JP2006066347A - Discharge lamp lighting device and illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device and an illumination device that can reduce cost when changing the types of discharge lamps used. <P>SOLUTION: The discharge lamp lighting device is equipped with a light control ballast 6 for supplying power for lighting to a discharge lamp FL, an illuminance compensation part 5 for processing a power supply movement according to the types of discharge lamps FL to the light control ballast 6 by outputting a light control signal to indicate an amount of power supply to the discharge lamp FL, and a connector 7 for connecting the illuminance compensation part 5 and the light control ballast 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a discharge lamp lighting device for lighting a discharge lamp, and an illumination device.

  As shown in FIG. 21, the level of light output emitted from a discharge lamp that is generally used for illumination is high immediately after the start of use of the discharge lamp, and then gradually decreases as the lighting time accumulates. Are known. In other words, the light output of the discharge lamp decreases with the passage of time of use of the discharge lamp. As a technique for suppressing a decrease in light output with the passage of time of use of this discharge lamp, a technique called initial illuminance correction is known (see, for example, Patent Document 1), and actually provided with an initial illuminance correction function. Discharge lamp lighting devices are commercially available. As shown in FIG. 22, in the initial stage of lighting of the discharge lamp, lighting is performed with a dimming ratio kept low in order to suppress excessive light output, and the dimming ratio is gradually increased as the lighting time accumulates. Thus, as shown in FIG. 23, an illumination device is provided that can obtain substantially the same light output regardless of the elapsed time of use of the discharge lamp. In addition, since excessive light output of the discharge lamp is suppressed at the beginning of lighting, power consumption can be reduced.

  FIG. 24 is a block diagram showing an example of the configuration of the discharge lamp lighting device 101 having such an initial illuminance correction function. A discharge lamp lighting device 101 shown in FIG. 24 includes an energization detection unit 102, a dimming ballast 103, a lighting time timer 104, and an illuminance correction circuit 105. The energization detection unit 102 is provided indoors, for example. It is connected to a commercial AC power supply via a switch SW1 which is a wall switch. A discharge lamp FL is connected to the dimming ballast 103.

  When the switch SW1 is turned on by the user and the power supply voltage Vac is supplied to the energization detecting unit 102, the power supply voltage Vac is supplied to the dimming ballast 103 by the energization detecting unit 102 and the energized state is established. An energization detection signal indicating this is output to the lighting time timer 104. Then, while the discharge lamp FL is lit by the dimming ballast 103, the period during which the energization detection signal indicating that the energization state is established is received by the lighting time timer 104 is cumulatively counted as the accumulated lighting time. The Thereby, the cumulative lighting time of the discharge lamp lighting device 101 is counted by the lighting time timer 104 as the usage time of the discharge lamp FL.

  As shown in FIG. 21, the light output of the discharge lamp FL decreases with time as shown in FIG. 21, and is caused by dirt such as a reflector of the lamp mounted with the discharge lamp FL or a shade. The amount of light also decreases. As a cause of the decrease in the light output of the discharge lamp FL, for example, in the case of a fluorescent lamp, the deterioration of the phosphor may be considered.

Therefore, the illuminance correction circuit 105 performs dimming by reducing the dimming ratio of the discharge lamp FL immediately after the replacement of the discharge lamp FL, that is, while the discharge lamp FL is new, based on the accumulated lighting time counted by the lighting time timer 104. Control to increase the dimming ratio of the dimming ballast 103 so that the discharge lamp FL approaches full lighting (rated lighting state) as the cumulative lighting time by the lighting time timer 104 increases. I do. As a result, the light output of the discharge lamp FL decreases as the cumulative lighting time increases, but by increasing the power supplied to the discharge lamp FL, the light output of the discharge lamp FL It is made to be substantially constant regardless of the accumulated usage time.
Japanese Patent Laid-Open No. 2001-15276

  By the way, the light output reduction characteristic, which is a method of reducing the light output in the discharge lamp FL accompanying the increase in the cumulative lighting time as shown in FIG. 21, differs depending on the type of the discharge lamp FL. Therefore, the illuminance correction circuit 105 is configured to correct a decrease in light output in a predetermined type of the discharge lamp FL. In order to replace the discharge lamp FL with a different type, the illuminance correction circuit 105 is used. It is necessary to replace 105 with one corresponding to the light output reduction characteristic of the discharge lamp FL. On the other hand, the discharge lamp lighting device 101 is housed in a substantially box-shaped housing as shown in FIG. 25, or the energization detection unit 102, the dimming ballast 103, the lighting time timer 104, and the illuminance correction. Since the circuit 105 and the circuit 105 are configured on a single substrate, the illuminance correction circuit 105 alone cannot be replaced. When the user replaces the discharge lamp FL with a different type, the discharge lamp is turned on. The apparatus 101 must be replaced with one corresponding to the light output reduction characteristic of the discharge lamp FL, and there is a disadvantage that the cost burden increases.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a discharge lamp lighting device and a lighting fixture that can reduce the cost when changing the type of discharge lamp to be used. And

  In order to achieve the above object, a discharge lamp lighting device according to the first means of the present invention includes a socket for mounting a discharge lamp, and a lighting drive for supplying lighting power to the discharge lamp via the socket. A power receiving unit that receives a power supply voltage supplied from the outside and supplies to the lighting driving unit, and outputs a dimming signal for instructing an amount of power supplied to the discharge lamp to the lighting driving unit A discharge lamp lighting device including a control unit that performs a power supply operation according to the type of the discharge lamp, and includes a connection unit that connects the control unit and the lighting driving unit.

  Further, in the above discharge lamp lighting device, the control unit counts the lighting time of the discharge lamp cumulatively as the cumulative lighting time, and according to the cumulative lighting time measured by the time counting unit, And an illuminance correction unit that outputs a dimming signal.

  In the above-described discharge lamp lighting device, the control unit stores a correction table that associates the cumulative lighting time and the dimming ratio for correcting the light output in a predetermined type of discharge lamp. And the illuminance correction unit is configured to adjust the dimming ratio so as to obtain a dimming ratio associated with the accumulated lighting time measured by the time measuring unit by the correction table stored in the table storage unit. It is characterized by outputting a signal.

  The discharge lamp lighting device further includes a type receiving unit that receives input of type information indicating the type of the discharge lamp, and the table storage unit stores a plurality of correction tables for a plurality of types of discharge lamps. The illuminance correction unit outputs the dimming signal based on the correction table corresponding to the type of the discharge lamp indicated by the type information received by the type reception unit. .

  In the above-described discharge lamp lighting device, the control unit further includes a first current detection unit that detects a current supplied from the power reception unit to the lighting drive unit, and the table storage unit includes a plurality of types of the table storage unit. A plurality of correction tables are stored for each discharge lamp, and the illuminance correction unit is attached to the socket based on a detected current value detected by the first current detection unit when the discharge lamp is turned on. The type of the discharge lamp is determined, and the dimming signal is output based on a correction table for the determined type of the discharge lamp stored in the table storage unit.

  Furthermore, in the above-described discharge lamp lighting device, the control unit further includes a second current detection unit that detects a current supplied from the power reception unit to the lighting drive unit, and the timing unit includes the second current detection unit. The period of time during which the detected current value detected by the current detection unit is equal to or greater than the first current value, which is the detected current value when the discharge lamp is lit, is cumulatively counted as the cumulative lighting time. It is said.

  Further, in the above-described discharge lamp lighting device, the lighting drive unit repeats start and stop of power supply to the discharge lamp when the filament in the discharge lamp is abnormal, and the time counting unit is configured to receive the power receiving unit. While the power supply voltage is continuously received by the unit, the detected current value detected by the second current detection unit is a current value smaller than the detected current value when the discharge lamp is turned on. The current accumulated lighting time is set to zero when the current value rises and falls by a predetermined number of times set in advance.

  The timing unit further includes a detection current value detected by the second current detection unit after the power reception unit starts receiving the power supply voltage, and a detected current value when the discharge lamp is turned on. When the first event, which is a case where the second current value, which is a smaller current value, is continuously generated for a predetermined number of times, the counted cumulative lighting time is set to zero. It is characterized by that.

  Further, in the above-described discharge lamp lighting device, the time counting unit is configured to measure the accumulated lighting when the first event occurs a predetermined number of times within a predetermined monitoring time set in advance. It is characterized by zero time.

  Further, in the above-described discharge lamp lighting device, the illuminance correction unit is configured such that the detected current value detected by the second current detection unit is the value of the discharge lamp after the accumulated lighting time is zeroed by the time measuring unit. When the period of time equal to or greater than the first current value, which is the detected current value at the time of lighting, continues beyond a predetermined time set in advance, the dimming signal is output to the lighting driving unit. The power supply operation according to the kind of electric light is performed.

  The discharge lamp lighting device further includes a dimming ratio receiving unit that receives an input of a dimming ratio of the discharge lamp, and the illuminance correction unit further includes a dimming received by the dimming ratio receiving unit. The correction table stored in the table storage unit is corrected according to the ratio.

  Furthermore, the illumination device according to the second means of the present invention comprises a discharge lamp lighting device for lighting a discharge lamp, and a housing that houses the discharge lamp lighting device, wherein the discharge lamp lighting device comprises: It is the discharge lamp lighting device described above.

  The discharge lamp lighting device and the lighting device having such a configuration output a dimming signal to the lighting drive unit for the discharge lamp attached to the socket to perform a power supply operation according to the type of the discharge lamp. Since the control unit is connected to the lighting drive unit via the connection unit, when changing the type of the discharge lamp to be used, the control unit is disconnected from the lighting drive unit at the connection unit to obtain a new type of discharge lamp. Since it is possible to replace the control unit with a corresponding one and there is no need to replace the lighting drive unit, it is possible to reduce the cost when changing the type of the discharge lamp to be used.

  Embodiments according to the present invention will be described below with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted.

(First embodiment)
FIG. 1 is a perspective view showing an example of the appearance of a lighting device according to an embodiment of the present invention. The illuminating device 1 shown in FIG. 1 includes a discharge lamp lighting device 2, a casing 3 that houses the discharge lamp lighting device 2, and a socket 4 for connecting the discharge lamp FL to the discharge lamp lighting device 2. . FIG. 2 is a perspective view showing an example of the appearance of a discharge lamp lighting device according to an embodiment of the present invention. The discharge lamp lighting device 2 shown in FIG. 2 includes an illuminance correction unit 5 that is an example of a control unit, a dimming ballast 6 that is an example of a lighting drive unit, cables CB1 and CB2 that are examples of a connection unit, And a connector 7 for connecting the cables CB1 and CB2 to the illuminance correction unit 5. The illuminance correction unit 5 and the dimming ballast 6 are housed in a substantially box-shaped housing, and the cables CB1 and CB2 and the connector 7 are provided between the illuminance correction unit 5 and the dimming ballast 6. Connected by. Thereby, it is easy to separate and replace only the illuminance correction unit 5 from the dimming ballast 6 by the connector 7.

  For example, a commercial AC power supply is connected to the illuminance correction unit 5, and the power supply voltage Vac is supplied to the dimming ballast 6 via the illuminance correction unit 5, the connector 7, and the cable CB <b> 1. The dimming signal CTL output from the illuminance correction unit 5 is supplied to the dimming ballast 6 via the connector 7 and the cable CB2.

  FIG. 3 is a block diagram showing an example of the configuration of the discharge lamp lighting device 2 according to the first embodiment of the present invention. The discharge lamp lighting device 2 shown in FIG. 3 includes an illuminance correction unit 5, a dimming ballast 6, and a connector 7. The illuminance correction unit 5 is a terminal block 51 that is an example of a power reception unit, and a current detection unit that is an example of a second current detection unit that detects a current supplied from the terminal block 51 to the dimming ballast 6. 52, for example, a control circuit unit 53 that is an example of an illuminance correction unit configured using a CPU (Central Processing Unit), a control power supply circuit unit 54 that supplies the operation power supply voltage Vdc to the control circuit unit 53, and the like. A time counter 55 that is an example of a time measuring unit, a dimming signal generation unit 56, and a nonvolatile memory 57 that is an example of a table storage unit configured using, for example, an EEPROM (Electrically Erasable and Programmable Read Only Memory). I have.

  A commercial power source is connected to the terminal block 51 via, for example, a switch SW1, which is a wall switch provided indoors. The power supply voltage Vac received by the terminal block 51 is supplied from the current detection unit 52, the connector 7, and the cable. It is supplied to the dimming ballast 6 via CB1. The current detection unit 52 detects a current supplied from the terminal block 51 to the dimming ballast 6 and outputs a detection voltage Vd representing the detected current value to the control circuit unit 53. The time counter 55 is a timer circuit for measuring the cumulative lighting time of the discharge lamp FL. The non-volatile memory 57 stores a correction table 571 in which the accumulated lighting time and the light output dimming ratio are associated with each other for correcting the light output reduction characteristic of the discharge lamp FL connected to the socket 4. . The dimming signal generation unit 56 is a signal driving circuit that outputs the dimming signal CTL to the dimming ballast 6 in accordance with the control signal from the control circuit unit 53.

  The control circuit unit 53 sends the dimming signal CTL from the dimming signal generation unit 56 based on the cumulative lighting time of the discharge lamp FL measured by the time counter 55 and the correction table 571 stored in the nonvolatile memory 57. The light is output to the dimming ballast 6 via the connector 7 and the cable CB2.

  The dimming ballast 6 includes, for example, an inverter circuit, a resonance circuit, and the like, and supplies lighting power to the discharge lamp FL to light it. The dimming ballast 6 emits light according to the dimming signal CTL received from the illuminance correction unit 5. It has a dimming function that changes the amount of power supplied to the electric lamp FL and changes the light output of the discharge lamp FL. The dimming ballast 6 includes a no-load detection circuit that detects a no-load state. When the no-load detection circuit detects that the discharge lamp FL has been removed from the socket 4 and is in a no-load state, In order to reduce the voltage stress applied to the electronic components of the dimming ballast 6 and reduce unnecessary power consumption, the dimming stability of the inverter circuit, etc., excluding the oscillation control circuit that controls the operation of the dimming ballast 6 The circuit operation in the vessel 6 is stopped (this state is called a standby state). In the standby state, only the oscillation control circuit is operating in the dimming ballast 6, so that the current consumed by the dimming ballast 6, that is, supplied from the terminal block 51 to the dimming ballast 6. The input current Iin is an extremely small value compared to that during normal lighting operation.

  FIG. 4 is a circuit diagram showing an example of a detailed configuration of the illuminance correction unit 5 in the discharge lamp lighting device 2 shown in FIG. 4 includes a transformer L1 in which a primary winding N1 is interposed between a terminal block 51 and a dimming ballast 6, and one end of the secondary winding N2 in the transformer L1 is grounded. The other end is connected to the ground via a rectifying diode D1 and resistors R1 and R2. In addition, a capacitor C1 is connected in parallel with the resistor R2, and a connection point between the resistors R1 and R2 is connected to the control circuit unit 53. As a result, the current flowing through the primary winding N1, that is, the current proportional to the input current Iin supplied from the terminal block 51 to the dimming ballast 6 is half-wave rectified by the diode D1, and the series circuit of the resistors R1 and R2 The voltage is divided, the voltage across the resistor R2 is smoothed by the capacitor C1, and is output to the control circuit unit 53 as the detection voltage Vd.

  The control power supply circuit unit 54 rectifies the power supply voltage Vac received by the terminal block 51, the capacitor C2 that smoothes the voltage rectified by the diode bridge DB to a DC voltage of, for example, 10V, and the smoothing The control circuit unit 53, the time counter 55, and a series circuit of resistors R3 and R4 for supplying an operating power supply voltage Vdc of, for example, 5V to the nonvolatile memory 57 are provided.

  The dimming signal generation unit 56 converts the signal level of the control signal output from the control circuit unit 53 to 10 V and outputs the signal level to the dimming ballast 6. For example, the base of the transistor Q1 is connected via the resistor R5. Is connected to the control circuit unit 53, the high voltage side of the capacitor C2 is connected to the collector of the NPN transistor Q1, and the emitter of the transistor Q1 is connected to the ground via the resistor R6. Then, the transistor Q1 is turned on / off in accordance with the control signal output from the control circuit unit 53, whereby the voltage at the connection point between the emitter of the transistor Q1 and the resistor R6 is used as the dimming signal CTL. 6 is output.

  As the dimming signal CTL, for example, a rectangular wave generated when the transistor Q1 is turned on / off is used. For example, the dimming ratio by the dimming ballast 6 depends on the on-duty width of the dimming signal CTL. To be controlled.

  Next, the operation of the discharge lamp lighting device 2 configured as described above will be described. FIG. 5 is an explanatory diagram for explaining an operation at the start of lighting of the discharge lamp FL by the discharge lamp lighting device 2. First, when the switch SW1 is turned on and the power supply voltage Vac received by the terminal block 51 is supplied to the dimming ballast 6 via the current detection unit 52 and the connector 7, the dimming ballast 6 releases the power. After a filament (not shown) included in the electric lamp FL is preheated, a starting voltage for starting electric discharge is applied from the dimming ballast 6 to the discharge lamp FL, and the discharge lamp FL is turned on.

  In a series of lighting start sequences including preheating, starting, and lighting, as shown in the upper part of FIG. 5, as the state changes from preheating of the filament, starting of discharge, and lighting of the discharge lamp FL, adjustment from the terminal block 51 is performed. The input current Iin supplied to the light ballast 6 increases, and the detection voltage Vd output from the current detection unit 52 to the control circuit unit 53 also increases. When the control circuit unit 53 detects that the detected voltage Vd is equal to or higher than a preset reference voltage Vref1, it is determined that the discharge lamp FL is turned on. A state in which the discharge lamp FL is determined to have been turned on by the control circuit unit 53 is represented by Hi in the lower graph of FIG.

  As the reference voltage Vref1, the discharge lamp FL is connected to the dimming ballast 6 so that the lighting operation can be detected when the lighting operation of the discharge lamp FL is started, for example, when a preheating current of the filament flows. A detection voltage Vd corresponding to a current value (second current value) between the input current Iin flowing in a no-load state and the input current Iin when the filament preheating current flows is set.

  For example, the current detection unit 52 includes a comparator that compares the detection voltage Vd and the reference voltage Vref1, and when the detection voltage Vd exceeds the reference voltage Vref1, the output signal of the comparator is output to the control circuit unit 53 at a high level. Thus, the control circuit unit 53 may determine that the discharge lamp FL has been turned on.

  FIG. 6 is a flowchart showing an example of the operation of the discharge lamp lighting device 2. First, the switch SW1 is turned on by the user, the power supply voltage Vac received by the terminal block 51 is supplied to the dimming ballast 6 through the current detection unit 52 and the connector 7, and the power supply voltage Vac is supplied to the control power supply circuit unit. The operation power supply voltage Vdc is supplied from the control power supply circuit section 54 to the control circuit section 53, the time counter 55, and the nonvolatile memory 57, and the control circuit section 53 starts operating.

  Then, an initial setting process of the time counter 55 is first performed by the control circuit unit 53 (step S1), and as shown in FIG. 5, the input current Iin increases and the detection voltage Vd output from the current detection unit 52 is used as a reference. When the voltage Vref1 is exceeded, it is determined by the control circuit unit 53 that the discharge lamp FL has started lighting (not no load) (NO in step S2), and the cumulative lighting time stored in the nonvolatile memory 57 is the time counter 55. (Step S3). The accumulated lighting time is the value stored in the nonvolatile memory 57 as the accumulated lighting time immediately before the power is turned off last time.

  Next, the control circuit unit 53 obtains a predetermined light output from the discharge lamp FL based on the cumulative lighting time set in the time counter 55 and the correction table 571 stored in the nonvolatile memory 57. A dimming ratio is determined (step S4). FIG. 7 is an explanatory diagram illustrating an example of the correction table 571 stored in the non-volatile memory 57. As shown in FIG. 7, the correction table 571 is a table in which the cumulative lighting time of the discharge lamp FL is associated with the dimming ratio for correction, and the dimming ratio increases as the cumulative lighting time increases, that is, the discharge lamp FL. Is set to increase the power supply to. When the types of the discharge lamps FL are different, the shape of the graph of the correction table 571 shown in FIG. 7 is different.

  Then, in response to the control signal from the control circuit unit 53, the dimming signal CTL corresponding to the determined dimming ratio is output from the dimming signal generation unit 56 to the dimming ballast 6 (step S5). The dimming ballast 6 supplies power corresponding to the dimming signal CTL to the discharge lamp FL.

  Further, when the detection voltage Vd output from the current detection unit 52 exceeds the reference voltage Vref1, a predetermined time set in advance, for example, a time when it can be determined that the discharge lamp FL has started to light normally has elapsed. The counter 55 starts measuring the cumulative lighting time (step S6). Then, at every predetermined time interval, for example, every time interval that does not cause a large error in the accumulated lighting time even if the switch SW1 is turned off and the accumulated lighting time during the time measurement by the time counter 55 is initialized. 53, the accumulated lighting time counted by the time counter 55 is read out and stored in the nonvolatile memory 57 as a new accumulated lighting time (step S7).

  Thereafter, by repeating the processes of steps S2 to S7, the dimming control based on the accumulated lighting time and the correction table 571 according to the accumulated lighting time and the light output reduction characteristic for each type of the discharge lamp FL is performed. It is repeated and the light output of the discharge lamp FL is maintained substantially constant regardless of the cumulative lighting time of the discharge lamp FL.

  Further, since the illuminance correction unit 5 and the dimming ballast 6 are connected by the cables CB1 and CB2 and the connector 7, when changing the type of the discharge lamp FL to be used, only the illuminance correction unit 5 is used. A different type of discharge lamp FL is used by disconnecting from the dimming ballast 6 by the connector 7 and replacing it with an illuminance correction unit 5 having a correction table 571 corresponding to the light output reduction characteristics of the discharge lamp FL to be changed. Thus, when the type of the discharge lamp to be used is changed, like the discharge lamp lighting device 101 according to the background art shown in FIGS. 24 and 25, the entire discharge lamp lighting device 101 is replaced. This is unnecessary, and the cost for changing the type of discharge lamp to be used can be reduced.

  Next, when the discharge lamp FL is removed from the socket 4, as shown in FIG. 8, the dimming ballast 6 is in a standby state, the input current Iin becomes extremely small, and the detection voltage Vd of the current detector 52 is reduced. Below reference voltage Vref1. Then, the control circuit unit 53 determines that there is no load (YES in step S <b> 2), and stops counting the cumulative lighting time by the time counter 55 and updating the cumulative lighting time stored in the nonvolatile memory 57.

  Thereby, in the no-load state, even when the discharge lamp FL is not lit, erroneously counting the cumulative lighting time is suppressed, and for example, as in the discharge lamp lighting device 101 according to the background art shown in FIG. Compared to the case where the energization time during which the power supply voltage Vac is supplied to the discharge lamp lighting device 101 is counted as the cumulative lighting time, the accuracy of counting the time during which the discharge lamp FL is lit can be improved. Therefore, it is possible to improve the accuracy of the dimming control that maintains the light output substantially constant regardless of the lighting time of the discharge lamp FL.

  Further, after the discharge lamp FL is connected to the socket 4, the no-load state is not detected by the no-load detection circuit of the dimming ballast 6, so the standby state is released, and the dimming ballast 6 cancels the standby state. Since the lighting start operation similar to that when the power is turned on is performed, the input current Iin increases again, and the detection voltage Vd output from the current detection unit 52 exceeds the reference voltage Vref1, so that the control circuit unit 53 causes the discharge lamp to It is determined that the FL has started lighting (not no load) (NO in step S2), and the processing of steps S2 to S7 is repeated again, thereby measuring the cumulative lighting time and dimming control according to the cumulative lighting time. And the light output of the discharge lamp FL is maintained substantially constant regardless of the cumulative lighting time of the discharge lamp FL.

  Accordingly, the presence or absence of the discharge lamp FL is detected by the control circuit unit 53, and the accumulated lighting time is measured only when the discharge lamp FL is connected to the socket 4. Therefore, regardless of the elapsed lighting time of the discharge lamp FL. It is possible to improve the accuracy of dimming control that maintains the light output substantially constant.

  In the present embodiment, the current detection unit 52 detects the input current Iin supplied to the dimming ballast 6 and outputs the detection voltage Vd. However, as shown in FIG. 52 may be configured to detect the sum of the input current Iin supplied to the dimming ballast 6 and the current supplied to the control power supply circuit unit 54 and output the detection voltage Vd.

  Further, like the discharge lamp lighting device 101 shown in FIG. 24, the time counter 55 may be configured to count the energization time during which the power supply voltage Vac is supplied to the discharge lamp lighting device 2 as the cumulative lighting time.

  Next, when the filament is abnormal in the discharge lamp FL that has been lit, for example, when the discharge lamp FL reaches the end of its life, there is no need to continue to measure the cumulative lighting time. Therefore, the cumulative lighting time stored in the non-volatile memory 57 and the cumulative lighting time during the time measurement are set to zero by the time counter 55 as follows.

  FIG. 10 is an explanatory diagram showing an example of the operation of the discharge lamp lighting device 2 when the discharge lamp FL reaches the end of its life. If the lighting start sequence is executed by the dimming ballast 6 when the discharge lamp FL reaches the end of its life, the voltage applied to the discharge lamp FL when attempting to shift from starting to lighting is higher than normal. Since it becomes higher, the lighting start sequence is stopped by the protective operation of the dimming ballast 6. Then, the input current Iin decreases, the detection voltage Vd decreases, the dimming ballast 6 enters a standby state, the input current Iin becomes minute, and the detection voltage Vd of the current detection unit 52 falls below the reference voltage Vref1.

  For example, when a light control ballast manufactured by Matsushita Electric Works Co., Ltd. (EX32HF11 / 24HK-1EXH) or the like is used as the light control ballast 6, the lighting start sequence is repeated a predetermined number of times, for example, three times to the discharge lamp FL. After repeating the start and stop of power supply, the oscillation is stopped. At this time, as shown in FIG. 10, at the end of the life in the lighting state of the discharge lamp FL, the dimming ballast 6 is in a standby state and the input current Iin becomes minute, and then the lighting start sequence is performed three times. As a result of repetition, the input current Iin increases and decreases three times, and after the detection voltage Vd detected by the current detection unit 52 repeats up and down three times with respect to the reference voltage Vref1, the detection voltage Vd becomes the reference voltage Vref1. Is maintained at a lower voltage.

  Therefore, the power detection of the power supply voltage Vac by the terminal block 51 is continuing, and therefore, while the supply of the operation power supply voltage Vdc from the control power supply circuit section 54 to the control circuit section 53 is continued, the current detection section 52 When the detected voltage Vd detected is repeated up and down a predetermined number of times, for example, three times with respect to the reference voltage Vref1, the control circuit unit 53 determines that the discharge lamp FL has reached the end of its life, and the nonvolatile memory The accumulated lighting time stored in 57 and the accumulated lighting time in the middle of timing are automatically set to zero by the time counter 55.

  Thereby, the cumulative lighting time can be automatically initialized at the end of the life of the discharge lamp FL.

  Also, it is necessary to initialize the cumulative lighting time when the user replaces the discharge lamp FL with a new one before reaching the end of the life. Therefore, when the user replaces the discharge lamp FL, the switch SW1 is turned off and on a predetermined number of times, for example, three times to stop and start the power supply to the discharge lamp lighting device 2, thereby forcing the nonvolatile memory 57 into the nonvolatile memory 57. The stored cumulative lighting time is set to zero.

  Specifically, as shown in FIG. 11, when the user removes the discharge lamp FL from the socket 4 in order to replace the discharge lamp FL, a no-load state is detected by the dimming ballast 6, and the dimming stability The device 6 shifts to the standby state, and the detection voltage Vd falls below the reference voltage Vref1. When the user turns off the switch SW1, the power supply voltage Vac is not supplied to the terminal block 51. Therefore, the detection voltage Vd becomes zero and the operation power supply voltage Vdc supplied from the control power supply circuit section 54 to the control circuit section 53. Will also be zero.

  Next, when the user turns on the switch SW1, the power supply voltage Vac is received by the terminal block 51 and supplied to the dimming ballast 6 and the control power supply circuit unit 54. At this time, since the discharge lamp FL is disconnected, the dimming ballast 6 detects a no-load state and shifts to a standby state, and the detection voltage Vd falls below the reference voltage Vref1, while the control power supply circuit unit 54 controls the discharge lamp FL. The power supply voltage Vdc for operation is supplied to the circuit unit 53, and the control circuit unit 53 starts operation. Then, the control circuit unit 53 detects the first event (symbol P1) in which the detection voltage Vd immediately after the control circuit unit 53 starts operation is lower than the reference voltage Vref1, and the first event is detected. Is counted and stored in the nonvolatile memory 57.

  As described above, when the user repeatedly turns off and on the switch SW1 three times with the discharge lamp FL removed from the socket 4, the control circuit unit 53 causes the control circuit 53 to perform the control circuit 53 at reference numerals P1, P2, and P3 in FIG. A first event in which the detected voltage Vd immediately after the start of the operation of the unit 53 is lower than the reference voltage Vref1 is detected, and the number of occurrences of the first event counted by the control circuit unit 53 is a predetermined number of times, for example 3 When the number of times is reached, the cumulative lighting time stored in the nonvolatile memory 57 is set to zero by the control circuit unit 53.

  Thereby, the accumulated lighting time can be initialized based on the user's predetermined power-off / on operation at the time of replacement of the discharge lamp FL.

  The accumulated lighting time is initialized when the user power-off / on operation at the time of replacement of the discharge lamp FL is performed a predetermined number of times, for example, three times within a predetermined time, for example, 3 seconds. It is good also as a structure to be.

  FIG. 12 is an explanatory diagram for explaining an example of the operation for initializing the cumulative lighting time. For example, when the user removes the discharge lamp FL from the socket 4 to replace the discharge lamp FL, the dimming ballast 6 shifts to a standby state, and the detection voltage Vd falls below the reference voltage Vref1. When the user turns off the switch SW1, the detection voltage Vd becomes zero and the operation power supply voltage Vdc becomes zero. Next, when the user turns on the switch SW1, the power supply voltage Vac is supplied to the dimming ballast 6 and the control power supply circuit unit 54. At this time, since the discharge lamp FL is disconnected, the dimming ballast 6 shifts to a standby state and the detection voltage Vd falls below the reference voltage Vref1, while the control circuit unit 53 starts operating and immediately after the operation starts. A first event (symbol P1) in which the detection voltage Vd is lower than the reference voltage Vref1 is detected, the number of occurrences of the first event is counted, stored in the nonvolatile memory 57, and not shown. The timer circuit starts counting the power-on time. This timer circuit is driven by a battery, for example, and is operable even when the operation power supply voltage Vdc is 0V.

  Then, if the power is turned off before reaching a predetermined monitoring time Ton, for example, 1 second, which is timed by the timer circuit, the timer circuit then sets the power off time by the timer circuit. Timing starts. Then, if the power is turned on (symbol P2) before the timer circuit reaches a predetermined monitoring time Toff set in advance, for example, 1 second, the power-on time is counted again from that point and monitored. If the power is turned off before the time Ton is reached, the power off time is counted again from that point, and if the power is turned on (reference P3) before the monitoring time Toff is reached, the first event at this time is reached. Since the number of occurrences is 3, the control circuit unit 53 sets the accumulated lighting time stored in the nonvolatile memory 57 by the control circuit unit 53 to zero.

  On the other hand, in the initialization operation of the cumulative lighting time shown in FIG. 12, the power-on time regardless of what time the power-on time and power-off time are measured by the timer circuit. When the measured time value reaches the monitoring time Ton or the power-off time reaches the monitoring time Toff, the initialization operation of the cumulative lighting time is canceled by the control circuit unit 53 and stored in the nonvolatile memory 57. The number of occurrences of 1 event is set to zero.

  For example, in the operation for initializing the cumulative lighting time shown in FIG. 13, the time t1 from the power-off timing indicated by reference symbol P4 to the power-on timing indicated by reference symbol P3 exceeds the monitoring time Toff. The initialization operation of the accumulated lighting time is canceled by the control circuit unit 53 at the power-on timing shown, and the number of occurrences of the first event stored in the nonvolatile memory 57 is made zero.

  Further, for example, in the operation for initializing the cumulative lighting time shown in FIG. 14, the time t2 from the power-on timing indicated by the symbol P2 to the power-off timing indicated by the symbol P4 exceeds the monitoring time Ton. At the power-off timing indicated by P4, the initialization operation of the cumulative lighting time is canceled by the control circuit unit 53, and the number of occurrences of the first event stored in the nonvolatile memory 57 is made zero.

  As described above, since the cumulative lighting time is initialized when the user performs a power on / off operation a predetermined number of times within a predetermined time, for example, the user turns on / off the switch SW1 every day. As in this case, it is possible to prevent the accumulated lighting time from being erroneously initialized by a power-on / off operation that is performed without the user intending to initialize the accumulated lighting time.

  The power supply voltage Vac is not supplied to the dimming ballast 6 via the illuminance correction unit 5 but directly supplied to the illuminance correction unit 5 and the dimming ballast 6 as shown in FIG. However, in this case, since the illuminance correction unit 5 cannot detect the input current Iin supplied to the dimming ballast 6, the end of life or discharge of the discharge lamp FL is determined based on the input current Iin. It cannot be detected that the electric light FL has been removed. Therefore, in the configuration shown in FIG. 15, it is necessary to output a signal CTX indicating the end of life or no load state from the dimming ballast 6 to the illuminance correction unit 5, and thus the dimming ballast 6 and the illuminance correction unit 5. Therefore, it is necessary to connect the signal cable CB3 for transmitting the signal CTX.

  On the other hand, in the discharge lamp lighting device 2 shown in FIG. 2, the illuminance correction unit 5 determines that the end of the life of the discharge lamp FL or the discharge lamp FL has been removed based on the input current Iin supplied to the dimming ballast 6. Therefore, it is not necessary to provide a signal cable CB3 between the dimming ballast 6 and the illuminance correction unit 5. Cost can be reduced and wiring work can be facilitated.

  In addition, when the user tries to initialize the cumulative lighting time when the discharge lamp FL is replaced, a mechanical forced reset switch or the like is provided for the user to instruct the initialization of the cumulative lighting time. In addition, since the accumulated lighting time can be initialized by a predetermined power on / off operation by the user, the cost of the reset switch can be reduced.

(Second Embodiment)
Next, a discharge lamp lighting device 2a according to a second embodiment of the present invention will be described. FIG. 16 is a block diagram showing an example of the configuration of the discharge lamp lighting device 2a according to the second embodiment of the present invention.

  The discharge lamp lighting device 2a shown in FIG. 16 is different from the discharge lamp lighting device 2 shown in FIG. 3 in the following points. That is, in the discharge lamp lighting device 2a shown in FIG. 16, the nonvolatile memory 57a stores a plurality of correction tables, for example, correction tables 571 and 572, for a plurality of types of discharge lamps FL, and the control circuit unit 53a When the discharge lamp FL is turned on, the type of the discharge lamp FL attached to the socket 4 is determined based on the detected voltage Vd detected by the current detector 52 which is an example of the first current detector, and the nonvolatile memory The difference is that the dimming signal generation unit 56 outputs the dimming signal CTL based on the correction table for the type of the determined discharge lamp FL stored in 57a.

  Since the other configuration is the same as that of the discharge lamp lighting device 2 shown in FIG. 3, the description thereof will be omitted, and the operation of the present embodiment will be described below. For example, when a discharge lamp such as JIS standard Hf32W is connected to the socket 4 to be lit and when a discharge lamp such as Hf86W is connected to the socket 4 to be lit, the input of the dimming ballast 6 The current Iin is significantly different, and the input current Iin when Hf86W is lit is about twice that when Hf32W is lit. Further, for example, as in the case of Hf86W and Hf32W, when the type of the discharge lamp is different, the light output lowering characteristic that is the degree of light flux deterioration is also different.

  Accordingly, the discharge lamp lighting device 2a shown in FIG. 16 stores, for example, a correction table 571 according to the light output reduction characteristic of Hf86W and a correction table 572 according to the light output reduction characteristic of Hf32W in the nonvolatile memory 57a. Yes.

  FIG. 17 is an explanatory diagram for explaining the operation of the discharge lamp lighting device 2a shown in FIG. First, in a state where the Hf32W discharge lamp FL is connected to the socket 4, when the user turns on the switch SW1 at the timing indicated by reference numeral P11 and the power is turned on, the control circuit unit 53a is output from the current detection unit 52. The detected voltage Vd is monitored. When the detection voltage Vd is lower than a predetermined reference voltage Vref2 set in advance at the timing indicated by reference sign P12, the discharge lamp FL connected to the socket 4 is determined to be Hf32W, and the correction table 572 Is selected.

  On the other hand, in a state where the Hf86W discharge lamp FL is connected to the socket 4, when the user turns on the switch SW1 at the timing indicated by P13 and the power is turned on, the control circuit unit 53a is output from the current detection unit 52. The detected voltage Vd is monitored. When the detection voltage Vd exceeds a predetermined reference voltage Vref2 set in advance at the timing indicated by reference symbol P14, the discharge lamp FL connected to the socket 4 is determined to be Hf86W, and the correction table 571 Is selected. In this case, the reference voltage Vref2 includes a detection voltage Vd corresponding to the input current Iin when the discharge lamp FL, for example, Hf86W is turned on, and a detection voltage Vd corresponding to the input current Iin when the Hf32W is turned on, for example. Is set in between.

  Thereafter, the correction table selected by the control circuit unit 53a is used in step S4 in the flowchart shown in FIG. 6, and the processing in steps S2 to S7 is repeated in the same manner as in the discharge lamp lighting device 2 shown in FIG. The dimming control is performed based on the correction table corresponding to the light output lowering characteristic according to the type of the discharge lamp FL and the cumulative lighting time, and the light output of the discharge lamp FL is almost independent of the cumulative lighting time of the discharge lamp FL. Maintained constant.

  In addition, as shown in FIG. 17, the type of the discharge lamp FL may be determined every time the power is turned on, but since the initial illuminance correction is performed, the dimming rate at the time of lighting is determined by the cumulative lighting time. Changes, so that the input current Iin at the time of lighting also changes. Therefore, the control circuit unit 53a may be configured to change the reference voltage Vref2 according to the cumulative lighting time.

  Further, the control circuit unit 53a determines the type of the discharge lamp FL at the time of lighting immediately after performing the initialization process of the cumulative lighting time, and stores the type information indicating the type in the nonvolatile memory 57a. When the power is turned on, the correction table may be selected according to the type information read from the nonvolatile memory 57a.

  Thereby, it is not necessary to use a different illuminance correction unit 5a for each type of discharge lamp FL, and a single illuminance correction unit 5a can be combined with a plurality of types of discharge lamps FL. Furthermore, it is possible to perform appropriate initial illuminance correction according to each type of discharge lamp FL.

  For example, as shown in FIG. 18, the illuminance correction unit 5a is provided with a reset switch SW2 made of, for example, a push button switch. When it is detected that the user has pressed the reset switch SW2, the control circuit unit 53a The cumulative lighting time stored in the nonvolatile memory 57 may be set to zero and the cumulative lighting time may be initialized. Thereby, the user can forcibly initialize the cumulative lighting time by the control circuit unit 53a.

  For example, as shown in FIG. 18, the illuminance correction unit 5a is provided with a setting switch SW3, which is an example of a type receiving unit such as a slide switch or a push button switch, and the user releases it using the setting switch SW3. By setting the type of the electric lamp FL, the control circuit unit 53a acquires the type information indicating the type of the discharge lamp FL, and the correction table is selected according to the type information in the initial illuminance correction processing. Good. As a result, the user can set the type information of the discharge lamp FL using the setting switch SW3, and the control circuit unit 53a can perform appropriate initial illuminance correction according to each type of the discharge lamp FL. Become.

  Further, in the discharge lamp lighting device 2a, a dimming instruction switch (not shown) attached to, for example, an indoor wall surface is connected to the illuminance correction unit 5a, and the user inputs a dimming ratio instruction using the dimming instruction switch. When a light control function for changing the light control ratio of the discharge lamp FL is provided, the light output reduction characteristic (maintenance rate) of the discharge lamp FL changes when the discharge lamp FL is lit in the light control state. . Therefore, the correction table 571 and the correction table 572 stored in the non-volatile memory 57a according to the dimming ratio received by the dimming instruction switch (not shown) by the control circuit unit 53a, the discharge lamp FL is dimmed. It may be corrected so as to cancel out the change in the light output reduction characteristic due to being turned on. Thereby, the light output of the discharge lamp FL can be maintained substantially constant regardless of the dimming ratio and the cumulative lighting time received by the unillustrated dimming instruction switch of the discharge lamp FL.

  19, for example, in the discharge lamp lighting device 2 shown in FIG. 3 and the discharge lamp lighting device 2a shown in FIG. 16, the illuminance correction units 5 and 5a include a filter circuit unit 58, and a terminal block 51. The power supply voltage Vac received by the power supply may be supplied to the current detection unit 52 and the control power supply circuit unit 54 via the filter circuit unit 58.

  For example, as shown in FIG. 20, the filter circuit unit 58 includes a capacitor C3 connected between the terminal blocks 51 and 51 to which the power supply voltage Vac is supplied, and a normal mode choke L2 connected to one terminal of the capacitor C3. A normal mode choke L3 connected to one terminal of the capacitor C3, a common mode choke L4 having input terminals connected to both ends of the capacitor C3 via normal mode chokes L2 and L3, and an output terminal of the common mode choke L4 And a series circuit of capacitors C4 and C5 connected between them, the connection point of the capacitors C4 and C5 is grounded, and the voltage across the series circuit of the capacitors C4 and C5 is supplied to the current detection unit 52 and the control power supply circuit unit 54 It has come to be. And all the electric power supplied to each part of the discharge lamp lighting devices 2 and 2a becomes a structure supplied through the filter circuit part 58. FIG.

  As a result, the noise terminal voltage generated when noise generated in the control power supply circuit unit 54, the control circuit units 53 and 53a, the dimming ballast 6 or the like leaks from the power supply line to the outside via the terminal blocks 51 and 51. Can be suppressed. In particular, since the inverter circuit included in the dimming ballast 6 performs a switching operation at a high frequency, noise accompanying this switching operation tends to be superimposed on the power supply voltage Vac via the cable CB1. The noise generated in the device 6 and the control power circuit 54 is reduced by the filter circuit 58, and the noise terminal voltage level leaking from the terminal blocks 51 and 51 to the outside of the discharge lamp lighting devices 2 and 2a is reduced. The influence of noise on other electrical devices connected to the same power supply system as the discharge lamp lighting devices 2 and 2a including the circuit unit 58 can be reduced.

  Further, since the noise level generated by the control power supply circuit unit 54 and the control circuit units 53 and 53a is lower than the noise level generated from the dimming ballast 6, only the power supply to the dimming ballast 6 is a filter circuit. The power supply to the control power supply circuit unit 54 may be performed directly from the terminal blocks 51 and 51 through the unit 58. In this case, high-level noise from the dimming ballast 6 is reduced by the filter circuit unit 58, and noise generated in the dimming ballast 6 is reduced from being applied to the control power circuit unit 54. Therefore, the noise terminal voltage level leaking to the outside of the discharge lamp lighting devices 2 and 2a can be reduced, and the influence of noise on the control power supply circuit unit 54 and the control circuit units 53 and 53a can be reduced.

It is a perspective view which shows an example of the external appearance of the illuminating device which concerns on one Embodiment of this invention. It is a perspective view which shows an example of the external appearance of the discharge lamp lighting device shown in FIG. It is a block which shows an example of a structure of the discharge lamp lighting device which concerns on the 1st Embodiment of this invention. It is a circuit diagram which shows an example of a detailed structure of the illumination intensity correction | amendment part in the discharge lamp lighting device shown in FIG. It is explanatory drawing for demonstrating the operation | movement at the time of the lighting start of the discharge lamp by the discharge lamp lighting device shown in FIG. It is a flowchart which shows an example of operation | movement of the discharge lamp lighting device shown in FIG. It is explanatory drawing which shows an example of the correction table memorize | stored in the non-volatile memory in the discharge lamp lighting device shown in FIG. It is explanatory drawing for demonstrating an example of operation | movement of the discharge lamp lighting device shown in FIG. It is explanatory drawing for demonstrating an example of operation | movement of the discharge lamp lighting device shown in FIG. It is explanatory drawing for demonstrating an example of operation | movement of the discharge lamp lighting device shown in FIG. It is explanatory drawing for demonstrating an example of operation | movement of the discharge lamp lighting device shown in FIG. It is explanatory drawing for demonstrating an example of operation | movement of the discharge lamp lighting device shown in FIG. It is explanatory drawing for demonstrating an example of operation | movement of the discharge lamp lighting device shown in FIG. It is explanatory drawing for demonstrating an example of operation | movement of the discharge lamp lighting device shown in FIG. It is a perspective view which shows another example of the discharge lamp lighting device shown in FIG. It is a block diagram which shows an example of a structure of the discharge lamp lighting device which concerns on the 2nd Embodiment of this invention. It is explanatory drawing for demonstrating operation | movement of the discharge lamp lighting device shown in FIG. It is a perspective view which shows an example of the external appearance of the discharge lamp lighting device shown in FIG. It is a block diagram which shows the modification of the discharge lamp lighting device shown in FIG. 3, FIG. FIG. 20 is a circuit diagram illustrating an example of a filter circuit unit 58 illustrated in FIG. 19. It is explanatory drawing for demonstrating operation | movement of the discharge lamp lighting device which concerns on background art. It is explanatory drawing for demonstrating operation | movement of the discharge lamp lighting device which concerns on background art. It is explanatory drawing for demonstrating operation | movement of the discharge lamp lighting device which concerns on background art. It is a block diagram which shows the structure of the discharge lamp lighting device which concerns on background art. It is a perspective view which shows the external appearance of the discharge lamp lighting device which concerns on background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Illuminating device 2, 2a Discharge lamp lighting device 3 Housing | casing 4 Socket 5, 5a Illuminance correction part 6 Dimming ballast 7 Connector 51 Terminal block 52 Current detection part 53, 53a Control circuit part 54 Control power supply circuit part 55 Clock counter 56 Dimming signal generation unit 57, 57a Non-volatile memory 58 Filter circuit unit 571, 572 Correction table C1, C2, C3, C4, C5 Capacitors CB1, CB2 Cable CTL Dimming signal FL Discharge lamp Iin Input current L1 Transformer Q1 Transistor R1 , R2, R3, R4, R5, R6 Resistor SW2 Reset switch SW3 Setting switch Toff, Ton Monitoring time Vd Detection voltage Vdc Power supply voltage for operation Vref1 Reference voltage Vref2 Reference voltage

Claims (12)

A socket for mounting a discharge lamp; a lighting drive unit that supplies power for lighting to the discharge lamp through the socket; and a power reception unit that receives a power supply voltage supplied from the outside and supplies the power supply voltage to the lighting drive unit A discharge lamp lighting device comprising: a control unit that outputs a dimming signal for instructing a power supply amount to the discharge lamp and causes the lighting drive unit to perform a power supply operation according to a type of the discharge lamp. Because
A discharge lamp lighting device comprising: a connection unit that connects the control unit and the lighting drive unit. The controller is
A timekeeping unit that counts the lighting time of the discharge lamp cumulatively as the cumulative lighting time;
An illuminance correction unit that outputs the dimming signal according to the cumulative lighting time measured by the time measuring unit,
The discharge lamp lighting device according to claim 1, comprising: The control unit further includes a table storage unit that stores a correction table in which the cumulative lighting time and a dimming ratio for correcting the light output are associated with each other in a predetermined type of discharge lamp,
The illuminance correction unit outputs the dimming signal so as to obtain a dimming ratio associated with the cumulative lighting time measured by the time measuring unit by the correction table stored in the table storage unit. The discharge lamp lighting device according to claim 2. A type accepting unit that accepts input of type information indicating the type of the discharge lamp;
The table storage unit stores a plurality of the correction tables for a plurality of types of discharge lamps,
The said illumination intensity correction | amendment part outputs the said light control signal based on the said correction table corresponding to the kind of discharge lamp shown by the kind information received by the said kind reception part. Discharge lamp lighting device. The control unit further includes a first current detection unit that detects a current supplied from the power reception unit to the lighting drive unit,
The table storage unit stores a plurality of the correction tables for a plurality of types of discharge lamps,
The illuminance correction unit determines the type of the discharge lamp attached to the socket based on the detected current value detected by the first current detection unit when the discharge lamp is lit, and stores the type in the table storage unit 4. The discharge lamp lighting device according to claim 3, wherein the dimming signal is output based on a correction table for the determined type of the discharge lamp. The control unit further includes a second current detection unit that detects a current supplied from the power reception unit to the lighting drive unit,
The time counting unit cumulatively calculates a period of time during which the detected current value detected by the second current detecting unit is equal to or greater than a first current value that is a detected current value when the discharge lamp is turned on. The discharge lamp lighting device according to any one of claims 2 to 5, wherein time is measured as a cumulative lighting time. The lighting drive unit repeats the start and stop of power supply to the discharge lamp when the filament in the discharge lamp is abnormal,
The time measuring unit is configured such that a detected current value detected by the second current detecting unit is higher than a detected current value when the discharge lamp is turned on while the power receiving unit continues to receive the power supply voltage. 7. The discharge lamp lighting according to claim 6, wherein the counted cumulative lighting time is set to zero when the second current value, which is a small current value, rises and falls a predetermined number of times in advance. apparatus.   The timing unit further has a detected current value detected by the second current detecting unit after the power receiving unit starts receiving the power supply voltage, more than a detected current value when the discharge lamp is turned on. When the first event which is a case where the second current value which is a small current value is less than a predetermined number of times which has been set in advance, the accumulated cumulative lighting time is set to zero. The discharge lamp lighting device according to claim 6 or 7, characterized in that   The timekeeping unit sets the timed cumulative lighting time to zero when the first event occurs a predetermined number of times within a predetermined monitoring time set in advance. The discharge lamp lighting device according to claim 8.   In the illuminance correction unit, a first detection current value detected by the second current detection unit after the cumulative lighting time is set to zero by the timer unit is a detection current value when the discharge lamp is turned on. When the period of time equal to or more than the current value continues beyond a predetermined time set in advance, the dimming signal is output and the lighting drive unit is supplied with power according to the type of the discharge lamp. The discharge lamp lighting device according to claim 7, wherein the discharge lamp lighting device is performed. A dimming ratio receiving unit for receiving an input of the dimming ratio of the discharge lamp;
The illuminance correction unit further corrects the correction table stored in the table storage unit according to the dimming ratio received by the dimming ratio receiving unit. The discharge lamp lighting device according to any one of the above. A discharge lamp lighting device for lighting the discharge lamp, and a housing for housing the discharge lamp lighting device,
The said discharge lamp lighting device is a discharge lamp lighting device in any one of Claims 1-11, The illuminating device characterized by the above-mentioned.

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