JP2018120670A - Lighting device and lighting apparatus - Google Patents

Abstract

The present invention relates to a lighting device and a lighting fixture, and an object thereof is to obtain a lighting device and a lighting fixture capable of notifying a user of a load state.
A lighting device according to the present invention controls a voltage detection circuit that detects a voltage that changes in accordance with a value of a load connected to an output terminal, and controls the lighting of a light source. And a control device that notifies the user in the case of a predetermined abnormal voltage range. The lighting fixture which concerns on this invention is equipped with this lighting device and this light source.
[Selection] Figure 2

Description

  The present invention relates to a lighting device and a lighting fixture.

  A lamp socket to which a plurality of straight tube lamps are attached may be used with some straight tube lamps removed. Patent Document 1 discloses a lamp socket that enables thinning-out lighting of a straight tube lamp without newly using a short-circuit connector or the like.

Japanese Patent Laying-Open No. 2015-122167

  When using a lamp socket in which two straight tube lamps are connected in parallel to the lighting device with one straight tube lamp removed, the load is halved when viewed from the lighting device. For this reason, it may become a low load state from the time of normal operation | movement, and may turn off with the protection operation of a lighting device. At this time, there has been a problem that it is impossible to determine whether the protection operation is due to a failure of the lighting device or the protection operation is based on a load state different from the normal operation such as low load or overload.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain a lighting device and a lighting fixture that can notify a user of a load state.

  A lighting device according to the present invention controls a voltage detection circuit that detects a voltage that changes in accordance with a value of a load connected to an output terminal, and lighting of a light source, and a detection voltage of the voltage detection circuit is predetermined. And a control device that notifies the user in the case of an abnormal voltage range.

  In the lighting device according to the present invention, the value of the load connected to the output terminal of the lighting device is detected as the detection voltage. The control device notifies the user when the detected voltage is in the abnormal voltage range. For this reason, the user can be notified of the state of the load connected to the output terminal.

2 is a circuit block diagram of the lighting fixture according to Embodiment 1. FIG. FIG. 5 is a diagram for explaining the operation of the lighting fixture according to Embodiment 1. FIG. 3 is a diagram showing an LED current waveform according to the first embodiment. 6 is a circuit block diagram of a lighting fixture according to Embodiment 2. FIG.

  A lighting device and a lighting fixture according to an embodiment of the present invention will be described with reference to the drawings. The same or corresponding components are denoted by the same reference numerals, and repeated description may be omitted.

Embodiment 1 FIG.
FIG. 1 is a circuit block diagram of a lighting fixture 100 according to Embodiment 1. The lighting fixture 100 according to the present embodiment includes a light source module 11. The light source module 11 is, for example, a straight tube lamp or an LED module. The light source module 11 includes a plurality of light sources 11a. The plurality of light sources 11a are connected in series, parallel, or series-parallel. The light source 11a is, for example, an LED. The number of light sources 11a included in the light source module 11 may be plural.

  The light source module 11 includes a lamp detection resistor 13. Of the plurality of light sources 11a connected in series, the anode of the light source 11a at one end and one end of the lamp detection resistor 13 are connected. Of the plurality of light sources 11a connected in series, the cathode of the light source 11a at the other end and the other end of the lamp detection resistor 13 are connected.

  The lighting fixture 100 includes a lighting device 12. The light source module 11 is connected to the output end 60 of the lighting device 12. The lighting device 12 turns on the light source 11a. The lighting device 12 includes a DC power supply 2. The DC power supply 2 is connected to the AC power supply 7 through a wall switch. The AC power source 7 is an external power source. The rectifier circuit 8 included in the DC power supply 2 is connected to the AC power supply 7. A capacitor 9 is connected in parallel to the output terminal of the rectifier circuit 8. The capacitor 9 is a smoothing capacitor.

  A first voltage dividing circuit is connected to the capacitor 9 in parallel. The first voltage dividing circuit includes a resistor 31 and a resistor 32 connected in series. The voltage applied across the capacitor 9 is divided by the resistors 31 and 32 and input to the control device 40. The first voltage dividing circuit detects a voltage corresponding to the voltage obtained by rectifying the AC power supply 7.

  One end of the inductor 10 is connected to the high potential side of the rectifier circuit 8. The other end of the inductor 10 is connected to the first terminal of the switching element Q1 and the anode of the diode 14. The switching element Q1 is a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). The first terminal of the switching element Q1 is a drain.

  The second terminal of the switching element Q1 is connected to the low potential side of the rectifier circuit 8. The second terminal of the switching element Q1 is a source. The control terminal of the switching element Q1 is connected to the control device 40. The control terminal is a terminal for switching between the first terminal and the second terminal. The control terminal is a gate. The positive electrode of the capacitor 17 is connected to the cathode of the diode 14. The capacitor 17 is an electrolytic capacitor. The negative electrode of the capacitor 17 is connected to the low potential side of the rectifier circuit 8.

  Inductor 10, switching element Q1, diode 14 and capacitor 17 constitute a boost chopper circuit. A second voltage dividing circuit is connected to the capacitor 17 in parallel. The second voltage dividing circuit includes a resistor 15 and a resistor 16 connected in series. The voltage applied across the capacitor 17 is divided by resistors 15 and 16 and input to the control device 40. From the above, the DC power supply 2 is configured.

  The resistors 15 and 16 are provided at the output end of the DC power supply 2. The resistors 15 and 16 detect the output voltage of the DC power supply 2. The detection voltage applied to the resistor 16 is input to the control device 40. Based on this detected voltage, control device 40 turns on / off switching element Q1 so that the output voltage of DC power supply 2 becomes constant.

  The lighting device 12 includes a buck converter circuit 3. The buck converter circuit 3 is connected to the output of the DC power supply 2. The positive electrode of the capacitor 17 is connected to the first terminal of the switching element Q2. The switching element Q2 is a MOSFET. The first terminal of the switching element Q2 is a drain. The cathode of the diode 21 is connected to the second terminal of the switching element Q2. The second terminal of the switching element Q2 is a source. The anode of the diode 21 is connected to the negative electrode of the capacitor 17. That is, a series circuit including the switching element Q2 and the diode 21 is connected in parallel with the capacitor 17.

  A control terminal of the switching element Q2 is connected to the control device 40. The control terminal is a gate. The inductor 22, the capacitor 23, and the detection resistor 24 are connected in this order to form a series circuit. This series circuit is connected to the diode 21 in parallel. The inductor 22 is used as a choke coil. A voltage detection circuit 50 is connected to the capacitor 23 in parallel. The voltage detection circuit 50 includes a resistor 51 and a resistor 52 connected in series. The voltage applied across the capacitor 23 is divided by resistors 51 and 52 and input to the control device 40. Thus, the buck converter circuit 3 is configured.

  The detection resistor 24 is used to detect the LED current flowing through the light source module 11. A detection voltage corresponding to the LED current is applied to the detection resistor 24. The detection voltage is input to the control device 40. Based on this detected voltage, the control device 40 turns on and off the switching element Q2 so that the LED current flowing through the light source module 11 becomes a constant current.

  The voltage detection circuit 50 is provided at the output end 60 of the lighting device 12. The voltage detection circuit 50 is used to detect a voltage applied to the light source module 11. The detection voltage Vd applied to the resistor 52 is input to the control device 40. The control device 40 detects the presence / absence of connection of the light source module 11 and a voltage abnormality based on the detection voltage Vd.

  The control device 40 controls lighting of the light source 11a. The control device 40 uses a microcomputer which is a digital power supply control device. An arithmetic device such as a DSP (Digital Signal Processor) may be used. The lighting device 12 includes a control power generation circuit 110. The control power generation circuit 110 is connected to the positive electrode of the capacitor 17. The control power supply generation circuit 110 generates and outputs a power supply for the control device 40 based on the output voltage rectified and boosted by the DC power supply 2. Power for the control device 40 is supplied from the control power generation circuit 110.

The control device 40 includes two control circuits, a storage unit, an A / D conversion circuit, and a processing device.
The two control circuits, the storage unit, the A / D conversion circuit, and the processing device are connected to each other via an internal bus. The two control circuits output PWM (Pulse Width Modulation) signals to the switching elements Q1 and Q2, respectively. The PMW signal switches the switching elements Q1 and Q2.

  The storage unit includes, for example, a nonvolatile memory. The storage unit stores a calculation program executed by the processing device and various data used for the calculation. The storage unit is provided so that data can be written and read from the outside. The processing device calculates an on-time or the like in the switching control of the switching elements Q1 and Q2.

  The detection voltage from the first voltage dividing circuit, the second voltage dividing circuit, the voltage detection circuit 50 and the detection resistor 24 is input to the control device 40. The A / D conversion circuit converts these detection voltages into digital values. The processing device executes arithmetic processing using this digital value. A preset target voltage is stored in the storage unit. The control device 40 performs constant voltage control by adjusting the ON time of the switching element Q1 so that the output voltage of the DC power supply 2 matches the target voltage.

  The luminaire 100 includes a dimmer 28 and a dimming signal interface (I / F) circuit 4. A dimming command value from the dimmer 28 is input to the control device 40 via the dimming signal I / F circuit 4. The control device 40 adjusts the ON time of the switching element Q2 based on the LED current detected by the detection resistor 24 so that the LED current matches the target current determined based on the dimming command value.

  The lighting device 12 includes a communication unit 111. The communication unit 111 receives a radio signal from the remote controller 20. The communication unit 111 is connected to the control device 40. The radio signal is input to the control device 40 via the communication unit 111. In addition, the control device 40 transmits a radio signal to the remote controller 20 via the communication unit 111.

  FIG. 2 is a diagram for explaining the operation of the lighting apparatus 100 according to Embodiment 1. Lighting fixture 100 according to the present embodiment has a notification function. The notification function is a function for notifying the user when a light source module that is not suitable for the lighting device 12 is connected. The luminaire 100 includes a notification unit. The control device 40 controls the notification unit to notify the user when a light source module that is not adapted to the lighting device 12 is connected. In the present embodiment, the notification unit includes a light source 11a.

  In the storage unit of the control device 40, four threshold values Vth1 to Vth4 are stored in advance. The second threshold value Vth2 is smaller than the first threshold value Vth1. The third threshold value Vth3 is smaller than the second threshold value Vth2. The fourth threshold value Vth4 is smaller than the third threshold value Vth3.

  The control device 40 performs control so that the output current from the output end 60 becomes constant. For this reason, the voltage applied to the output end 60 increases as the value of the load connected to the output end 60 increases. The voltage detection circuit 50 detects a voltage applied to the output terminal 60. That is, the detection voltage Vd of the voltage detection circuit 50 increases as the value of the load connected to the output terminal 60 increases.

  The first threshold value Vth1 is a threshold value for determining the open state. The first threshold value Vth1 is set so that the detection voltage Vd is equal to or higher than the first threshold value Vth1 when the output terminal 60 is in the open state. The fourth threshold value Vth4 is a threshold value for determining a short circuit. The fourth threshold value Vth4 is set so that the detection voltage Vd becomes smaller than the fourth threshold value Vth4 when the output terminal 60 is short-circuited.

  The second threshold value Vth2 and the third threshold value Vth3 are threshold values for determining that a light source module outside the specification is connected to the output end 60. The second threshold value Vth2 is set to the upper limit value of the detection voltage Vd when the light source module 11 adapted for the lighting device 12 is connected to the output end 60. The third threshold value Vth3 is set to the lower limit value of the detection voltage Vd in a state where the light source module 11 adapted for the lighting device 12 is connected to the output end 60.

  That is, the detection voltage Vd when a light source module outside the specification is connected to the output end 60 is in a range smaller than the first threshold Vth1 and greater than or equal to the second threshold Vth2, or smaller than the third threshold Vth3 and greater than or equal to the fourth threshold Vth4. It becomes the range. Here, a range that is smaller than the first threshold Vth1 and equal to or greater than the second threshold Vth2 and a range that is smaller than the third threshold Vth3 and equal to or greater than the fourth threshold Vth4 are defined as abnormal voltage ranges. In the present embodiment, the control device 40 notifies the user when the detected voltage Vd is within a predetermined abnormal voltage range.

  Further, the second threshold value Vth2 may be the maximum value of the detection voltage Vd when the lighting apparatus 100 performs normal lighting. The third threshold value Vth3 may be the minimum value of the detection voltage Vd when the lighting fixture 100 performs normal lighting. Here, the normal lighting indicates a state in which the control device 40 is turning on and off the switching element Q2 so that the LED current matches the target current determined based on the dimming command value.

  When the AC power supply 7 is supplied to the lighting device 12 and the lighting device 12 starts operating, the output voltage of the lighting device 12 increases. The output voltage of the lighting device 12 is stabilized as time passes. For this reason, as shown in FIG. 2, the detection voltage Vd of the voltage detection circuit 50 is also stabilized after increasing with the passage of time. At this time, the control device 40 performs control so that the output current from the output end 60 becomes constant. The control device 40 compares the detection voltage Vd of the voltage detection circuit 50 with the threshold values Vth1 to Vth4 in a state where a certain time has elapsed from the start of the operation of the lighting device 12 and the voltage applied to the output terminal 60 is stable. In accordance with the comparison result, the control device 40 controls the lighting of the light source 11a.

  Next, operation | movement of the lighting fixture 100 according to a comparison result is demonstrated. First, when the detection voltage Vd is equal to or higher than the first threshold value Vth1, it is determined that the output terminal 60 is in an open state. That is, it is determined that a load such as a straight tube lamp is not connected to the output end 60. In this case, the control device 40 stops the operation of the lighting device 12.

  Next, when the detection voltage Vd is smaller than the first threshold value Vth1 and equal to or higher than the second threshold value Vth2, it is determined that a light source module outside the specification is connected to the output end 60. The non-specification light source module is, for example, a lamp that does not include the lamp detection resistor 13 or a lamp in which the resistance value of the lamp detection resistor 13 is larger than a specified value. In this case, by the notification function, the control device 40 turns on and off the switching element Q2 so that the plurality of light sources 11a blinks for a certain time. Here, the fixed time is several seconds, for example.

  The control device 40 causes the light source 11a to blink when the detection voltage Vd is within a predetermined abnormal voltage range Vth2 to Vth1. Accordingly, it is possible to notify the user that a light source module outside the specification is connected to the output end 60 and to prompt the user to replace the lamp. Here, the user may be an operator.

  Next, when the detection voltage Vd is smaller than the second threshold value Vth2 and equal to or greater than the third threshold value Vth3, it is determined that the normal light source module 11 is connected to the output end 60. The normal light source module 11 is the light source module 11 adapted to the lighting device 12. Further, the normal light source module 11 may have a resistance value within the specification range of the lighting device 12. In this case, the control device 40 normally turns on the plurality of light sources 11a.

  Next, when the detection voltage Vd of the voltage detection circuit 50 is smaller than the third threshold value Vth3 and equal to or greater than the fourth threshold value Vth4, it is determined that a light source module outside the specification is connected to the output end 60. The non-specification light source module is, for example, a lamp in which some of the plurality of light sources 11a are thinned out or a lamp whose resistance value of the lamp detection resistor 13 is smaller than a specified value. In this case, with the notification function, the control device 40 turns on and off the switching element Q2 so that the plurality of light sources 11a blinks for a certain period of time. Here, the fixed time is several seconds, for example.

  The control device 40 blinks the light source 11a when the detection voltage Vd of the voltage detection circuit 50 is within a predetermined abnormal voltage range Vth4 to Vth3. Accordingly, it is possible to notify the user that a light source module outside the specification is connected to the output end 60 and to prompt the user to replace the lamp.

  Next, when the detection voltage Vd of the voltage detection circuit 50 is smaller than the fourth threshold value Vth4, it is determined that the output terminal 60 is short-circuited. In this case, the control device 40 stops the operation of the lighting device 12.

  FIG. 3 is a diagram showing an LED current waveform according to the first embodiment. In the present embodiment, when the detection voltage Vd is in the abnormal voltage range Vth4 to Vth3, Vth2 to Vth1, the light source 11a blinks by the notification function. Here, it is desirable that the control device 40 turns on the light source 11a at regular time intervals. Thereby, it can prevent that a user mistakenly recognizes blinking of the light source 11a by a notification function as a failure of the lighting device 12. Further, the control device 40 may periodically turn on the light source 11a by the notification function. Further, the control device 40 may control the LED current so as to repeatedly increase and decrease by the notification function.

  The blinking of the light source 11a by the notification function may be performed as in patterns 1 to 3 shown in FIG. In each of the patterns 1 to 3, the LED current is larger toward the upper side. In Pattern 1, the control device 40 keeps the light-off state for a certain period after blinking the light source 11a five times. In Pattern 2, the control device 40 keeps the light-off state for a certain period after blinking the light source 11a once. In pattern 3, the control device 40 repeats a state where the LED current is large and a state where the LED current is small at regular time intervals.

  As described above, in the present embodiment, the light source 11a blinks when a load that is not suitable for the lighting device 12 is connected to the output end 60. Thereby, the user can be informed of the state of the load. Therefore, it is possible to prompt the user to replace the load.

  In the present embodiment, the control device 40 determines the state of the load connected to the output terminal 60 using the detection voltage Vd of the voltage detection circuit 50. Here, the control device 40 may determine the state of the load connected to the output end 60 using another voltage. The voltage used by the control device 40 may be a voltage that changes according to the value of the load connected to the output end 60.

  In the present embodiment, four threshold values Vth1 to Vth4 are stored in the storage unit of the control device 40. On the other hand, the threshold value stored in the storage unit may be other than four as long as the upper limit value Vth3 of the abnormal voltage range Vth4 to Vth3 or the lower limit value Vth2 of the abnormal voltage range Vth2 to Vth1 is included. Further, the blinking pattern of the light source 11a may be different depending on whether the detection voltage Vd is in the abnormal voltage range Vth2 to Vth1 or in the abnormal voltage range Vth4 to Vth3.

  As a modification of the present embodiment, the notification unit may include a remote controller 20. In this case, the control device 40 causes the remote controller 20 to display a message when the detection voltage Vd of the voltage detection circuit 50 is in the abnormal voltage range Vth2 to Vth1, Vth4 to Vth3. The remote controller 20 includes a liquid crystal screen. The control device 40 transmits a display instruction signal to the liquid crystal screen to the remote controller 20 via the communication unit 111. As a result, a message is displayed on the liquid crystal screen of the remote controller 20. Therefore, the user is notified that the light source module outside the specification is connected to the output end 60. Further, the control device 40 may change the message displayed on the remote controller 20 in accordance with the detected voltage Vd.

  These modifications can be applied as appropriate to lighting devices and lighting fixtures according to the following embodiments. In addition, since there are many common points with Embodiment 1 about the lighting device and lighting fixture which concern on the following embodiment, it demonstrates centering around difference with Embodiment 1. FIG.

Embodiment 2. FIG.
FIG. 4 is a circuit block diagram of the lighting apparatus 200 according to Embodiment 2. In the first embodiment, when a straight tube lamp not suitable for the lighting device 12 is connected, the plurality of light sources 11a are blinked. Thereby, the control apparatus 40 alert | reported to the user that the straight tube lamp which is not suitable for the lighting device 12 was connected. In the first embodiment, a message is displayed on the liquid crystal screen of the remote controller 20 to notify the user that a straight tube lamp that is not adapted to the lighting device 12 is connected.

  In the present embodiment, the lighting fixture 200 includes a buzzer 201. The buzzer 201 is connected to the control device 40. Other structures are the same as those of the lighting apparatus 100. The notification unit according to the present embodiment includes a buzzer 201. When the light source module not adapted to the lighting device 212 is connected to the output end 60, the buzzer 201 may be sounded.

  Similar to the first embodiment, four threshold values Vth1 to Vth4 are stored in the storage unit of the control device 40 in advance. The values of the first to fourth threshold values Vth1 to Vth4 are the same as those in the first embodiment. As in the first embodiment, when a certain time has elapsed from the start of the operation of the lighting device 212 and the voltage applied to the output terminal 60 is stable, the control device 40 detects the detection voltage Vd of the voltage detection circuit 50 and the threshold value. Vth1 to 4 are compared. The control device 40 sounds the buzzer 201 according to the comparison result.

  Next, operation | movement of the lighting fixture 200 according to a comparison result is demonstrated. The operation when the detection voltage Vd is equal to or higher than the first threshold value Vth1 is the same as that in the first embodiment. Next, when the detection voltage Vd is smaller than the first threshold value Vth1 and equal to or higher than the second threshold value Vth2, it is determined that a light source module outside the specification is connected to the output end 60. In this case, the control device 40 sounds the buzzer 201 for a certain time by the notification function.

  The control device 40 sounds the buzzer 201 when the detection voltage Vd of the voltage detection circuit 50 is within a predetermined abnormal voltage range Vth2 to Vth1. Accordingly, it is possible to notify the user that a light source module outside the specification is connected to the output end 60. Therefore, it is possible to prompt the user to replace the lamp.

  The operation in the case where the detection voltage Vd is smaller than the second threshold value Vth2 and not less than the third threshold value Vth3 is the same as that in the first embodiment. Next, when the detection voltage Vd of the voltage detection circuit 50 is smaller than the third threshold value Vth3 and equal to or greater than the fourth threshold value Vth4, it is determined that a light source module outside the specification is connected to the output end 60. In this case, the control device 40 sounds the buzzer 201 for a certain time by the notification function.

  The control device 40 sounds the buzzer 201 when the detection voltage Vd is within a predetermined abnormal voltage range Vth4 to Vth3. Accordingly, it is possible to notify the user that a light source module outside the specification is connected to the output end 60. Therefore, it is possible to prompt the user to replace the lamp. The operation when the detection voltage Vd is smaller than the fourth threshold value Vth4 is the same as that in the first embodiment.

  According to the present embodiment, the buzzer 201 is sounded when a straight tube lamp that is not adapted to the lighting device 12 is connected. Thereby, when the load which is not adapted to the lighting device 12 is connected, it is possible to prompt the user to replace the lamp with a correct one.

  In the present embodiment, the lighting device 212 includes a buzzer 201. On the other hand, the buzzer 201 may be provided outside the lighting device 212. The technical features described in each embodiment may be used in appropriate combination.

100, 200 luminaire, 12, 212 lighting device, 11a light source, 11 light source module, 60 output end, 50 voltage detection circuit, 40 control device, Vth1 first threshold, Vth2 second threshold, Vth3 third threshold, Vth4 fourth Threshold, 201 buzzer, 20 remote control

Claims (14)

A voltage detection circuit that detects a voltage that changes according to the value of a load connected to the output terminal;
A control device for controlling lighting of the light source and notifying a user when the detection voltage of the voltage detection circuit is within a predetermined abnormal voltage range;
A lighting device comprising: The control device performs control so that the output current from the output terminal becomes constant,
The lighting device according to claim 1, wherein the voltage detection circuit detects a voltage applied to the output terminal. The control device includes a storage unit in which a threshold value including an upper limit value or a lower limit value of the abnormal voltage range is stored,
The lighting device according to claim 1, wherein the control device compares the detection voltage with the threshold value. The threshold value includes a first threshold value, a second threshold value smaller than the first threshold value, a third threshold value smaller than the second threshold value, and a fourth threshold value smaller than the third threshold value,
The range of the abnormal voltage includes a range smaller than the first threshold and greater than or equal to the second threshold, and a range smaller than the third threshold and greater than or equal to the fourth threshold. The lighting device described.   The lighting device according to claim 4, wherein the control device stops the operation of the lighting device when the detected voltage is equal to or higher than the first threshold value or smaller than the fourth threshold value.   6. The lighting device according to claim 4, wherein the detected voltage when a light source module out of specification is connected to the output end is in a range of the abnormal voltage. 7. When the output terminal is in an open state, the detection voltage is not less than the first threshold value,
The lighting device according to claim 4, wherein, when the output terminal is short-circuited, the detection voltage is smaller than the fourth threshold value. With a notification unit,
8. The lighting device according to claim 1, wherein, when the detected voltage is in the range of the abnormal voltage, the control device notifies the user by controlling the notification unit. 9. . The notification unit includes the light source,
The lighting device according to claim 8, wherein the control device blinks the light source when the detected voltage is in the range of the abnormal voltage.   The lighting device according to claim 9, wherein the control device turns on the light source at a constant time interval when the detected voltage is in the range of the abnormal voltage. The notification unit includes a buzzer,
The lighting device according to any one of claims 8 to 10, wherein the control device sounds the buzzer when the detected voltage is in the range of the abnormal voltage. The notification unit includes a remote control,
The lighting device according to any one of claims 8 to 11, wherein the control device displays a message on the remote controller when the detected voltage is in the range of the abnormal voltage.   The lighting device according to claim 12, wherein the control device changes the message according to the detected voltage. The lighting device according to any one of claims 1 to 13,
The light source;
A lighting apparatus comprising:

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