JPH11219792A - Lighting equipment - Google Patents

Abstract

(57) [Problem] To provide an illuminating device capable of suppressing unnecessary lighting and performing optimal lighting. SOLUTION: An illumination load 1, an illuminance sensor 2 for detecting illuminance in the vicinity of the illumination load 1, and a control unit 4 for controlling each unit are provided. The lighting device in which the lighting state of the lighting load 1 is controlled according to the relationship has a first set level for light / dark detection and a second set level for dimming control, and the ambient illuminance detected by the illuminance sensor 2 is When the lighting load 1 falls below the first set level, the lighting load 1 is turned on. After lighting, the lighting state of the lighting load 1 is controlled such that the ambient illuminance becomes the second set level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device capable of controlling a lighting state in accordance with the brightness of the surroundings and the presence or absence of a human body.

[0002]

2. Description of the Related Art Conventionally, as an illumination device of this type, for example, in the case of an outdoor illumination device such as a porch light or a street light, the load is controlled by detecting the brightness of ambient illuminance by an illuminance sensor. I have. That is, if the ambient illuminance is lower than the first set value, the load is turned on, for example, 100%, and if the ambient illuminance is higher than the second set value, the load is turned off. When the load is lit once, even if the ambient illuminance increases, 100% lighting is continued until the load exceeds the second set value. Therefore, in a case where the ambient illuminance is slightly increased, for example, at twilight, the load may be turned off, but 100% lighting is continued until the ambient illuminance exceeds the second set value. I will.

[0003] Also, in the case of an indoor lighting device with a sensor, the load is controlled by detecting the brightness of the surrounding illuminance by an illuminance sensor, similarly to the above-described porch light and street light. However, the change in illuminance indoors is smaller than that in the outdoors, and it also flashes by itself (if the illuminance sensor is operating even after the load is lit, it is judged that the ambient illuminance is high due to the light of the load and the load is turned off. In order to prevent this, the input of the illuminance sensor is stopped after the load is turned on. Therefore, if the load is lit 100% once, even if the surrounding area becomes bright and the ambient illuminance (excluding the illuminance due to the load) increases, the 100% illumination will continue until a certain time elapses.

On the other hand, in the case of an appliance having a self-control function, feedback control for controlling a load output is performed according to the ambient illuminance. Thus, for example, the illuminance on the desk surface is kept constant. But,
In this case, the lighting is always performed even when the surroundings have a brightness that does not require lighting the load.

[0005]

As described above, in the above-described lighting apparatus, the outdoor lighting fixture has the second problem.
Is usually set to a fairly large value (sunlight level in the morning), so that even if it is bright enough, the lighting will continue at 100%.
When lit, even if the surrounding area becomes bright and the ambient illuminance (excluding the illuminance due to the load) increases, 100% lighting is continued until a certain period of time elapses, thus causing unnecessary lighting. There was a problem.

Further, even in the case of an appliance having a self-control function, since the lighting is always performed even when the surroundings have a brightness that does not require the lighting of the load, useless lighting also occurs. There was a problem.

The present invention has been made in view of the above points, and an object of the present invention is to provide a lighting device capable of suppressing unnecessary lighting and performing optimal lighting.

[0008]

According to the first aspect of the present invention,
An illumination load, an illuminance sensor that detects illuminance near the illumination load, and a control unit that controls each unit. The illumination load is turned on according to a relationship between an illuminance value detected by the illuminance sensor and a set level. An illumination device whose state is controlled has a first set level for light / dark detection and a second set level for dimming control, and the ambient illuminance detected by the illuminance sensor is the first.
The lighting load is turned on when the lighting load falls below the set level, and after the lighting, the lighting state of the lighting load is controlled such that the ambient illuminance becomes the second set level.

According to a second aspect of the present invention, in the first aspect of the invention, a third set level is held, and when the ambient illuminance exceeds the third set level, the lighting load is turned off. It is characterized by the following.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, a human body detecting section for detecting the presence or absence of a human body is added, so that the ambient illuminance is lower than a first set level and the human body is detected. When a human body is detected by the detector,
The lighting load is turned on.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a timer unit for measuring a preset time is added, and the human body detection signal is output from the human body detection unit at the same time as the time measurement. The lighting load is turned off when a predetermined time elapses after the start of the operation.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the various setting levels are variable in accordance with the frequency of detection of a human body by the human body detection unit. It is characterized by the following.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a clock is added,
At a set time and when the ambient illuminance falls below a first set level, the illumination load is turned on.

The invention according to claim 7 is the invention according to claim 6, characterized in that the various setting levels are variable according to the set time zone.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a lighting device according to the first embodiment of the present invention.

The lighting device according to the present embodiment includes a lighting load 1,
An illuminance sensor 2 for detecting ambient illuminance, a timer 3 for measuring a preset time, and a control unit 4 for controlling each unit
, A load control unit 5 and a power supply unit 6 for supplying power to each unit. The illuminance sensor 2 is configured to detect a change in illuminance based on a change in resistance value such as CdS. The controller 4 compares the detected resistance value with a preset value, and determines the lighting state of the illumination load 1 based on the comparison result. The control unit 4 is configured by, for example, a microcomputer or the like. The lighting state of the lighting load 1 is controlled via the load control unit 5 based on information from the control unit 4.

In this embodiment, as shown in FIG. 2, the control unit 4 has a first set level for detecting darkness and a second set level for dimming control, and the ambient illuminance is set to the second level. Control is performed so that the illumination load 1 is not turned on (maintained off) if it is higher than one set level, and is turned on (portion a in FIG. 2) if it is lower than the set level. The second setting level is set by the ambient illuminance including the illuminance (lamp illuminance) by the illumination load 1. When the lighting load 1 is turned on, the control unit 4 controls the dimming so that the ambient illuminance including the illuminance by the lighting load 1 becomes the second set level (portion b in FIG. 2).
For example, if the first setting level is 50 Lx and the second setting level is 750 Lx, the lighting load 1 is not turned on when the ambient illuminance is 700 Lx, but the lighting load 1 is turned on when the surrounding illuminance is 30 Lx. You. After the lighting load 1 is turned on, the surrounding illuminance including the illuminance by the lighting load 1 is 750 Lx.
The lighting state of the illumination load 1 is dimmed and controlled.
Note that the second set level does not necessarily have to be a constant value, and may have a certain range as shown in FIG. For example, 750Lx ± 1 instead of 750Lx constant
It may be 00Lx.

According to the present embodiment, the lighting load 1 is turned on when the ambient illuminance is higher than the first setting level, having the first setting level for light / dark detection and the second setting level for dimming control. (Maintains light off), if it is lower, it lights up and the dimming control is performed so as to be at the second set level.
Once turned on, the surrounding illuminance increases, so that 100% lighting is not continued even when the light may be turned off, and unnecessary lighting can be suppressed and optimal lighting can be performed.

Next, a second embodiment of the present invention will be described. In the above-described embodiment, as shown in FIG. 4, the output of the lighting load 1 is very low in a state where the dimming control is performed so that the ambient illuminance including the illuminance by the lighting load 1 is maintained at the second set level. When the output becomes smaller, a set output value is provided in advance, and when the output of the lighting load 1 falls below the set output value, the lighting load 1 is forcibly turned off (portion c in FIG. 4). It is.

According to the present embodiment, it is possible to avoid flickering that occurs when the output of the illumination load 1 becomes low. The fact that the output of the lighting load 1 has become so low that the flicker occurs indicates that the surrounding illuminance has sufficiently increased without including the illuminance caused by the lighting load 1.

Next, a third embodiment of the present invention will be described. In the present embodiment, in the first embodiment,
As shown in FIG. 5, a third setting level is provided. When the ambient illuminance including the illuminance by the illumination load 1 is controlled to keep the illuminance including the illuminance of the illumination load 1 at the second set level and the illuminance including the illuminance by the illumination load 1 exceeds the third set level, the illumination load is reduced. 1 is turned off. As shown in FIG. 6, the third setting level is such a value that the ambient illuminance not including the illuminance due to the illumination load 1 becomes high and it becomes difficult to perform dimming control to maintain the second setting level. Is set to

Next, a fourth embodiment of the present invention will be described. In the above-described embodiment, as shown in FIG. 7, a human sensor 7 is added, and the lighting state of the illumination load 1 is controlled in consideration of human body detection information from the human sensor 7. I have to. That is, as shown in FIG. 8, the ambient illuminance is lower than the first set level, and
When there is a human body detection input by the human sensor 7, the lighting load 1 is turned on, and after the lighting load 1 is turned on, while the lighting holding time by the timer 3 is operating, the ambient illuminance including the illuminance by the lighting load 1 Is controlled so that is maintained at the second set level. When the counting of the lighting holding time ends, the lighting load 1 is turned off.

Next, a fifth embodiment of the present invention will be described. In the present embodiment, in the above-described embodiment,
The first set level and the second set level are made variable according to the number of times the human body sensor 7 detects the human body per unit time. When the number of times of detection of the human body per unit time is smaller than the set value, the first set level is set higher than when the number is larger than the set value, and the light is turned on earlier. After the lighting load 1 is turned on, dimming control is performed so that the ambient illuminance including the illuminance by the lighting load 1 is maintained at the second set level.

For example, in an office where the number of times of human body detection is large, such as in an office, the first set level is 30L.
x, and in a corridor or the like where the number of human body detections is small, the first set level is set to 75Lx. In the former area, a human body is detected, and if the surrounding illuminance is 30 Lx or less, lighting is performed. In this area, since the number of human body detections is large, the illumination load 1 is turned on at a constant illuminance at the second set level without turning off the illumination load 1. In the latter area, when the ambient illuminance becomes 75 Lx or less, the illumination load 1 is turned on regardless of the detection of the human body. Therefore, in this area, if the surroundings are dark before the human body is detected, the lighting load is 1
Is turned on, and lighting with constant illuminance is performed at the second set level.
By doing so, it is possible to prevent the lighting load 1 from not lighting due to a human body detection error. In this area, since the number of times the human body is detected is small, the probability of the lighting load 1 not being turned on due to a detection error is high, which is effective.

When the number of times of human body detection such as working hours is large, the lighting load 1 is turned on in accordance with the input of human body detection and the surrounding illuminance. When the number of times of human body detection is small, such as early in the morning or late at night, human body detection is performed. The lighting load 1 is turned on according to the surrounding illuminance regardless of the input. In this case, the latter first set level is set to be larger than the former.

Next, a sixth embodiment of the present invention will be described. In the present embodiment, in the first and second embodiments, as shown in FIG. 9, a clock 8 is added, and the lighting control of the illumination load 1 is performed according to the set time. That is, if the set time and the ambient illuminance are equal to or lower than the first set level, the illumination load 1 is turned on. The load output at that time is set in advance, and the load output is made variable according to the time zone. For example, if the first set level, the load output, and the second set level according to the time zone are set to the values shown in FIG. 10, the first set level A in the evening as shown in FIG. To start from 30% load lighting. At midnight, the lighting is started at the first set level B from the lighting of the load of 15% (first set level A> first set level B). The lighting load 1 is dimmed at the second setting level C in the evening and at the second setting level D (first setting level C> first setting level D) at midnight.

Next, a seventh embodiment of the present invention will be described. This embodiment is a combination of the fourth embodiment and the sixth embodiment. That is, as shown in FIG. 12, in the first and second embodiments, a human sensor 7 and a clock 8 are added, and as shown in FIG. When there is a detection input and the ambient illuminance is equal to or lower than the first set level B, the lighting of 15% load is started. After the load is turned on, dimming control is performed so as to keep the ambient illuminance constant at the second set level D. After the counting of the lighting holding time is completed, the load is turned off.

Here, as shown in FIG. 14, when the ambient illuminance exceeds the second set level D during the dimming control operation at the second set level D (within the lighting holding time), the second set level D may be changed to the second set level D ', and the load output may be increased to achieve 100% lighting.

The present invention is also possible with other combinations of the embodiments described above.

[0030]

As described above, according to the lighting apparatus of the present invention, the first set level for detecting the brightness and the second level for controlling the dimming are provided.
, And lighting control of the lighting load is performed based on these setting levels, so that a lighting device capable of suppressing unnecessary lighting and performing optimum lighting can be provided.

Further, by turning off the lighting load at the third set level or controlling the lighting state in consideration of human body detection information and time information, useless lighting is further suppressed, and more optimal lighting is achieved. A lighting device that can be provided can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a lighting device according to a first embodiment of the present invention.

FIG. 2 is an operation sequence diagram according to the above.

FIG. 3 is an operation sequence diagram according to the above.

FIG. 4 is an operation sequence diagram according to a second embodiment of the present invention.

FIG. 5 is an operation sequence diagram according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of a third setting level according to the above.

FIG. 7 is a block diagram illustrating a schematic configuration of a lighting device according to a fourth embodiment of the present invention.

FIG. 8 is an operation sequence diagram according to the above.

FIG. 9 is a block diagram illustrating a schematic configuration of a lighting device according to a sixth embodiment of the present invention.

FIG. 10 is an explanatory diagram of each set value according to the above.

FIG. 11 is an operation sequence diagram according to the above.

FIG. 12 is a block diagram illustrating a schematic configuration of a lighting device according to a sixth embodiment of the present invention.

FIG. 13 is an operation sequence diagram according to the above.

FIG. 14 is an operation sequence diagram according to the above.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lighting load 2 illuminance sensor 3 timer 4 control unit 5 load control unit 6 power supply unit 7 motion sensor 8 clock

Claims (7)

[Claims] An illumination load, an illuminance sensor for detecting illuminance near the illumination load, and a control unit for controlling each unit, wherein a relationship between an illuminance value detected by the illuminance sensor and a set level The lighting device in which the lighting state of the lighting load is controlled by the lighting device has a first set level for detecting light and darkness and a second set level for dimming control, and the surrounding illuminance detected by the illuminance sensor is set to the first level. A lighting device, wherein a lighting load is turned on when the lighting load falls below a set level, and after the lighting, the lighting state of the lighting load is controlled such that the ambient illuminance becomes a second set level. 2. The lighting device according to claim 1, wherein the lighting device has a third set level, and turns off the lighting load when the ambient illuminance exceeds the third set level. 3. A human body detecting unit for detecting the presence or absence of a human body is added, and when the ambient illuminance is lower than a first set level and the human body is detected by the human body detecting unit, an illumination load is turned on. The lighting device according to claim 1 or 2, wherein: 4. A timer unit for measuring a preset time is added, and at the same time when a human body detection signal is output from the human body detection unit, the timer starts counting and turns off the lighting load when a predetermined time has elapsed. The lighting device according to claim 3, wherein: 5. The lighting device according to claim 1, wherein the various setting levels are variable according to a frequency of detecting a human body in the human body detecting unit. 6. The lighting device according to claim 1, wherein a clock is added, and the illumination load is turned on at a set time and when the ambient illuminance is lower than a first set level. The lighting device according to any one of the above. 7. The lighting device according to claim 6, wherein the various setting levels are variable according to a set time zone.