TWI290010B - Discharge lamp lighting device - Google Patents

Abstract

To provide a discharge lamp lighting device which reliably detects an abnormal state of a discharge lamp such as the end of its service life or non-lighting, irrespective of the type of the discharge lamp, and stops the oscillating operation of an inverter circuit. The discharge lamp lighting device comprises discharge lamp load circuits L100, L110 for lighting the discharge lamps 7, 11 with a high frequency current fed from the inverter circuit that converts a direct current from a direct current power supply 1 into the high frequency current. A coupling capacitor 5 connected to an output of the inverter circuit and a series circuit made up of choke coils 6, 10 are connected in this order to a cathode of the direct current power supply 1 via the discharge lamps 7, 11. The discharge lamp lighting device further comprises: a ± voltage detecting circuit D100 for detecting a voltage between the cathode of the direct current power supply 1 and a node between the coupling capacitor 5 and the choke coils 6, 10 through averaging the same; and a holding circuit H100 for stopping the oscillation of the inverter circuit and maintaining the stopped state when the voltage detected by the detecting circuit D100 falls outside a predetermined range of positive/negative voltage.

Description

1290010 V. INSTRUCTIONS (1) [Technical field to which the invention pertains: t or the present invention relates to a protection circuit using a lighting device for lighting an electric light from an inverter, and the current discharge current is substantially equal to the rated voltage. There are many different kinds of protection circuits for the discharge lamp lighting device that can set the rated protection circuit. The lamp has the protection of the prior art. [Prior Art] The structure of the high-voltage side wire of the discharge lamp of the conventional discharge and load circuit, the tube voltage of the discharge lamp has no light-emitting component on one side; and the output of the component detection unit Reduce or stop the literature 1). [Patent Document 10 040, Fig. 13] Lamp lighting installation discharge lamp point and circuit connection detection package; asymmetric half-end seeding circuit, the logic signal, the low between the lamp device and the ground After the component is detected, the power is controlled, and the control includes a variable frequency lightning packet; the te* circuit, the capacitor 2 = the tube voltage detection unit, and the voltage across the filament of the low voltage side of the second and second enemy lamps The 'Bei circuit, the side of the detector is in the discharge lamp, the output of the voltage and current of each part and the output of the non-symmetric detection part are used to make the circuit of the inverter circuit turn out (for example, refer to Patent Special Publication No. 2002-83698 Bulletin (Paragraph —12 - <1 [Invention] The invention solves the problem of the i-question Patent Document 1 requires a filament voltage detecting device, detects the filament voltage, and the first detecting device detects the discharge lamp Tube voltage tube

1290010

It is set to = output 50%, when the value of the normal value of the discharge lamp is exceeded, and it is considered that the predetermined value of the value of the end of life is compared and judged. To the phase ίί瓦ΐί:::,—the discharge lamp lighting device will have a large rated current ί=; before the conditions are raised, as in the paragraph 9 of the record i; Conditional issues. In the period of time, the value of the normal detection time of the detection device 1 and the end of the life of the factory are two different conditions. It is necessary to determine in advance the variation of the discharge lamp to be applied or the change of the manufacturer: The problem of large loads.

2. Solving the problem of the prior device as described above, the first method of the present invention is for a discharge lamp lighting device, which can discharge a plurality of discharge lamp lamps having different rated currents and voltages. The lamp light is installed with @, and there is a protection circuit. Regardless of the type of the discharge lamp, the abnormal oscillation state of the discharge dance or the non-lighting is detected, and the oscillation operation of the inverter circuit can be stopped. A second object of the present invention is to provide a discharge lamp lighting device capable of lighting a plurality of discharge lamps having substantially equal rated currents and different rated voltages, and the lamp lighting device is substantially for the value of the rated current system. equal,

The series of discharge lamps with different rated voltages can also be used without changing the circuit constants of the protection circuit. A third object of the present invention is to provide a discharge lamp lighting device in which a discharge lamp lighting device capable of lighting a plurality of discharge lamps having substantially equal rated currents and different rated voltages is provided with at least one discharge lamp The situation 'does not start the oscillation of the inverter circuit, and also removes after the oscillation starts.

1290010 V. INSTRUCTIONS (3) -^ The situation of the discharge lamp installed in the lower part of the king stops the inverter circuit. A fourth object of the present invention is to provide a discharge lamp point = sway. The three rated currents are approximately equal and the rated voltages are different. In the display of the wood, the lighting device, at the end of the life of the detection of the discharge lamp, the lamp is stopped. If the discharge lamp is replaced by a normal discharge lamp after lighting, etc., it is not right. If the power is removed, the inverter circuit can be restarted. · The foot-mounted cutting wheel solves the problem. The discharge of the present invention The lamp lighting device comprises: a straight 1 circuit, which converts the direct current from the direct current power supply to a direct current, and the inverter = a lamp load circuit, which utilizes the frequency conversion and the electric light; and is characterized by including positive and negative voltage detection power ^ The coupled electric, green &gt; of the output connection of the frequency divider circuit, and the voltage are averaged in this order via the discharge lamp and the series circuit capacitor of the straight two-two-turn coil and the anti-current coil Detecting; and maintaining the circuit, when the positive; second 乂 = detection voltage exceeds the predetermined positive and negative power 八 eight detection circuit 匕, θ electric seat of the circumference of the # eclipse Let the stop state continue. σ <First Embodiment> Fig. 1 is a circuit diagram showing a structure of a discharge lamp lighting device of an embodiment i of the present invention, and Fig. 2 is an operation explanatory view of the discharge lamp lighting device.

1290010 V. DESCRIPTION OF THE INVENTION (4) In Fig. 1, the DC power supply 1 is obtained by, for example, rectifying a commercial power supply and then smoothing the capacitor. The inverter circuit is composed of switching elements composed of MOSFETs 2 and 3. The discharge lamp load circuit L1 00 is composed of a choke coil 6, a discharge lamp 7, and a capacitor 8 connected in parallel with the discharge k7, one end of which is connected via a coupling capacitor 5 and a connection point of the switching elements 2 and 3, and the other end and the DC power supply.丨 连接 connection. Further, 'there is an inverse method built between the drain and the source of the switching elements 2 and 3, and the polar body is omitted. The discharge lamp load circuit L110 has the same structure as the discharge lamp load circuit L1, and is connected in parallel with the discharge lamp load circuit L1 00, and is composed of a choke coil 1A, a discharge lamp 11, and a capacitor 丨2 connected in parallel with the discharge lamp 11. The oscillation control circuit 4 causes the switching element 3 to make the switching element 2 interact with each other in accordance with the voltage between the negative electrode of the DC power source i and the output terminal D2, in accordance with the voltage between the Vs terminal and the output terminal D1. Stop. In addition, the s terminal becomes a low voltage level (hereinafter referred to as a low level) and oscillates.

The Vcc symbol indicates a control driving voltage supplied from a circuit portion (not shown). The positive and negative voltage ^ then the circuit's ± price measurement circuit D1 〇〇 system discharge lamp load circuit L100, L110 the average value of the voltage across the system is in the normal discharge of the discharge lamp detection circuit about 〇v voltage, I end of life A circuit that detects positive or negative voltages. One end of the resistor 2 i and the coupling point of the coupling &amp; capacitor 5 and the choke coil 6 are connected. The other end is connected via a resistor 22 and a cathode of the DC power source i. Connect 22 parallel capacitor 23.

2148-6268-PF(N2); Ahddub.ptd 1290010

V. Invention Description (5) The circuit CV1°0 is used to detect electric coffee in the soil. The result is that the negative 仏唬 exceeds the predetermined range (in the negative :: brother), the output of the positive high level is output, and the conversion circuit of the low level signal is located in the range. (4) If the output of the resistor 39 is one end and the control circuit driving voltage VccC is ητ P \ , and the other end is connected to the collector of the transistor 4〇. With the anode of the == body 42 and the DC power source, the capacitor 43 is connected in parallel with the anode of the power source 1 and the base of the NPN transistor 4〇. Zener - then the base of the electro-crystal dragon is connected, the anode and the cathode of the two m are connected. :=:ΐ:Γ and the connection point of the resistors 21 and 22 are connected. The % pole of the one-pole body 38 is well connected to the νρν transistor 33 of the holding circuit Η1 后 which will be described later. The cathode and the Zener of the signal conversion circuit CV1 00 are selected. The pressure is such that the following formula (1) is satisfied. "Inner-pole" Zener-V23&lt;Vsl=0-(Vz44+VF45) (1) However, the sign in 'Formula (1) is as follows. &lt;1

Vz44: Zener voltage V14 of Zener diode 44: forward voltage drop of diode 45 (about 〇·6ν) -V23: coupling of DC power supply due to discharge lamp 7, u: discharge material of wire For reasons such as consumption, the voltage discharge Jk is detected at the end of the capacitor 23 - side. In addition, V s 1 is selected to be much less than zero.

1290010

V. INSTRUCTIONS (6) In the case where the detection signal V 2 3 is approximately 0, the electric sputum employs a low level. The episode of the Japanese body 40 becomes the detection signal - V 2 3 satisfies the above equation (1), and the F pole becomes the high level. The price of the transistor 40 is kept in the circuit Η1 〇〇 is the ± detection circuit d; [〇〇准之鸪兄,丨企丨丨—田# ^ U ϋ detected signal minus the sheep Don't judge, in the case of an abnormality, stop the circuit that continues to maintain its state. After the circuit Η100, the collector of the germanium transistor 33 is connected to the base of ρΝρ, and the collector of the germanium transistor 34 is connected to the anode of the transistor Μ. The emitter of the germanium transistor 33 is connected to the negative electrode of the direct current power source, and the base is connected to the anode of the Zener diode 36. The cathode of the diode 37 is connected to the cathode of the Zener diode 36, and the anode is connected to the junction of the resistors 21, 22. A resistor 35 is connected between the base and the emitter of the NpN transistor 33. A resistor 30 is connected between the base and the emitter of the pNp transistor 34. The emitter from the PNP transistor 34 is connected via a resistor 30 and Vcc. The cathode of the diode 31 and the emitter of the pNp transistor 34 are connected to the anode and the oscillation stop terminal 3 of the oscillation control circuit 4. The Zener voltage of the Zener diode 36 is selected in the holding circuit Η1 0 0 so that the following formula (2) is satisfied. '0&lt;Vs2=VBE33+Vz36+VF37&lt;+V23 (2) &lt;1 The symbol in the formula (2) is as follows.

Vz36: Zener voltage of Zener diode 36 VF37: Forward voltage drop of diode 37 (about 〇·6ν) + V23 : discharge of filament on the negative side of DC lamp 1 of discharge lamp Material consumption, etc. at the end of the life of the discharge lamp in capacitor 2 3

1290010 V. Invention description (7) Detection voltage In addition, + Vs2 is selected to be much larger than zero. In the case where the detection signal + V 2 3 is about 0, the emitter of the p N P transistor 34 becomes a high level. In the case where the detection signal 023 satisfies the above formula (2), it is judged that the transistor 33 is turned on, and its collector current flows in the path of the emitter and the base of Vcc, the resistor 30, and the PNP transistor 34. That is, the PNP transistor 34 becomes conductive due to the current flowing to its base.

When the PNP transistor 34 is turned on, the collector current flows into the base of the NPN transistor 33 via the path of Vcc and the resistor 30, and the NPN transistor 33 continues to be turned on regardless of the value of +V23. Since the NPN transistor 33 and the PNP transistor 34 become conductive at the same time, the emitter of the PNP transistor 34 becomes a low level. ^ Also, in the case where the detection signal V2 3 satisfies the equation (1), the emitter of the PNP transistor 34 becomes a low level and continues to maintain its state. Further, Fig. 3 shows an example of the configuration of the DC power supply 1 in the case where a DC power source is obtained from a commercial power source.

° AC power supply that is constructed from the commercial power supply 1 a. After full-wave rectification by the diode bridge lb, it is contiguous with the smoothing capacitor and output as a DC power supply to the load circuit. /, the duo team Illustrator and 2 illustrate the action of the embodiment of the present invention. In addition, in Fig. 2 and the corresponding embodiment of the system) ~ (the voltage waveform shown. d is in Figure 2, as time t elapses, and the state of the discharge lamp 7, 1 1

1290010

(a) shows the voltage waveform of the capacitor 23, (b) shows the collector electric waveform of the NPN transistor 4〇, and (c) shows the s terminal voltage waveform of the oscillation control circuit 4 (PNP transistor 3 4 Emitter voltage waveform). Mode 1 indicates a case where the discharge lamps 7, 11 are normal; mode 2 indicates a state in the end of life in the case where the discharge material of the filament on the side of the choke coil 6 of the discharge lamp 7 is consumed, and the discharge lamp 11 is normal; mode 3 indicates that the discharge is in the discharge state. The state of the end of life in the case where the discharge material of the filament on the negative electrode side of the direct current power source 1 of the lamp 7 is consumed, and the discharge lamp 11 is normal. In Fig. 1, when the DC power supply 1 is supplied, the switching elements 2 and 3 are alternately driven by the oscillation control circuit 4 at a high frequency so that the discharge lamp is turned on. Here, first, the case where the discharge lamps 7 and 1 1 are in the normal mode mode 1 will be described. The period of operation of mode 1 is the period of time 11 to 12 of FIG. If the capacitance value of the electrostatic capacitance of the coupling capacitor 5 is selected so that the voltage drop caused by the current flowing to the discharge lamp lighting circuit becomes sufficiently small, the voltage value of the coupling capacitor becomes 1/2 of the voltage of the DC power supply 1. Therefore, the potentials of the connection point a of the resistor 21 and the coupling capacitor are expressed by the equations (3) and (4). In the case where the switching element 2 is turned on and 3 is not turned on,

Va2~l=Vl - Vc5-1-Vl - Vl/2=Vl/2 (3) However, the symbol of the formula (3) is as follows.

Va2-1 : Voltage at point a when switching element 2 is turned on VI : Voltage of DC power supply 1

Vc5-1: voltage across the coupling capacitor 5 (connection of switching elements 2, 3

1290010 V. INSTRUCTIONS (9) The contact side is positive) When the switching element 2 is not dedicated and 3 is turned on, = 3-1 ~ Vc5-1: ~ Π / 2 (4) If the switching elements 2, 3 Guide „ 士 笙 τ τ is shown in the following formula (5). During the conduction period, the average voltage of point a

Vaave-l=(3)+(4)=〇 (5)

The average voltage of Vaave-1 ·· a point + ^ 7) is shown in the mode 1 state, the average voltage is 0. In the case of the Ray tf circuit D100, the voltage of 9 points is divided by the resistors 21 and 22: f 23 integral 'If the circuit constant is set appropriately, the 电容器 of the capacitor 23 becomes approximately 〇. : 2 In mode 1, the output of the soil detection circuit D1 is approximately Q. Pull type 1, because the NPN electrode of the signal conversion circuit CV1 turns into a low level, and the * pole of the brain crystal 33 is also low level, the oscillation stop terminal 3 of the vibration circuit 4 becomes a high level, and the oscillation control circuit 4 oscillates. The action continues and the discharge lamps 7 and 11 continue to discharge normally. It is known from the above description that, in the operation state of mode 1, regardless of the type of the discharge lamp, as long as the discharge lamp is normally discharged, a voltage of about 0 is obtained in the capacitor 23, and after the normal discharge state is recognized, the oscillation of the inverter circuit can be continued. . Next, in Fig. 2, the operation of the mode 2 in which the discharge material of the filament on the choke coil 6 side of the discharge lamp 7 is in a consumed state and the discharge lamp 11 is normal will be described. The operation description of mode 2 is during the period from time t2 to t3 of Fig. 2,

1290010 V. INSTRUCTIONS (10) The anti-flow line of the discharge lamp 7 is stored at the time t21 during the period. In the mode 2, in the discharge lamp load circuit l 1 , the current in the half cycle of the positive phase becomes larger, and the current in the switching element 3 = the conduction period of the element 2 becomes smaller. Negative half cycle of ^ When the current of the discharge lamp load circuit L11 is equal, the current of the coupling capacitor 5 is large in the positive half cycle and the positive half cycle of the half cycle. Due to the imbalance of the current, the coupling current increases in the negative half cycle V1/2. Voltage ratio of the power supply ^ In the mode 2, the potential of a is expressed by the equations (6) and (7). In the case where the switching element 2 is turned on and 3 is not turned on,

Va2 - 2 = V1 - Vc5 - 2 = V1 _(vl/2 + (6 ) v 1 / ^ - α 1 However, the sign of the equation (6) is as follows.

Va2-2: Turn on the switching element 2 VI: DC power supply! Voltage of electricity M U

Vc5-2: voltage across the capacitor 5: αΐ : due to the increase in the voltage flowing through the coupling capacitor 5, the switching element 2 is not conducting, and 3 is conducting.

Va3 - 2 = -Vc5 - 2 = - (V1/2 + αΐ) (7) If the switching periods of the switching elements 2 and 3 are equal to the following equation (8). a ^ thousand average voltage change

1290010 V. Description of invention (11)

Vaave-2 : Average voltage at point a As shown in equation (8), the average voltage at the state &amp; point of mode 2 becomes a negative voltage. A negative voltage is obtained in the capacitor 2 3 of the earth debt measuring circuit D1. That is, the output of the mode 2's detection circuit d 1 〇 系 is a negative voltage. Here, if the voltage of the Zener diode 44 of the signal conversion circuit CV1 is selected so that the equation (1) is satisfied, the collector of the transistor 4 turns into a high level, and the NPN transistor 33 becomes conductive. Then, the pnp transistor 34 is also turned on, the oscillation stop terminal 3 of the oscillation control circuit 4 becomes a low level, and the oscillation operation is stopped. When the oscillation operation of the oscillation control circuit 4 is stopped, the oscillation operation of the inverter circuit is also stopped (time t22), the discharge lamp 7 and the quenching lamp. Further, as described above, this state continues until the power supply 2 is turned off and the supply of Vcc is stopped. In the above description, the discharge material of the filament on the choke coil 6 side of the discharge lamp 7 is consumed and the discharge lamp is normal, but the discharge lamp 7 is positively belted and the discharge lamp 11 is on the side of the anti-flow coil. The case where the discharge material of the filament is consumed, or the discharge of the discharge material of the filament on the side of the choke coil of a certain discharge lamp can also be obtained by satisfying the negative electric charge of the above formula (1), which is apparent

夕广: The second time of the death of the singer's syllabus in the mode 2, the discharge of the discharge material of the filament on the side of the discharge line j, and the like, and the discharge lamp, etc., the capacitor 23 is satisfied with the above formula ( 1) The negative power ' ^ keeps the circuit H1 00 output low level 'make the inverter stop' discharge lamp to avoid running in the abnormal state

2148-6268-PF(N2); Ahddub.ptd Page 16 1290010 V. INSTRUCTION STATEMENT (12) The operation of the human being is shown in Fig. 2 for the negative 3 of the DC power supply 1 of the discharge 7. The state of consumption is consumed, and the discharge material during the operation period of the mode mode 2 of the discharge lamp U is normal, and the discharge material of the time 13 1 is consumed during the period of time 13 to 14 of FIG. 2, assuming that the DC power source 1 of the discharge lamp 7 is The filament writing circuit π i Γ _ t31 to 132 on the negative electrode side (t32 is the frequency conversion as shown later; the time is short), since the discharge lamp load circuit L100 is in the positive and negative half cycles, the current imbalance is in the capacitor 23 The positive voltage is obtained at the voltage, and the Zener diode of the Zener diode 36 of the circuit hi 00 is satisfied, so that the NPN transistor 33 becomes conductive, and the PNP transistor 34 becomes conductive. , step soup batch also 丨 φ ^ receiver s becomes low level, the oscillation stops the control circuit 4 oscillation stop terminal. If the oscillation operation of the oscillation control circuit 4 stops, the oscillation operation of the inverter circuit also stops (time t32) 'discharge lamp 7 and 1 turn off the lights. Further, as described above, this state continues until the power supply is turned off, and the supply of Vcc is stopped. In the above description, the discharge lamp 7 is straight; the discharge material of the filament on the negative side of the power source is consumed, and the discharge lamp is normal, but the discharge lamp 7 is normal and the discharge lamp U is a DC power source. ! In the case where the discharge material of the filament on the negative electrode side is consumed, or the discharge material of the filament on the negative electrode side of the direct current of the discharge lamp is consumed, the NPN transistor 33 of the holding circuit H1 00 can be turned on in the capacitor 23. It is obvious that the pNp transistor 34 is also turned on to satisfy the positive voltage of the above formula (2). From the above description, it is known that in the operation state of the plate type 3, the tantalum capacitor 23 is satisfied regardless of the type of the discharge material of the filament on the side of the anti-flow coil of the lamp (12). And the pressure of the discharge lamp, self-holding circuit HH. The output low level enables m to be positive and the discharge lamp to avoid operating in an abnormal state. As shown in the above description, if the type of the lamp of the discharge material of the filament on the choke coil side of the discharge lamp according to the present invention is irrelevant, it is obtained in the capacitor 23; the voltage of the electric type (7) The inverter circuit can continue only in all of the ^1·1^ or oscillation action. The situation of electricity and positive tenth is that, when using the same lighting device, the discharge voltage of a plurality of discharge lamps with different constant voltage (rated power) can be made, and the life of the detection circuit irrespective of the type of the discharge lamp can make the inverter The action of the circuit is safely stopped. After ten sorrows, it is not necessary to select the circuit constants of the various types of discharge signals CV100 and the holding circuit Η100 for the various types of discharge lamps, and it is possible to reduce the types of parts used for the raw and electric lamp devices or the inventory management models. Further, in the above description, the case where the discharge lamp is two lamps has been described, but it is obvious that the discharge lamp is one lamp or three lamps or more. Further, the soil detecting circuit D 1 〇〇, the signal converting circuit CV1 〇〇, and the holding circuit H1 00 are not limited to the above-described configuration, and may have a structure having the same function. $ 'For the discharge lamp load circuit Li 〇〇 and Lii 〇 set up the soil debt measurement circuit D1 0 0 ' but know the settings corresponding to each discharge lamp load circuit 1290010 —-, five, invention description (14) Multiple face capacitors and ± Λ ^, / then the circuit 'connected to the wheel or the line (WIRED 0R) via the diode, the output of the signal conversion circuit CV1 00 and the hold circuit H100 output also may. % &amp; In addition, in this implementation you | 1 1 ^ _ 1 彳 Although not shown, one of the resistors and the DC power supply I and the DC power supply + l ^ and the positive pole of the electromechanical, the other end and fit The junction of the capacitor 5| 5 and the choke coil 6 is connected by 4 σ π η, and the filament on the negative side of the DC power source I of the mounted discharge lamp is normal, and the filament of the electromechanical φ Λ choke coil is completely disconnected. , the current flows from the DC power source I to the L ^ ^ ^ ^ ^ &lt; the positive electrode flows through the resistor 5 7 to the capacitor 2 3,

Because the voltage rises, the use of the twist-proof; ^ J y, the holding circuit ΗI 0 0 acts as the vibration of the inverter circuit can be stopped. [Embodiment 2] Fig. 4 is a circuit diagram showing the structure of a discharge lamp lighting device of Embodiment 2 of the present invention, and the action pole of Fig. 2 is 4 w ^ M Mo 4 (a) to (e) Description of the operation of the lamp unit. In Figure 4, for the meeting a is 丨! The components of the same function and the components of the same components are given the same reference numerals, and the description thereof will be omitted. In the embodiment, the preheating timer circuit i7 is added with a timer for setting a predetermined warm-up period for the high-frequency current of the lamp; the diode 2 1&gt; 8 ' is in the protection detection circuit of the discharge lamp The resetting means for resetting the timing of the warm-up timer circuit; and the NpN transistor 71 disables the protection action of the discharge lamp during the warm-up timer. &quot; In Fig. 4, the capacitor "a" which sets the oscillation frequency of the oscillation control circuit is smaller than the capacitance 16 of Fig. 1 which is not shown in Embodiment 1. The preheat timer circuit 17 and the oscillation control circuit 4 are the same as Vcc. For the electric drive power supply, the capacitor and capacitor Ua will be completed after the preheating timing period is over.

1290010 V. INSTRUCTION DESCRIPTION (15) Parallel, such that the capacitance of capacitor 16a is equal to capacitor 16.

The PH terminal of the preheating timer circuit is connected to the A of the NPN transistor 71. The emitter of the i-electrode NPN transistor 71 is connected to the cathode of the DC power source i to the base of the NPN transistor 33. The anode of the drain and diode 18 and the preheat timer circuit 丨7 "the cathode and the cathode of the diode 31 are connected. ' Ding operation, the holding circuit H2 0 0 is attached to the holding circuit H1 〇〇 two poles In addition, in the structure of the preheating timer circuit? {1 terminal in the pre-door: the standard, the RS terminal has a reset by setting the L level: in accordance with the operation mode 4 of Figure 4 and Figure 2 The operation of the second embodiment is shown in Fig. 4 'sending the DC power supply "Temple" using the oscillation control: the frequency alternately drives the switching elements 2 and 3. The electric tower 4 uses the function of the preheating timer circuit to drive at a high frequency when the discharge lamp is turned on, and the mound and the load circuit preheat the filament in comparison with the lighting. The vibration of the "brothers become smaller" discharge lamp does not reach the preheating timer circuit during the period of the container 163 parallel 'vibration frequency control circuit 4 resonance frequency of the resonance sharpening becomes larger; The large voltage that can be turned on is applied to the discharge. At this time, the discharge lamps are all normal, and the switching time of the frequency to the lighting frequency is short, = positive and negative, during which the discharge lamp is positive and negative. There is a limited N· community stop + cycle there is unbalanced current flow 2148-6268-PF (N2); Ahddub.ptd page 20 1290010 &quot;&quot;&quot;&quot;丨&quot;- five, invention description (16 During the period (Fig. 2, 14 1~4 2), the voltage is not about 〇 state / Bao 0 holding lightning = the malfunction of the control circuit 4 of the earth debt measurement circuit D100 is stopped ^ H20 〇 action, has occurred The oscillation may be 'if according to the second embodiment, in the on state, the holding circuit is not activated during the operation due to the turning off of the transistor 71. (3) The operation is such that the discharge lamp is normally ΡΗ Ϊ Ϊ Ϊ H 器 circuit 1 7 After the timing period is over (time t43), the sub-level becomes low level, NPN electro-crystal y circuit D100 and the signal conversion circuit c J ^ do not pass through, the soil detection action, in the ί: rear discharge lamp to maintain the electric paste action due to the end of life, etc., at V. Keep the oscillation control electric timer circuit 17 meeting Frustration on the work ^ 动作 动作 动作 , , , , , , , 动作 动作 动作 动作 动作 动作 动作 动作 动作 动作 动作 动作 动作 动作 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 According to the second embodiment, according to the second embodiment, the NPN transistor 71 is set to be invalid because the output of the soil detecting circuit d 1 〇〇 and the signal turn, 100 is set in the pre-impressed im/thermal period. It can prevent the malfunction caused by the temporary occurrence of the discharge balance during the start-up operation from the start of preheating. ^ The condition of the circuit yn circuit H200 is operated by the reset preheat timer;;:: between the restarts The case can also be set in the preheating embodiment 3. Fig. 5 shows the construction of the discharge lamp lighting device of the third embodiment of the present invention. Page 21 2148-6268-PF (N2); Ahddub.ptd 1290010 V. Description of the invention (17): Circuit: In Figure 5: for the same as Figure 4 showing Embodiment 2: The same reference numerals are given to the components, and the description is omitted. This example is to stop the vibration of the inverter circuit and to install at least the discharge lamp of the lamp in the case where the discharge lamp of the lamp is added in the second embodiment. The situation makes the inverter circuit oscillating on the detection circuit CN1 00. f Figure 5, the detection circuit of the discharge lamp is installed (^1〇〇, the diode "the δ port resistance of 48 and 49" The connection point is connected, the other word cathode is connected to the negative electrode of the DC power source 1 via the filament of the discharge lamp, and the anode of the diode 47 is connected to the anode of the diode 46, and the cathode is connected to the filament and the DC power supply via the discharge lamp. The negative electrode is connected. Further, the other end of the resistor 48 is connected to Vcc, and the other end of the resistor 49 is connected by the resistor 50 and the cathode of the DC power source 1. The capacitor 62 is connected between the anode of the diode 46 and the cathode of the DC power supply j. The base of the NPN transistor 53 is connected to the junction of the resistors 49 and 50, the emitter is connected to the cathode of the DC power source 1, and the collector is connected to the emitter of the PNP transistor 34. A series circuit of a resistor 51 and a capacitor 52 is connected between the Vcc and the base of the NPN transistor 53. σ Further, the relationship between the resistance values of the resistors 48, 49, and 50 and the filament resistance values of the discharge lamps 7, 11 is set so that the following equations (1 〇 ), (丨丨), and (12) are satisfied. V10=(Rfx Vcc)/(Rf+R48)+〇.6 (10) (R50x VI0)/(R50+R49)&lt;VBE53 (11)

1290010 V. INSTRUCTIONS (18) (R50x Vcc)/(R50+R49+R48)&gt;&gt;VBE53 (12) However, the symbols of the above formula are as follows.

Rf ··Discharge lamp 7,11 the maximum value of the filament resistance R48 ·•Resistor 48 resistance value R49: resistance 49 resistance value R50: resistance 50 resistance value VBE 5 3 : NPN transistor 5 3 base · shot The value of the forward voltage limit of the poles is further represented by the value of the forward pressure drop of the 0.6 of the diodes 46 and 47. Further, the resistor 57 is connected between the positive electrode of the direct current power source 1 and the connection point of the light combining capacitor 5 and the choke coil. Next, the operation of the third embodiment of the present invention will be described with reference to Figs. First, the plate type A of the discharge lamp lighting device to which the discharge lamps 7 and 1 are mounted will be described. When the DC power supply 1 is supplied, the control circuit drive voltage Vcc is supplied by a circuit (not shown). When the supply of V c c is started, the N P N transistor 5 3 is turned on by supplying the base current from V c c via the resistor 5 1 and the capacitor 52 (during the period from t71 to t72 in Fig. 6). However, since the discharge lamp is connected and the equation (11) is satisfied, as shown in Fig. 6(b), the NPN transistor 53 becomes non-conductive at 172, and the oscillation control circuit 4 drives the inverter circuit, and the discharge lamp becomes illuminable. After the inverter circuit operates, as shown in Fig. 6 (a), a negative voltage is generated in the capacitor 6 2 based on the negative electrode of the DC power source 1 (the potential at the junction of the resistors 48 and 49 is negative), the NPN transistor

1290010 V. Description of invention (19)

After the body 53 becomes a non-conducting state. Next, the mode β of Fig. 6 is in the case of the discharge lamp 7, but in this case as well, the discharge lamp 7 can be turned on because the equation (j j is satisfied).

In the case where the discharge lamp 11 is not installed and the above-mentioned mode A, as in the case where the discharge lamp 7 is not mounted in the first half of the mode D, as in the mode B, the discharge lamp 丨丨 can be turned on, and the discharge lamp 11 is mounted. This is obviously followed by the case where the discharge lamp is not equipped with mode c. In this case, the 'NPN transistor 53 becomes conductive due to the satisfaction of the equation (12). The third terminal of the oscillation control circuit 4 is leveled via the diode, and the inverter circuit cannot be oscillated. Next, a mode d in which the discharge in the operation during the operation in which the discharge lamp 7 is not mounted and the discharge lamp 11 is attached is removed from the lighting device will be described. In the case of installing one of the two lamps, the inverter oscillates and the discharge lamp is illuminated as described above.

Here, when the discharge lamp u is removed at time ti01, the potential of the capacitor 62 (the potential at the junction of the resistors 48 and 49) rises from the negative potential, and at time u Μ becomes the equation (12), the transistor 53 is self-conducting. Becomes conductive. Therefore, since the oscillation control circuit 4 s ^ is low level via the diode 31, the inverter circuit becomes unable to oscillate. &amp; Zihan is right in the state of the A type A, or mode b, the discharge lamp becomes the end of the life due to the discharge of the discharge material of the filament, and the oscillation control is performed by the ±detection circuit 〇 〇〇 and the signal conversion circuit CV1 00 This state is continued after the oscillation stop terminal § of the circuit 4 becomes a low level, which is the same as in the first and second embodiments.

1290010 V. INSTRUCTIONS (20) In the first and second embodiments, in order to get rid of this state, it is necessary to cut off the DC power supply 1 and replace the discharge lamp with a good one, and then send the DC power supply 丨, but connect the power supply of the DC power supply 1 When the system is connected to the discharge lamp lighting device or other electrical appliances, the power supply of all the electrical appliances connected to the power supply system is cut off. According to the embodiment, when the DC power supply is applied, the discharge lamp including the defective discharge lamp is removed from the discharge lamp I, and the NpN electric body 53 is turned on, since the voltage is passed from the Vcc via the resistor. The current flowing to the transistor 34 and the NPN transistor 33 flows to the NpN transistor 53 which is turned on, and the conduction state is not maintained, and the pNp transistor 34 &amp; NpN transistor 33 becomes non-conductive. Next, the normal discharge lamp 7 is mounted on the right, the NPN transistor 53 becomes non-conductive, and the inverter circuit oscillates again. ^In addition, the negative side of the DC power supply of the discharge lamp installed is being hoisted, the filament of the choke coil is completely disconnected, and the current is supplied from the DC power supply. = The pole flows to the capacitor 23 via the resistor 57 because of the voltage rise. The oscillation of the inverter circuit is stopped by the action of the holding circuit H1 00. Further, the resistor 57 and the coupling capacitor 5 may be connected in parallel. As shown in the above description, according to the third embodiment of the present invention, since only the == device is equipped with at least one discharge lamp, the frequency conversion path can be oscillated, thereby preventing the discharge lamp from being completely unloaded. Tang Zuo ^, after detecting the discharge lamp is bad and continue to maintain the vibration of the inverter circuit, do not have to cut off the DC power supply, remove the discharge lamp

1290010 V. INSTRUCTIONS (21) f ‘If a normal discharge lamp is installed, the inverter circuit ^: discharge can be repaired and replaced without affecting the operation of other electrical appliances connected to the power system. In addition, the detection circuit CN1〇() structure mounted on the discharge lamp is another structure having the same function. Of course, the electric system of the above-described embodiment 4 represents the fourth embodiment of the present invention. The structure of the discharge lamp lighting device is the same as that of Fig. 5, and the same components as those of Fig. 5 showing the third embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The Benbe example uses a discharge lamp mounting and air leakage detecting circuit CND200 instead of the detecting circuit CN1〇〇 mounted on the discharge lamp of the third embodiment, and the discharge lamp mounting and the air leakage detecting circuit CND200 are attached to the frequency conversion. Oscillation of the circuit * The circuit that stops the oscillation of the inverter circuit due to the fact that the airflow of the discharge tube becomes internal and becomes undischargeable. In Fig. 7, the anode of the diode 61 is connected to the anode of the diode 45, and the cathode is connected to the cathode of the diode 45. κ Next, the operation of the embodiment 4 of the present invention will be described based on the mode 5 and Fig. 7 of Fig. 2 . In Fig. 2 mode 5 is the period from time t5 to t6. The discharge lamp 7 is in a normal discharge state during the period of time 15 U 5 3 , and in a state where the discharge tube is cracked and the air flows into the inside (hereinafter referred to as a leak state) at the time 15 3 , the discharge lamp 11 is normal during the period. status. If DC power is supplied at time 15 1 , during the preheating period (Fig. 2)

2148-6268-PF(N2); Ahddub.ptd Page 26 1290010 V. Time for the invention (22) t5 b t52) The discharge lamps 7 and 1 1 are normally discharged. ^ If the discharge lamp 7 becomes a leaking state at time t53, its impedance becomes much larger than that of the positive 禚, and the sharpness of the resonance of the discharge lamp load circuit L1 〇〇 also becomes large, and the inflow current to the discharge lamp load circuit L1 0 0 Increased than normal discharge. Therefore, the voltage drop of the discharge lamp 7 at the filament increases, and the negative charging voltage of the capacitor 62 via the diode 46 also increases. Here, if the voltage of the Zener diode 44 of the signal conversion circuit CV1 适当 is appropriately selected, the negative voltage obtained by the NPN transistor 4 〇 according to the capacitance at the normal discharge becomes 62, according to the gas leakage state. The voltage obtained by the capacitor μ becomes non-conductive (the collector becomes a high level), and the leakage voltage is equal to or lower than the base voltage f of the NPN transistor 40 which is applied by the added diode 61. As a result, the collector of the NPN transistor 40 becomes a high level, the holding circuit H100 operates, and the oscillation of the inverter circuit stops and continues at time t54. As shown in the above description, according to the fourth embodiment, in the case where the air discharge lamp becomes a leaky state, the signal conversion circuit cvl〇〇 is held in accordance with the detection voltage of the discharge lamp and the measurement circuit CND200. The milking line H1 00 operates to prevent the discharge lamp from being in an unlit state. A large resonance current flows to the discharge lamp load circuit and the inverter circuit is damaged. Further, in the present embodiment, the air enters the discharge lamp and becomes ^ In the case of dioxins, but in the case of discharge lamps without cracks but due to the discharge lamp at the end of the life of the discharge lamp, and the discharge of the filament, the two discharge lamps with the same illumination state can also identify two action waveforms. No luminescence

1290010 V. INSTRUCTIONS (23) Lights. EMBODIMENT OF THE EMBODIMENT OF THE INVENTION The structure of the discharge lamp lighting apparatus of the fifth embodiment of the present invention is the same as that of Fig. 1 of the embodiment, and the same reference numerals are given to the components. Description.兀=Examples and corresponding discharge lamps corresponding to the set of soil detection circuit "measurement circuit D1 〇〇, (four) diodes will be each generation, the detection output line or connection (WIRED 〇 R), set the right, r out °Γΐ: 阴极100 of the Zener diode 36 cathode connection, negative detection; 2 and t谠 conversion circuit cvm Zener diode 44 anode negative connection two: the soil detection circuit D 2 0 〇 Connected in Figure 8 'Resistors 81, 82 in series, the ring 6 of the resistor 81 is connected to the far-pile &amp; 碥 and anti-~ line of the discharge lamp 7, and the other _ Λ 2 of the resistor 84 is connected in parallel. Connected, resistor 85 = circle 1 〇 and discharge lamp 11 connection point and resistor 82 in parallel;; = source 1 of the negative connection. Capacitor 83 cathode connection, - 桎俨 and resistor 85 in parallel. Dipoles 87 and 88 The diodes 88 are connected to the connection points of the resistors 81 and 82, and the f-pole and the resistor of the “ are connected to the connection point of 85. The resistor 81 is connected to the anode of the "=... connection point. The cathode of the pole body 90 and the poles of the resistors 84 and 85 are connected. °, the connection point of 8 and the cathode of the Zener diode 36 2148-6268-PF (N2); Ahddub.ptd Η Page 28 1290010

V. Description of the Invention (24) The connection point of the one-pole body 8 9 and 90 is connected to the anode of the Zener diode 4 4 . The operation of the fifth embodiment will be described with reference to Figs. 8 and 9 . In Fig. 9, in the case of mode 6 〇 time 16 0 to 17 0, the discharge lamps 7 and 1 j are both normal, and the discharge lamps 7 and 11 are turned on when the DC power supply 1 is supplied. In the case where the discharge lamp is normally discharged, since the discharge voltages are substantially equal during the positive and negative half cycles, the voltages of the capacitors 83 and 86 which are the integral circuits of the voltages across the discharge lamps are substantially zero. Therefore, the holding circuit Η1 〇 〇 does not operate and the discharge lamp continues to be lit. Next, during the period of mode 7 0 system time 17 0 to 18 0, after the direct ail power supply 1 is sent at time 17 0, the discharge material of the filament on the side of the anti-current coil 6 is consumed at time 17 1 , and the discharge lamp 11 is normal. . In Fig. 9, when the DC power is supplied at time t70, the discharge lamps 7, u are being lit. At time t71, the discharge material of the filament on the choke coil side of the discharge lamp 7 is consumed, and the voltage of the discharge half cycle of the discharge corresponding to the side of the discharge material is increased as compared with the normal discharge. ^ That is, in mode 70, the discharge voltage of the negative half cycle increases.

Therefore, as shown in the voltage waveform of the capacitor 83 of FIG. 9(a), the voltage of the NPN transistor 40 of the signal conversion circuit C VI 00 becomes a standard level, and the holding circuit is maintained. When the emitter of the PNP transistor 34 is changed, the § terminal of the oscillation control circuit 4 becomes a low level, and the inverter stops, and the state continues. The pole is stopped at the time t72 of the capacitor 83, the npn transistor 40:

1290010 V. INSTRUCTION OF THE INVENTION (25) The above describes the discharge of the discharge material of the filament on the side of the choke coil 6 of the discharge lamp 7 and the fact that the discharge lamp 1 is normal 'but the discharge lamp 7 is normal, and the anti-flow coil 1 of the discharge lamp 11 The consumption of the discharge material of the filament on the 0 side can also stop the oscillation of the inverter circuit, which is obvious. Next, in the period of the mode 80, the time is 18 0 to 19 0, after the DC power supply 1 is sent at the time 18 0, the discharge material of the filament on the negative side of the DC power supply 1 is consumed at the time 18 1 , and the discharge lamp 11 is normal. . In Fig. 9, the discharge lamps 7, 11 are normally turned on when the DC power is supplied at time t80. When the discharge material of the filament on the negative side of the DC power source 1 of the discharge lamp 7 is consumed at time 18 1 , for the same reason as the mode 70, as shown by the voltage waveform of the capacitor 8 3 in Fig. 9 (a), The time 18 1 detects the positive voltage 'the emitter of the PNP transistor 34 of the holding circuit H1 00 becomes the low level, the S terminal of the vibration I control circuit 4 becomes the low level, the oscillation of the inverter circuit is stopped, and the state is continued. If the oscillation is stopped, the capacitor 83 and the NpN transistor 4 are turned to a low level at time t82. 〃

The above describes the electrical material consumption and discharge lamp of the filament on the negative side of the DC power supply of the discharge lamp 7! i is normal, but in the discharge lamp 7 is discharged and 11 of the DC power supply 1 on the negative side of the filament discharge material, $:: ' or 'one of the discharge lamp DC power supply! The negative side i; In the case of quality consumption, it is also obvious that the vibration plate of the inverter circuit can be stopped. 1 as shown in the above description, if only in accordance with this embodiment 5

2148-6268-PF(N2); Ahddub.ptd Page 30 1^0010 V. INSTRUCTIONS (26) The normal condition of the discharge lamp can be continued, regardless of the type of discharge lamp at the same point p J '. Wait, the rated voltage (rated electricity,) f will be placed, the rated current of the lamp is roughly the same as the type of the discharge lamp, and the various types of discharge lamps are turned on, and the abnormal state such as the end of the inverter's electrical life is safely stopped. Therefore, it is not necessary to reduce the number of parts used for the lamp units of the discharge lamp path (1) 00 and the holding circuit H100 or the inventory management model, and it is possible to reduce the number of lamps used for the production of only the U-lamps, but it is not possible. of. When the month/light is 3 or more lamps, the circuit is second, the conversion circuit CV1°0 and the holding structure can of course be constructed, and the invention has the same function. The output connection is discharged via the anti-flow line. After detection; exceeds the predetermined limit, and is roughly equal to the fact that the package's engagement lamp and the connection of the ring and the positive and negative of the ring stop, and the positive and negative capacitor DC contact and circuit are set, the voltage state is followed by the voltage phase voltage detection. The measuring circuit, and the series circuit of the inverter circuit and the anti-current coil are connected according to the negative pole of the sequence source, and the voltage between the coupling capacitor and the negative pole of the DC power source is averaged as the detection voltage of the positive and negative voltage detecting circuit The range is timed to stop the oscillation of the inverter circuit; in the case of using the same lighting device to illuminate a plurality of discharge lamps with different rated currents,

ΪΗ 2148-6268-PF(N2); Ahddub.ptd Page 31 1290010 V. INSTRUCTIONS (27) After the abnormal state such as the end of the detection life regardless of the type of discharge lamp, the operation of the inverter circuit can be safely stopped. Therefore, it is not necessary to select the circuit constant of the holding circuit optimally for the type of the discharge lamp, and it is possible to reduce the type of the parts for producing the lighting device or the inventory management model.

2148-6268-PF(N2); Ahddub.ptd第32页

I 1290010 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram showing the configuration of a first embodiment of the present invention. Fig. 2 is a waveform diagram for explaining the actions of the first, second and fourth embodiments of the present invention. Fig. 3 is a circuit diagram showing the construction of a DC power supply for a discharge lamp lighting device of Embodiment 4 of the present invention. Fig. 4 is a circuit diagram showing the configuration of a second embodiment of the present invention. Fig. 5 is a circuit diagram showing the configuration of a third embodiment of the present invention. Fig. 6 is a waveform diagram for explaining the operation of the third embodiment of the present invention. Fig. 7 is a circuit diagram showing the configuration of a fourth embodiment of the present invention.

I Fig. 8 is a circuit diagram showing the configuration of Embodiment 5 of the present invention. Fig. 9 is a waveform diagram for explaining the operation of the fifth embodiment of the present invention. •, the light source of the power supply 1 electric power amplifier Mingliuhe said a straight ^ Tiger ~ ~ 8 mouth Wan 1 5 7 1 Fu body pole •, road electricity ·, circle •, § 4 pieces U time pole element:; L /; fixed two SWT heat 7-10 pre 4, ~, 7 6 6 14 3 5 7 ~ resistance; 6 1 ~ diode; 62 ~ capacitor; 71 ~ NPN transistor;

Vcc~ control circuit drive voltage; D1 00~ soil detection circuit; H100, H2 0 0~ hold circuit; CV1 00~ signal conversion circuit; Vcc~ control circuit drive voltage; L100, L110~ discharge lamp load circuit; CN1 0 0 ~ discharge lamp mounted and leak detection circuit;

2148-6268-PF(N2); Ahddub.ptd Page 33 1290010 Schematic description of CND2 0 0~ discharge lamp installation and air leak detection circuit 0 &lt;1 1111 2148-6268-PF(N2); Ahddub. Ptd第34页

Claims (1)

1290010 VI. Patent application scope 1. A discharge lamp lighting device, including: DC power supply; frequency conversion test φ # current; and circuit, convert DC from the DC power supply to high frequency to discharge the circuit, w from The high-frequency current of the inverter circuit is characterized by: a power supply voltage detecting circuit, and a series connection circuit of the output connection of the frequency converter circuit and the anti-current coil in this order via the discharge lamp and 'Contact L disk ί = negative connection, the voltage between the light-combined capacitor and the negative pole of the DC-carrying power supply of the anti-current coil is averaged; and the detection of the positive and negative electric house detection circuit When the spine of the pre-positive voltage is exceeded, the inverter continues the stop state. The oscillation of the circuit is stopped, and the scooping red is as in the discharge lamp lighting device of the first application of the patent scope, i is connected by an L resistor, one end of which is connected to the positive pole of the DC power source, and the capacitor is connected to the connection point of the choke coil. The other end and the coupling 3 · a kind of discharge lamp lighting device, including: DC power supply; current change:: circuit, (4) DC conversion of the DC power supply to high frequency, the load circuit 1 uses the high frequency from the inverter circuit The current is characterized by: 2148-6268-PF(N2); Ahddub.ptd Page 35 1290010 VI. Patent application range Positive and negative electric capacitors and negative poles connected to maintain positive and negative power to stop the state 4 ·If applicable, including the range of the number conversion 5. The circuit frequency circuit 5. If the application includes the negative electrode and the voltage is detected, the current is discharged, and the range of the voltage continues. Please open the positive output of the patented positive and negative power supply for the vibration to stop. Please use the patented discharge lamp installed at the other end of the connected diode and the series circuit of the capacitor and the capacitor to make the inverter completely unloaded. · As in the patent application, including the negative pole of the discharge lamp power supply and the second negative electrode connected to the diode and the capacitor in series with a discharge lamp, #, and the series of positive and negative electric lights of the series The first, the pressure detection is the highest level and the first and upper detectors of the arrester are identified by the arrester. The frequency converter surrounds the first, upper and lower terminals through the capacitor circuit. The circuit of the wheel connection is detected after the averaging of the discharge lamp and the DC voltage; and "the detection voltage of the voltage detection circuit is stopped by the oscillation of the inverter circuit: pre-τ I ' and the discharge lamp of 2 or 3 items The lighting device, the negative signal detection circuit of the circuit exceeds the voltage, and the stop state of the circuit is maintained in the case of the standard voltage. k 2 or 3 a lamp lighting device, a measuring circuit, having a filament of one end and a DC power lamp and a negative pole of the DC power source, the circuit 'when the current flows to the diode to mount the discharge lamp, when at least one can be oscillated, The discharge lamp circuit stops vibrating. The 2 or 3 item of the rose lamp lighting device, the 耽 detection circuit, has a terminal and a series circuit of the filament of the DC discharge lamp and the DC power source, and the current is discharged to the second identification. Light, when at least the circuit is installed to perform an oscillating action, 2148-6268-PF(N2); Ahddub.ptd Page 36 1290010 VI. Patent Application Scope When the lamp is not installed or the discharge lamp becomes abnormal due to the leaking state, the inverter circuit stops oscillating. 7. The discharge lamp lighting device of claim 1, 2 or 3, wherein: the preheating timer circuit has a timer for setting a predetermined warm-up period for a high-frequency current flowing to the discharge lamp; The switching device disables the output signals of the positive and negative voltage detecting circuit and the signal converting circuit during the warm-up period. 8. The discharge lamp lighting device of claim 7 wherein the resetting device, the discharge lamp is not installed, or the timer of the preheating timer circuit is reset during the period in which the inverter circuit continues to stop oscillating . 9. The discharge lamp lighting device of claim 4, wherein each of the positive and negative voltage detecting circuits corresponding to each of the discharge lamps is configured to detect positive and negative detection output lines of the positive and negative voltage detecting circuits via the diodes Or connected to output to the signal conversion circuit or the hold circuit. ί 2148-6268-PF(N2); Ahddub.ptd第37页