JP2002043086A - Discharge lamp lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device for correcting decline of luminous flux during lamp lighting period, and for reducing energy consumption. SOLUTION: In a discharge lamp lighting device provided with a discharge lamp, a discharge lamp lighting part capable of lighting the discharge lamp and controlling electric power supply to the discharge lamp, a lighting duration timer for timing the duration of power supply to the discharge lamp lighting part as a lighting duration of the discharge lamp, and a control part directing the discharge lamp lighting part an electric power supplied to the discharge lamp according to the lighting duration timed by the lighting duration timer for control of luminous flux decline associated with passing of the discharge lamp lighting duration, a function for informing that the average lifetime of the discharge lamp has been reached, or that it has reached the condition that the discharge lamp is lighted with a constant electric power (such as rated electric power) is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device capable of controlling power supplied to a discharge lamp in accordance with a lighting time.

[0002]

2. Description of the Related Art In general, the luminous flux of a lamp used for illumination (hereinafter, a discharge lamp is referred to as a lamp) decreases as time passes. FIG. 20 shows a technique for suppressing a decrease in illuminance due to the elapse of the lamp usage time (Japanese Patent Application No. Hei 10 (1994) -108686).
1-180884). As shown in FIG. 20, a discharge lamp 11 is provided as a lamp, and the discharge lamp 11 is turned on by an output of a discharge lamp lighting device 12 capable of dimming control. A lighting time detecting unit 13 for detecting whether or not the discharge lamp lighting device 12 is energized is provided between a power supply AC such as a commercial power supply and the discharge lamp lighting device 12, and is detected by the lighting time detecting unit 13. The turned-on period is counted by the lighting time timer 14. That is, the energizing period is set to the discharge lamp 1
The usage time of the discharge lamp 11 is counted by the lighting time timer 14 assuming that the usage period is one.

By the way, the light flux of the lamp decreases with the use time as shown in FIG. 21 (a), and the light quantity also decreases due to the lamp or the lamp on which the lamp is mounted being stained with time. Therefore, the illumination device 1 is provided with an illuminance correction device 15 in order to suppress such a decrease in the amount of light due to the elapse of the use time. Here, a decrease in the luminous flux of the discharge lamp 11 is caused by deterioration of the fluorescent material in the case of a fluorescent lamp. The illuminance correction device 15 is basically configured to correct a decrease in the luminous flux over the use time of the discharge lamp 11, and as shown in FIG.
Immediately after the replacement of the discharge lamp 11, the discharge lamp 11 is dimmed and turned on, and as the use time of the discharge lamp 11 elapses, the discharge lamp 11 approaches the full lighting (rated lighting).
2 to control the power supplied to the discharge lamp 11. That is, the output of the discharge lamp lighting device 12 is increased as the use time of the discharge lamp 11 elapses. As described above, while the luminous flux of the discharge lamp 11 decreases as the use time elapses, by increasing the power supplied to the discharge lamp 11 as the use time elapses, the light intensity of FIG. Thus, the light output of the discharge lamp 11 can be kept substantially constant.

As described above, in this conventional example, a discharge lamp 1 is provided in a lighting device 1 provided in the form of, for example, a lighting fixture.
1, the discharge lamp lighting device 12, the lighting time timer 14, and the illuminance correction device 15 are integrally provided, so that the luminous flux decreases with the lapse of the use time of the discharge lamp 11 only by performing the wiring connection to the power supply AC. Can be corrected, and wiring work can be handled in the same manner as a conventional lighting fixture. In addition, a lighting time detecting unit 13 is inserted between the discharge lamp lighting device 12 and the power supply AC, and only a period during which the lighting time detecting unit 13 determines that the discharge lamp 11 is lit is set to a lighting time timer. Since the time is measured by 14, a time substantially corresponding to the usage time of the discharge lamp 11 is detected by the lighting time timer 14, and the lighting / extinguishing of the discharge lamp 11 is repeated in a relatively short time. Even in the form, the usage time of the discharge lamp 11 can be accurately measured.

FIG. 22 shows the operation of this conventional example. Here, the lighting time timer 14 has a function of writing the measured time to the nonvolatile memory. Immediately after the power is turned on (S1), the lighting time timer 14 is initialized (S2), and the lighting time timer 14 is set. The lighting time (ie, use time) written in the non-volatile memory is read out to 14. When the lighting time is set in the lighting time timer 14 in this way, the illuminance correction device 15 reads the lighting time from the lighting time timer 14 (S4), and obtains a predetermined light output from the discharge lamp 11 based on the read usage time. Thus, the dimming ratio is determined (S5), and a dimming signal corresponding to the dimming ratio is output (S6). The discharge lamp lighting device 12 determines the power supply to the discharge lamp 11 according to the dimming signal. Next, the lighting time timer 14 measures the lighting time (that is, use time) (S7), and stores the lighting time after the counting in the nonvolatile memory (S8). Thereafter, the reading of the lighting time from the nonvolatile memory, the dimming control, and the writing of the lighting time to the nonvolatile memory are repeated.

FIG. 23 shows a specific circuit configuration. The discharge lamp lighting device 12 employs an inverter circuit. That is, a rectifier DB1 comprising a diode bridge for full-wave rectification of the power supply AC is provided, and a MOSFET is connected between the DC output terminals of the rectifier DB1 via the inductor L1.
The switching element Q3 is connected. further,
A series circuit of a diode D1 and a smoothing capacitor C1 is connected between both ends of the switching element Q3, and the inverter circuit is driven by using the smoothing capacitor C1 as a power supply. The inverter circuit includes a series circuit of a pair of switching elements Q1 and Q2 composed of MOSFETs connected between both ends of a smoothing capacitor C1, and a DC cut capacitor C2 and a resonance circuit between both ends of one switching element Q2. It has a configuration in which a series circuit of the inductor L2 and the discharge lamp 11 is connected. In addition, the discharge lamp 11
A capacitor C3 forming a resonance circuit together with the inductor L2 is connected between the non-power-supply-side ends of the two filaments. The switching elements Q1 to Q3 are connected to the inverter controller C.
It is turned on and off at a high frequency by N1, and the switching elements Q1 and Q2 are turned on and off alternately. Further, a dimming signal from the illuminance correction device 15 is input to the inverter control unit CN1, and the power supplied to the discharge lamp 11 is controlled by controlling the ON / OFF cycle (ie, operating frequency) of the switching elements Q1 and Q2. Is to be adjusted.

The operation of the inverter circuit shown in FIG. 23 is well known, and includes an inductor L1 and a switching element Q
3, an output current from the rectifier DB1 is boosted by a boosting chopper circuit composed of a diode D1 and a smoothing capacitor C1, and an alternating current flows through the discharge lamp 11 by alternately turning on and off the switching elements Q1 and Q2. is there. Here, since the inductor L2 and the capacitor C3 exist in the power supply path to the discharge lamp 11, the relationship between the ON / OFF cycle (operating frequency) of the switching elements Q1 and Q2 and the resonance frequency of the inductor L2, the capacitor C3, and the like. Thereby, the energy supplied to the discharge lamp 11 can be adjusted.

The lighting time detecting section 13 comprises a rectifier D comprising a series circuit of resistors R1 and R2 for dividing the voltage of the power supply AC and a diode bridge for full-wave rectifying the voltage across the resistor R2.
B2 and a smoothing capacitor C4 for smoothing the output voltage of the rectifier DB2. That is, the period during which the voltage across the smoothing capacitor C4 is equal to or higher than the specified voltage is set to the lighting time timer 1
4 times.

The illumination correction device 15 includes a lighting time timer 14.
And a microcomputer. The microcomputer reads and writes the time measured by the lighting time timer 14 and a nonvolatile memory 17 that is an EEPROM storing a correction table used in the illuminance correction device 15.
Is provided. The correction table is a table in which the use time of the discharge lamp 11 is associated with the dimming ratio for correction, and the usage time measured by the lighting time timer 14 in the dimming ratio setting unit 18 provided in the illuminance correction device 15. By reading the dimming ratio from the non-volatile memory 17 using the time, the dimming ratio for keeping the light output of the discharge lamp 11 substantially constant can be determined. The dimming ratio determined by the dimming ratio setting unit 18 is provided to the dimming signal generation unit 19, and the inverter control unit C
A dimming signal to be applied to N1 is generated. Here, the power of the lighting time timer 14, the dimming ratio setting unit 18, and the dimming signal generation unit 19 is supplied from a three-terminal regulator IC1 that makes the voltage across the smoothing capacitor C4 constant.

When the power supply AC is turned on and the voltage between both ends of the smoothing capacitor C4 reaches the specified voltage, the lighting time timer 14 performs the above-described initial setting processing and uses the non-volatile memory 17 to use the discharge lamp 11 up to the previous time. After reading out the time, the dimming ratio setting unit 18 is given this use time.
The dimming ratio setting unit 18 checks the usage time against the correction table stored in the nonvolatile memory 17 and reads out the dimming ratio corresponding to the usage time. The dimming ratio read in this way is given to the dimming signal generation unit 19, and the output of the inverter circuit is controlled. In addition, the lighting time timer 14
Then, the usage time is measured, and the time after the measurement is stored in the nonvolatile memory 17. Thereafter, while the power AC is being supplied, the operation of reading the use time from the non-volatile memory 17 and writing the new use time to the non-volatile memory 17 is repeated, and the discharge lamp 11 is supplied to the discharge lamp 11 according to the use time. It regulates the power supply.

The dimming signal supplied from the dimming signal generator 19 to the inverter controller CN1 can take various forms. In this example, the dimming signal is adjusted by the duty ratio of a rectangular wave signal having a frequency of 1 kHz and an amplitude of 5V. Although it is assumed that a signal representing the light ratio is used, it is also possible to use a light control signal which gives a light control ratio with a DC voltage of 0 to 10 V, for example. In the dimming signal in this example, the luminous flux ratio of the discharge lamp 11 to the duty ratio (the luminous flux ratio when the luminous flux when the rated power is applied is set to 100%) is set as shown in FIG. That is, the output of the discharge lamp lighting device 12 is set to increase as the ON period of the dimming signal decreases.

Here, a specific setting example of the correction table in the conventional example will be described. In a fluorescent lamp generally used for lighting as the discharge lamp 11, if the luminous flux at the beginning of the life (immediately after replacement of the lamp) is 100%, the luminous flux at the end of the life is 7%.
It is known that it is reduced to about 0%. That is, the output of the discharge lamp lighting device 12 is reduced to the rated output of 7
It is set to about 0%, and output is 1 at the end of life.
It is considered that the light output of the discharge lamp 11 can be kept substantially constant irrespective of the use time by raising it to 00%. In addition, if such control is performed, the discharge lamp lighting device 1
It is not necessary to make the output of No. 2 equal to or more than 110% of the rated output, so that power consumption can be suppressed at the beginning of the life and energy is saved.

FIG. 25A shows the transition of the luminous flux of the discharge lamp 11 with the lapse of time assuming that the output of the discharge lamp lighting device 12 is 70% of the rated output.
The luminous flux per hour is about 60%, which is about 9.8 from the initial life.
% Decrease. Therefore, when the output of the discharge lamp lighting device 12 is increased by the decrease of the luminous flux over time as shown in FIG. 25B, the luminous flux of the discharge lamp 11 is substantially constant irrespective of the elapsed time (that is, the use time). Is kept. Here, in order to control the output of the discharge lamp lighting device 12 as shown in FIG. 25 (b), the duty ratio corresponding to the luminous flux ratio at each time in FIG. 25 (b) is obtained from the relationship shown in FIG. The dimming ratio corresponding to the duty ratio obtained at each time may be stored in the nonvolatile memory 17 as a correction table as shown in FIG.

In the illustrated example, the lighting time is 0 hours, 40 hours.
00 hours, 8000 hours, 12000 hours, 16000
The luminous flux ratio, the luminous flux reduction rate, the output ratio of the discharge lamp lighting device 12, and the duty ratio of the dimming signal at each time when the time is as shown in Table 1.

[0015]

[Table 1]

The relationship between the lighting time and the duty ratio shown in Table 1 is stored in a nonvolatile memory 17 as a correction table, and the duty ratio is read out and released according to the lighting time measured by the lighting time timer 14. By giving the light to the lamp lighting device 11, the light output can be kept substantially constant (about 70% of the rated output) regardless of the lighting time.

In this conventional example, the lighting device 1 is a single lighting device, and a unit U1 having a discharge lamp lighting device 12 is provided.
(See FIG. 23) and a unit U2 including a lighting time detector 13, a lighting time timer 14, and an illuminance correction device 15, which are mounted on two circuit boards and incorporated into the lighting device 1. May be combined into one unit.
When integrated into one unit, it can be mounted on one circuit board, and a connection line connecting the dimming signal generation unit 19 and the inverter control unit CN1 is not required. Also, as compared with the case where two units U1 and U2 are provided, the number of circuit boards is reduced, so that the lighting device (lighting fixture) 1 can be saved in space and the number of components (boards and housings) can be reduced. Therefore, cost reduction or easy assembly can be achieved. The configuration example of the discharge lamp lighting device 12 described above is an example, and another configuration may be used as long as dimming control is possible.

(Conventional Example 2) FIG. 26 is a circuit diagram of a discharge lamp lighting device disclosed in Japanese Patent Application No. 11-180884, which is the same as Conventional Example 1, and its operation is shown in a flowchart of FIG. In this conventional example, as shown in FIG. 26, the lighting time can be reset by a mechanically operated reset switch SW3. That is, the reset switch SW3 is connected to the reset control unit 22 so that the lighting time can be reset regardless of the presence or absence of the Emiless state or the no-load state. Both ends of the reset switch SW3 are controlled by the reset control unit 22.
For example, a voltage of 5 V is applied, a resistor R3 is connected in series to the reset switch SW3, and when the reset switch SW3 is turned on, the input voltage to the reset control unit 22 is reduced in the same manner as when no load is detected. And
The lighting time timer 14 and the lighting time of the nonvolatile memory 17 are reset. The reset switch SW3 may be operated manually, or may be operated in conjunction with the attachment / detachment of the discharge lamp 11.

As shown in FIG. 27, when a reset signal is input to the reset control unit 22 by operating the reset switch SW3 (S3), the lighting time timer 1
4 and the lighting time in the nonvolatile memory 17 are reset (S9). In the configuration of this conventional example, the lighting time can be arbitrarily reset by operating the reset switch SW3. Moreover, the reset control unit 2
The lighting time can be reset with a simple configuration in which only the reset switch SW3 is provided in addition to the reset switch SW3. Other configurations and operations are the same as in the first conventional example.

[0020]

SUMMARY OF THE INVENTION An object of the present invention is to save energy by suppressing the initial excess luminous flux of the lamp and performing dimming lighting.
However, no control is performed after the lighting condition of the lamp has reached the full lighting state. The problems in the conventional example will be described below.

1) The discharge lamp is fully lit at the end of its life, when the discharge lamp reaches the average life as shown in FIG. 28A, or at a constant power as shown in FIG. 28B. This is the time when the rated power application state of the lamp is reached, after which the energy saving effect cannot be obtained. However, in the conventional example, there is no function for notifying the user.

2) Control after reaching the above state is not considered in the conventional example. The life of individual lamps varies from lamp to lamp, and the average life is often determined by the percentage of lamps that do not satisfy any of the characteristics, such as reduced luminous flux and broken filament. Will not last a lifetime. Considering the above, the following control is required when the discharge lamp reaches the average life, or after reaching the constant power or the rated power application state of the lamp (see FIG. 28C). .

A) To maintain comfort, the luminous flux is kept constant. b) Keep power consumption constant to maintain convenience and energy saving. c) Lighting is performed so that it can be understood that the lighting condition of the lamp is after reaching the full lighting state while further saving energy. d) The lamp is turned off because comfort and energy saving cannot be satisfied. In the case of such a discharge lamp lighting device pursuing comfort and energy saving, the above considerations are also necessary.

3) There is a difference as shown in FIG. 29 in the decay of the luminous flux depending on the type of the lamp. Then, as shown in FIG. 30, there is a problem that the light flux becomes excessive or insufficient over time, the design illuminance cannot be obtained, and the comfort is impaired.

4) When the discharge lamp lighting device as described in 3) above is for multiple lamps, and when the lamps mounted on the discharge lamp lighting device have different luminous flux decay curves, light variations among the multiple lamps are a concern. Or the comfort is impaired.

It is an object of the present invention to provide a discharge lamp lighting device which focuses on such a problem, corrects the luminous flux decrease due to the lamp lighting time, and saves energy.

[0027]

According to the discharge lamp lighting apparatus of the present invention, in order to solve the above-mentioned problems, as shown in FIG. 20, the discharge lamp 11 is turned on. Discharge lamp lighting unit 1 capable of controlling the power supplied to 11
2, a lighting time timer 14 for measuring a power supply time to the discharge lamp lighting unit 12 as a lighting time of the discharge lamp 11, and a lighting time timer 14 for suppressing a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp 11. In a discharge lamp lighting device including a control unit 15 that instructs the discharge lamp lighting unit 12 to supply electric power to the discharge lamp 11 according to the measured lighting time, a function of notifying that the discharge lamp 11 has reached an average life, or ,
It has a function of notifying that a state in which the discharge lamp 11 is turned on with constant power (for example, rated power) has been reached.

[0028]

(Embodiment 1) FIG. 1 is a flow chart showing the operation of Embodiment 1 of the present invention. The circuit diagram of the present embodiment is the same as that of FIG.
6, the operation of the microcomputer constituting the circuit is designed as shown in FIG. In the flow of FIG.
Compared to the conventional example, the function of determining the lighting time (S1
0), and a function (S11) of repeating the operation of switching the discharge lamp between the full lighting state and the dimming state every one second when the lighting time has reached the average life for one minute. That is, when the user turns on the power, the microcomputer reads the lighting time, and when the discharge lamp has reached the average life, switches the discharge lamp between the fully lit state and the dimming state to notify the user of the fact. It is to light up. The time when the average life has been reached is the state indicated by A in FIG. As a method of alternately lighting the full lighting state and the dimming state, for example, it can be realized by alternately repeating the minimum dimming ratio and the full lighting state in the dimming ratio setting unit for a certain period of time.

In the present embodiment, the above operation is performed when the discharge lamp reaches the average life. Similarly, as shown in FIG. 28B, the discharge lamp is lit at the rated output. The above operation may be performed when the condition is satisfied.

In this case, the user turns on the power and performs an operation in which the discharge lamp alternates between the full lighting state and the dimming state alternately. Further, it is possible to know that "the initial illuminance correction will not be performed in the future" and that "the lamp life is near".

In place of the operation of alternately lighting the discharge lamp in the full lighting state and the dimming state, the discharge lamp may be alternately switched between the lighting state and the extinguishing state to be in a blinking state.

FIG. 2 is a flowchart showing the operation of a modification of the present embodiment. Compared to the flowchart shown in FIG. 1, the function of determining whether the average life has been reached (S1
0) and the notification function (S
The difference is that step 11) is performed only immediately after the power is turned on.

(Embodiment 2) FIG. 3 shows a circuit diagram of Embodiment 2 of the present invention. In the present embodiment, a control power supply (capacitor C4) is used as a power supply, and a switch element SW4, a resistor R6,
The configuration is the same as that of FIG. 26 except that a monitor lamp lighting circuit including the monitor lamp 16 is provided. The monitor lamp lighting circuit turns on the switch element SW4 by turning on the switch element SW4 when the discharge lamp 11 reaches the time at which the discharge lamp 11 is turned on at the rated power, thereby notifying the user of the monitor lamp. . FIG. 4 shows an operation flow of the present embodiment.

As in the first embodiment, when the discharge lamp has reached the average life, the monitor lamp 16 is turned on to inform the discharge lamp. By doing so, the user can know that “the energy-saving lighting cannot be performed”, “the initial illumination correction will not be performed in the future”, and “the lamp life is near”.

(Embodiment 3) FIG. 5 shows Embodiment 3 of the present invention.
3 shows the characteristics of the discharge lamp ballast. This embodiment is an embodiment of control after reaching a time when the discharge lamp is turned on at the rated power. That is, since the luminous flux of the discharge lamp continues to decrease even after the time when the discharge lamp is turned on at the rated power, the output of the discharge lamp ballast is increased to compensate for this. In this case, since the discharge lamp lighting device outputs more than the rating of the discharge lamp, after the lighting time at the rated power is reached, the ballast will output more than a ballast that does not perform general illumination correction. However, since the initial illuminance correction is maintained, the illuminance does not decrease even after the lighting time has elapsed, as shown in FIG.

The circuit and operation flow of this embodiment may be the same as those of the previous embodiment (FIGS. 3 and 4). However, in the dimming signal setting section of the microcomputer, as shown in Table 2,
It is necessary to determine illuminance correction data exceeding the rating of the discharge lamp. In addition, the discharge lamp lighting device must be capable of producing an output that exceeds the rating of the discharge lamp. By determining the illuminance correction data that is equal to or higher than the rated value of the discharge lamp even after the time when the discharge lamp is turned on at the rated power, it is possible to provide a ballast in which the illuminance correction is continued.

[0037]

[Table 2]

(Embodiment 4) FIG. 7 shows Embodiment 4 of the present invention.
3 shows the characteristics of the discharge lamp ballast. This embodiment is also an embodiment of the control after reaching the time when the discharge lamp is turned on at the rated power. In the present embodiment, after reaching the time at which the discharge lamp is turned on at the rated power, the power supplied to the discharge lamp is controlled to be constant in the rated power state. Therefore, as shown in FIG. 8, the luminous flux declines with the passage of time, but the light output gradually decreases because the supplied power is constant.

The circuit and operation flow of this embodiment may be the same as those of the previous embodiment (FIGS. 3 and 4). However, it is necessary to determine the illuminance correction data of the discharge lamp in the dimming signal setting section of the microcomputer as shown in Table 3.

[0040]

[Table 3]

(Embodiment 5) FIG. 9 shows Embodiment 5 of the present invention.
3 shows the characteristics of the discharge lamp ballast. This embodiment is also an embodiment of the control after reaching the time when the discharge lamp is turned on at the rated power. In the present embodiment, the power supplied to the discharge lamp is gradually reduced from the rated power after the time at which the discharge lamp is turned on at the rated power. At the same time, the luminous flux of the discharge lamp itself also decreases with time, so that the light output sharply decreases with time as shown in FIG. However, since the power consumption is smaller than in the third or fourth embodiment, further energy saving can be performed. The sudden decrease in light output is a convenience for notifying the user of the lamp replacement time and keeping a minimum amount of light.

The circuit and operation flow of this embodiment may be the same as those of the previous embodiment (FIGS. 3 and 4). However, it is necessary to determine the illuminance correction data of the discharge lamp in the dimming signal setting section of the microcomputer as shown in Table 4.

[0043]

[Table 4]

FIGS. 11 and 12 show a modification of this embodiment. In this example, after reaching the time at which the discharge lamp is turned on at the rated power, the power supplied to the discharge lamp is reduced to a predetermined level lower than the rated power, and then gradually reduced from that level over time. Go. In this case, the light output suddenly decreases, so that the user can be notified of the lamp replacement time in an easy-to-understand manner, and the minimum light can be maintained.

FIGS. 13 and 14 show another modification of this embodiment.
Shown in In this example, the discharge lamp is turned off after the time at which the discharge lamp is turned on at the rated power is reached. In this case, since the light output is completely lost, the user can be prompted to replace the lamp.

Embodiment 6 FIG. 15 shows a circuit diagram of Embodiment 6 of the present invention. In this embodiment, a lamp discriminating function is added to the circuit shown in FIG. Switch SW
5, SW6 and the resistors R5, R6 are connected to the lamp determining unit 21 of the microcomputer, and determine the lamp by turning on / off the switches SW5, SW6. If both the switches SW5 and SW6 are ON, a white lamp, if the switch SW5 is ON, if the switch SW6 is OFF, a daylight lamp, and if both the switches SW5, SW6 are OFF, the lamp is a bulb lamp. The type of lamp can be determined. By setting in advance the dimming ratio of the illuminance correction based on the lighting time of these lamps in the dimming ratio setting unit 18 of the microcomputer, it is possible to perform the illuminance correction suitable for the type of the lamp. FIG. 16 shows an operation flow of the present embodiment.

Embodiment 7 FIG. 17 shows a circuit diagram of Embodiment 7 of the present invention. In the present embodiment, the lamp type of the discharge lamp is determined based on the initial illuminance / luminance detection result of the discharge lamp. The initial illuminance or luminance of the discharge lamp is detected by an illuminance or luminance sensor 23 provided in the vicinity of the discharge lamp, and the discharge lamp is determined by the lamp determination unit 21 of the microcomputer based on the detected value. If the output of the sensor 23 is an analog value, the data is input to the lamp discriminator 21 after A / D conversion. The operation flow is shown in Fig. 1.
Same as 6. As described above, by using the illuminance or luminance sensor 23, the lamp type of the discharge lamp can be automatically determined at the time of lamp replacement, and illuminance correction suitable for the lamp type of the discharge lamp can be performed.

(Eighth Embodiment) FIG. 18 shows a circuit diagram of an eighth embodiment of the present invention. In the present embodiment, in the discharge lamp lighting device for two lamps, the lamp discrimination switch SW of the sixth embodiment is used.
5. In addition to SW6, another set of lamp discriminating switches S
W7 and SW8 are provided. The first lamp determination switches SW5 and SW6 determine the type of the first lamp, and the second lamp determination switches SW7 and SW8 determine the type of the second lamp. Again, switches SW7, SW8
If both are ON, the white lamp and switch SW7 are O
N: If the switch SW8 is OFF, the type of lamp can be determined by deciding it as a daylight lamp, and if both the switches SW7 and SW8 are OFF, a light bulb color lamp. The dimming ratio setting unit 1 of the microcomputer
By setting the dimming ratio of the illuminance correction based on the lighting time of these lamps in advance in 8, it is possible to perform the illuminance correction suitable for the determined lamp type. FIG. 19 shows an operation flow of the present embodiment.

Table 5 shows the correction values. When two different types of lamps are mounted, an illuminance correction curve is derived by obtaining an intermediate luminous flux ratio between both lamps as shown in Table 5, and illuminance correction is performed. As a result, even if different kinds of lamps are mounted, the light output and the illuminance correction can be performed with little variation.

[0050]

[Table 5]

[0051]

According to the present invention, a discharge lamp, a discharge lamp lighting section capable of lighting the discharge lamp and controlling the power supplied to the discharge lamp, and a power supply time to the discharge lamp lighting section are determined by lighting the discharge lamp. A lighting time timer that measures time as a time, and instructs a discharge lamp lighting unit to supply electric power to the discharge lamp in accordance with the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. Discharge lamp lighting device provided with a control unit that has a function of notifying that the discharge lamp has reached an average life or a function of notifying that the discharge lamp has reached a state of lighting at a constant power (for example, rated power). Therefore, the user can be notified that the energy saving effect cannot be obtained. In addition, as control after the above state is reached, lighting control for maintaining a constant luminous flux to maintain comfort, or control for maintaining constant power consumption for maintaining convenience and energy saving, or energy saving By controlling the lighting so that the lighting condition of the lamp reaches the full lighting state while maintaining the above, it is possible to provide a discharge lamp lighting device pursuing comfort and energy saving. In addition, since comfort and energy saving cannot be satisfied, turning off the lamp can encourage the user to replace the lamp.

Further, the illuminance correction curve is changed depending on the type of the lamp, or when the different types of lamps are simultaneously turned on, the illuminance is corrected by calculating the intermediate luminous flux decrease of the different types of lamps, whereby the luminous flux is changed over time. It is possible to provide a discharge lamp lighting device that prevents the occurrence of excess or deficiency and prevents the design illuminance from being obtained, and suppresses the loss of comfort.

[Brief description of the drawings]

FIG. 1 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation of a modification of the first embodiment of the present invention.

FIG. 3 is a circuit diagram according to a second embodiment of the present invention.

FIG. 4 is a flowchart illustrating an operation according to the second exemplary embodiment of the present invention.

FIG. 5 is a characteristic diagram illustrating a temporal change in lamp applied power according to a third embodiment of the present invention.

FIG. 6 is a characteristic diagram showing a temporal change of a lamp light output ratio according to a third embodiment of the present invention.

FIG. 7 is a characteristic diagram illustrating a temporal change in lamp applied power according to a fourth embodiment of the present invention.

FIG. 8 is a characteristic diagram showing a temporal change of a lamp light output ratio according to a fourth embodiment of the present invention.

FIG. 9 is a characteristic diagram illustrating a temporal change in lamp applied power according to a fifth embodiment of the present invention.

FIG. 10 is a characteristic diagram showing a temporal change of a lamp light output ratio according to a fifth embodiment of the present invention.

FIG. 11 is a characteristic diagram illustrating a temporal change in lamp applied power according to a modification of the fifth embodiment of the present invention.

FIG. 12 is a characteristic diagram showing a temporal change of a lamp light output ratio according to a modification of the fifth embodiment of the present invention.

FIG. 13 is a characteristic diagram showing a temporal change in lamp applied power in another modification of the fifth embodiment of the present invention.

FIG. 14 is a characteristic diagram showing a temporal change of a lamp light output ratio in another modification of the fifth embodiment of the present invention.

FIG. 15 is a circuit diagram according to a sixth embodiment of the present invention.

FIG. 16 is a flowchart showing the operation of the sixth embodiment of the present invention.

FIG. 17 is a circuit diagram according to a seventh embodiment of the present invention.

FIG. 18 is a circuit diagram according to an eighth embodiment of the present invention.

FIG. 19 is a flowchart showing the operation of the eighth embodiment of the present invention.

FIG. 20 is a block diagram showing a schematic configuration of a conventional example.

FIG. 21 is an explanatory diagram showing a temporal change of a luminous flux of a lamp, a lighting device output, and a light output in a conventional example.

FIG. 22 is a flowchart showing the operation of the conventional example.

FIG. 23 is a circuit diagram showing a detailed configuration of a conventional example.

FIG. 24 is an explanatory diagram showing a relationship between a duty ratio of a dimming signal and an optical output ratio in a conventional example.

FIG. 25 is an explanatory diagram showing a temporal change in a luminous flux ratio of a lamp, an output ratio of a lighting device, and a duty ratio of a dimming signal in a conventional example.

FIG. 26 is a circuit diagram of another conventional example.

FIG. 27 is a flowchart showing the operation of the conventional example of FIG. 26;

FIG. 28 is a characteristic diagram showing a temporal change in lamp applied power in the conventional example of FIG. 26;

FIG. 29 is an explanatory diagram showing a difference in luminous flux attenuation characteristics depending on the type of lamp.

FIG. 30 is an explanatory diagram showing a temporal change of a lamp luminous flux whose illuminance has been corrected according to a type of a lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Discharge lamp 12 Discharge lamp lighting device 13 Lighting time detection part 14 Lighting time timer 15 Illuminance correction device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kei Keiyasu 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Goro 404-1, Nishinobumatsu, Himeji City, Hyogo Prefecture 72) Inventor Masayoshi Yasuda 404-1, Nishinobe, Himeji-shi, Hyogo Ikeda Electric Co., Ltd. F term (reference) 3K098 CC17 CC18 CC40 DD01 DD22 DD36 DD46 EE17 EE37 FF02

Claims (12)

[Claims] 1. A discharge lamp, a discharge lamp lighting section capable of controlling the power supplied to the discharge lamp while lighting the discharge lamp, and a lighting time for measuring a power supply time to the discharge lamp lighting section as a lighting time of the discharge lamp. A discharge unit including a timer and a control unit that instructs the discharge lamp lighting unit to supply power to the discharge lamp in accordance with the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. A discharge lamp lighting device having a function of notifying that a discharge lamp has reached an average life. 2. A discharge lamp, a discharge lamp lighting unit capable of controlling the power supplied to the discharge lamp while lighting the discharge lamp, and a lighting time for measuring a power supply time to the discharge lamp lighting unit as a discharge lamp lighting time. A discharge unit including a timer and a control unit that instructs the discharge lamp lighting unit to supply power to the discharge lamp in accordance with the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. A discharge lamp lighting device having a function of notifying that the discharge lamp lighting device has reached a state of lighting the discharge lamp with a constant power. 3. The discharge lamp according to claim 1, wherein the discharge lamp has a function of notifying the monitor lamp that the average life of the discharge lamp has been reached or that the discharge lamp has been turned on with a constant power. Lighting device. 4. A flash lamp or dimming function for notifying that the discharge lamp has reached an average life or has reached a state of lighting the discharge lamp at a constant power. Or the discharge lamp lighting device according to 2. 5. A discharge lamp, a discharge lamp lighting section for lighting the discharge lamp and controlling the power supplied to the discharge lamp, and a lighting time for measuring a power supply time to the discharge lamp lighting section as a discharge lamp lighting time. A discharge unit including a timer and a control unit that instructs the discharge lamp lighting unit to supply power to the discharge lamp in accordance with the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. In the lamp lighting device, after the discharge lamp lighting device reaches a state in which the discharge lamp is lit at a constant power or the rated power of the discharge lamp, according to a lighting time measured by a lighting time timer to suppress a decrease in luminous flux. A discharge lamp lighting device having a function of supplying power to a discharge lamp. 6. A discharge lamp, a discharge lamp lighting section capable of lighting the discharge lamp and controlling the power supplied to the discharge lamp, and a lighting time for measuring a power supply time to the discharge lamp lighting section as a discharge lamp lighting time. A discharge unit including a timer and a control unit that instructs the discharge lamp lighting unit to supply power to the discharge lamp in accordance with the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. An electric lamp lighting device comprising: a function of supplying the rated power to the discharge lamp after the discharge lamp lighting device reaches a state in which the discharge lamp is lit at the rated power of the discharge lamp. 7. A discharge lamp, a discharge lamp lighting section capable of controlling the power supplied to the discharge lamp while lighting the discharge lamp, and a lighting time for measuring a power supply time to the discharge lamp lighting section as a lighting time of the discharge lamp. A discharge unit including a timer and a control unit that instructs the discharge lamp lighting unit to supply power to the discharge lamp in accordance with the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. In the electric lamp lighting device, the discharge lamp lighting device has a function of turning off or dimming the discharge lamp after the discharge lamp lighting device reaches a state of lighting the discharge lamp at a constant power or the rated power of the discharge lamp. apparatus. 8. A discharge lamp, a discharge lamp lighting section capable of controlling the power supplied to the discharge lamp while lighting the discharge lamp, and a lighting time for measuring a power supply time to the discharge lamp lighting section as a discharge lamp lighting time. A discharge unit including a timer and a control unit that instructs the discharge lamp lighting unit to supply power to the discharge lamp in accordance with the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. In the lamp lighting device, after the discharge lamp lighting device reaches a state in which the discharge lamp is lit at a constant power or the rated power of the discharge lamp, the device has a function of dimming the discharge lamp according to the measured lighting time. Discharge lamp lighting device. 9. A discharge lamp, a discharge lamp lighting unit capable of lighting the discharge lamp and controlling power supplied to the discharge lamp, and a lighting time for measuring a power supply time to the discharge lamp lighting unit as a discharge lamp lighting time. A discharge unit including a timer and a control unit that instructs the discharge lamp lighting unit to supply power to the discharge lamp in accordance with the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. In the electric lamp lighting device, after the discharge lamp lighting device reaches a state of lighting the discharge lamp at a constant power or the rated power of the discharge lamp, the illuminance of the discharge lamp is corrected with another light output according to the measured lighting time. A discharge lamp lighting device having a function. 10. A discharge lamp, a discharge lamp lighting section for lighting the discharge lamp and controlling power supplied to the discharge lamp,
The lighting time timer measures the power supply time to the discharge lamp lighting section as the lighting time of the discharge lamp, and according to the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. A discharge lamp lighting device including a control unit for instructing a power supply to a discharge lamp to a discharge lamp lighting unit, wherein the discharge lamp has a function of changing a correction curve for suppressing a reduction in luminous flux according to the type of the discharge lamp. Lighting device. 11. A discharge lamp, a discharge lamp lighting section for lighting the discharge lamp and controlling power supplied to the discharge lamp,
The lighting time timer measures the power supply time to the discharge lamp lighting section as the lighting time of the discharge lamp, and according to the lighting time measured by the lighting time timer so as to suppress a decrease in luminous flux due to the elapse of the lighting time of the discharge lamp. In a multi-lamp discharge lamp lighting device including a control unit that instructs a power supply to a discharge lamp to a discharge lamp lighting unit, when two or more types of discharge lamps are turned on, the average luminous flux of each type of discharge lamp is reduced. A discharge lamp lighting device having a function of calculating and correcting illuminance. 12. The discharge lamp lighting device according to claim 5, wherein the discharge lamp lighting device has a function of notifying that the discharge lamp has reached an average life or has reached a state of lighting with a constant power. Discharge lamp lighting device.