JP2008282823A - Discharge lamp lighting device and illumination fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable setting of a plurality of dimming operation modes in order to carry out stepwise dimming to carry out dimming by two steps, continuous dimming, or illuminance correction in a discharge lamp lighting device having the same main circuit and control circuit, and furthermore make an operation mode changeover switch unnecessary. <P>SOLUTION: The dimming control circuit 4 has a first memory means 7 to memorize dimming data beforehand in order to form a first dimming signal, a second memory means 8 capable of writing dimming method data, and an arithmetic processing means 6 in which according to the dimming method data read out from the second memory means 8, the dimming signal data memorized in the first memory means 7 are read out and in which the first dimming signal is calculated and formed according to the selected dimming signal data. The dimming method data are made to be memorized in the second memory means 8 according to the selected signal based on a prescribed procedure to be input into the arithmetic processing means 6. A selective input part to input the selected signal based on the prescribed procedure inputs the selective signal from outside the discharge lamp lighting device, and has a connecting terminal capable of transferring electric signals. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a discharge lamp lighting device capable of lighting a discharge lamp and dimming it, and a lighting fixture using the same.

  The following is generally known as a discharge lamp lighting device that uses a commercial power supply as a power source, performs lighting control of the discharge lamp, and performs dimming control to arbitrarily increase or decrease the light output of the discharge lamp.

(A) In Japanese Patent Laid-Open No. 8-153590, there is disclosed a discharge lamp lighting device capable of arbitrarily setting a dimming curve indicating a correlation between a duty ratio and a dimming ratio using an external control signal. It is disclosed. A dimming signal output from a dimmer installed outside the lighting fixture or a control block is received, and the light output of the discharge lamp is increased or decreased according to the dimming signal. As a dimming signal, a PWM signal of 100 Hz or 1 KHz is generally used in Japan, and the light output of the discharge lamp can be continuously varied by continuously varying the duty ratio of the PWM signal. Can do.

(B) Japanese Laid-Open Patent Publication No. 1-143189 discloses an illumination control device that detects light output from a light source by a detecting means and corrects illuminance. A detection signal output from a sensor installed outside or outside the lighting fixture is received, and the light output of the discharge lamp is increased or decreased according to the detection value of the sensor. For example, by detecting infrared rays emitted from a person, the discharge lamp is turned on / off or fully turned on / dimmed, or the brightness of sunlight is detected, and the discharge lamp is adjusted according to the brightness of the sunlight. Some have variable light ratio.

(C) In Japanese Patent Application Laid-Open No. 2001-15276, a lighting time of a discharge lamp is measured, written to and read from a nonvolatile memory, and a microcomputer having an illuminance correction table corresponding to the measured time is output from the microcomputer. Dimming (brightening) is performed according to a signal that is generated, that is, a signal corresponding to the passage of the lighting time of the discharge lamp, and the time measured written in the non-volatile memory when performing a predetermined operation, for example, power switching according to a prescribed procedure A discharge lamp lighting device for correcting illuminance to be reset is disclosed. It is known that the luminous flux of a discharge lamp decreases with the passage of time of use. The lighting time of the discharge lamp is measured and stored, and the light output of the discharge lamp is increased based on a correction table in which the dimming ratio is set so as to correct the decrease in the luminous flux of the discharge lamp as the lighting time elapses.

(D) As for the above (c), a discharge lamp lighting device for illuminance correction linked with an external signal is disclosed in Japanese Patent Laid-Open No. 2001-338883.

(E) Further, Japanese Patent Application No. 2005-6940 is related to the above (c). In order to reduce the high-frequency current fed back from the discharge lamp lighting device to the commercial power supply line, a path connecting at least one line before rectification of the commercial power supply to the ground via a capacitive element is provided.
JP-A-8-153590 Japanese Patent Laid-Open No. 1-143189 JP 2001-15276 A JP 2001-338783 A

  By the way, said patent document 1 (Unexamined-Japanese-Patent No. 8-153590)-patent document 3 (Unexamined-Japanese-Patent No. 2001-15276) operate | move based on a different control signal, respectively, and the signal input from the exterior of a discharge lamp lighting device Therefore, it was necessary to separately configure a discharge lamp lighting device corresponding to each application.

  Further, in Patent Document 4 (Japanese Patent Laid-Open No. 2001-338883), two mode switching switches are provided, and an operation mode in which illuminance correction is performed according to a combination of on / off of the mode switching switch, and continuous light control is performed. Although switching control such as an operation mode and an operation mode in which dimming is performed in two stages is disclosed, there are only four modes because there are four on / off combinations when there are two mode switching switches. In order to realize a large number of operation modes, it was necessary to increase the number of switches for mode switching.

  In order to realize such a mode switch at a low cost, it is possible to easily perform a switch-like operation depending on whether or not conductive parts such as lead wires and resistors are mounted, but a discharge lamp lighting device is once completed. It takes time and effort to rework after the product is finished, and it is extremely difficult to rework in large quantities.

  To easily change the operation mode, a dip switch, toggle switch, etc. are required outside the case that covers the discharge lamp lighting device, but a protective cover is required to prevent the switch charging part from being exposed. Therefore, it is expensive, and signal wiring corresponding to the number of switches is required, which causes a problem that the discharge lamp lighting device and the printed circuit board disposed in the device are increased in size.

  In the fifth conventional example (Japanese Patent Application No. 2005-6940), a capacitive element is provided between the input terminal of the rectifying unit that rectifies the AC voltage supplied by the one-way switch that opens and closes one line of the AC power supply and the ground. Reset control for detecting a discharge lamp is not mounted in a discharge lamp lighting device having, and further resetting a lighting time stored in a non-volatile memory to an initial value by interrupting supply of an AC voltage in a predetermined procedure It is disclosed.

  In this example, when the AC voltage is supplied by the one-off switch when there is no load without the discharge lamp mounted, it is possible to detect the on / off of the one-piece switch by monitoring the rectifier output. However, when a capacitive element is connected between the input terminal of the rectifying unit and the ground, the noise terminal voltage is deteriorated at about 500 KHz to 700 KHz as compared with the case where a capacitive element is connected between the output stage of the rectifying unit and the ground. There is a problem of doing.

  In the discharge lamp lighting device having the same main circuit and control circuit, the present invention can set a plurality of dimming operation modes for performing dimming that performs dimming in two steps, continuous dimming, and illuminance correction, An object is to eliminate the need for an operation mode changeover switch.

  In the discharge lamp lighting device according to claim 1, in order to solve the above problem, as shown in FIG. 1, a rectification unit DB for rectifying a supply voltage from an AC power supply AC, and a pulse output from the rectification unit DB. A DC power supply circuit (step-up chopper circuit) 1 that smoothes the flowing voltage, an inverter circuit 2 that has at least one switching element Q1, Q2 and converts the DC voltage output from the DC power supply circuit 1 to a high frequency, and at least one A resonance circuit 3 having two resonance inductors L1 and a resonance capacitor C2 and inputting a high-frequency voltage supplied from the inverter circuit 2 to turn on the discharge lamp la by a resonance action; and the switching element Q1 of the inverter circuit 2 , Q2 to output a drive signal to determine the operating frequency of the inverter circuit 2, and to supply control power to the dimming control circuit 4 In the discharge lamp lighting device including the control power circuit 5, the dimming control circuit 4 includes first storage means 7 for preliminarily storing dimming signal data for generating the first dimming signal, and dimming control data. The second storage means 8 to which the optical system data can be written, and the dimming signal data stored in the first storage means 7 according to the dimming system data read from the second storage means 8 and selected. Arithmetic processing means 6 for calculating and generating the first dimming signal according to the dimming signal data, and the operating frequency of the inverter circuit 2 according to the first dimming signal output from the arithmetic processing means 6 The frequency generation means (inverter operation signal generation unit 13) for generating the operation signal corresponding to the above, and the operation signal output from the frequency generation means 13 is converted into a drive signal and driven to the switching elements Q1 and Q2 of the inverter circuit 2 Signal And a dimming method data stored in the second storage means 8 in accordance with a selection signal based on a predetermined procedure input to the arithmetic processing means 6, and the selection signal The selection input unit for inputting has a connection terminal for inputting the selection signal from the outside of the discharge lamp lighting device and capable of transmitting an electrical signal.

  According to the present invention, the dimming method data is stored in the second storage unit according to the selection signal based on the predetermined procedure input to the arithmetic processing unit, and is read out from the second storage unit. Since the dimming signal data stored in the first storage means is read out in accordance with the data, even if one discharge lamp lighting device is used, various selections are made to the arithmetic processing means based on a predetermined procedure. It is possible to select a plurality of dimming methods by applying a signal, eliminating the need for a switching switch for realizing a plurality of dimming modes as described in the prior art, There is an advantage that it is inexpensive and can be downsized.

(Embodiment 1)
A circuit diagram of Embodiment 1 of the present invention is shown in FIG. This lighting device has a rectifier DB that rectifies by inputting a supply voltage from an AC power supply AC, a boost chopper circuit 1 that smoothes the output of the rectifier DB, and switching elements Q1 and Q2, and outputs from the boost chopper circuit 1. The inverter circuit 2 that converts the DC voltage to high frequency, the resonance inductor L1, the resonance capacitor C2, and the discharge lamp la, receives the high frequency voltage supplied from the inverter circuit 2, and releases it by the resonance action. A resonance circuit 3 for starting and lighting the lamp la, a preheating circuit 50 connected in parallel to the switching element Q2, having a preheating transformer T1 and a DC cut capacitor C3, and preheating the filament of the discharge lamp la, and the switching element Q1 , Q2 is output, and a discharge signal is output by varying the operating frequency of the inverter circuit 2 a dimming control circuit 4 that varies the power supplied to a and a control power source that is connected to any one of the step-up chopper circuit 1, the inverter circuit 2, and the resonance circuit 3 and supplies a control power to the dimming control circuit 4 The circuit 5 is configured.

  Since the step-up chopper circuit 1 and the inverter circuit 2 are known, a detailed description of the operation is omitted. First, the dimming control circuit 4 will be described. The dimming control circuit 4 is mainly composed of a microcomputer, and includes an arithmetic processing unit 6 that generates a dimming signal, a memory unit A and a memory unit B that are connected to or incorporated outside the arithmetic processing unit 6, and arithmetic processing. The dimming signal generated by the unit 6 is input, the inverter operating signal generating unit 13 that determines the inverter operating frequency according to the dimming signal, the signal output from the inverter operating signal generating unit 13 is input, and the switching element The drive circuit 14 supplies drive signals to Q1 and Q2.

  Next, the configuration and schematic operation of the arithmetic processing unit 6 will be described. In the arithmetic processing unit 6, a signal arbitrarily set at the input terminal write of the dimming control circuit 4, that is, the input terminal of the arithmetic processing unit 6 is first input to the dimming method writing unit 9. The dimming method writing unit 9 performs a predetermined process in accordance with the input setting signal, and stores the setting state in the memory unit B. The dimming data selection unit 10 reads the contents stored in the memory unit B, and selects the use range of data stored in advance in the memory unit A according to the stored contents of the memory unit B. Further, data to be used is determined among the data selected by the memory unit A according to the time counted by the timer unit 11. The memory unit A outputs the determined data to the dimming signal generation unit 12, and the dimming signal corresponding to the selected data is generated.

  This will be described in more detail with reference to the flowchart of FIG. When the control power supply Vs is supplied from the control power supply circuit 5, the dimming control circuit 4 and the arithmetic processing unit 6 constituting the same start operation (S1). At this time, first, the dimming method writing unit 9 confirms the level of the signal input to the write terminal and determines whether the voltage is higher than 1.5 V, for example (S2). When the level of the signal input to the write terminal is higher than 1.5V, it is determined whether or not the signal is input according to a predetermined procedure (S4). If it is the procedure 0, the full lighting is set (S5), If it is procedure 1, it is recognized as setting of illuminance correction A (S6), and if it is procedure 2, it is recognized as setting of illuminance correction B (S7), and the setting state of this dimming method is written to memory B (S8). .

  Here, the procedures 0, 1 and 2 are not limited. For example, the procedure 0 is performed when the voltage applied to the write terminal is changed from 1.5 V to 0.5 V or less. The case where the voltage is high and 1.0 V or less is referred to as Procedure 1, and the case where the voltage is higher than 1.0 V and 1.5 V or less is referred to as Procedure 2. Further, the memory unit B may be configured so that the setting state can be rewritten every time the procedure 0, 1 or 2 is performed. For example, a nonvolatile memory may be used.

  In accordance with the dimming method written in the memory unit B, the data stored in the memory unit A in advance and used to generate a dimming signal corresponding to the dimming ratio for dimming the discharge lamp la at a predetermined level. The range of use is selected.

  In the case of the dimming method of illuminance correction A, as shown by the solid line in FIG. 3, it starts at a dimming ratio of 70% at 0 hours with respect to the accumulated lighting time of the discharge lamp la counted by the timer unit 11. It becomes a setting.

  In the case of the dimming method of the illuminance correction B, as shown by the broken line in FIG. 3, the setting is such that the dimming ratio starts at 80% at 0 hour with respect to the accumulated lighting time of the discharge lamp la.

  When the setting of full lighting is performed, the setting is as shown by a one-dot chain line in FIG.

  Therefore, if the light control signal corresponding to the light control ratio of 1: 1 is set as the duty ratio, the memory unit A may store the duty ratio in the range indicated by the broken line in FIG. The duty ratio that can output% is stored in the data table. In the present embodiment, in the case of the illuminance correction A, the duty ratio range corresponding to the dimming ratio of 70% to 100% is selected.

  After selecting the range of the duty ratio, a determination process is performed as to whether or not to initialize the accumulated time counted by the timer unit 11 (S10). For example, when the voltage input in the procedure 0, 1 or 2 continues for a predetermined time or longer, a process for initializing the accumulated time may be performed (S16). After the accumulated time is initialized, in the case of illuminance correction A, the duty ratio range corresponding to the dimming ratio of 70% to 100% is selected, so the duty ratio of the accumulated time 0 hour is adjusted from the memory unit A. It is read out to the optical signal generator 12 (S12), and a dimming signal corresponding to the duty ratio is generated (S13). The timer unit 11 performs a process of counting the lamp lighting time (S14), and stores the counted time in the memory unit A (S15). The time stored in the memory unit A is read again to the dimming signal generation unit 12 (S11), and the duty ratio corresponding to the accumulated time is read again from the memory unit A to the dimming signal generation unit 12.

  A resistor is connected between the write terminal and the ground as shown in FIG. Therefore, unless a voltage is applied to the write terminal from the outside of the dimming control circuit 4, the voltage generated at the write terminal is 0V. Normally, since the write terminal is 0 V, the light control method set as described above is read (S3), and a light control signal is generated according to the set light control method.

  The dimming signal determined in this way is input to the inverter operation signal generation unit 13, and the operation frequency of the inverter circuit 2 is varied so as to realize the dimming signal, that is, the dimming ratio corresponding to the duty ratio 1: 1. .

  By performing the operation as described above, it is possible to realize a plurality of dimming methods by applying a voltage based on a predetermined operation to the write terminal of the arithmetic processing unit 6 with one discharge lamp lighting device.

  Further, in the present embodiment, a switching switch for realizing a plurality of dimming modes as described in the prior art is not necessary, and the discharge lamp lighting device can be made inexpensive and further downsized.

  Here, the illuminance correction data with respect to the cumulative lighting time of the discharge lamp is not limited to FIG. 3, and as shown in FIG. 5, the dimming ratio at the initial lighting is 70% or 80%. Alternatively, the data may be 100% in a predetermined time longer than the rated lamp life time.

  In addition, the lighting initial dimming ratios of 70% and 80% in the present embodiment are not limited to these values, and can be set to five values, for example, 60%, 65%, 70%, 75%, and 80%. It may be a configuration / procedure.

(Embodiment 2)
A circuit diagram of Embodiment 2 of the present invention is shown in FIG. The configuration is almost the same as that of the first embodiment, but it has a Test 1 terminal connected to the write terminal of the arithmetic processing unit 6 and a Test 2 terminal connected to the ground.

  Furthermore, it has the power supply detection circuit 15 which detects the output voltage of rectifier DB. Also in this example, the dimming method is changed by applying a voltage as described in the first embodiment between the Test 1 terminal connected to the write terminal and the Test 2 terminal connected to the ground, and operating according to a predetermined procedure. Is possible.

  The detailed operation of this example will be described with reference to the flowchart of FIG. The flowchart of FIG. 7 is almost the same as that of the first embodiment, and different points will be described. When the control power is supplied, the dimming control circuit 4 and the arithmetic processing unit 6 constituting the operation start (S1). First, the detection signal Vdet output from the power detection circuit 15 is equal to or higher than a predetermined value. It is determined whether or not there is (S2).

  That is, when the voltage supplied from the AC power supply AC is a normal value, the output voltage of the rectifier DB is also normal, so that the detection signal Vdet output from the power supply detection circuit 15 satisfies a predetermined value or more.

  When it is determined that the detection signal Vdet output from the power supply detection circuit 15 is equal to or greater than a predetermined value, the dimming method writing unit 9 checks the level of the signal input to the write terminal (S3).

  After the dimming method is set by the operation described in the first embodiment and the use range of the data for generating the dimming signal is selected, the detection signal output from the power supply detection circuit 15 is confirmed again. (S11).

  If the detection signal Vdet output from the power supply detection circuit 15 is greater than or equal to a predetermined value, the voltage at the write terminal is checked again. If the detection signal Vdet output from the power supply detection circuit 15 is less than the predetermined value, the timer unit A process of initializing the accumulated time counted at 11 is performed (S12).

  The Test1 terminal and the Test2 terminal are arranged on a printed circuit board on which electronic components constituting the discharge lamp lighting device are mounted, and a light control method is provided by providing a terminal for applying a voltage to the write terminal on the printed circuit board. The workability at the time of changing can be remarkably improved.

  Here, the Test1 terminal and the Test2 terminal do not necessarily have a terminal structure. For example, the conductor is exposed without performing solder resist processing on a part of the conductor printed on the printed board, and the exposed portion is used as the Test1 terminal. And may be used as Test2 terminals.

  Further, a capacitor may be connected in parallel between the write terminal and the ground, and each lead of the capacitor may be used as a Test1 terminal and a Test2 terminal.

(Embodiment 3)
A circuit diagram of Embodiment 3 of the present invention is shown in FIG. Although the configuration is almost the same as that of the second embodiment, the write terminal of the arithmetic processing unit 6 and the ground are electrically connected to the connector CN2 that enables connection to the outside of the discharge lamp lighting device, and the AC power supply AC is a connector. It is input to the rectifier DB via CN1.

  The discharge lamp lighting device is covered with a case as shown in FIG. 9, and the connector CN1 and the connector CN2 are arranged as shown in FIG. 40 is a printed circuit board, 41 is a case, and 42 is a cover.

  With such a structure, the case 41 and the cover 42 are not disassembled and the printed board 40 is not exposed even after the printed board 40 on which the electronic components constituting the discharge lamp lighting device are mounted in the case 41. Since the dimming method can be changed, the workability can be further improved as compared with the second embodiment.

  Moreover, in this example, even after the lighting fixture using the above-mentioned discharge lamp lighting device is constructed, the light control method can be changed relatively easily.

(Embodiment 4)
A circuit diagram of Embodiment 4 of the present invention is shown in FIG. The configuration is substantially the same as that of the third embodiment, and an electric signal from the connector CN2 that enables connection to the outside of the discharge lamp lighting device is propagated between the write terminal of the arithmetic processing unit 6 and the ground. . Furthermore, the electrical signal input to the connector CN2 is configured to propagate between the sig terminal of the arithmetic processing unit 6 and the ground.

  The operation of the arithmetic processing unit 6 in this example is as follows. Also in this example, the dimming method is set in the dimming method writing unit 9 by applying a signal based on a predetermined operation to the write terminal and stored in the memory unit B. According to the dimming method written in the memory unit B, data stored in advance in the memory unit A and used to generate a dimming signal corresponding to the dimming ratio for dimming the discharge lamp la at a predetermined level. The range of use is selected.

  The dimming method selection data in this example is shown in FIG. As shown in the figure, in this example, the duty ratio is stored in advance as a data table in the memory unit A so that a dimming method of continuous dimming A and continuous dimming B can be selected. In the case of the continuous light control method A, the lower limit value of the light control ratio is set to 25% as shown by the solid line in FIG. As indicated by the one-dot chain line in the figure, the lower limit value of the dimming ratio is set to 40%, and the duty ratio range corresponding to the dimming method selected in the memory unit A is selected. In accordance with a signal input to the sig terminal and input from the external signal input unit 16 to the memory unit A, a predetermined duty ratio is read from the memory range A to the dimming signal generation unit 12 from the selected range, and the duty is A dimming signal corresponding to the ratio is generated.

  The dimming method switching procedure in this example will be described. An external dimming signal for dimming the discharge lamp la to a predetermined value is usually input to the input connector CN2 of the discharge lamp lighting device from the discharge lamp lighting device or the outside of a lighting fixture using the discharge lamp la. For example, the external dimming signal is input to the connector CN2 as a duty signal having an amplitude of 10 V and a frequency of 1 KHz, and is emitted at a dimming ratio of 100% when a duty ratio of 100% is input as shown in FIG. Turn on the light la.

  Here, when switching the dimming method, a DC signal of 20 V is input to the connector CN2. A series circuit of a Zener diode ZD1 and a photocoupler PC2 input unit is connected in parallel with the connector CN2. By setting the Zener voltage of the Zener diode ZD1 between 10V and 20V, when a 20V DC signal is input to the connector CN2, the Zener diode ZD1 becomes conductive and current flows through the input portion of the photocoupler PC2. The output stage of the coupler PC2 is turned on. The output stage of the photocoupler PC2 is connected to the base of the transistor Tr2. The base of the transistor Tr2 has base current supply means from the control power supply circuit 5 via the resistor R5, and the transistor Tr2 is turned off when the output stage of the photocoupler PC2 is turned on. Therefore, the H signal is input to the write terminal.

  In this example, the H signal is input to the write terminal, and then, for example, when a duty signal of 1 KHz and 20 V is input at a duty ratio of 10%, the lower limit value of the dimming ratio is set to 25%. What is necessary is just to set so that the lower limit value of the dimming ratio is 40% when a 20V duty signal is input at a duty ratio of 30%.

  Normally, a duty signal having an amplitude of 10 V and a frequency of 1 kHz is input to the connector CN2 as described above. At this time, the output stage of the photocoupler PC1 is turned on / off according to the duty ratio, and the transistor Tr1 is turned on.・ Turn it off.

  As described above, by inputting the dimming method switching signal to the connector to which the external dimming signal is input, even after the lighting fixture using the above-described discharge lamp lighting device is constructed, It is possible to easily change the dimming method via the dimming signal wiring.

  Here, the arithmetic processing unit 6 has the timer unit 11 as in the first to third embodiments, but according to the accumulated lighting time of the discharge lamp counted by the timer unit 11 and the signal output from the external signal input unit 16. Thus, processing for determining the duty ratio may be performed.

(Embodiment 5)
A circuit diagram of Embodiment 5 of the present invention is shown in FIG. The configuration is almost the same as in the third embodiment, and the dimming method set by the dimming method writing unit 9 is stored in the memory unit B. In accordance with the dimming method stored in the memory unit B, the dimming data selection unit 10 selects a data use range for generating a dimming signal stored in the memory unit A as a data table in advance. . The timer unit 11 performs a process of counting the lamp lighting time, and stores the counted time in the memory unit C. The time stored in the memory unit C is read again to the timer unit 11, and the duty ratio corresponding to the accumulated time is read from the memory unit A to the dimming signal generation unit 12.

  The detailed operation of the arithmetic processing unit 6 in this example is as shown in the flowchart of FIG. 13 and is almost the same as the flowchart of the second embodiment shown in FIG. The use range of data for generating the dimming signal stored in the memory unit A is determined (S10), and the detection signal proportional to the level of the AC power supply detected by the power supply detection circuit 15 is equal to or greater than a predetermined value. This is the same as in the second embodiment until it is determined whether or not (S11).

  When the detection signal of the power supply detection circuit 15 is lower than the predetermined value, that is, when the AC power supply is turned off, the stored value of the time corresponding to the lamp lighting cumulative time stored in the memory unit C is initialized to 0 Determine whether or not.

  Although not specifically described in this flowchart, for example, when the voltage applied to the connector CN2 is set to 0 V for 2 seconds or longer, the accumulated lighting time may be initialized.

  In this example, the memory unit B and the memory unit C write and read at arbitrary timings, and the memory unit B and the memory unit C are configured by a single nonvolatile memory to form the arithmetic processing unit 6. It is good also as a structure connected to the exterior of a microcomputer. Further, since what is stored in the memory unit A is a data table for generating a dimming signal in advance, ROM and RAM inside the microcomputer may be used.

  Furthermore, the process for initializing the accumulated lighting time in this example is not limited to the above-described content. For example, the AC power supply AC is turned on again within a few seconds so that the detection signal of the power supply detection circuit 15 becomes a predetermined value or more. Good.

(Embodiment 6)
A circuit diagram of Embodiment 6 of the present invention is shown in FIG. The configuration of the discharge lamp lighting device is almost the same as that of the fourth embodiment (FIG. 10). One end of the quaternary winding n4 of the preheating transformer T1 constituting the preheating circuit 50 is connected to the cathode side of the input portions of the photocouplers PC1 and PC2, and the other end of the quaternary winding n4 is connected to the diode D1 and the resistor R6. A DC power source is generated by charging the capacitor C7 through a series circuit, and current is supplied to the photocoupler PC1 through the resistor R7. Here, the charging voltage of the capacitor C7 is set to be lower than the Zener voltage of the Zener diode ZD1 connected to the connector CN2, so that no normal current is conducted to the series circuit of the Zener diode ZD1 and the input portion of the photocoupler PC2.

  The dimming method switching procedure in this example may be the same as that in the fourth embodiment. Either the dimmer 43 or the switch 44 can be connected to the connector CN2. In the case of the dimmer 43, a duty signal having an amplitude of 10 V and a frequency of 1 KHz is input to the connector CN2 as in the fourth embodiment. . According to the duty signal input to the connector CN2, the output stage of the photocoupler PC1 is turned on / off, the transistor Tr1 is turned on / off, and the duty ratio can be varied to continuously adjust the light. For example, when the duty ratio = 0%, the discharge lamp la is turned on at a dimming ratio of 100%, and when the duty ratio = 100%, the discharge lamp la is turned on at a dimming ratio of 50%.

  When the switch 44 is connected to the connector CN2, the discharge lamp la is turned on at a dimming ratio of 100% when the switch 44 is opened, and is turned on at a dimming ratio of 70% when the switch 44 is short-circuited.

  Also in this example, by inputting a dimming method switching signal to a connector to which an external dimming signal is input, even after the lighting fixture using the above-described discharge lamp lighting device has been constructed, It is possible to easily change the dimming method via the optical signal wiring.

(Embodiment 7)
A circuit diagram of Embodiment 7 of the present invention is shown in FIG. Although the configuration of the discharge lamp lighting device is substantially the same as that of the sixth embodiment (FIG. 14), in this example, either the switch 44 or the sensor block 45 can be connected to the connector CN3 and connected to the control power supply circuit 5. A power supply V 1 for operating the sensor block 45 is supplied from the sensor power supply circuit 17. The sensor block 45 may be anything such as a configuration for detecting infrared rays emitted from a person, a configuration for detecting an external light level such as sunlight, and the sensor block 45 is installed on the surface or outside of the lighting fixture.

  The output signal from the sensor block 45 may be a binary signal of H and L, or a DC signal that continuously varies in an analog manner, and is input to the sig terminal of the arithmetic processing unit 6. An input signal to the sig terminal is input to the external signal input unit 16, stored in advance in the memory unit A, and a predetermined duty ratio within the use range of data selected by the dimming data selection unit 10 is a dimming signal. The data is read out to the generation unit 12. On the other hand, the output signal from the sensor block 45 is input to the write terminal via the Zener diode ZD2.

  The dimming method switching procedure in this example will be described. For example, normally, the output signal when the sensor block 45 is connected is 5 V or less. When switching the light control method, a DC voltage of 7 V or more is applied to the output signal wiring from the sensor block 45 to switch the light control method. At this time, by setting the Zener voltage of the Zener diode ZD2 to about 5V, a voltage of about 2V is generated at the write terminal.

  Also in this example, the dimming method can be easily changed by inputting the dimming method switching signal to the connector to which the external dimming signal is input.

(Embodiment 8)
A circuit diagram of the eighth embodiment of the present invention is shown in FIG. The structural features will be described. In this example, the power supply detection circuit 15 that detects the output voltage of the rectifier DB and the output terminal of the step-up chopper circuit 1 are connected, and after the AC power supply AC is turned on, at least the inverter circuit 2 is connected. Is not operating, the starting circuit 18 for supplying the control power to the control power input terminal Vs of the dimming control circuit 4, and the diode D1 from one end of the quaternary winding n4 of the preheating transformer T1 constituting the preheating circuit 50 , Charging the capacitor C7 through the resistor R6, and supplying the control power during the operation of the inverter circuit 2, and the no load connected to the filament of the discharge lamp la and detecting whether the discharge lamp la is mounted A detection circuit 18 is included. The arithmetic processing unit 6 has a Vdet terminal for inputting a detection signal output from the power supply detection circuit 15 and a Load terminal for inputting a detection signal output from the no-load detection circuit 18, and is input to these terminals. A stop processing unit 19 for processing a signal to be processed and a reset processing unit 20 for instructing an operation according to the output of the stop processing unit 19. Further, the inverter operation signal generation unit 13 stops the operation according to the output of the stop processing unit 19 and stops the inverter circuit 2.

  FIG. 17 is a flowchart showing the detailed operation of the arithmetic processing unit 6 in this example. In this example, after the control power is turned on (S1), first, the variable N is set to N = 0 (S2). Thereafter, it is determined whether or not the detection signal input from the power supply detection circuit 15 to the Vdet terminal is equal to or greater than a predetermined value (S3). When the output voltage of the rectifier DB is normal, the detection signal output from the power supply detection circuit 15 satisfies a predetermined value or more. When the detection signal output from the power supply detection circuit 15 is determined to be equal to or greater than a predetermined value, it is determined whether or not the detection signal input from the no-load detection circuit 18 to the Load terminal is equal to or greater than a predetermined value (S4).

  The configuration of the no-load detection circuit 18 in this example is configured such that an L signal is output when the discharge lamp la is not mounted, and when it is determined that the discharge lamp la is not mounted, the configuration is again performed. It is determined whether or not the detection signal input to the Vdet terminal is greater than or equal to a predetermined value (S5). Here, when it is determined that the detection signal input to the Vdet terminal is lower than a predetermined value, that is, the output voltage of the rectifier DB does not reach the normal value, 1 is added to the variable N.

  Thus, every time the AC power supply is repeatedly turned on / off in a state where the discharge lamp la is not mounted, 1 is added to the variable N. When N reaches 3 (S7), the timer unit 11 counts and the memory unit A process of initializing a stored value of a time corresponding to the accumulated lamp lighting time stored in C to 0 is performed (S8).

  When the discharge lamp la is not installed and the AC power supply AC is turned on for T1 and turned off for T2, the output voltage of the rectifier DB becomes as shown in FIG. Is as shown in FIG.

  As described above, since the control power is supplied from the starting circuit 18 to the control power input terminal Vs when the inverter circuit 2 is not operating, if the output voltage of the boost chopper circuit 1 is maintained at a predetermined level or higher, the control power is supplied. Vs is sufficiently supplied.

  If the current consumption of the dimming control circuit 4 when the inverter circuit 2 is not operating is about 1 mA, a current of 1 mA is supplied from the output terminal of the step-up chopper circuit 1 via the starting circuit 18.

  The capacity of the smoothing capacitor constituting the step-up chopper circuit 1 is 33 μF, the output voltage of the step-up chopper circuit 1 is 140 V when the AC power source is on, and the step-up circuit is used to supply control power from the starting circuit 18 to the control power input terminal Vs. Assuming that the output voltage of the chopper circuit 1 is 30 V, if the AC power supply off time T2 is 3.6 seconds or less from 33 μF × (140 V-30 V) / 1 mA, the control power supply is as shown in FIG. . When the AC power supply off time T2 significantly exceeds 3.6 seconds, sufficient control power cannot be supplied. Therefore, when the AC power supply is turned on again, the operation starts from the control power on (S1) in the flowchart of FIG. N is set again as N = 0 (S2).

  Therefore, when the user of the discharge lamp lighting device of this example and the lighting fixture using the same repeats the AC power supply on and off three times continuously so that the AC power supply off time T2 is 3 seconds or less, The stored value of the time corresponding to the accumulated lighting time can be initialized to 0.

  In addition, even if the discharge lamp la is not installed due to lamp cleaning or the like, and the AC power supply is turned ON / OFF by mistake, the lamp is lit unless the AC power supply OFF time T2 is repeated three times within 3 seconds or less. Since the time corresponding to the accumulated time cannot be initialized, the user does not mistakenly initialize the accumulated lamp lighting time.

  Switching of the dimming method in this example is the same as in the second embodiment, and switching to illuminance correction A dimming method, illuminance correction B dimming method, or step dimming by performing a predetermined procedure. I do.

  Although not shown in FIG. 16, a connector that can be connected to the outside of the discharge lamp lighting device is provided at the Test 1 terminal and the Test 2 terminal as in the sixth embodiment, and a switch for switching the output is connected to this connector to adjust the dimming level. You may comprise so that it may perform.

  Further, as shown in FIG. 19, by switching the illuminance correction A and illuminance correction B dimming methods, the dimming ratio at the beginning of lighting is set to 70%, and the time until the dimming ratio 100% is reached In this case, a predetermined time longer than the rated lamp life time may be used, and in the case of the illuminance correction B, the data may be equal to the rated lamp life time.

(Embodiment 9)
Since the configuration is the same as in the eighth embodiment, a description thereof will be omitted. A flowchart showing the detailed operation of the arithmetic processing unit 6 in this example is shown in FIG. Similarly to the eighth embodiment, when the user of the discharge lamp lighting device of this example and the lighting fixture using the same repeats the AC power supply on / off three times without attaching the discharge lamp, the lamp lighting cumulative time Can be initialized to zero.

  Further, in this example, when the AC power supply is turned on / off continuously 8 times (S9), the dimming method is switched and the discharge lamp la is set to light at a dimming ratio of 100% (S10).

  Here, the dimming method is switched when AC power on / off is repeated 8 times in succession, but this number of times is more than 3 times of AC power on / off to initialize the lamp lighting cumulative time. Can be any number of times as long as it is large. When switching the light control method, it is not limited to setting the discharge lamp la to be lit at a light control ratio of 100%, and the light control method for illuminance correction may be switched.

(Embodiment 10)
Since the configuration is the same as in the eighth and ninth embodiments, the illustration is omitted. A flowchart showing the detailed operation of the arithmetic processing unit 6 in this example is shown in FIG. Similarly to the eighth and ninth embodiments, when the user of the discharge lamp lighting device of this example and the lighting fixture using the same repeats the AC power on / off three times without attaching the discharge lamp la, the lamp The stored value of the time corresponding to the accumulated lighting time can be initialized to 0, and when the AC power supply is turned on and off continuously 8 times, the dimming method is switched and the discharge lamp with the dimming ratio of 100% la can be turned on.

  The difference in this example is that the AC power supply AC is turned on during T1 and turned off during T2 when the AC power supply is turned on / off without the discharge lamp la mounted. Whether or not is longer than 10 seconds is determined (S5). In addition, the variable N for adding on / off of the AC power supply AC is not reset to N = 0 immediately after the control power is turned on (S1). The value will be stored.

  This AC power supply AC on / off addition value N is adjusted by switching the dimming method after reading out the dimming method (S22) or repeating AC power on / off eight times in succession. After setting to turn on the discharge lamp la at a light ratio of 100% (S10), N = 0 is reset.

  In this example, as shown in FIG. 22, the AC power supply AC is turned on for T1 and turned off for T2, whereby the output voltage of the rectifier DB becomes as shown in FIG. The output voltage is as shown in FIG.

  As described in the ninth embodiment, when the inverter circuit 2 is not operating, the control power is supplied from the starting circuit 18 to the control power input terminal Vs. Therefore, when the AC power supply off time T2 is long, or the dimming control circuit When the current consumption of 4 is large, the control power cannot be sufficiently supplied. Therefore, as shown in FIG. 22C, the control power source is generated every time the AC power source AC is turned on / off.

  By setting 10 seconds as the upper limit time for the arithmetic processing unit 6 to recognize that the AC power supply is on, the user of the discharge lamp lighting device of this example and the lighting fixture using the discharge lamp can discharge the lamp for reasons such as lamp cleaning. When la is not installed and the AC power supply is turned ON / OFF by mistake, the AC power ON time T1 must be set 3 times within 10 seconds, so the time corresponding to the cumulative lamp lighting time cannot be initialized. Does not accidentally initialize the accumulated lamp lighting time.

  In this example, as shown in FIG. 23, the dimming ratio at the beginning of lighting is set to 70%, and the dimming ratio is controlled to be lowered at regular intervals until the rated life is reached. The cleaning time of the discharge lamp and the lighting fixture can be notified.

(Embodiment 11)
An eleventh embodiment of the present invention will be described with reference to FIG. To explain the structural features, in this example, a capacitive element C6 connected between at least one end of the AC power supply AC and the ground, a connection line between the AC power supply AC and the capacitive element C6, and an output terminal of the rectifier DB And a capacitor C8 connected between any one of the lines, a switching current detection resistor R8 between the source of the switching element Q2 constituting the inverter circuit 2 and the ground, and an arithmetic process constituting the dimming control circuit 4 A signal conversion unit 21 that converts the dimming signal output from the unit 6 into a direct current, and receives the detection signal output from the resistor R8 and the signal output from the signal conversion unit 21; 10, a feedback circuit 22 including R11 and a capacitor C8. The output terminal of the feedback circuit 22 is connected to the Ro terminal of the inverter operation signal generator 13 through a series circuit of a resistor R9 and a diode D2. Furthermore, a resistor R8 is provided between the Ro terminal of the inverter operation signal generator 13 and the ground, and a capacitor C10 is provided between the Cpls terminal and the ground.

  Although the internal circuit of the inverter operation signal generation unit 13 is not specifically illustrated, the internal circuit connected to the Ro terminal may have a buffer circuit configuration that outputs a constant voltage, depending on the current value output from the Ro terminal. The charging current and discharging current of the capacitor C10 are set. The internal circuit connected to the Cpls terminal may be configured to switch between charging and discharging according to the voltage value across the capacitor C10. The voltage across the capacitor C10 has a triangular waveform, and the frequency of this triangular wave Based on the above, a drive signal for the inverter circuit 2 is generated. Therefore, as the current sunk to the feedback circuit 22 increases, the charging current and discharging current of the capacitor C10 also increase and the inclination of the triangular wave becomes steep, so that the operating frequency of the inverter circuit 2 increases.

  By configuring the feedback circuit 22 as in this example, the voltage at the + terminal of the operational amplifier OP1 and the lamp power of the discharge lamp la have a substantially proportional relationship and are stored in advance in the memory unit A and correspond to the dimming ratio of the discharge lamp. Since the data for generating the dimming signal to be used may be the same data regardless of the type of the discharge lamp la, the same discharge lamp lighting device should be used for the discharge lamp lighting devices for different types of discharge lamps. Further, as described in the first to tenth embodiments, the same discharge lamp lighting device can be used in the dimming operation mode.

  Further, in the absence of the capacitor C8, since none of the diodes constituting the rectifier DB is conducted in the vicinity of the zero cross of the AC power supply AC, the high-frequency leakage originally fed back from the discharge lamp la through the capacitive element C6. The current is not fed back in the vicinity of the zero cross of the AC power supply AC, and the noise terminal voltage deteriorates at about 500 KHz to 700 KHz. However, the effect is improved by connecting the capacitor C8.

Embodiment 12
A lighting fixture using the discharge lamp lighting device of the present invention is shown in FIG. As shown in the figure, the appliance main body 101, the socket 102, and the discharge lamp la are included, and the discharge lamp lighting device described in the seventh embodiment is included in the appliance main body. Furthermore, the light receiving part 103 of the sensor circuit 45 is provided near the center of the instrument body, and is connected to the discharge lamp lighting device.

(Embodiment 13)
A lighting fixture using the discharge lamp lighting device of the present invention is shown in FIG. As shown in the figure, the appliance main body 101, the socket 102, and the discharge lamp la are included, and the discharge lamp lighting device described in the first to sixth and eighth to eleventh embodiments is included in the appliance main body.

It is a circuit diagram which shows the structure of Embodiment 1 of this invention. It is a flowchart which shows operation | movement of Embodiment 1 of this invention. It is operation | movement explanatory drawing of Embodiment 1 of this invention. It is operation | movement explanatory drawing of Embodiment 1 of this invention. It is operation | movement explanatory drawing of Embodiment 1 of this invention. It is a circuit diagram which shows the structure of Embodiment 2 of this invention. It is a flowchart which shows operation | movement of Embodiment 2 of this invention. It is a circuit diagram which shows the structure of Embodiment 3 of this invention. It is a figure which shows the external appearance of Embodiment 3 of this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is a circuit diagram which shows the structure of Embodiment 4 of this invention. It is operation | movement explanatory drawing of Embodiment 4 of this invention. It is a circuit diagram which shows the structure of Embodiment 5 of this invention. It is a flowchart which shows operation | movement of Embodiment 5 of this invention. It is a circuit diagram which shows the structure of Embodiment 6 of this invention. It is a circuit diagram which shows the structure of Embodiment 7 of this invention. It is a circuit diagram which shows the structure of Embodiment 8 of this invention. It is a flowchart which shows the operation | movement of Embodiment 8 of this invention. It is operation | movement explanatory drawing of Embodiment 8 of this invention. It is operation | movement explanatory drawing of Embodiment 8 of this invention. It is a flowchart which shows operation | movement of Embodiment 9 of this invention. It is a flowchart which shows operation | movement of Embodiment 10 of this invention. It is operation | movement explanatory drawing of Embodiment 10 of this invention. It is operation | movement explanatory drawing of Embodiment 10 of this invention. It is a circuit diagram which shows the structure of Embodiment 11 of this invention. It is a perspective view which shows the external appearance of the lighting fixture of Embodiment 12 of this invention. It is a perspective view which shows the external appearance of the lighting fixture of Embodiment 13 of this invention.

Explanation of symbols

DB rectifier 1 Boost chopper circuit (DC power supply circuit)
2 Inverter circuit 3 Resonant circuit 4 Dimming control circuit 5 Control power supply circuit 6 Arithmetic processing unit (microcomputer)
7 1st memory | storage means (memory part A)
8 Second storage means (memory unit B)
13 Inverter operation signal generator 14 Drive circuit la Discharge lamp

Claims (9)

A rectifier that rectifies the supply voltage from the AC power supply;
A DC power supply circuit that smoothes the pulsating voltage output from the rectifying unit;
An inverter circuit having at least one switching element and converting a DC voltage output from the DC power supply circuit to a high frequency;
A resonance circuit having at least one resonance inductor and a resonance capacitor, inputting a high-frequency voltage supplied from an inverter circuit, and lighting a discharge lamp by a resonance action;
A dimming control circuit that outputs a drive signal to the switching element of the inverter circuit and determines an operating frequency of the inverter circuit;
In a discharge lamp lighting device comprising a control power supply circuit for supplying control power to the dimming control circuit,
The dimming control circuit includes:
First storage means for storing dimming signal data for generating the first dimming signal in advance;
Second storage means capable of writing dimming data;
The dimming signal data stored in the first storage unit is read in accordance with the dimming method data read out from the second storage unit, and the first dimming signal is calculated in accordance with the selected dimming signal data. Arithmetic processing means to generate and
Frequency generating means for generating an operation signal corresponding to the operating frequency of the inverter circuit in response to the first dimming signal output from the arithmetic processing means;
Drive means for converting an operation signal output from the frequency generation means into a drive signal and supplying the drive signal to the switching element of the inverter circuit;
In accordance with a selection signal based on a predetermined procedure input to the arithmetic processing means, dimming method data is stored in the second storage means,
The selection input unit for inputting the selection signal has a connection terminal for inputting the selection signal from the outside of the discharge lamp lighting device and capable of transmitting an electrical signal. 2. The discharge lamp according to claim 1, wherein a second dimming signal for changing the dimming level of the discharge lamp stepwise or continuously is supplied from the outside of the discharge lamp lighting device and inputted to the connection terminal. Lighting device. The dimming control circuit has time measuring means for measuring the lighting time of the discharge lamp and third storage means for storing the cumulative lighting time, and the arithmetic processing means is a time measuring read from the third storage means. According to the data, a first dimming signal is generated so that the discharge lamp is dimmed as the accumulated lighting time elapses, and the dimming level at the initial lighting accumulated time is set to be switched by the selection signal. The discharge lamp lighting device according to claim 1 or 2. The second dimming signal input to the connection terminal is a DC signal having binary values of H level and L level, and the dimming level of the discharge lamp is switched in two steps according to the second dimming signal. The discharge lamp lighting device according to claim 2, wherein two-stage dimming is performed according to the selection signal. The second dimming signal input to the connection terminal is a duty signal having a predetermined frequency, and the dimming level of the discharge lamp is continuously switched according to the duty ratio of the second dimming signal, The discharge lamp lighting device according to any one of claims 2 to 4, wherein dimming is set to be performed continuously according to the selection signal. A sensor circuit is connected to the connection terminal, and the dimming level of the discharge lamp is switched stepwise or continuously according to the output signal from the sensor circuit, and the dimming corresponding to the output signal from the sensor circuit is performed by the selection signal. The discharge lamp lighting device according to claim 2, wherein the discharge lamp lighting device is set to perform. A power supply detection circuit for detecting an output voltage from the rectifying unit; and a no-load detection circuit for detecting that the discharge lamp is removed from a discharge lamp lighting device; and the control power supply circuit is connected to the DC power supply circuit. A path for supplying control power to the dimming control circuit is provided, the dimming control circuit is configured to stop the operation of the inverter circuit when a no-load condition is detected, and a no-load condition is detected. And reset means for resetting the timing data stored in the third storage means to an initial state when the AC power on / off operation is performed at least three times continuously within a predetermined time, and When a no-load state is detected and the AC power supply is turned on / off a plurality of times, the dimming signal data stored in the first storage means is read so that the discharge lamp is fully lit, and the AC The discharge lamp lighting device according to claim 3, characterized in that the off-time of the source and 3 seconds or less. The rectification unit includes one input of the rectification unit or a first capacitive element connected between both ends and the ground, a connection point between the input of the rectification unit and the first capacitive element, and an output of the rectification unit. A discharge lamp lighting device according to any one of claims 1 to 7, further comprising a second capacitive element connected between the first end and the second capacitive element. The lighting fixture which mounts the discharge lamp lighting device in any one of Claims 1-8.

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