CN1767711B - Discharge lamp lighting device and lighting fixture - Google Patents

Abstract

The invention provides a discharge lamp lighting device allowing a cumulative operation time of a high-frequency lighting device to be obtained and capable of correcting illuminance; and to provide a luminaire. This discharge lamp lighting device is provided with: the high-frequency lighting device for energizing a discharge lamp; a timer means for cumulatively counting the operation time of the high-frequency lighting device; a nonvolatile storage means for storing the cumulative operation time of the high-frequency lighting device cumulatively counted by the timer means; a dimming signal generation means for generating a dimming signal based on the cumulative operation time and the cumulative operation time in the latest lamp replacement; and a control means for controlling the high-frequency lighting device according to the dimming signal.

Description

Discharge lamp lighting device and lighting fixture

technical field

The invention relates to a discharge lamp lighting device and a lighting appliance with dimming function.

Background technique

In order to correct the decrease of the light output of the discharge lamp due to the change over time and the decrease of the light output due to the dirt caused by the long-term use, there is known a method of measuring the cumulative lighting of the discharge lamp after the replacement of the discharge lamp. A lighting device that increases the dimming level based on the accumulated lighting time. Furthermore, the cumulative lighting time is reset every time the discharge lamp is replaced. Here, a lighting device is proposed that detects the end of life of the discharge lamp and automatically resets the accumulated lighting time, or manually resets the accumulated lighting time. (For example, refer to Patent Document 1)

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-15276 (page 8, FIG. 14 )

The lighting device of Patent Document 1 only resets the cumulative lighting time of the discharge lamp each time it detects the end of the life of the discharge lamp or each time the discharge lamp is replaced, so it is impossible to measure the lighting device for the discharge lamp (inverted). Phase device) life, sometimes beyond its life and use. As a result, a problem may arise in the lighting device for the discharge lamp, and the discharge lamp may not be able to exhibit the set electrical characteristics. Furthermore, it is impossible to grasp the lifetime of an actual lighting device for a discharge lamp.

Contents of the invention

It is an object of the present invention to provide a discharge lamp lighting device and a lighting fixture capable of acquiring the accumulated operating time of a high-frequency lighting device and performing illuminance correction.

The discharge lamp lighting device according to claim 1 of the present invention is characterized in that it includes: a high-frequency lighting device for supplying energy to the discharge lamp; a timing device for cumulatively counting the operation time of the high-frequency lighting device; A non-volatile storage device that stores the cumulative operating time of the high-frequency lighting device that is counted cumulatively; a dimming signal generating device that generates a dimming signal based on the aforementioned cumulative operating time and the latest cumulative operating time when the lamp is replaced; and A control device for controlling the high-frequency lighting device according to the aforementioned dimming signal.

In the present invention and each of the following inventions, unless otherwise specified, each configuration is as follows. The operating time of the high-frequency lighting device may also be the lighting time of the discharge lamp. This is because the time during which the high-frequency lighting device operates can be considered substantially as the time during which the discharge lamp is lit. For example, when the switch of the discharge lamp lighting device is turned on, a timer circuit that manages the filament warm-up time, discharge time, and lighting time operates to operate the high-frequency lighting device.

During the above filament warm-up time, since the discharge lamp is not turned on, the operation time of the high-frequency lighting device is strictly different from the lighting time of the discharge lamp. However, the above-mentioned filament warm-up time is a few milliseconds, which is a negligible time for the life time (12,000 hours) of a discharge lamp, for example, which means in the present invention that the operating time of the high-frequency lighting device as described above and The lighting time of the discharge lamps is substantially the same. In addition, it is considered that the operating time of the discharge lamp lighting device including the high frequency lighting device is substantially the same as the operating time of the above high frequency lighting device and the lighting time of the discharge lamp.

The dimming signal can be, for example, a rectangular wave voltage or a direct current voltage.

[The accumulative operating time based on the latest lamp replacement and the cumulative operating time based on the latest lamp replacement] mean the operating time of the high-frequency lighting device based on the latest lamp replacement. The operating time of the high-frequency lighting device from the time of lamp replacement can be determined by operating the internal clock at the time of the latest lamp replacement, and the accumulated operating time of the high-frequency lighting device and the latest lamp replacement can also be calculated. Calculated from the difference of the accumulated operation time.

If the present invention is used, the operating time of the high-frequency lighting device can be accumulated and counted by the timing device, and stored in the non-volatile storage device. Moreover, at each lamp replacement, a dimming signal based on the cumulative operating time of the high-frequency lighting device and the cumulative operating time of the high-frequency lighting device at the time of lamp replacement is generated, and the output of the high-frequency lighting device is output according to the dimming signal. Take control. Then, the dimming level of the discharge lamp is changed using the dimming signal.

The discharge lamp lighting device according to claim 2 of the present invention is characterized in that it includes: a high-frequency lighting device for supplying energy to the discharge lamp; a timing device for cumulatively counting the operation time of the high-frequency lighting device; A non-volatile storage device that stores the cumulative operating time of the high-frequency lighting device that has been counted and the cumulative operating time at the latest lamp replacement; calculates the difference between the aforementioned cumulative operating time and the cumulative operating time at the latest lamp replacement, A dimming signal generation device that generates a dimming signal based on the difference; and a control device that controls the high-frequency lighting device based on the aforementioned dimming signal.

If the present invention is used, the operating time of the high-frequency lighting device can be accumulated and counted by the timing device, and stored in the non-volatile storage device. And every time the high-frequency lighting device operates, the difference between the cumulative operating time of the high-frequency lighting device and the cumulative operating time at the latest lamp replacement is calculated, and a dimming signal based on the difference is generated, and the dimming The signal controls the output of the high frequency lighting device. Then, the dimming level of the discharge lamp is changed using the dimming signal.

The discharge lamp lighting device according to claim 3 of the present invention is characterized in that the dimming signal generator generates a dimming signal based on the difference in order to supplement the reduced light beam according to the lighting time of the discharge lamp, so that the discharge lamp The dimming level increases from the initial dimming level.

If the present invention is used, the dimming signal can be generated based on the difference between the cumulative operating time of the high-frequency lighting device and the aforementioned cumulative operating time when the latest lamp is replaced, so that the dimming level of the discharge lamp is increased from the initial dimming level, so high The frequency lighting device can increase the dimming level of the discharge lamp from the initial dimming level according to the operating time from when the lamp is replaced. As a result, the luminous flux which is reduced corresponding to the lighting time of the discharge lamp is supplemented.

The discharge lamp lighting device according to item 4 of the present invention includes a lamp connection detection device for detecting the connection state of the high-frequency lighting device and the discharge lamp, and is characterized in that: when the lamp connection detection device detects that the high-frequency lighting device and the discharge lamp When the lamp is not connected, the cumulative operating time of the high-frequency lighting device counted by the timing device is set to the cumulative operating time of the latest lamp replacement.

The "lamp connection detection device detects disconnection between the high-frequency lighting device and the discharge lamp" includes cleaning the discharge lamp and lighting fixtures in addition to replacing the discharge lamp with a new one. When cleaning the discharge lamp and the lighting fixture, even if the dimming level of the discharge lamp is set to the initial dimming level, the set brightness can be ensured. Furthermore, the disconnection between the high-frequency lighting device and the discharge lamp is detected by the lamp connection detection device, and it is of course also possible to detect lamp removal during lamp replacement and lamp cleaning.

If the present invention is used, when the lamp connection detecting device detects that the high-frequency lighting device and the discharge lamp are not connected, when the discharge lamp is connected to the high-frequency lighting device, the dimming level of the discharge lamp is based on the high The operating time of the frequency lighting device increases from the initial dimming level.

The discharge lamp lighting device according to claim 5 of the present invention is characterized in that it includes: a high-frequency lighting device for supplying energy to the discharge lamp; a timing device for cumulatively counting the operation time of the discharge lamp; A non-volatile storage device for storing the accumulated lighting of the timed discharge lamp; a dimming signal generating device for generating a dimming signal based on the aforementioned accumulated lighting time and the latest accumulated lighting time when the lamp is replaced; and a dimming signal generating device based on the aforementioned dimming signal A control device for controlling a high-frequency lighting device.

The cumulative lighting time of the discharge lamp refers to the lighting time of all the discharge lamps connected to the high-frequency lighting device. That is, when the discharge lamp is replaced several times, etc., the integrated value of the lighting time of each lamp is formed.

According to the present invention, the lighting time of the discharge lamp is accumulated and counted by the timing device, and stored in the non-volatile storage device. And every time the lamp is replaced, a dimming signal based on the accumulated lighting time of the discharge lamp and the accumulated lighting time of the discharge lamp at lamp replacement is generated, and the high-frequency lighting device is controlled based on the dimming signal. Then, the dimming level of the discharge lamp is changed using the dimming signal.

The lighting fixture according to claim 6 of the present invention is characterized by comprising: the discharge lamp lighting device according to any one of claims 1 to 5 of the invention; and a lighting device equipped with the discharge lamp lighting device. Appliance body.

According to the present invention, it is possible to provide a lighting fixture capable of obtaining the accumulated operating time of the high-frequency lighting device and correcting the luminous flux which decreases according to the lighting time of the discharge lamp every time the discharge lamp is replaced.

According to the first aspect of the present invention, the cumulative operating time of the high-frequency lighting device can be obtained by reading the cumulative operating time of the high-frequency lighting device stored in the non-volatile storage device. Moreover, since the high-frequency lighting device is controlled according to the dimming signal based on its own cumulative operating time and the cumulative operating time of the latest lamp replacement, the illuminance can be corrected according to the operating time from the lamp replacement, and the discharge The lamp gets roughly a constant beam.

According to the second aspect of the present invention, the cumulative operating time of the high-frequency lighting device can be obtained by reading the cumulative operating time of the high-frequency lighting device stored in the non-volatile storage device. Furthermore, since the dimming signal based on the difference between the cumulative operating time of the high-frequency lighting device and the cumulative operating time at the latest lamp replacement is generated, and the high-frequency lighting device is controlled based on the dimming signal, the high-frequency lighting device The illuminance can be corrected according to the operating time from the lamp replacement, and a substantially constant light beam can be obtained from the discharge lamp.

According to the third aspect of the present invention, since the high-frequency lighting device increases the dimming level of the discharge lamp from the initial dimming level according to the operating time from the time of lamp replacement, it can be reduced according to the lighting time of the discharge lamp. By supplementing the luminous flux, a substantially constant luminous flux can be obtained from the discharge lamp until the lifetime of the discharge lamp or the replacement of the discharge lamp.

As in the fourth aspect of the present invention, when the discharge lamp is connected to the high-frequency lighting device, the dimming level of the discharge lamp is changed from the initial dimming level according to the operation time of the high-frequency lighting device from the time of connection. Since the luminous flux increases, the luminous flux that decreases according to the lighting time of the discharge lamp can be supplemented, and a substantially constant luminous flux can be obtained from the discharge lamp.

According to the fifth aspect of the present invention, the cumulative operating time of the high-frequency lighting device can be obtained by reading the cumulative operating time of the high-frequency lighting device stored in the non-volatile storage device. Moreover, since the high-frequency lighting device is controlled based on the dimming signal based on the cumulative lighting time of the discharge lamp and the cumulative lighting time at the latest lamp replacement, the illuminance can be corrected based on the operating time from the lamp replacement, and the discharge The lamp gets roughly a constant beam.

According to the sixth aspect of the present invention, it is possible to provide a lighting fixture capable of obtaining the cumulative operating time of the high-frequency lighting device and correcting a luminous flux that decreases according to the lighting time of the discharge lamp.

Description of drawings

Fig. 1 is a block diagram including a partial circuit diagram of a discharge lamp lighting device according to a first embodiment of the present invention.

Fig. 2 shows the control of the dimming level of the discharge lamp, (a) is the change diagram of the dimming level for the cumulative operating time of the inverter circuit, (b) is the change diagram of the dimming signal for the cumulative operating time of the inverter circuit Change graph.

Fig. 3 shows the control of the dimming level of another discharge lamp, (a) is the change diagram of the dimming level for the cumulative operating time of the inverter circuit, (b) is the dimming for the cumulative operating time of the inverter circuit The change graph of the signal.

4 is a block diagram including a partial circuit diagram of a discharge lamp lighting device according to a second embodiment of the present invention.

Fig. 5 is an external view of a lighting fixture according to a third embodiment of the present invention

1: Discharge lamp lighting device 2: High frequency lighting device

3: Fluorescent lamps 3a, 3b: Filament electrodes

4: Light connection detection circuit 5: Control circuit

6: Timing department 7: Non-volatile storage department

8: Dimming signal generation unit 9: Main control unit

10: Life detection circuit 11: Rectification and smoothing circuit

12: Active filter circuit 13: Inverting circuit

14a, 14b, 15a, 15b: output terminal 16: drive circuit

17: Lighting fixtures 18: Main body of lighting fixtures

19: Cover 19a: Reflective surface

20: Lamp socket 21: Lighting device for discharge lamp

A: Midpoint of resistor R1 and resistor R2 B: Midpoint of diode D1 and resistor R5

C1: Capacitor for DC cut-off C2: Capacitor for starting and resonance

C3, C4, C11: Capacitors CP1: Comparator

D1～D3: Diodes E: Substrate grounding

FET1, FET2: field effect transistor L1: inductor for current limiting and resonance

R1～R6, R10, R11, R12, R13: resistance

Tr1: P-type bipolar transistor Tr2: N-type bipolar transistor

Tr10: bipolar transistor Vref1: reference power supply

Detailed ways

Next, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described. 1 to 3 show the first embodiment of the present invention, and Fig. 1 shows a block diagram including a partial circuit diagram of the discharge lamp lighting device, and Fig. 2 shows the control of the dimming level of the discharge lamp, and Fig. 2 (a ) shows the change of the dimming level for the cumulative operating time of the inverter circuit, Figure 2(b) shows the change diagram of the dimming signal for the cumulative operating time of the inverter circuit, and Figure 3 shows another For the control of the dimming level of the discharge lamp, Figure 3(a) shows the change of the dimming level for the cumulative operating time of the inverter circuit, and Figure 3(b) shows the adjustment for the cumulative operating time of the inverter circuit. Variation diagram of the light signal.

The discharge lamp lighting device 1 includes a high frequency lighting device 2, a fluorescent lamp 3 as a discharge lamp, a lamp connection detection circuit 4 and a control circuit 5 as a lamp connection detection device. Moreover, the configuration of the control circuit 5 includes a timing unit 6 as a timing device, a non-volatile storage unit 7 as a non-volatile storage device, a dimming signal generating unit 8 as a dimming signal generating device, and a control unit as a control device. Main control part 9. Furthermore, a life detection circuit 10 for detecting the end of life of the fluorescent lamp 3 is provided.

The configuration of the high-frequency lighting device 2 includes a rectification and smoothing circuit 11 , an active filter circuit 12 and an inverter circuit 13 . The rectifying and smoothing circuit 11 rectifies and smoothes the AC voltage of the commercial AC power supply Vs, and inputs the DC voltage to the active filter circuit 12 . The active filter circuit 12 is, for example, a boost clipping circuit, which converts the input DC voltage into a set output voltage, and inputs it to the inverter circuit 13 .

The inverter circuit 13 forms a half bridge using field effect transistors FET1 and FET2 in order to convert the DC voltage output from the active filter circuit 12 into a high frequency voltage and output it. That is, the series circuit of the field effect transistor FET1 and the field effect transistor FET2 is connected to the output side of the active filter circuit 12, and between the drain and the source of the field effect transistor FET2, the inductor L1 for current limiting and resonance is connected in series. A DC cut-off capacitor C1 and a start-up and resonance capacitor C2 (shown in the lamp connection detection circuit 4 ). The starting and resonance capacitor C2 is connected between the filament electrodes 3 a and 3 b on the non-power supply side of the fluorescent lamp 3 . Both ends of the filament electrodes 3a, 3b of the fluorescent lamp 3 are respectively connected to output terminals 14a, 14b, 15a, 15b of the high-frequency lighting device 2 (inverting circuit 13). The starting and resonance capacitor C2 is connected between the output terminals 14b and 15b of the high-frequency lighting device 2 .

Furthermore, the gates of the field effect transistor FET1 and the field effect transistor FET2 are respectively connected to a drive circuit 16 , and the drive circuit 16 is connected to the main control unit 9 of the control circuit 5 . The driving circuit 16 makes the field effect transistors FET1 and FET2 alternately switch on and off at a set frequency when the fluorescent lamp 3 is warmed up, started and turned on according to a control signal from the main control unit 9 .

The high-frequency lighting device 2 configured as described above outputs high-frequency voltages to the output terminals 14a, 14b, 15a, and 15b by switching operations of the field effect transistors FET1 and FET2. At this time, the main control unit 9 may output a control signal to the drive circuit 16 based on the dimming signal output from the dimming signal generating unit 8 to dim and turn on the fluorescent lamp 3 . In addition, the fluorescent lamp 3 connects both ends of the filament electrodes 3a, 3b to output terminals 14a, 14b, 15a, 15b through unshown lamp sockets, respectively, and is powered by the high-frequency lighting device 2 .

Furthermore, a life detection circuit 10 is connected between the output terminals 14a and 15a of the high-frequency lighting device 2 . The configuration of the life detection circuit 10 includes a series circuit of a resistor R1 and a resistor R2 connected between the output terminals 14a and 15a, a comparator CP1, and a reference power supply Verf1. The resistor R1 and the resistor R2 divide the lamp voltage of the fluorescent lamp 3 .

The comparator CP1 has an inverting input terminal connected to the reference power supply Vref1, and a non-inverting input terminal connected to the midpoint A of the resistors R1 and R2. That is, the comparator CP1 inputs the reference voltage of the reference power supply Verf1 to the inverting input terminal, and inputs the voltage of the aforementioned midpoint A to the non-inverting input terminal. Further, the negative side of the reference power supply Verf1 is connected to the substrate ground E. As shown in FIG. Also, the substrate ground E is connected to the source side of the field effect transistor FET2. Furthermore, an output terminal of the comparator CP1 is connected to the main control unit 9 of the control circuit 5 .

The comparator CP1 outputs a permission signal to the main control unit 9 when the voltage at the midpoint A (the voltage across the resistor R2 ) is greater than or equal to the reference voltage of the reference power supply Vref1 . That is, the life detection circuit 10 detects the lamp voltage and the no-load voltage (not turned on) of the fluorescent lamp 3 at the end of its life, and outputs a detection signal to the main control unit 9 .

Moreover, the composition of the lamp connection detection circuit 4 includes resistors R3-R6, capacitors C3, C4, diodes D1-D3, P-type bipolar transistor Tr1 (P-type bipolar transistor) and N-type bipolar transistor Tr2 (N-type bipolar transistor). bipolar transistor). That is, a resistor R3 is connected between the drain of the field effect transistor FET1 and the output terminal 14a of the high-frequency lighting device 2, a capacitor C3 is connected between the output terminals 14a and 14b, a resistor R4 is connected between the output terminals 14b and 15b, and a capacitor C3 is connected between the output terminals 14b and 15b. A capacitor C4 is connected between 15a and 15b, and a series circuit of a diode D1 and a resistor R5 is connected between the output terminal 15a and the source of the field effect transistor FET2. Furthermore, between the output terminal 14a and the source of the field effect transistor FET2, a resistor R6, an emitter (emitter) and a collector (collector) of the bipolar transistor Tr1, a diode D2, and a base (base) of the bipolar transistor Tr2 are connected. , The series circuit of the emitter. Furthermore, the base of the bipolar transistor Tr1 is connected to the midpoint B of the diode D1 and the resistor R5 through the diode D3 , and the collector of the bipolar transistor Tr2 is connected to the main control unit 9 of the control circuit 5 . The collector of the bipolar transistor Tr2 forms an output terminal of the lamp connection detection circuit 4 .

If the filament electrodes 3a, 3b of the fluorescent lamp 3 are connected to the output terminals 14a, 14b, 15a, 15b of the high-frequency lighting device 2 (inverting circuit 13), when the active filter circuit 12 operates, the inverter circuit 13 The drain side of the field effect transistor FET1 flows along the path of the resistor R3, the filament electrode 3a of the fluorescent lamp 3, the resistor R4, the filament electrode 3b of the fluorescent lamp 3, the diode D1, the resistor R5, and the source side of the field effect transistor FET2. current. At this time, the respective resistance values of the resistors R3 to R6 are set in advance so that the potential at the midpoint B of the diode D1 and the resistor R5 becomes higher than the potential at the emitter side of the bipolar transistor Tr1. As a result, since the bipolar transistor Tr1 is not turned on, the bipolar transistor Tr2 is also not turned on, so that the main control section 9 of the control circuit 5 is not connected to the substrate ground.

Furthermore, if the filament electrode 3a of the fluorescent lamp 3 is not connected to the output terminals 14a, 14b of the high frequency lighting device 2, the DC current flowing from the drain of the field effect transistor FET1 through the resistor R3 is blocked by the capacitor C3. Furthermore, if the filament electrode 3b of the fluorescent lamp 3 is not connected to the output terminals 15a, 15b, the direct current from the drain side of the field effect transistor FET1 is blocked by the capacitor C4. That is, if at least one of the filament electrodes 3a, 3b of the fluorescent lamp 3 is not connected to the output terminals 14a, 14b, 15a, 15b of the high-frequency lighting device 2, current does not flow to the resistor R5. At this time, the potential at the midpoint B of the diode D1 and the resistor R5 is set to be lower than the potential at the emitter side of the bipolar transistor Tr1. As a result, from the drain side of the field effect transistor FET1, along the resistor R3, the resistor R6, the emitter of the bipolar transistor Tr1, the base (base), the aforementioned midpoint B, the resistor R5, and the source side of the field effect transistor FET2 path, a current flows, so the bipolar transistor Tr1 is turned on.

When the bipolar transistor Tr1 is turned on, the input voltage of the inverter circuit 13 (the output voltage of the active filter circuit 12) drops due to the resistance R3 and the resistance R6, etc., and is applied to the base of the bipolar transistor Tr2. pole, turning on the bipolar transistor Tr2. When the bipolar transistor Tr2 is turned on, the main control unit 9 of the control circuit 5 is connected to the substrate ground E through the collector and emitter of the bipolar transistor Tr2. Here, a configuration is adopted in which the main control unit 9 stops the drive power supply after the main control unit 9 is grounded to the substrate. That is, the main control unit 9 cannot control the switching operations of the field effect transistors FET1 and FET2 of the inverter circuit 13 and stops the operation of the inverter circuit 13 .

In this way, the lamp connection detection circuit 4 detects the connection state of the high-frequency lighting device 2 (inverting circuit 13 ) and the fluorescent lamp 3 . That is, when bipolar transistor Tr2 is turned on, disconnection between high frequency lighting device 2 and fluorescent lamp 3 is detected, and when bipolar transistor Tr2 is turned off, connection between high frequency lighting device 2 and fluorescent lamp 3 is detected. Moreover, when the lamp connection detection circuit 4 detects that the high-frequency lighting device 2 and the fluorescent lamp 3 are not connected, the switching operation of the field effect transistors FET1 and FET2 of the main control part 9 of the control circuit 5 is stopped, and no signal is sent to the output terminal 14a. , 14b, 15a, 15b output high-frequency voltage.

The configuration of the control circuit 5 includes a main control unit 9 . Furthermore, the main control unit 9 is connected to the timer unit 6 , the non-volatile storage unit 7 , and the dimming signal generation unit 8 . The timing unit 6 counts the operating time of the inverter circuit 13 under the control of the main control unit 9 . That is, the time is counted when the main control unit 9 sends a control signal to the drive circuit 16 and switches the field effect transistors FET1 and FET2. Furthermore, the accumulated operating time of the inverter circuit 13 is written in the non-volatile storage unit 7 and stored therein. The timer unit 6 and the main control unit 9 form a timer device.

The non-volatile storage unit 7 stores the cumulative operating time of the inverter circuit 13 counted by the timing unit 6 . Furthermore, the aforementioned accumulated operating time at the time of lamp replacement is stored. In addition, the life time (for example, 12000 hours) of the fluorescent lamp 3 set in advance, etc. are stored.

The dimming signal generator 8 generates a dimming signal for dimming the fluorescent lamp 3 based on the cumulative operating time of the inverter circuit 13 (high-frequency lighting device 2) and the latest cumulative operating time when the lamp is replaced, and converts the dimming signal to the fluorescent lamp 3. The signal is output to the configuration of the main control unit 9 . For example, the difference between the cumulative operating time of the inverter circuit 13 and the cumulative operating time at the latest lamp replacement is calculated, and a dimming signal is generated based on the difference. The accumulated operating time of the inverter circuit 13 is added according to the operation of the inverter circuit 13 during operation. Furthermore, the above-mentioned accumulated operating time at the latest lamp replacement is read from the non-volatile storage unit 7 by the main control unit 9 . Therefore, when the inverter circuit 13 is operating, the cumulative operating time of the inverter circuit 13 increases according to the operation of the inverter circuit 13, and the aforementioned difference also increases.

Furthermore, when the lamp connection detection circuit detects that the high-frequency lighting device 2 and the fluorescent lamp 3 are connected, that is, when the high-frequency lighting device 2 is connected to the fluorescent lamp 3 , the dimming signal generation unit 8 outputs a signal that causes the fluorescent lamp 3 to adjust to the initial dimming level. (for example, 70%) to perform a dimming signal for turning on the lamp, and then output a dimming signal for increasing the dimming level of the fluorescent lamp 3 from the initial dimming level based on the aforementioned difference. Furthermore, after a predetermined life time (for example, 12,000 hours), a dimming signal is output to make the dimming level of the fluorescent lamp 3 approximately 100% (full light). That is, the dimming signal generating unit 8 calculates and outputs the PWM dimming signal based on the difference using a preset function. For example, at the initial dimming level (70%), a PWM dimming signal with a power rate of 30% (on duty) is output, and the power value is reduced according to the aforementioned difference, and the dimming level at the life time of the fluorescent lamp 3 is reached When 100% (full light), the PWM dimming signal with a power rate of 0% is output.

Furthermore, the main control unit 9 changes the switching frequency of the field effect transistors FET1 and FET2 according to the dimming signal from the dimming signal generating unit 8 . Thereby, the fluorescent lamp 3 increases the dimming level from the initial dimming level (70%) according to the above-mentioned difference, and lights up at the dimming level of approximately 100% (full light) after the lifetime of the fluorescent lamp 3 . That is, the decrease in light output due to the aging of the fluorescent lamp 3 and the decrease in light output due to dirt associated with long-term use are corrected, and a substantially constant luminous flux is output from the fluorescent lamp 3 .

In this way, the dimming signal generation unit 8 controls the main control unit 9 so that the dimming level of the fluorescent lamp 3 is increased according to the above-mentioned difference in order to compensate for the reduced luminous flux according to the lighting time of the fluorescent lamp 3 . In addition, the dimming signal generator 8 may generate a dimming signal based on the cumulative operating time of the inverter circuit 13 (high frequency lighting device 2 ) and the cumulative operating time at the latest lamp replacement, in addition to the aforementioned difference.

The main control unit 9 includes a CPU (Central Processing Unit) for arithmetic processing, a ROM for storing programs, and a RAM for storing various data, and performs various controls according to the programs.

Moreover, the main control unit 9 is connected to the drive circuit 16 of the inverter circuit 13, and transmits the switching frequency of the field effect transistors FET1 and FET2 of the inverter circuit 13 according to the dimming signal output from the dimming signal generating unit 8. The control signal that makes the change.

Further, the main control unit 9 is connected to the life detection circuit 10 and receives a detection signal (permission signal) for detecting the end of the life of the fluorescent lamp 3 . That is, when the lamp voltage of the fluorescent lamp 3 rises above a set value, or when the fluorescent lamp 3 is turned off, a life detection signal (permission signal) of the fluorescent lamp 3 is input.

Furthermore, the main control unit 9 is connected to the lamp connection detection circuit 4, and stops the drive power supply when the high-frequency lighting device 2 and the fluorescent lamp 3 are not connected.

Moreover, when the main control unit 9 detects that the high-frequency lighting device 2 and the fluorescent lamp 3 are disconnected after the lamp connection detection circuit 4 detects the connection again, the counting operation of the high-frequency lighting device 2 counted by the counting unit 6 is performed. The time is set as the aforementioned accumulated operating time at the latest lamp replacement, and is stored in the non-volatile storage unit 7 .

Next, the action of the first embodiment of the present invention will be described. In the state where the lamp connection detection circuit 4 detects the connection between the high-frequency lighting device 2 and the fluorescent lamp 3, that is, the filament electrodes 3a, 3a, In the case of 3b, when the commercial AC current Vs is turned on, the field effect transistors FET1 and FET2 of the inverter circuit 13 perform switching operations under the control of the main control unit 9 of the control circuit 5 . Then, the high-frequency voltage of the inverter circuit 13 is output to the output terminals 14a, 14b, 15a, and 15b, and the fluorescent lamp 3 is turned on.

When the main control part 9 makes the field effect transistors FET1 and FET2 switch, the timing part 6 is used to cumulatively count the operating time of the inverter circuit 13 (high-frequency lighting device 2), and the cumulative operating time is set in the non-volatile stored in the storage unit 7. Furthermore, the above-mentioned cumulative operating time when the lamp is replaced or when the lamp is reconnected is stored in the non-volatile storage unit 7 .

Furthermore, the fluorescent lamp 3 is connected to the high-frequency lighting device 2, and when the connection is detected by the lamp connection detection circuit 4, the dimming signal generation part 8 outputs the output power to the main control part 9 as shown in FIG. 2(b). 30% PWM dimming signal. The main control unit 9 changes the switching frequency of the field effect transistors FET1 and FET2 according to the PWM dimming signal. Thereby, the high-frequency voltage output to the inverter circuit 13 of the output terminals 14a, 14b, 15a, 15b changes, and as shown in FIG. 2(a), the fluorescent lamp 3 is turned on at an initial dimming level of 70%.

Furthermore, the dimming signal generator 8 decreases the power value of the PWM dimming signal for the aforementioned difference using a preset function after a preset life cycle of the fluorescent lamp 3 (for example, 12,000 hours). The main control unit 9 changes the switching frequency of the field effect transistors FET1 and FET2 according to the PWM dimming signal. Thereby, the dimming level of the fluorescent lamp 3 is increased according to the aforementioned difference from the initial dimming level of 70%.

Then, when the fluorescent lamp 3 reaches the end of its life and the lamp voltage rises, a life detection signal (permission signal) of the fluorescent lamp 3 is input from the life detection circuit 10 to the main control unit 9 . At this time, the main control unit 9 stops the switching operation of the field effect transistors FET1 and FET2 of the inverter circuit 13 and turns off the fluorescent lamp 3 . Alternatively, the main control unit 9 notifies the dimming signal generation unit 8 of the input of the detection signal. As shown in FIG. 2( b ), the dimming signal generation unit 8 outputs a PWM dimming signal of a power (30%) for the fluorescent lamp 3 to an initial dimming level (70%) to the main control unit 9 . As shown in FIG. 2( a ), the main control unit 9 lights the fluorescent lamp 3 at an initial dimming level of 70% based on the PWM dimming signal of the power level (30%). Thereby, the luminous flux emitted from the fluorescent lamp 3 is reduced.

The fluorescent lamp 3 has a decrease in light output (luminous flux) due to changes over time, and also a decrease in light output (luminous flux) due to dirt accompanying long-term use. However, by increasing the dimming level of the fluorescent lamp 3 according to the operating time of the high-frequency lighting device 2 as described above, the luminous flux decreased according to the lighting time of the fluorescent lamp 3 can be corrected, and within the lifetime of the fluorescent lamp 3 Inside, a substantially constant light beam is obtained from the fluorescent lamp 3 .

Moreover, in the middle of the life time (for example, 12,000 hours) of the fluorescent lamp 3, if the high-frequency lighting device 2 and the fluorescent lamp 3 become disconnected, and the high-frequency lighting device 2 and the fluorescent lamp 3 are connected again, the main control unit 9 will As shown in 2(b), the dimming signal generator 8 is controlled so that the fluorescent lamp 3 returns to the initial dimming level (70%). Then, under the control of the main control unit 9 , the dimming signal generation unit 8 outputs a PWM dimming signal to the main control unit 9 at a power (30%) for the fluorescent lamp 3 to an initial dimming level (70%). The main control unit 9 lights the fluorescent lamp 3 at an initial dimming level of 70% based on the PWM dimming signal from the dimming signal generating unit 8 as shown in FIG. 2( a ).

When the high-frequency lighting device 2 and the fluorescent lamp 3 are disconnected during the lifetime of the fluorescent lamp 3, for example, the fluorescent lamp 3 and the lighting fixture are cleaned. When cleaning the fluorescent lamp 3 and the lighting fixture, the dimming level of the fluorescent lamp 3 is set to the initial dimming level (70%) again, and the brightness set by the lighting fixture can also be ensured. Moreover, even if the dimming level of the fluorescent lamp 3 is increased based on the above-mentioned difference, the end of life can be detected by the life detection circuit 10 before the life time of the fluorescent lamp 3 (for example, 12000 hours), so the dimming level Flat may also not reach 100% (full light)

In addition, the life detection circuit 10 may add a detection circuit for detecting a half-wave voltage in addition to detecting the lamp voltage of the fluorescent lamp 3 . That is, the life detection circuit 10 may be configured to detect the end of the life of the fluorescent lamp 3 .

Moreover, when the discharge lamp lighting device 1 is replaced, or when the lighting fixture is replaced, by reading the accumulated operating time of the inverter circuit 13 stored in the non-volatile storage unit 7, the inverter circuit 13 can be obtained. cumulative operating time. Furthermore, the history of the fluorescent lamp 3 can be obtained by reading the accumulated operating time of the inverter circuit 13 when the lamp is replaced. Using this history, the actual life time of each fluorescent lamp 3 can be grasped.

In addition, the dimming signal generation part 8 can also be used as shown in FIG. PWM dimming signal with a rate of 70%, and according to the cumulative operating time of the inverter circuit 13 and the difference between the aforementioned cumulative actions when the latest lamp is replaced, the power level value is increased, and the dimming signal reaches the life time of the fluorescent lamp 3 When the level is 100% (full light), the output power is 100% PWM dimming signal.

Moreover, the main control unit 9 can also adopt the method as shown in FIG. Flat 100% (full light), a configuration that increases based on the above-mentioned difference.

The PWM dimming signal output from the dimming signal generation part 8 to the main control part 9 is an output voltage that gradually increases from the initial dimming level (70%) of the fluorescent lamp 3 to the dimming level 100% (full light). Since the control unit 9 forms a control signal for increasing the DC voltage, the connection circuit between the main control unit 9 and the dimming signal generation unit 8 can be simplified. That is, as shown in FIG. 2 , for the PWM dimming signal of the output voltage gradually decreasing from the initial dimming level (70%) of the fluorescent lamp 3 to the dimming level 100% (full light), when the main control unit 9 forms In the case of a control signal for increasing the DC voltage, for example, an inversion circuit of the aforementioned output voltage is required, which complicates the circuit configuration.

And the main control part 9 also can replace the accumulative operating time of the inverter circuit 13, and make the counting part 6 count the accumulative lighting time of all the fluorescent lamps 3 connected with the high-frequency lighting device 2, and store them in the non-volatile memory. stored in section 7. The counting of the cumulative lighting time of the fluorescent lamp 3 can be performed, for example, when the main control unit 9 switches the field effect transistors FET1 and FET2 and the life detection circuit 10 does not output an enable signal. Furthermore, it may be performed when the light output of the fluorescent lamp 3 is detected by the light sensor, and the light output of the fluorescent lamp 3 is detected by the light sensor.

Furthermore, the dimming signal generator 8 may generate the dimming signal based on the difference between the cumulative lighting time of the fluorescent lamp 3 and the cumulative lighting time at the latest lamp replacement. Also in this case, the same action and effect as when integrating the operating time of the inverter circuit 13 can be obtained.

Next, a discharge lamp lighting device according to a second embodiment of the present invention will be described with reference to the drawings. In addition, the same code|symbol is attached|subjected to the component which is the same as or equivalent to 1st Embodiment, and the description is abbreviate|omitted.

Fig. 4 is a block diagram including a partial circuit diagram of a discharge lamp lighting device according to a second embodiment of the present invention. In the figure, first, the composition of the lamp connection detection circuit 4 includes a resistor R3, an inductor L1 for current limiting and resonance, a filament electrode 3a of the fluorescent lamp 3, a resistor R4, a filament electrode 3b, a resistor R10, a bipolar transistor Tr10, a resistor R11 and the main control unit 9.

Moreover, if the fluorescent lamp 3 is connected to the output terminals 14a, 14b, 15a, 15b of the high-frequency lighting device 2, a current flows through the above-mentioned circuit, and a voltage is generated at the base of the bipolar transistor Tr10, so the bipolar transistor Tr10 is turned on. , and the lamp connection detection circuit 4 can judge that the lamp is connected. On the other hand, if the fluorescent lamp 3 is removed from one of the output terminals 14a, 14b, 15a, and 15b of the high-frequency lighting device 2, no current will flow, so the bipolar transistor Tr10 is turned off, and the lamp connection detection The circuit can determine that the lamp is not connected.

Next, the configuration of the life detection circuit 10 includes: a resistor R12 , a capacitor C11 , a resistor R13 and a main control unit 9 . When the fluorescent lamp 3 performs half-wave discharge, the capacitor C11 is charged through the resistor R12. Utilizing the orientation of the half-wave discharge, the voltage of the capacitor C11 is moved up and down. In the main control unit 9, it is observed whether the voltage is within the set range, and if it deviates from the set range, it is judged as the life of the fluorescent lamp 3 due to half-wave discharge or the like. In addition, the control content including other circuit operations is the same as that of the discharge lamp lighting device of the first embodiment, and the description thereof will be omitted.

Next, a third embodiment of the present invention will be described.

Fig. 5 is an external view of a lighting fixture according to a third embodiment of the present invention. In addition, the same code|symbol is attached|subjected to the same part as FIG. 1, and description is abbreviate|omitted.

The lighting fixture 17 shown in FIG. 5 is a directly mounted lighting fixture installed on a structure such as a ceiling, and the lighting fixture main body 18 is directly mounted on the structure. The lighting fixture main body 18 is provided with a housing 19 having a reflective surface 19a, and a pair of lamp sockets 20, 20 are provided at both ends thereof. Furthermore, the lighting fixture main body 18 is provided with a lighting device 21 for a discharge lamp in a housing 19 . The lighting device 21 for a discharge lamp is a lighting device in which the fluorescent lamp 3 is removed from the lighting device 1 for a discharge lamp shown in FIG. 1 . Furthermore, the fluorescent lamp 3 is mounted on the lamp sockets 20 , 20 .

In order to cope with the reduction of the light output (beam) due to the change over time of the fluorescent lamp 3 and the decrease of the light output (beam) due to the dirt accompanying long-term use, and the dirt of the cover 19 The low reflection efficiency is corrected so that the dimming level of the fluorescent lamp 3 is within the range of the life time (12000 hours), from the initial dimming level (70%) to 100% (full light), according to the time from when the lamp is replaced Since the operating time of the inverter circuit 13 is increased, the lighting fixture 17 can illuminate with substantially constant brightness.

And when the fluorescent lamp 3 reaches the end of life, the life of the fluorescent lamp 3 is detected by the life detection circuit 10, and the fluorescent lamp is turned off or the fluorescent lamp 3 is controlled at the initial dimming level (70%), so the lighting fixture 17 is turned off, Alternatively, the life of the fluorescent lamp 3 is notified by dimming the light generated by the lighting fixture 17 . Thereby, the fluorescent lamp 3 can be replaced rapidly.

Moreover, if the fluorescent lamp 3 and the lighting fixture 17 are cleaned before the life time of the fluorescent lamp 3, the dimming level of the fluorescent lamp 3 is controlled to the initial dimming level (70%), so the lighting fixture 17 can be set. A certain brightness, and can seek power saving.

Furthermore, when the lighting device 17 is replaced with the lighting device 21 for the discharge lamp, or when the lighting device 17 itself is discarded, the inverter circuit 13 (high-frequency lighting device 2) stored in the non-volatile storage unit 7 can be read out. The cumulative operating time of the inverter circuit 13 (high-frequency lighting device 2) can be used to obtain the life time and actual use time. Furthermore, by reading out the cumulative operating time of the inverter circuit 13 at the time of lamp replacement, the historical records of the fluorescent lamps 3 can be obtained, and the actual life time of each fluorescent lamp 3 can be grasped.

Claims (5)

1. discharge lamp ignition device is characterized in that it comprises:

The high-frequency lighting device is paid with energy discharge lamp;

Time set is to adding up operate time of high-frequency lighting device timing;

Non-volatile memory, store the accumulative total operate time of the high-frequency lighting device that utilizes the timing of time set accumulative total and the accumulative total operate time of the high-frequency lighting device when each lamp changed, stored and preserved, and output, read and the aforementioned historical record of accumulative total operate time of high-frequency lighting device when obtaining accumulative total operate time of high-frequency lighting device of aforementioned storage and lamp that aforementioned storage is preserved and changing as historical record;

The dim signal generating apparatus, generates dim signal at the accumulative total operate time when changing according to aforementioned accumulative total operate time and up-to-date lamp; And

Control device is controlled the high-frequency lighting device according to aforementioned dim signal;

Aforementioned historical record when wherein changing by the each lamp that is stored in aforementioned non-volatile memory, and grasp aforementioned discharge lamp time actual life.

2. discharge lamp ignition device is characterized in that it comprises:

The high-frequency lighting device is paid with energy discharge lamp;

Time set is to adding up operate time of high-frequency lighting device timing;

Nonvolatile storage device, store the accumulative total operate time of the high-frequency lighting device that utilizes the timing of time set accumulative total, and the accumulative total operate time of the high-frequency lighting device when each lamp is changed, stored and preserved, and output, read and the aforementioned historical record of accumulative total operate time of high-frequency lighting device when obtaining accumulative total operate time of high-frequency lighting device of aforementioned storage and lamp that aforementioned storage is preserved and changing as historical record;

The dim signal generating apparatus, the difference of the accumulative total operate time when calculating aforementioned accumulative total operate time and up-to-date lamp and changing, and generate dim signal according to this difference; And

Control device, the control device that the aforementioned dim signal of foundation is controlled the high-frequency lighting device;

Aforementioned historical record when wherein changing by the each lamp that is stored in aforementioned non-volatile memory, and grasp aforementioned discharge lamp time actual life.

3. discharge lamp ignition device according to claim 2, it is characterized in that: the dim signal generating apparatus replenishes for the light beam that the lighting a lamp the time of foundation discharge lamp reduced, and generate dim signal according to aforementioned difference, so that the light modulation level of discharge lamp increases from initial light modulation level.

4. discharge lamp ignition device according to claim 2, comprise the lamp joint detection device that the connection status to high-frequency lighting device and discharge lamp detects, it is characterized in that: when lamp joint detection device detects high-frequency lighting device and discharge lamp disconnected, the accumulative total operate time when making the accumulative total of the high-frequency lighting device that utilizes time set to add up timing be set at up-to-date lamp operate time to change.

5. ligthing paraphernalia is characterized in that it comprises:

The described discharge lamp ignition device of in the claim 1 to 4 each; And

Be provided with the ligthing paraphernalia main body of this discharge lamp ignition device.

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