TW545087B - Lighting device for discharge lamp - Google Patents

Abstract

The object of the present invention is to provide a lighting device for discharge lamp, which can reduce the current variation of discharge lamp caused by the characteristic variation of the discharge lamp. In addition, the same lighting device can light on plural discharge lamps having substantially the same rated currents but different rated powers. To achieve the object, the lighting device of the discharge lamp includes: a frequency converting circuit; a discharge lamp loading circuit comprising a choke coil 16, a discharge lamp 17 and a coupling capacitor 19 connected to the frequency converting circuit; a frequency detecting device 71 for detecting the oscillating frequency of MOSFET 13 and 14; a frequency-voltage converting device 72 for converting the oscillating frequency detected by the frequency detecting device 71 into DC voltage; and a control device 73 for increasing/decreasing the output voltage of DC power based on the output of the frequency-voltage converting device 72, thereby controlling the output voltage of the discharge lamp 17.

Description

545087 V. Description of the invention (1) Technical field of the invention The present invention relates to the high frequency power generation technology of the high frequency power circuit of the Wenbinjie circuit using the discharge lamp lighting device of the incoming lamp. Figure 6 shows the conventional discharge lamp point. In Fig. 6, 1 is a quotient, and 2 is a circuit diagram for styling and placing clothes (known example 1). Bridge, 101 is a two-pole electric boost converter that converts a diode bridge 2 to a full-wave rectification of a commercial power supply, and one end of the 4 series = -4 pin to the other-end and diode 6 that converts to a smooth DC voltage. The anode = the positive output terminal of the body bridge 2 is connected and the reactance of the anode of 6 and the diode bridge 2 /; the IL coil, 5 is connected between the diode M0SFET, and 7 is connected between the 纟 diode terminal The capacitor between the n-channel terminals and the negative output of the 8-pole body bridge 2.糸 Resistance in series, and capacitor 7 and 3 are boost converter control circuits to obtain the voltage of the output voltage divided by Lei Yang ^ You can change the connection point of 101 and the connection points of 8 and 9 The voltage is the input and the channel is MOSFET5, so that the voltage at the connection point and the internal reference voltage-纟 'are controlled to obtain a fixed voltage across the capacitor 7. In addition, 13 and 14 constitute a switching element composed of n-channel m0sfet of the inverter circuit, 16 is a current-resistant coil with two secondary windings ab and cd for limiting the current of the discharge lamp, and 17 is a discharge lamp.丨 8 series capacitors connected in parallel with the discharge lamp, 19 series coupling capacitors, i0 & u are the starting circuits of the η-channel MOSFET13 composed of resistors and capacitors, and the two secondary windings ab and cd of the anti-current coil 16 The gates of MOSFETs 13 and 14 are connected via resistors 12 and 15,

545087

The sources are connected so that MOSFE13 and 14 are turned on and off alternately. The operation of the circuit of the conventional example 1 shown in FIG. 6 will be described below. In FIG. 6, when the commercial power supply 1 is supplied, a DC voltage at the connection point of the resistor 8 and the resistor 9 at the two ends of the capacitor 7 is consistent with the internal reference voltage of the boost converter control circuit 3, and is output as a DC power supply. From this DC power supply, the MOSFETs 13 and 14 are alternately driven at a high frequency by the starting current flowing through the resistor 10 and the capacitor 丨 丨, so that the discharge lamp 17 lights up 0 * FIG. 7 shows another conventional discharge lamp lighting device Circuit diagram (Knowledge Example 2). In FIG. 8, the same or equivalent parts as those in FIG. 6 are denoted by the same symbol iimV: the commercial power supply 1, the diode bridge 2 and the step-up: circuit part except the capacitor 7 in the switch 101 are replaced. The material 2 1 ^ is a current detection circuit of a discharge lamp 17 constituted by a converter, etc., 2 2 糸 strict frequency conversion, control circuit, built-in variable control voltage controlled oscillator / lower% is Vc.) Circuits with equal oscillating frequency, using the discharge lamp current detection, f channel as input 'excitation drive is composed of the n channels M0SFET13 and 14 ^ = frequency state circuit' so that the detection current of the discharge lamp 17 is always constant , Can be lit with the discharge lamp current, will not be affected by the surrounding temperature of the discharge lamp, aging and so on. π — ^ & By controlling the detection current of the discharge lamp 17 to a fixed value, it is possible to cope with a plurality of types of discharge lamps having the same amount of electricity and different rated power. Problems to be Solved by the Invention The circuit of the conventional example 1 is a so-called self-excited oscillator.

2148-4674-PF (N) .ptd ------ Page 6 545087 V. Description of the invention (3) Circuit, M0SFET1 3 count or load condition to discharge lamp 17 and then to rated voltage lamp device The title of the shared amount of discharge lamps. In addition, the problem of the control circuit in the present invention is to provide a surrounding operating temperature, the same lighting device of the present invention and various discharge lamps, the present invention is suitable and simple structure of expensive and complicated circuit often output Power is affected. The first fixed current phase wants to use a kind of discharge point that is difficult to use and various forces to light the problem. The first glance makes it possible for small light circuits to use multiple light circuits with different forces so that VC0, etc. are not required. 1 4 The driving frequency is affected by the constituent oscillations. Specifically, in the case of a discharge lamp having the same configuration as shown in the figure with the influence of the surrounding temperature, aging, etc. of the discharge lamp operation, the discharge lamp is slightly different, that is, in the case of a discharge lamp with different fixed power, the rated power corresponds to different The expensive and complicated Know-how 2 of the wheel / power generation has a Vc0 problem point that needs to be built in. The second purpose of solving the above-mentioned gate B lighting circuit of the device 'controlling the discharge lamp: the change in characteristics caused by aging, aging, etc. becomes clear. The second purpose is to provide a black rating that will be approximately the same as the rated current and obtain an electrical rating. Lighting corresponding to electricity. The third purpose of Ming is to provide a kind of black control to achieve the first and second control circuits mentioned above. Means for solving the problem The discharge lamp lighting device of the present invention includes: a DC power source obtained by stepping down, an inverter circuit that will be boosted by the DC or commercial power source or is / \ is a high-frequency current circuit, and & DC Conversion

545087 V. Description of the invention (4) The current coil and the discharge are used in the discharge lamp. The inverter circuit is set to detect the frequency and the voltage detection voltage; and control the DC power supply and the secondary voltage of the frequency anti-current coil to detect the voltage. In addition, the output of the frequency measuring device has an inverting input terminal with a voltage. In addition, the device of the frequency detection device is connected so that the output and the emitter are fed back according to the pressure of the light device. The discharge lamp load circuit composed of capacitors is connected with the auxiliary winding of the anti-coil coil to drive a component. It is characterized by including: frequency detection device W π I oscillation frequency; frequency-voltage conversion The detection vibration frequency of the device, two f, is converted to a direct current, and the output power of the discharge lamp is controlled in accordance with the output of the frequency-voltage conversion device 拎: I f liter P cowl '. I 'and 1 are set according to the oscillation frequency of the output circuit of the integrating circuit which will be set at the discharge lamp load circuit = > high-frequency voltage integration of resistance generation. -The voltage conversion device includes an operational amplifier, which detects the frequency into the non-inverting input terminal, and converts the output through the diode input to convert the peak value of the output of the frequency detection device into a straight DC voltage conversion device including: a rectifier circuit, a self-frequency The peak value of the output is the rectified voltage; and the non-inverting input terminal of the operational amplifier is connected to the rectified voltage of the rectifier circuit. The emitter f is connected to the base of the transistor's transistor. Phase input terminal electric output terminal and: The LU replacement operational amplifier includes the resistance of the positive connection of the electrical connection of the comparator and the oscillation frequency of the switching element detected by the negative field of the DC power supply when the oscillation frequency is lower than a predetermined value ,

2148-4674-PF (N) .ptd 545087, description of the invention (5) The control device controls the output voltage of the DC power supply to a predetermined value. The control device controls the output voltage of the DC power supply to be larger than a predetermined value for a plurality of types of discharge lamps having the same or approximately the same rated current, so that the plurality of types of discharge lamps can be replaced by the type & Embodiment of the invention "Fig. 1 is a circuit diagram showing the structure of a discharge lamp lighting device according to Embodiment i of the present invention, Fig. 2 is an explanatory diagram of operation waveforms, and Fig. 3 is an explanation of operation characteristics II ^ Fig. 1 2 A and 2 B The β in the first embodiment shows the positive output terminal and the negative output terminal of the diode bridge 2 of the Hinode full-wave rectification. The output of the diode bridge 2 is converted. In order to smooth the DC voltage, the η channel 7 between one end of the 4 series and the positive output terminal 2A and M: T of the diode bridge 2 is connected to the one pole body. The snow between the cathode of 6 and the electric terminal 2B of the diode η n ^ dazzle [the negative output of the electric steal Z. The 8 and 9 series resistors are connected in series with the capacitor 7 and output the electrical system voltage rise and pressure. Conversion: The factory controls the voltage to get the output voltage of the boost converter 1 0 1 m and the voltage is divided by the voltage of the gradual voltage. The η channel M0SFET5 is driven, so that the voltage at the point J is the input. Controlled in the capacitor:; ::: the voltage of the mountain point and the internal base, and 14 constitute the frequency conversion circuit to obtain a fixed voltage. Switching element, u is used to The current-limiting coil composed of ❶ and cd, which is limited by M0Sm, is 17 series; the electric current has 2 secondary windings. The Ningdun electric lamp ’1 8 series is connected in parallel with the discharge lamp.

545087 V. Description of the invention (6) Coupler, 19 series coupling capacitors, 10 and 丨 丨 are starting circuits of resistance and capacitor η channel M0SFET13, two secondary winding cores of the anti-current coil 16 ~ The resistors ^ and ^ are connected to each other at the ribs ^^ "to form M 0 SF Ε 1 3, 1 4 to interact with Ν, 〇FF. ° 71 is a frequency detection to detect the oscillation frequency of M0SFET13, 14 # Set 7 2. Set the frequency detection $ 7! The detected detection oscillation frequency is = frequency power conversion device, 73 is based on the frequency_voltage ;: The output of the boost converter 10 is stepped up and down to control the discharge lamp. The control device for the output power of 17. The frequency detection device 71 is composed of the following components: the connection point of the resistor 44, the nf Dotten FET 14, and the resistor 15 is connected in series with the secondary winding terminal of the anti-current coil 16; the transistor 43, the base The 4H ^ pole of resistors 44 and 45 and the secondary winding d are connected at the terminal side, and the collector is connected via the power source Vc of the resistor; and the capacitor 41 is connected to the transistor frequency. The voltage conversion device 72 is preempted as follows Fan a, operation amplifier 4 (hereinafter referred to as 0p amp), non-inverting input terminal : 4 / collector connection of 'inverting input terminal and an anode and a cathode connected to an output terminal t 39 of the two bodies; a capacitor and a resistor 38' in parallel between two radio transistor 43 extremely. In addition, it is called the integral circuit of the N-frequency voltage integration of the secondary winding of the anti-current coil of the discharge lamp load circuit. The control device 73 is composed of the following components: the driver, the rk power supply Vc, and the emitter of the transistor 43 = 'resistors 35 and 36' at the DC terminal via the resistors 34 and two Er '. "/ In the normal phase input < U pole Connection, inverting input terminal and

545087

The connection points of the resistors 3 5 and 36 are connected. Weng q 9 Recognizes the mountain 7 γ Aboriginal reverse connection, the resistance 32, connected between the inverting input sub-output of the ΑΑΡΡ33 and the output line + Ximen, and the resistance 31, Connected between the output of AMP33 and the connection point between resistor 8 and resistor 9. In addition, the drive power and control power Vc of the AMP33 and OP AMP40 are connected. Next, the basic operation will be described with reference to FIG. 3. Fig. 2 (a) shows the voltage of capacitor 41 when the oscillation frequency is low, Fig. 2 (b) shows the electric sound of capacitor 38 corresponding to Fig. 2 (a), and Fig. 2 (c) shows the voltage at high oscillation frequency FIG. 2 (d) shows the voltage of the capacitor 41 and the voltage of the f container 38 corresponding to FIG. 2 (c). Figure 3 (a) is the characteristic diagram of the oscillation frequency and the output voltage of the boost converter. Figure 3 (b) is the characteristic diagram of the output voltage of the boost converter and the discharge lamp. The force is shown in Figure 3 (c). The characteristics of the boost converter output voltage and discharge lamp power in the case of a plurality of discharge lamps are shown in Figure 1 after the commercial power supply 1 is put in. The output of the boost converter A DC voltage 'at the voltage of the connection point between the resistor 8 and the resistor 9 and the internal reference voltage of the boost converter control circuit 3 is output as a DC power source. The self-boost converter 丨 〇 1 uses the starting current flowing through the resistor 10 and the capacitor 11 to drive the n-channel MOSFETs 13 and 14 at high frequency alternately, and the discharge lamp Π is turned on. The transistor 43 of the frequency detection device 71 is turned on and off every other cycle due to the high-frequency voltage generated by the secondary winding cd of the anti-current coil 16 acting on its base via the resistor 44. At this time, after the transistor 43 turns from 0N to OFF, the collector voltage becomes the waveform shown in FIG. 2 (a) or FIG. 2 (c) by the integration of the capacitor 41 and the resistor 42.

2148-4674-PF (N) .ptd Page 11 545087 V. Description of the invention (8) a '--- The peak value of the integrated voltage is long when the 0FF period of the transistor 43 is long and is large during the OFF period. The situation becomes smaller. The ON period and the period are approximately equal. In other words, when the oscillation frequency is low, the peak value of the voltage of the capacitor 4 丨 becomes large as shown in FIG. 2 (a); and when the oscillation frequency is high, it becomes small as shown in 2 (c). The 0P AMP40 and the diode 39 of the frequency-voltage conversion device 72 are used to detect the voltage of the capacitor 41, and a DC voltage corresponding to the oscillation frequency is obtained at both ends of the capacitor 38, as shown in Fig. 2 (b) or Fig. 2 (d) As shown. The voltage of capacitor 38 acts on the positive phase input of 0p AMP33. It is amplified after comparison with a certain quasi-voltage supplied to the inverting input terminal of 33 from the connection points of resistors 3 and 6 and resistors 35 and 5, when the voltage of capacitor 38 is large. The output voltage of ⑽AMp ^ becomes large, and when the voltage of capacitor 38 is small, the output voltage of pAMp33 becomes small. The output voltage of the right 0P AMP33 becomes smaller, that is, the oscillation frequency becomes higher, and the potential at the connection point between the resistor 8Θ and the resistor 9 becomes lower, and the output voltage of the boost converter 1 01 becomes larger. This relationship is shown in FIG. 3 (a). In Fig. 3 (b), the relationship between the output voltage of the boost converter 101 and the power output of the discharge 1 ^ Π > is shown, but its characteristics are changed when the voltage of the boost converter is large and the discharge is discharged. The output power of the lamp 17 is also large; when the output voltage of the anti-lightning transition state 101 is small, the output power of the discharge lamp 17 is also small.矜 ΐ = Skull From the results shown in ^ 3 (a) and Figure 3 (b), it is known that the oscillation obtained by the small of 0ρ AMP33 刖 ... i and the secondary winding cd of the reactive current coil 16

2148-4674-PF (N) .ptd $ 12 pages 545087 V. Description of the invention (9) ---- Frequency 'is the corresponding change in the oscillation frequency detected by the frequency detection device 71, and, in the discharge lamp 1 7 When the output power is increased, the output voltage of the boost converter 101 is controlled to decrease, and the output power of the discharge lamp 17 is reduced; otherwise, when the output power of the discharge lamp 17 is decreased, the output is controlled to be the output of the boost converter 101. As the voltage increases, the output power of the discharge lamp 17 increases. In addition, the output power of the discharge lamp 17 is increased when the temperature around the discharge lamp 17 is increased or the rated power of the discharge lamp 17 is small. Moreover, by appropriately determining the integral constant of the resistor 42 and the capacitor 41 and the amplification factor of the OP AMP33, and appropriately determining the amount of change in the output voltage of the converter 1 0 1 with respect to the frequency fluctuation, or by the resistance μ and And the size of ^ 35 determines the reference lightning 1 & voltage of the inverting input terminal of OP AMP33, which determines the value of the oscillation frequency of the increase or decrease of the output of OP AMP33, ^ the output of these two converters 1 0 1 starts to decrease or increase The point of action. As shown above, the discharge lamp can be adjusted for the fluctuation of the oscillation frequency by changing the amount of change in the output voltage of 1§ 1 0 1 and the oscillation frequency at which the increase is reduced by θ 纟 ^. Therefore, the discharge lamp can be changed. The output power batch of 7 / k is made in advance, and the characteristics of the lamp due to the ambient temperature of the lamp, aging, etc., can also compensate the control when the oscillation frequency changes? The change in the output power from ^ & 17 has the effect of stabilizing the power of the discharge lamp by 2 lamps. Sichang Chengding also 'By changing the base voltage supplied to the inverting input terminal of the OP AMP33, the output power of the discharge lamp 17 can be controlled as the output voltage of the boost converter 101 can be increased or decreased. Predetermined value. "’

2148-4674-PF (N) .ptd Page 13 545087 V. Description of the invention (ίο) Secondly, according to FIG. 3 (c), the use of the same electric lighting curve in the same lighting device is described. S series discharge lamp lighting Power characteristics of the discharge lamp of the device ~ Multiple discharge lamps A, B, and r with the same rated power and different rated power + Righteous person l * ^ 情, and brother in Figure 3 (c), A, B and C indicate discharge The lamps A and B are represented by λγ <. The electric currents WA, WB, and WC (WA> WB> WC) of 夂 1 represent the forces of the discharge lamps A, B, and c. < As shown in Figure 3 (b) above, the output power of the boost converter 1 〇1 is proportional to the output power of the discharge lamp 17, the same, the voltage and lamp shown in Figure 3 (c) The discharge lamp power characteristic curve S, the discharge lamp A ^ electric lamp IJb ", and the 0 characteristic curve A of the device. Here, the discharge lamp A is almost the same. B and C also show the same power as in Figure 3? 1 Page 2 Line 2 (b). If the output voltage of the boost converter 101 is selected

The rated voltages of B and C are large in the inverter circuit: the difference between the mouth discharge lamp is irrelevant. As shown in Figure 3 (c), the power characteristic curve s of the discharge lamp of the current lighting device is due to the covered discharge lamp A and the discharge lamp. The power range of the booster converter can be changed by changing the output voltage M and the respective rated powers WA, WB of Cheng and discharge lamps A, B, and C and the corresponding values of WC. In the case of A, if the boost converter 丨 〇i is set to VA, the rated power ^ (the intersection of the curve s and the curve A ^^ In the case of the discharge lamp A, if the boost converter 丨 〇i is set The output voltage is ^, which can correspond to the self-rated power WB (the intersection of the curve s and the curve B). In the case of the discharge lamp c, if the output voltage of the boost converter 10 is set to be%, the self-rated power WC (curve S and the intersection of curve c). 1

2148-4674-PF (N) .ptd Page 14 545087 V. Description of the invention (11) Therefore, because of the same-lighting device, a plurality of discharge lamps with the same or approximately the same rated current and their rated output power pairs can be used. Types of discharge lamp lighting devices. In addition, in the present embodiment, the case of using a boost converter 1 〇1 is shown in the circuit for supplying the inverter, and it is used as a θ electrogen and a clothes displacer. A voltage converter can be used instead. In other words, according to this embodiment, because the same-lighting device can be used to light a plurality of discharge lamps with the same or approximately the same amount and their rated output power =, the types of the discharge lamp lighting devices can be reduced. The effect. Μ Embodiment 2 FIG. 4 is a circuit diagram showing a configuration of a discharge lamp lighting device according to Embodiment 2 of the present invention. In FIG. 4, the same reference numerals as those in FIG. 1 are assigned to or the same as those in FIG. 1 in Embodiment 1, and descriptions thereof are omitted. 〆 77 In Figure 4, the control device 7 3-6 is a 1-series diode, the anode is connected to the resistor 3, and the cathode and the resistor 8 are connected to the connection point of the resistor 9. In this configuration, only when the output voltage of the OP AMP33 becomes large and the forward current of the diode 61 flows, the output voltage of the boost converter 1 is reduced. Therefore, if the values of the resistors 36 and 35 are appropriately determined and the forward frequency of the forward current flowing from 0 PA MP 3 to diode 6 1 is determined in advance, the oscillation frequency of the gas is lower than this frequency and the discharge lamp When the power of 1 7 becomes large, the output voltage of the boost converter 101 is reduced, and the output power of the discharge lamp i 7 is suppressed from increasing. That is, if according to this embodiment, because the electric power of the discharge lamp 17 will not be greater than a predetermined value, 'it is advantageous in the thermal design of the lighting device, and the lighting device can be made 1 2148-4674-PF (N) .ptd 15th Page 545087 V. Invention Description (12) Type. In addition, a plurality of types with the same or approximately the same rated current on I are used. In the case where the exhaustion frequency is less than a predetermined value, the output power of the boost converter 101 can also be reduced. , Σ Electricity of embodiment 3: The structure of the discharge lamp lighting device of embodiment 3 of the present invention is slightly different; 5. For the same or equivalent part of Figure 1, the same exemption is given and the high frequency is set to about 4 ° κΗζ or higher, so as to avoid fluctuations in the range of about 4gkhz ~ iggkhz. . In Figure 2 (c), if the oscillation frequency is

The high-precision detection of the peak L and the fluctuation frequency has about 5V 0P ΛMP40 and two I-mesh f 仏 numbers. The peak detection device shown in Figs. 1 and 4 is a large device. There are high-speed and expensive AMPs that have over-speeds. It is necessary to have a fast and expensive pass rate of 0p galvanic electricity. Figure 5 consists of a positive-frequency conversion device 72 composed of the following components. The two-phase transistor 43 is connected to the collector and the cathode and AMP56 are connected. The diode 51 connected to the transistor 43 and the cathode connected to the diode 51 are output with a DC voltage: so that the two peaks of the capacitor 52 are combined to form the peak value of the triangular wave obtained; put 2148-4674-PF (N) .ptd Page 16 545087 V. Description of the invention (13) Electrical resistor 53, connected in parallel with capacitor 52 · nD Λ⑽ ^ The terminal is connected to the entire production of the rectifier circuit, and is connected to the base of the transistor 57 in the positive phase gear. Connection = :: Out and connected into the emitter with light 55 to the inverting input terminal == Emitter from the emitter to the human terminal and the transistor 43 via the diode phase. $ F〇P AMP56 anti-sun day limb 57 Between the emitter of the transistor 43 and the emitter of the transistor 43. In addition, the collector of the transistor 57 is connected to a DC power source Vc. Although not shown in the figure, the driving power source of the OP AMP56 is also connected to a DC power source. In FIG. 5, the following formula (1) holds.

VC52-VC41 -VD51 ⑴ Here, VC41: the peak voltage of capacitor 41 VC 5 2: the DC voltage VD 5 1 obtained at capacitor 5 2: the forward voltage drop of diode 5 1 is also actuated by OP AMP56 The inverting input terminal is the same as VC52 of formula (1), and the following formula (2) is established. VC52 = VR54 and VR58—VD55 (2) Here, VR54 VR58 VD55

The voltage across the resistor 54 The voltage across the resistor 58 decreases in the forward direction of the diode 5 5 If equation (1) is substituted into equation (2), the following equation (3) holds. VC41 -VD51 = VR58 -VD55 (3) After finishing the formula (3), the following formula (4) is obtained. VR58 Two VC41-(VD51 -VD55) (4) Here, if diode 51 and diode 55 are selected as VD51 = VD55, 2148-4674-PF (N) .ptd Page 17 545087 5. Description of the invention (14) The following formula (5) holds. VR58-VC41 (5) ^ That is, because the DC voltage equal to the peak value of the capacitor 41, which is the voltage corresponding to the oscillation frequency, is obtained at both ends of the resistor 5, 8, the inconsistent application shown in Figs. 1 and 4 is obtained. Example has the same effect. In addition, since the transistor 57 is connected as an emitter follower, the output impedance to the OP AMP33 can be reduced. As shown above, according to the present embodiment, the low-cost diode 51 and capacitor 52 are used to convert once the device that converts the sharp peaks of the two angular waves obtained at the capacitor 4 into the direct current. After DC, use low-cost low-speed 0P AMP56, connected to the emitter follower transistor 57, etc. to compensate the forward voltage drop of diode 5 丨 or make the output impedance of the obtained DC voltage smaller. Cheap and controllable up to a large oscillation frequency. β, according to this embodiment, since the output and input of the OP AMP56 is a DC voltage # ', a comparator which is cheaper than the OP AMP can be used instead. For example, "In the case of replacing the op AMP56 with a comparator with an open collector output" /, a resistor connected to Vc and a capacitor connected to the negative terminal of Vc to stabilize the operation can be added to its output terminal, which can be replaced. ADVANTAGE OF THE INVENTION The present invention has the following effects. The discharge lamp lighting device of the present invention is constructed as shown in the above description. It includes a DC power source obtained from a commercial power source, and a DC converter that supplies the DC power source. Inverter circuit for high-frequency current and the reactance connected to the inverter circuit

2148-4674-PF (N) .ptd

545087 V. Description of the invention (15) A current coil and a discharge lamp are used for the discharge lamp to be negatively connected to the inverter circuit. 9 The switching is detected and the frequency is detected and the voltage is installed. Also, due to the frequency of the secondary output voltage of the anti-current coil, the detection shear force is controlled to a predetermined value and the position of the coupling circuit switching element is detected, and the output rises to detect the power. The frequency of the vibration test is controlled according to the voltage drop, and it is controlled to place a discharge lamp load circuit composed of a high-frequency oscillator. The secondary winding of the 5 xuan current-resistant coil is driven and the driving characteristics are: Frequency-to-voltage conversion device, which measures the oscillation frequency and converts it to DC power frequency-to-voltage conversion device to control the output power of the discharge lamp; a predetermined value. The output frequency of the integrating circuit that integrates the frequency and voltage integration in the discharge lamp load circuit can be used to output the discharge lamp. Because the frequency-voltage conversion device includes an operational amplifier, the output of the frequency measurement device is input to the positive phase input terminal. The output is via a diode input: an inverting input terminal, and the DC voltage output by the frequency detection device can control the output power of the discharge lamp to a predetermined value. Converted to ... and, 'Because of the frequency-DC voltage conversion device includes: a rectifier circuit, the rectified voltage is obtained by measuring the peak value of the output set by the rate k; The rectified voltage of the rectifier circuit is connected to the base of the transistor connected to the emitter follower, and the emitter of the transistor connected to the emitter follower is fed back to the inverting input terminal voltage via the diode; No expensive, high-speed Op AMP is required. ^, Because the comparator is used to replace the operational amplifier, including the resistance from the terminal of the comparator and the positive connection of the DC power supply and the DC power supply

545087 V. Description of the invention (16) The capacitor connected to the negative pole can be replaced by a cheaper comparator. In addition, when the oscillation frequency of the detected switching element is lower than a predetermined value, the control device controls the output voltage of the DC power supply to a predetermined value, which can suppress the output power of the discharge lamp from increasing, which is advantageous in the thermal design of the discharge lamp. Can be miniaturized. In addition, the control device controls the output voltage of the DC power supply to be larger than a predetermined value for a plurality of discharge lamps having the same or approximately equal rated current, so that the plurality of types of discharge lamps can be replaced with one device, which can reduce the discharge lamp lighting. Type of device.

2148-4674-PF (N) .ptd Page 20 545087 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. Figs. 2 (a) to 2 (d) are explanatory views showing operation waveforms of the discharge lamp lighting device according to the first embodiment of the present invention. Figs. 3 (a) to 3 (c) are explanatory views showing operation characteristics of the discharge lamp lighting device according to the first embodiment of the present invention. Fig. 4 is a circuit diagram showing a structure of a second embodiment of the present invention. Fig. 5 is a circuit diagram showing a discharge lamp lighting device according to a third embodiment of the present invention. Fig. 6 is a circuit diagram of a conventional discharge lamp lighting device. FIG. 7 is a circuit diagram of a conventional discharge lamp lighting device. Explanation of Symbols 1 AC input power supply, 2 Diode bridge, 3 Boost converter control circuit, 4 Reactor coil, 5, 13, 14, 14 15 M0SFET, 6, 39, 51, 55 Diode, 7, 11 , 18, 19, 38, 41, 52 capacitors, 8 ~ 10, 12, 15, 3, 37, 42, 44, 45, 53, 54, 58 t resistance, 17 discharge lamps, 33, 40, 560P AMP, 43 , 57 transistor,

2i48-4674-PF (N) .ptd Page 21 545087 Brief description of the diagram 71 frequency detection device, 72 frequency-voltage conversion device, 7 3 control device, 101 boost converter, ab, cd auxiliary winding. _ · Η 2i48-4674-PF (N) .ptd Page 22

Claims (1)

545087 VI. The pressure line is changing the scope of patent application1. A discharge lamp lighting device, including the DC power obtained, the inverter circuit that will be supplied by the DC power = boosted or reduced frequency current of the power, and The DC conversion of the frequency conversion is composed of a coil, a discharge lamp and a switching capacitor: = the anti-current connection of the circuit, the anti-streamline load circuit provided by the lamp load circuit, and the switching element of the frequency circuit is used to drive around the resistance The feature includes: a frequency detection device f, which detects the switching element's vibration and direct frequency, and measures the voltage and voltage during the set-to-voltage conversion device, and converts the frequency detection device to an occupancy rate. The oscillation frequency is converted into a DC voltage; And, the inspection control device is set to control the discharge lamp according to the frequency-current electricity = output step-up and drop-down 2: if requested, the discharge lamp lighting force of item i in the patent scope. The 3 test device is based on the frequency of the high-frequency voltage integrated in the discharge lamp load, the secondary winding resistance, and the oscillating frequency of the switching coil switching element. Do not produce a voltage, check the discharge of the 1st or 2nd item of the patent application scope of the woman, and the frequency-voltage transfer is delayed—α electric point device, its input terminal, the frequency detection device :::::: The input is inverted. The large peak of the output is converted to a DC frequency 4 frequency ΓΛ special second range ㈣1 or 2 discharge lamp lighting device,-frequency-DC voltage conversion device includes: eight rectifier circuits, self-frequency / 、] The disaster peak of the government's output is rectified 2148-4674-PF (N) .ptd Page 23 VI. Patent application voltages; and op amps, connected to this / TJ rectified voltage, output and connection input terminals connected to the rectifier circuit to self-connect to become emitter follower The voltage of the base of the coupler is gradually fed back into the terminal. The emitter of 9 _ is used to reverse the comparator by :: J4, which is a discharge lamp lighting device of the item package, in which the positive pole of the DC power supply is connected to the output terminal of the comparator and the capacitor. 〃 And in connection with the negative pole of the DC power supply, please use the discharge lamp lighting device of the first or second patent scope, straight device: straight === when the vibration outline of the piece is lower than the predetermined value, control the claw power supply The output voltage is controlled to a predetermined value. φ Shi declares that the discharge lamp lighting device of item 1 or 2 of the patent scope, the device: for the rated current is equal to or approximately equal to a plurality of two kinds of electric power =: the output voltage of the current source is controlled to be greater than a predetermined value, so that a The plurality of types of discharge lamps can be replaced. Among them, the control device, wherein, the control device ^ The discharge lamp lighting device of item 3 of the scope of patent application, when the oscillation frequency of the detected switching element is lower than a predetermined value, the output voltage of the DC power source is controlled to a predetermined value. ^ 9 · The discharge lamp lighting device of item 4 of the scope of patent application When the oscillation frequency of the detected switching element is lower than a predetermined value, the output voltage of the DC power supply is controlled to a predetermined value. , 10 · If the discharge lamp lighting device of item 5 of the scope of patent application, in which the vibration frequency of the switching element of 10,000 k / th is lower than the predetermined value, the control device on page 24 2148-4674-PF (N ) .ptd 545087 The output voltage of the DC power supply is controlled to a predetermined value. 1 1 · The discharge lamp lighting device according to item 3 of the scope of patent application, wherein the control device controls the output voltage of the DC power supply to be larger than a predetermined value for a plurality of discharge lamps having the same or approximately the same rated current, so that ^ The plurality of discharge lamps can be replaced by wearing. & 1 2 · For the discharge lamp lighting device according to item 4 of the scope of patent application, wherein the control device puts a plurality of types with the same or approximately the same rated current. The predetermined value is large, so that the plurality of discharge lamps can be replaced with one device. 1. If the discharge lamp lighting device according to item 5 of the scope of patent application, wherein the control unit is configured to control a plurality of types of discharge lamps with equal or approximately equal rated currents, the output voltage of the 2 direct-current power supply is controlled to be larger than a predetermined value, This makes it possible to replace the plurality of discharge lamps with one installation. Page 25