TW543345B - Lighting device of discharge lamp - Google Patents

Abstract

The object of the present invention is to provide a lighting device of discharge lamp. A Zener diode for by-passing the gate current of a switching device in a pre-heat timer period can adopt the component with a wide varying range, so as to surely keep oscillating even when the surrounding temperature is changed. To solve the problem, the lighting device of discharge lamp is provided with a discharge lamp loading circuit; a choke coil 4 connected to a frequency converter circuit, a discharge lamp 5 and a coupling capacitor 7; and a pre-heat timer circuit. After applying DC power source 1, in a predetermined timer period, the voltage bypass occurred in the sub-windings (ab, cd) of the coil of switching devices 2, 3 driving the frequency converter circuit is operated on the switching devices 2, 3 after a predetermined period of each driving cycle of the oscillating frequency, thereby increasing the oscillating frequency of the switching devices 2, 3.

Description

543345

V. Description of the invention (1) Technical field of the invention The present invention relates to a discharge lamp lighting device using an electric lamp from an inverter circuit. Asking about electric power amplifier conventional technology Fig. 5 shows a circuit diagram of a conventional discharge lamp lighting device. It is a DC power source obtained from a commercial power supply, and 2 and 3 are structured, so 1 is a switching element composed of 0-channel MOSFET, 4 is used to limit the amplifier ^

Current has two auxiliary windings, cd, anti-current coil, 5 series discharge lamp Γ6 \ capacitors connected in parallel with the discharge lamp, 7 series coupling capacitors, 丨 〇 and 丨 丨 are M0SFET2 start circuits composed of resistors and capacitors The two secondary windings ab and cd of the current-resistant coil 4 are respectively connected to the MOS SFETs 2 and 3 through the resistors 8 and 9 to form MOS SFETs 2 and 3 to interact with each other. 2 0 and 21 are timer circuits composed of resistors and capacitors, 22 and 27 are Zener diodes, 2 3, 2 4 and 2 9 are resistors, 2 5 and 2 6 are transistors, 2 8 and 3 0 is a diode. In addition, Fig. 6 shows a configuration example of the DC power source 1 when a DC power source is obtained from a commercial power source. As shown in FIG. 6, the AC power output from the commercial power source 1 a is structurally subjected to full-wave rectification by the diode bridge 1 b, and then smoothed power is used.

The container 1 c is smoothed and is output to the load circuit as a DC power supply. The operation of the discharge lamp lighting device circuit of the conventional example shown in Fig. 5 will be described below. First, when the DC power supply 1 is supplied, the starting current from the resistor 10 and the capacitor 11 are used to alternately drive the n-channel MOSFET at a high frequency, so that the discharge lamp 5 is turned on. At that time, in the case where the discharge lamp 5 was not discharged, the anti-current coil

2148-4672-PF (N) '»Ahddub.ptd Page 4 543345 · ^. V. Description of the invention (2) 4 |, \, resonance of LC series resonance circuit composed of electrical appliance 6 and capacitor 7; This is hereinafter referred to as Q), and a large voltage is generated across the capacitor 6. Use :: change: the filament of the electric lamp 5 is subjected to a large voltage during the period of non-heating, so-called cold start, the k 'package life is shortened. The pre-heating timer circuit 41 is set for the prevention of broadcasting. The following hibiscus 9 _! Is connected to the τ state part of the next day, and the resistance 20 and the capacitor 20 are connected in series with the DC power supply 1 and the voltage is reduced. The body 30, the cathode is connected to the positive pole of the DC power source 1, and is connected to the electrical resistance Zener diode 22 'the cathode is connected to the anode of the diode 30; Λ; 24, the anode and the power source 1 at the Zener diode 22 The negative electrode BIL! Transistor 25, the base is connected to the connection point of the resistor 23 and the resistor 24, and the negative electrode of the power source 1, the collector is connected to the resistor 29 and the power source i, and the transistor 26, the base and the transistor The collector of crystal 25 is connected to the original and 7 negative electrodes. The anode 28 of the Zener diode 27 is connected from the collector to the cathode 28 of the Zener diode 27 and the gate of the n-channel MUbl · ET3.极 连接。 Extremely connected. Leiyang 9, the voltage of the second capacitor 21 is determined by the Zener diode 22, the resistance 23, and the voltage of the second capacitor. The "source" acts on the base of the transistor 26 by the resistor 29, so that the transistor 26 becomes 0N. By using the two-body Π and the path 26 of the transistor 26 and the inter-body pole of the transistor M0_, the gate voltage becomes lower, and the period of the n-channel rib 8 ^ 3 becomes shorter, increasing the η-pass f MOSFET2, 3 vibration frequency. (This period is hereinafter referred to as the warm-up timing: monthly.) Therefore, the LC resonance consisting of the current-resistant coil 4, capacitors 6, and 7 = Q of the circuit, and small crossover, the discharge lamp 5 will not start cold. Then, when the voltage of the capacitor 2 丨 rises, the transistor 25 becomes ON and the transistor 26 becomes 0ρτ.

543345

A large voltage is generated in the container 6, and the discharge lamp 5 is turned on. Since the equivalent resistance of the discharge lamp 5 and the discharge lamp 5 is connected in parallel with the capacitor 6, the q of the LC resonance circuit including the discharge lamp 5 becomes small, and the stable lighting state is maintained thereafter. Problems to be Solved by the Invention However, the conventional discharge lamp lighting device has the following problems when the inputs of the transistor 26 and the power supply 1 are continuously turned ON at the same time during the preheating timer period. The discharge lamp lighting device shown in Fig. 5 requires the following formula (1) in order to continue oscillation when the transistor 2600N is used. 7 VD28 + VD27 + VCE26 > VGS3 (1) Here, VD28: two poles Forward voltage drop VD 2 7 of body 28: Zener voltage VCE 2 6 of Zener diode 27 · Collector at transistor 2 6 0 N • Inter-emitter voltage VGS3: Gate of η channel M0SFET3 • The threshold voltage between the source and the Zener diode 27 is based on the relationship between the threshold and the threshold voltage between the source and the source of the n-channel MOSFET3. Practically, a relatively small Zener voltage value above about 3.5V is selected. For an example of a Zener diode having a Zener voltage to this extent, the characteristics of RD3 · 3ES (Zener voltage 3 · 3V) made by NEC are shown in FIG. 7. Fig. 8 is a waveform diagram showing waveforms of various parts of the circuit of the discharge lamp lighting device of the conventional example. Figures 8 (A1) and (A2) respectively show the voltage between the secondary windings cd during the warm-up timer period and the lighting period, and Figures 8 (B1) and (B2) respectively show the warm-up timer period and the lighting period The Vce voltage of the transistor 25, Fig. 8 (C 1) and (C 2) respectively show the voltages during the warm-up timer period and the lighting period.

2148-4672-PF (N); Ahddub.ptd page 6 543345 V. Description of the invention (4) Vce voltage of transistor 26, Figures 8 (D1) and (D2) respectively represent the preheating timer period and the lighting period The gate-source voltage of M0SFET3. It can be seen from FIG. 7 that when the Zener current is 5 m A (the Zener voltage specified by this product), the Zener voltage is 3 · 3 V. Therefore, the Zener voltage increases when the Zener current increases. When the Zener current decreases, the Zener voltage decreases. The Zener voltage is 1 V or less, the Zener voltage is 3 V or less, and the Zener voltage is 0 · 1 1 m A, and the Zener voltage is 2.5 V or less. It is known that a large voltage occurs between the secondary windings cd of the anti-current coil 4 and the Zener voltage is selected according to the condition that the current of the Zener diode 27 is large, so that when the formula (1) is satisfied, the anti-current In the condition that only a small voltage occurs between the secondary windings cd of the coil 4 immediately after the oscillation starts, the current of the Zener diode 27 becomes smaller, because according to the condition, the Zener voltage also becomes smaller, which cannot satisfy the formula (1), There is a problem that the oscillation cannot continue. In order to avoid this problem, according to the condition that a small voltage occurs between the secondary windings cd of the anti-coil coil 4 so that when formula (1) is satisfied, the condition that a large voltage occurs between the secondary windings cd of the anti-coil coil 4 is satisfied. The current of the nano-diode 27 increases, so the Zener voltage also increases, and the anode voltage of the diode 28 increases. The transistor 26 cannot sufficiently bypass the gate current of the n-channel MOSFET 3 through the transistor 26. It is impossible to shift the oscillation frequency to the problem of high frequency where cold start does not occur. As shown above, in the conventional example, the transistor 26 and the power supply 1 are not related to the magnitude of the voltage or the presence or absence of the voltage generated in the secondary winding cd of the anti-current coil 4 (Figure 8 (A1)). The unsynchronization of the input becomes 0N (Figure 8 (D1)). It becomes an operation used in a region where the current of the Zener diode 27 is small to a large region. When a Zener diode is selected, consider

2148-4672-PF (N); Ahddub.ptd Page 7 543345 V. Description of the invention (5) The Zener voltage is greatly changed due to the change in Zener current, and the Zener voltage of the diode 2 7 needs to be changed. The range is limited to a narrow range. | ^ Difficult to buy Zener diodes and expensive. 'Yes, in the above formula (1), there is a characteristic that the temperature decreases as the threshold voltage between the gate and the source becomes larger, for example, the FS10VS-12 series has a temperature range of about 7. 5mV / ° C, The temperature coefficient of the forward voltage drop of the polar body 28 when you are ready to wear becomes larger when the temperature decreases. At the Shixi Diode 2.3 · mV / ° C, the η channel M0SFET3 and Zener-decay 97 — _ β 儿 你,, J + 祎 · 彳. ~ Main—p +, Qiao, the temperature of the inner polar body 27 starts at low, w: Second: The formula (1) is affected by the ambient temperature, and the right side of the 'moving' formula becomes larger, which is impossible. The discharge lamp lighting device of the present invention that continues to vibrate is to provide a discharge lamp lighting, """, which can continue to maintain the vibration cover, and at the preheating timing; during the electric timer and for Ambient temperature; :::;:? With a wide range of components, AiDong can continue to vibrate with certainty. In the discharge lamp lighting device of the present invention, the DC-to-DC power supplied by the DC power source = the power source, the inverter Is circuit which is connected to the inverter circuit, a six-bell tail stage, and the lightning lamp / claw coil composed of the discharge lamp load, The discharge lamp and the coupling capacitor of the anti-current coil of the capacitor are closed for the next day. "The discharge lamp load circuit is provided with the following features: the switching element of the inverter circuit is set, and the circuit of the special timer period is set up. After this DC power supply, in the predetermined period mn \ 2148-4672-PF (N); Ahddub.ptd 543345 at each drive cycle of the vibration plate frequency V. Description of the invention (6) '' " ----- 2 after The bypass voltage of the secondary winding of the coil driving the switching element of the inverter circuit will be bypassed to act on the switching element to increase the switching element oscillation frequency. Also on the low potential side of the switching element of the inverter circuit A preheating timer circuit is connected between the switching element and the source of the switching element. A preheating timer circuit is connected between the switching element and the source of the switching element on the high potential side of the inverter circuit. Frequency is the circuit The switching element is composed of an n-channel MOSFET and a p-channel MOSFET, and the secondary winding is shared by the ^ -channel MOSFET and the MOSFET. Also, the predetermined period until the bypass is set to at least 1/4 of the oscillation frequency. Within the cycle. In addition, the power of the preheating timer circuit is obtained from the secondary winding of the coil. Embodiments of the invention FIG. 1 is a circuit diagram of a discharge lamp lighting device according to Embodiment 1 of the present invention, FIG. 2 ((A1) To (D2)) are waveform diagrams showing the operation of the main part of the circuit. In Figure 1, 1 is a DC power source obtained from a commercial power source, 2 and 3 are switching elements composed of N-channel MOSFETs that constitute an inverter circuit, 4 Series · Current-limiting coils with 2 secondary windings ab and cd to limit the current of the discharge lamp, 5 series discharge lamps, 6 series capacitors connected in parallel with the discharge lamp, 7 series coupling capacitors, 10 and 11 The starting circuit of M0SFET2 composed of a resistor and a capacitor, and the two secondary windings ab and cd of the anti-current coil 4 are connected to the gates and sources of the MOSFETs 2 and 3 respectively through resistors 8 and 9 to form M0SFET2 and 3, which are turned on and off. OFF.

2148-4672-PF (N) i Ahddub.ptd Page 9 Surface dry; fixed: i, Figure 2 illustrates the action. Figure mn'u2) "2 (BU, (B2) each represents the voltage between the auxiliary windings d between the predetermined number ^, Figure M ... The transistor during the 疋 & 'period and the lighting period

543345 V. Description of the invention (7) ΐ: ί ;: the sum of the high-frequency current flowing to the load circuit of the discharge lamp between f, 7H t 1 series-pole body, the secondary winding cd 4 of the anti-current coil 4 On the side of the operating power supply, one L voltage is smoothed and the timer circuit 41 is obtained. The preheating timer circuit 41 is composed of the following components, + fl ± π, the diode 31 and the electric circuit ^ 9 +, * / 偁忏 建 烕, 疋 时 杰 部, by resistance 2. And capacitors; two; 30% 2 ”points connected to the negative electrode of power supply 1 connected to capacitor 21 Si :: nanodiode 22 'cathode and resistors 20 and 22 anode and power source resistance 23 and negative electrode 23 and Resistance day 24 'at the connection point of Zener diode body resistance 23 and resistance 24, Chara #, electric day body 25, base and collector via resistor 2 9 ϋ, "emitter and power supply 1 Negative connection, sub d is connected to the electric body 7 1 1 _3 closed-end resistor 9 connection end and the power supply k = = body 25 collector connection, emitter ^ ^ ^ ^ ^ 27 ^ ^ /-^ 28 ^ 7 Ϊ ^ # 'Gate connection of M0SFET3; Second-pole body 28 and eta pass connection, cathode and transistor M anode and transistor 25 emitter body 33 are connected in parallel. The wood is not connected, and the capacitor 34, and the diode 33. The difference between the known examples is that a diode SFETrr gate is provided :, ^ M0SFET3, the gate resistance 9 connection terminal ^,

543345 V. Description of the invention (8) The Vce voltage of the body 25, Figures 2 (C1) and (C2) respectively represent the Vce voltage of the transistor 26 during the warm-up timer period and the lighting period, and Figure 2 (D1), ( D2) The gate-source & voltage of M0SFET3 during the warm-up timer period and the lighting period are shown separately. In addition, FIG. 2 corresponds to the diagrams § (A 1) to (D 2) shown in the conventional example. In FIG. 1, after the power source 1 is turned on, the n-channel MOSFET is driven at a high frequency by using the start-up energy from the capacitor 11 to interact. At this time, the voltage of the capacitor 21 will be kept OFF until the voltage rises to a voltage that can drive the base of the transistor 25 (Fig. 2 (B1)). '' In the conventional example, the cathode of the transistor 25 is connected to the positive electrode of the DC power source j through the resistor 29, but in this embodiment, the gate resistance of the secondary winding C (in j and the n-channel M 0 SFET 3) The 9-connected terminal d is connected, and the waveform corresponds to the waveform in Fig. 2 (a 1). At this time, the d terminal of the secondary winding Cd of the anti-current coil 4 is a negative half cycle (Fig. 2 (A 1)) 'via The resistor 29 charges the capacitor 34 with the negative polarity of the base of the transistor 26. In this case, the charging voltage value is limited by the forward voltage drop voltage of the diode 33 and becomes about 0.6V. That is, in the secondary winding When the resistance cd2d terminal 'is negative, the transistor 26 is turned off (Fig. 2 (C1)). Secondly, when the secondary winding electric current C is reversed to become d 子 and the child is a positive half cycle, the resistance is 2 g and negative The half-cycle has the opposite polarity to charge the capacitor 34. Here, the values of resistor 29 and capacitor 34 are selected. The values of Shigang 9 ^ | and 仏 4 are shown in Figure 2 CC 1). The time until the mule reaches a positive large peak value 7 makes the voltage of the capacitor M larger than the threshold voltage of the base of the transistor 26. The gate-source voltage of η channel M0SFET3 exceeds its threshold

2148-4672-PF (N); Ahddub.ptd Page 11 543345 V. Description of the invention (9) When the voltage value (Figure 2 (D1)) is set to time 11. After the time t1, if the voltage of the capacitor 34 reaches the threshold voltage of the base of the transistor 26, the transistor 26 becomes on during time t2 (Fig. 2 (C1)). By passing through the diode 28, Zener The diode 27 bypasses the gate current of the n-channel M0SFET3, and the gate voltage becomes lower. The conduction period of the n-channel M0SFET3, s: is short, and the oscillation frequency of M 0 SF Ε Τ 2 and 3 becomes high, which can prevent the discharge lamp. 5 Cold start. Here, the voltage of the resistor 9 and the Zener diode 27 is selected so that the voltage of the d terminal of the secondary winding at time t1 is larger than the threshold voltage between the gate and source of the η channel M0SFET3, and The current of the pole body 27 does not become much lower than the prescribed current of the Zener voltage. When the d terminal of the secondary winding becomes negative again, the capacitor 34 is charged as the base voltage of the transistor 26 becomes negative potential via the resistor 29, and the transistor 26 is turned off (Figure 2 (C1)) . After that, the charging voltage of the capacitor 21 rises, and the operation is repeated until the transistor 25 becomes on (the state of FIG. 2 (B2)). After the warm-up timer period, when the base voltage of transistor 25 is biased to a conductive state (Figure 2 (B 2)), when the d terminal of the secondary winding is positive, transistor 25 becomes ON, and The crystal 26 is turned OFF (FIG. 2 (C2)). That is, the transistor 26 is always ONF after the 'warm-up timer period. Therefore, at each period of the oscillation frequency, the transistor 26 is turned ON after the time t1 between the gate-source voltage of the n-channel MOSFET3 exceeds its threshold voltage. As shown above, 'If according to the embodiment 1 of the present invention, since the period between the oscillation frequency and the gate-source voltage of the n-channel MOSFET 3 exceeds the threshold voltage time t 丨The transistor 26 is changed to 0N.

2148-4672-PF (N) Ahddub.ptd Page 12 543345 V. Description of the invention (10)-During the thermal timer, the discharge lamp 5 can continue to oscillate at an oscillation frequency that is not even cold-started. Because the Zener diode 2 7 used in the circuit that bypasses the gate current of the MOSFET switching element during the preheating timer period can be avoided in a region with a small Zener current, a wider range can be selected. The variation range of the Zener voltage value can solve the problems of difficult to buy and expensive. In addition, if the voltage of the d terminal of the secondary winding at the time when the transistor 2 6 is turned on is selected to be much larger than the threshold voltage between the gate and source of the n-channel MOSFET3, it can be prevented from being affected by the n-channel MOSFET3 or the second electrode. The influence of the temperature characteristics of the body 28 and the like can solve the problem that the oscillation cannot be continued such as the start-up at a low temperature. In addition, the voltage during the warm-up timer between the secondary windings cd becomes the maximum at 1/4 of the period of the oscillation frequency (Figure 2 (A1)), then it decreases, and then becomes larger as 11 becomes 26 The gate-source voltage of the n-channel MOSFET3 decreases during turn-on (Figure 2 (D1)). Therefore, if the time 11 during the warm-up timer period until the private day body 2 6 becomes 0 Ν is selected to be less than 1/4 of the period of the oscillation frequency during this period, the gate and source of the n-channel M0SFET The inter-voltage = will be reduced, which can prevent the voltage of the d terminal of the secondary winding from being excessively reduced or oscillated. Changes such as changes. Embodiment 2 '" Fig. 3 is a circuit diagram showing a discharge lamp lighting device according to Embodiment 2 of the present invention. In the first embodiment, the gate and source of the preheating timer circuit 41 * n channel MOSFET3 of FIG. 1 are connected, but the second embodiment

2148-4672-PF (N); Ahddub.ptd Page 13 543345 V. Description of the invention (11) Preheat timer circuit 41 1 Gate and source between n channel M0SFET2 connected to the high potential side of power supply 1 It is connected so that the gate current of the n-channel MOSFET 2 is bypassed during the warm-up timer. The other structures and operations are the same as those of the first embodiment, and the description is omitted, but the same effect as that of the first embodiment can be obtained. Embodiment 3 FIG. 4 is a circuit diagram showing a discharge lamp lighting device according to Embodiment 3 of the present invention. This embodiment is a structure in which the n-channel MOSFET 3 of FIG. 3 in FIG. 3 is replaced with a p-channel MOSFET in the n-channel. The gate and gate of M0SFET2 and η channel M0SFET3 are connected in common. The source is connected to the secondary winding 4 of the anti-winding coil 4 via resistor 8, and the other structures are described from $ 豳 fuk and the operation and implementation of Example 1. It is the same, the description is omitted, but the circuit construction can be made ^ ...-ten main w 搂 ten μ 摄 to make room soap, to obtain the same effect as the condition of f in Example 1. In addition, in Embodiments 1 to 3, it is determined whether the resistance 20 and the capacitance of the timer circuit 41 should be crying. The preheating period during the… state is the same, because the diode 31, the capacitor driving power source, and the conventional example do not add special circuits, and can also be associated with the secondary winding of the anti-current coil 4. T package π 1 wooden straight grab 〖Biocouple port ^ ^ χ ^ ^ ^ ^ Frequency frequency voltage rectification and smoothing to obtain one of the switching element MOSFET2 and MOSFET3 gate, source-to-source speed, eight crimes 4 miles j Reverse connection can simplify the effect of the circuit invention. The present invention is implemented as described above. The fruit is not formed, and has the following effects.

2148-4672-PF (N); Ahddub.ptd Page 14 543345 V. Description of the invention (12) Inverter circuit converted from high-frequency current by direct current supplied by the power source, and by a current-resistant coil connected to the inverter circuit, The discharge lamp load circuit composed of a discharge lamp and a coupling capacitor is used to drive the switching element of the inverter circuit by the secondary winding of the anti-current coil provided in the discharge lamp load circuit. After the DC power supply, in a predetermined timer period, after a predetermined period of each driving cycle of the oscillating frequency, a voltage bypass occurs in the secondary winding of the coil driving the switching element of the inverter circuit, and acts on the The switching element increases the oscillation frequency of the switching element, and can continue to oscillate with the oscillation frequency that has not reached the cold start during the warm-up timer. In addition, the zener diode used for bypassing the gate current of the switching element during the warm-up timer can use a wide range of components, and can continue to oscillate reliably with respect to ambient temperature fluctuations. In addition, the preheating timer circuit is connected between the gate and source of the switching element on the low potential side of the inverter circuit. During the preheating timer period, it can continue to oscillate at the oscillation frequency that has not reached the cold start. . In addition, the zener diode used for bypassing the gate current of the switching element during the warm-up timer can use a wide range of components, and can continue to oscillate reliably with respect to ambient temperature fluctuations. In addition, because the preheat timer circuit is connected between the gate and source of the local potential side switching element of the switching element of the inverter circuit, it can continue to oscillate reliably at the oscillation frequency before the cold start during the preheat timer. . In addition, the Zener diode used for bypassing the gate current of the switching element during the warm-up timer can use a wide range of parts, and

2148-4672-PF (N) i Ahddub.ptd Page 15 543345 V. Explanation of the invention (13) The temperature fluctuation can also be surely continued. Because the inverter circuit cuts the MOSFET structure, the secondary winding is shared as the MOSFET. It can be simplified, because it will be within 1/4 period until the bypass, which can prevent future | or oscillation stops, the zener diode is surrounded, and it is not easy to be affected by the circuit, because the secondary winding of the self-coil No special circuit is added to the resistor, and it can also oscillate with one of its gate and source. The switching element is composed of an n-channel MOSFET and a p-channel, an n-channel MOSFET, and the p-channel circuit. The predetermined period is set so that the voltage at the d terminal of at least 4 windings of the oscillation frequency is excessively reduced. The Zener voltage can be selected to have a large fluctuation range, such as the influence of fluctuations in ambient temperature. The power of the preheat timer circuit is obtained, and the connection of the switching elements M0SFET2 and M0SFET3 can simplify the circuit.

2148-4672-PF (N) Ahddub.ptd Page 16 543345 Brief description of the drawings Fig. 1 is a circuit diagram showing a discharge lamp lighting device according to the first embodiment of the present invention. Fig. 2 is a waveform diagram showing waveforms of various parts of the circuit 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 a second embodiment of the present invention. Fig. 4 is a circuit diagram showing a discharge lamp lighting device according to a third embodiment of the present invention. Fig. 5 is a circuit diagram of a conventional discharge lamp lighting device. Fig. 6 is a circuit diagram of a DC power supply of a conventional discharge lamp lighting device. FIG. 7 is a characteristic diagram showing an example of characteristics of a Zener diode. Fig. 8 is a waveform diagram showing waveforms of various parts of a circuit of a conventional discharge lamp lighting device. Explanation of symbols 1 ~ DC power supply; 1a ~ parent current power supply, 1b ~ diode bridge; 1c ~ electrolytic capacitor; 2 ~ MOSFET; 3 ~ MOSFET; 4 ~ current-resistant coil; ab ~ Secondary winding resistance; cd ~ secondary winding resistance of the anti-current coil 4; a ~ main winding resistance of the anti-current coil 4;

2l48-4672-PF (N); Ahddub.ptd page 17 543345

2148-4672-PF (N); Ahddub.ptd

Page 18

Claims (1)

543345 VI. Scope of patent application 1 · A type of inverter power supply is provided by the inverter circuit, which is the secondary of the negative current coil of the discharge lamp. It is characterized by setting the pre-timer to bypass the voltage that drives the transformer. 2 · If you apply a pre-connect between the inverter circuit poles. 3.If you apply a pre-connect between the inverter circuit poles. 4 · If you apply for the inverter circuit's component, it will be used for secondary winding. 5. · If you apply, the c lamp lighting device within 1/4 cycle includes: DC power supply, inverter circuit that converts this DC to high frequency current, and connected anti-current coil, discharge lamp and light Capacitor circuit is used to drive the switching element of the inverter circuit with windings set in the load circuit of the discharge lamp, in: a thermal timer circuit, after sending the DC power, in the drive cycle of the oscillation frequency The predetermined period of time is the secondary winding of the switching element of the circuit. The secondary winding of the switching element is used for the switching element, and the vibration of the switching element is increased by the discharge lamp lighting device of item 1 of the patent range. Among them, the low potential side of the switching element Gate and thermal timer circuit of switching element. The discharge lamp lighting device according to item 1 of the patent, wherein the gate and thermal timer circuits of the high-potential side switching element of the switching element. The discharge lamp lighting device of the first item of the patent scope, wherein the switching element is composed of n-channel MOSFET and 5-channel MOSFET as the n-channel MOSFET and the p-channel MOSFET respectively discharges in the first, second, third or fourth item. The predetermined period of time until the lamp is turned on is set to at least the frequency of vibration and the source of the vibration 2148-4672-PF (N); Ahddub.ptd Page 19, 543345 6. Application for patent scope 6. For the application of patent lamp scope item 1, 2, 3 or 4 for the discharge lamp lighting device, in which the secondary winding of the self-coil Obtain power to the preheat timer circuit. 7. For the discharge lamp lighting device according to item 5 of the scope of patent application, wherein the secondary winding of the coil obtains the power of the preheating timer circuit. 2148-4672-PF (N); Ahddub.ptd Page 20