulation signal for controlling the light output of the plurality of luminaires 4, and a data correction operating part 2 for correcting the light modulation signal outputted from the light modulation signal output part 3. The data correction operating part 2 operates the data correction according to a luminous flux decreasing characteristic correction light modulation data table 1, a lighting hour timer 6, a clock 5 and a reflectivity correction table 7. A reflectivity selecting switch 8 selects the reflectivity of the space to be used or a radiated surface.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting device, and more particularly to an energy-saving lighting device capable of performing initial illuminance correction.
[0002]
[Prior art]
In recent years, energy saving has attracted attention from the viewpoint of protecting the global environment, and lighting devices that can achieve energy saving without impairing comfort in various applications have been proposed.
[0003]
As a conventional example according to the present invention, there is one disclosed in Japanese Patent Application Laid-Open No. 64-89287, which is based on an illuminance correction value calculation device that calculates an illuminance correction value over time, and an illuminance correction value. By providing a dimming control terminal that corrects and sends out the dimming control signal, an appropriate illuminance can be secured at all times.
[0004]
Here, the illuminance correction value calculation device includes a memory that stores luminous flux reduction characteristics with time for each instrument, a memory that stores luminous flux degradation characteristics due to advancing dirt for each instrument, and an output value of the clock means. And calculating means for calculating an illuminance correction value for maintaining the initial illuminance each time a predetermined number of changes are made, and adding and outputting both correction values. The dimming control terminal is transmitted from the transmission line. Dimming data is input, and the dimming control signal is corrected and transmitted.
[Problems to be solved by the invention]
However, in the above conventional example, the following problems occur.
[0006]
In the above-described conventional example, the light flux reduction characteristics associated with the passage of time and progressing dirt are stored as data for each instrument, but since data is stored in advance for each instrument, it corresponds to various applications and situations. Difficult to support lighting control. That is, it is difficult to deal with a space (for example, a store) where the dimming level is changed according to a difference in reflectance such as a floor surface or time (time), and the required illuminance cannot be obtained. In order to respond to such a request, it is necessary to store necessary data, which leads to an increase in the size of the memory and the size of the apparatus.
[0007]
The present invention has been made in view of the above problems, and its object is to provide a space (for example, a store) in which the dimming level is changed according to a difference in reflectance such as a floor surface or time (time). It is also possible to provide an illuminating device that can correct the initial illuminance and can reduce the size of the device.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, according to the first aspect of the present invention, there is provided an illumination load, a control unit for controlling the light output of the illumination load, and means for selecting a plurality of illuminance correction data. In the apparatus, the illuminance correction data is selected in accordance with the cumulative lighting time of the lighting load and the cumulative dimming amount of the lighting load , and the controller is configured to calculate the cumulative lighting time of the lighting load. In addition, the cumulative illuminance is counted, and the average illuminance is calculated by adding the cumulative lighting time and the cumulative dim amount, and the illuminance correction data is selected based on the calculated value .
[0009]
According to a second aspect of the present invention, in the illuminating device according to the first aspect, the illuminance correction data is selected in accordance with the reflectance of the irradiated surface.
[0011]
According to a third aspect of the present invention, in the illumination device according to the first or second aspect, the illuminance correction data is selected according to the type of the illumination load. Features.
[0012]
According to a fourth aspect of the present invention, in the illumination device according to any one of the first to third aspects, the illuminance correction data is selected in accordance with a type of the luminaire having the illumination load. It is characterized by being.
[0013]
According to a fifth aspect of the present invention, in the illumination device according to any one of the first to fourth aspects, the illuminance correction data is selected in accordance with an external light amount. .
[0015]
[Embodiment]
(Embodiment 1)
FIG. 1 shows a block diagram of the first embodiment according to the present invention.
[0016]
This configuration includes a plurality of lighting fixtures 4, a dimming signal output unit 3 that outputs a dimming signal for controlling the light output of the plurality of lighting fixtures 4, and a dimming output from the dimming signal output unit 3. The data correction calculation unit 2 corrects the signal, and the data correction calculation unit 2 responds to signals from the light flux reduction characteristic correction dimming data table 1, the lighting time timer 6, the clock 5, and the reflectance correction table 7. The data correction is calculated. Reference numeral 8 denotes a reflectance selection SW for selecting the reflectance of the space to be used or the surface to be illuminated.
[0017]
Here, as shown in FIG. 2 (a), a light flux reduction characteristic correction data table 1 for correcting a light flux reduction characteristic (light flux degradation) over time of a light source (for example, a low pressure discharge lamp) is stored. . Further, as shown in FIG. 2B, a reflectance correction table 7 (A, B, C in FIG. 2B) corresponding to the reflectance is stored. In FIG. 2B, B is selected when the reflectance is low, and the selection is changed from A → B → C as the reflectance increases.
[0018]
The operation will be briefly described below.
The user appropriately selects the reflectance of the space to be used or the surface to be illuminated by the reflectance selection SW8. Since the illuminance is low when the reflectance is low, the reflectance correction table 7 is set higher than the standard from the initial time point, as in the dimming data table shown in B of FIG. Selected. Since the illuminance is low when the reflectance is high, the reflectance correction table 7 that is set lower than the standard from the initial time point is provided as in the dimming data table shown in C of FIG. Selected. In accordance with signals from the reflectance correction table 7 selected in this way, the above-described light flux reduction characteristic correction data table 1, the lighting time timer 6, and the clock 5, the data correction calculation unit 2 performs the current time point. The optimal dimming data is calculated and sent to the dimming signal output unit 3, and the luminaire 4 is dimmed. Thereafter, the optimum dimming data changes according to the output value of the lighting time timer 6, the dimming level of the lighting fixture 4 changes, and appropriate illuminance is always obtained.
[0019]
By configuring as described above, when correcting a deviation in design illuminance due to a difference in reflectivity such as the actual irradiated surface with respect to a standard luminous flux reduction characteristic correction table, or when changing the illuminance setting level, It is possible to design easily and freely by switching the reflectance selection SW. Although the calculation is performed by the data correction calculation unit 2 here, a configuration may be adopted in which a plurality of correction data tables taking into account reflectivity, light flux reduction, and the like are selected by a selection SW or the like. Further, the number of lighting fixtures 4 is not limited. Moreover, the lighting fixtures 4 may be connected in series with each other, connected in parallel, or connected in series and parallel.
[0020]
(Embodiment 2)
FIG. 3 shows a block diagram of the second embodiment according to the present invention.
[0021]
The difference from the first embodiment shown in FIG. 1 is that a dimming ratio setting unit 10, a time dimming table 9 set by the dimming ratio setting unit 10, and a cumulative dimming time counting unit 11 are provided. For example, it is configured to perform appropriate illuminance correction when the dimming is performed with a time dimming table as shown in FIG. 5, and the same components as those in the first embodiment are denoted by the same reference numerals. The description is omitted by attaching.
[0022]
Here, a time dimming table as shown in FIG. 5 (the illuminance ratio is 50% from 8:00 am to 6:00 pm, the illuminance ratio is 70% from 6:00 pm to 9:00 pm, and is extinguished from 9:00 pm to 8:00 am). Remember. Further, as shown in FIG. 4A, a light flux reduction characteristic correction data table 1 for correcting a light flux reduction characteristic (light flux degradation) with the passage of time of a light source (for example, a low pressure discharge lamp) is stored. FIG. 4B shows a change in dimming data during dimming at each dimming ratio (for example, 100%, 70%, 50%), and FIG. 4C shows a dimming signal output unit. The output from 3 is shown.
[0023]
The operation will be briefly described below.
After the lighting is started, the cumulative dimming time counting unit 11 counts the cumulative lighting time of the light source and the cumulative dimming amount. For example, assuming that the total lighting time is 1000 hours, the illumination ratio 50% is 750 hours, and the illumination ratio 70% is 250 hours, the average illumination ratio = (0.5 × 750 + 0.7 × 250) / 1000 = 55 (%). Therefore, it is determined that the light is lit at an illuminance ratio of 55% with respect to the total lighting time. Then, a dimming ratio data table obtained from the light flux reduction characteristic at 55% dimming is read out, and the optimum dimming data at that time is calculated by the data correction calculation unit 2 and sent to the dimming signal output unit 3. Then, the lighting fixture 4 is dimmed. For example, the dimming ratio data table at 55% dimming is read, and for example, the illuminance ratio is 50% from 8 o'clock to PM 6 o'clock and the illuminance ratio from 6 o'clock to PM 9 o'clock is set to the data of 73% The ratio is corrected by multiplying by 70%).
[0024]
By configuring as described above, correction corresponding to time schedule control can be performed, and the output of the dimming signal output unit 3 can be changed at certain time intervals as shown in FIG. Energy saving can be achieved and the lamp replacement life can be extended. (In general, when the light is adjusted, the lamp tube wall temperature is lowered. Therefore, it is known that if the preheating conditions are set appropriately, the lamp life will be extended when the light is adjusted.) However, the time interval may be arbitrarily set, such as every 100 hours or every 200 hours.
[0025]
(Embodiment 3)
FIG. 6 shows a block diagram of the third embodiment according to the present invention.
[0026]
The difference from the first embodiment shown in FIG. 1 is that a device type selection SW 13 and a device type correction table 12 selected by the device type selection SW 13 are provided to reduce the luminous flux with respect to time as a device. Therefore, it is configured to perform appropriate illuminance correction according to the type of equipment (for example, classified into Fuji type equipment, embedded type equipment, holder equipment, etc.), and the other first embodiment The same components as those in FIG.
[0027]
In accordance with the signals from the appliance type correction table 12 selected in this way, the light flux reduction characteristic correction data table 1 described above, the lighting time timer 6 and the clock 5, the optimum light adjustment is performed by the data correction calculation unit 2. Data is calculated and sent to the dimming signal output unit 3, and the lighting fixture 4 is dimmed. Thereafter, the optimum dimming data changes depending on the output value of the lighting time timer 6, and the dimming level of the lighting fixture 4 changes. Thereafter, the optimum dimming data changes according to the output value of the lighting time timer 6, the dimming level of the lighting fixture 4 changes, and appropriate illuminance is always obtained.
[0028]
Note that the appliance type selection SW 13 may select not only the appliance type but also the type of the light source, or may select the combination of the appliance type and the type of the light source. Further, different lighting fixtures 4 may be controlled in a plurality of zones, and in this case, a plurality of types of fixture type selection SW 13 may be used. )
(Embodiment 4) FIG. 7 shows a block diagram of a fourth embodiment according to the present invention.
[0029]
1 differs from the first embodiment shown in FIG. 1 in that area dimming A selection SW17, area dimming B selection SW18, area dimming C selection SW19, and area dimming A selection SW17 to area dimming. By providing the area A correction table 14, the area B correction table 15, and the area C correction table 16 selected by each selection of the C selection SW 19, and configured to perform appropriate illuminance correction for each control area. Yes, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0030]
A brief description is given below.
Area A is a place where outside light is always incident by the window, Area C is a place where the use of light is low but is necessary for people such as a corridor, and Area B is a place between Area A and Area C. The illumination ratio of A is 50%, the illumination ratio of area B is 100%, and the illumination ratio of area C is 30%. Then, the data correction calculation unit 2 is optimal in accordance with signals from the area A correction table 14 to the area C correction table 16, the above-described light flux reduction characteristic correction data table 1, the lighting time timer 6, and the clock 5. Dimming data is calculated. As shown in FIG. 8, in area A, at the initial stage (0 h), a standard dimming ratio (in this case, 70%) = 35% set in advance from an illumination ratio of 50% × light flux reduction curve is set to 35%, and 5000 hours have elapsed. Later, 50% × 85% = 42.5%, and after 10,000 hours, 50% × 100% = 50%. Thereafter, the same calculation is performed for each area. Then, the calculated data is sent to the dimming signal output unit 3, and the lighting fixture 4 is dimmed. Thereafter, the optimum dimming data changes according to the output value of the lighting time timer 6, the dimming level of the lighting fixture 4 changes, and appropriate illuminance is always obtained.
[0031]
(Embodiment 5) FIG. 9 shows a block diagram of a fifth embodiment according to the present invention.
[0032]
First Embodiment differs from that shown in Figure 1, provided with an external light sensor 21 for detecting the external light, and a sensor information correction table 20 which is selected in accordance with the detection value of the external light sensor 21 The configuration is such that the appropriate illuminance correction is performed according to the external light, and the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.
[0033]
A brief description is given below. Assuming that area A is always a place where outside light enters by the window, area B is a place slightly away from the window, and area B is a place far away from the window, the area C is a place far away from the window. sensor information correction table 20 is selected, for example, when external light is large, the area A is 30%, the area B is 50%, the area C 70% is is selected. Then, the sensor information correction table 20, a brightness decrease characteristic correction data table 1 above, the lighting time timer 6, according to a signal from the 5 which clock, the optimum dimming data by the data correction operation unit 2 calculation Is done. Here, the calculation method shown in FIG. 8 may be used, or other means may be used. Then, the calculated data is sent to the dimming signal output unit 3, and the lighting fixture 4 is dimmed. Thereafter, the optimum dimming data changes according to the output value of the lighting time timer 6, the dimming level of the lighting fixture 4 changes, and appropriate illuminance is always obtained.
[0034]
In addition, as long as the above-mentioned embodiments satisfy the operational effects of the present invention, they may be combined as appropriate. The dimming signal may be a PWM signal, a DC signal, or another signal. The dimming signal may be a digital transmission signal. In this case, a transmission terminal may be installed on the lighting fixture 4 side. The light source may be a straight tube low pressure discharge lamp, an annular low pressure discharge lamp, or a high pressure discharge lamp such as an HID lamp.
[0035]
【The invention's effect】
According to the first to fifth aspects of the invention, the initial illuminance corresponding to a space (for example, a store) in which the dimming level is changed according to a difference in reflectance such as a floor surface or time (time). It is possible to provide an illumination device that can be corrected and can be downsized.
[Brief description of the drawings]
FIG. 1 is a block diagram of a first embodiment according to the present invention.
FIGS. 2A and 2B show (a) luminous flux reduction characteristics and (b) a dimming data table according to the first embodiment of the present invention.
FIG. 3 is a block diagram of a second embodiment according to the present invention.
FIGS. 4A and 4B show (a) luminous flux reduction characteristics, (b) dimming data table, and (c) data correction calculation unit output according to the second embodiment of the present invention.
FIG. 5 shows an example of time schedule control according to the second embodiment of the present invention.
FIG. 6 is a block diagram showing a third embodiment according to the present invention.
FIG. 7 is a block diagram of a fourth embodiment according to the present invention.
FIG. 8 shows an example of a calculation method according to the fourth embodiment of the present invention.
FIG. 9 is a block diagram of a fifth embodiment according to the present invention.
[Explanation of symbols]
4 lighting equipment

Claims (5)

An illumination device comprising: an illumination load; a control unit that controls the light output of the illumination load; and a means for selecting a plurality of illuminance correction data. The illuminance correction data is a cumulative lighting time of the illumination load. And the control unit counts the cumulative lighting time and cumulative dimming amount of the lighting load, and the respective cumulative lighting time and cumulative dimming amount. An illuminating device characterized in that the average illuminance is calculated by adding the sum of the illuminance and the illuminance correction data is selected based on the calculated value .   The illumination device according to claim 1, wherein the illuminance correction data is selected according to the reflectance of the irradiated surface. The illumination apparatus according to claim 1, wherein the illuminance correction data is selected according to a type of the illumination load. The illumination device according to any one of claims 1 to 3, wherein the illuminance correction data is selected according to a type of a lighting fixture having the illumination load. The illumination device according to any one of claims 1 to 4, wherein the illuminance correction data is selected according to an external light amount.

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