CN103747583A - LED (light emitting diode) lamp tube compatible with electronic ballast of preheat current - Google Patents
LED (light emitting diode) lamp tube compatible with electronic ballast of preheat current Download PDFInfo
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- CN103747583A CN103747583A CN201310756126.7A CN201310756126A CN103747583A CN 103747583 A CN103747583 A CN 103747583A CN 201310756126 A CN201310756126 A CN 201310756126A CN 103747583 A CN103747583 A CN 103747583A
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Abstract
The invention relates to an LED (light emitting diode) lamp tube compatible with an electronic ballast of preheat current. The LED lamp tube comprises two buffer circuits, wherein the input end of each buffer circuit is connected to two electrodes of the lamp tube, and a resistor is in serial connection with the two electrodes; a waveform conversion circuit comprises a plurality of rectifying diodes, and the input end of the waveform conversion circuit is connected to the output end of each buffer circuit; the restoration time of each rectifying diode is less than 2.5 microseconds; two ends of an LED lamp string are connected to the output end of the waveform conversion circuit, and each LED lamp string is formed by serially joining a plurality of LED elements. The resistor is arranged between the two electrodes in serial connection, so that impedance exists between the two electrodes, no short-circuit current is produced between the two electrodes, and the electronic ballast and an LED lamp tube electrode interface can be prevented from being damaged.
Description
Technical field
The present invention relates to the fluorescent tube with LED, especially comprises the LED fluorescent tube of the compatible electric stabilizer at preheat curent.
Background technology
Traditional fluorescent lamp pipe is a kind of gas discharge type light source, therefore at the luminous front filament being arranged in fluorescent tube that must first heat, makes to manage interior gas ionization.In general, traditional fluorescent lamp pipe comprises the first electrode tip and one second electrode tip, is separately positioned on two ends in traditional fluorescent lamp pipe left and right, and is electrically connected to ac power output of electric stabilizer, the first two of electrode tip tools electrode, the second two of electrode tip tools electrode; Two filaments are arranged in fluorescent tube and are connected on respectively between electrode and electrode, at traditional fluorescent lamp pipe, do the used time, if adopt quick-starting direct or formula actuated type electric stabilizer can provide respectively preheat curent on the first electrode tip and the second electrode tip, preheat curent can be flowed through and is arranged on filament the heat filament in fluorescent tube, make to manage after interior gas ionization, traditional fluorescent lamp pipe can be luminous.LED fluorescent tube retains both designs of fluorescent tube mostly in order to mate conventional prior lamp holder now, object is to retain all no resistance connections between two ends of fluorescent tube, therefore, if directly LED fluorescent tube is plugged to using quick-starting direct or the formula actuated type electric stabilizer can be after electric power starting, by electric stabilizer, provide respectively electrode and electric pole short circuit electric current, short circuit current can damage electric stabilizer and LED lamp tube electrode interface, affects the useful life of electric stabilizer and LED lamp tube electrode interface.
Summary of the invention
The object of the present invention is to provide a kind of LED fluorescent tube of the compatible electric stabilizer at preheat curent.
The invention provides a kind of LED fluorescent tube of the compatible electric stabilizer at preheat curent, comprise two buffer circuits, be two electrode tips that are connected to respectively described fluorescent tube, wherein two of each buffer circuit outputs are two electrodes that are connected to respectively counter electrode end; Each buffer circuit is tool resistance string again, and described resistance is to be connected between described two electrodes of counter electrode end; It comprises multiple rectification diodes waveform changing circuit, and the input of described waveform changing circuit is connected to the output of described two buffer circuits; The recovery time of each rectification diode is little below 2.5us; Two end of LED lamp string is connected to the output of described waveform changing circuit; Each LED lamp string is to be formed by multiple LED element serial connections.
In some embodiments, described waveform changing circuit is full-bridge circuit.
In some embodiments, buffer circuit makes series resistance between described two electrodes, the output that one end of described resistance is described buffer circuit.
In some embodiments, described buffer circuit makes two resistance of connecting between two electrodes, between described two resistance, is the output of described buffer circuit.
In some embodiments, two ends of described LED lamp string are shunt capacitances.
In some embodiments, be little of 0.2us the recovery time of each rectification diode.
In some embodiments, described buffer circuit makes the output that one end of described resistance between described two electrodes is described buffer circuit.
Beneficial effect fruit of the present invention is: user is plugged in this Novel LED lamp tube prior lamp holder and starts power supply, by above-mentioned buffer circuit, designed, at least one resistance of meeting series connection between two electrodes of each electrode tip of fluorescent tube, making the electric stabilizer of tool preheat curent can apparent resistance be filament, with resistance simulation filament, allow smoothly the flow through series resistor of electrode tip of the preheat curent of electric stabilizer; Therefore, electric current can be subject to the restriction of at least one resistance, makes tool impedance between two electrodes and can not produce short circuit phenomenon, causes electric current excessive and infringement electric stabilizer and fluorescent tube.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of one embodiment of the present invention;
Embodiment
Below in conjunction with accompanying drawing and body embodiment, the present invention is done to progressive detailed description explanation.
The invention provides a kind of LED fluorescent tube of the compatible electric stabilizer at preheat curent, as shown in Figure 1, comprise the first buffer circuit 2, the second buffer circuit 3, waveform changing circuit 4 and LED lamp string 5, wherein electric stabilizer 1 its input is connected to AC power 6, and electric stabilizer 1 tool four ac output ends are also connected to respectively two electrode tips of fluorescent tube.
Two electrode t1 of the input connecting tube first electrode tip L of the first buffer circuit 2 and t2, output is connected to the input of waveform changing circuit 4.In the present embodiment, the first buffer circuit 2 is to comprise a resistance, and the resistance value of resistance is resistance value before equivalent filament pre-heating; Wherein two ends of resistance are connected to respectively two electrode t1 and the t2 of the first electrode tip L, and resistance is to be connected between two the electrode t1 and t2 of the first electrode tip L, prevents between two electrode T1 and L2 because not having impedance short circuit.Arbitrary end of the input of resistance is the output of the first buffering electricity 2.
Two electrode C1 of the second electrode tip N of the input connecting tube of the second buffer circuit 3 and C2, output is connected to the input of waveform changing circuit 4.In the present embodiment, the second buffer circuit 3 is to comprise a resistance, and the resistance value of resistance is resistance value before equivalent filament pre-heating; Wherein two of resistance ends are connected to respectively two electrode C1 and the C2 of the second electrode tip N, and meaning is that resistance is to be connected between two electrode C1 utmost point C2 of the second electrode tip, prevents between two electrode C1 and C2 because not having impedance short circuit.The arbitrary end of input of resistance is the output of the second buffer circuit 3.
Buffer circuit 3 also can comprise the resistance of two serial connections, two inputs that end is buffer circuit 3 of these two series resistors, and tandem node is the output of buffer circuit 3, can prevent equally between two electrode C1 and C2 because not having impedance short circuit; Wherein the resistance value of two series resistors is resistance values before equivalent filament pre-heating.
Waveform changing circuit 4 comprises multiple rectification diodes, to form a half-bridge circuit or a full-bridge circuit; The input of waveform changing circuit 4 is connected to respectively the output of the first buffer circuit 2 and the output of the second buffer circuit 3; The recovery time of each rectification diode is little below 2.5us, take electric stabilizer 1 as 4KHz as basis, and gets 1/1 of its cycle, overheated to prevent, is preferably below 1us or 0.2us.
Two ends of LED lamp string 5 are connected to the output of waveform changing circuit 4; LED lamp string 5 is to be formed by multiple LED element 51 serial connections; And can be at 5 two end electric capacity in parallel of LED lamp string, electric capacity charges during AC power is increased to crest voltage by low pressure, and LED lamp string 5 is discharged to it in AC power when crest voltage drops to low pressure, accumulate electric weight, the sudden strain of a muscle while lighting to solve LED lamp string 5 is phenomenon frequently; Generally speaking, the frequency of this stroboscopic very high (2KHZ-4KHZ), if add after electric capacity can by elimination completely; Electric capacity preferably capacitance between 1uF-2uF, because the frequency of electric stabilizer 1 is very high, therefore that capacitance does not need is too large.
User is plugged in this Novel LED lamp tube prior lamp holder and starts power supply, by the design of above-mentioned buffer circuit 2 and 3, at least one resistance makes can connect respectively between two electrode LI, the L2 of two electrode tip L of fluorescent tube and two electrode C1, the C2 of N, making the electric stabilizer 1 of tool preheat curent can be filament depending on this resistance, with resistance simulation filament, allow smoothly the flow through series resistor of electrode tip L and N of the preheat curent of electric stabilizer 1; Therefore, this electric current can be subject to the restriction of this at least one resistance, makes tool impedance between these two electrode L1, L2 and C1, C2 and can not produce short circuit phenomenon, causes this electric current excessive and damage this electric stabilizer 1 and this fluorescent tube.
Claims (7)
1. the LED fluorescent tube of a compatible electric stabilizer at preheat curent, it is characterized in that, comprising two buffer circuits, is two electrode tips that are connected to respectively described fluorescent tube, and wherein two of each buffer circuit outputs are two electrodes that are connected to respectively counter electrode end; Each buffer circuit is tool resistance string again, and described resistance is to be connected between described two electrodes of counter electrode end; It comprises multiple rectification diodes waveform changing circuit, and the input of described waveform changing circuit is connected to the output of described two buffer circuits; The recovery time of each rectification diode is little below 2.5us; Two end of LED lamp string is connected to the output of described waveform changing circuit; Each LED lamp string is to be formed by multiple LED element serial connections.
2. the LED fluorescent tube of the compatible electric stabilizer at preheat curent according to claim 1, is characterized in that, described waveform changing circuit is full-bridge circuit.
3. the LED fluorescent tube of the compatible electric stabilizer at preheat curent according to claim 2, is characterized in that described buffer circuit makes series resistance between described two electrodes, the output that one end of described resistance is described buffer circuit.
4. the LED fluorescent tube of the compatible electric stabilizer at preheat curent according to claim 1, is characterized in that, described buffer circuit makes two resistance of connecting between two electrodes, between described two resistance, is the output of described buffer circuit.
5. the LED fluorescent tube of the compatible electric stabilizer at preheat curent according to claim 1, is characterized in that, two ends of described LED lamp string are shunt capacitances.
6. the LED fluorescent tube of the compatible electric stabilizer at preheat curent according to claim 5, is characterized in that, be little of 0.2us the recovery time of each rectification diode.
7. the LED fluorescent tube of the compatible electric stabilizer at preheat curent according to claim 1, is characterized in that, described buffer circuit makes the output that one end of described resistance between described two electrodes is described buffer circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310756126.7A CN103747583A (en) | 2013-12-27 | 2013-12-27 | LED (light emitting diode) lamp tube compatible with electronic ballast of preheat current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310756126.7A CN103747583A (en) | 2013-12-27 | 2013-12-27 | LED (light emitting diode) lamp tube compatible with electronic ballast of preheat current |
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| Publication Number | Publication Date |
|---|---|
| CN103747583A true CN103747583A (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310756126.7A Pending CN103747583A (en) | 2013-12-27 | 2013-12-27 | LED (light emitting diode) lamp tube compatible with electronic ballast of preheat current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105792409A (en) * | 2015-01-08 | 2016-07-20 | 亚树科技股份有限公司 | Light-emitting diode lamp tube adaptive to electronic ballast or commercial power and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202603010U (en) * | 2012-05-24 | 2012-12-12 | 深圳市宝瑞恒业科技有限公司 | Driving circuit of compatible LED (Light Emitting Diode) lamp tube |
| CN102958263A (en) * | 2011-08-23 | 2013-03-06 | 台达电子企业管理（上海）有限公司 | Electronic stabilizer |
| CN103313461A (en) * | 2012-03-07 | 2013-09-18 | 杰仕特能源科技股份有限公司 | Replaceable electronic ballast lamp tube |
| CN103945592A (en) * | 2013-01-21 | 2014-07-23 | 朗捷科技股份有限公司 | LED lamp tube compatible with electronic stabilizer having preheating current |
-
2013
- 2013-12-27 CN CN201310756126.7A patent/CN103747583A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102958263A (en) * | 2011-08-23 | 2013-03-06 | 台达电子企业管理（上海）有限公司 | Electronic stabilizer |
| CN103313461A (en) * | 2012-03-07 | 2013-09-18 | 杰仕特能源科技股份有限公司 | Replaceable electronic ballast lamp tube |
| CN202603010U (en) * | 2012-05-24 | 2012-12-12 | 深圳市宝瑞恒业科技有限公司 | Driving circuit of compatible LED (Light Emitting Diode) lamp tube |
| CN103945592A (en) * | 2013-01-21 | 2014-07-23 | 朗捷科技股份有限公司 | LED lamp tube compatible with electronic stabilizer having preheating current |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105792409A (en) * | 2015-01-08 | 2016-07-20 | 亚树科技股份有限公司 | Light-emitting diode lamp tube adaptive to electronic ballast or commercial power and control method thereof |
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Application publication date: 20140423 |