JP4736464B2 - Lighting device, lighting apparatus, and lighting system - Google Patents

Description

  The present invention relates to a lighting device that lights at least a light source that outputs light as a load, and a technique related to a lighting fixture and a lighting system including the lighting device and the light source.

  It has been a long time since lighting fixtures using fluorescent lamps and HID lamps have been used. When using the luminaire, it is easy for the user to know that the lamp has reached the end of its life, such as it will not turn on when the lamp reaches the end of its life, it will be difficult to turn on, or the conventional brightness will not come out. become.

  On the other hand, the luminaire itself has a useful life, that is, a so-called life. It appears due to fatigue of metal parts, oxidation, deterioration of plastic parts, discoloration, breakage, deterioration of parts constituting the ballast, reduction of insulation resistance, and the like. Nevertheless, when the lamp is lit normally, the user generally keeps using it without noticing the life of the lighting fixture.

  Disadvantages when used beyond the service life are not only that the proper performance as a lighting fixture cannot be obtained, but there is a risk of causing unsafe conditions such as breakage and dropping of the fixture depending on the deteriorated part.

  General electronic devices, such as televisions, are subject to various types of degradation, and the performance of the television, such as image blurring, color changes, and sound malfunctions, makes it relatively easy to see changes from the beginning, and the devices deteriorate. It is easy to guess that

  On the other hand, since the main function of the luminaire is to properly shine the lamp and illuminate the object, there is a current situation that the degree of deterioration of the luminaire is difficult to understand. For this reason, it is very difficult for the user to understand the deterioration of the appliance, and a lighting fixture having a useful life of, for example, 10 years may continue to be used for more than 10 years, and in some cases for more than several decades.

  As means for determining the lifetime of the lighting device, there are JP-A Nos. 2001-185374 and 2004-259533. These inventions disclose the idea that the discharge lamp lighting time is cumulatively counted and the life is determined by exceeding a predetermined time. In addition, the idea of correcting the integrated count value in consideration of the temperature of a component with a limited life is also disclosed.

  However, the lifespan of the luminaire greatly increases depending on the use environment, and it cannot be said that the accurate lifespan is determined simply by counting the cumulative lighting time. In other words, if the appliance life is determined only by the cumulative lighting time due to the difference in the usage environment, etc., it is determined that the component has a failure before it is determined to be the appliance life, or conversely, it is determined that it has not reached the appliance life. Therefore, there is a possibility that the life judgment accuracy cannot be maintained. Further, there is no specific disclosure about the notification method after the life determination.

Moreover, although it is not a lighting fixture, as a prior art example which discriminate | determines a lifetime by detecting the characteristic change of the capacitor | condenser contained in an electronic block, Unexamined-Japanese-Patent No. 7-222436, Unexamined-Japanese-Patent No. 8-80055, patent No. 3324239, etc. is there. However, compared to the electronic blocks shown in these conventional examples, lighting fixtures are technically more difficult in that they are used in a wide range of environments, such as indoors and outdoors. It is considered different.
JP 2001-185374 A JP 2004-259533 A JP-A-7-222436 JP-A-8-80055 Japanese Patent No. 3324239

  The current form of lighting fixtures is not easily read by the user that the lifetime has come. Therefore, there is a demand for means that does not cause an unsafe state due to the life of the lighting fixture.

  This invention is made | formed in view of such a condition, and makes it a subject to provide the means to discriminate | determine the lifetime of the lighting device which comprises a lighting fixture.

In the lighting device of the present invention, in order to solve the above problem, as shown in FIG. 9 , at least the lighting device 1 that turns on the light source La that outputs light as a load is used together with the usage time of the lighting device 1. Parts whose characteristics change ( voltage response type two-terminal switching element Q ), detection means for detecting the characteristics of the lighting device 1 that changes due to the change in the characteristics, and the lifetime of the lighting device 1 based on the detection result A discrimination circuit 5 and a start circuit 3 for applying a higher voltage to the light source La than at the time of stable lighting at the start to start the light source La are provided, and the detection means detects the high voltage. is there.

  According to the present invention, in a lighting device that lights at least a light source that outputs light as a load, or a lighting device that includes the lighting device, or a lighting system that is a combination of the lighting devices, the lifetime of the lighting device is determined. It is possible to properly use a lighting fixture equipped with the same and a lighting system combining these.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described. Embodiment 6 and Embodiments 14 and 15, which will be described later, are embodiments corresponding to the present invention, and other embodiments are the premise of the present invention. Or it demonstrates as an additional structure.
(Embodiment 1)
1 and 2 show a first embodiment of the present invention. In the figure, Vs is an AC power source, La is a lamp as a light source, 1 is a lighting device, 2 is a rectifier circuit, 3 is a lighting circuit, 4 is a voltage detection circuit, 5 is a life determination circuit, 6 is a timer, and 7 is a comparison determination. Circuit. In the present embodiment, the capacity of the capacitor C1 in the lighting device 1 is reduced at the end of the life of the lighting device 1, so that the life of the lighting device 1 is reduced by detecting that the charge / discharge time is shorter than the initial time. It can be discriminated.

  FIG. 2 shows changes in the voltage Vdc across the capacitor C1 when the power is turned on and when the power is turned off. The voltage Vdc across the capacitor C1 is detected by the voltage detection circuit 4, and the time required for charging / discharging between the predetermined voltages V1 and V2 is measured by the timer 6.

  Since the capacity of the capacitor C1 is sufficient at the beginning of use of the lighting device 1, the charge / discharge time is sufficiently long as T0 as shown by the solid line in FIG. 2, but at the end of the life of the lighting device 1, the capacity of the capacitor C1. As a result of the decrease, the charge / discharge time is shortened to Ta as shown by the chain line in FIG. In view of this, the life determination reference value Tref is set in advance between the charge and discharge times T0 to Ta, and the comparison can be performed by the comparison determination circuit 7. Needless to say, when the charging time and the discharging time are different, a life criterion value may be set for each.

  In the present embodiment, the method of determining the life is when the power is turned on and when the power is turned off. However, a switching element is provided at both ends of the capacitor C1, and the switching element is turned on / off according to an external signal. You may make it perform lifetime discrimination | determination at a desired time.

  According to this embodiment, the lifetime of the lighting device can be determined from the charge / discharge time of the capacitor in the lighting device at the end of the lifetime of the lighting device.

(Embodiment 2)
3 and 4 show a second embodiment of the present invention. In the present embodiment, when the capacitance of the capacitor C1 in the lighting device 1 decreases at the end of the life of the lighting device 1, it is detected that the ripple component included in the voltage Vdc at both ends thereof becomes larger than the initial value. It is designed to be able to determine the lifespan.

  FIG. 4A shows an enlarged view of the ripple component included in the voltage Vdc across the capacitor C1. The voltage detection circuit 4 detects the voltage Vdc across the capacitor C1, and the ripple detection circuit 8 detects whether or not a voltage lower than the predetermined voltage V3 is generated, and outputs as shown in FIGS. 4B and 4C. The signal is sent to the comparison discriminating circuit 7. Since the capacity of the capacitor C1 is sufficient in the initial use of the lighting device 1, the ripple component is not included so much as shown by the solid line in FIG. 4A, and Vdc does not fall below the predetermined voltage V3. The output signal of the circuit 8 is constant as shown in FIG. On the other hand, as the capacity of the capacitor C1 decreases at the end of the life of the lighting device 1, a large amount of ripple component is included in Vdc as shown by the chain line in FIG. 4A, and a voltage lower than the predetermined voltage V3 appears. The output signal of the ripple detection circuit 8 becomes a pulse signal as shown by the chain line in FIG. The pulse signal can be recognized by the comparison / discriminating circuit 7 to determine the life.

  In this embodiment, the voltage at both ends of the capacitor C1 is detected as a method for determining the life. However, the current flowing through the capacitor C1 is detected using a resistor, a current transformer, or the like, and the ripple component included in the current is used in the same manner. Lifespan discrimination can be performed.

  According to the present embodiment, the lifetime of the lighting device can be determined based on the ripple component included in the voltage across the capacitor in the lighting device and the current flowing in the capacitor at the end of the lifetime of the lighting device.

(Embodiment 3)
In the present embodiment, the capacity of the capacitor C1 in the lighting device 1 is reduced at the end of the life of the lighting device 1, or the loss tangent tan δ of the loss angle inside the capacitor C1 or the equivalent series resistance ESR is increased. And the life of the lighting device 1 can be determined.

  In this case, a temperature sensor element is attached directly or in the vicinity of the capacitor C1, and when this temperature detection value exceeds a predetermined temperature, it is determined that the service life is reached.

  In the present embodiment, the temperature sensor element may be anything such as a thermistor or a thermal IC as long as it can convert temperature into an electrical signal.

  According to this embodiment, the lifetime of the lighting device 1 can be determined based on the temperature of the capacitor C1 in the lighting device 1 at the end of the lifetime of the lighting device 1.

(Embodiment 4)
A fourth embodiment of the present invention will be described with reference to FIGS. The circuit of FIG. 5 is provided for AC power supply Vs, a switch SW that cuts off the AC power supply Vs, a rectifier circuit 2 that rectifies the AC power supply Vs, a capacitor C1 that smoothes the rectified voltage, and for life detection. Photocoupler 9, current source Is for supplying a constant current to the light emitting element of photocoupler 9, and conversion for voltage conversion of a current value obtained by multiplying the input forward current Is of photocoupler 9 by CTR (current transfer rate). A detection circuit composed of a resistor Rs, a determination circuit composed of a comparator 10 that determines the life from the voltage across the resistor Rs, a lighting circuit 3 that converts the power of the smoothing capacitor C1 into AC power, and a light source It consists of a lamp La.

  In the present embodiment, the discharge lamp lighting device is described. However, the life determination method of the present invention is not limited to the discharge lamp lighting device, and may be a lighting device that lights a light source (for example, an LED) that outputs light as a load. Can be anything.

  Hereinafter, life detection and life determination will be described in detail with reference to FIGS. 5 and 6. First, FIG. 6 shows the relationship of CTR (current transfer rate) with respect to the usage time of a general photocoupler. The horizontal axis is a logarithmic scale. From this graph, it can be seen that the CTR decreases with the use time. Therefore, as shown in FIG. 5, the photocoupler 9 is mounted in the product, and the change in the CTR of the photocoupler 9 is detected by converting it to the voltage value of the resistor Rs, and the reference voltage Vref set in advance is detected. By comparing, it is possible to detect the product life and to avoid defects in the product life.

  Further, as shown in FIG. 6, in the case of a photocoupler, since the way of changing CTR varies greatly depending on the operating ambient temperature, when the threshold value Vref of the determination circuit is set using a resistance voltage dividing circuit or the like, By using a temperature-dependent element (for example, a thermistor) as at least one of the piezoresistors, the influence of the use temperature on the life determination value can be reduced.

(Embodiment 5)
A fifth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the configuration is substantially the same as that in FIG. In FIG. 7, LED11 is used as a lifetime detection means. FIG. 8 shows a luminous flux decay characteristic of a general LED. As shown in FIG. 8, the luminous flux of the LED decreases with time of use. This characteristic is detected by, for example, a photodiode 12 as a light beam measuring means. The photocurrent detected by the photodiode 12 is subjected to current-voltage conversion by a resistor and amplified by an operational amplifier 13 to obtain a detection voltage Vo. When this detection voltage Vo becomes smaller than a predetermined voltage Vref set in advance, it is possible to determine by the comparator 10 that the product is at the end of its life, and to open the switch SW to avoid problems in the product life. .

(Embodiment 6)
9 and 10 show a sixth embodiment of the present invention. In the present embodiment, the voltage-responsive two-terminal switching element Q in the lighting device 1 detects that the on-voltage decreases at the end of the life of the lighting device 1 so that the life of the lighting device 1 can be determined. . In FIG. 9, when the capacitor C is charged by the charging circuit 3a and the charging voltage of the capacitor C reaches the ON voltage of the voltage response type two terminal switch element Q, the voltage response type two terminal switch element Q is turned ON, The charging voltage is discharged through the primary winding of the transformer PT. Due to the sudden discharge current flowing at this time, a voltage is generated in the secondary winding of the transformer PT. For example, when the light source La requires a high voltage at the start like a high pressure discharge lamp, the light source La is started using the high voltage generated in the secondary winding of the transformer PT. Although the above charge / discharge operation is repeated as shown in FIG. 10, it is known that the on-voltage of such a voltage-responsive two-terminal switch element Q gradually decreases according to the number of uses.

  FIG. 10 shows the change in the operation of this circuit due to this lifetime. As shown in the figure, when the on-voltage is initially Va, the time required for one charge is Ta, and charging / discharging is repeated with this Ta as a cycle. On the other hand, when the on-voltage becomes Vb at the end of the lifetime, the time required for one charge is Tb shorter than the initial Ta. Therefore, the change in the ON voltage or the change in the charging / discharging cycle can be detected by the comparison determination circuit 7 to determine the life of the lighting device 1.

  Further, as one of the phenomena at the end of the life of the voltage response type two-terminal switch element Q, there is a phenomenon in which the ON state continues once it is turned ON. In this case, as shown in FIG. 10, the charging / discharging cycle is Tc longer than the initial Ta, so that it is possible to determine the life of the lighting device 1 by detecting that this cycle has become longer.

  In the present embodiment, the voltage response type two-terminal switch element Q is generally a gap element such as a discharge gap, but may be a semiconductor element.

  According to this embodiment, it is possible to determine the life of the lighting device based on a change in the on-voltage or cycle of the voltage response type two-terminal switch element in the lighting device at the end of the life of the lighting device.

(Embodiment 7)
11 to 13 show a seventh embodiment of the present invention. In the present embodiment, the capacitance of the capacitor C2 in the lighting device 1 is reduced at the end of the lifetime of the lighting device 1, and the high frequency ripple component included in the current flowing through the inductor L2 is increased. The noise is detected by the sound sensor element S2, and the life of the lighting device 1 can be determined. FIG. 11B shows the configuration of the life discriminating circuit 5 inside the lighting circuit 3.

  Here, when the lamp current Ila is enlarged, although depending on the values of the capacitor C2 and the inductor L2, some high-frequency ripple components are included as shown in FIG. This high-frequency ripple component increases with the lifetime of the lighting device 1 as the capacitance of the capacitor C2 decreases as shown in FIGS. 12A to 12B, and increases the noise level of the inductor L2 as shown in FIG. Therefore, by arranging the sound sensor element S2 at a position where the noise value can be detected, it is possible to detect the output signal of the sound sensor element S2 as shown in FIG.

  In the present embodiment, the sound sensor element S2 may be any element that can convert sound into an electrical signal, such as an ultrasonic sensor, a micro amplifier built-in microphone, and a condenser microphone. The sound sensor element S2 may be directly attached to the inductor L2, or the attachment method is not limited as long as the sound sensor element S2 can be detected in the vicinity of the inductor L2 and can detect the noise level of the inductor L2.

  According to this embodiment, the lifetime of the lighting device can be determined from the noise level that increases in the lighting device at the end of the lifetime of the lighting device.

(Embodiment 8)
14 and 15 show an eighth embodiment of the present invention. In the present embodiment, similarly to the seventh embodiment, an increase in the ripple component included in the lamp current Ila at the end of the life of the lighting device 1 is detected by the optical sensor element S1 as the light output from the lamp La, and the life of the lighting device 1 is increased. It can be discriminated. As shown in the seventh embodiment, the high-frequency ripple component included in the lamp current Ila increases with the lifetime of the lighting device 1, and as a result, the same ripple component is also superimposed on the light output waveform of the lamp La. Therefore, this optical output is detected by the optical sensor element S1, and the increase level of the ripple is detected as an output signal of the optical sensor element S1, as shown in FIG.

  In the present embodiment, the optical sensor element S1 may be any element that can convert light into an electrical signal, such as CdS or a photodiode. Further, the optical sensor element S1 may be attached to the outer case of the lighting device 1, or only the terminal for electrical connection is provided from the lighting device 1, and the optical sensor element S1 is directly attached to an appliance or the like in the vicinity of the lamp La. The attachment method is not limited as long as the light output can be detected such as attachment.

  According to this embodiment, the lifetime of the lighting device can be determined from the ripple component of the lamp light output that increases at the end of the lifetime of the lighting device.

(Embodiment 9)
FIG. 16 shows the operation of the ninth embodiment of the present invention. As in the eighth embodiment, the present embodiment uses the optical sensor element S1 to detect the light output from the lamp La that decreases at the end of the lifetime of the lighting device 1 so that the lifetime of the lighting device 1 can be determined. Is. In the present embodiment, the circuit diagram is the same as that of FIG. 14 of the previous embodiment 8, and the same applies to the type and mounting method of the optical sensor element S1. In this embodiment, there is a possibility that the lamp connected as a load within the lifetime of the lighting device will reach the end of its life and the luminous flux may decrease, so the difference between the end of the lamp life and the end of the lifetime of the lighting device is clarified. It is necessary to keep.

  According to this embodiment, the lifetime of the lighting device can be determined from the lamp light output that decreases at the end of the lifetime of the lighting device.

(Embodiment 10)
In the configuration of FIG. 14 and the operation of FIG. 16, the present embodiment uses a temperature sensor element instead of the optical sensor element S <b> 1, and accompanies light output from the lamp La that decreases at the end of the life of the lighting device 1. A decrease in lamp temperature is detected so that the life of the lighting device 1 can be determined. In the present embodiment, the temperature sensor element may be any element such as a thermistor or a thermal IC as long as it can convert temperature into an electrical signal. In addition, the temperature sensor element may be attached to the case outline of the lighting device, or only the terminal for electrical connection is taken out from the lighting device, and the temperature sensor element is directly attached to the appliance in the vicinity of the lamp La, etc. If the temperature can be detected, the mounting method is not limited.

  According to this embodiment, the lifetime of the lighting device can be determined from the lamp temperature that decreases at the end of the lifetime of the lighting device.

(Embodiment 11)
A specific circuit diagram of the eleventh embodiment of the present invention is shown in FIG. A power switch SW that can select whether or not to supply the AC power supply Vs to the product by a switch operation, a rectifying circuit 2 that rectifies and smoothes the AC power supply Vs, a smoothing capacitor C1, and a DC voltage of the smoothing capacitor C1 to a desired voltage and current. The lighting circuit 3 that supplies power to the light source La that is a load, the filter capacitor Cf that removes noise components generated from the lighting circuit 3 and others, and the photocoupler 9 that detects the magnitude of the current flowing through the filter capacitor Cf The resistor Rs for converting the current flowing through the photocoupler 9 into a voltage, and a lifetime determining circuit including a comparator 10 for determining the lifetime of the product based on the magnitude of the voltage value of the resistor Rs. In general, noise components tend to increase with life. This is because, for example, the capacity of the electrolytic capacitor C1 for smoothing decreases with the lifetime, and as a result, the voltage ripple increases. As the voltage ripple increases, switching noise components such as switching elements increase. By such a series of operations, the current flowing through the noise removing capacitor Cf increases, and the current value on the light receiving element side of the phototransistor 9 also increases. As the current value increases, the voltage value of the resistor Rs also increases. The life of the product can be determined by comparing the increased voltage value with a predetermined voltage Vref set in advance.

Embodiment 12
A circuit diagram of Embodiment 12 of the present invention is shown in FIG. The lighting device 1 includes a lighting device 1 and a life determination circuit 5 including a microcomputer. The input voltage, input current, output voltage, and output current of the lighting device 1 are detected and input to the microcomputer input port. As specific detection means, for example, the voltage is detected by resistance voltage division, and the current is detected by a detection resistor or a current transformer. In the figure, 5a is a first multiplication means for calculating input power by multiplying an input voltage and an input current, 5b is a second multiplication means for calculating output power by multiplying an output voltage and an output current, and 5c is an input. Subtracting means for calculating a circuit loss by calculating a difference between power and output power. The predetermined set value 5e and the calculated circuit loss are compared by the comparison circuit 5d, and when the circuit loss exceeds the set value 5e, the lighting device 1 determines that the life has expired. If it does not exceed, it is not judged as a life. The output of the comparison circuit 5d is given to the lighting device 1 as a control signal, and operates to reduce or stop the output of the lighting device 1 at the end of its life.

(Embodiment 13)
In this embodiment, the circuit loss of the lighting device is detected using the temperature sensor element in the twelfth embodiment. That is, when the circuit loss of the lighting device increases, the loss becomes heat generation of the lighting device itself, and the temperature of a certain part in the lighting device or the whole lighting device rises, and this is detected using a temperature sensor element. It is. The operation after detection is the same as that in the twelfth embodiment.

(Embodiment 14)
A fourteenth embodiment is shown in FIGS. In the present embodiment, as shown in the sixth embodiment, when the light source La requires a high voltage at the time of starting like a high pressure discharge lamp, the high voltage detection circuit 14 supplies the high voltage actually applied to the light source La. The life of the lighting device 1 can be determined by detecting the change in the voltage value of the high voltage by the comparison determination circuit 7.

  The high voltage waveform changes as shown in FIG. 20 due to a decrease in the capacitance of the capacitor C, deterioration of the voltage response type two-terminal switching element Q, insulation deterioration of the transformer PT, etc. Therefore, the rise (Vc) or the decrease (Vb) is detected, so that the change can be determined by the comparison determination circuit 7 and the life of the lighting device 1 can be determined.

  In the present embodiment, as a means for detecting a change in the high voltage waveform, not only the voltage value is compared, but for example, an allowable range of the reference waveform of the voltage waveform is set, and the waveform is compared with the actual waveform. Thus, it may be determined that the lifetime is out of the allowable value. Further, as a method for detecting a high voltage, instead of directly detecting the high voltage, for example, a further winding may be added to the transformer PT, and the detection may be made from the voltage generated in the winding.

  According to this embodiment, the lifetime of the lighting device can be determined from the change in the high voltage waveform at the end of the lifetime of the lighting device.

(Embodiment 15)
A fifteenth embodiment is shown in FIGS. This embodiment forms a resonance circuit including an inductance element T3 and a capacitor C3 when the light source La requires a high voltage at the start-up as shown in the fourteenth embodiment, as in a high-pressure discharge lamp. In the lighting device 1 configured to apply a voltage higher than the stable lighting voltage generated by the resonance voltage to the light source La by applying an alternating voltage swept in the vicinity of the resonance frequency for a predetermined time and with a predetermined frequency variable width. As in the fourteenth embodiment, the high voltage applied to the light source La is detected by the high voltage detection circuit 14, and the change of the voltage value of the high voltage is determined by the comparison determination circuit 7, thereby enabling the lighting device 1 to This makes it possible to determine the lifetime.

  The high voltage waveform changes due to a decrease in the capacitance of the capacitor C3, insulation deterioration of the transformer T3, etc., as shown in FIG. 22, and the voltage value increases (Vc) or decreases (Vb This change can be detected by the comparison / discrimination circuit 7 to determine the life of the lighting device 1.

  In this embodiment, as a means for detecting a change in the high voltage waveform, not only the voltage value is compared, but for example, an allowable range of the reference waveform of the voltage waveform is set, and the waveform is compared with the actual waveform. Then, it may be determined that the lifetime is out of the allowable value. Further, as a method for detecting a high voltage, instead of directly detecting the high voltage, for example, a winding may be further added to the transformer T3 and detected from the voltage generated in the winding.

  According to this embodiment, the lifetime of the lighting device can be determined from the change in the high voltage waveform at the end of the lifetime of the lighting device.

(Embodiment 16)
In this embodiment, in the first to fifteenth embodiments, the life value is not determined based on a predetermined absolute value as a reference value for determining the life, but the initial value of the detected value is stored, and the initial value from the initial value is stored. The life is determined by the amount of change.

  According to the present embodiment, it is possible to determine the lifetime of the lighting device regardless of the initial variation of each detection value, which is effective.

(Embodiment 17)
A seventeenth embodiment is shown in FIGS. In the present embodiment, Vref, which is a lifetime determination reference value in the lifetime determination circuit 5 shown in the first to fifteenth embodiments, is generated by dividing the resistors R1 and R2 from the constant voltage Vcc in the circuit. By changing R2, the life time to be determined can be changed.

  Further, the resistors R2a, R2b, and R2c to be changed may be mounted on a printed board in advance, and the connection may be changed by changing a jumper line or the like, or may be changed by a dip switch or the like instead of the jumper line.

  Further, when the setting of Vref itself is set in an IC such as a microcomputer, it may be switched by changing a program in the microcomputer.

  As described above, according to the present embodiment, it is possible to freely set the determination condition for determining that the lighting device is at the end of its life, and it is possible to easily change it according to the application / model of the lighting device.

(Embodiment 18)
In this embodiment, the structure of the lighting fixture which mounts the lighting device as described in Embodiments 1 to 17 is exemplified. FIG. 25 is a front view of a general Fuji-type lighting fixture for two lamps capable of lighting two discharge lamps as a light source. In the figure, reference numerals 21 to 24 denote sockets, R denotes a reflector, and La1 and La2 denote discharge lamps. As the discharge lamp lighting device, one discharge lamp lighting device for two lamps or two discharge lamp lighting devices for one lamp are mounted in the instrument body.

(Embodiment 19)
FIG. 26 is an explanatory diagram showing the overall configuration of an illumination system according to Embodiment 19 of the present invention. In the present embodiment, a lighting system that collectively controls a plurality of lighting fixtures described in the eighteenth embodiment using a control device will be described. The lighting fixtures K-1 to K-12 described in the eighteenth embodiment are connected to a human body sensor and a control device S including a program-controllable system. In this embodiment, FHF32 is attached to the lighting fixtures K-1 to K-9 as a lamp load, and the light fixtures K-10 to K-11 on the window side where external light enters are lower than FHF32, but cost is low. A cheap FLR40 / 36 is installed. As a feature of the control device S, a discharge lamp is turned on when a person is detected by a human body sensor, and a function of turning off when a person is absent, an input of a load mounting state, lighting of an arbitrary lighting fixture, and setting of a lighting condition are set. It has a program control function that is possible. The control device S may also function as a display device that receives and displays a life determination signal from the life determination circuit of each of the lighting fixtures K-1 to K-12.

It is a circuit diagram of Embodiment 1 of the present invention. It is operation | movement explanatory drawing of Embodiment 1 of this invention. It is a circuit diagram of Embodiment 2 of the present invention. It is operation | movement explanatory drawing of Embodiment 2 of this invention. It is a circuit diagram of Embodiment 4 of the present invention. It is operation | movement explanatory drawing of Embodiment 4 of this invention. It is a circuit diagram of Embodiment 5 of the present invention. It is operation | movement explanatory drawing of Embodiment 5 of this invention. It is a circuit diagram of Embodiment 6 of the present invention. It is operation | movement explanatory drawing of Embodiment 6 of this invention. It is a circuit diagram of Embodiment 7 of the present invention. It is operation | movement explanatory drawing of Embodiment 7 of this invention. It is operation | movement explanatory drawing of Embodiment 7 of this invention. It is a circuit diagram of Embodiment 8 of the present invention. It is operation | movement explanatory drawing of Embodiment 8 of this invention. It is operation | movement explanatory drawing of Embodiment 9 of this invention. It is a circuit diagram of Embodiment 11 of the present invention. It is a circuit diagram of Embodiment 12 of the present invention. It is a circuit diagram of Embodiment 14 of the present invention. It is a wave form diagram for operation | movement description of Embodiment 14 of this invention. It is a circuit diagram of Embodiment 15 of the present invention. It is a wave form diagram for operation | movement description of Embodiment 15 of this invention. It is a circuit diagram of Embodiment 17 of this invention. It is a circuit diagram of one modification of Embodiment 17 of the present invention. It is a front view of the lighting fixture of Embodiment 18 of this invention. It is a whole block diagram of the illumination system of Embodiment 19 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting device 2 Rectifier circuit 3 Lighting circuit 4 Voltage detection circuit 5 Life determination circuit La Light source (lamp)

Claims (7)

At least a lighting device that turns on a light source that outputs light as a load, a component whose characteristics change with the usage time of the lighting device, a detection unit that detects the characteristics of the lighting device that changes due to the change in the characteristics, and the detection result Originally comprises a discriminating means for discriminating the life of the lighting device and a starting circuit for applying a higher voltage to the light source at the time of starting than at the time of stable lighting in order to start the light source, and the detecting means detects the high voltage. Characteristic lighting device. The lighting device according to claim 1, wherein the determination unit includes a storage unit that stores an initial characteristic value of the lighting device, and determines a lifetime based on a change amount of the detection value detected by the detection unit from the initial characteristic value. 3. The lighting device according to claim 1, wherein the component whose characteristics change is a voltage response type two-terminal switch element constituting the starting circuit . The lighting device according to claim 1 , wherein the detection unit detects a change in the voltage value of the high voltage . 4. The lighting device according to claim 1 , wherein the detecting means detects a change in the period of the high voltage . The lighting fixture which mounts the lighting device and light source in any one of Claims 1-5 . The lighting system which combines the lighting fixture of Claim 6 .

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