CN102635804A - LED (light-emitting diode) lamp tube capable of replacing T5 fluorescent lamp - Google Patents
LED (light-emitting diode) lamp tube capable of replacing T5 fluorescent lamp Download PDFInfo
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Abstract
The invention relates to an LED (light-emitting diode) lamp tube capable of replacing a T5 fluorescent lamp. The LED lamp tube comprises a lamp head, standard T5 lamp tube aluminum profile, a PCB (printed circuit board), a lamp shade, an LED lamp bead assembled on the PCB and a power supply module, wherein the power supply module comprises an anti-surge unit, a rectification filtering unit, a first LED lamp group, a linear constant current unit and a second LED lamp group which are successively connected; the power supply module also comprises a switching control unit, and the switching control unit is connected with the rectification filtering unit and can respectively control the first LED lamp group and the second LED lamp group; when the switching control unit detects that a low-frequency signal is output after the rectification, the switching control unit can not output a control signal, and first LED lamp group, the linear constant current unit and the second LED lamp group form a tandem working mode; and when the switching control unit detects that a high-frequency signal is output after the rectification, the switching control unit can output the control signal, and first LED lamp group and the second LED lamp group are switched to a parallel operation mode so as to realize automatic switchover.
Description
Technical field:
The invention belongs to lighting field; Be particularly related to a kind of LED fluorescent tube of replaceable T5 fluorescent lamp; Especially can be directly installed on the T5 straight tube fluorescent lamp lamp bracket, need not to remove the direct alternative of electron rectifier, also can directly insert the LED fluorescent tube of the T5 standard model of civil power use and tunable optical.
Background technology:
Because the LED fluorescent tube is more energy-conservation 50% than straight tube fluorescent lamp, along with the development of LED technology, energy-conservation ratio also will continue to improve, and fluorescent tube exists the life-span to lack, and contains reasons such as mercury pollution, and straight tube fluorescent lamp is just progressively replaced by the LED fluorescent tube.At present profile is T8 (25.4 millimeters of a diameter), and the LED fluorescent tube of T10 (31.8 millimeters of diameters), its aluminium section bar cooling stand have enough spaces driver module of packing into, therefore alternative existing T8, T10 fluorescent tube.But T5 (diameter the is 15.875 millimeters) fluorescent tube of present occuping market leading position, its space is little, if will replace to the LED fluorescent tube, the complicated circuit of then can't packing into; Drive circuit can only be external, and is general as the electron rectifier of fluorescent lamp, perhaps the lamp bracket of a built-in driver module of tyre; Need change support or remove original drive circuit during LED fluorescent tube replacement fluorescent tube, and new driving is installed, operation is complicated; Expense is high, and the improper potential safety hazard that causes easily is installed, and use has inconvenience more.
T5 lamp bracket in the factory floor, particularly cleaning shop, because of standard-required, lamp bracket also must reach the purification requirement, and lamp bracket is big and complicated usually.If will change the LED fluorescent tube, then must the dismounting lamp bracket, change driving power, install again, or change whole lamp bracket, replacement inconvenience, cost is high and cause potential safety hazard easily.
The LED fluorescent tube behind the power supply breaks down in the lamp bracket if change, and needs repairing or upgrades, and then can only change same company, the product of same model could with built-in power supply coupling.The update of technology possibly occur not having the product of same model to supply with, and then must change power module again, or a whole set of the replacing.The complicated cost of operation is high, can't be general.
The electron rectifier fluorescent lamp; What electronic rectifier output drove fluorescent tube is the AC power of high-frequency and high-voltage; The high pressure that its work leans on two semiconductor power devices to form self-excitation half-bridge or its sharp half-bridge generation comes the fluorescence excitation fluorescent tube luminous; After exciting, electron rectifier output is the high-frequency ac constant-current supply, and fluorescent tube then is an impedance device.
Electrochemical capacitor also is widely used in the drive circuit at present, and because of the quality of electrochemical capacitor is uneven, poor reliability and life-span are short, and performance and life-span temperature influence are big.Though LED lamp pearl can accomplish 50000 to 100000 hours and even the longer life-span that the life-span of electrochemical capacitor far is shorter than lamp pearl or other components and parts, it becomes the thinnest part that falls that influences the LED lamp life.
Application number is: 201110212985.0 patent, though accomplished to pack drive circuit in the fluorescent tube of T5 into, can not directly replace, and also need remove original electron rectifier.The circuit of this patent also exists each LED lamp pearl luminous asynchronous, the uneven problem of lighting tube brightness.
Application number is: 201110285980.0 patent, though realized electron rectifier or the general circuit of civil power, complicated circuit, device is many, can only external driving or be assemblied in T8 or the fluorescent tube of T10, the T5 fluorescent tube of can't packing into.
Summary of the invention:
The objective of the invention is to invent and a kind of drive circuit is packed in the T5 specification fluorescent tube, both can not remove electron rectifier, directly replace fluorescent tube and use, also can directly insert the LED fluorescent tube of the replaceable T5 fluorescent lamp of civil power work.
Technical scheme of the present invention is achieved in that a kind of LED fluorescent tube of replaceable T5 fluorescent lamp, comprise lamp holder, T5 fluorescent tube specification aluminium section bar, pcb board, lampshade, be assemblied in LED lamp pearl and power module on the pcb board; Pcb board is fixed on the aluminium section bar, and lamp holder is installed in the aluminium section bar two ends, and is electrically connected with pcb board; It is characterized in that the aluminium section bar cross section becomes the semi arch moulding; Radially form a mounting plane; Long limit, mounting plane both sides convexes with locking edge respectively, and two relative one sides of locking edge have a reducing, one side mutually far away have one can let lampshade slip into buckling groove; The back side disjunctor of said mounting plane has radiating fin, and the radiating fin end constitutes the semi arch moulding; Said mounting plane surfaces coated is covered with heat conductive silica gel, and pcb board is parallel to be pressed among two locking edges, and by the systolic pressure of the lampshade of outer button; Draw-in groove both sides aluminium section bar pushes inwardly; Clamp pcb board, by the reducing clamping of two locking edges therein, close adhesion is on described mounting plane; The lamp holder inboard has the electroconductive elastic sheet that is electrically connected with the lamp holder external electrode, and lamp holder is installed in the aluminium section bar two ends, and the shell fragment that is in place distortion is conflicted on the pcb board conductive contact, forms to be electrically connected; Power module comprises antisurge unit, rectification filtering unit, a LED lamp group, linear constant current unit and the 2nd LED lamp group that connects successively; Power module comprises that also one switches control module, and switch control unit connects rectification filtering unit, and controls a LED lamp group and the 2nd LED lamp group respectively; When after switch control unit detects rectification, being output as low frequency signal, switch control unit is not exported control signal, and a LED lamp group, linear constant current unit and the 2nd LED lamp group form the tandem working pattern; When after switch control unit detects rectification, being output as high-frequency signal, switch control unit output control signal switches to a LED lamp group and the 2nd LED lamp group is the parallel operation pattern, and closes linear constant current unit; A described LED lamp group and the 2nd LED lamp group are by after several LED lamp pearl series connection, the combination that again several LED lamp pearl strings is connected together.
Said lamp holder is the outer polygonized structure of interior circle, and leave toward aluminium section bar one lateral deviation at the center of interior circle; Corresponding lampshade one side of said lamp holder has an extension.The eccentric design of lamp holder both can prevent to roll when the round lamp tube storage from placing, and also can avoid the operator to adorn wrong direction; Moreover the outer polygon design of lamp holder; The person of being easy to use is by tool operation, and the extension of corresponding lampshade one side loads and unloads fluorescent tube in the time of can avoiding the fluorescent tube waste heat to loose and irons hand.
Said lamp holder forms the plug tenon of disjunctor inwardly, is plugged in by this plug tenon in the gap of aluminium section bar radiating fin, forms embedded location structure.
The mounting plane back side of said aluminium section bar is domes, and its cross section thick middle is gradually toward the both sides attenuation; Described radiating fin is distributed on the described domes surface.Thicken in the middle of the aluminium section bar and help the heat conduction.
Said antisurge unit is made up of with the piezo-resistance R1 that is attempted by on the input a fuse Fuse who is serially connected on the loop.
Said rectification filtering unit is that high frequency bridge heap D1, fast recovery diode D2 and high-frequency filter capacitor C4 form, and rectifier bridge heap D1 output meets diode D2, and diode D2 output meets high-frequency filter capacitor C4; Described high-frequency filter capacitor C4 adopts electric capacity of the dacron or high pressure patch capacitor.
Said switch control unit is by three capacitor C 1, C2, and C3, resistance R 1, pressure limiting diode Z1 and two controllable silicon SCR 1 and SCR2 form; Capacitor C 1, C2, C3 and resistance R 1 are formed a capacitance partial pressure circuit, and capacitor C 2 high-pressure sides connect the control pin of controllable silicon SCR 1, and controllable silicon SCR 1 connects respectively between rectification filtering unit output and the 2nd LED lamp group input; The high-pressure side of capacitor C 3 links to each other with the control pin of silicon controlled SCR2 behind pressure limiting diode Z1, and controllable silicon SCR 2 connects respectively between the 2nd LED lamp group output and the backflow; By the break-make of two controllable silicon SCR 1 and SCR2, switching a LED lamp group and the 2nd LED lamp group is the mode of operation in parallel connection or series connection.
Said linear constant current unit is made up of two triode Q1, Q2, resistance R 2, R3, high speed recovery diode D3 and voltage-stabiliser tube Z2; Triode Q1, Q2 form multiple tube, and resistance R 2 is connected between the colelctor electrode and base stage of multiple tube, and voltage-stabiliser tube Z2 connects the base stage and the output of multiple tube; Resistance R 3 is serially connected on multiple tube emitter stage and the output, and high speed recovery diode D3 is connected on the unit input; Described triode Q1 is the low-power triode, and triode Q2 is a switch triode; This unit input is connected with the output of a LED lamp group, and output is connected with the input of the 2nd LED lamp group.
Adopt linear constant current unit and two LED lamp groups in the power module of the present invention; Make the LED fluorescent tube of T5 specification can directly replace the T5 fluorescent lamp; Be installed on the T5 fluorescent lamp lamp bracket, be operated in the electron rectifier rear end, can make full use of the conventional fluorescent lamp bracket; Need not to carry out track remodelling, directly replacement is used; Also can realize seamless compatibility directly by the 220V mains-supplied; And the cooperation switch control unit, according to civil power or the different input conditions of electron rectifier, two the LED lamp groups that automatically switch are for series connection or parallel operation pattern, to guarantee under two states the uniformity of LED lamp group light efficiency; The lamp pearl is luminous synchronously, and stable, brightness is even, and can insert controllable silicon or pressure regulator at input, realizes the linearity light adjusting function; Whole power module does not adopt big capacitive or perceptual components and parts, and power factor is high, moreover, not adopting electrochemical capacitor in the module, circuit is more stable, can prolong the life-span of the use of whole fluorescent tube greatly.
Description of drawings:
Below in conjunction with concrete legend the present invention is further specified:
The LED fluorescent tube perspective exploded view of the replaceable T5 fluorescent lamp of Fig. 1
Fig. 2 aluminium section bar schematic cross-section
The LED tube power module principle block diagram of the replaceable T5 fluorescent lamp of Fig. 3
Fig. 4 power module circuitry schematic diagram
Fig. 5 LED fluorescent tube is directly replaced the line sketch map of fluorescent tube
Fig. 6 LED fluorescent tube connects city's electrical wiring sketch map
Fig. 7 LED fluorescent tube connects city's electrical wiring sketch map behind controllable silicon
Wherein
1-aluminium section bar 11-mounting plane 12-locking edge
The little convex edge of 121-122-buckling groove 13-radiating fin
2-lamp holder 21-electrode 22-shell fragment
23-extension 24-plug tenon 3-PCB plate
The 4-lampshade 41-5-LED of falling flanging lamp pearl
6-power module 61-resolution element
The specific embodiment:
See figures.1.and.2, the LED fluorescent tube of replaceable T5 fluorescent lamp comprises, the aluminium section bar 1 of T5 fluorescent tube specification, and lamp holder 2, pcb board 3, lampshade 4 is assemblied in LED lamp pearl 5 and power module 6 on the pcb board 3; In this structure, the resolution element 61 of power module 6 is welded on pcb board 3 two respectively, and LED lamp pearl 5 is welded on the centre, avoids resolution element 61 to take intermediate space.Aluminium section bar 1 cross section becomes the semi arch moulding; Radially form a mounting plane 11, long limit, mounting plane 11 both sides convexes with 12, two locking edges of locking edge, 12 relative one sides respectively and has a reducing; This reducing is formed by the little convex edge 121 of locking edge 12 ends; And one side mutually far away has a buckling groove 122, and the flanging 41 that falls of lampshade 4 both sides can slip into location in this buckling groove 122, otherwise also two locking edges 12 is formed constraint; The back side disjunctor of said mounting plane 11 has radiating fin 13, and radiating fin 13 ends constitute the semi arch moulding; More particularly, the mounting plane back side of aluminium section bar 1 is domes, and its cross section thick middle toward the both sides attenuation, is beneficial to heat conduction gradually, and described radiating fin 13 is distributed on the described domes surface.
The installation of pcb board 3, said mounting plane 11 surfaces coated are covered with the heat conductive silica gel with high bonding force, pcb board 3 parallel being pressed among two locking edges 12; And by the systolic pressure of the lampshade 4 of outer button; Draw-in groove both sides aluminium section bar pushes inwardly, clamps pcb board 3, also promptly need not screw and fixes; Can be therein by the reducing clamping of two locking edges 12, close adhesion is on described mounting plane 11.The pcb board 3 that this instance is mentioned is to adopt the high heat conduction CEM-3PCB of the R1787 of Panasonic plate.
With reference to Fig. 3 and Fig. 4, power module comprises antisurge unit, rectification filtering unit, a LED lamp group, linear constant current unit and the 2nd LED lamp group that connects successively; Power module comprises that also one switches control module, and switch control unit connects rectification filtering unit, and controls a LED lamp group and the 2nd LED lamp group respectively; When directly connecing civil power (low-frequency power), switch control unit is output as low frequency signal after detecting rectification, and switch control unit is not exported control signal, and a LED lamp group, linear constant current unit and the 2nd LED lamp group form the tandem working pattern; When being connected on the electron rectifier rear end; Because electron rectifier is output as high frequency electric source, switch control unit is output as high-frequency signal after detecting rectification, switch control unit output control signal; Switch to a LED lamp group and the 2nd LED lamp group is the parallel operation pattern, and close linear constant current unit.
A wherein said LED lamp group and the 2nd LED lamp group are by after several LED lamp pearl series connection, the combination that again several LED lamp pearl strings is connected together.
The antisurge unit is made up of with the piezo-resistance R1 that is attempted by on the input a fuse Fuse who is serially connected on the loop.Open, close or Disturbance in Power Net when producing when the LED fluorescent tube, bigger high-frequency impulse is arranged, can cause damage, the safeguard measure of being done to circuit in order to prevent it.The effect of one of which, fuse Fuse (fuse) is: after electric current reaches a period of time of fuse nominal value, make the melt fusing with the heat that himself produces, thereby circuit is broken off, protected the rear end electronic device; Two, the effect of piezo-resistance U is: be high resistance measurement under the normality; When the pulse voltage maximum when power network fluctuation reaches piezo-resistance and inspires voltage; The electric current that flows through piezo-resistance increases sharply, thereby the voltage of clamping down on plays the effect of protection to the load of back.After surge disappeared, piezo-resistance automatically replied into the high impedance components and parts.
Rectification filtering unit is that high frequency bridge heap D1, fast recovery diode D2 and high-frequency filter capacitor C4 form, and rectifier bridge heap D1 output meets diode D2, and diode D2 output meets high-frequency filter capacitor C4; Described high-frequency filter capacitor C4 adopts electric capacity of the dacron or high pressure patch capacitor.The effect of high frequency bridge heap is that the high frequency electric source with low frequency civil power or electron rectifier output converts dc source to.Described high-frequency filter capacitor C4 adopts electric capacity of the dacron or high pressure patch capacitor, and is good than the electrochemical capacitor durability, can prolong the service life of whole fluorescent tube.The effect of high frequency bridge heap D1 is that the high frequency electric source with low frequency civil power or electron rectifier output converts dc source to; When: when A) leading to high frequency; Capacitance calculates gained according to the operating frequency of electron rectifier; Make high-frequency signal constitute the loop, be output as the low frequency direct current composition about 100Hz after the rectifying and wave-filtering through this electric capacity and electron rectifier.B) during external civil power, behind rectifying and wave-filtering, be output as the low frequency direct current of double mains frequency.No matter connect electron rectifier or civil power, output is the low frequency direct current after rectifying and wave-filtering.
Switch control unit is by three capacitor C 1, C2, and C3, resistance R 1, pressure limiting diode Z1 and two controllable silicon SCR 1 and SCR2 form; Capacitor C 1, C2, C3 and resistance R 1 are formed a capacitance partial pressure circuit, and capacitor C 2 high-pressure sides connect the control pin of controllable silicon SCR 1, and controllable silicon SCR 1 connects respectively between rectification filtering unit output and the 2nd LED lamp group input; The high-pressure side of capacitor C 3 links to each other with the control pin of silicon controlled SCR2 behind pressure limiting diode Z1, and controllable silicon SCR 2 connects respectively between the 2nd LED lamp group output and the backflow; By the break-make of two controllable silicon SCR 1 and SCR2, switching a LED lamp group and the 2nd LED lamp group is the mode of operation in parallel connection or series connection.Operation principle, when external power supply is low frequency (external 220V civil power), electric current can't pass through capacitor seriesing circuit; This loop can be considered open circuit; SCR control end no-voltage, the controllable silicon open circuit, a LED lamp group, linear constant current unit and the 2nd LED lamp group form the tandem working pattern; When external power supply is the high frequency electric source of electron rectifier output, capacitor C 1, C2, C3 and resistance R 1 are formed a capacitance partial pressure circuit, and voltage reaches the silicon controlled trigger voltage, the controllable silicon conducting, a LED lamp group and the 2nd LED lamp group form the parallel operation pattern.
Linear constant current unit is made up of two triode Q1, Q2, resistance R 2, R3, high speed recovery diode D3 and voltage-stabiliser tube Z2; Triode Q1, Q2 form multiple tube, and resistance R 2 is connected between the colelctor electrode and base stage of multiple tube, and voltage-stabiliser tube Z2 connects the base stage and the output of multiple tube; Resistance R 3 is serially connected on multiple tube emitter stage and the output, and high speed recovery diode D3 is connected on the unit input; Described triode Q1 is the low-power triode, and triode Q2 is a switch triode; This unit input is connected with the output of a LED lamp group, and output is connected with the input of the 2nd LED lamp group.
High speed recovery diode D3 is connected on the unit input, when external civil power, and the diode forward conducting, when the exoelectron rectifier, linear constant current unit output current potential is higher than the input current potential, and diode reverse is ended.
The effect one of linear constant current unit: a stable operating current is provided for LED lamp group, the electric current that prevents to flow through the LED lamp is excessive, burns out the lamp pearl; Effect two: this element can disappear the crest voltage of input fall, and can stablize the effect of input power, and when preventing that input voltage from changing, LED lamp group is because of the problem of voltage, and electric current increases sharply, thereby causes input power also to increase sharply.When two lamps compositions were connected in parallel, this linearity constant current unit oppositely ended, and because of electron rectifier is output as constant-current source, did not need to increase the current limliting unit this moment again.
Two multiple tubes that triode is combined into, its effect are that the resistance of resistance R 2 can be got greatly as far as possible, and resistance R 3 is current sampling resistors, through changing its resistance, can adjust the supply current of LED lamp group.
If the input termination is the civil power of 50Hz/60Hz, the electric current that behind rectifying and wave-filtering, flows through the lamp pearl is near square wave, before input, adds controllable silicon dimmer, can change the input angle of flow, flows through the ON time of LED lamp pearl thereby change electric current, thereby carries out light modulation.
T5LED fluorescent tube standard operation state of the present invention is 220V, 50/60Hz, the directly following line work of compatibility:
1) 160v-265v, the 50/60Hz ac power supply line;
2) 160v-265v, the 50/60Hz Alternating Current Power Supply connects controllable silicon or pressure regulator power supply circuits;
3) 85V-265V, the electron rectifier supply line of 50/60Hz power supply;
4) 85V-265V, the 50/60Hz Alternating Current Power Supply meets the electron rectifier supply line that pressure regulator is supplied power.
5) 200v-300v, direct current supply line.
The concrete marginal data of LED fluorescent tube line of replaceable T5 fluorescent lamp is a connecting line construction of directly replacing fluorescent tube like Fig. 5, and Fig. 6 is direct connecting line construction by mains-supplied, and Fig. 7 is the connecting line construction that behind controllable silicon light modulation, inserts civil power.
The test result of the LED fluorescent tube of replaceable T5 fluorescent lamp is following:
Testing equipment: a distant place 9800 power measurings, the 0-300V AC voltage regulator exchanges isolating transformer;
Directly connect AC power:
| Voltage (v) | Electric current (ma) | Power (W) | Power factor |
| 220 | 82 | ?168 | 0921 |
External connected electronic rectifier (the excessive lamp bracket of celebrating)
1. when working when meeting civil power 220V, power 16W, than fluorescent lamp T5 fluorescent tube (28W), economize on electricity 12W surpasses 0.9 power factor.
2. when connecing electron rectifier work; When external voltage is low to moderate electron rectifier can't starting of oscillation time the (if connect fluorescent tube, this moment, fluorescent tube can't starter, and fluorescent tube is bright not to get up); The automatic hoisting power work of LED fluorescent tube; Keep good illumination output, after external voltage raise, fluorescent tube automatically switched to normal operating conditions.During normal voltage 220V, power output is 16W, than fluorescent tube power saving 12W.Power factor is high.
Claims (8)
1. the LED fluorescent tube of a replaceable T5 fluorescent lamp, comprise lamp holder, T5 fluorescent tube specification aluminium section bar, pcb board, lampshade, be assemblied in LED lamp pearl and power module on the pcb board; Pcb board is fixed on the aluminium section bar, and lamp holder is installed in the aluminium section bar two ends, and is electrically connected with pcb board; It is characterized in that the aluminium section bar cross section becomes the semi arch moulding; Radially form a mounting plane; Long limit, mounting plane both sides convexes with locking edge respectively, and two relative one sides of locking edge have a reducing, one side mutually far away have one can let lampshade slip into buckling groove; The back side disjunctor of said mounting plane has radiating fin, and the radiating fin end constitutes the semi arch moulding; Said mounting plane surfaces coated is covered with heat conductive silica gel, and pcb board is parallel to be pressed among two locking edges, and by the systolic pressure of the lampshade of outer button; Draw-in groove both sides aluminium section bar pushes inwardly; Clamp pcb board, by the reducing clamping of two locking edges therein, close adhesion is on described mounting plane; The lamp holder inboard has the electroconductive elastic sheet that is electrically connected with the lamp holder external electrode, and lamp holder is installed in the aluminium section bar two ends, and the shell fragment that is in place distortion is conflicted on the pcb board conductive contact, forms to be electrically connected; Power module comprises antisurge unit, rectification filtering unit, a LED lamp group, linear constant current unit and the 2nd LED lamp group that connects successively; Power module comprises that also one switches control module, and switch control unit connects rectification filtering unit, and controls a LED lamp group and the 2nd LED lamp group respectively; When after switch control unit detects rectification, being output as low frequency signal, switch control unit is not exported control signal, and a LED lamp group, linear constant current unit and the 2nd LED lamp group form the tandem working pattern; When after switch control unit detects rectification, being output as high-frequency signal, switch control unit output control signal switches to a LED lamp group and the 2nd LED lamp group is the parallel operation pattern, and closes linear constant current unit; A described LED lamp group and the 2nd LED lamp group are by after several LED lamp pearl series connection, the combination that again several LED lamp pearl strings is connected together.
2. the LED fluorescent tube of replaceable T5 fluorescent lamp according to claim 1 it is characterized in that lamp holder is the outer polygonized structure of interior circle, and the center of interior circle is left toward aluminium section bar one lateral deviation; Corresponding lampshade one side of said lamp holder has an extension.
3. the LED fluorescent tube of replaceable T5 fluorescent lamp according to claim 1 and 2 is characterized in that said lamp holder forms the plug tenon of disjunctor inwardly, is plugged in by this plug tenon in the gap of aluminium section bar radiating fin, forms embedded location structure.
4. the LED fluorescent tube of replaceable T5 fluorescent lamp according to claim 1, the mounting plane back side that it is characterized in that aluminium section bar is domes, its cross section thick middle is gradually toward the both sides attenuation; Described radiating fin is distributed on the described domes surface.
5. the LED fluorescent tube of replaceable T5 fluorescent lamp according to claim 1 is characterized in that the antisurge unit is made up of with the piezo-resistance R1 that is attempted by on the input a fuse Fuse who is serially connected on the loop.
6. the LED fluorescent tube of replaceable T5 fluorescent lamp according to claim 1; It is characterized in that rectification filtering unit is that high frequency bridge heap D1, fast recovery diode D2 and high-frequency filter capacitor C4 form; Rectifier bridge heap D1 output meets diode D2, and diode D2 output meets high-frequency filter capacitor C4; Described high-frequency filter capacitor C4 adopts electric capacity of the dacron or high pressure patch capacitor.
7. the LED fluorescent tube of replaceable T5 fluorescent lamp according to claim 1 is characterized in that switch control unit by three capacitor C 1, C2, and C3, resistance R 1, pressure limiting diode Z1 and two controllable silicon SCR 1 and SCR2 form; Capacitor C 1, C2, C3 and resistance R 1 are formed a capacitance partial pressure circuit, and capacitor C 2 high-pressure sides connect the control pin of controllable silicon SCR 1, and controllable silicon SCR 1 connects respectively between rectification filtering unit output and the 2nd LED lamp group input; The high-pressure side of capacitor C 3 links to each other with the control pin of silicon controlled SCR2 behind pressure limiting diode Z1, and controllable silicon SCR 2 connects respectively between the 2nd LED lamp group output and the backflow; By the break-make of two controllable silicon SCR 1 and SCR2, switching a LED lamp group and the 2nd LED lamp group is the mode of operation in parallel connection or series connection.
8. the LED fluorescent tube of replaceable T5 fluorescent lamp according to claim 1 is characterized in that linear constant current unit is made up of two triode Q1, Q2, resistance R 2, R3, high speed recovery diode D3 and voltage-stabiliser tube Z2; Triode Q1, Q2 form multiple tube, and resistance R 2 is connected between the colelctor electrode and base stage of multiple tube, and voltage-stabiliser tube Z2 connects the base stage and the output of multiple tube; Resistance R 3 is serially connected on multiple tube emitter stage and the output, and high speed recovery diode D3 is connected on the unit input; Described triode Q1 is the low-power triode, and triode Q2 is a switch triode; This unit input is connected with the output of a LED lamp group, and output is connected with the input of the 2nd LED lamp group.
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| CN201210120800.8A CN102635804B (en) | 2012-04-23 | 2012-04-23 | LED (light-emitting diode) lamp tube capable of replacing T5 fluorescent lamp |
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| CN201210120800.8A CN102635804B (en) | 2012-04-23 | 2012-04-23 | LED (light-emitting diode) lamp tube capable of replacing T5 fluorescent lamp |
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| CN102635804B CN102635804B (en) | 2014-04-02 |
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| CN104470154A (en) * | 2014-12-24 | 2015-03-25 | 陈畅 | Household table lamp control circuit |
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| US11226073B2 (en) | 2015-03-10 | 2022-01-18 | Jiaxing Super Lighting Electric Appliance Co., Ltd. | Led tube lamp |
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| WO2018040611A1 (en) * | 2016-08-27 | 2018-03-08 | Kwok Leo | Method and apparatus for retrofitting fluorescent tube lamps to light emitting diodes |
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Application publication date: 20120815 Assignee: XIAMEN FLOW PHOTOELECTRIC CO., LTD. Assignor: Hou Liguang Contract record no.: 2014350000061 Denomination of invention: LED (light-emitting diode) lamp tube capable of replacing T5 fluorescent lamp Granted publication date: 20140402 License type: Exclusive License Record date: 20140612 |
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