CN103702501B - A kind of adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit - Google Patents
A kind of adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit Download PDFInfo
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- CN103702501B CN103702501B CN201410000481.6A CN201410000481A CN103702501B CN 103702501 B CN103702501 B CN 103702501B CN 201410000481 A CN201410000481 A CN 201410000481A CN 103702501 B CN103702501 B CN 103702501B
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Abstract
A kind of adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit, comprise: the first cathode fluorescent tube, second cathode fluorescent tube CCFL-2, first step-up transformer T1, second step-up transformer T2, first cathode fluorescent tube CCFL-1, second cathode fluorescent tube CCFL-2 side by side parallel is placed and is formed double joint cathode fluorescent tube, first step-up transformer T1, second step-up transformer T2 is placed in the two ends of described double joint cathode fluorescent tube respectively, the primary side of the first step-up transformer T1 connects the primary side of the second step-up transformer T2 by holding wire, the secondary side of the first step-up transformer T1, the secondary side of the second step-up transformer T2 is connected to double joint cathode fluorescent tube two ends respectively by high-voltage line.The present invention can reduce, because single high drive cathode fluorescent tube is being in the mercury shift phenomenon caused under cryogenic conditions for a long time, can extend the life-span of cathode fluorescent tube.
Description
Technical field
The present invention is a kind of adopt double joint cathode fluorescent tube drive connecting circuit from ballast formula, relate to cathode fluorescent tube and drive field.
Background technology
From ballast formula cathode fluorescent tube CCFL as a kind of novel energy-saving lighting lamp.Because of the long-life property that it has, and very easily alternative traditional T8/T10 hot-cathode fluorescent lamp is installed.In about 600mm length in ballast formula fluorescent lamp, according to two U-shaped cathode fluorescent tubes, because it can produce half-light phenomenon at intermediate node place, unsightly; According to two I type straight tubes, the problem of half-light can be solved.But according to single high drive cathode fluorescent tube, there is following drawback: 1): be under cold environmental conditions for a long time, likely can produce the phenomenon of inner mercury skew, cause one end of cathode fluorescent tube to have redness phenomenon.2), because the length of the I type cold-cathode fluorescent straight tube of employing is at 1200mm, even longer.Adopt single high drive mode, the electric current that high-pressure side flows through is higher than low-pressure end, and after fluorescent tube length is partially long, the electric current of high-pressure side will higher than the electric current of low-pressure end, and consequent result is exactly half-light, and the brightness of high-pressure side is apparently higher than low-pressure end.
For these reasons, unique settling mode adopts two high drive exactly, can ensure: under cryogenic mercury shift phenomenon does not occur; Half-light phenomenon can not be produced; The problem that the electrode life because adopting single high pressure to cause is short can be avoided.
Summary of the invention
The invention provides a kind of adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit, cathode fluorescent tube is driven in two high pressure mode, can reduce because single high drive cathode fluorescent tube is being in the mercury shift phenomenon caused under cryogenic conditions for a long time, the life-span of cathode fluorescent tube can be extended simultaneously.
The technical scheme that the present invention takes is: a kind of adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit, comprise: the first cathode fluorescent tube, second cathode fluorescent tube CCFL-2, first step-up transformer T1, second step-up transformer T2, first cathode fluorescent tube CCFL-1, second cathode fluorescent tube CCFL-2 side by side parallel is placed and is formed double joint cathode fluorescent tube, first step-up transformer T1, second step-up transformer T2 is placed in the two ends of described double joint cathode fluorescent tube respectively, the primary side of the first step-up transformer T1 connects the primary side of the second step-up transformer T2 by holding wire, the secondary side of the first step-up transformer T1, the secondary side of the second step-up transformer T2 is connected to double joint cathode fluorescent tube two ends respectively by high-voltage line.
The primary side of described first step-up transformer T1 is in parallel with the primary side of the second step-up transformer T2 or connect.
The primary side of described first step-up transformer T1, the second step-up transformer T2 separates with secondary side, and primary side is single groove structure, and secondary side is multi-groove structure, and described primary side is provided with multiple pin.
Described first step-up transformer T1, the second step-up transformer T2: primary side comprises 1 ~ 7# pin, secondary side comprises 8#, 9# pin, the 2# pin of primary side, 6# pin are respectively as the initiating terminal of first side winding coiling and loop line end, and the 8# pin of secondary side, 9# pin are respectively as initiating terminal and loop line end.
A kind of adopt double joint cathode fluorescent tube from ballast formula drive method of attachment, the 2# pin of the first step-up transformer T1 primary side is as initiating terminal, in access CCFL drive circuit, the 6# pin of the first step-up transformer T1 primary side is as loop line end, the initiating terminal 2# pin of the primary side of the second step-up transformer T2 is connected to by holding wire, the 6# pin of the second step-up transformer T2 primary side, as loop line end, is returned by holding wire and is connected in CCFL drive circuit, forms loop.
The present invention is a kind of adopt double joint cathode fluorescent tube drive connecting circuit from ballast formula, technique effect is as follows:
1, two high drive cathode fluorescent tube, can reduce because single high drive cathode fluorescent tube is being under cryogenic conditions for a long time, the mercury shift phenomenon caused, can extend the life-span of cathode fluorescent tube.
2, the half-light phenomenon because adopting single high pressure to produce can be reduced.
3, the life-span because of the electrode of cold-cathode fluorescence lamp adopting single high drive to cause can be extended.
4, two high drive, can reduce the length of high-voltage line 3, reduce electromagnetic interference with this.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is step-up transformer primary side of the present invention series connection (homophase) connection layout;
Fig. 2 is step-up transformer primary side of the present invention series connection (anti-phase) connection layout;
Fig. 3 is step-up transformer primary side of the present invention parallel connection (homophase) connection layout;
Fig. 4 is step-up transformer primary side of the present invention parallel connection (anti-phase) connection layout.
Fig. 5 is the structural representation of step-up transformer of the present invention.
Fig. 6 is the electrical characteristic schematic diagram of step-up transformer of the present invention.
Fig. 7 is step-up transformer of the present invention primary side/secondary side current loop graph of a relation.
Fig. 8 is step-up transformer primary side voltage/current loop graph of a relation of the present invention.
Fig. 9 is step-up transformer of the present invention primary side/secondary side current graph of a relation.
Embodiment
A kind of adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit, comprise: the first cathode fluorescent tube CCFL-1, second cathode fluorescent tube CCFL-2, first step-up transformer T1, second step-up transformer T2, first cathode fluorescent tube CCFL-1, second cathode fluorescent tube CCFL-2 side by side parallel is placed and is formed double joint cathode fluorescent tube, first step-up transformer T1, second step-up transformer T2 is placed in the two ends of described double joint cathode fluorescent tube respectively, the primary side of the first step-up transformer T1 connects the primary side of the second step-up transformer T2 by holding wire 4, the secondary side of the first step-up transformer T1, the secondary side of the second step-up transformer T2 is connected to double joint cathode fluorescent tube two ends respectively by high-voltage line 3.
The primary side of described first step-up transformer T1 is in parallel with the primary side of the second step-up transformer T2 or connect.
What adopt double joint cathode fluorescent tube drives a method of attachment from ballast formula, the secondary side 8# pin of the first step-up transformer T1,9# pin, connects high-voltage line 3 respectively, is connected by the electrode of high-voltage line 3 with double joint cathode fluorescent tube.8# pin, the 9# pin of the second step-up transformer T2 secondary side, respectively by high-voltage line 3 and double joint cathode fluorescent tube electrode be connected.As shown in Figure 1 and Figure 2.With entering with going out, (namely the loop line end 9# pin of the first step-up transformer T1, is connected to the initiating terminal of step-up transformer second step-up transformer T2: 8# pin in the phase place employing of the primary side of the second step-up transformer T2.Same with the phase place of the secondary side of this corresponding step-up transformer, adopt with entering with going out principle: namely initiating terminal 8 pin of the secondary side of the first step-up transformer T1 connects the A end of cathode fluorescent tube CCFL-1, the loop line end of the secondary side of the B termination second step-up transformer T2 of cathode fluorescent tube CCFL-1: 9# pin, second step-up transformer T2 secondary side initiating terminal: 8# pin, connect the B end of cathode fluorescent tube CCFL-2, the 9# pin of the A termination first step-up transformer T1 of cathode fluorescent tube CCFL-2, according to the law of electromagnetic induction, form loop with this.
Embodiment 1:
First step-up transformer T1, the second step-up transformer T2, parameter and manufacture craft are consistent.The primary side of described first step-up transformer T1, the second step-up transformer T2 separates with secondary side, and primary side is single groove structure, and secondary side is multi-groove structure, and described primary side is provided with multiple pin.Described first step-up transformer T1, the second step-up transformer T2: primary side comprises 1 ~ 7# pin, secondary side comprises 8#, 9# pin, the present invention in order to PCB layout convenient, the 2# pin of primary side, 6# pin are respectively as the initiating terminal of first side winding coiling and loop line end.In order to wire winding is convenient, the 8# pin of secondary side, 9# pin are respectively as initiating terminal and loop line end.High-voltage line 3 adopts has silica gel wire rod, and concrete specification is UL3239.Holding wire 4 adopts the wire rod being not less than 24AWG specification.In Fig. 6, Means same phase represents the phase relation of primary side and secondary side, and Means start pin represents primary side and secondary side coiling initiating terminal.
First step-up transformer T1, the second step-up transformer T2 are placed in the two ends of double joint cathode fluorescent tube respectively.The primary side of the first step-up transformer T1: 2# pin, i.e. H point, access half-bridge mid point (considering EMC correlative factor), the 2# pin of the first step-up transformer T1 primary side is connected to the 2# pin place of the second step-up transformer T2 by holding wire 4.The 6# pin of the second step-up transformer T2 in CCFL drive circuit, forms loop with CCFL drive circuit by holding wire 4 tieback.The secondary side of the first step-up transformer T1 and 8#, 9# pin, be connected with the first cathode fluorescent tube CCFL-1, the second cathode fluorescent tube CCFL-2 by high-voltage line 3, the secondary side of same second step-up transformer T2 and 8#, 9# pin, be connected with the first cathode fluorescent tube CCFL-1, the second cathode fluorescent tube CCFL-2 by high-voltage line 3, as shown in Figure 3.
Embodiment 2:
As Fig. 3, shown in Fig. 4 and Fig. 7 ~ 9, first step-up transformer T1, the 2# of the second step-up transformer T2, 6# pin is as input signal end, input signal (square-wave voltage) is through the primary side of described step-up transformer, due to the first step-up transformer T1, second step-up transformer T2 belongs to magnetic elements, input square-wave voltage is in positive square-wave cycle, the input current I(2# produced, 6# pin) (that is: Ip) can not suddenly change, electric current slowly rises, the leakage inductance amount storage power of the Lkp of step-up transformer T/T2 primary side, first step-up transformer T1, second step-up transformer T2 magnetic core is magnetized, within the losing side period of wave of input square-wave voltage, first step-up transformer T1, the energy of the storage of the second step-up transformer T2 primary side is released, electric current I p declines, form alternating current, as shown in Figure 8.According to Faraday's electromagnetic induction law, alternating current produces alternating magnetic field, because the first step-up transformer T1, the second step-up transformer T2 primary side and secondary side adopt same magnetic core, so, the magnetic field of alternation can produce alternating voltage at the secondary side of the first step-up transformer T1, the second step-up transformer T2, the turn ratio of the first step-up transformer T1, the alternating voltage of the second step-up transformer T2 secondary side generation and the input voltage of primary side: the ratio of secondary side coiling and primary side coiling is proportional.Alternating voltage produces alternating current after forming loop, as shown in Figure 9.As shown in Figure 7, the 2# pin of the first step-up transformer T1, the second step-up transformer T2 is as the input of input current Ip, and 6# pin is as the loop line end of input current Ip.First step-up transformer T1, the 8# pin of the second step-up transformer T2 is as the first step-up transformer T1, the input of the current signal Is of the second step-up transformer T2 secondary side, first step-up transformer T1, the 9# pin of the second step-up transformer T2 is as the first step-up transformer T1, the output of the current signal Is of the second step-up transformer T2 secondary side, the input 8# pin correspondence of the secondary side current signal Is of the first step-up transformer T1 connects the output 9# pin of the secondary side current signal Is of the second step-up transformer T2, the output 9# pin correspondence of the secondary side current signal Is of the first step-up transformer T1 connects the input 8# pin of the secondary side current signal Is of the second step-up transformer T2, pass through CCFL-1/CCFL-2, at the first step-up transformer T1, the secondary side of the second step-up transformer T2 forms current circuit.Step-up transformer provides operating voltage on the one hand CCFL-1, CCFL-2 fluorescent tube, stablizes the operating current required for CCFL-1, CCFL-2 work on the other hand.
Claims (2)
1. one kind adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit, comprise: the first cathode fluorescent tube (CCFL-1), second cathode fluorescent tube (CCFL-2), first step-up transformer (T1), second step-up transformer (T2), first cathode fluorescent tube (CCFL-1), second cathode fluorescent tube (CCFL-2) side by side parallel is placed and is formed double joint cathode fluorescent tube, it is characterized in that, first step-up transformer (T1), second step-up transformer (T2) is placed in the two ends of described double joint cathode fluorescent tube respectively, the primary side of the first step-up transformer (T1) connects the primary side of the second step-up transformer (T2) by holding wire (4), the secondary side of the first step-up transformer (T1), the secondary side of the second step-up transformer (T2) is connected to double joint cathode fluorescent tube two ends respectively by high-voltage line (3), the primary side of described first step-up transformer (T1) is in parallel with the primary side of the second step-up transformer (T2) or connect, the primary side of described first step-up transformer (T1), the second step-up transformer (T2) separates with secondary side, and primary side is single groove structure, and secondary side is multi-groove structure, and described primary side is provided with multiple pin, described first step-up transformer (T1), the second step-up transformer (T2): primary side comprises 1 ~ 7# pin, secondary side comprises 8#, 9# pin, the 2# pin of primary side, 6# pin are respectively as the initiating terminal of first side winding coiling and loop line end, and the 8# pin of secondary side, 9# pin are respectively as initiating terminal and loop line end.
2. adopt the cathode fluorescent tube driving method driving connecting circuit as claimed in claim 1 from ballast formula, it is characterized in that, first step-up transformer (T1), the pin of the second step-up transformer (T2) is as input signal end input square-wave voltage, square-wave voltage is through the primary side of described step-up transformer, due to the first step-up transformer (T1), second step-up transformer (T2) belongs to magnetic elements, input square-wave voltage is in positive square-wave cycle, the input current Ip produced can not suddenly change, electric current slowly rises, first step-up transformer (T1), leakage inductance amount (Lkp) storage power of the second step-up transformer (T2) primary side, first step-up transformer (T1), second step-up transformer (T2) magnetic core is magnetized, within the losing side period of wave of input square-wave voltage, first step-up transformer (T1), the energy of the storage of the second step-up transformer (T2) primary side is released, electric current I p declines, form alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410000481.6A CN103702501B (en) | 2014-01-02 | 2014-01-02 | A kind of adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410000481.6A CN103702501B (en) | 2014-01-02 | 2014-01-02 | A kind of adopt double joint cathode fluorescent tube from ballast formula drive connecting circuit |
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| Publication Number | Publication Date |
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| CN103702501A CN103702501A (en) | 2014-04-02 |
| CN103702501B true CN103702501B (en) | 2015-09-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638594A (en) * | 2003-11-10 | 2005-07-13 | 河野和夫 | Drive circuit for lighting unit |
| CN1668161A (en) * | 2004-10-01 | 2005-09-14 | 友达光电股份有限公司 | Double high-voltage driving circuit device for lighting |
| CN101013560A (en) * | 2006-02-05 | 2007-08-08 | 启耀光电股份有限公司 | Driving device for asymmetric backlight module |
| CN203632951U (en) * | 2014-01-02 | 2014-06-04 | 宜昌劲森光电科技股份有限公司 | Self-ballast-type driving connection circuit employing double cold cathode fluorescence lamp tube |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7250731B2 (en) * | 2004-04-07 | 2007-07-31 | Microsemi Corporation | Primary side current balancing scheme for multiple CCF lamp operation |
| US7230390B2 (en) * | 2005-08-05 | 2007-06-12 | Top Victory Electronics (Taiwan) Co., Ltd. | Cold cathode fluorescent lamp assembly |
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2014
- 2014-01-02 CN CN201410000481.6A patent/CN103702501B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638594A (en) * | 2003-11-10 | 2005-07-13 | 河野和夫 | Drive circuit for lighting unit |
| CN1668161A (en) * | 2004-10-01 | 2005-09-14 | 友达光电股份有限公司 | Double high-voltage driving circuit device for lighting |
| CN101013560A (en) * | 2006-02-05 | 2007-08-08 | 启耀光电股份有限公司 | Driving device for asymmetric backlight module |
| CN203632951U (en) * | 2014-01-02 | 2014-06-04 | 宜昌劲森光电科技股份有限公司 | Self-ballast-type driving connection circuit employing double cold cathode fluorescence lamp tube |
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| CN103702501A (en) | 2014-04-02 |
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Effective date of registration: 20151028 Address after: Yichang City, Hubei province 443000 Poplar Road Wujiagang District No. 16 Patentee after: Yichang Justsun Optoelectronic Technology Co., Ltd. Address before: Yichang City, Hubei province 443000 Poplar Road Wujiagang District No. 16 Patentee before: Yichang Justsun Optoelectronic Technology Co., Ltd. Patentee before: Li Chao |
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Granted publication date: 20150923 Termination date: 20180102 |