TW566058B - Lighting device of discharging lamp - Google Patents

Abstract

The object is to provide a lighting device of discharging lamp to light the lamp, wherein at least one of plural discharge lamps with about the same rated current and different rate powers can be installed. The lighting device of discharging lamp comprises: a frequency transformer circuit having a pair of switching devices 2, 3 to convert the DC current from the power source 1 into the high-frequency current; a discharge lamp loading circuit L100 formed of a choke coil 5, discharge lamps 6, 10 and coupling capacitor 8 connected in series and a capacitor 7 connected in parallel with the discharge lamps 6, 10; terminal seats a~h to vary the kind and number of connections of discharge lamp 6, 10 and then to vary the connection; secondary windings 5S1, 5S2 disposed on the choke coil 5 and outputting the voltage of a pair of switching devices 2, 3; a f-V conversion circuit 100 to convert the output voltage from the secondary windings 5S1, 5S2 into the DC voltage corresponding to the oscillation frequency; and a control device 101 controlling the current of discharge lamps 6, 10 according to the output of the f-V conversion circuit 100.

Description

566058 V. Description of the invention (1) Technical field of the invention The present invention relates to a discharge lamp lighting device for lighting a discharge lamp using high-frequency power from a self-excited inverter circuit, and relates to an available lighting device. A discharge lamp lighting device installed after changing the combination of the connection number of a plurality of types of discharge lamps having substantially the same rated current and different rated output power. Conventional Technology Fig. 18 shows a circuit diagram of a conventional discharge lamp lighting device. In Figure 18, 1 is a DC power source obtained from a commercial power supply, 2 and 3 are switching elements composed of MOSFETs that constitute an inverter circuit, 5 are current-resistant coils, 6 are discharge lamps, and 7 are capacitors connected in parallel with discharge lamps 6. 8 series coupling capacitors 8, these components constitute the discharge lamp load circuit L100. The CLIlO system has the same structure as the discharge lamp load circuit L100 and is connected in parallel with the discharge lamp load circuit 110. The discharge lamp load circuit is connected by the anti-current coil 9, and the discharge The lamp 10, the capacitor 11, and the coupling capacitor 12 are configured. 4 is a current transformer (hereinafter referred to as CT) connected between the connection points of the two switching elements 2 and 3 and the connection point of the discharge lamp load circuit L10 0 and L110 in parallel, and its secondary winding is connected at As shown in the figure, the CT between the polar connection points of the symbol, its secondary winding 4S1, 4S2 is connected between the gate and source of the switching elements 2 and 3 through the resistor 13 and resistor 14 (in order to show the primary winding of CT4 The coupling with the secondary winding is shown in dotted lines), so that the switching elements 2 and 30N / 0FF are driven alternately in accordance with the polarity of the symbol in the figure. In addition, the built-in equivalent diodes connected in parallel between the gate and source of the switching elements 2 and 3 are omitted. The illustration of the starting circuit for starting the inverter is also omitted.

2148-4934-PF (N) .ptd Page 4 566058 5. Description of the Invention (2) In addition, FIG. 19 shows a configuration example of the DC power supply 1 in the case where a DC power supply is obtained from a commercial power supply. As shown in Fig. 19, the AC power source from the commercial power source is rounded by a diode bridge lb, and then smoothed by a smoothing capacitor to output it to the load circuit as a DC power source. The operation of the circuit of the conventional example shown in FIG. 18 will be described below. In Fig.8, when the DC power supply 1 is applied, the switching elements 2 and 3 are driven at high frequency by using a start circuit (not shown), so that the discharge lamp is turned on. Here, Fig. 4 (a) shows the operation in the case where the two discharge lamps 6 and 10 are replaced with a model A having a rated current equal to or substantially equal to a model b having a low rated voltage. Here, the discharge lamp of model A is, for example, FHT42EX, the rated discharge lamp current is 0 · 320A, the rated discharge lamp voltage is 135V, and the rated discharge lamp power is 42W. The discharge lamp of model B is, for example, FHT32EX, the rated discharge lamp current is 0.320A, the rated discharge lamp voltage is 100V, and the rated discharge lamp power is 32W. As shown in the figure, by changing the discharge lamps 6 and 10 from model A to model B, the voltage across the discharge lamp decreases. As the voltage decreases, the current flowing in the anti-coil 5 and anti-coil 9 increases. The current of the CT4 flowing through the combined current of the two anti-coil coils also increases. Problems to be solved by the invention · However, in the conventional discharge lamp: lighting device, when the current flowing in CT4 increases, its secondary winding voltage increases, compared with the case of installing a type A discharge lamp, with low oscillation Frequency lighting, the electric power of the discharge lamp is higher than the rated voltage. That is, a model with a high rated voltage when a discharge lamp is installed in this lighting device

2148-4934-PF (N) .ptd Page 5 566058 V. Description of the invention (3) The discharge lamp of A is set in such a state that the rated power becomes the best, > the rated current is approximately equal and the rated voltage is low When the discharge lamp of the type B is used, the current of the discharge lamp increases, and there is a problem that the operation state exceeds the rated power of the discharge lamp of the type B. In addition, not only the discharge lamp replacement, but also when the discharge lamp of one of the discharge lamp 6 or the discharge lamp 10 is unplugged, the current flowing in CT4 is reduced, which has a frequency compared with the case where the two lamps are fully installed. Increasing and reducing the output power of the remaining discharge lamp. In addition, a CT for driving the switching element is required, which has a problem that the lighting device is expensive and becomes large. In order to solve the above-mentioned problems, a first object of the present invention is to provide a lighting device, which can be installed with a plurality of discharge lamps, and can be installed with a plurality of discharge lamps having substantially the same rated current and different rated output power. A second object of the present invention is to provide a lighting device. A discharge lamp lighting device equipped with a plurality of discharge lamps leaves at least one lamp and pulls out 2 other discharge lamps. The remaining discharge lamp may correspond to its type. Lights up with an output power approximately equal to the case of full installation. A third object of the present invention is to provide a lighting device. In a discharge lamp load circuit, among a plurality of discharge lamps having a rated current that is equal to or substantially equal to, a series of a plurality of discharge lamps belonging to a type having a low rated voltage belongs to Connect a discharge lamp of a type with a high rated voltage. A fourth object of the present invention is to provide a lighting device which can reduce the number of electrical wirings from a discharge lamp to a lighting device when a plurality of discharge lamps are connected. Problem solving

2148-4934-PF (N) .ptd Page 6 566058

Circuit book ί: ΐ ί ϋLighting device, including: DC power supply; inverter has a pair of switching ^ ΐ 1L power supply DC to high-frequency current with U-turn = = Cheng; discharge lamp load circuit by discharge lamp Capacitors connected in parallel: = = = == 该 = ΐType t connection after number of connections; secondary winding resistance, set at the electric S of the piece ;, fv iron the current-resistant coil, the output drives the pair of switching elements as and Li Zhen Tang Nan to the circuit, the output voltage conversion from the secondary winding

Λ Λ output controls the current of the discharge lamp; using the connection device is approximately equal and the rated voltage and rated discharge lamp power are irrespective of the number of connections of the discharge lamp, so that the output power corresponding to the respective rated output power of the discharge lamp is lit.

In addition, it includes: a DC power supply; an inverter circuit composed of a half-bridge circuit with a pair of switching elements that converts the DC current from the DC core to a south frequency current; a plurality of parallel discharge lamp load currents &, Composed of a discharge coil using a high-frequency current lamp from the inverter circuit, a discharge lamp and a series circuit coupled with a capacitor in series and a capacitor connected in parallel with the discharge lamp; a connection device is provided in the load circuit Can be connected after changing the type and number of connections of the discharge lamp; secondary windings, each of which is set in the anti-current coil of the discharge lamp load circuit, to output the voltage driving the pair of switching elements; fv conversion circuit, from the two The output voltage of the secondary winding is converted into a DC voltage corresponding to its oscillation frequency, and the control device is in accordance with the f-v conversion circuit.

2l48-4934-PF (N) .ptd Page 7 & Description of Invention (5) ----------- Let's put it! The current of the lamp; w Use this connection device to connect the rated current of two, the rated voltage, the voltage of the discharge lamp, and the time of the discharge lamp = the discharge lamp load circuit, connected to the respective discharge lamp load circuit :: the discharge lamp The sum of the rated voltages becomes approximately equal, regardless of the number of connections and the number of connections, so that the output power is turned on with the output power corresponding to the rated output power of the discharge lamp. c 'also includes: a DC power supply; an inverter circuit composed of a half-bridge circuit with a pair of switching elements that converts DC supplied from the DC power supply to high-frequency current; a plurality of discharge lamp load circuits connected in parallel, The flow coiler is composed of a discharge lamp with high-frequency current lighting from the inverter circuit, a series circuit coupled in series with the sigma valleyr, and a capacitor connected in parallel with the discharge lamp; the connection device is provided in the load circuit, and can be Connect after changing the type and number of connections of the discharge lamp; secondary windings, each of which is set in the anti-coil of the discharge lamp load circuit to output the voltage that drives the pair of switching elements; f a ν conversion circuit from the two The output voltage of the secondary winding is converted into a DC voltage corresponding to its oscillation frequency; and the control device controls the current of the discharge lamp in accordance with the wheel-out of the f-V conversion circuit; the connection device is used to connect the rated current to be approximately equal to the rated voltage When the discharge lamps with different rated discharge lamp powers are used, the discharge lamps in the respective discharge lamp load circuits are caused to have the discharge lamps in the respective discharge lamp load circuits. Groups and the same, regardless of the number of the discharge lamp is connected, so that the discharge lamp and to each of the rated output power of the output power corresponding to the lighting. In addition, by using the connection system of the discharge lamp of the load circuit of the connection device, a plurality of discharge lamps with a low rated voltage are connected in series, and at least one discharge lamp with a high rated voltage is connected.

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The clever clothes are placed so that it can be twisted and soiled. When connecting several discharge lamps, connect: select the connection 'secondary winding set in the coil of the discharge lamp load circuit to prevent the current in the discharge lamp load circuit. Each lamp of the lamp is heated, and the voltage is applied to each discharge filament connected to the lamp. When connecting a discharge lamp, connect it so as not to negatively charge the lamp === when there is a plurality of ′, determine the frequency and vibration frequency of the plurality of 峪 autumn electricity 峪. Existence; often = multiple secondary windings of the switching element of the circuit. The voltages at the time of positive lighting are determined to be approximately equal.

Also, connect the anti-current and coil between the lamp and the surface-mounted capacitor. In addition, it includes a pole body, the anode port is connected to the J terminal of the coupling capacitor, and the cathode is connected to the positive pole of the DC power supply;]: the pole body's cathode is connected to the terminal that is not connected to the DC power supply of the surface-mounted capacitor, and the anode Connect to the negative terminal of the DC power supply. Further, the f-v conversion circuit is provided with a pressure reducing device which reduces the output voltage of the f_v conversion circuit by only a predetermined value. In addition, the lower the oscillation frequency of the inverter circuit, the larger the output voltage becomes.

Embodiment of the Invention Embodiment 1 FIG. 1 is a circuit diagram showing a structure of a discharge lamp lighting device according to Embodiment 1 of the present invention, and FIG. 2 is an operation waveform diagram. In the figure 丨, 丨 are the DC power sources obtained from commercial sources ′ 2 and 3 are switching elements composed of MOSfeT, which constitute the inverter circuit, and L100 is the discharge lamp load circuit. Load circuit in discharge lamp

566058

Ll 00, 5 series current-resistant coils, 6 series discharge lamps of type A connected through sockets (not shown) and terminal blocks a, b, c, d, 0 through the sockets and terminal blocks e, f, g The discharge lamp of type A connected with h, 7 is a capacitor connected between terminal block b and terminal block h, and 8 is a coupling capacitor connected between terminal block g and the negative electrode of DC power supply 1. 5S3 is the secondary winding resistance of the current-resistant coil 5, one end of which is connected to the terminal block e, and the other end is connected to 0 through the capacitor 15 and the terminal block c. The secondary winding resistances of 5 S1 and 5 S 2 are connected between the gate and source via resistors 丨 4 and 丨 3 respectively to open and close the switching elements 2 and 3 (to indicate the primary winding of the anti-winding coil 5 The dotted line diagram of the coupling of resistance and secondary winding). In addition, the discharge lamp of model A is, for example, FHT42EX, the rated discharge lamp current is 0 · 320A, the rated discharge lamp voltage is 135V, and the rated discharge lamp power is 42W. ′ And ′ are omitted, and the illustration of a built-in equivalent unipolar body connected in parallel between the drain and source of the switching elements 2 and 3 is omitted. Also, the illustration of the starting circuit for starting the inverter is omitted. 1 00 is a frequency-voltage conversion device conversion circuit that converts the oscillation frequency to a DC voltage. 101 is to control the discharge lamps 6, 1 by changing the oscillation frequency of the switching elements 2, 3 according to the input of the fv conversion circuit 100. Control circuit of current control device. In the f-V conversion circuit 100, the 50 series anode is connected to the secondary winding 5 S2 of the anti-current coil 5 and the cathode is connected to one end of the capacitor 52, and the other end of the capacitor 52 is connected to the negative terminal of the DC power supply 1. 53 series one end and two poles

566058

The cathode of the body 50 is connected to the anode of the zener diode 54 and the anode of the anode 54 is connected to the cathode of the DC power source 1. 55 * and Zener diode 54 are connected in parallel, and 7. The mountain winding system is connected to the secondary winding 5S2 and the other electrical R system is connected to one of the resistance coils 5 ", which is connected to one of the resistance 56 terminals. The other end of the Leiyang resistor 56 and the DC power supply! The negative connection resistor. The 5 9 series transistor ’has its emitter connected to the negative pole of the DC power source i and the connection between the resistor 5 6 and the resistor 5 7. ^ _ Λ Earth electrode-the cathode of the pole body 54. 61 series capacitors connected to transistor = 62 series operational amplifiers (hereinafter referred to as 0p input: the collector connection of the sub-transistor 59, the inverting input, and the cathode connection. 0PAMP62 output and output and diode The anode connector 65 of 63 is a device connected between the cathode of diode 63 and the negative electrode of DC power supply 0 ▲ In the control circuit 101, 67 is a resistor connected in parallel with capacitor 65, and 69 is a variable one-terminal regulator , 6 8 is a resistor connected between the inverting input terminal and the cathode of the variable three-terminal regulator 69, 70 is a resistor connected at one end to the cathode of the variable three-terminal regulator 69, and the other end is connected via The cathode of the diode is connected to the gate of the switching element 3. In addition, the variable three-terminal voltage regulator is, for example, the Hitachi HA1 743 1 series. The following describes the first embodiment of the present invention with reference to Figs. The basic operation of the discharge lamp lighting device. Fig. 2 (a) shows the voltage of the electric valley device 61 when the oscillation frequency is low. Fig. 2 (b) shows the voltage of the capacitor 65 corresponding to Fig. 2 (a). c) shows the voltage of capacitor 61 when the oscillation frequency is high. Figure 2 (d) shows the voltage of capacitor 65 corresponding to Figure 2 (c). Voltage.

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In FIG. 1, when the DC power supply 1 is supplied, the starting circuit (not shown) is used to mutually drive the switching elements 2 and 3 'in series to discharge lamps 6 and discharge lamps 10 in series. At this time, in the fv conversion circuit 100, the voltage of the positive and negative reversal every half cycle of the resistance 59 of the primary winding of the transistor 59 is input to the winding 5 of the reactor 5 once every half cycle. N, 0FF. As a result, during the period of the transistor 590 F F, a triangular wave integrating the voltage shown in FIG. 2 (a) with the sum resistance 60 was obtained at both ends of the valley device 61. The peak voltage of the triangular wave becomes large when the OFF period of the electric body 59 is long, and becomes short as shown in Fig. 2 (c) when it is short. Because the peak voltage of the voltage of the capacitor 61 is detected by the OP AMP6 and the diode 63, a DC voltage corresponding to the peak voltage of the triangular wave of the capacitor η is obtained at both ends of the capacitor 65. i2 (b) and Fig. 2 (d) correspond to the triangular waves in Fig. ^ a) and Fig. 2 (c), respectively. That is, a DC voltage corresponding to the oscillation frequency is obtained in the capacitor 65. Secondly, the case where the two discharge lamps 6 and 10 of model a in FIG. 1 are replaced with discharge lamps having the same rated current and lower rated voltage, and two discharge lamps of model B will be described with reference to Figs. In FIG. 3, the discharge lamps 6 and 丨 of the type β are, for example, FHT32EX's rated discharge lamp current is 0.32A, the rated discharge lamp voltage is 100 ¥, and the rated discharge lamp power is 32%. Fig. 4 (3) is a conventional example, and Fig. 4 (1 ^ is an operation characteristic diagram of the discharge lamp lighting device of Embodiment 1. Here, the basic operation will be described based on Fig. 4, and conventionally shown in Fig. 4 (a), When the discharge lamp is replaced with a discharge lamp of model A with a high rated voltage and a discharge lamp of model B with a low rated voltage, the lamp is lit at a lower oscillation frequency than that of the discharge lamp of model a, and the discharge lamp current is Increase, the power of the discharge lamp of model B is increased than the rated power (WLB), but the discharge in this embodiment

2148-4934-PF (N) .ptd Page 12 566058 V. Description of the invention (10) The lamp device uses the V conversion circuit 1 〇〇 and the control circuit 1 〇1 as shown in Figure 4jb) = to increase the discharge of model B The oscillation frequency of the lamp reduces the discharge lamp power / 'IL _ so that I: the oscillation frequency of the discharge lamp of the model A and the discharge lamp current n' so that the power (WLB) of the discharge lamp of the model B will not exceed the rated power ( WL d) ° As shown in Fig. 3; 'When replaced with a discharge lamp of type b with a low rated voltage, as shown in Fig. 4fa), the oscillation frequency of the inverter circuit becomes lower, and the capacitor 65 = ^ becomes larger than the model The voltage of the discharge lamp of A is high, but here: if the resistance 68, 67 of the selected control circuit 101 and the variable three-terminal voltage regulator 69 are set to the height of the discharge lamp of model a If the oscillation frequency does not work, the cathode voltage will decrease when it corresponds to the low oscillation frequency of the type B discharge lamp. Therefore, because the current driving the gate of the switching element 3 is bypassed via the diode 7 i, the resistor 70, and the variable three-terminal regulator, the conduction period of the switching element 3 is only short. That is, as shown in FIG. 4 (b), the oscillation frequency becomes higher, and it is possible to suppress an increase in the current of the discharge lamp in the case of a replacement type B discharge lamp. Here, if the DC output voltage characteristics relative to the oscillating frequency of the fV conversion circuit 100 and the resistance of the control circuit 1 01 6 7, 6, 8 and 7 are appropriately selected, the case where a discharge lamp of type B is installed The discharge lamp power becomes its rated output power, and the discharge lamp corresponding to its rated output power can be turned on by installing the discharge lamp of model A or the discharge lamp of model b. Because the filament of the discharge lamp 6 connected through the socket and the terminal bases c and d of the discharge lamp 6 and the filament of the discharge lamp 10 connected through the socket and the terminal bases e and f of the discharge lamp 10 are twice in the anti-current coil 5 Add voltage generated by winding 5S3

Page 13 2148-4934-PF (N) .ptd 566058

V. Description of the Invention 〇i) Heat can prevent early filament breakage and early blackening of the lamp wall caused by cold start of the filament. Therefore, it is explained that the two discharge lamps 6 and 10 of model A are replaced by the discharge lamps shown in FIG. 5 with a substantially equal rated current and a high rated voltage. Happening. In this case, as shown in the figure, a discharge lamp is mounted. One end of the discharge lamp 6 is mounted on the terminal blocks a, b, and the other end is mounted on the terminal blocks g, h. The terminal blocks c, d, e, and f and the filaments of the discharge lamp 6 are not connected. Here, the discharge lamp of model C is, for example, FHT57EX, the rated discharge lamp current is 320A, the rated discharge lamp voltage is 182V, and the rated discharge lamp power is ^ / '. · In addition, the rated voltage of 182V and the total voltage of the rated voltage of 100V for the discharge lamps 6, 7 of type B shown in i | 3 are approximately equal to 200V. ^ Therefore, at least one discharge lamp with a high rated voltage is connected. By the function of the f ~ v conversion circuit, the current of the discharge lamp of type c can be controlled at about the rated current. In addition, since the terminal blocks c, d, and e are used, no loss is caused by the current-resistant coil 5. When the filaments of f, f and discharge lamp 6 are not connected, the voltage generated by the secondary winding 5S3 and the rated current of the fn mechanical discharge lamp are large, and the type with the smallest rated voltage when the road is operated when a different electric lamp is installed (Model) The long shot confirms in advance the conditions of the circuit of the discharge lamp lighting device, the temperature rise of the discharge lamp lighting device, and so on. The fv corresponding to the oscillation frequency of the oscillation circuit of the inverter.

566058 V. Description of the invention (12) " -------- 00 The characteristics of the output power of the inverter are obtained from the oscillation circuit of the inverter: 'The lower the member f, the greater the output power, which makes the inverter circuit oscillate. Frequency change 冋 'can only act in the direction of suppressing the current of the discharge lamp. Therefore, 'the characteristic opposite to the characteristic of the f-v conversion circuit 100, that is, the method of increasing the current of the discharge lamp and the rated output power suitable for the discharge lamp' can make the conversion circuit 100 safer for the failure mode. As shown above, according to this embodiment, not only can one replace a plurality of (types; discharge lamps) with approximately equal rated currents and different rated voltages, but also by appropriately selecting a lighting device connected to the discharge lamp. The terminal block can be turned on regardless of 2 lamps or 1 lamp. In addition, when the switching element is driven by the secondary winding 5S2 of the current-resistant coil 5, the voltage is also used as the detection and the oscillation frequency detection of the inverter circuit. The power supply of the voltage fV conversion circuit can be cheap and miniaturized with a simple structure of the power supply of the replaceable circuit. In addition, the characteristics of the output power of the fV conversion circuit 100 get the lower the output frequency of the oscillating circuit. The larger the power, the higher the frequency of the inverter: the higher the frequency of the discharge lamp, the lower the characteristics of the discharge lamp and the characteristics of the fV conversion circuit 100, which will increase the discharge lamp and make it suitable for the discharge lamp. Compared with the method of outputting power, the two f-V conversion circuit 100 is safer for the failure mode. Therefore, it is cheap and compact because it does not need a special one for driving the switching element. Make

In addition, in the case of two discharge lamps connected in series, the filament of the discharge lamp is heated by using a current-resistant coil 5 A winding 5S2, which can prevent the cold starting of the filament-Gong Guang

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The early disconnection of the starting filament and the early blackening of the discharge tube wall. At the same time, by properly selecting the terminal block, when the lamp is connected, it can suppress the unhelpful loss caused by the secondary winding 5S3. In addition, FIG. 1 showing the circuit of the first embodiment illustrates a case where the switching elements 2 and 3 are configured by n-channel MOSFETs. However, the switching element 2 is configured by a 0-channel MOSFET. The channel _SFET constitutes the so-called complementary structure of the switching element 3. The voltage generated by the secondary winding 5Si of the anti-current coil 5 is used as the common driving power for the two switching elements, and the fV conversion is set at the secondary winding 5S1. The circuit 100 and the control circuit 100 also have the same effects as those of the first embodiment. Also, in this embodiment, the types of the discharge lamps 6 and 10 of the f-V change and change circuit 100 are the same, but the types may be changed as the total voltage becomes approximately equal. Embodiment 2 Fig. 6 is a circuit diagram showing the structure of a discharge lamp lighting device according to Embodiment 2 of the present invention. In FIG. 6, elements having the same functions as those in the first embodiment are denoted by the same reference numerals, and a description thereof will be omitted. In FIG. 6, L100a is a discharge lamp load circuit having the same structure as the discharge lamp load circuit L100. 5a series current-resistant coils, 10a series type A discharge lamps, 7a series capacitors, 8a series coupling capacitors, 5aS3 series current-resistant coils 5a secondary winding, 1 5a series capacitors, and discharge lamp load circuit L100 The constituent elements correspond. In addition, the case where the discharge lamp of model A is attached to the discharge lamps 6, ι0, 6a, and 10a is shown. Here, the discharge lamp of type 鸪 a is, for example, FHT42EX, the rated discharge lamp current is 0.32oα, the rated discharge lamp voltage is 135V, and the rated discharge lamp power is 42W.

566058

The terminal blocks al, bl, cl, dl, el, fl, gl, and hl correspond to the terminal blocks a, b, c, d, e, f, g, and h, respectively. The secondary windings 5aS1, 5aS2, and 5aS3 of the anti-current coil 5a correspond to the secondary windings 5S1, 5S2, and 5S3 of the anti-current coil 5a, respectively. In addition, 16 and 17 are resistors corresponding to the resistors 13 and 4 respectively, so that the voltages generated in the secondary windings 5aS1 and 5aS2 of the current-resistant coil 5a and the secondary windings in the current-resistant coil 5 are connected via these resistors The gates of 5Si and 5§2 drive the switching elements 2 and 3 in parallel. In addition, the f_v conversion circuit 1 0 0 5 5 1 series is connected to the secondary winding 5as 2 of the anode 5 and the reactor 5 a, and its cathode is connected to the cathode of the diode 50. In addition, 58 is a resistor connected at one end to the secondary winding 5aS2 of the current-resistant coil 5a, and the other end is connected to the connection point between the resistor 57 and the resistor 56. The operation of the discharge lamp lighting device according to the second embodiment of the present invention will be described below with reference to FIG. In Fig. 6, when the DC power supply 1 is supplied, the switching elements 2 and 3 are driven at high frequency alternately by using a start circuit (not shown), and the discharge lamps 6 and 10 and the discharge lamps 6a and 10a in series are turned on. In this case, the drive switching elements 2 and 3 are driven in parallel with the voltages generated by the secondary windings 5aS1 and 5aS2 of the current-resistant coil 5a and the voltages generated by the secondary windings 5S1 and 5S2 of the current-resistant coil 5 because fV The conversion circuit 100 obtains the frequency signal generated by the windings 5S2 and 5aS2 at one time of the anti-current coils 5 and 5a with the voltage of the resistance 57 or 58 lines or the voltage. Type a rated current lighting. Here, the discharge lamp of a discharge lamp load circuit is pulled out due to a life failure or the like. It is also because of the secondary windings 5aS1, 5aS2 and the primary windings 5S1, 5S2 of the current-resistant coil 5a. Generated voltage in parallel

2148-4934-PF (N) ptd page 17 ^ 566058 V. Description of the invention (15) Drive switching elements 2, 3, the drive voltage from one of the anti-coil coils 5 and 5 a disappears, so long as it is discharged One of the remaining discharge lamp load circuits of the lamp load circuit L1 〇〇, u 〇〇a is normally lit, because it can be regarded as a circuit substantially the same as that in Embodiment 1, and can be driven at a frequency corresponding to the type A of the discharge lamp. , Can be lit with the rated current of the discharge lamp type A. Next, according to FIG. 7, the case where all the discharge lamps installed in the discharge lamp load circuit are replaced from the type A to the discharge lamps with the same or approximately the same rated current, and the type B discharge lamps having a low rated voltage will be described. In Fig. 7, the discharge lamp of type B is, for example, FHT32EX, the rated discharge lamp current is 0.320A, the rated discharge lamp voltage is 100V, and the rated discharge lamp power is 32W. In this case, the driving switching elements 2 and 3 are connected in parallel with the voltage generated by the primary winding 5 a S1, 5 a S 2 of the reactor 5 a and the secondary windings 5S1 and 5S 2 of the reactor 5 due to fV The conversion circuit 100 obtains the frequency signal generated by the secondary windings 5S2 and 5aS2 of the anti-current coils 5 and 5a with the voltage of the resistance 57 or 58 wires or as shown in the first embodiment. It is driven at a frequency corresponding to B, and can be lit at the rated current of the discharge lamp model B. In addition, a description will be given of a case where the discharge lamp load circuits lioo and L100a are replaced with a discharge lamp of the type C whose rated current is equal to or substantially equal to that of the type A and the rated voltage is based on FIG. 8. The state of mounting a discharge lamp is shown in the figure. 'One end of the discharge lamp is mounted on the terminal blocks a, b, al, bl, and the other end is mounted on the terminal blocks g, h, gl, hl. The filaments of the discharge lamp are not connected to the terminal blocks c, d, e, f, c 1 ′ d 1, e 1, f 1. Here, the discharge lamp of model c is, for example, FHT57EX, the rated discharge lamp current is 0.32oα, the rated discharge lamp voltage is 182V, and the rated discharge lamp power is 57w. In addition, rated

566058 V. Description of the invention (16) The voltage 182V and the sum of the rated voltages of 100V of the discharge lamps 6, 7 of model B shown in Fig. 6 are approximately equal to 200V. Therefore, by connecting a discharge lamp with a high rated voltage and utilizing the function of the f-V conversion circuit, the current of the type C discharge lamp can be controlled by lighting with a substantially rated current. As shown above, if one of the plurality of discharge lamp load circuits L100 and L100a is unplugged according to this embodiment, the discharge lamp current of the remaining discharge lamp load circuits may not change, and In order to save power, only one discharge lamp load circuit of the plurality of discharge lamp load circuits is left, and the discharge lamp current of the remaining discharge lamp load circuits can be normally turned on. In addition, since a dedicated CT for driving the switching element is not required, it can be made cheap and compact. In addition, when the same discharge lamp is installed, if the resonance frequency of a plurality of discharge lamp load circuits and the respective secondary winding voltages of the plurality of anti-winding coils are selected to be approximately the same, f-V conversion circuit 1 〇〇 The output characteristics also become substantially the same, which can reduce the difference in characteristics when different discharge lamps are installed between a plurality of discharge lamp load circuits. -In addition, in this embodiment, the discharge lamp load circuit is used to make the discharge lamps 6, 10, 6a, and 10a of the same type as L100a, but the types are changed so that the discharge lamp load circuits L100 and L100a are discharged. The total voltage of the lamps may be substantially equal to each other. Note that, in FIG. 6 showing the circuit of the second embodiment, the switching elements 2 and 3 are configured with 0-channel M0SFETs, but the switching element 2 is configured with n-channel M0SFETs and the switching element 3 is configured with p-channel M0SFETs.

566058 V. Description of the invention (17) The so-called complementary structure uses the voltage obtained by paralleling the voltages generated by the secondary windings 5S1 and 5aS1 of the current-suppressing coils 5 and 5a via a resistor as the common feature of the two switching elements. The driving power supply also includes the f-V conversion circuit 100 and the control circuit 101 in the secondary windings 5S1 and 5aS1. The same effects as those of the second embodiment are also obtained. Embodiment 3 λ Fig. 9 is a circuit diagram showing a structure of a discharge lamp lighting device according to Embodiment 3 of the present invention. In FIG. 9, the elements having the same functions as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Fig. 9 shows the connection points of the cathodes and discharge lamps 10 and the coupling capacitor 8 shown in Fig. 1 shown in the embodiment 1. The anodes and the anodes of the DC power supply 1 are connected to the two poles. The 21 series of anodes and discharge lamps. 10 is connected to the connection point of the coupling capacitor 8, and the cathode is connected to the positive pole of the DC power source. The models to which the discharge lamps 6 and 10 are mounted are, for example, the same model as the model a. = 9, send DC power! Day win, use the omission of the starting electric name = parent; drive switching elements 2 and 3, the discharge quality of the discharge lamp 6, 10 points in series: one of the 6 or * 10 due to the filament Due to its equivalent impedance, the discharge current of the discharge lamp decreases. However, the performance becomes larger. The resonance of the rhyme capacitor @ 8 of the discharge lamp load circuit u 〇 〇 and the current flowing from the circuit L100 increase, which is coupled to Γ: The life is larger than that when normal lighting. Voltage. At the end of life, the value of the coupling capacitor valley is 15 so that the positive voltage of the discharge lamp is greater or the peak value of the voltage of the generator is lower than that of the DC power supply.

566058 V. Description of the invention (18) '---- The body 20, 21 flows in and out from the DC power supply 1. If the forward voltage drop of the diode "2, 21" is ignored, the voltage of the coupling capacitor 8 will not increase. As much as the voltage of the DC power supply 1 or more, as a result, it is possible to suppress the increase of the electric power of the load circuit of the discharge lamp. That is, according to the third embodiment, the use of the newly added diodes 20 and 2 can suppress the discharge. The current at the end of the lamp life increases, and the role of the fV conversion circuit and the control circuit at the same time as the lamp is used. 01: The situation of different types of discharge lamps can also be controlled to ΐ: The current corresponding to the rated current of the electric lamp. 1 Fig. 1 0 is the diodes 20 and 21 described in the electric circuit 9 of Fig. 5 described in the first embodiment: "The circuit diagram newly adds the current of the electric lamp load circuit L100 in the diagram, and at the same time, it can suppress the discharge when expected. The rated current of the lamp c. Controlled by a discharge example 4 Figure 10 is a circuit diagram showing the date of the current month: # Manufacture. In Figure 10, the components of the lighting device of the discharge lamp ^ are the same Symbols indicate that omitting K, which is the same as FIG. 6 of Embodiment 2, is shown in FIG. The load circuit L100 shown in Example 2 is newly added with T = 6 / electricity in FIG. 9 and the diodes 20 and 21 are newly added to the negative lamp load circuit L100a of the discharge lamp to suppress the discharge lamp load at the end of the lamp life- The pole body 20 "..., the electricity of the rated electric quenching circuit of the discharge lamp installed in the discharge is ~ increased, and at the same time, the controllable embodiment 5 ^ ° 2148-4934-PF (N) .ptd $ 21Page 566058 5 Explanation of the invention (19) Fig. 13 shows the structure of the discharge lamp and lighting device of the thunder gland r θ Γ made by the actual invention of the present invention? The waveform diagram illustrating its operation. In FIG. 13, the components of the province 虼 a ^ ^ ^ j are represented by the same symbol, and the nano-diode 'is the cathode and the collector of the transistor 59 and the positive-phase output of the OP 2 and the terminals are connected. The new addition and subtraction will be described below with reference to Figs. 13 and 14-Operation of the lamp lighting device Embodiment 5 of the present invention / jN ^ ^ ^ ^ ^ ^ Figure 4 (a) shows the conversion coefficients of the fv conversion circuit. The figure (e) of the voltage of the t-producer 61 of the large i represents the voltage of the capacitor 65 corresponding to the change 1C of the f-v conversion circuit. Road to Ϊ: When DC power supply 1 is used, the starting power (not shown) is used to drive the switching elements 2 and 3, so that the discharge lamp is turned on. Mingsuo = After different types of discharge lamps are installed, as described in Embodiment 1, ^: the frequency of the oscillation changes. Let the change of the oscillation frequency be △ f, and the output change of f — V conversion circuit 100 due to the drag change of vibration / fv # is Δν. The conversion coefficient of the frequency == AV / Af, the larger the conversion coefficient Different output; the greater the change in the output voltage, the greater the discriminative performance of the type of electric lamp. On the other hand, if the values of the resistance 60 and the capacitor 61 are appropriately selected and the characteristics of the graph (c) are changed from the graph, the absolute value of the conversion coefficient 疋 and the output voltage of the f-V conversion circuit 100 at the same frequency also increases. 7 θ j 疋 ’is fixed by the normal-phase wheel voltage built in the variable three-terminal regulator 69. If a Zener diode with Zener voltage ZD is added,

566058 V. Description of the invention (20) 80, as shown in (b), by making the transformation coefficient Δν / larger, the same output voltage can be obtained. As shown above, according to this embodiment, since the conversion coefficient of the V conversion circuit can be made larger, it can be made to have different discriminating performance of different types of discharge lamps. In addition, instead of the variable three-terminal regulator 69, a general-purpose 0p AMp is used.

It = Due to the limitation of its input terminal voltage, the same effect can be obtained by inserting a Zener diode 80. In addition, in the fifth embodiment, the discharge lamp load circuit L1 is changed as shown in the circuit diagram of FIG. 9 of the third embodiment. At the point of the discharge lamp 10 and the surface capacitor 9 1 #, the positive pole of the DC power supply 1 and The structure in which the diodes 21 and 20 are connected between the negative electrodes also obtains the same effect. Embodiment 6 ^ ϋ ^ represents the structure of the discharge lamp lighting device of Embodiment 6 of the present invention: shaking in your field. Figure 16 is a waveform diagram to explain its operation. In FIG. 15, the P-pole connection & the new homogeneous body, the cathode and the diode 63 are connected together, and the inverting input terminal of the variable three-terminal voltage regulator is connected to the light point G 2 =, 16 indicating that The embodiment of the present invention has a small discharge. Fig. 16 (a) shows the voltage of the electric valleyr 61 of the conversion coefficient container 65 of the f-V conversion circuit, and Fig. (B) shows the correspondence with Fig. (A) (C) shows the voltage of the capacitor with large conversion coefficient in the f-V conversion circuit, the voltage of the main figure, and U) of the capacitor corresponding to (C). The J of the capacitor 65 corresponds to a Zener diode. 81 cut off at the time of the voltage in Figure (d)

2148-4934-PF (N) .ptd Page 23 566058 V. Description of the invention (21) The anode voltage of the nano-diode 81. When the DC power supply 1 is sent to FIG. 15 ', the switching elements 2 and 3 are driven at high frequency alternately by using a start circuit (not shown), so that the discharge lamp is turned on. After changing the discharge lamps of different types, the vibration frequency changes as shown in the description of the first embodiment. As shown in the explanation of the fourth embodiment, when the conversion coefficient Δν / of the f-V conversion circuit 100 is increased, the absolute value of the output voltage of the fV conversion circuit 100 at the same frequency is also increased from FIG. 16 (b). To the figure (d). However, because the voltage of the non-inverting input terminal built in the variable three-terminal regulator 69 is fixed, if a Zener diode 81 having a Zener voltage ZD is added, as shown in FIGS. 16 (d) and (e), The number of conversions is also increased, and the same output voltage can be supplied to the inverting input terminal of the variable two-terminal stabiliser 69. As shown above, according to this embodiment, since the conversion coefficient of the f-V conversion circuit can be made large, it can be used as a discriminating performance of different types of discharge lamps with excellent performance. Also, in the case of using a general-purpose OP AMP instead of the variable three-terminal regulator 69, the input terminal voltage is limited, and the same effect can be obtained by inserting a Zener diode 8 1. In addition, in the sixth embodiment, the discharge lamp load circuit 11 is changed to the circuit diagram of FIG. 9 showing the third embodiment. At the connection point between the discharge lamp 10 and the coupling capacitor 8 and the positive electrode of the DC power supply 1 A structure in which the diodes 21 and 20 are connected between the negative electrode and the negative electrode also achieves the same effect. ‘Embodiment 7 FIG. 17 shows the electric power of a discharge lamp lighting device according to Embodiment 7 of the present invention.

2148-4934-PF (N) .ptd Page 24 566058 V. Description of the invention (22) '" ------- " In FIG. 17, the same elements as those in the diagram of Embodiment 4 are denoted by the same reference numerals, and the description is omitted. This embodiment is shown in the fourth embodiment; the discharge lamp load circuit shown in Figure 11 is the replacement sequence of the discharge lamp and the discharge lamp connected in parallel with the capacitor. That is, the connection points of the self-switching element 23 and the discharge lamp in parallel with the capacitor, the current-proof coil, and the coupling capacitor are arranged in this order. With the configuration shown in FIG. 17, if the lighting device is connected to the terminal block a of the connection 2 electric lamp 6 through the wiring CU1, it can be connected to the discharge lamp = terminal base al via the wiring ca2. That is, since it is not necessary to perform two wirings from the lighting device to the discharge lamp 6 and the discharge lamp 6a with different wires, the number of wirings from the lighting device to the discharge lamp and the number of output connectors of the lighting device can be reduced. In addition, FIG. 17 illustrates the case where there are two discharge lamp load circuits, but the case where there are three discharge lamp load circuits. The output lines from the lighting device can also be common cal, which can reduce the self-lighting device. The number of wiring to the discharge lamp and the number of output connectors of the lighting device. Effects of the Invention The present invention has the following effects because it is structured as described above. The discharge lamp lighting device of the present invention includes a direct current power supply; the inverter circuit is formed by converting a direct current supplied from the direct current power supply into a high-frequency current; a half-bridge circuit having a pair of switching elements; a discharge lamp load circuit It consists of a current-resistant coil, at least one discharge lamp using high-frequency current lighting from the inverter circuit, a series circuit in which the coupling capacitors are connected in series, and a capacitor connected in parallel with the thorium discharge lamp; a connection device is provided on the load Circuit

2148-4934-PF (N) .ptd Page 25 566058 V. Description of the invention (23) " y change the type and number of connections of the discharge lamp and connect it, secondary winding, set in the load circuit of the 乂 discharge lamp The anti-current coil outputs a voltage driving the pair of switching elements, and an fV conversion circuit converts the output voltage of the secondary winding into a DC voltage corresponding to its oscillation frequency; and a control device converts according to the f-V The output of the circuit controls the current of the discharge lamp; when the connection device is used to connect the discharge lamp whose rated current is approximately equal but the rated voltage and rated discharge lamp power are different, regardless of the number of connections of the discharge lamp, The rated output power corresponds to the output power lighting; not only a single lighting device can be used to replace a variety of (type) discharge lamps with approximately the same rated current but different rated voltages; It can be turned on regardless of 2 lights or 1 light. Furthermore, a f-V conversion circuit can be obtained with a simple structure, which can be made cheap and compact. In addition, the f-V conversion circuit 100 can be made safer for the failure mode. Also, since a dedicated iCT for driving the switching element is not required, it can be made cheap and miniaturized.

Because it includes a DC power supply; the inverter circuit is composed of a half-bridge circuit with a pair of switching elements that converts the DC power supplied from the DC power supply to high-frequency current; a plurality of parallel discharge lamp load circuits are made of anti-current The coil, the discharge lamp using the high-frequency current lighting from the inverter circuit, the series circuit in which the coupling capacitors are connected in series, and the capacitor connected in parallel with the discharge lamp constitute a 'connection device. It is provided in the load circuit and the discharge lamp can be changed. The type and number of connections are connected; secondary windings, each of which is located in the current-relief coil of the discharge lamp load circuit, outputs the voltage driving the pair of switching elements; f a V

2148-4934 * PF (N) .ptd Page 26 566058 V. Description of the invention (24) '—— The conversion circuit converts the output voltage of the secondary winding into a DC voltage corresponding to its oscillation frequency; and a control device To control the current of the discharge lamp in accordance with the output of the f-V conversion circuit; when using the connection device to connect the discharge lamp with a substantially equal rated current but different rated voltage and rated discharge lamp power, 'connect the discharge lamp load circuits and connect The sum of the rated voltages of the discharge lamps which becomes the respective load circuit of the discharge lamp becomes approximately equal, regardless of the number of connections of the discharge lamp, so that the output power is lighted with the output power corresponding to the respective rated output power of the discharge lamp; One of the discharge lamp load circuits can also keep the discharge lamp current of the remaining discharge lamp load circuits unchanged. In order to save power, only one discharge lamp load circuit of the plurality of discharge lamp load circuits is left, and the discharge lamp current of the remaining discharge lamp load circuits can be turned on to be substantially equal to the current of all the lamps. . Because it includes a DC power supply; the inverter circuit is composed of a half-bridge circuit with a pair of switching elements that converts the DC power supplied from the DC power supply to high-frequency current; a plurality of parallel discharge lamp load circuits are made of anti-current A coil, a discharge lamp using high-frequency electric lighting from the inverter circuit, a series circuit in which a coupling capacitor is connected in series, and a capacitor connected in parallel with the discharge lamp; a connection device is provided in the negative cutting circuit, and the The type and connection number of the discharge lamp are followed by one winding, each of which is provided in the anti-coil of the discharge lamp load circuit to output the voltage driving the pair of switching elements; the f-V conversion circuit is' from the secondary winding The wheel output voltage is converted into a DC voltage corresponding to its oscillation frequency; and the control device controls the current of the discharge lamp according to the output of the f-V conversion circuit; the rated current is connected by using the connection device

2l48-4934-PF (N) .ptd Page 27 566058 Description of the invention (25) When the discharge lamps are substantially equal but the rated voltage and the rated discharge lamp power are different, each discharge lamp load circuit has its own discharge lamp. The group of the discharge lamp of the load circuit is the same, regardless of the number of connections of the discharge lamp, so that the output power corresponding to the rated output power of the discharge lamp is lit; unplug one of a plurality of discharge lamp load circuits to discharge The lamp load circuit can also keep the discharge lamp current of the remaining discharge lamp load circuit unchanged. In order to save power, only one discharge lamp load circuit of the plurality of discharge lamp load circuits is left, and the discharge lamp current of the remaining discharge lamp load circuits can be turned on to be substantially equal to the current of all the lamps. . Also, because of the connection system of the discharge lamp using the load circuit of the connection device, a plurality of lamps with a low rated voltage are connected in series, and at least one rated voltage: the discharge lamp can be used to generate electricity at the rated output of the discharge lamp. Light up. j ^ Due to the connection device, the connection can be selected. When the discharge lamp load circuit j has a plurality of discharge lamps, it is connected to increase the voltage of each filament of the anti-lamp of the discharge lamp load circuit, and the voltage; : Lamp: Heating, ... Early filament disconnection caused by cold start of the filament, early blackening of the discharge lamp wall, Kamamoto A ^ 詈, ^ ^ ^ ^ When asked, the borrower should choose the appropriate connection to install the device The connection of a lamp can suppress the unhelpfulness caused by secondary winding. Because the output frequency characteristics of the resonance frequency of the discharge lamp load electric lamp load circuit also become approximately equal, when the circuit is plural, the plural It is approximately equal, and the f-ν conversion circuit can make a plurality of discharge lamps negative when installed.

2148-4934-PF (N) .ptd

566058 V. Description of the invention (26) The difference in characteristics between the discharge lamps with different load circuits becomes smaller. Also, because the voltage when the switching elements of the drive circuit of the inverter are normally lit is determined to be approximately equal, the solid-road winding characteristics are also approximately equal, which can make it possible to install different discharge lamps between multiple discharge two-load circuits. In this case, the difference in characteristics becomes small. , Reduce "= the number of capacitors between the capacitors. The number of wiring in the discharge lamp and the wheel-out connection of the lighting device =, because it includes the diode, the anode and the terminal connected to the coupling capacitor 'cathode and the DC power supply The positive connection is wide::, the anode connection of the DC power supply of the anode 11 is not connected to the negative connection of the terminal connection port; the end of the life of the discharge lamp is suppressed: = operation: the rated current is approximately the same and the types are different: electric lamp electric = condition It can also be controlled to correspond to the rated current of the installed discharge lamp. Because the fV conversion circuit is provided with a pressure reducing device that reduces the voltage of the f_v conversion circuit by only a predetermined value, it is variable: the coefficient becomes larger. Distinguishable electricity of different types of discharge lamps: excellent? Also, because of the characteristics of the V conversion circuit, the vibration of the inverter circuit is obtained. 2: f The lower the output voltage, the greater the 'can only make the current of the discharge lamp suppressed.' The 3mf-v conversion principle ... The characteristic phase & special, the electric current of the electric bulb is increased to make it suitable for the discharge phase of the output power.

2148-4934-PF (N) .ptd Page 29 566058 V. Description of the invention (27) The f-V conversion circuit 100 can be made safer for the failure mode. 2148-4934-PF (N) .ptd Page 30 11.566058 Brief Description of Drawings Figure 1 is a circuit diagram showing a discharge lamp lighting device according to the first embodiment of the present invention (when a discharge lamp type A is installed). Fig. 2 is a circuit waveform diagram illustrating the operation of the discharge lamp lighting device according to the first embodiment of the present invention. Fig. 3 is a circuit diagram showing a discharge lamp lighting device according to the first embodiment of the present invention (when a discharge lamp type B is attached). Fig. 4 is a diagram for explaining the operation of the discharge lamp lighting device according to the first embodiment of the present invention and the operation of a conventional embodiment. Fig. 5 is a circuit diagram showing a discharge lamp lighting device according to the first embodiment of the present invention (when a discharge lamp type C is attached). Fig. 6 is a circuit diagram showing a discharge lamp lighting device according to a second embodiment of the present invention (when a discharge lamp type A is attached). Fig. 7 is a circuit diagram showing a discharge lamp lighting device according to a second embodiment of the present invention (when a discharge lamp type B is attached). Fig. 8 is a circuit diagram showing a discharge lamp lighting device according to a second embodiment of the present invention (when a discharge lamp type C is attached). Fig. 9 is a circuit diagram showing a discharge lamp lighting device according to a third embodiment of the present invention (when a discharge lamp type A is attached). Fig. 10 is a circuit diagram showing a discharge lamp lighting device according to a third embodiment of the present invention (when a discharge lamp type C is attached). Fig. 11 is a circuit diagram showing a discharge lamp lighting device according to a fourth embodiment of the present invention (when a discharge lamp type A is mounted). Fig. 12 is a circuit diagram showing a discharge lamp lighting device according to a fourth embodiment of the present invention (when a discharge lamp type C is attached).

2148-4934-PF (N) .ptd p. 31 566058

Brief description of the drawings: Electricity of a lamp lighting device Fig. 13 shows a discharge of the fifth embodiment of the present invention. Fig. 14 is a circuit waveform diagram illustrating the operation of the discharge lamp lighting device of the fifth embodiment of the present invention. Zhuang Rongxi Lei Fig. 15 is a circuit diagram showing the discharge lamp lighting circuit according to the embodiment Θ of the present invention. > Le Fig. 16 is a circuit waveform diagram illustrating the operation of a discharge lamp lighting device according to a sixth embodiment of the present invention. Fig. 17 is a circuit diagram showing a discharge lamp lighting device according to a seventh embodiment of the present invention. Fig. 18 is a circuit diagram of a conventional discharge lamp point i device. Fig. 19 is a power circuit diagram of a conventional discharge lamp lighting device. Explanation of symbols 1 ~ power supply; 2, 3 ~ switching element (SW element); 5, 5a ~ current-resistant coil; 6, 10, 6a, 10a ~ discharge lamp; 7, 7a ~ capacitor; 8, 8a ~ capacitor; 1 3 1,14,1,6,17 ~ resistance; 15,15a ~ capacitor; L100, L110 ~ discharge lamp load circuit; 20,21,20a, 21a ~ diode; 8 0 '8 Buzena diode;

2148-4934-PF (N) ptd Page 32 566058 Brief description of the diagram 100f-V ~ conversion circuit; 1 0 1 ~ control circuit; a ~ h ~ terminal block. Page 33 2148-4934-PF (N) .ptd II ·!

Claims (1)

566058 6. Scope of patent application 1 · A discharge lamp lighting device, including: a DC power supply; an inverter circuit composed of a half-bridge circuit with a pair of switching elements that converts DC supplied from the DC power supply into high-frequency current The discharge lamp load circuit is composed of a current-resistant coil, a discharge lamp using at least one of the high-frequency current lights from the inverter circuit, a series circuit in which a coupling capacitor is connected in series, and a capacitor connected in parallel with the discharge lamp; a connecting device , Set in the load circuit, can change the type and connection number of the discharge lamp and connect; secondary winding, set in the discharge, the current-resistant coil of the load circuit, the output drives the pair of switching elements; fV A conversion circuit that converts the output voltage of the secondary winding into a DC voltage corresponding to its oscillation frequency; and a control device that controls the current of the discharge lamp according to the fV conversion circuit 4 and is characterized by: using the connection device When connecting the discharge lamp whose rated current is approximately the same as that of the rated discharge lamp, the voltage, t, and Respective rated output; relay lighting. The output power corresponding to the electric knife 2 · ——A kind of discharge lamp lighting device, including DC power supply; · Inverter circuit, a type of switching device with a pair of ancient frequency currents of this acre, ancient frequency current; 2148-4934-PF (N) .ptd Page 34 566058 6. The scope of the patent application is a plurality of discharge lamp load circuits connected in parallel, including a current-resistant coil, a discharge lamp using high-frequency current lighting from the inverter circuit, and coupling. A series circuit of capacitors connected in series and a capacitor connected in parallel with the discharge lamp; a connection device provided in the load circuit, which can be connected after changing the type and number of connections of the discharge lamp; secondary windings, each provided in the discharge lamp The anti-current coil of the load circuit outputs the voltage driving the pair of switching elements; f-V conversion circuit converts the output voltage of the secondary winding into a DC voltage corresponding to its oscillation frequency; and a control device according to the The output of the f_v conversion circuit controls the current of the discharge lamp; It is characterized by: when using the connection device to connect the discharge lamps with substantially equal rated currents but different rated voltages and different rated discharge lamp powers, connect the discharge lamp load circuits The sum of the rated voltages of the discharge lamps that become the respective discharge lamp load circuits becomes approximately equal, regardless of the number of connections of the discharge lamp Such that the discharge lamp and to each of the rated output power of the output power corresponding to the lighting. 3. A kind of discharge lamp lighting device, including: a DC power supply; an inverter circuit composed of a half-bridge circuit with a pair of switching elements that converts DC supplied from the DC power supply into frequency current; conversion "a plurality of parallel The discharge lamp load circuit is composed of a current-resistant coil, a discharge lamp using high-frequency current lighting from the inverter circuit, a series circuit in which a coupling capacitor is connected in series, and a capacitor connected in parallel with the discharge lamp; ° 2148-4934-PF (N) .ptd 566058 6. The scope of the patent application and the connection are provided in the load circuit, the type circle of the discharge lamp can be changed, and the anti-streamline of the load circuit of the discharge lamp is set to drive the The voltage of a pair of switching elements; an fV conversion circuit that converts the DC voltage corresponding to the secondary winding oscillation frequency; and the output electric current of 4 is converted to the same electricity; a device that controls the discharge lamp according to the output of the fv conversion circuit It is characterized in that: the rated device is connected with the rated current being approximately equal to the rated voltage, ^: when the discharge lamps are different, the discharge lamp load circuit is the same as the discharge lamp load circuit when the discharge lamps are loaded, Φ ^^ and The number of connections is such that the output power is turned on corresponding to the rated output power of the discharge lamp. 4. If the discharge lamp lighting item No. 丨, 2 or 3 of the patent scope of Shenying Pei is set, the eighth 'the connection system of the discharge lamp using the load circuit of the connecting device is connected to a plurality of discharge lamps with a low rated voltage in series' at least Connect a discharge lamp with a high rated voltage. 5. If the discharge lamp lighting device according to the scope of patent application No. 丨, 2 or 3, wherein the connection device enables optional connection, when the discharge lamp load circuit is connected in series with a plurality of discharge lamps, they are connected so as to hold the discharge lamp load. The voltage generated by the secondary winding set by the current-resistant coil of the circuit heats the respective filaments of each of the discharge lamps connected in series, and when only one discharge lamp is connected, it is connected so as not to heat the filament. 566058 6. Scope of patent application ------ 6 · If the application is for the discharge lamp lighting device of item 1, 2 or 3 of the patent scope, = Medium, when the discharge lamp load circuit is plural, discharge the plural ones The resonance frequency of the lamp load circuit is determined to be approximately equal. 7 · If the discharge lamp lighting device of item 1, 2, or 3 of the patent scope is declared, the eighth, the voltage of a plurality of secondary windings driving the switching element of the inverter circuit during normal lighting is determined to be approximately equal . 8. The discharge lamp lighting device according to the scope of patent application No. 丨, 2 or 3, wherein a current-proof coil is connected between the discharge lamp and the surface-mounted capacitor. 9. The discharge lamp lighting device according to the scope of patent application No. 丨, 2 or 3, which includes: a pole body, an anode connected to a terminal that is not connected to the DC power supply of the coupling capacitor, and a cathode connected to the positive electrode of the DC power supply And, the diode, the cathode is connected to a terminal that is not connected to the DC power source of the coupling capacitor, and the anode is connected to the negative electrode of the DC power source. 10. The discharge lamp lighting device according to the scope of patent application No. 丨, 2 or 3, wherein the fv conversion circuit is provided with a pressure reducing device that reduces the output voltage of the bv conversion circuit by only a predetermined value. 11 · If the discharge lamp lighting device of item 1, 2, or 3 of the scope of patent application, where 'makes the characteristics of the f-V conversion circuit obtain the oscillation frequency of the inverter circuit, the lower the output voltage, the greater. 2148-4934-PF (N) .ptd Page 37