Power supply, lighting device, and lighting system

Abstract

To secure safety by appropriately determining abnormality in a power supply for driving a load whose number of connections can be changed.SOLUTION: A power supply for applying pulse current in which an ON period and an OFF period are repeated to a load includes: abnormality determination current value setting means for setting an abnormality determination ON current value; abnormality current value counting means for counting the number of times of an abnormal current value exceeding the abnormality determination ON current value; and abnormality determination means for determining abnormality when the number of times exceeds a constant value.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power supply with a safety function, and a lighting device and a lighting system using the power supply. [Background technology]

[0002] With the shift to LED lighting, it has become easier to adjust the brightness by dimming and the color temperature and hue by adjusting the color tone. Furthermore, because LEDs are smaller and easier to use than conventional light sources such as fluorescent lamps, strip light (also called flexible light) type lighting devices have become popular. Patent Document 1, which shows an example of such devices, describes the advantage that "multiple strip lights (described as lighting fixtures in Patent Document 1) can be connected together and extended to a desired length."

[0003] As such lighting devices have become more widespread, problems such as abnormal current generation have been reported. As a countermeasure, power supplies that automatically shut down when an abnormal load is detected have come into use.

[0004] Load abnormality detection in a power supply is shown in Patent Document 2. In a power supply (described as an LED lighting device in Patent Document 2), if an abnormality in an output current parameter is repeatedly detected for a certain period of one second or more, the supply of output current is stopped. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5452746 [Patent Document 2] Patent No. 6273894 Summary of the Invention [Problem to be solved by the invention]

[0006] When driving the tape light described in Patent Document 1, the power supply device that lights up the tape light has the problem that it is difficult to determine whether there is a load abnormality, because the current value that drives the load varies depending on the number of connected tape lights.

[0007] In Patent Document 2, an "overcurrent threshold" is set in the power supply, and when the detected current value exceeds the overcurrent threshold continuously for a predetermined time or more, it is determined that an abnormality has occurred and the protection circuit is activated. However, in the case of a light strip, the drive current value varies depending on the number of connected light strips, so a fixed "overcurrent threshold" cannot accommodate changes in the number of connected strips.

[0008] Furthermore, as a result of analyzing abnormal phenomena, the inventors of the present application found that short-term abnormal phenomena could occur that do not fall under the category of "the current detection value continuously exceeding the overcurrent threshold for a predetermined period of time or more," i.e., that would not be judged as abnormal by the method of Patent Document 2.

[0009] SUMMARY OF THE INVENTION It is therefore an object of the present invention to ensure safety by appropriately determining abnormalities in a power supply that drives a load whose number of connections may be variable. [Means for solving the problem]

[0010] The power supply of the present invention is a power supply that applies a pulse current in which an ON period and an OFF period are repeated to a load, an abnormality determination current value setting means for setting an abnormality determination ON current value; an abnormal current value counting means for counting the number of times an abnormal current value exceeds the abnormality determination ON current value; The device is provided with an abnormality determination means that determines that an abnormality has occurred when the number of times exceeds a certain value.

[0011] The power supply of the present invention includes an initial ON current value detection means for detecting an initial ON current value after the pulse current is applied to the load, The abnormality determination ON current value may be set based on the initial ON current value, and may be set to a current value that is larger than the initial ON current value and smaller than the maximum rated current value of the power supply.

[0012] The power supply of the present invention may further comprise a current stopping means for stopping application of current to the load when the abnormality determining means determines that an abnormality has occurred.

[0013] The power supply of the present invention may further comprise a current re-application means for applying a current to the load again after a certain time has elapsed since the current stopping means.

[0014] The present invention provides a lighting device comprising the above power supply and the load connected to the power supply, wherein the load is an LED, A plurality of such loads can be connected in series to the power supply.

[0015] The present invention provides a lighting system including an LED as a load, a power supply that applies current to the load, and a control device that communicates with the power supply, The power supply includes an abnormality determination current value setting means for setting an abnormality determination current value, an abnormal current value counting means for counting the number of times an abnormal current value exceeds the abnormality determination current value, an abnormality determination means for determining an abnormality when the number of times exceeds a certain value, and an abnormality notification means for communicating information about the abnormality determination to the control device. [Effects of the Invention]

[0016] According to the present invention, even when the current applied to the load varies due to the connection of the load or the like, safety can be ensured by properly detecting the abnormality and stopping the power supply as appropriate. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a diagram illustrating the configuration of a lighting device according to a first embodiment of the present invention; [Figure 2] Schematic circuit diagram of the light source module of embodiment 1 [Figure 3] Operation waveform diagram of the power supply of embodiment 1 [Figure 4] Enlarged schematic diagram of the operating waveform of the power supply of embodiment 1 [Figure 5] 1 is a diagram illustrating the configuration of a lighting device according to a second embodiment of the present invention; [Figure 6] 10 is a diagram showing the configuration of a lighting device according to a third embodiment of the present invention; [Figure 7] Schematic circuit diagram of a light source module according to a third embodiment [Figure 8] Chromaticity coordinate diagram of the light source of embodiment 3 DETAILED DESCRIPTION OF THE INVENTION

[0018] <Embodiment 1> <Configuration> 1 shows the configuration of a lighting device 100 of this embodiment. A power supply 140 is composed of a DC power supply 130 and a driver 134. Commercial power 120 is converted into a DC output by the DC power supply 130, which is input to the driver 134, and the output of the driver 134 drives a light source module 150, which is a load. The load may be a single light source module 150A, or may be a combination of two light source modules, 150A and 150B. The driver 134 is controlled by a lighting control device 160.

[0019] <Power supply> The power supply 140 consists of a DC power supply 130 and a driver 134 . The DC power supply 130 receives commercial power 120 of 100 or 200V·50 or 60Hz in Japan from a terminal 131 and outputs an LED drive output of, for example, DC 24V from an output connector 138 .

[0020] In FIG. 1 showing the configuration of a DC power supply 130, a rectifying / switching unit 132 performs voltage conversion by rectifying AC power and performing switching operations.

[0021] The driver 134 receives the output 133 from the rectifying and switching unit 132 , converts it into an LED drive output, and outputs it from an output connector 138 .

[0022] The dimming unit 135 adjusts the ON period (T ON ) and OFF period (T OFF ) is the dimming rate = T ON / (T ON +TOFF ) waveform, for example, PWM output (described later). Note that the frequency f (f = 1 / (T ON +T OFF )) was set to 1 kHz or 20 kHz.

[0023] The current value of the output of dimming unit 135 is monitored by current detection unit 136, and the information is sent to control unit 137. If control unit 137 determines that the current value is abnormal, it stops rectification / switching unit 132 or dimming unit 135 in accordance with an algorithm described later, thereby stopping the LED drive output. In other words, control unit 137 functions as a current stopping means.

[0024] The driver 134 supplies a constant voltage output of DC 24V to the load, which is the light source module 150. The load seen from the DC power supply 130 may be one light source module 150A, or two light source modules 150A and one light source module 150B. In other words, since the number of loads is not fixed, when many loads are connected, the drive current value must be increased.

[0025] An output connector 138 of the driver 134 is connected to an input connector 151 of the light source module 150. An output connector 158 of the light source module 150 is connectable to an input connector 151 of another light source module 150.

[0026] <Lighting control> Lighting control software 161 (not shown) is installed in the lighting control device 160, and a brightness adjustment (dimming) interface is displayed on a screen 162. A chromaticity adjustment (color adjustment) interface may also be displayed (used in other embodiments). The user controls the lighting using this interface. In addition to manual control as described above, the control terminal may automatically control the dimming and color adjustment of the lighting device according to a schedule pre-programmed by the lighting control software 161. In either case, the lighting control signal transmitted via radio 168 is received by the wireless module 148.

[0027] A wireless module 148 that receives radio signals 168 and sends the lighting control signal contained in the radio signals 168 to the control unit 137 is attached to a slot 139 of the driver 134. The wireless module 148 is removable from the slot 139, and when removed, the driver 134 operates at a dimming rate of 100%.

[0028] The wireless module 148 sends a lighting control signal to the control unit 137, and the control unit 137 sends a dimming signal corresponding to the lighting control signal to the dimming unit 135.

[0029] <Light source module circuit> 2 shows a schematic circuit diagram (simplified circuit diagram) of light source module 150. Drive line 152D and ground line 152G are connected to input connector 151. Power is supplied from drive line 152D, and white LED 153N and constant current IC 156N are connected in series. As a result, a constant current can be supplied to white LED 153N, which is a constant current load with diode characteristics, using driver 134, which is a constant voltage source of DC 24V.

[0030] The drive line 152D and the ground line 152G are connected to an output connector 158. Therefore, the output connector 158 can be connected to another light source module 150 to supply power.

[0031] <Driving current waveform and abnormality detection algorithm> 3 shows the time changes in voltage and current of the power supply of embodiment 1. The horizontal axis is time t, and the vertical axis is current values ​​(mA) for I(PS) and I(L), and voltage values ​​(V) for V(PS) and V(L). FIG. 4 is an enlarged schematic view of a portion indicated by Q in FIG.

[0032] In FIG. 3, I(PS) and V(PS) are the output current and output voltage of the DC power supply 130, respectively. I(L) and V(L) are the output current and output voltage, respectively, of the driver 134. This waveform is a PWM waveform, but because it turns on and off suddenly relative to the horizontal scale, it appears to have widths above and below on this graph, with the upper part being the peak value. For the sake of explanation, the horizontal axis indicating time t is divided into periods T1 to T11.

[0033] S01: Initial ON current value detection step (initial ON current value detection means) A load assumed to be normal (hereinafter referred to as "normal load") is connected, and a pulse current is applied to the normal load during T1 (initial ON current value detection period) in Fig. 3. At this time, for example, control unit 137 and current detection unit 136 operate as a detection means for the initial ON current value, and detect the peak value of the initial current value I(L0) during an ON period of, for example, 10 seconds. The value is stored in the memory in the control unit 137. It should be noted that even if the load is a normal load, it is assumed to be a normal load at the beginning of use, so the initial ON current value of the normal load may be used.

[0034] The ON current value during the initial ON current detection period will fluctuate slightly, but will be within a certain range. The initial ON current value may be a value within this range. For example, the maximum value of the initial ON current value during the initial ON current detection period may be taken. Alternatively, the average value of the initial ON current value during the initial ON current detection period may be taken.

[0035] During the initial ON current value detection period, the dimming rate may be set to 100% and the pulse OFF period may be set to zero.

[0036] S02: Abnormality determination ON current value setting step (abnormality determination ON current value setting means) The control unit 137 operates as an abnormality determination ON current value setting unit, and sets a current value I(La) that is larger than the initial ON current value I(L0) by a predetermined value as the abnormality determination ON current value.

[0037] The abnormality determination ON current value may be, for example, a value obtained by adding a fixed current value such as 1 A to the initial current value I(L0) of the ON period, or may be a value obtained by multiplying the initial current value I(L0) of the ON period by a multiplication factor, for example, 1.1 times the initial current value.

[0038] The abnormality determination ON current value is a current value smaller than the maximum rated current value of the power supply, making it possible to determine abnormalities even for loads that only flow currents equal to or less than the maximum rated current value. Note that the abnormality determination ON current value set using the above calculation may be a current greater than the maximum rated current value, in which case the maximum rated current value is set as the abnormality determination ON current value.

[0039] S03: Abnormal current value count step (abnormal current value count means) To test for an abnormal state, a load that would cause an abnormal phenomenon was connected and a pulse current I(L) was applied after the period T3 in Figure 3. Note that in the DC power supply 130, current is applied again to the driver 134 during the period T3, but there may be a delay of the period T3 before the driver 134 applies current to the load during the period T4.

[0040] The control unit 137 and current detection unit 136 operate as abnormal current value counting means, monitoring the signal from the current detection unit and counting the number of times the abnormal current value exceeds the abnormality determination ON current value I(La) as shown by 1 to 5 in Fig. 4. Subsequent ON current values ​​I(L) do not exceed the abnormality determination ON current value I(La) and are therefore not counted. If an abnormality were to be detected by exceeding the abnormality determination ON current value just once, the power supply may be stopped due to the influence of sudden noise, so the operation is designed to stop the current only in the event of an abnormality that continues for a certain period of time.

[0041] S04: Abnormality determination step (abnormality determination means) The control unit 137 determines that an abnormality has occurred when the number of times the abnormal current value described above exceeds a certain value, for example, 30 times in the PWM waveform.

[0042] However, if the judgment is based solely on the number of times an abnormal current value occurs, when the dimming ratio is 100% or when the output is continuous due to non-dimming, the "number of times an abnormal current value occurs" will be 1 and no "abnormality" will be determined. I(L) in Figure 3 is a pulse waveform, but if it is a continuous waveform, the time during which an abnormal current value is shown will also be measured, as in T4 in Figure 3, and if that time is equal to or exceeds a predetermined value, an abnormality will be determined. The "time during which an abnormal current value is shown" may include an OFF period.

[0043] S05: Current stop step In period T5, control unit 137 and dimming unit 135 operate as a current stopping means, and when the current value is determined to be abnormal in abnormality determination step S04, control unit 137 stops the application of current to the load by, for example, issuing an instruction to set the dimming rate of dimming unit 135 to zero. Control unit 137 may also stop DC power supply 130.

[0044] S06: Current reapplication step (current reapplication means) If the abnormality is temporary and has already returned to normal, there is little need to continue stopping operation after S05. Therefore, after a certain time (period T5), such as 3 seconds, during periods T6 and T7, control unit 137 and dimming unit 135 operate as current re-application means, re-apply pulse current to the load, and repeat S03 "abnormal current value count step." Note that while DC power supply 130 re-applies current to driver 134 during period T6, there may be a delay of period T6 before period T7, when current is applied to the load by driver 134.

[0045] S07: Complete stop step (complete stop means) If the abnormality determination step of S04 is repeated and the current re-application step of S06 is repeated two or three times, it can be determined that the abnormality is not temporary. Therefore, in Fig. 3, in the period T11 after S06 is repeated three times, the control unit 137 completely stops the power supply.

[0046] S08: Abnormality notification step (abnormality notification means) If the power supply completely stops, it is necessary for a human to inspect the abnormality. Therefore, it is desirable that the current stop state be communicated to a control device such as the lighting control device 160 or a smartphone via wireless communication using, for example, the wireless module 148 of the power supply 140, and that the control device display an alert. In this case, the control unit 137 and the wireless module 148 function as an abnormality notification means.

[0047] Since the power supply 140 may be installed in a place that is not visible to humans, such as in the ceiling, simply turning on the abnormality warning lamp of the power supply 140 as an alert may not be enough to alert humans. However, by transmitting the alert to the control device by the abnormality notification means, it is possible to notify humans that an abnormality has occurred.

[0048] The alert may be an audible warning from the power supply 140. In this case, it is desirable to be able to stop the audible warning using, for example, a control device.

[0049] <Embodiment 2> <Configuration> 5 shows the configuration of lighting device 300 of this embodiment. Power supply 340 is made up of DC power supply 330 and driver 334. Commercial power 120 is converted into a DC output by DC power supply 330, which is input to driver 334. The output of driver 334 drives light source modules 150A and 150B, which are loads.

[0050] <Power supply and abnormality detection algorithm> The DC power supply 130 comprises a rectifying / switching unit 332, a current detecting unit 336, and a control unit 337B. As in the first embodiment, the current detecting unit 336 performs the steps S01: detecting an initial ON current value, and the control unit 337B performs the steps S02: setting an ON current value for determining an abnormality, S03: counting an abnormal current value, S04: determining an abnormality, and S05: stopping the current. In the current stopping step, the operation of the rectifying / switching unit 332 stops.

[0051] Driver 334 has a slot 339, a control unit 337A, and a dimming unit 335. A wireless module 148 is attached to slot 339. Wireless module 148 receives radio signals 168 transmitted by lighting control device 160 and sends a lighting control signal to control unit 337A. Dimming unit 335 converts output 333 of DC power supply 130 into a PWM output corresponding to the lighting control signal.

[0052] As described above, the current detection unit is first placed, followed by the dimming unit, in the second embodiment. Because a PWM waveform current flows in the current detection unit, each step in the abnormality determination algorithm is the same as in the first embodiment.

[0053] <Embodiment 3> In the lighting device 200 of this embodiment, color adjustment is performed using LEDs of multiple colors.

[0054] <Configuration> 6 shows the configuration of the lighting device 200 of this embodiment. The power supply 240 is composed of a DC power supply 130 and a driver 234. The commercial power 120 is converted into a DC output by the DC power supply 130, which is input to the driver 234, and the output of the driver 234 drives the light source module 250, which is the load. The load may be only the first light source module 250A, or may be a combination of the first light source module 250A and the second light source module 250B. The driver 234 is controlled by the lighting control device 160.

[0055] <Power supply> The DC power supply 130 in the power supply 240 receives commercial power 120 from a terminal 131 and rectifies it using a rectifying and switching unit 132 .

[0056] The driver 234 generates three PMW outputs in the dimming units 235Bw, 235Yw, and 235R according to the dimming ratios of the LEDs of each color.

[0057] A wireless module 148 is attached to a slot 239 of the driver 234. The wireless module 148 receives radio signals 168 transmitted by the lighting control device 160 and sends lighting control signals to the control unit 237. The lighting control signals are 3-channel signals to drive three different colored LEDs. The wireless module 148 is removable from the slot 239.

[0058] The wireless module 148 sends the illumination control signal to the control unit 237. The control unit 237 sends a dimming signal corresponding to the illumination control signal to the dimming units 235Bw, 235Yw, and 235R.

[0059] The driver 234 outputs three LED drive outputs corresponding to the three color LEDs at an output connector 238 .

[0060] The input connector 251 of the first light source module 250A is connected to the output connector 238 of the driver 234 and receives the LED drive output. The output connector 258 of the first light source module 250A is connected to the input connector 251 of the second light source module 250B as needed, but the second light source module 250B does not have to be connected. Further, other light source modules 250 may be connected to the second light source module 250B, and the number of connections is determined by the output of the driver 234.

[0061] The outputs of the dimming units 235Bw, 235Yw, and 235R are detected by current detection units 236Bw, 236Yw, and 236R to detect the current values ​​during the ON period, respectively, and the control unit 237 detects abnormalities based on the detection signals in steps S01 to S06, as in embodiment 1.

[0062] <Light source module> A circuit diagram of the light source module 250 is shown in Figure 7. The light source module 250 includes a bluish-white LED 253Bw, a yellowish-white LED 253Yw, and a red LED 253R, each connected in series to a corresponding constant current IC 256Bw, 256Yw, or 256R. Driving power is supplied to the LEDs of each color via drive lines 252Bw, 252Yw, or 252R, respectively. A ground line 252G is shared by the LEDs of each color.

[0063] The input connector 251 connects the drive lines 252Bw, 252Yw, 252R and the ground line 252G to the driver 234. The output connector 258 connects the drive lines 252Bw, 252Yw, 252R and the ground line 252G to the light source module 250.

[0064] <Light source> The bluish-white LED 253Bw emits light with a chromaticity in the range enclosed by (0.336, 0.24), (0.352, 0.44), (0.15, 0.2), and (0.2, 0.1) in the CIE 1931 chromaticity coordinates of FIG. 8, and one example is (0.23, 0.26).

[0065] The red LED 253R emits light with a chromaticity in the range enclosed by the chromaticity boundary line E, i.e., (0.66, 0.23), (0.423, 0.355), and (0.5, 0.5) in the chromaticity coordinates of Figure 8, and is (0.60, 0.38) as an example. Note that this is not the same as the general definition of red.

[0066] The yellow-white LED 253Yw emits light with a chromaticity in the range surrounded by (0.5, 0.5), (0.423, 0.355), (0.342, 0.312), (0.352, 0.44), (0.37, 0.63) and the chromaticity boundary line E in the chromaticity coordinates of FIG. 8, and one example is (0.44, 0.47).

[0067] By controlling the ratio of the light emission intensity of these three colors, it is possible to reproduce a wide range of colors in practical use, such as colors in line with blackbody radiation, such as 1800K to 12000K, and the colors of blue skies and sunsets.

[0068] To expand the color reproduction range, three primary colors, red (R), blue (B), and green (G), which are close to the chromaticity boundary, may be used. However, using three colors, including two non-primary color LEDs, R, Bw, and Gw, has the advantage of being able to achieve a relatively good power-to-luminous flux conversion efficiency (lm / W) compared to using the three primary colors, RGB, which are close to the chromaticity boundary.

[0069] <Abnormality detection algorithm> In the lighting device 200, the operations S01 to S06 shown in FIG. 3 and the enlarged view of FIG. 4 are performed for the drive current of each of the three color LEDs.

[0070] If the control unit 237 determines that the conditions for proceeding to "S07: Complete Stop Step" are met based on the detection result of any one of the current detection units 236Bw, 236Yw, and 236R, the control unit 237 issues an instruction to completely stop all outputs, including outputs of other colors for which no abnormalities have occurred.

[0071] If a complete stop occurs due to an abnormality, the abnormality is notified to the control device in "S08: abnormality notification step." The alert issued by the control unit 237 notifying that the current has stopped is preferably transmitted to the lighting control device 160 or a control device including a smartphone, for example, via wireless communication using the wireless module 148 of the power source 240, and the control device then displays the alert.

[0072] It is desirable that the control device display information on which of the three channel outputs an abnormality has occurred.

[0073] The alert may be generated by the power supply 140 as a warning sound (including voice). For example, it is desirable to issue a voice message such as "There is an abnormality in the red load" that specifically indicates the abnormality. In this case, it is desirable to be able to stop the warning sound using, for example, a control device.

[0074] <Modifications and other changes> The above describes an embodiment of the lighting device according to the present invention, but the exemplified lighting device can also be configured as follows, for example, and it goes without saying that the present invention is not limited to the lighting device as shown in the above embodiment.

[0075] Although the DC power supply and driver that make up the power supply are described separately, the functions of both may be contained in a single power supply housing.

[0076] The power supply 140 may not include the dimming unit 135, and the output current of the rectifying and switching unit 132 may be detected by the current detection unit 136. In this configuration, if an abnormality in the current value is detected, the output of the rectifying and switching unit 132 is stopped.

[0077] The power supply 240 may also be configured to have a current detection unit on the DC power supply side, as in embodiment 2. In that case, since there is only one current detection unit, it is not possible to detect the current value for each color.

[0078] In the second embodiment, the driver 334 may be omitted. In that case, the load is driven without dimming.

[0079] The load of the power supply may be a regular LED lighting fixture that cannot be bent, other than a strip light.

[0080] The load of the power supply may not be connectable or disconnectable.

[0081] The number of colors of LEDs used in the light source module is one in the first and second embodiments and three in the third embodiment, but it may be two colors, for example, a high color temperature white LED and a low color temperature white LED, or four or more colors.

[0082] In the schematic diagram of the light source module, one set of LEDs connected in series is shown, but a plurality of LEDs connected in series may also be connected in parallel.

[0083] Although the description has been given assuming that a pulse output having an ON period and an OFF period is output to the LED, there may be no OFF period when the dimming rate is 100%, etc. In that case, the abnormality determination ON current value becomes the abnormality determination current value, the abnormality determination ON current value setting means becomes the abnormality determination current value setting means, and the initial ON current value becomes the initial current value.

[0084] The PWM in PWM output stands for Pulse Width Modulation, and ON or T OFF At least one of the following must be modulated. ON +T OFF = constant. ON +T OFF It may be PFM (Pulse Frequency Modulation) or the like, in which the frequency is not constant.

[0085] Wireless communication may be any communication method other than wired communication, such as radio waves or infrared.

[0086] The device that receives the alert from the power supply is not limited to a lighting control device, but can be any control device such as a general smartphone, tablet, PC, or device with a processor. Communication between the power supply and the control device can be wired or wireless.

[0087] It should be noted that the above-described embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. Therefore, the technical scope of the present invention should not be interpreted solely by the above-described embodiments, but should be defined by the claims. Furthermore, all modifications within the scope and meaning equivalent to the claims are included. [Explanation of symbols]

[0088] 100, 200, 300 lighting equipment 120 Commercial power 130, 330 DC power supply 131 terminals 132, 332 Rectification and switching unit 133, 333 output 134, 234, 334 drivers 135, 235Bw, 235Yw, 235R, 335 Dimmer 136, 236Bw, 236Yw, 236R, 336 Current detection unit 137, 237, 337A, 337B control section 138, 238 output connector 139, 239, 339 slots 140, 240, 340 power supply 148 Wireless Module 150, 150A, 150B, 250, 250A, 250B Light Source Module 151, 251 input connector 152D, 252Bw, 252Yw, 252R drive wire 152G, 252G ground wire 153N white LED 156N, 256Bw, 256Yw, 256R constant current IC 158, 258 output connector 160 Lighting control device 161 Lighting Control Software 162 screens 168 Wireless 253Bw blue white LED 253R Red LED 253Yw yellow white LED

Claims

1. A power supply that applies a pulse current in which an ON period and an OFF period are repeated to a load, an abnormality determination current value setting means for setting an abnormality determination ON current value; an abnormal current value counting means for counting the number of times an abnormal current value exceeds the abnormality determination ON current value; The power supply is provided with an abnormality determination means that determines that an abnormality has occurred when the number of times exceeds a certain value.

2. the power supply includes an initial ON current value detection means for detecting an initial ON current value after the pulse current is applied to the load; The abnormality determination ON current value is set to a current value that is larger than the initial ON current value and smaller than the maximum rated current value of the power supply.

10. The power supply of claim 1.

3. a current stopping means for stopping application of current to the load when the abnormality determination means determines that an abnormality has occurred; 10. The power supply of claim 1.

4. a current re-application means for re-applying current to the load after a certain time has elapsed since the current stopping means was applied; 4. The power supply of claim 3.

5. 10. A lighting device comprising: the power supply according to claim 1; and the load connected to the power supply, wherein the load is an LED, A lighting device in which a plurality of the loads can be connected in series to the power supply.

6. 1. A lighting system comprising: an LED as a load; a power supply that applies a current to the load; and a controller in communication with the power supply, The power supply an abnormality determination current value setting means for setting an abnormality determination current value; an abnormal current value counting means for counting the number of times an abnormal current value exceeds the abnormality determination current value; an abnormality determination means for determining that an abnormality has occurred when the number of times exceeds a certain value; an abnormality notification means for communicating information on the abnormality determined to the control device; Lighting system.

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