TWI283426B - Zigzag topology for balancing current among multiple lamps - Google Patents

Abstract

An apparatus and method for balancing current in multiple negative impedance gas discharge lamp loads. Embodiments advantageously include balancing transformer configurations that are relatively cost-effective, reliable, and efficient. Embodiments include configurations that are applicable to an unrestrained number of gas discharge tubes, such as cold cathode fluorescent lamps. The balancing transformer configuration techniques permit a relatively small number of power inverters, such as one power inverter, to power multiple paralleled lamps or paralleled groups of lamps with balancing transformers coupling the lamps or groups of lamps in a zigzag topology. One embodiment of a balancing transformer includes a safety winding which can be used to protect the balancing transformer in the event of a lamp failure and can be used to provide an indication of a failed lamp.

Description

J8pif.doc IX. Description of the Invention: [Technical Field] The present invention relates to a balanced structure of a load current having a negative impedance characteristic. More particularly, the present invention relates to a balanced structure for currents used to drive a plurality of gas discharge tubes (e.g., a plurality of cold cathode fluorescent lamps (CCFLs)). [Prior Art]

Cold cathode fluorescent lamps (CCFLls) are used as light sources in a wide range of applications. For example, CCFLS can be used in a variety of luminaires, scanners, displays (e.g., liquid crystal display H (LCDS)), and a tissue-like towel. In recent years, the size of LCD displays has grown in a large proportion. Larger [Melons than 2 electric professional viewing H, plane to TV and high-resolution electricity. In this second attack and shirt other financial, usually make a shirt CCFLs. For example, the combination of =, ^FU is more commonly used in the month of the desktop LCD computer monitor. In another example of a larger flat screen TV, use

=' 32 and 40 CCFLs. Of course, the number of s used in any particular application can vary over a wide range. No. 2 CCFLS's fortune, we expect to reduce the size, weight and cost by inverting the CCFLS with less power. However, by a single one. The reversed-phase wire (4) CCFLS is more difficult to illuminate; when it is connected in series and when it is facing each other, the parallel-to-closed CCFLS will have other problems. When the lights in parallel 6 12834 are isolated. When the operation power of c ' drops as expected, the current balance in the parallel CCFLs is actually not easy to achieve. - The CCFLs and their helium gas discharge tubes show a hotter and brighter and more resistant characteristic when the CCFL lamp is in operation. The lower the impedance ship, the greater the flow of the suction (four). As a result, ^ CCFLs are connected in parallel without riding balanced materials, and some of the lamps are typically on the other, and other lamps are much brighter. In some cases, some of the lamps will be turned on, but, its lamp is _. In addition to the disadvantage of uneven brightness, brighter lamps can overheat and thus shorten their life. • A two-way (tw〇-way) balance transformer can be used to balance the current in the two CCFLs. The type of balance transformer can be formed on the same core by two identical windings and is sometimes referred to as "balun", although the name "dish" is also used in other types of transformer II. When the two-way (twG_way) balance transformer technology can be used in the operation of two CCFLs, the current is balanced, and works well~ In the case of a CCFLs--failure, a voltage difference across a two-way balance transformer Can become very high and accurate. This voltage difference can damage the traditional two-way balance transformer. In addition, with a two-way balanced transformer • ^ ί configuration is limited to the parallel connection of two CCFLs. Another disadvantage of the conventional balance transformer set is that electromagnetic interference (EM to suppression) can only be made relatively ineffective. [Invention] Embodiments of the present invention may advantageously include various balance transformer sets, which are more reliable and efficient. And the cost is lower. Embodiments include various groups that can be used to any number of gas discharge tubes (e.g., cold cathode fluorescent lamps). One application of cathode fluorescent lamps is a backlight in a liquid crystal display. 7 12834268pif. D〇c, balanced transformer configuration technology allows a small number (for example, one) of power converters to supply electrical power to multiple parallel lamps. Traditionally, driving multiple parallel lamps is difficult. This is caused by the negative impedance characteristics of the load. One embodiment is a lamp assembly that includes N lamps, where N is at least 3; and N-1 balance transformers. Each balance The transformer has two balanced windings, which are operated in parallel with pairs, and the tubes are connected in series to balance the currents of the respective pairs of lamps. For example, the first ends of the first pair of N lamps In operation Time-coupled to the first of the N_i balance transformers. The second end of the second pair of N lamps is lightly coupled during operation: N 1 of the equilibrium transformed state. One tube is the first pair The second end is shared with the first end. Therefore, each balance crimper connects the lamps in a sub-structure and the current level is balanced between the lamps. In the example, the lamp combination further includes another Nth balance transformer, which does not belong to one of the N-1 balance transformers. The Nth balance transformer is required to be in series with the Nth pair of lamps. Each of the Nth pair of lamps is only connected to one of the balance transformers during operation, and the embodiment is a lamp combination (following mbly), which includes: N lamps 2 2 is less than 3; and N_1 balance transformers, the electric k in the N lamps β is balanced. The self-balancing transformer is called the lamp of the pair __, so that the lamp is the second of the two devices, The two balance transformers are coupled to the common lamp at the end of the lamp that operates I283426s8pif.doc. The embodiment is a gas The method of parallel connection of electric lamps, the method is used for N lamps, where N is at least 3; with a first-class N-1 balance, the balance between the tubes is achieved by one of the balances. The current between the pair of lamps is balanced. One of the first pair of lamps is connected, and the second pair is overlapped, so that the lamp is shared by the two pairs; and = Alternating) forms a balanced transformer coupled to each lamp

At the end of the officer, the balance transformers of the N-1 balance transformers that are coupled to the common lamp during operation are coupled to the opposite ends of the shared lamp during operation. One embodiment is a plurality of parallel drives. A configuration of transformers for achieving a current balance between gas discharge lamp loads, the configuration comprising: N lamps, wherein N is at least 3; and means for achieving current balancing between the N lamps, the device having a A set of N-1 balance transformers that are alternately coupled to the end of the N-1 pair of overlapping lamps during operation. An embodiment is a lamp assembly comprising: N lamps including at least a first tube, a second tube and a third tube, each of the lamps having a first end and a first a second terminal; a first terminal and a second terminal receiving power from the inverter to drive 1^ lamps in parallel; and N_1 two-way balancing transformers configured in an alternating manner at the first terminal Between the first end and the second end and the second end, the current through the partially overlapping pairs of lamps is balanced. In one example of three lamps, the first terminal is coupled to the first end of the third tube when in operation and the second terminal is coupled to the first end of the first tube 128342s68pif.doc when in operation. The first two-way balance transformer is disposed in a current path between the first terminal and the first terminal of the first lamp-lighting officer, wherein a two-way balance transformer is configured to flow through the first lamp and the first The total current of the two lamps is balanced; the second two-way balance is changed (four) is arranged in the _ current path of the second terminal and the second end of the third and third lamps, and the second two-way balanced transformer group in i constitutes The money is balanced by the current of the second lamp and the first lamp. ~

One embodiment is a method for parallel connection of gas discharge lamps, the method comprises: providing at least three lamps; and alternating the two-way balance transformers = disposed at the ends of the partially overlapping pairs of lamps f, so that the lamps The current between the tubes is matched. For example, the current in the first pair of lamps is balanced by the second-stage equilibrium transformer ;; and the current in the second pair of tubes is balanced by the pressure-varying balance, and the second pair of towels A glimpse of the towel is shared with the first pair.疋

An embodiment is a method for parallel connection of a gas discharge lamp, the method comprising: providing a plurality of lamps, each of the lamps having a first end and a second end, and configuring a plurality of two-way balance in a zigzag structure The tube and the (fourth) tube are connected to the two-way balance transformer at the end of the operation, and the (n+1)th tube and the (n+2)th tube are operated. Lightly coupled to the other two-way balance transformer at the second end. One embodiment is a method for current balancing between a plurality of gas discharge lamp loads driven in parallel, the method comprising: distributing the current evenly between the first gas discharge lamp load and the second by the first two-way balance transformer Between the gas discharge lamp load; and the second two-way balance transformer to make the current 1283426. 68pif.doc = ground distribution in the second body "load and the third gas discharge lamp load between 0 kinds of target is A configuration of a plurality of transformers used for current balancing by parallel driving of the gas f, the matching: the one-way balance transformer distributes the current evenly between the first gas discharge lamp and the second gas discharge lamp load The device is 'and the current is evenly distributed between the second gas discharge lamp load and the second rolling body discharge lamp load. The ρ type ΓΓ! is a lamp assembly, which comprises: Ν a series of lamps taken in parallel, wherein _ one = ... into a sub-structure, so that N-1 balance transformers cross = weight = the end of the jug; And the Nth flat two = same tube, so that each of the N lamps is connected in series with the same number of balance transformer windings. One embodiment is a parallel arrangement of a gas discharge lamp: providing at least three lamps; a first-level method of the first-to-first end of the lamp, so that the first one is in the == nr road-type balance transformer In operation _ to the second brother knows 'to make the balance of the current in the second pair of lamps, the lamp =, the tube is shared with the first pair; and the third & k three pairs of lamps, so that == The machine is reached, which consists of a three-tube including a lamp and - from a second pair of lamps H ¥ 匕 5 of I28342^8pif.d〇c • One embodiment is a method for parallel connection of gas discharge lamps, the method includes 1 provides N lamps, wherein N is at least 3; and balances the current between the N lamps with N balance transformers, wherein at least one of the balance transformers is coupled to another balance transformer during operation The opposite end of a tube. •: The embodiment is a method for parallel connection of gas discharge lamps, the method package includes: providing N lamps, wherein N is at least 3; and providing N balance/variables, one of the balance transformers for each pair of lamps The current reaches a level _ $ ' J^N_1 balance transformers are arranged in a zigzag configuration such that N] balance transformers are alternately arranged at the ends of the partially overlapping pairs of lamps; and the Nth balance transformer is configured such that N Each of the tubes is connected in series with a balance transformer winding of the same number. One embodiment is a method for parallel connection of a gas discharge lamp, the method comprising: providing N lamps, wherein N is at least 3; and balancing the N lamps with N1, N The balance transformer further comprises N-1 balance transformers and an additional balance transformer, wherein the first part of the μ-balance transformer is coupled to the first of the N lamps during operation, and is grouped to make a first Balancing the current of the lamp or more of the first pair of lamps (the second part of the N-1 balance transformers is coupled to at least a portion of the N lamps at the time of operation) The ends are grouped to form a current in the second pair of lamps or more of the second pair of tubes, wherein the first pair of tubes or more of the first pair of tubes And a first pair of lamps or more of a second pair of tubes overlap but not the same; and an additional balance transformer configured to make each of the N tubes 12 I28343^8pi, The docs are all in series with the same number of balanced transformer windings.

One embodiment is a configuration of transformers for achieving current balancing between a plurality of gas discharge lamp loads driven in parallel, the configuration comprising: means for providing N lamps, wherein N is at least 3; and N A device for balancing the transformer to achieve a current balance between the N lamps, wherein at least one of the balance transformers is coupled to the terminals of the opposite faces of the other balance transformers during operation. 〇〇 ' ^ B

In one embodiment, each of the tubes is comprised of a plurality of groups (e.g., N tube groups) in a plurality of lamp combinations. Each tube group contains at least two tubes disposed in a subassembly of the tube (which is connected between the ends of the two groups). At least N-1 external balance transformers are combined to the N-tube to make the balance of each lamp group balanced. For example, the external-balance transformer is substantially similar to the above-mentioned two-way balance transformer and includes two The balance winding is lightly coupled to two different lamp groups to achieve a current balance between the two non-lamp groups. This is called an external flat ^ transformer separately on the money group to the two light tube group, the partial overlap = one time _ ^ at least - external balance transformer and to = Ν · 2 lights recorded mother - group The end of the _ _ to - external balance transformer. In an embodiment, one external balance transformer is turned to the = unit so that the end of each of the groups of lamps is combined - the external balance is in the embodiment, at least - the tube group contains one or more The internal balance changes to achieve a current balance between the lamps in the same-lamp group. For example, one lamp of the same-lamp group can be combined to an open type,"

13 I28342^8Pif.d〇c An internal balancing transformer of the glyph structure, closed, and/or, z-shaped internal balancing transformer of the glyph structure, or coupled to μ respective internal balancing transformers configured in a ring-balanced configuration . Other balanced configurations (for example, tree configuration, strip configuration or other similar configurations) are also possible. In the ring balance group, each lamp is connected in series with the main winding of a different internal balancing transformer and the secondary winding of the internal balancing transformer is coupled in a serial loop. In one embodiment, each of the external balancing transformers is substantially identical and each internal balancing transformer is substantially identical. In the application of the application, 20 lamps were combined into 5 groups of 4 lamps. 4 ☆ an internal balance transformer makes the balance between the four lamps in each tube group. In one embodiment, four internal balancing transformers are lighted to four of the closed zigzag configurations. For example, the first internal balance transformer is lightly coupled to the first end (or terminal) of the first and second tubes, and the second internal balance transformer is lightly coupled to the second and fourth ends of the second and third tubes. The internal balancing transformer is coupled to the first ends of the third and fourth tubes, and the fourth internal balancing transformer is coupled to the fourth tube and the second end of the first tube. In the example, four external balance transformers are coupled to the open sub-open/group ^5, and the five lamp sets are used to balance the current between the lamp sets. For example, the first-outer balance transformer is lightly coupled to the first - the end of the first group of the lamp group and the second lamp group, and the second external balance transformer is engaged to the end of the second group of the second lamp group and the third lamp (9), the third external balance is changed to C The end of the first group of the handle & to the first tube group and the fourth tube group, and the fourth internal balance to the end of the second 128343⁄4 68pif.doc group of the fourth freshman lamp group. In another application, 20 tube assemblies. In the embodiment, each one is supplied with a light transformer of 5, and it is compliant with the heart, and the "group of 4 internal balances - the lamp tube is rented. The five lamps are configured to make the same balance with each lamp. In another embodiment, the transformer is chopped, and the five internal balances of the read balance configuration are balanced. The glyph configuration and advantageously balances the even or odd number of tubes or groups of lamps. In a ring-balanced configuration or other internal transformers, the same to the individual tubes in the interior of the tube group At the end of the configuration, the internal flat_pressure|! can be alternately grounded to the end of each tube of different tube groups, and the tubes of different tube groups can be interlaced O^ntedeaved in the display panel) The arrangement is such that 'the adjacent lamps have internal balancing transformers on opposite sides of the tube, respectively, to minimize uneven brightness. a In one embodiment, four external balancing transformers are coupled to the closure. The four tube groups configured by the sub-shapes balance the current between the tube groups. For example, the first external balance transformer Coupling to the end of the first group of the first tube group and the second tube group, the second external balancing transformer is coupled to the end of the first group of the third and fourth tube groups, the third external balancing transformer Engaged to the end of the second group of the first tube group and the third tube group, the fourth external balancing transformer is coupled to the ends of the second group of the second tube group and the fourth tube group. In other applications '16 lamps are combined into 4 groups of 4 tubes each. Each tube group contains a set of 4 internal balancing transformers that are coupled to the closed

(S 15 1283424 8pif.doc 4-shaped tube of the zigzag configuration towel. 4 boat bundles to 4 tube sets in a closed zigzag configuration. Coupling σ summarizing the invention, some of the appearance of the invention Advantages and novelty have been described herein. It is to be understood that all of the above advantages may not be achieved in accordance with any particular embodiment of the present invention. Accordingly, the present invention may be achieved by the above-described advantages or advantages. Optimize to enter (four) not = its advantages.

The above and other objects, features, and advantages of the present invention will become more apparent and understood <RTIgt; [Embodiment] Although described herein with particular embodiments, other embodiments (including embodiments that do not provide all of the advantages and features of the invention) are obvious and understandable to those skilled in the art.

^ Embodiments include various cost, more reliable and efficient flat and transformer configurations. The various configurations of the various embodiments can be applied to any number of gas discharge tubes. Balanced transformer configuration techniques allow a small number (e. g., one) of power converters to supply electrical power to a plurality of parallel tubes. It has been difficult to drive multiple lamps conventionally due to the negative impedance of these lamp loads. The balancing technique disclosed herein can advantageously allow parallel lamps to "start" or illuminate more quickly and maintain a balanced 1 ± preferred current during operation. Embodiments are applicable to a wide range of negative impedance gas discharge lamps including, but not limited to, cold cathode fluorescent lamps (CCFLs), hot cathode fluorescent lamps, xenon lamps, and the like.

I283434sP, d0C A diagram of a lamp with _3 lamps and two two-way balance _ configured as a sub- or erroneous structure. Compared with the simple tree shape, the structure, the zigzag &amp; + early 卩 from the layer or as, 3, 4, 5, 6 etc. = two with ^, showing 4 lamps Zigzag knot _ — kind _ i official and Ν · 1 two-way balance (four) device matching example: understandable is a large number of a total of μ 4;:= lamp array, with the above Parallel technology disclosed

It can correspond to the sub-set gamma of the material W. It is more advantageous to use a current of one of the lamps in each of the balanced windings for each of the two-way regulators used in the zigzag. This makes it possible to use two essentially identical two-way balancing transformers in this configuration. When two intrinsic phase-two-way balance transformers are used, the size of the car can be reduced by the number of vehicles in the province, and the number of errors in the combination can be reduced. In contrast, in a hierarchical balanced transformer system, the current in the higher-level balance (four) is greater than the current carried in the balance transformer in the lower-level and thus the larger of the balanced winding The wire (lower wire gauge) carries additional current. The zigzag configuration allows multiple lamps to be lioned when in parallel with a smaller number of (e.g., -) inverters. This can advantageously save money and space, because the converter circuit typically has a much higher cost than the balanced transformer and has a larger space. Typically, the secondary winding of the transformer of an inverter drives the parallel lamps and associated balancing circuits. In order to clarify that the I28343^8pif.doc change=wheel drive is represented by the inverter 102 in each figure, various examples will be described later with respect to Figs. 2A, 2B, 2C, as shown in Fig. 1. In the zigzag configuration, the first lamp tube 104, the second p tube 1〇6 and the third lamp tube 108 are driven in parallel by the commutating H 102. The first two t type balance transformer 110 is electrically wired. To the first terminal of the inverter 1〇2, the second two-way balancing transformer 112 is electrically coupled to the second terminal of the inverter 102. The first two-way balance transformer ιι is electrically coupled to the first lamp 1 () 4 and the second lamp contact to balance the current in the two lamps. The second three-way balance transformer 112 is electrically coupled to the second end, the opposite end of the lamp 106 and the third tube 1 〇 8 and the current in the two tubes is balanced. Since the current flowing through the first bulb 1〇4 is balanced by the current flowing through the second bulb 1〇6, the current flowing through the second bulb 106 then flows through the third bulb Mg. The current in the current is balanced, and the current flowing through the three lamps 104, 1〇6, 108 can be well balanced. In one embodiment, capacitors 114' 116, 118 are in series with each of the lamps. The capacitors 114, 116, 118 are not opinal, which allows the direct current (DC) to flow through the tubes without increasing the life of the tubes. Capacitors 114, 116, 118 may be disposed in one of the ends of a tube in the current path and may also be disposed at an upstream (e.g., "configurable between a balance transformer and an inverter 102. In an example with CCFLs, the capacitors 114, 116, 118 are pre-wired to the CCFLs in the backlight module. A source of DC current can be, for example, I2834^8pifdoc • From the secondary side of the lamp (eg, ccfls) used to estimate the current (reducer circuit on the lamp. Each rectifier circuit is typically referenced to ground potential. Rectifier circuit The amount of current flowing through the tube can be fed back to the control wafer according to the control wafer. One person in this line can understand two pieces, for example, other capacitors, inductors, ferrous salt beads and two/ The second = object is also included in this embodiment. ', three-翌 1 type balance tamper In one embodiment, the two-way balance transformer has a first balanced winding on each part of the spool And a second balanced winding, and each balanced winding is commonly connected to an end to form a two-way balanced transformer. The electrical connection can be formed inside the transformer or external to the transformer (eg, on the printed circuit $). Each balanced winding should be connected to the correct polarity to balance the current flowing through the balanced winding in the lamp. It is understood that each balanced winding of the balancing transformer should have approximately the same number of In a case where there are N lamps and N-1, the number of windings per winding of the balancing transformer should be about φ in the embodiment with N lamps and N balancing transformers, The balance transformer should have the same number of windings to avoid circulating currents. In addition, it should be noted that multiple balancing transformers can be assembled in a single package. An embodiment of a one-way balancing transformer includes a safety winding. This safety, group suppression to - protection circuit (for example, reverse parallel diode). This safety winding and protection circuit can protect the two-way balance transformer so that there is no over-voltage condition, when two-way The balance transformer can't make the current level I2834^68pi.. (for example, when one of the lamps fails), the overvoltage will occur. The safety winding can also be combined with one with two separate balanced windings (it is not Balance transformers that are connected together to one end) are used together. The number of windings of the safety winding is less than the number of windings of the balanced winding, and the number of windings varies greatly depending on the desired winding ratio. In one embodiment, each balanced winding has approximately 250 windings and the safety winding has one or two windings. In one embodiment, the safety winding is an isolated winding and is also insulated from the balanced winding 'to make the Queen winding The induced voltage can be safely monitored during fault detection. In an example where one of the parallel lamps is turned on but the other is turned off, the reverse parallel diode clamps the safety winding. The voltage on it, thus clamping the voltage across the balanced winding. This often happens when parallel CCFLs are started. The voltage clamped can advantageously limit the maximum voltage across the balun to a safe level. To prevent damage to the balance transformer. In a balanced winding and safety winding winding ratio of about 25 〇: In the case of the work, the reverse parallel diode clamps the voltage of about 〇·9 volts (when the electric φ flow is large) And the voltage across a balanced winding is limited to approximately 225 volts. The control circuit can also sense the voltage on the safety winding and provide the correct measurement (for example, the current on the main winding side drops so that the remaining lamps do not overload), the failure indicates that the main winding side of the power supply Close and so on. Of course, when starting immediately, it is worth expecting that the parallel &amp; tubes will not start at the same time. In one embodiment, the control circuit is grouped in a predetermined period of time (e.g., about one-third to three seconds) at the time of starting 20

I2834?4P, d0C - Negligible imbalance. This period can be changed over a wide range. An embodiment of a two-way balun having individual balanced windings, safety windings and reverse parallel diodes will be described later in connection with FIG. In addition, the above-mentioned appearance and other features of the 'available two-way balun transformer are described in the Attorney of the U.S. Patent Application Serial No. 10/970,248, filed on Jan. 24, 2011. Docket: The name "§yStems And Methods For Fault Protection In A Balancing Transformer", published by MSEMI 133A, is hereby incorporated by reference. The converter configuration with a large change in the converter configuration can be used to provide power to the parallel lamps. For example, Figures 2A, 2B, 2C show examples of various converter configurations. It is known to those skilled in the art that the configuration of the converter that can be used is not limited to the above example. Figure 2A shows the floating configuration for the output of an inverter. The parallel combination of lamps can be electrically coupled to the first terminal 202 and the second terminal 2〇4 to receive power. The floating configuration advantageously allows for a lower peak voltage difference between a φ component on the secondary side (the lamp side) and a backlight (usually grounded) for the backlight module, thus allowing for a lower peak voltage difference The possibility of corona discharge is reduced. Converter transformer 210 couples power from primary winding 212 to secondary winding 214. Main winding 212 is electrically coupled to a switching network 216 that is controlled by controller 218. Typically, the switching network 216 and controller 218 are powered by a DC power source, and the switching network 216 is controlled by driving a signal from the controller 218, and the switching network 216 produces a type for commutation. The alternating current (AC) of the transformer 210. The switching network 216 21 I2834^8p, doc / can be formed by a very good circuit, for example, it can be (but not limited to) a full bridge type • a circuit of a 'half bridge circuit, a push-pull circuit, a Royer circuit Or other circuits. In one embodiment, the converter transformer 21 is more closely coupled by the primary winding 212 to the secondary winding 214, and the controller 218 regulates the current on the secondary side by monitoring the current on the primary winding side. (not the secondary side current) to achieve. This advantageously allows the secondary winding 214 to float to the ground point, as shown in the embodiment of the Figure. The embodiment shown in Figure 2A also includes one or more non-essential # (0Ptlonal) resistors 220, 222 having a higher resistance value that are grounded to discharge the electrostatic charge. Such a high resistance value does not change the floating nature of this circuit. The value that can be used for the resistor is 1 million ohms. This value is not a critical value and other values can be pre-determined by the person making it. Figure 2B is an example of a single-ended output of an inverter. A parallel lamp combination can be electrically coupled to the first terminal 232 and the second terminal 234 to receive power. In the illustrated embodiment, the first terminal 232 is grounded and the second terminal 234 is considered to be ''high, terminal. In another embodiment, the second terminal 234 φ is grounded and the first terminal 232 is a high terminal. Since the secondary side output is referenced to the location, the advantage of single-ended turns is that the secondary current can be easily monitored. The disadvantage is that "high, the spike voltage on the terminal is higher, which increases the risk of electrician discharge. Figure 2C shows an example of a double-ended output or balanced output of an inverter. The advantage of the state is that a lower peak voltage difference can be provided between a component on the secondary side and the ground point. A parallel lamp combination can be electrically coupled to the first terminal 242 and the second terminal 244 to receive work. 22 I2834248pif.d〇〇— rate. In the illustrated embodiment, two separate converter transformers 246, 248 are driven by switching networks 250, 252 and in a balanced manner, or, phase separation, The lamps are driven. In the configuration shown, the common contacts between the two converter transformers 246, 248 are grounded to provide a balanced drive. In another configuration, two converter transformers 246, 248 The "between the ground" causes the first terminal 242 and the second terminal 244 to float to the ground point. For example, please refer to the U.S. Patent Application No. filed on July 3, 2008. 10/903 636 is named "Split Phase # Inverters For the description of the For CCFL Backlight System, the entire contents of which are incorporated herein by reference. Other techniques are pre-determined by those familiar with the business. JA-N lamps and N-1 transformers Figure 3 shows the configuration of four gas discharge lamps and three two-way balance transformers arranged in a zigzag or staggered structure. The advantage of the zigzag structure is that each balanced winding of the two-way balance transformer It can carry approximately the same current. This advantageously allows the same two-way balancing transformer to be used throughout the φ configuration. In the embodiment shown in Figure 3, the fourth lamp 302, the third two-way balance Transformer 304 and optional capacitor 306 have been added to the embodiment described earlier in accordance with Figure 1. Unnecessary capacitor 306 prevents a DC current (DC) that reduces lifetime from flowing through fourth lamp 302. The three-way balance transformer 304 is electrically coupled to the first terminal of the inverter 1〇2 and electrically coupled to the third lamp tube 108 and the fourth lamp tube 302 to balance the two lamps. Current between the two. Because of the first tube 104 and Two lamps 23 I2834^68pifdoc • i〇6 is balanced by the first two-way balanced transformer _ no, the second produces 106 - and the first lamp officer 108 is balanced by the second two-way balancing transformer 112, The three-lamp (10) and the fourth tube are moved by the third two-way balance transformer C, and the current flowing through all four lamps can be favorably subjected to a good Figure 4 N gas discharge lamps and two The road balance transformer is configured to form a zigzag structure. As shown in Figures i, 3 and 4, when adding a two-lamp and a balance transformer, the balance transformer is added: = Lu W transformer lamp The opposite ends are configured in a zigzag configuration. As shown, the balancing transformers shown to the right of Figure 4 are each coupled to the first end of each pair of lamps and balance the electrical &amp; The balance transformers shown to the left of Figure 4 are each coupled in operation: to the second end of the other pair of lamps (which are different from the lamp balanced by the balance transformer shown on the right side of Figure 4). In the configuration in which there is overlap between the respective pairs of lamps of the balance transformers, a lamp is shared by different balance transformers, and a simpler two-way balance transformer can be used to achieve current balance. In fact, φ advantageously balances any number of lamps in a zigzag configuration, and more advantageously the same two-way balanced ink boundary can be used throughout the configuration. Figure 5 is a configuration with a zigzag structure with a selected: optional appearance. This embodiment corresponds to a zigzag structure having three gas discharge lamps. It is understandable that the principle of these non-essential appearances = advantages can be applied to configurations with any number of lamps. Each of the two-way balancing transformers 502, 504 shown in Figure 5 has respective balanced windings that are commonly connected to one end to form a two-way balancing transformer. In addition, each (§: 24 1283 injured 8pif.doc two-way balanced transformers 502, 504 have safety windings 506, 508 coupled to a pair of reverse parallel diodes 51, 512, respectively, to The balance phenomenon is used for protection. The safety windings 506, 508 can be coupled to a fault diagnosis circuit for monitoring. Non-essential inductors 514, 516 can also be used. Balanced by N lamps and N-1 two-way A disadvantage of the zigzag configuration formed by the transformer is that the number of windings in series with a lamp can be varied in this configuration. For example, in

In the three lamp system, the first lamp 104 and the third lamp 1〇8 have a balanced winding in series. In contrast, the second tube 1〇6 has two balanced windings connected in series. This causes a difference in the leakage inductance in series with a lamp and affects the current balance. In addition, in order to suppress electromagnetic interference (EMI), we are looking for an inductor (for example, the leakage inductance of the balance transformer) on both ends of a tube. In one embodiment, the non-essential inductors 514, 516 are used to balance the leakage inductance and compensate for "not set-balanced windings in series with the lamp". Each inductor can be used in the configuration described previously. The zigzag cobalt of the balance transformer _ Fig. 6_9 is a configuration in which a plurality of lamp tubes and N balance transformers are arranged in a zigzag shape, and a five-lamp lamp and a balance transformer are used. In a zigzag configuration with a lamp and N balance transformers, each of the two layers balances the currents of the overlapping pairs of lamps. The H-suppressor is the remnant of the dragon 1 'when the leakage inductance is obtained: -, ^, there is a tube and (4) balance transformer (four) zigzag structure - and the officer can advantageously balance with the same number of balance transformers Winding phase

(S 25 12834 orphans. This allows the leakage inductance in the balance transformer (which is added in series to each lamp) to achieve a balance in a lamp and a lamp. Figure 6 shows three lamps. Figures 7A and 7B show four lamps. Figure 8 shows N lamps, where N is an odd number. Figure 9A shows that n is an even number of n lamps. - For example, 6,8 As shown, when ^ is an odd number, the configuration is asymmetrical, and the number of balance transformers on each side of the lamp is not equal. Moreover, the balance winding of at least one balance transformer is not electrically connected. In addition, the number of the side of the variable pressure H is not connected to a balance, regardless of the above, the zigzag structure with N lamps and N balance transformers can be Effectively balancing the current and allowing the leakage inductance to be in series with the lamp. % Figure 6 shows the first lamp 6〇2, the second lamp 6〇4 and the third lamp 606. The first balancing transformer 6〇8, The second balance transformer 61A and the third balance transformer 612 balance the current flowing through the respective lamps 6〇2, 6〇4, 6〇6. The transformer 608 balances the current flowing through the first lamp 602 and the second lamp 604. The balanced winding of the first balancing transformer 608 remains in a disengaged state because a balanced winding is coupled to the inverter 1〇2 The first terminal, and the other balanced winding is coupled to the burn-in group of the third balance transformer 612. It should be noted that the balance windings are not commonly connected. In an embodiment, the first balance transformer 608 is also added A safety winding, which can be lighted/protected, a monitoring circuit or both. The &gt; counterbalance transformer 610 balances the current flowing through the second tube 6〇4 and the third tube 606. Balance winding of two balance transformer 610

(S 26 I283424Pif.d〇c is commonly connected to one end, making the second balance transformer a two-way balanced, f. Note that in addition to the above-mentioned common connection to the - end (which can be formed externally), The same variation can be used for all transformer configurations. In one embodiment, the second balancing transformer 610 further includes a queen winding and, alternatively, 逆pti〇nally includes a reverse parallel diode ' Protecting the second balance county 610 causes the imbalance described earlier in Figure 5 to not occur. The balance balance Mai 612 causes the motor flowing through the first tube 602 and the third tube 6〇6 to reach Balance. It should be noted that the third balance transformer (10) can be regarded as redundant when balancing the current. The balance windings of the third balance transformer 612 are also connected to the - end. Each - the lamp, the trick can be advantageously In the second, _ (four), each balance winding balances the leakage inductance in series with each of the lamps. In addition, the arrangement of the lamps can selectively include capacitors 622, 624, respectively, connected in series with the lamps. The direct current does not flow through the lamps.

As shown in '9, when #N is an even number, the configuration is symmetrical, and the mother-side of the lamp g has the same number of balancers. X, each flat, transformer H becomes a two-way balance transformer, and its balanced winding is electrically Ϊ:, Ϊ? to the end. When the number of sighs is sinused, it is more advantageous to have a balanced clock at the two ends of the mother = lamp camp, which contributes to the suppression of electromagnetic interference. Four lamps and four balance transformers are arranged in a zigzag structure. Each balance transformer can be balanced (4) 11 and each balanced winding is connected to the ί terminal when Ν is even. Each balanced winding can be wound from a single winding and connected internally

(S 27 128342^8pif.doc • 1_ wiring board, device or its _ externally connected to the transformer. 41 Figure 7A shows the first lamp 702, the second lamp 7〇4, the third lamp 7〇 6 and the fourth tube 708. As shown in Fig. 7A, the first balance transformers cry 712, flute, transformer, please, the third controller 2: 718 is configured into a zigzag, configuration. The transformer 712 balances the current flowing through the first lamp tube 702 and the second lamp tube 7〇4. The second balance transformer 714 causes the current flowing through the second lamp tube 7〇4 and the third lamp tube 7〇6 to reach # The second balance transformer 716 balances the current flowing through the third lamp 706 and the fourth lamp 708. Each of the transformers 712, 714, 7丨6 itself balances the current flowing through the four lamps, such as As previously described in Figure 3. An additional balancing transformer (here the fourth balancing transformer) 718 can balance the current of the 四il via the fourth lamp 708 and the first lamp 702. Again, the fourth balancing transformer 718 further balances the leakage inductances of the series of lamps 702, 704, 706. In addition, the fourth balance transformer 718 is at one end of the first lamp 702 and One end of the four lamps 7〇8 provides a leakage inductance, and its φ contributes to the suppression of electromagnetic interference. Further, the configuration of each of the lamps may selectively include capacitors 722, 724 connected in series with each of the lamps 702' 704, 706, 708. , 726 ' 728, so that DC current does not flow through the lamps. Figure 7B is another embodiment of a four-gas discharge lamp and four balance transformers arranged in a zigzag structure. The embodiment shown in Figures 7A' 7B is the same, and Figures 7A, 7B show that the layout is variable. The arrangement of the lamps in the configuration shown in Figure 7B allows the connection of the balance transformers to the respective tubes. The wires used are more even (or equal) (S) 28 I283424Pif.d〇c The other changes in the length can be determined in advance by the person in question. The system 2, the purchase tube and the balance of the zebras into the zigzag An example of a structure in which η* is also awkward and awkward. Figure 9 is an example of a lamp and N balances of 6 (four)^ pre-formed structures, where N is an even number. The system is equipped with a two-lamp and six balance transformers arranged in a zig-zag structure. In the formula, the embodiment shown in Fig. 9B is the same as Fig. 9A = Fig. 5, where N is 6. However, when viewed in the layout view, Fig. 9A, the layout is changeable. For example, When viewed in a layout view, the figure does not: the wires of the Τ &amp; example have a more uniform length than the wire of the embodiment shown in Figure 9. The child-shaped structure advantageously allows any number of lamps to be driven in parallel. The various zigzag structures of the nested Fuheng Cobalt as described above have been described with reference to the balance of currents between the plurality of lamps. The zigzag structure of class (4) balances the current between the wires. For example, each of the tubes referenced in the above figures may represent a group of tubes (or tube loads) comprising a plurality of tubes. Multiple lamps in a single lamp group can be coupled in a series configuration or a parallel configuration. In one embodiment, each of the lamp groups is configured in a nested balanced configuration, with a set of balancing transformers to balance the current between the individual tube groups, and with each of the other sets of balancing transformers in each of the tube groups The current of each tube is balanced. Figure 10 is an embodiment of a lamp tube group of a single lamp in a nested zig-zag gentleman structure of a closed zigzag structure, which enables each of the lamps in each of the lamps The current is balanced and a current balance is achieved between the individual lamp groups. In the embodiment shown in Figure 10, the 16 lamps constitute 4 29 :== 4 lamps. A group of 4 balance _ (or external = ^ zigzag configuration of the lamp group, so that 4 lights g, and _ electric ^ to achieve a balance. Each - lamp group «^11 (^ ^ ^ ^ ( The lamp in the integrated zigzag field in dediJd balances the current between the lamp holders in the same tube group. ιϊί: between the 4 tubes in the tube group and between the 4 tube groups The closed zigzag configuration used by Erda ΐΓί is basically similar to that of Figure 7. U U ® _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ In Fig. 10, not in the embodiment, for example, a non-essential capacitor may be connected in series with each tube or a group of tubes to block direct current. However, unnecessary capacitors are not shown in Fig. 10 to make the surface More clearly. Η In one embodiment, the external balance transformer and the internal balance transformer, the two-way balance transformer, the two balanced windings have a common output of two separate outputs. The internal balance transformer 11 can The external balance = the device is constructed in the same way, and the motor that can be guided by the external balance transformer is set to be internally The balance transformer can direct more current (i.e., higher front volts /;, L). The various external balancing transformers can advantageously be designed to be identical to each other and the individual internal balancing transformers can also advantageously be designed to be identical to each other. ★ In the embodiment shown in FIG. 1A, respective inputs of the first external balancing transformer 712 and the second, partial balancing transformer 716 are coupled to a first output of the inverter 忉 2. A third external balancing transformer 714 And the respective input of the fourth external balance transformer 718 is coupled to the second input 12834 of the inverter 102.

f. The wheel-out ends of the first-outer balance transformer 712 are respectively engaged to the first-group end of the first set of two lamps=groups (ie, the first tube group 704 and the second tube group 7〇2) - A balance is achieved between the tube group 7 () 4 and the second tube group view. The output ends of the second external balancing transformer 716 respectively perform the first group end of the second set of two lamp sets (i.e., the third tube group write and the fourth tube group 7〇8). The output ends of the third external balance transformer 714 are respectively lightly coupled to the second group end of the two sets of lamps (ie, the first lamp group 7〇4 and the third lamp I&quot;, and 706) 1 four external balance transformer; the output end of the 718 is respectively coupled to the second group of the second set of the second set of the two sets of lamps (ie, the fourth and fourth tube sets) to 702 - the first of the tube sets - The set and the third set - part is the stack of the -th tube group 704 shared with the two sets. The two of the two tube mosquitoes 'the second set and the third set are overlapped with the second set of the third tube 706. These "overlapping" parts use a two-balanced transformer to drive the four lamp groups 7G2, 7G4, write, and achieve current balance. The fourth external balance dragon 718 provides two lamps Others, the collection of partial (Pa Fu) overlaps. Additionally, the fourth external balance transformer 718 can cause the battery to form a preferred symmetry (e.g., balanced leakage inductance) with each end of the external balance transformer. As described above, each lamp tube group has four internal balance transformers, and one is engaged to the lamps of the lamp group of the closed zigzag configuration, so that the current between the lamps is balanced. The internal balance transformer is integrated into each lamp tube = a part of the bulb on one end. See first lamp set 704, first internal balance transformer, 1〇12(1) and second internal balance changer 31 I2834?4pif.d. 1016(1) has a plurality of inputs coupled to the first set of ends of the first tube set 704. The third internal balancing transformer 1014(1) and the fourth internal balancing transformer 1018(1) have a plurality of inputs coupled to the second set of ends of the first tube group 704. The respective outputs of the first internal balancing transformer 1012(1) are coupled to the first ends of the first tube 1004(1) and the second tube 1002(1), respectively. The respective output ends of the second inner balance transformer 1016(1) are coupled to the first ends of the third lamp tube 1006(1) and the fourth lamp tube 1〇〇8(1), respectively. The respective outputs of the third internal balanced transformed state 1014 (1) are respectively coupled to the second ends of the first tube (1) and the second tube 1006 (1). Finally, the respective outputs of the fourth internal balancing transformer 1018(1) are coupled to the second ends of the second lamp 1〇〇2 (丨) and the fourth lamp 笞1008(1), respectively. The internal balance transformer is similarly grounded to the individual lamps in the other lamp group, so that the current between the lamps of the same tube group is balanced. m You use another embodiment of a lamp tube set in a closed zigzag structure with a closed delta-shaped zigzag structure, which causes the current between the tube in each tube group Balance is achieved and an open zigzag structure is used to balance the current of the individual lamp groups. In the figure shown in Figure u, 20 health tubes form 5 tube groups, each group (10) tubes; each of the 2 ί has 4 internal balance transformers, which are combined to the closed irm to make the same The closed zigzag configuration of the current between the two is substantially similar to the closed zigzag configuration of Figure 10, and is therefore not discussed here. The balance of the 5-sided device 'coupling to the opening group' causes the current 32 1283 between the 5 tube groups to be injured 8pif.doc = flat. The open zigzag configuration shown in Figure 11 is basically similar to the configuration of the figure. Figure 4 contains non-essential capacitors that are not shown to be more clear in the figure. In the implementation shown in FIG. 11, the second external input is coupled to the first output of the respective inputs 110 and 102 of the fourth transformer balance transformer 1122. On the first external balance transformer: :::: each input of the dragon 304 is connected to the thunder of the exchange, and the end of the group is set to 'end the end of the 5 sets of tubes ^ίί !: 'The first external balance transformer 110 of the pipe group 1〇6) == lamp group (ie, the first lamp group 1 () 4 and the second lamp 112 output terminal VIII ^ second group end. 2. The external balance transformer and the third to the two tube groups (ie, the second tube group 106 is variable) the Li input; the end of the group. The third external flat tube, the 1. 8 and the fourth tube Group 3〇2); group (: end: three: (ie, the fourth tube group 3〇2 and the fifth tube ί group end. s, and U20) the fourth end of the fourth set is 31= A group of lamps shared by the two sets has an external balance transformer crying at the end of each group. Your mother, the ugly winter group end face is joined to the second outer face group, and the group is hidden at the end of the two slits. External balance transformer. (S] 33 I2834^8pif.d Figure 12 is another embodiment of N lamp sets using one of the nested zigzags of an open zigzag structure, each of which makes each The current between a ^ and the lamp in the group is flat And use the closed = two-shaped structure to balance the current between the two lamp groups. In the figure == embodiment, 20 lamps are combined into 4 tube groups, each tube tube group 5 two tubes A set of four external balance transformers are coupled to the four tube groups in the closed zigzag state to balance the current between the four tube groups. The closed zigzag configuration shown in Figure 12 is basically Similar to the closed zigzag configuration shown in Fig. ,, it will not be discussed here. In the embodiment shown in Fig. 12, each tube group has a set of 4 internal balance transformers. Combine the lamps of the lamp group in the open zigzag configuration to balance the current between the lamps. Please refer to the first lamp group 704, the first internal balance transformer 121〇(1) and the first Three internal balancing, respective inputs of the press 1214(1) are coupled to the second set of the ends of the first tube group j〇4. The second internal balancing transformer 1212(1) and the fourth internal balancing tuner The respective inputs of 1222(1) are lightly coupled to the first set of terminals of the first tube group 704. Internal balance transformers 1210(1), 1212(1), 1214(1), 1222(1 Coupling to the alternating ends of the partially overlapping pairs of lamps, balancing the current between the five tubes in the first tube group 7〇4. For example, the first internal level, transformer 1210(1) The output ends are respectively coupled to the second ends of the first and second tubes 1206(1). The outputs of the second internal balancing transformer 1212(1) are coupled to the second tubes 1206(1) and the third lamps, respectively. The first end of the tube ° ° 12 〇 8 (1). The wheel end of the third internal balance transformer 1214 (1) is coupled to the 34 I2834^8pi, doc, to the third tube 1208 (1) and the fourth tube The second end of 12〇2(i). Finally, the output end of the fourth internal balance transformer n 1222(1) is divided into the fourth end of the fourth 12G2 (1) and the fifth tube (1). The internal balancing transformers are similarly fitted to the individual tubes in the other tube groups to balance the current between the tubes of the same tube group. The nested zig-zag structure shown in Figures 10 through 12 is by way of example only and is not intended to be a limitation. For example, the number of tubes or groups of lamps can vary. In addition, the number of nested levels can be increased to more than two levels. Different combinations of open zigzag configuration and closed zigzag configuration can also be used to balance the current between the lamps of the same tube group or to balance the current between the plurality of tube groups. For example, a nested open zigzag configuration allows the current between the individual tube groups to be equal to each other and the current between the tubes in the same group. The gossip application can make the gate-shaped zigzag configuration and the closed-type zigzag form, so that other configurations can be combined in each-lamp group or in each tube TM configuration, so that the plurality of tube groups are balanced and Make the current between each tube in each tube group ===, you can also use the ring balance configuration, strip balance configuration, and it, like configuration to make multiple tubes or tubes In the second two-string and also Vfi-shaped balance configuration, the --balanced transformer is combined and used to guide a common electric strip-shaped balance in the _ road, each side _ close to the heavy pipe at 35 128343⁄4 - ·- or one end of the lamp group. In the tree-balanced configuration, the balance transformer of the first stage of the balance transformer, the first level of the balanced transformer in the equilibrium state, the current path is divided into two paths by a single road control, the second level of the balance transformer = The current path is divided into at least four balanced paths by two paths, and the balance transformer of the next level that may exist further increases the number of balanced current paths. Other details of the tree-balanced configuration are described in the U.S. Application Serial No. 10/970,243, entitled "System and Method for a Transformer Configuration with a Tree. Topology f〇r Current Balancing in Gas Discharge In Lamps 55, which is hereby incorporated by reference in its entirety in its entirety in its entirety in the the the the the the the the the the The current between the lamps in the tube group is balanced and a closed zigzag structure is used to balance the current between the tubes. In the embodiment shown in Figure n, 2 tubes are combined into 4 One tube group, each tube group has 5 tubes. A group of 4 external balance transformers are coupled to the 4 tube groups in the zigzag configuration φ to achieve the current between the 4 tube groups Balanced. The closed zigzag structure shown in Fig. 13 is substantially similar to the closed zigzag structure shown in Fig. 10. Therefore, it will not be discussed here. In the embodiment shown in Fig. 13, each tube group has one Group of 5 internal balance transformers, coupled The light bulb is connected to the tube group in the ring configuration: the current between the tubes is balanced. Please refer to the first tube group 7〇4, 5 tubes 1300(1), 1302(1) ), 1304(1) , 13〇6(1), 13〇8(1) have the first end commonly connected to the first group end of the first tube group 7〇4 36 i8pif.doc ·- The main winding of an internal balance transformer 1301(1) is coupled to the first lamp. The second end of the l30%1) and the second end of the second set of the first lamp set 704 are the second internal balancing transformer 1303(1) The main winding is coupled between the second end of the second lamp tube 1302(1) and the end of the second tube group. The main winding of the third internal balance duster 1305(1) is coupled to the third tube 13〇 Between the second end of 4(1) and the end of the second tube group. The main winding of the fourth internal balancing transformer 1307(1) is coupled to the second end of the fourth tube 13〇6(1) and the g-lamp group Finally, the main winding of the fifth internal balancing transformer 13〇9(ι) φ is coupled between the second end of the fifth lamp 1308(1) and the end of the second tube group. Internal balance transformer 1301(1), 13〇3(1) 13〇5(1), 1307(1), 1309(1)|Maynthesis series circuit. This series circuit allows a common current to circulate in the secondary winding and the current guided by the respective main winding is It is proportional to the common current. Therefore, each of the lamps 13 in the first tube group 704 can be made 13(1), 13〇2(1), 13〇4(1), 13〇6 (1 wide) The current between ^(1) is balanced. In one embodiment, the secondary winding _ turns the winding of a single turn. The ring balance configuration and the balance transformer used in the ring balance configuration are described in the U.S. Patent Application Serial No. 10/958,668, entitled "A Current Sharing μ.

Multiple CCF Lamp 〇peration, and U.S. Application No. 1 </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> <RTIgt; The current between the lamp holders in the other lamp groups shown in Figure n is balanced. For example, the second lamp group 7〇2 has 37 I2834^8pifdoc has a second group of 5 internal balance transformers 1301(2) , 1303(2), 1305(2), 1307(2), 1309(2), at the first set of ends of the second tube set 702 and the respective tubes 13 of the second tube set 702 ( 2), the first ends of 1302(2), 1304(2), 1306(2), 1308(2) are coupled into a ring balance configuration. The third tube group 706 has a third group of 5 internal balances. Transformers 1301(3), 1303(3), 1305(3), 1307(3), 1309(3), which are in the second group end of the third tube group 706 and the third tube group 7〇6 The second end of each of the lamps 1300 (3), 1302 (3), 1304 (3), 1306 (3), 1308 (3)

Coupling into a ring-balanced configuration. The fourth tube group 7〇8 has a fourth group of 5 internal balance transformers 13〇1(4), 13〇3(4), 13〇5(4), 13〇7(4), 1309(4) ' The first group of ends of the fourth tube group 708 and the tubes 13(4), 1302(4), 1304(4), 1306(4), 1308(4) of the fourth tube group 708 The first end is converted into a ring balance configuration. = The second function of the transformer is the filtering. The high harmonic and 咼 frequency noise of the basic drive frequency is suppressed by the combination of the leakage inductance of the balance transformer and the capacitance to the plasma base of the lamp. When the longer pipe has a balancing transformer at the end, the end of the balanced transformer is expected to be brighter due to the south frequency electrical surface. For example, if a long tube is used in the embodiment of Fig. 13, the tubes of the tube group 7〇4 and the third tube group 7〇6 are expected to be near the end of each ί 5 Brighter, the second lamp tube set 702 and the first = board = group 708 towel light tube near the second end of each tube pre-hearted 5 unevenness of the technique used to use a variety of lights Lu, one @未端 has a balanced configuration of balance class. Make uneven

(S 128342068 pif.doc Other techniques used for brightness reduction are to place the individual tubes in a display panel such that adjacent tubes have balancing transformers on alternate ends. For example, Figure 14 shows a different display panel. An embodiment of the staggered lamp of the lamp tube group, which can reduce the uneven brightness. The figure shows a possible arrangement of the lamps of Fig. 13. The lamps from the first tube group 7〇4 Tubes 1300(1), 1302(1), 1304(1), 1306(1), 1308(1) are associated with lamps 13(2), 1302(2), 1304(2) from the second tube group 702. ) ' 1306(2), 1308(7) are staggered, and the lamps 1300(3), 1302(3), 1304(3), 1306(3), 1308(3) from the third tube group 7〇6 are Each of the lamps 1300(4), 1302(4), 1304(4) '1306(4)' 1308(4) from the fourth tube group 708 are staggered. The adjacent tubes have balance transformers at alternate ends of the tubes. The various balance transformers and circuit connections are not shown in the drawings to make the drawings clearer. Various embodiments have been described above. The above embodiments are described with reference to specific embodiments. However, the descriptions of the present invention have been made by way of example and not by way of limitation. However, it is not intended to limit the invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS [A Brief Description of the Drawings] These drawings are intended to illustrate embodiments of the invention, which are not a limitation of the invention. Χ 39 12834 孤邮d〇c Figure 1 is a description of three gas discharge lamps 〇^ Diagram of the zig-zag structure. - Road balance transformer configuration Figure 2A is an example of a floating wheel of a converter. Figure 2B is a single-end wheeled converter. Example of a double-ended wheel for commutation Or balance wheeled - for example. Zigzag, 纟: structure discharge lamp and three two-way balance transformer configuration === electric lamp and N, two-way balance transformer with Figure 5 series with zigzag structure _ , The necessary (optional) view. ', , shape, 41: two 2 discharge lamps and three balance transformers are arranged in a zigzag tube to provide a nearly _ leakage inductance. Figure 7A is a four gas discharge wipe 4 ^ Graphical diagram of the glyph structure, which provides a kind of suppression for each lamp tube and additionally provides electromagnetic interference (EMI) suppression. 'Mesh 5, leakage inductance word band # 4 gas discharge lamps and 4 Qingheng class 11 is another embodiment in which the pre-shaped structure is configured. The wind moxibustion system is configured such that a gas balancer and a balance transformer are configured as ϊ==. It provides almost the same leakage inductance for each lamp tube, and a gas discharge lamp #σΝ一平__ is configured to provide almost the same leakage inductance and another k for electromagnetic interference (ΕΜΙ) suppression, wherein q even . 1283426 16668pif.doc Figure 9B is another embodiment of a N-shaped gas discharge lamp and n balance transformers arranged in a zigzag configuration, where N is 6. Figure 1 is an embodiment of N lamp sets of one of the lamps in a nested zigzag structure of a closed zigzag configuration, which causes current between the lamps in each of the tube groups A balance is reached and a current balance is achieved between the individual lamp groups.

Figure 11 is another embodiment of a lamp tube set of one of the lamps in a nested zigzag structure using a closed zigzag structure, which causes current between the lamps in each of the tube groups A balance is achieved and an open zigzag structure is used to balance the current between the individual lamp groups. Figure 12 is another embodiment of a lamp tube group of one of the plurality of lamps in a nested zigzag structure using an open zigzag structure, which causes current between the lamps in each of the tube groups A balance is reached and a closed: glyph structure is used to balance the current between the individual lamp groups. Figure 13 is an embodiment of one of the plurality of lamps in a nested zigzag configuration using a ring-balanced configuration, which balances the current between the % of the lamps in each tube group And use a closed zigzag to balance the current between the individual lamp groups. Figure 14 is an illustration of an interlaced and different embodiment of panels from different groups of lamps that can reduce uneven brightness. And Lu [Main component symbol description] 102 104, 106, 108 110, 112 Inverter Lamp Two-way balance transformer 12834^^8pif.doc

114, 116, 118 202, 204 210 212 214 216 218 220 , 222 232 , 234 242 , 244 246 , 248 250 , 252 302 304 306 502 , 504 506 , 508 510 , 512 514 , 516 602 , 604 , 606 608 , 610, 612 622, 624, 626 702, 704, 706 708 Capacitor terminal converter transformer main winding secondary winding switching network controller resistance terminal terminal converter transformer switching network lamp two-way balance transformer capacitor two-way balance Transformer safety winding reverse parallel diode inductor lamp balance transformer capacitor lamp tube 42 I2834^8Pif.d〇c

712, 714, 716 718 722, 724, 726 728 1002, 1004 1006, 1008 1012, 1014 1016, 1018 110, 112 304, 1122 1120 1200 1202, 1204 1206, 1208 1210, 1212 1214 &gt; 1222 Balance transformer balance transformer capacitor Capacitor lamp tube internal balance transformer internal balance transformer external balance transformer external balance transformer lamp group lamp tube lamp tube internal balance transformer internal balance transformer 8 43

Claims (1)

If.doc • X. Patent application scope: • k A combination of lamps, including: N lamps in parallel configuration, where N is at least 3; and N-1 balance transformers, each with two transformers Balanced windings, each in series with a pair of lamps during operation to balance the currents of the N lamps, the first ends of the first pair of N lamps being coupled to N-1 balancing transformers during operation First, the second end of the second pair of n lamps is coupled to the second of the N-1 balance transformers during operation, wherein one of the lamps is shared by the first pair and the second pair, and The second end is opposite to the first end. 2. The lamp assembly of claim 1, wherein the balance transformers are substantially identical to each other. -3. The lamp assembly of claim 1, wherein each of the lamps comprises cold cathode fluorescent lamps (CCFLs). 4. The lamp assembly of claim 1, further comprising a capacitor in series with each of the lamps. The lamp assembly of claim 1, wherein the at least one balance transformer further comprises a safety winding coupled to a protection circuit. 6. The lamp assembly of claim 1, wherein the N lamps are part of a larger combination of more than N lamps. 7. The lamp assembly of claim 1, further comprising: a first terminal and a second terminal for receiving power from the inverter; 128342^pif.d〇c is coupled to the first end of the first end of the balance transformer of the lamp and a lamp that is not coupled to the first part of the balance transformer to be coupled to a first terminal of the inverter; and a second-side balance transformer coupled to the second end of the lamp tube to the second terminal of the inverter. The invention relates to the lamp assembly of claim 7, wherein the first coupling and the second terminal are substantially floating and are not in operation with the grounding point 9|·as described in claim 8 a lamp combination in which a resistor is further charged to a ground point, and has a high resistance value to cause the static electricity to be discharged to the lamp assembly as described in claim 7 of the patent application, wherein the first &lt; The second terminal is a double-ended output. The lamp assembly of the seventh aspect of the invention, wherein the first and second terminals are single-ended outputs. 12. The lamp tube assembly of claim 1, wherein the Nth balance transformer is not included in the n_i balance transformer, and the n balance transformers are operated in phase with the Nth pair of lamps. In series, wherein = one Nth pair of lamps is only connected in series with one of the N-1 balance transformers during operation. 13. The lamp assembly of claim 12, wherein the Nth balance transformer causes each of the lamps to be in series with the same number of balanced windings. M. The lamp assembly of claim 12, wherein N 45 I28342^8pif&gt;doc is an even number and the balanced winding of the nth balance transformer is connected in common to a terminal. 15. A lamp assembly comprising: N lamps, wherein N is at least 3; and N-1 balance transformers to balance the currents of the n lamps, wherein the N_1 balance transformers are respectively coupled to each other during operation Nq pairs the overlapping tubes so that one tube is shared by two of the N-1 balance transformers, and the two balance transformers are coupled to the common at the opposite ends of the common tube when operating Lamp. 16. The lamp tube assembly of claim 15, wherein the second N-balance transformer is further comprised of N&gt; 4 flat transformers, and the Nth balance transformer is operated with N One of the lamps is connected in series with the lamp, wherein the pair of lamps are only coupled to one of the transformers in operation. The lamp assembly of claim 16, wherein the balance windings of the Nth balance transformer are connected together at one end. 18· A method for parallel connection of a gas discharge lamp, comprising: providing N lamps, wherein N is at least 3; and balancing a current between the n lamps by using a group of N-1 balance transformers, Each of the balance transformers makes the current between the lamps flat, and the N lamps form a pair of overlapping but not identical lamps, and each pair of lamps has at least one face-to-face to two different balance transformers. a common lamp; and coupling the N-1 balance transformers to the lamp terminal in a parental configuration, 46 I2834^668Pif.d〇c to make the operation lighter to a different balance of the common lamp To the terminal facing the common lamp. ~ The method of claim 19, as described in claim 18, wherein the method further comprises the use of a plurality of substantially identical balances and parallel use. 20. The gas bud reader of claim 18; . The method further includes using a plurality of cold cathode fluorescent lamps. . Parallel use of lamps 21 · As described in the scope of claim 18 The method further comprises a plurality of gas discharge 1 capacitors as described in claim 18, in combination with a plurality of lamps in operation. The method further comprises the step of combining the Nth balance transformer and the group formed by the 平衡·1 balance transformer during operation. (:, not in the third Ν 无 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯 灯The configuration of the transformer for balance, including the electric lamp between the two, wherein at least 3; and the agricultural set gossip-1 balance dweller for balancing the current between the lamps, In operation, in an alternating number of lamps, N-丨 pairs of overlapping lamps. Coupling to production 24. As described in claim 23, a plurality of parallel-driven gas discharge lamp loads are provided. The current is balanced to the configuration of the transformer, which further includes coupling the first balance transformer (which is not a group of Ν_balance transformers) to one of the N lamps, n lamps Each lamp of the official is only coupled to one of the balance transformers. 25·-Multiple lamp combinations, including · N lamp sets, where N is at least 3 and each The lamp group contains at least one configuration-light combination (its light combination at the end of the two groups) And at least N-1 external balancing transformers, each external balancing transformer comprising two balancing windings that are coupled to two different tube groups to balance the current between the two different tube groups And an external balance transformer is assigned to each of the N-1 sets of overlapping portions of the zigzag portions by the two tube groups, so that each tube is combined to at least the outer transformer and at least N-2 tubes The end of each group of the group is combined with the transformer. Μ T 26. As in the multiple lamp tube described in claim 25, the center further includes an external-balance transformer, which is lightly coupled to the tube ςς ^, so that Then, the end of each group of the solid lamp tube group is closed to - "Ping II 27. As the multiple lamp tube electric person described in claim 25, the vertical lamp tube group further includes one or more internal balance transformers ^ The pots are grouped to balance the current in the same tube group. [8:28] As shown in the 27th item of the patent application, the tubes of the same tube group are coupled to at least the group of the Μ广官, The internal balance transformer that exists. The sub-group of the solid 29. As claimed in the patent scope More than one—one of the lamps of the same lamp group is coupled to a lamp tube combination, and the 48 I283424pif.d〇〇 individual internal balance transformers of the elongated balance configuration make each lamp The tubes are connected in series with the main windings of different internal balancing transformers, and the secondary winding faces of the μ internal balancing transformers are combined into a series circuit (1〇〇Ρ). 30·Multiple as described in claim 25 of the patent scope The lamp combination, wherein N is 5, each of the 5 lamp groups includes 4 fluorescent lamps and 4 = partial balance transformer H, and 4 side balance transformation pressure _ to the zigzag group sorrow ^ The lamp group 'transfers to the end of the first group of the first lamp group t of the first lamp group t by the first external balance transformer, and the second external balance transformer turns = the second lamp group and the third tube group At the end of the second group, the device is lightly coupled to the end of the third group of the third tube group and the fourth tube group 2 - Γ * ΐ balance pressure reading to the fourth tube group and the fifth tube group a group of Wo. Cloth 3:., the multi-lamp combination described in item 25 of the patent scope, issued a balance: ΓΓ: Τ 变压器 transformer makes the 4th tube ί of the balance transformer face to the first - tube group and The lamp group and the first transformer are combined to the third end. In the second group of the first lamp group and the fourth group of the fourth lamp group, each of the multiple lamp assemblies described in item 31 of the range, the lamp, and the four lamps and 4 The internal balance of the 'state', the heart-shaped zigzag lamp and the second tube - the internal balance transformer to the first -, ,,; 螭, the second internal balance transformer is coupled to 49 I2834^8pif. D〇c second terminal of the second lamp and the fourth lamp, the third internal balance transformer is coupled to the first terminal of the fourth lamp and the third lamp, and the fourth internal balance transformer is coupled to the third terminal a second terminal of the tube and the first tube. 33. The multiple lamp assembly of claim 31, wherein each of the lamp sets comprises 5 lamps and 4 internal balance transformers configured in an open zigzag configuration to the first internal balance transformer And coupled to the first terminal of the first lamp and the second lamp, the second internal balance transformer is coupled to the second terminal of the second lamp and the third lamp, and the third internal balance transformer is coupled to the third lamp and A first terminal of the fourth tube, and a fourth internal balance transformer is coupled to the second terminal of the fourth lamp and the fifth lamp. 34. The multiple lamp assembly of claim 31, wherein each of the lamp sets comprises 5 lamps, which are lightly coupled to an internal balance transformer of a ring balance configuration, and the respective lamps are A lamp terminal is commonly connected, the second lamp terminals are respectively connected in series with the main windings of the respective internal balancing transformers, and the secondary windings of the internal balancing transformer are coupled into a series loop (°). A method for balancing current between a plurality of sets of lamps, comprising: grouping a plurality of tubes into N tube groups, wherein each tube group comprises at least two configurations in a tube assembly (which is coupled in a lamp tube between the ends of the two groups, and a light assembly of N-1 external balance transformers to a set of N-1 partial overlaps formed by a zigzag configuration of the two tube groups, such that N The current between the lamp sets is balanced, wherein each external balance transformer comprises two flat 50 128342^8 Pif.d〇c balance windings to fit into two different lamp sets, each of which is coupled to At least one external balance transformer and at least N-2 of each of the tube groups Both are coupled to two different external balancing transformers at the end of the facing group. 36. A method for balancing current between sets of lamps as described in claim 35, further comprising using one or more internal balance transformers to cause between the tubes of the same tube group The current is balanced. 37. A method for balancing electric μ between sets of lamps as described in claim 35, wherein each tube group comprises M lamps coupled to at least a zigzag configuration - 1 internal balance transformer. The method of balancing the currents between the plurality of sets of lamps as described in claim 37 of the claim, wherein the external balance transformers are substantially identical to each other and the internal balance transformers are substantially identical to each other. ☆, 39 · As described in the 35th application of the patent scope, the method for balancing the electric power between the plurality of sets of lamps, which further comprises the configuration of a ring balance configuration = an internal 4 balance transformer || Each of the lamps is balanced - the lamp sets are balanced. The secondary windings of each internal balance transformer are coupled into a closed loop in series and the main windings are individually connected in series with each of the lamps. For example, in the method of claim 39, the method for making the electric== balance between the plurality of sets of lamps, wherein the method further comprises: interlacing the words of the two non-two groups in the display panel, so that the lamp of the woman is in the lamp. The tube faces each other with a separate internal balance transformer. 41. A multiple lamp combination comprising: 51 I8pif.doc lamp; and means for balancing current between the N lamp sets, the N-1 balance transformers being coupled at the end of the alternating group A collection of N-1 partial overlaps formed by two tube groups. 42. The multiple lamp assembly of claim 41, wherein each tube group comprises one or more internal balance transformers that are grouped to cause current between the tubes in the same tube group Achieve a balance. 43. The multiple lamp assembly of claim 41, wherein each of the tube groups comprises a plurality of tubes and at least M-1 internal balance transformers configured to be configured. 44. The multiple lamp assembly of claim 41, wherein each of the lamps is a cold cathode fluorescent lamp for use as a backlight for a liquid crystal display. (§ 52