JP2004349208A - Discharge lamp lighting device and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device in which un-equipping of a discharge lamp can be detected surely even in such a condition that a power supply is not switched on. <P>SOLUTION: If it becomes a state of un-equipping by removing a fluorescent lamp FL due to the last stage of lifetime or the like, and if a filament FL1b of the fluorescent lamp FL is removed, a voltage is generated at the contact point of a resistor R2 and a resistor R3. A gate voltage is applied to a field effect transistor Q4, the field effect transistor Q4 is switched on, and an electric double-layered capacitor C6 is discharged rapidly. When the voltage of the electric double-layered capacitor C6 is reduced, it becomes such a state that the voltage of a non-reversed input terminal becomes lower than the voltage of a reversed input terminal of a comparator 28 of a direct current power supply E1 for comparison, output of the comparator 28 is not made, and it is outputted to a microcomputer 24, and a lighting time of the fluorescent lamp FL accumulated in E<SP>2</SP>PROM27 is reset. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a discharge lamp lighting device and a lighting device that integrate a lighting time of a discharge lamp.
[0002]
[Prior art]
Conventionally, an inverter circuit serving as a discharge lamp lighting means is connected to a commercial AC power supply, and the discharge lamp is lit by the inverter circuit. In addition, a commercial AC power supply is converted to a DC power supply, the lighting time of the discharge lamp is integrated, the output of the inverter circuit is increased according to the lighting time, the luminous flux of the discharge lamp is increased, and the discharge lamp is deteriorated over time. Is corrected to make the light flux constant.
[0003]
Further, a mounting detection unit for detecting whether or not the discharge lamp is mounted is provided, and when the discharge lamp is removed, the integrated lighting time of the discharge lamp is reset (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2001-15276 A (pages 4-6, 8-9 and FIG. 16)
[0005]
[Problems to be solved by the invention]
However, the replacement of a fluorescent lamp at the end of its life or at the end of its life is generally performed with the power turned off, but the above-described conventional discharge lamp lighting device discharges when the power is not connected. Even if the lamp is removed, the mounting detection means does not operate, so the replacement time of the discharge lamp in the state where the power is not turned on cannot be reset and the power supply is turned on after the replacement of the fluorescent lamp and the integration time is reset. There is a problem that operation is required.
[0006]
The present invention has been made in view of the above problems, and has as its object to provide a discharge lamp lighting device and a lighting device that can easily reset the integrated lighting time of a discharge lamp even when the power is not turned on.
[0007]
[Means for Solving the Problems]
A discharge lamp lighting device according to claim 1, wherein: a discharge lamp lighting means for lighting the discharge lamp using a commercial AC power supply; a lighting detection means for detecting lighting of the discharge lamp; a lighting time detected by the lighting detection means. Lighting time integrating means for integrating the discharge lamp; mounting detection means for detecting the mounting of the discharge lamp; a capacitor; charging the capacitor when the discharge lamp is lit according to the detection state by the lighting detecting means; Control means for discharging the capacitor when the discharge lamp is not mounted according to the detected mounting state and resetting the integration time by the lighting time integration means by the voltage of the capacitor, wherein the discharge lamp lighting means controls the discharge lamp. When the lamp is turned on and the lighting detection unit detects the lighting of the discharge lamp, the lighting time integration unit integrates the lighting time and charges the capacitor. The control means discharges the capacitor when the discharge lamp is not mounted, and resets the integration of the lighting time integration means based on the capacitor voltage. Can be reset to
[0008]
The discharge lamp lighting device according to claim 2 is the discharge lamp lighting device according to claim 1, wherein the mounting detection means operates using a capacitor as a power supply when detecting non-mounting, the commercial AC power supply is turned off, and the discharge lamp is turned off. In the mounted state, the discharge of the capacitor is suppressed and the voltage of the capacitor is maintained.The mounting detection means operates using the capacitor as a power supply, so even if the commercial AC power is not turned on, the detection of lamp non-mounting is detected. In addition to being simple, the discharge of the capacitor when the discharge lamp is mounted can be suppressed.
[0009]
The discharge lamp lighting device according to claim 3 is the discharge lamp lighting device according to claim 1 or 2, wherein the capacitor is an electric double layer capacitor, and detects a mounted state of the discharge lamp when the commercial AC power is off. Can be maintained for a long time.
[0010]
A discharge lamp lighting device according to a fourth aspect is the discharge lamp lighting device according to any one of the first to third aspects, wherein the control means controls the discharge lamp lighting means according to the integration time by the lighting time integration means to adjust the discharge lamp. Light is lit, so that even if the discharge lamp deteriorates with time, for example, the luminous flux can be kept constant regardless of the passage of time.
[0011]
A lighting device according to a fifth aspect of the present invention includes the discharge lamp lighting device according to any one of the first to fourth aspects, and a fixture main body to which a discharge lamp to be lighted by the discharge lamp lighting device is mounted. It works.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a lighting device of the present invention will be described with reference to the drawings.
[0013]
FIG. 2 is a perspective view showing the appearance of the lighting device. As shown in FIG. 2, the lighting device 1 has a fixture main body 2, and the fixture main body 2 has a reflecting surface 3 formed on the lower surface. Lamp sockets 4 and 4 are attached to both ends of the lamp, and a fluorescent lamp FL as a straight tubular discharge lamp is attached between the lamp sockets 4 and 4. Further, a light emitting diode LED1 for notifying the end of life or the like is mounted on the appliance body 2, and a discharge lamp lighting device 6 is housed inside.
[0014]
FIG. 1 is a circuit diagram showing a discharge lamp lighting device. The discharge lamp lighting device 6 is connected to a commercial AC power supply e via a filter circuit 11 to an input terminal of a diode bridge 12 as a full-wave rectifier circuit. A capacitor C1 is connected between the output terminals of the diode bridge 12.
[0015]
The discharge lamp lighting means 15 is connected to the capacitor C1. In this discharge lamp lighting means 15, a half-bridge type inverter circuit 17 is cascade-connected to a step-up chopper circuit 16 as a pre-regulator circuit for power factor improvement. In the step-up chopper circuit 16, a series circuit of an inductor L1 and a field-effect transistor Q1 as a switching element is connected to a capacitor C1, and a series circuit of a diode D1 and a smoothing capacitor C2 is connected to the field-effect transistor Q1. The inverter circuit 17 is connected to C2. In the inverter circuit 17, a series circuit of a field effect transistor Q2 and a field effect transistor Q3 is connected to the capacitor C2, and the filament of the fluorescent lamp FL is connected to the field effect transistor Q3 via an inductor L2 and a DC cut capacitor C3. It is connected to one end of each of FL1a and filament FL1b. Further, a starting capacitor C4 is connected to the other end of each of the filament FL1a and the filament FL1b of the fluorescent lamp FL. The field effect transistor Q1 of the step-up chopper circuit 16 and the field effect transistor Q2 and the field effect transistor Q3 of the inverter circuit 17 are controlled by the control means 18 to control either the output of the step-up chopper circuit 16 or the output of the inverter circuit 17. The light output of the fluorescent lamp FL is changed by controlling one or both of them.
[0016]
Further, there are provided lighting detection means 21 for detecting lighting of the fluorescent lamp FL, and mounting detection means 22 for detecting mounting of the fluorescent lamp FL.
[0017]
Further, the control means 18 has a control section 23 for controlling the drive of the field effect transistor Q1 of the boost chopper circuit 16 and for controlling the field effect transistor Q2 and the field effect transistor Q3 of the inverter circuit 17; 23 is controlled by a microcomputer 24.
[0018]
The microcomputer 24 is connected to a lighting time integrating means 25. The lighting time integrating means 25 includes a timer circuit 26 for counting the lighting time and E ² as a memory for integrating and storing the time counted by the timer circuit 26. It has a PROM 27.
[0019]
Further, the microcomputer 24 is connected to the negative electrode of the diode bridge 12 via a series circuit of the light emitting diode LED1 and the resistor R1.
[0020]
On the other hand, a series circuit of a resistor R2 and a resistor R3 is connected between one end and the other end of the filament FL1b of the fluorescent lamp FL. The connection point between the resistors R2 and R3 is connected to the gate of the field effect transistor Q4, and the drain of this field effect transistor Q4 is connected to the connection point between the capacitor C4 and the resistor R2 via a series circuit of the resistors R4 and R5. Have been. Further, a capacitor C5 is connected in parallel with the resistor R3.
[0021]
An electric double layer capacitor C6 is connected in parallel with the series circuit of the resistor R5 and the field effect transistor Q4. The electric double-layer capacitor C6 uses an electrolytic solution of an organic solvent between electrodes of activated carbon, and has an electric distribution in which positive and negative are relatively distributed at a very short distance from the interface where the electrode of activated carbon comes into contact with the electrolytic solution. A double layer is formed. This electric double layer is used as a dielectric and is charged and discharged by physical adsorption and desorption, so that it hardly deteriorates and its life is semipermanent. In addition, since the physical movement of ions is much faster in such physical adsorption and desorption than in chemical change, rapid charge and discharge can be performed. For this reason, the capacity per unit volume is increased, and the capacity of about 10 ⁻² F to about 10 ³ F enables the number of times of charge and discharge to be 100,000 or more.
[0022]
The electric double layer capacitor C6 is connected to the power supply Vcc via the diode D2 and the resistor R6. Further, a field effect transistor Q5 is connected in parallel with the diode D2 and the electric double layer capacitor C6, and the gate of the field effect transistor Q5 is connected to the microcomputer 24.
[0023]
Further, a zener diode ZD1 is connected in parallel with the electric double layer capacitor C6, and a connection point between the diode D2 and the electric double layer capacitor C6 is connected to a non-inverting input terminal of a comparator 28 via a resistor R7. Is connected to the inverting input terminal, and the output terminal is connected to the microcomputer 24.
[0024]
Next, the operation of the above embodiment will be described.
[0025]
The voltage of the commercial AC power supply e is full-wave rectified by the diode bridge 12, smoothed by the capacitor C 1, improved in power factor by the boost chopper circuit 16 and boosted, and inversely converted to high-frequency AC by the inverter circuit 17 to change the fluorescent lamp FL. Turn on high frequency.
[0026]
At this time, the lighting detection means 21 detects the lighting of the fluorescent lamp FL, and when the fluorescent lamp FL is turned on, the microcomputer 24 measures the time by the timer circuit 26 and stores the integrated lighting time in the E ² PROM 27. When the fluorescent lamp FL is replaced and the fluorescent lamp FL is new, the controller 23 controls the field effect transistor Q1 of the boosting chopper circuit 16 and the inverter circuit 17 so that the microcomputer 24 controls the dimming of the fluorescent lamp FL. One or both of the field effect transistor Q2 and the field effect transistor Q3 are controlled. By this dimming control, the luminous flux of the fluorescent lamp FL is reduced to automatically correct an excessively bright initial state of the fluorescent lamp FL, and the power is reduced to save energy.
[0027]
Thereafter, the microcomputer 24 controls the control unit 23 by using the fluorescent lamp FL over time corresponding to the integration time of the E ² PROM 27 to reduce the dimming amount of the fluorescent lamp FL and reduce the luminous flux of the fluorescent lamp FL. Increase over time. The dimming compensates for the deterioration with time of the fluorescent lamp FL, so that the luminous flux is kept constant from the beginning of the fluorescent lamp FL.
[0028]
Further, when the lighting time of the fluorescent lamp FL integrated in the E ² PROM 27 exceeds a predetermined time, that is, when the fluorescent lamp FL reaches the end of life or approaches the end of life, the microcomputer 24 controls the control unit 23 to control the fluorescent lamp FL. Is adjusted to the lower limit level to reduce the luminous flux of the fluorescent lamp FL. In this state, the light emitting diode LED1 is turned on by the microcomputer 24 to notify that the end of life is approaching.
[0029]
When the fluorescent lamp FL is mounted, a series circuit of the resistor R2 and the resistor R3 is connected via one end and the other end of the filament FL1b of the fluorescent lamp FL. When no gate voltage is applied to the gate, the field effect transistor Q4 maintains the off state, and when the lighting is detected by the lighting detection means 21, the microcomputer 24 applies the gate voltage to the gate of the field effect transistor Q5. Since no voltage is applied, the field effect transistor Q5 also maintains the off state, and the electric double layer capacitor C6 is charged by the power supply Vcc. Then, the voltage of the electric double layer capacitor C6 becomes equal to or higher than a predetermined value, and the voltage of the non-inverting input terminal becomes higher than the voltage of the inverting input terminal of the comparator 28 of the DC power supply E1 for comparison. Normal state.
[0030]
By the way, when the fluorescent lamp FL is detached at the end of life or the like and the filament FL1b of the fluorescent lamp FL comes off, a voltage is generated at a connection point between the resistors R2 and R3, and a gate voltage is applied to the gate of the field effect transistor Q4, so that the electric field effect is reduced. The transistor Q4 turns on and rapidly discharges the electric double layer capacitor C6. When the voltage of the electric double layer capacitor C6 decreases, the voltage of the non-inverting input terminal of the comparator 28 of the DC power supply E1 for comparison becomes lower than the voltage of the non-inverting input terminal. 24, and resets the lighting time of the fluorescent lamp FL integrated in the E ² PROM 27. In general, when replacing the fluorescent lamp FL, the power is often turned off. However, even if the fluorescent lamp FL is removed while the power is off, the fluorescent lamp FL can be replaced with the electric double layer capacitor C6 as a power supply. The non-attachment is detected, and the electric double layer capacitor C6 is discharged. When the commercial AC power supply e is turned off and the fluorescent lamp FL is mounted, the field-effect transistor Q4 is kept off to suppress the discharge of the electric double layer capacitor C6 and maintain the voltage of the electric double layer capacitor C6. I have.
[0031]
Further, even if a new fluorescent lamp FL is mounted when the power is turned off, the electric double layer capacitor C6 is not charged, so that the voltage of the electric double layer capacitor C6 remains low.
[0032]
Further, when the commercial AC power supply e is turned on again, the output of the comparator 28 becomes an inverted output because the voltage of the electric double layer capacitor C6 has decreased, and the microcomputer 24 detects the output of the comparator 28 and integrates it in the E ² PROM 27. The lighting time of the fluorescent lamp FL thus reset is reset.
[0033]
【The invention's effect】
According to the discharge lamp lighting device of the first aspect, when lighting of the discharge lamp is detected by the lighting detection means, the lighting time integrating means accumulates the lighting time and charges the capacitor, and the control means determines whether the discharge lamp is not mounted. In this state, the capacitor is discharged, and the integration of the lighting time integrating means is reset based on the capacitor voltage. Therefore, the non-attachment of the discharge lamp can be reliably detected, and the integrated time of the discharge lamp can be easily reset.
[0034]
According to the discharge lamp lighting device of the second aspect, in addition to the discharge lamp lighting device of the first aspect, the mounting detection means operates using a capacitor as a power supply, so that even if the commercial AC power is not turned on, the lamp is not turned on. The mounting can be easily detected, and the discharge of the capacitor when the discharge lamp is mounted can be suppressed.
[0035]
According to the discharge lamp lighting device of the third aspect, in addition to the discharge lamp lighting device of the first or second aspect, since the capacitor is an electric double layer capacitor, detection of the mounted state of the discharge lamp when the commercial AC power is off. Can be maintained for a long time.
[0036]
According to the discharge lamp lighting device of the fourth aspect, in addition to the discharge lamp lighting device of any one of the first to third aspects, even if the discharge lamp deteriorates with time, for example, the luminous flux can be made constant regardless of the passage of time.
[0037]
According to the illuminating device of the fifth aspect, since there is provided the fixture main body to which the discharge lamp lit by the discharge lamp lighting device of any one of the first to fourth aspects is mounted, each effect can be obtained.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing one embodiment of a discharge lamp lighting device according to the present invention.
FIG. 2 is a perspective view showing an appearance of the lighting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Illumination apparatus 2 Fixture main body 6 Discharge lamp lighting device 15 Discharge lamp lighting means 18 Control means 21 Lighting detection means 22 Mounting detection means 25 Lighting time integrating means C6 Electric double layer capacitor FL Fluorescent lamp e as discharge lamp e Commercial AC power supply

Claims (5)

Discharge lamp lighting means for lighting the discharge lamp using a commercial AC power supply as a power supply;
Lighting detection means for detecting lighting of the discharge lamp;
Lighting time integrating means for integrating the lighting time detected by the lighting detecting means;
Mounting detection means for detecting mounting of the discharge lamp;
A capacitor;
According to the detection state by the lighting detection means, the capacitor is charged when the discharge lamp is lit, and according to the mounting state detected by the mounting detection means, the capacitor is discharged when the discharge lamp is not mounted and lit by the voltage of the capacitor. Control means for resetting the integration time by the time integration means;
A discharge lamp lighting device comprising: The mounting detection means operates using a capacitor as a power supply when detecting non-mounting, and suppresses discharge of the capacitor when the commercial AC power supply is turned off and the discharge lamp is mounted, thereby maintaining the voltage of the capacitor. The discharge lamp lighting device according to claim 1. The discharge lamp lighting device according to claim 1, wherein the capacitor is an electric double layer capacitor. The discharge lamp lighting device according to any one of claims 1 to 3, wherein the control means controls the discharge lamp lighting means according to the integration time by the lighting time integration means to perform dimming lighting of the discharge lamp. A discharge lamp lighting device according to any one of claims 1 to 4, and
An appliance body on which a discharge lamp to be lit by the discharge lamp lighting device is mounted;
A lighting device, comprising:

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