JP2015035302A - Power supply device for outdoor illumination, road lamp, and tunnel lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device capable of dimming light while guaranteeing energy-saving performance without giving a user a sense of discomfort, in stepwise dimming control of outdoor illumination.SOLUTION: A power supply device 1 for outdoor illumination comprises: a dimming control part 3 having a dimming target decision part 334 deciding a target dimming rate from an inputted dimming input signal, a transition time period decision part 335 deciding a transition time period in which a dimming rate decreases from an initial dimming rate to the target dimming rate on the basis of a dimming reduction amount from the initial dimming rate to the target dimming rate before the decision of the target dimming rate, and a dimming command output part 336 changing a dimming command value according to the target dimming rate or the dimming reduction amount and the transition time period, the dimming control part 3 being configured so that the transition time period becomes longer as the dimming reduction amount becomes larger; and a power supply part 2 supplying an output power depending on the dimming command value to a light source 4.

Description

  The present invention relates to a power supply device for outdoor lighting, and a road lamp and a tunnel lamp using the same.

  Outdoor lighting such as road lights and tunnel lights may be dimmed to save energy. For example, in Patent Literature 1, in road lighting, the illuminance of the illuminating lamp (3) is increased only in a time zone where the traffic volume is high by combining the timer (1) that stores the illuminance switching time in advance and the dimmer (2). And the light control system which makes illumination intensity low is disclosed at the time zone when there is little traffic.

  Patent Document 2 discloses a prediction unit (5) that predicts traffic in a tunnel at a predetermined time, and a dimming control unit (3) that controls the brightness of the tunnel lamp (1) based on a predicted value by the prediction unit. ) Is disclosed.

  Further, Patent Document 3 discloses vehicle sensing means (S1 to S6) for detecting the entry of the vehicle into each block divided in the tunnel, and the brightness of the tunnel lamp (1) based on the detection result by the vehicle sensing means. Disclosed is a tunnel light control device including a dimming control means (3) for controlling the light. According to this document, the tunnel light in the block ahead of the vehicle entry block is increased, while the tunnel light in the block behind the vehicle entry block is dimmed.

JP 2003-168575 A JP 7-326210 A JP-A-10-334711

  However, according to the configuration of each of the above patent documents, steep dimming may give a driver, rider, pedestrian, and the like (hereinafter referred to as “user”) on the road uncomfortable. For example, according to the road illumination system of Patent Document 1, the illuminance is instantaneously switched from the all-light output to the dimming output at night (22:00) when the traffic volume decreases. However, there is a possibility that there is a user on the road even in a time zone when the traffic volume decreases, and a user who encounters a sudden light reduction may be upset. In the tunnel light control device of Patent Document 2, the illuminance is instantaneously switched from the all-light output to the dimming output as the traffic volume decreases. Similarly to the above, there is a possibility that a traveling vehicle may exist in the tunnel even during a time period when the traffic volume decreases, and a user who encounters a sudden light reduction in the tunnel will feel uneasy. In the case of outdoor lighting, unlike indoor lighting, the user's anxiety as described above is promoted due to the fact that dimming is performed regardless of the user's intention. Furthermore, in the dimming of outdoor lighting such as road lights and tunnel lights, since a large number of lighting devices are dimmed all at once, the user's uncomfortable feeling is amplified.

  On the other hand, if the dimming speed is made too slow when the decrease in illuminance at the time of dimming is made gentle, it becomes difficult to obtain a desired energy saving effect. Particularly in outdoor lighting such as road lights and tunnel lights, a large number of lighting devices are controlled at a time. Therefore, if the time to reach the target dimming state is excessively long, the energy saving effect is greatly diminished. In particular, as in Patent Document 3, when dimming is performed between brightenings, if the dimming speed in the dimming control is low, the next brightening control is performed without sufficient dimming, and the desired lightening control is performed. The energy saving effect may not be obtained.

  Therefore, an object of the present invention is to provide a power supply device that can reduce light without giving a sense of incongruity to a user and ensuring energy saving in step dimming control of outdoor lighting. Another object of the present invention is to provide a road light and a tunnel light using such a power supply device.

  A power supply device for outdoor lighting according to the present invention is a power supply device for outdoor lighting, and a dimming target determining unit that determines a target dimming rate from an input dimming input signal, before the determination of the target dimming rate Based on the amount of dimming reduction from the initial dimming rate to the target dimming rate, the transition time determining unit that determines the transition time during which the dimming rate decreases from the initial dimming rate to the target dimming rate, and the target dimming rate Alternatively, a dimming command output unit that changes the dimming command value according to the dimming reduction amount and the transition time, and a dimming control unit configured to increase the transition time as the dimming reduction amount increases, A power supply unit that supplies output power corresponding to the light command value to the light source.

  According to the above configuration, the time to complete dimming is longer for a large amount of illuminance reduction that causes a greater visual effect, and the time to dimming is shortened for a small amount of illuminance that has little visual effect. Therefore, in the step dimming control, it is possible to eliminate visual discomfort when the illuminance reduction amount is large and to realize energy saving when the illuminance reduction amount is small.

  The power supply device further includes a transition time shortening unit that shortens the transition time after the input of the predetermined dimming input signal when the dimming control unit receives the predetermined dimming input signal during the transition time. Further prepare. Here, it is preferable that the transition time shortening unit sets the transition time after the input of the predetermined dimming input signal to zero when the predetermined dimming input signal is input during the transition time. According to this, at the time of evaluation, inspection, etc., the target dimming rate can be obtained without waiting for completion of the transition period, and workability is improved.

  Furthermore, the dimming control unit may be configured such that the transition speed obtained by dividing the dimming decrease amount by the transition time decreases as the dimming decrease amount increases. According to this, the illuminance change is slow at a large illuminance change amount that has a larger visual effect, and the illuminance change is fast at a small illuminance change amount that has little visual effect. It is possible to further ensure the elimination of energy and the realization of energy saving.

  A road lamp according to the present invention includes the power supply device described above, a pole in which the power supply device is built, a light source, and a lamp body on which the light source is disposed and attached to one end of the pole. According to this, even when step dimming control is performed on the road, it is possible to realize energy saving without giving the user a sense of incongruity.

  A tunnel lamp according to the present invention includes the power supply device described above, a light source, and a housing in which the power supply device and the light source are built. According to this, even when the step dimming control is performed in the tunnel, it is possible to realize energy saving without giving the user a sense of incongruity.

It is a block diagram which shows the power supply device and step dimming control system for outdoor illumination by the 1st Embodiment of this invention. It is a figure which shows an example of the step light control by the 1st Embodiment of this invention. It is a figure which shows the other example of the step light control by the 1st Embodiment of this invention. It is a figure which shows the transition time shortening control in the step light control by the 1st Embodiment of this invention. It is a flowchart which shows the step light control by the 1st Embodiment of this invention. It is a figure which shows an example of the step light control by the 2nd Embodiment of this invention. It is a figure which shows the road light and road light system by the 3rd Embodiment of this invention. It is a figure which shows the tunnel lamp and tunnel lamp system by the 4th Embodiment of this invention.

Embodiment 1. FIG.
<Power supply device and step dimming control system>
FIG. 1 shows a block diagram of a power supply device 1 for outdoor illumination and a step dimming control system 5 according to a first embodiment of the present invention. The power supply device 1 includes a power supply unit 2 and a dimming control unit 3, AC power AC is supplied via wirings W1 and W2, and output power from the power supply unit 2 is LED unit 4 via wirings W3 and W4. To be supplied. For convenience of explanation, the power supply unit 2 and the dimming control unit 3 are arranged in separate blocks, but they may be integrated. Thus, in the description in this specification, it is convenient for each block to belong to which block, and the present invention is not bound thereto. The step dimming control system 5 includes a power supply device 1 and a controller 6.

  The power supply unit 2 includes a rectifier circuit 201, a transformer 202, a switching element 203, a diode 204, a smoothing capacitor 205, a current control circuit 206, a current detection resistor 207, a photocoupler 208, and a PWM control circuit 209. The transformer 202, the switching element 203, the diode 204, and the smoothing capacitor 205 constitute a main circuit unit of the flyback converter, and the current control circuit 206, the current detection resistor 207, the photocoupler 208, and the PWM control circuit 209 are the control unit of the flyback converter. Configure. The main circuit portion of the flyback converter in the present embodiment is an insulating flyback converter, and constitutes a so-called one-converter flyback step-down circuit having a power factor improving function. If the power supply unit 2 can supply a direct current to the LED unit 4, the power supply unit 2 may include other components such as a power factor correction circuit and a flyback converter circuit, a power factor correction circuit, and a non-insulated step-down chopper circuit. A step-down converter may be used.

  The rectifier circuit 201 is composed of a diode bridge, and the input voltage from the AC power supply AC is full-wave rectified by the rectifier circuit 201, and the full-wave rectified output from the rectifier circuit 201 is input to the flyback converter. Energy is accumulated by the primary winding of the transformer 202 during the ON period of the switching element 203, and the energy is charged to the smoothing capacitor 205 from the secondary winding side of the transformer 202 via the diode 204 during the OFF period of the switching element 203. . The step-down ratio is determined by the turn ratio of the secondary winding to the primary winding, and the output current is determined by the ON duty (ON period width) in the PWM control of the switching element 203.

  The current control circuit 206 determines an on-duty in PWM control of the switching element 203 according to a dimming command value from the dimming control unit 3 described later. For example, the current control circuit 206 includes an error amplifier, and outputs an error amplification signal so that the output current (LED current) detected by the current detection resistor 207 matches the command value from the dimming control unit 3. The error amplification signal from the current control circuit 206 has its reference potential converted by the photocoupler 208 from the secondary side reference potential of the transformer 202 to the primary side reference potential and input to the PWM control circuit 209. The PWM control circuit 209 performs PWM control of the switching element 203 according to the input error amplification signal.

  The dimming control unit 3 includes dimming input circuits 31 and 32 and a microcomputer (MC) 33, and determines a dimming command value to the power supply unit 2 according to the dimming input signals D1 and D2 from the controller 6. . In the present embodiment, switching between all light, dimming, and extinction is controlled stepwise (ie, step dimming control is performed). In other words, the dimming input signals D1 and D2 are signals instructing all light, dimming at a predetermined dimming level, and turning off alone or in combination.

  The dimming input signal may be a logic signal that specifies all light, dimming or dimming rate, or extinguishing depending on the logic level, or a pulse-like switching signal that is input every time the dimming rate is switched. Alternatively, it may be a PWM signal that specifies all light, dimming rate, or extinguishing by on-duty. In the following description, it is assumed that the dimming input signal is the logic signal.

  The dimming input circuit 31 includes a rectifier circuit 311, a voltage dividing circuit 312, and a photocoupler 313. The rectifier circuit 311 is composed of a diode and constitutes an input circuit. In the voltage dividing circuit 312, the dimming input signal D1 is divided so that the amplitude becomes a desired voltage, and the divided dimming input signal D1 is input to the photocoupler 313. The reference potential of the dimming input signal D1 is converted into the reference potential of the MC 33 by the photocoupler 313 and input to the input / output interface (I / O) 331 of the MC 33. The dimming input circuit 32 also includes a rectifier circuit 321, a voltage dividing circuit 322, and a photocoupler 323, and the configuration and operation thereof are the same as those of the dimming input circuit 31 described above.

  The MC 33 includes an I / O 331, a CPU 332, a memory 333, a dimming target determination unit 334, a transition time determination unit 335, a dimming command output unit 336, and a transition time shortening unit 337, which are connected to each other by a bus 338. ing.

  The CPU 331 is a processor that controls the exchange of signals between the units, and the memory 332 is a memory that stores programs and data. The CPU 331 identifies whether or not the logic of the dimming input signals D1 and D2 input via the dimming input circuits 31 and 32 is switched. That is, the step dimming control is started when there is a change in the logic of the dimming input signal D1 or D2.

  The dimming target determination unit 334 determines the logic of the dimming input signals D1 and D2, and determines the target dimming rate based on a combination of these logics. The correspondence between the combination of the logic states of the dimming input signal and the dimming rate can be arbitrarily set. For example, when the logics of the dimming input signals D1 and D2 are both low (that is, none of the dimming input signals D1 and D2 is received), the dimming target determination unit 334 sets the target dimming rate. 100% (that is, all light). When the logic of the dimming input signal D1 is high and the logic of the dimming input signal D2 is low (that is, when only the dimming input signal D1 is received), the dimming target determination unit 334 The target dimming rate is determined to be 70%. When the logic of the dimming input signal D1 is low and the logic of the dimming input signal D2 is high (that is, when only the dimming input signal D2 is received), the dimming target determination unit 334 The target dimming rate is determined to be 50%. Then, when the logics of the dimming input signals D1 and D2 are both high (that is, when the dimming input signals D1 and D2 are received), the dimming target determination unit 334 sets the target dimming rate to 25. % Can be determined.

  Alternatively, if the logic of the dimming input signals D1 and D2 are both high (i.e., if the dimming input signals D1 and D2 are received), the dimming target determination unit 334 determines the target dimming rate. May be determined to be 0% (that is, extinguished). In this case, when only the dimming input signal D1 is received, the dimming target determination unit 334 determines the target dimming rate as 50%, and when only the dimming input signal D2 is received. The dimming target determination unit 334 can determine the target dimming rate as 25%. The correspondence between the combination of the logic state of the dimming input signal and the dimming rate is not limited to the above, and the step dimming control may be performed based on another correspondence relationship. As described above, a configuration in which more post-stages are applied may be employed.

  The transition time determination unit 335 changes from the initial dimming rate before the start of the step dimming control, that is, before the determination of the target dimming rate, to the target dimming rate determined by the dimming target determining unit 334 (hereinafter, Based on the “dimming reduction amount”), the transition time for the dimming rate to decrease from the initial dimming rate to the target dimming rate is determined. Specifically, the transition time determination unit 335 increases the transition time as the dimming reduction amount increases. Note that the dimming reduction amount can be defined by the dimming rate difference, ratio, or the like. For example, when the dimming rate is reduced from the initial dimming rate of 100% to the target dimming rate of 25%, the dimming reduction amount may be defined as 75% that is the difference, or the ratio is 4 (= 100/25).

  The dimming command output unit 336 changes the dimming command value to the power supply unit 2 according to the transition time determined by the transition time determination unit 335 up to the target dimming rate determined by the dimming target determination unit 334. . With this transition control, the transition time from the initial dimming rate to the target dimming rate becomes longer as the amount of change in illuminance before and after dimming switching is larger. The dimming command value controlled by the dimming command output unit 336 is output to the current control circuit 206 of the power supply unit 2 via the I / O 331.

  During the transition control, the transition time shortening unit 337 identifies the presence or absence of a predetermined dimming input signal (hereinafter referred to as “cancel signal”) that can be used for evaluation, inspection, and the like, and detects the cancel signal. Output instantaneous transition command. When the instantaneous shift command is input, the dimming command output unit 336 stops the shift control and shifts the dimming command value to the target dimming rate instantaneously. In other words, the transition time shortening unit 337 sets the remaining transition time after the cancellation signal is received to substantially zero.

  Here, the cancel signal may be configured by the logic switching interval of the dimming input signal. For example, after the dimming input signal D1 becomes high and the transition control is started, a cancel signal may be formed when the logic of the dimming input signal D1 becomes low and becomes high again during the transition period. . Alternatively, a cancel signal is formed when either of the dimming input signals D1 and D2 is high and the transition control is started and then the logic of both the dimming input signals D1 and D2 is inverted within the transition period. You may be made to do. The dimming control unit 3 may have a configuration in which a dimming input circuit that individually receives an evaluation / inspection signal such as a cancel signal and an input port of the MC 33 corresponding thereto are separately provided. The transition time shortening unit 337 discriminates the presence or absence of a cancel signal by identifying such a specific pattern or change of the dimming input signal, and outputs an instantaneous transition command when the cancel signal is present.

  The LED unit 4 includes a plurality of LED elements 401 connected in series, and a DC output current from the power supply unit 2 is supplied via the wirings W3 and W4.

  The controller 6 outputs the dimming input signals D1 and D2 described above to the power supply device 1 (the dimming control unit 3) via the wirings W5, W6, and W7. Therefore, the controller 6 can cause the power supply device 1 to perform step dimming control for instructing a predetermined target dimming rate and shift time reduction control by outputting a cancel signal. 1 shows a configuration in which one power supply device 1 is connected to one controller 6, but a configuration in which a plurality of power supply devices 1 are connected to one controller 6 is also possible. In this case, the dimming input signals D1 and D2 are common to the power supply devices 1. Moreover, it is good also as a structure by which the one or more power supply devices 1 are connected to the some controller 6. FIG.

  FIG. 2 shows an example of step dimming control according to the present embodiment. In FIG. 2, the horizontal axis represents time (seconds), and the vertical axis represents light output (%). Line A shows the dimming from 100% (total light) to 50%, and line B shows the dimming from 100% (all light) to 25%. For line A, a dimming input signal for setting the target dimming rate to 50% is input at time t1, the dimming command value reaches the target dimming rate at time t2, and the transition control ends. For line B, a dimming input signal for setting the target dimming rate to 25% is input at time t1, the dimming command value reaches the target dimming rate at time t5, and the transition control ends.

  When the dimming reduction amount is defined by the difference of the dimming rate, the dimming reduction amount in the line A is 50%, and the dimming reduction amount in the line B is 75%. Thus, since the dimming reduction amount in the line B is larger than the dimming reduction amount in the line A, the transition time (t1 to t5) in the line B is longer than the transition period (t1 to t2) in the line A. Transition control is performed. For example, the transition period on line A is 1 second and the transition period on line B is 10 seconds.

  FIG. 3 shows another example of step dimming control according to the present embodiment. In FIG. 3, the horizontal axis represents time (seconds), and the vertical axis represents light output (%). Line B shows the transition control in dimming from 100% (all light) to 25%, as in FIG. 2, and line C shows dimming from 70% (all light) to 25%. The transition control in light is shown. For line B, a dimming input signal for setting the target dimming rate to 25% is input at time t1, the dimming command value reaches the target dimming rate at time t5, and the transition control ends. For line C, a dimming input signal for setting the target dimming rate to 25% is input at time t1, the dimming command value reaches the target dimming rate at time t3, and the transition control ends.

  When the dimming reduction amount is defined by the difference in the dimming rate, the dimming reduction amount on the line B is 75%, and the dimming reduction amount on the line C is 45%. Thus, since the dimming reduction amount in the line C is smaller than the dimming reduction amount in the line B, the transition time (t1 to t3) in the line C is shorter than the transition period (t1 to t5) in the line B. Transition control is performed. For example, the transition period on line B is 10 seconds and the transition period on line C is about 6 seconds.

  FIG. 4 shows the transition time reduction control in the step dimming control according to this embodiment. In FIG. 4, the horizontal axis represents time (seconds), and the vertical axis represents light output (%). With respect to the line D, it is assumed that all the lights are turned on until time t1, a dimming input signal for setting the target dimming rate to 25% is input at time t1, and a cancel signal is input at time t4. At time t4, the transition time shortening unit 337 sets the transition time after time t4 to zero. That is, the dimming control unit 3 instantaneously sets the dimming command value to 25% at time t4, and ends the transition control.

FIG. 5 is a flowchart showing the step dimming control of the power supply device 1.
It is assumed that lighting is performed at a given dimming rate (including all light) at the time of step S10. In step S10, a change occurs in the logic of the dimming input signal from the controller 6, and the dimming target determination unit 334 determines the target dimming rate based on the dimming input signal.
In step S15, the transition time determination unit 335 obtains the dimming reduction amount from the initial dimming rate and the target dimming rate, and determines the transition time based on the dimming reduction amount.
In step S20, the dimming command output unit 336 determines the dimming command value according to the target dimming rate determined in step S10 or the dimming reduction amount determined in step S15, and the transition time determined in step S15. Start transition (reduction).

  In step S25, the transition time shortening unit 337 determines whether or not there is a cancel signal. When the cancel signal is not detected (No at Step S25), the process proceeds to Step S35. When the cancel signal is detected (Yes in step S25), in step S30, the transition time shortening unit 337 sets the remaining transition time to zero and ends the transition period.

  In step S <b> 35, the CPU 301 determines whether or not the dimming command value output by the dimming command output unit 336 has reached the target dimming rate. If the dimming command value has not reached the target dimming rate (step S35, No), the process returns to step S25. If the dimming command value has reached the target dimming rate (step S35, Yes), the process ends.

  As described above, according to the power supply device 1 of the present embodiment, the dimming controller 3 determines the target dimming rate from the dimming input signal, the dimming target determination unit 334, from the initial dimming rate to the target dimming rate. And a dimming command output unit 336 for changing the dimming command value according to the target dimming rate or dimming reduction amount and the transition time. And it is comprised so that transfer time may become long, so that the light control fall amount is large. In this way, the transition time is longer for large illuminance reductions that have a greater visual impact, and the transition time is short for small illuminance reductions that have less visual impact. Therefore, in the step dimming control, it is possible to eliminate visual discomfort when the illuminance reduction amount is large and to realize energy saving when the illuminance reduction amount is small.

  Further, according to the power supply device 1 of the present embodiment, when a predetermined dimming input signal is input during the transition time, the transition time shortening unit 337 of the dimming control unit 3 inputs the predetermined dimming input signal. The transition time after the hour is shortened, preferably zero. Therefore, at the time of evaluation, inspection, etc., the target dimming rate can be obtained without waiting for the transition period, and workability is improved.

Embodiment 2. FIG.
In the above-described embodiment, a configuration in which a long transition time is set with respect to an increase in the dimming reduction amount has been shown. The speed is set. In this embodiment, the operation of the transition time determination unit 335 is different from that of the first embodiment, and the configuration and operation of other parts are the same as those of the first embodiment. Therefore, hereinafter, only the transition time determination unit 335 and the related description will be described.

  In the present embodiment, the transition time determination unit 335 determines the dimming speed until the dimming rate reaches the target dimming rate from the initial dimming rate based on the dimming reduction amount. Specifically, the transition time determination unit 335 determines the transition time or the transition speed so that the dimming rate obtained by dividing the dimming decrease amount by the transition time becomes smaller as the dimming decrease amount is larger. As a result, the larger the dimming reduction amount, the longer the transition time, and the larger the dimming reduction amount, the slower the dimming speed.

  Therefore, the aspects of line A and line B in FIG. 2 apply not only to the transition control in the first embodiment, but also to the transition control in the present embodiment. In the case of FIG. 2, the dimming speed is 50% / s (= 50% / 1 s) in the line A where the dimming reduction amount is 50%, while the dimming reduction amount is 75% in the line B The dimming rate is 7.5% / s (= 75% / 10s). FIG. 6 shows an example of step dimming control according to this embodiment. The horizontal axis in FIG. 6 is time (seconds), the vertical axis is light output (%), and the line B is dimmed from 100% (total light) to 25% as in FIG. The line C ′ shows the transition control in the dimming from 70% (total light) to 25%. For the line C ′, a dimming input signal for setting the target dimming rate to 25% is input at the time t1, and the dimming command value reaches the target dimming rate at the time t3 ′ (for example, 3 s) and shift control is performed. Ends. In the line B where the dimming reduction amount is 75%, the dimming speed is 7.5% / s as in FIG. 2, whereas in the line B where the dimming reduction amount is 45%, the dimming speed is 15%. % / S (= 45% / 3 s). Thus, the dimming speed monotonously decreases with respect to the dimming reduction amount.

  As described above, according to the present embodiment, the illuminance change is delayed in the illuminance decrease amount that causes a larger visual influence, and the illuminance change is accelerated in the small illuminance decrease amount that has a small visual influence. It is possible to further ensure the user's uncomfortable feeling and realize energy saving.

Embodiment 3. FIG.
<Road lights and road light systems>
FIG. 7 shows a road lamp 10 and a road lamp system 15 as a third embodiment of the present invention. In addition, a figure is a schematic diagram and is not as the dimension. The road lamp 10 includes a pole 11 and a lamp body 12. The pole 11 is a hollow body, and one end is embedded in the ground G. The power supply device 1 is attached to the hollow portion of the pole 11 and is supplied with power from the AC power supply AC via the wires W1 and W2, and receives the dimming input signals D1 and D2 from the controller 6 via the wires W5, W6, and W7. To do. The lamp body 12 includes an LED unit 4 that is attached to the upper end of the pole 11 and is attached so that the lower part can be irradiated. As described above, the output power of the power supply device 1 is supplied to the LED unit 4 via the wires W3 and W4.

  The road lamp system 15 includes a road lamp 10 installed on the road and a controller 6 connected to the road lamp 10. The AC power supply AC and the dimming input signals D1 and D2 are common to the road lights 10. The controller 6 need not be embedded in the ground G. Further, although three road lights 10 are shown in the figure, the number of road lights may be two or less, or four or more.

  Thus, according to the road lamp 10 and the road lamp system 15 of the present embodiment, even when performing step dimming control on the road, it is possible to realize energy saving without giving the user a sense of incongruity.

Embodiment 4 FIG.
<Tunnel light and tunnel light system>
FIG. 8 shows a tunnel lamp 20 and a tunnel lamp system 25 as a fourth embodiment of the present invention. In addition, a figure is a schematic diagram and is not as the dimension. The tunnel lamp 20 includes a casing 21, and the casing 21 is attached to the tunnel inner wall T. The casing 21 is provided with the power supply device 1 and the LED unit 4. The power supply device 1 is supplied with power from the AC power supply AC through the wirings W1 and W2, and receives the dimming input signals D1 and D2 from the controller 6 through the wirings W5, W6, and W7. Similar to the above embodiments, the output power of the power supply device 1 is supplied to the LED unit 4 via the wirings W3 and W4.

  The tunnel light system 25 includes a plurality of tunnel lights 20 attached to a tunnel inner wall T and a controller 6 connected to the plurality of tunnel lights 20. Although three road lights 10 are shown in the figure, the number of road lights may be two or four or more.

  As described above, according to the tunnel light 20 and the tunnel light system 25 of the present embodiment, even when performing step dimming control in the tunnel, it is possible to realize energy saving without giving the user a sense of incongruity. .

<Modification>
Although the preferred embodiment of the present invention has been described above, the present invention can be modified in various ways as described below.

-Modification of light source In each said embodiment, although LED unit 4 was used as a light source, even if it is a case where a light source is a fluorescent lamp, a high pressure discharge lamp, etc., this invention is applicable.

-Application to dimming control when extinguished In each of the above-described embodiments, the step dimming control is described by exemplifying the target dimming rate of 50% and 25%, but the target dimming rate is limited to these. Absent. In particular, the present invention can be applied even when the target dimming rate is 0%, that is, when the light is extinguished. Therefore, the present invention includes a case where the dimming command is a turn-off command.

-Modification of transition time shortening control In each of the above embodiments, when transition time shortening control is performed, a configuration in which the remaining transition time after reception of the cancel signal is zero is shown. The remaining transition time may not be zero as long as it is shortened. For example, the dimming speed after receiving the cancel signal may be accelerated.

DESCRIPTION OF SYMBOLS 1 Power supply device 2 Electric power supply part 3 Dimming control part 4 LED unit (light source)
DESCRIPTION OF SYMBOLS 10 Road light 11 Pole 12 Lamp main body 20 Tunnel light 21 Case 334 Dimming target determination part 335 Transition time determination part 336 Dimming command output part 337 Transition time shortening part

Claims (6)

A power supply for outdoor lighting,
Based on the dimming reduction amount from the initial dimming rate to the target dimming rate before the determination of the target dimming rate, the dimming target determining unit that determines the target dimming rate from the input dimming input signal, A transition time determining unit that determines a transition time for decreasing the dimming rate from the initial dimming rate to the target dimming rate, and a dimming command value according to the target dimming rate or the dimming decrease amount and the transition time A dimming control unit configured to change the transition time as the dimming decrease amount increases.
A power supply device comprising: a power supply unit that supplies output power corresponding to the dimming command value to the light source.   The power supply device according to claim 1, wherein the dimming control unit sets the transition time after the input of the predetermined dimming input signal when the predetermined dimming input signal is input during the transition time. A power supply apparatus further comprising a transition time shortening unit for shortening.   The power supply device according to claim 2, wherein the transition time shortening unit calculates the transition time after the input of the predetermined dimming input signal when the predetermined dimming input signal is input during the transition time. A power supply configured to be zero.   4. The power supply device according to claim 1, wherein, in the dimming control unit, as the dimming decrease amount increases, a transition speed obtained by dividing the dimming decrease amount by the transition time decreases. Power supply configured in   The power supply device according to any one of claims 1 to 4, a pole in which the power supply device is incorporated, the light source, and a lamp body on which the light source is disposed and attached to one end of the pole. Provided road lights. A tunnel lamp comprising the power supply device according to claim 1, the light source, and a housing in which the power supply device and the light source are incorporated.

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