JP2012064525A - Lighting apparatus and lighting control system - Google Patents

Abstract

【Task】
Provided is a lighting device that can be formed at a low cost and can be made to leave a lighting area with high probability when it is not desired, and a lighting control system including the lighting device.
[Solution]
The lighting device 2 includes a lighting device body 4 in which a light emitting diode 6 is disposed, and a lighting device 5 that lights the light emitting diode 6. The lighting device 5 converts AC voltage into DC voltage. The DC conversion circuit 8, the DC-DC conversion circuit 9 that converts the DC voltage into a predetermined DC voltage, and outputs the DC-DC conversion circuit 9 so that a current flows through the light emitting diode 6 with an on-duty ratio of less than 100%. The control circuit 10 is configured to control the DC-DC conversion circuit 9 so that the frequency of the current flowing through the light emitting diode 6 is less than 100 Hz when a specific signal is input from the outside. ing.
[Selection] Figure 2

Description

  The present embodiment relates to a lighting device in which a light emitting diode is mounted as a light source, and a lighting control system including the lighting device.

  Since light-emitting diodes have low power consumption and a long lifetime, they have been used in general lighting equipment as a measure against global warming and environmental conservation in recent years. In addition to general lighting, the lighting fixture is used as, for example, a security light. That is, the luminaire includes a human body detection sensor that detects an intruder into a predetermined area. When the human body detection sensor detects the intruder, the light emitting diode as a light source blinks. By blinking the light emitting diode, it is possible to know an abnormal state such as the presence of an intruder (see, for example, Patent Document 1).

  Also, three light emitting diodes of red, green, and blue are provided as the main light source, and if the human sensor detects a person for a certain time or longer, each light emitting diode is turned on at a predetermined rate to threaten a suspicious person. The lighting fixture which blinks such a color is proposed (refer patent document 2).

Japanese Patent Laying-Open No. 2006-113752 (page 6, FIG. 1) JP 2010-33810 A (Page 4, FIG. 1)

  If there is no owner or manager in the vicinity of the predetermined area or lighting fixture, the intruder or the like cannot be notified to the owner or manager even if the light emitting diode blinks. The blinking of the light emitting diodes gives intruders a sense of intimidation and incongruity, but there is a risk that the intruders cannot leave the predetermined area by themselves.

  Also, the color light that can threaten a suspicious person varies from person to person. Therefore, some suspicious persons cannot be threatened, and there is a risk that intruders may not leave the predetermined area.

  An object of the present invention is to provide a lighting device that can be formed at a low cost and that can cause a person to leave a lighting area with a high probability when it is not desired, and a lighting control system including the lighting device.

  The illuminating device of this embodiment is configured to include an illuminating device main body and a lighting device.

  In the illumination device main body of the present embodiment, a light emitting diode is used as a light source, and this light emitting diode is disposed.

  The lighting device of the present embodiment includes an AC-DC conversion circuit that converts an AC voltage into a DC voltage, a DC-DC conversion circuit that converts the DC voltage into a predetermined DC voltage, and outputs the same to a light emitting diode, and 100% of the light emitting diode. It has a control circuit that controls the DC-DC conversion circuit so that a current flows with an on-duty ratio of less than.

  The control circuit is configured such that when a specific signal is input from the outside, the frequency of the current flowing through the light emitting diode is less than 100 Hz, and when the specific signal is not input, the frequency of the current flowing through the light emitting diode is 300 Hz or more. It controls the DC-DC conversion circuit.

  According to the present embodiment, since the lighting device controls the frequency of the current flowing through the light emitting diode to be less than 100 Hz when a specific signal is input from the outside, the light emitting diode blinks at a frequency of less than 100 Hz. It is possible to give psychological effects such as discomfort and anxiety to the person who is stopped in the lighting area of the lighting device by visual effects, and it is possible to leave the lighting area with high probability. It has the effect.

  In addition, since the lighting device controls the frequency of the current flowing through the light emitting diode to be 300 Hz or more when no specific signal is input from the outside, the light emitting diode blinks at a frequency of 300 Hz or more. There is an effect that the illumination area can be illuminated with brightness according to the on-duty ratio without causing discomfort to the person who is stopped in the illumination area.

  Since the frequency of the current flowing in the light emitting diode can be controlled by the control of the DC-DC conversion circuit by the control circuit, it is possible to omit another switching circuit or a cutoff circuit that causes the light emitting diode to blink at a predetermined frequency. Thus, the lighting device can be formed at low cost, and thus a lighting device that can be formed at low cost can be expected.

It is a block diagram of the illumination control system which shows Example 1 of this invention. Similarly, it is a schematic circuit diagram of a lighting device. Similarly, it is a wave form diagram which shows the period of on-duty. It is a block diagram of the illumination control system which shows Example 2 of this invention. It is a block diagram of the illumination control system which shows Example 3 of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the illumination control system 1 of the present embodiment includes an illumination device 2 and a human body detection device 3 as a detection device. The lighting device 2 includes the lighting device body 4 and the lighting device 5. The lighting device body 4 has a lighting device 5 and a light emitting diode 6 as a light source disposed therein.

  The illumination device body 4 is formed in a known shape, structure, or the like. A plurality of the light emitting diodes 6 are mounted on a substrate (not shown), and the light emitting diodes 6 are disposed in the illuminating device main body 4 so that the emitted light can be radiated outward from the illuminating device main body 4.

  The lighting device 5 lights the light-emitting diode 6 with an on-duty ratio of less than 100%, and in the present embodiment, the lighting device 5 is configured to be dimmed according to a dimming signal input from the outside. Further, the lighting device 5 is configured to input a specific signal output from the human body detection device 3 and to control the lighting state of the light emitting diode 6 according to the specific signal.

  The human body detection device 3 detects a human body that has entered the illumination area of the lighting device 2 by, for example, an image recognition of a human body detection sensor or a security camera (not shown), and when this detection takes a predetermined time or more, It is formed with a known configuration that outputs a specific signal. Here, the state in which the human body is detected for a predetermined time or more means an undesired specific state. And the human body detection apparatus 3 may be arrange | positioned in the illuminating device main body 4, and may be provided separately from the illuminating device main body 4. FIG.

  Hereinafter, the lighting device 5 will be described in detail.

  As shown in FIG. 2, the lighting device 5 includes an AC-DC conversion circuit 8, a DC-DC conversion circuit 9, and a control circuit 10. Then, the input terminals 11a and 11b are connected to the commercial AC power source Vs, and the output terminals 12a and 12b are connected to the light emitting diode 6 disposed in the lighting device body 4 to form an LED lighting device for lighting the light emitting diode 6. Has been. A plurality of the light emitting diodes 6 are connected in series.

  The AC-DC conversion circuit 8 includes a full-wave rectifier circuit 13, a boost chopper circuit 14, and a smoothing capacitor C1. The full-wave rectifier circuit 13 is formed with a noise filter circuit 16 formed with a full-wave rectifier 15 and a transformer T1. The input terminal of the full-wave rectifier 15 is connected to the input terminals 11 a and 11 b via the noise filter circuit 16. The output terminal on the low potential side of the full-wave rectifier 15 is connected to the ground E via the capacitor C2. The full-wave rectifier circuit 13 full-wave rectifies an AC voltage of the commercial AC power supply Vs, for example, AC 100 V, and outputs a full-wave rectified voltage between the output terminals of the full-wave rectifier 15.

  The step-up chopper circuit 14 chops the full-wave rectified voltage output from the full-wave rectifier circuit 13 by the on / off operation of the field effect transistor Q1 that is a switching element, and outputs a constant DC voltage, for example, DC 400V. Is formed. That is, it is formed having a series circuit of an inductor L1 and a field effect transistor Q1 connected between the output terminals of the full-wave rectifier 15, and a backflow prevention diode D1 connected to the inductor L1 and the drain of the field effect transistor Q1. Has been. A smoothing capacitor C1 is connected between the source of the diode D1 and the field effect transistor Q1.

  The step-up chopper circuit 14 generates a constant DC voltage, for example, DC 400 V, across the smoothing capacitor C1 when the field effect transistor Q1 is ON / OFF controlled by the control circuit 10 at a set frequency and on-duty.

  The DC-DC conversion circuit 9 is formed in a step-down chopper circuit. That is, it is formed having a series circuit of a field effect transistor Q2 and a diode D2 as a switching element connected in parallel to the smoothing capacitor C1, and an inductor L2 connected to the source of the field effect transistor Q2 and the diode D2. ing. A smoothing capacitor C3 is connected between the inductor L2 and the anode of the diode D2 via a resistor R1. That is, the output side of the DC-DC conversion circuit 9 is connected to the smoothing capacitor C3.

  The resistor R1 is connected between the anode of the diode D2 and the negative electrode side of the smoothing capacitor C3, and detects a current flowing in the DC-DC conversion circuit 9. The control circuit 10 performs on / off control of the field effect transistor Q2 based on the current, and generates a predetermined DC voltage across the smoothing capacitor C3.

  The DC-DC conversion circuit 9 steps down the constant DC voltage generated between both ends of the smoothing capacitor C1 by controlling the on / off of the field effect transistor Q2 by the control circuit 10, and between the both ends of the smoothing capacitor C3. A predetermined DC voltage is generated. In this way, the DC-DC conversion circuit 9 converts the DC voltage output from the AC-DC conversion circuit 8, for example DC 400V, to a predetermined DC voltage and outputs it.

  Both ends of the smoothing capacitor C3 are connected to the output terminals 12a and 12b. A predetermined DC voltage generated between both ends of the smoothing capacitor C3 is output to the output terminals 12a and 12b. A plurality of light emitting diodes 6 connected in series are connected to the output terminals 12a and 12b. The light-emitting diodes 6 connected in series emit light (lights up) when a predetermined current flows through the light-emitting diodes 6 connected in series.

  The control circuit 10 includes an integrated circuit (IC). A specific signal is input to the control circuit 10 from the human body detection device 3 shown in FIG. 1, and a dimming signal is input from a dimming device (not shown).

  Then, the control circuit 10 controls on / off of the field effect transistor Q1 of the step-up chopper circuit 14 so that a constant DC voltage, for example, DC 400V is generated between both ends of the smoothing capacitor C1, and a predetermined voltage is applied between both ends of the smoothing capacitor C3. The field effect transistor Q2 of the DC-DC conversion circuit 9 is controlled to be turned on / off so that a DC voltage is generated.

  The control circuit 10 is formed so as to turn on and off the field effect transistor Q2 of the DC-DC conversion circuit 9 so that a current flows through the light emitting diode 6 with an on-duty ratio of less than 100%. As shown in FIG. 3, the light-emitting diode 6 is lit by the current supplied from the smoothing capacitor C3 during the on-duty period. On the other hand, during the off-duty period, the current supply from the smoothing capacitor C3 becomes very small and turns off. The control circuit 10 turns on / off the field effect transistor Q2 at several tens of Kz during the on-duty period, and stops the on-off operation of the field effect transistor Q2 during the off-duty period. When the field effect transistor Q2 is stopped, the current from the AC-DC conversion circuit 8 is not supplied to the smoothing capacitor C3, and the voltage across the smoothing capacitor C3 rapidly decreases. As a result, no current can be supplied to the light emitting diode 6.

  The on-duty ratio is a ratio of the on-duty period to the total period (one cycle) of the on-duty period and the off-duty period. And the on-duty ratio of less than 100% can be set to 30 to 80%, for example. If there is an on-duty ratio of 80%, it is possible to obtain sufficient illumination light with the emitted light of the light emitting diode 6. Further, if the on-duty ratio is less than 30%, there is a possibility that the flicker effect due to illumination light cannot be obtained in an undesired specific state described later.

  By turning on the light emitting diode 6 with an on-duty ratio of less than 100%, no current flows through the light-emitting diode 6 during the off-duty period, so that power can be saved accordingly.

  Further, the control circuit 10 is configured to control the on / off of the field effect transistor Q2 so that the frequency of the current flowing through the light emitting diode 6 becomes 300 Hz or more when a specific signal is not input from the human body detection device 3. . Thereby, the light emitting diode 6 is lit (flashes) at a frequency of 300 Hz or more with a predetermined on-duty ratio. Here, the frequency of 300 Hz is such that the flickering of the light is not noticeable to the person when the light-emitting diode 6 blinks. Moreover, what is necessary is just to set suitably the upper limit of 300 Hz or more according to the control capability of the control circuit 10, for example, is 100 KHz. This frequency of 100 KHz is possible without making the control circuit 10 highly functional.

  In addition, the control circuit 10 is formed so as to turn on / off the field effect transistor Q2 so that the frequency of the current flowing through the light emitting diode 6 is less than 100 Hz when a specific signal is input from the external human body detection device 3. Has been. The light-emitting diode 6 blinks at a predetermined on-duty ratio, for example, an on-duty ratio for all light, at a frequency of less than 100 Hz. Here, the frequency of 100 Hz gives a person an uncomfortable feeling or the like because the light flickering of the light-emitting diode 6 is strong and noticeable. Further, the lower limit value of less than 100 Hz may be a frequency at which light flickering is conspicuous and can give psychological effects such as discomfort and anxiety. Even if the lower limit value is 1 Hz, it is possible to give the psychological effect, but in the present embodiment, the psychological effect is strongly given to a person by setting the lower limit value to 10 Hz.

  Further, the control circuit 10 is formed so that the light emitting diode 6 is dimmed and turned on in accordance with a dimming signal input from an external dimming device. That is, on / off control of the field effect transistor Q2 is performed in accordance with the dimming signal, and the on-duty period during which current flows through the light-emitting diode 6 is varied.

  The control circuit 10 turns on the light-emitting diode 6 with a predetermined on-duty ratio of less than 100%, and controls the field-effect transistor Q2 on and off according to the dimming signal, and is generated between both ends of the smoothing capacitor C3. The predetermined DC voltage may be varied. As a result, a DC voltage corresponding to the dimming signal is applied between both ends of the light emitting diodes 6 connected in series, and the current corresponding to the dimming signal flows through the light emitting diode 6 during the on-duty period. Light up.

  Next, the operation of the first embodiment of the present invention will be described.

  In FIG. 1, in a normal state, the lighting device 5 blinks the current flowing through the light-emitting diode 6 serving as a light source at a predetermined on-duty ratio of less than 100% corresponding to the dimming signal and at a frequency of 300 Hz or more. Note that the lighting device 2 normally disables the specific signal from the human body detection device 3. The illumination area of the illumination device 2 is illuminated with illuminance corresponding to the dimming signal. A person staying in the illumination area does not feel flickering with respect to the illumination light from the light emitting diode 6 and does not harm emotions such as discomfort by the illumination light.

  When it is desired that a person does not enter the illumination area of the illumination device 2, the illumination device 2 validates a specific signal from the human body detection device 3 by setting, for example.

  When a person enters the illumination area and is stopped for a predetermined time, that is, in an undesired specific state, a specific signal is output from the human body detection device 3, and the control circuit 10 of the lighting device 5 is output. Is input. The lighting device 5 blinks the light-emitting diode 6 so that the current flowing through the light-emitting diode 6 has an on-duty ratio (for example, 80%) for all light and a frequency of less than 100 Hz. The illumination area is illuminated with flickering illumination light from the light emitting diode 6. People who are staying in the lighting area will be discomforted by flickering of the lighting light, and emotions will be harmed, behavior will be suppressed, and it will eventually become impossible to withstand discomfort. To leave the lighting area.

  When a person leaves the illumination area, the specific signal is not output from the human body detection device 3, and the lighting device 5 has a predetermined on-duty ratio corresponding to the dimming signal and a frequency of 300 Hz or higher. Thus, the light emitting diode 6 is blinked. When the light emitting diode 6 is turned off at a frequency of less than 100 Hz when the light emitting diode 6 is turned off, the light emitting diode 6 is turned off.

  In this way, since a person who has entered the lighting area leaves the lighting area by flashing the light-emitting diode 6 at a frequency of less than 100 Hz, the person enters the lighting area during an undesired specific time period. In addition to being suppressed, it is not necessary to notify the owner or manager of the lighting device 2 of the intrusion of a person.

  As described above, according to the illumination control system 1 of the present embodiment, the lighting device 5 of the illumination device 2 causes the light emitting diode 6 to blink at a frequency of less than 100 Hz when a specific signal is input from the human body detection device 3. Therefore, the illumination light of the light emitting diode 6 flickers at a frequency of less than 100 Hz in the illumination area of the illumination device 2. As a result, it is possible to give psychological effects such as discomfort and anxiety to the person who is stopped in the lighting area by visual effects, and it is possible to leave the lighting area with high probability. Have.

  The lighting device 5 controls the light emitting diode 6 to blink at a frequency of 300 Hz or more with a predetermined on-duty ratio of less than 100% when a specific signal is not input from the human body detection device 3. The device 5) can save power, and the illumination area of the illumination device 2 is illuminated by a person without flickering the illumination light of the light-emitting diode 6, so that the person staying in the illumination area is uncomfortable. The illumination area can be illuminated with brightness according to the dimming signal.

  The on-duty ratio and frequency of the current flowing through the light-emitting diode 6 can be controlled by the on-off control of the field effect transistor Q2 of the DC-DC conversion circuit 9 by the control circuit 10, so that the frequency of the current flowing through the light-emitting diode 6 can be varied. Thus, another switching circuit for interrupting the light emitting diode 6 or a cutoff circuit can be omitted, and the lighting device 5 can be formed at low cost. Thereby, it has the effect that the illuminating device 2 and the illumination control system 1 can be formed in low cost.

  FIG. 4 is a block diagram of a lighting control system showing a second embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

  The illumination control system 18 shown in FIG. 4 is provided with a fire detection device 3A as a detection device in place of the human body detection device 3 in the illumination control system 1 shown in FIG. The fire detection device 3 </ b> A is configured to output a specific signal (fire signal) to the control circuit 10 of the lighting device 5 when the heat ray sensor or the smoke sensor 19 detects a fire. Here, the heat ray sensor or the smoke sensor 19 may be provided in the vicinity of the lighting device 2 or may be provided at a separated position. The detection of a fire by the heat ray sensor or smoke sensor 19 means an undesired specific state.

  In the lighting control system 18 of the present embodiment, when the fire detection device 3A detects the occurrence of a fire and outputs a specific signal, the light-emitting diodes 6 arranged in the lighting device body 4 blink at a frequency of less than 100 Hz. The illumination light of the illumination device 2 flickers at a frequency of less than 100 Hz. As a result, psychological effects such as discomfort and anxiety can be imparted to the person in the illumination area by visual effects, and the person can exit the illumination area with high probability. Therefore, when a fire occurs in or near the illumination area, the evacuees can be evacuated by themselves.

  FIG. 5 is a block diagram of a lighting control system showing Embodiment 3 of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

  The illumination control system 20 shown in FIG. 5 is provided with a radiation detection device 3B as a detection device in place of the human body detection device 3 in the illumination control system 1 shown in FIG. The radiation detection device 3 </ b> B is configured to output a specific signal (radiation leakage signal) to the control circuit 10 of the lighting device 5 when the radiation detector 21 detects radiation harmful to the human body. The radiation detector 21 is provided in the illumination area of the illumination device 2, in the vicinity of the illumination area, or at a position separated from the illumination area. The detection of radiation harmful to the human body by the radiation detector 21 means an undesired specific state.

  In the illumination control system 20 of the present embodiment, when the radiation detection device 3B detects the occurrence of radiation leakage and outputs a specific signal, the light-emitting diode 6 disposed in the illumination device body 4 blinks at a frequency of less than 100 Hz. . The illumination light of the illumination device 2 flickers at a frequency of less than 100 Hz. As a result, psychological effects such as discomfort and anxiety can be imparted to the person in the illumination area by visual effects, and the person can exit the illumination area with high probability. Therefore, when harmful radiation leakage occurs in or near the illumination area, the evacuees can be quickly evacuated by themselves.

DESCRIPTION OF SYMBOLS 1,18,20 ... Illumination control system, 2 ... Illuminating device, 3 ... Human body detection apparatus as detection apparatus, 3A ... Fire detection apparatus as detection apparatus, 3B ... Radiation detection apparatus as detection apparatus, 4 ... Illumination apparatus main body 5 ... lighting device 6 ... light emitting diode

Claims (2)

A lighting device body provided with a light emitting diode;
AC-DC conversion circuit for converting AC voltage to DC voltage, DC-DC conversion circuit for connecting the output side to the light emitting diode, converting the DC voltage to a predetermined DC voltage, and output, and less than 100% for the light emitting diode The control circuit controls the DC-DC conversion circuit so that a current flows at an on-duty ratio. The control circuit has a frequency of a current flowing through the light emitting diode of 100 Hz when a specific signal is input from the outside. And a lighting device configured to control the DC-DC conversion circuit so that the frequency of the current is 300 Hz or more when the specific signal is not input;
An illumination device comprising: A detection device that detects a specific undesired state and outputs a specific signal;
The lighting device according to claim 1, wherein the specific signal output from the detection device is input to a control circuit of the lighting device;
A lighting control system comprising:

Images