CN105530737A - LED lamp with dual mode operation - Google Patents
LED lamp with dual mode operation Download PDFInfo
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- CN105530737A CN105530737A CN201510556679.7A CN201510556679A CN105530737A CN 105530737 A CN105530737 A CN 105530737A CN 201510556679 A CN201510556679 A CN 201510556679A CN 105530737 A CN105530737 A CN 105530737A
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Abstract
An LED lamp has dual modes of operation from fluorescent lamp fixtures. A first circuit powers at least one LED in a first mode of operation when first and second power connector pins at a first end of the lamp are inserted into power receptacles of the fixture that are directly connected to power mains. A second circuit powers at least one LED in a second mode of operation when the second power connector pin at the first end of the lamp and a third power connector pin at a second end of the lamp are inserted into power receptacles of a fixture powered from an electronic ballast. First and second conduction control means permit the second circuit to power at least one LED during the second mode of operation.
Description
Technical field
The LED that the present invention relates to adopts dual-mode operation, can connect transmission of electricity electric power by fluorescent lamp holder or provide electric power by the electric ballast be connected with lamp bracket.
Background technology
After a kind of circuit of traditional slender type LED (light-emitting diode) lamp reconfigures, existing fluorescent lighting fixture can be transformed into, so that directly for LED provides main power source.LED after " transformation ", normally transmits electric power from a pair power pins of lamp one end, has a pair connector pin at the other end of lamp, and they are not used to transmit electric power, but provides machinery support for lamp.Power pins by lamp one end mentioned above carries out the design of powering, and contributes to reducing installation personnel in the installation process of lamp, because suffering the potential life threat that principal current electric shock produces.
Method slender type LED being transformed into existing fluorescent lighting fixture that the second is traditional, need not reconfigure the circuit of light fixture, only electronic ballast for fluoresent lamp need be used to realize.When there being fluorescent lamp, LED retrofit lamp obtains electric power from the power pins at the two ends (namely contrary two ends) of lamp.The product of to be the patent No. of Park invention be US8,089, the 213B2 of the representative type of this repacking lamp.ParkLED lamp, by being connected with fluorescent lamp holder by existing fluorescent lamp ballast, carries out single-mode operation.At the 26th – 30 row on the 4th hurdle of this patent, Park indicate use the capacitor C11 in its Fig. 1 ?C14 " control the electric capacity of fluorescent lamp ballast series resonant circuit ".Because the frequency of Park fluorescent lamp ballast is up to 50 kilo hertzs (the 58th row on the 8th hurdle and the 4th row on 11 hurdles), capacitor C11 ?C14 also must have a high impedance, its supply frequency is 50 or 60 hertz.Like this, capacitor C11 ?C14 just effectively can reduce the frequency of electric current, prevent because because of carelessness LED retrofit lamp and fluorescent lamp ballast being directly connected on main power source, and cause potential fatal shock hazard.
The LED producing a kind of dual-mode operation time Design of Luminaires teacher think transforms lamp, and existing fluorescent lamp ballast can be connected with fluorescent lighting fixture by it, also can directly be connected with power line.The U.S. Patent number of people's developments such as clock is US8, and the product of 575,856B2 is a dual-mode operation LED.But no matter be powered by AC power or existing electronic ballast for fluoresent lamp, it is all the use of a single main circuit is that LED in lamp powers.With simple by AC power, or electronic ballast for fluoresent lamp is powered and is compared, and this practice reduces potential energy source efficiency and the stability of light fixture.
The LED also defectiveness of people's developments such as clock, when light fixture is directly connected on power line, it cannot alleviate potential fatal shock hazard.This is because under the state of AC power work, LED use electric power with electronic ballast for fluoresent lamp on identical circuit.So just have potential shock hazard, namely in mounted lamp process, the life of installation personnel is threatened.
Therefore, LED that we will design transforms lamp will adopt dual-mode operation, both existing electronic ballast for fluoresent lamp can be connected with fluorescent lighting fixture, also can be efficient and stable directly to be powered by power circuit realization.Meanwhile, in the configuration of lamp, also take into full account and how to have evaded the fatal shock hazard of the potentiality produced when lamp is contained in and light fixture is directly connected with the power supply of power line.
Summary of the invention
Present invention incorporates the dual-mode operation that LED transforms lamp.In the first pattern, LED transforms the electric power of lamp reception from fluorescent lamp holder; Another, in second pattern, LED transforms lamp and obtains electric power by the electric ballast of fluorescent lamp holder.In the flrst mode, LED obtains electric power by a pair power pins of lamp one end.Under the second mode, LED obtains electric power by the electronic ballast for fluoresent lamp be connected with light fixture.Above-mentioned dual-mode operation supports the operation of the first and second operator schemes respectively by the first and second circuit.First and second circuit are shared a LED power pins and are generally identical light-emitting diode provides electric power, and the first and second circuit can carry out electric isolution by novel conduction control model.
Under a kind of mode, dual-mode operation LED provided by the invention, is connected by fluorescent lamp holder provides electric power with transmission of electricity electric power, or provide AC power by electric ballast with ballast frequency.This LED has an elongated shell, and the housing of shell has two ends.First end is configured with the first and second power pins.Second end is configured with the 3rd power pins.At least one LED that first circuit is the first pattern provides main electric power, and provides extraneous light along the outer rim of housing.When LED is encased in (contact point of power source on frame can receive the electric power of the first and second power pins) on fluorescent lamp holder, and when being directly connected with power line, first pattern occurs, and the frequency of Power supply is far below ballast frequency mentioned above.First circuit limits the electric current supply of at least one LED under the first pattern.Second circuit provides main electric power at least one LED under the second pattern, and provides extraneous light along the outer rim of housing.When LED to be encased on fluorescent lamp holder (power contact on lamp bracket can receive second and the 3rd electric power of power pins), second pattern occurs, and another opposite end of LED is connected with electric ballast and receives electric power.The rectification circuit reception second comprised in second circuit and the electric power of the 3rd power pins.First conduction control member is connected between second source pin and rectification circuit, when second is connected with electric ballast at the other end of lamp with the 3rd power pins, ensures that second circuit transmits electric power at least one LED in the second mode.Second conduction control member is connected on the 3rd between power pins and rectification circuit, when second is connected with electric ballast in another opposite end of lamp with the 3rd power pins, ensures that second circuit transmits electric power at least one LED in the second mode.
When some is concrete, have at least a LED to power in the flrst mode, and at least one LED can at the second mode power, they have a common LED at least.In other cases, have at least a LED to power in the flrst mode, and at least one LED can at the second mode power, but they do not have common LED.
Above-mentioned LED can be transformed into existing fluorescent lamp holder, possesses dual-mode operation, both existing electronic ballast for fluoresent lamp can be connected with light fixture, or directly can obtain electric power by power line.Its advantage is, when lamp to be installed on light fixture be directly connected with power line obtain power time, LED configures the potential hazard that can alleviate fatal electric shock and bring.Also the extra precautionary measures are provided for avoiding installation personnel to get shocked in the invention configuration of this lamp.
In addition, the operation of above-mentioned LED is more more effective than using, and says as multiple existing reference, and it is to be powered by electric ballast or direct by power line power taking that single main circuit can respond to lamp device, and provides applicable electric power for LED.According to summed up above, what the present invention used is not a main circuit, but obtains by the first and second circuit the power supply that power line connects electricity or existing fluorescent lamp ballast.When this method eliminates use active LED driving main circuit, carried out the energy loss of reprocessing generation by existing fluorescent lamp ballast.Adopt in this way, usual second circuit only needs several passive component, as diode rectifier circuit and one or more capacitor, provides cost savings.
Accompanying drawing explanation
Hereafter describing in detail and drawing (wherein corresponding element has corresponding Ref. No.) by reading, will be easy to find out further feature of the present invention and advantage:
Fig. 1 is electrical schematic diagram, and local is module map, and according to elaboration of the present invention, this schematic diagram directly to provide the schematic diagram of electric power for fluorescent lamp holder to the power pins of LED.
Fig. 2 and Fig. 1 is similar, but provides the schematic diagram of electric power for four power contacts of fluorescent lamp holder.
Fig. 3 and Fig. 4 is electrical schematic diagram, and local is module map, and according to elaboration of the present invention, this schematic diagram is that fluorescent lamp holder comprises the electronic ballast for fluoresent lamp of respective type and the schematic diagram of LED.
Fig. 5 is the electrical schematic diagram of LED lamp circuit shown in Fig. 1-4.
Fig. 6 and Fig. 7 is the electrical schematic diagram of the first-selected LED circuit of the LED of arrangement shown in Fig. 5.
Fig. 8 and Fig. 5 is similar, but Fig. 5 does not comprise employing one to be conducted between control member by second circuit and first and second and frequency of operation is the isolating transformer of ballast frequency.
Fig. 9 and Fig. 8 is similar, but Fig. 8 does not comprise employing one to be conducted between control member by second circuit and first and second and frequency of operation is the autotransformer of ballast frequency.
Figure 10 is the electrical schematic diagram of LED power, comprises the high-frequency isolation transformer between electric power input and output.
Figure 11 is the electrical schematic diagram of LED power, does not comprise the parts of isolation electric power input and output.
Figure 12,13 and 14 is shown in by Fig. 1-4 electrical schematic diagram of circuit in LED, can select as the another kind of Fig. 5.
Figure 15 part is perspective diagram, and part is electrical schematic diagram, illustrates the layout of LED risk of shock test.
Figure 16 illustrates the various electrical schematic diagrams of the alternate embodiment of the control member of conduction shown in Fig. 5 and Figure 12-14 in a tabular form, and provides other qualificationss for these embodiments.
Embodiment
The example mentioned in detailed description and drawing are only citing use, are not construed as limiting any the scope of the claims or explanation.
Definition
In this specification and accessory claim, applicable to give a definition:
" active element " refers to a controlled electronic component, can supply controllable energy with voltage or current system to the circuit containing active element.Such as, transistor.
" active circuit " refers to a kind of circuit, and it contains the control loop of feedback and active component by one, restriction load current.
" passive component " refers to an electric component, and it cannot provide outside controlled energy with the form of voltage or electric current to the circuit comprising passive component.The example of passive component has rectifier diode, LED diode, resistance, electric capacity, inductance and frequency of operation to be the magnetic ballast of 50 or 60 hertz.
" passive circuit " refers to a kind of circuit, does not comprise defined active element here.
" electronic ballast for fluoresent lamp " or similar device refer to a kind of ballast of instantaneous starting, the ballast started fast, and other use switching type power supplies such as the ballast that program starts realize the ballast of fluorescent lamp current limliting." electronic ballast for fluoresent lamp " does not comprise so-called magnetic ballast.
" power line " refers to conductor interchange or direct current being supplied to terminal use.The frequency of the alternating current provided is usually between 50 to 60 hertz, and usual effective value voltage is 100 to 344 volts.The power supply that special power line provides is 400 hertz.Herein power line frequency be zero correspondence for DC power supply.
For " isolation " transformer herein, not turn ratio is limited in 1:1.
Other define the citing seen below to " conduction control member " and term " permission " and describe.
Fluorescent lamp holder
Fig. 1 shows the standard fluorescent lamp lamp bracket 100 of slender type LED 102.Fluorescent lamp holder 100 provides electric power from power supply 109 to the first and second power pins 104 and 106 respectively by contact point of power source 105 and 107.Contact point of power source 125 is not connected with 127 and cannot receives main power source, patches the third and fourth power pins 124 and 126 respectively and carries out machinery support to it.First circuit 110 comprises LED supply module, the electric power for LED300 in driving LED lamp 102 that electric supply 109 provides, such as, can limit the electric current leading to LED.LED 102 also comprises second circuit 140, and not using in FIG is because second circuit 140 is to obtain electric power from electronic ballast for fluoresent lamp, not using ballast in Fig. 1.
Power supply 109 may be an alternating current source, and its general supply frequency is 50 or 60 hertz or 400 hertz.Power supply 109 also may be a DC power supply, and in this case, supply frequency is considered to zero.
See Fig. 1 again, first and second power pins of LED 102 one end and the 3rd power pins 124 of the other end are considered in the invention of this application protection.As shown in Figure 1, the first power pins 106 and the 3rd power pins 124 occur axially displaced, and this point is unimportant; They also can axially align each other.The second circuit 140 of LED 102, not for Fig. 2, is because second circuit 140 is to obtain electric power from electronic ballast for fluoresent lamp, not using this ballast in fig. 2.
Fig. 2 and Fig. 1 is similar, shows that standard fluorescent lamp lamp bracket 115 provides electric power by power supply 109 to four power pins 104,106,124 and 126 of LED 102.Power line transmits electric power respectively by contact point of power source 125 and 127 to third and fourth power pins 124 and 126 of fluorescent lamp holder 115.First circuit 110 comprises a LED power, and it can affect the electric power that power supply 109 provides for the LED300 in LED 102, such as, can limit the electric current leading to LED.Compared with the fluorescent lamp holder 100 of Fig. 1, if LED 102 is installed to fluorescent lamp holder 115 in the other direction, power line will be transmitted electric power by contact point of power source 125 and 127 to first circuit 110.
Fig. 3 shows the fluorescent lamp holder 120 of a standard, comprises instantaneous starting type electronic ballast for fluoresent lamp 122, and according to Fig. 1 or Fig. 2, it is transmitted electric power to the LED300 in LED 102 by second circuit 140.Second circuit 140 passes through the power pins at the relative two ends of lamp, by the frequency reception power supply of instantaneous starting type electronic ballast for fluoresent lamp 122; The first circuit 110 in this and Fig. 1 and Fig. 2 receives power supply by a pair power pins 104 and 106 of LED 102 the same side and forms distinct contrast.In figure 3, the electric power in electronic ballast for fluoresent lamp 122 flows to LED 102 by contact point of power source 107 by second source pin 106, flows to LED 102 by contact point of power source 127 by the 3rd power pins 124.Second source pin 106 and the 3rd power pins 126 lay respectively at the opposite end of lamp.Conveniently, when using instantaneous starting type electronic ballast for fluoresent lamp 122, contact point of power source 105 and 107 may be short-circuit 108 short circuits and link together, and contact point of power source 125 and 127 also may be short-circuit 128 short circuits and link together.As shown in the figure, the 4th power pins does not need to be connected in the circuit of lamp.
Fig. 4 shows standard fluorescent lamp lamp bracket 130, and the electronic ballast for fluoresent lamp 122 wherein comprised is different from instantaneous starting type electronic ballast for fluoresent lamp 122 (Fig. 3).Seen by example, electronic ballast for fluoresent lamp 123 (Fig. 4) may be quick-starting direct or program actuated type.As shown in Figure 3, fluorescent lamp holder 130 provides electric power to shown in Fig. 1 or Fig. 2 with the LED 300 of identical LED by second circuit 200.Compare with 115 with the fluorescent lamp holder 100 of Fig. 1 with Fig. 2, second circuit 200 receives electric power by different power pins.The main distinction between fluorescent lamp holder 120 (Fig. 3) and 130 (Fig. 4) is, fluorescent lamp holder 130 is that each power pins 104,106,124 and 126 each provides independent conductor.Give an example, with regard to the fluorescent lamp holder 130 of quick-starting direct or program actuated type, usually can use independent conductor.
It should be noted, to the description of identical LED 102, when by when being directly connected on power line shown in Fig. 1 or Fig. 2, use the first operator scheme to describe; When by when being realized by electronic ballast for fluoresent lamp 122 Fig. 3 or 4 Suo Shi, then describe by the second operator scheme.
LED lamp circuit
Fig. 5 shows the situation of the circuit 200 of the LED 102 that Fig. 1-4 above describes.Circuit 200 comprises the first circuit 110 and second circuit 140, they can provide power supply for LED300, but following condition need be met, namely whether employ (a) fluorescent lamp holder 100 (Fig. 1) or fluorescent lamp holder 115 (Fig. 2) or (b) fluorescent lamp holder 120 (Fig. 3) or 130 (Fig. 4).The LED300 shown in Figure 5 is the LED of single string series connection, and wherein " string " refers to and have a LED at least.The LED300 of series connection can by conventional skill, by the one or more parallel connection of LED strip (b) of (a) one or more parallel connection and the LED strip of series connection, or the combination of (c) above topology (a) and (b) is replaced.The LED300 that first-selected LED circuit 303 and 304 comprises respectively as shown in Figure 6 and Figure 7.
Electrolytic capacitor 324 shown in second circuit 140, can share with the first circuit 110.Or if be connected between node 308 and electrolytic capacitor 324 by an optional blocking diode 325, when the first circuit 110 provides electric power for LED300, the first circuit 110 does not just need this capacitor.Present inventor finds after deliberation, is having in some embodiments, and the first circuit 110 can not charge completely for the electrolytic capacitor 324 that electric capacity is relatively large, and this is caused by the flicker of LED300.Blocking diode 325 can provide the device of unidirectional current to form by p-n diode or another, such as Schottky diode or silicon controller rectification (controllable silicon, SCR).According to above statement " corresponding element has corresponding Ref. No. ", the blocking diode 325 that other drawings (as Fig. 5,12 and 13) describe is identical with description above.If the alternative energy source of driving LED 300 can be provided to store, electrolytic capacitor 324 just can be cancelled need not.Give an example, alternative energy source storage like this can be another electrolytic capacitor on the electrolytic capacitor of electronic ballast for fluoresent lamp 122 (Fig. 3) or 123 (Fig. 4) or the first circuit 110 (Fig. 5).If cancel electrolytic capacitor 324, as described above, likely cause LED300 occurrence frequency to be the flicker of ballast frequency, likely can cause barcode scanner fault.
LED circuit 303 shown in Fig. 6 for realizing LED300, and is connected with the node on the circuit 200 of Fig. 5: node 306 and 308 is positioned at top, and node 310 and 312 is positioned at bottom.LED300 in Fig. 6 with turn to diode 314,315,316,317 and 320 to be interconnective.When LED has identical electric pressure, two serial numbers of LED300 display are equal.When this is to prevent from being powered by the first circuit 110, there is significant difference in the electric current of being gone here and there by each LED300.Turn to diode the device of unidirectional current can be provided to be formed by p-n diode or another, as Schottky diode or silicon controller rectification (controllable silicon).
When LED300 is powered by the first circuit 110 (Fig. 5), diode 314,315,316 and 317 is turned to carry out electric current conduction, owing to turning to diode 320 to be reverse biased, so do not carry out electric current conduction.So just result in two string LED300 to be operated in parallel.The quantity of each LED300 string is 20, and each LED rated voltage is about 3 volts, and the voltage that the first circuit 110 between node 306 and 310 produces is approximately 60 volts of direct currents.Give an example, this type of voltage effectively can produce in the whole typical range of main power source 109 (Fig. 1-4), usually with effective value voltage from 100 to 300 volts not etc.
On the other hand, when the LED300 in the LED circuit 303 of Fig. 6 is powered by second circuit 140 (Fig. 5), provide electric current just can to continuously the LED300 of two series connection string; That is, going here and there from node 308 to the LED300 in left side, then by turning to diode 320 to be passed down through right side LED300 string, finally arriving node 312.When LED300 is powered by second circuit 140, diode 314,315,316 and 317 is turned to be nonconducting.As described above, the quantity of a string LED is 20, about 3 volts of the rated voltage of each LED, and when LED300 carries out series-fed by second circuit 140, the voltage that the second circuit 140 between node 308 and 312 produces is approximately 120 volts of direct currents.Such as, this type of voltage raised, provides electrical load by electronic ballast for fluoresent lamp to second circuit 140 again conversely, suitable with the fluorescent lamp of typical 600 millimeters.This type of voltage is approximately the twice that the first circuit 110 provides voltage.
The operation of second circuit 140 in high voltage situation reduces the levels of current of second circuit 140; The levels of current reduced can reduce again second circuit 140 electric current causes fatal electric shock potential threat to personnel.Therefore, the UL risk of shock test request of the electronic ballast for fluoresent lamp described in UL1598c standard and UL935 standard can be met in the U.S., electronic ballast for fluoresent lamp has instantaneous starting type 122 (Fig. 3) or quick-starting direct or other types 123 (Fig. 4), comprise the ballast that some are more old-fashioned, its operating power is all low to moderate 25 kilo hertzs.UL is also referred to as the laboratory of insurance company, and general headquarters are located at the U.S..If do not operate second circuit 140 under high-pressure situations, as previously stated, the new-type ballast operation frequency that can meet in the shock hazard test and UL935 standard described in UL1598c standard is the condition of 45 kilo hertzs, but usually can not meet the shock hazard test of old-fashioned ballast, as previously mentioned, its frequency of operation is about 25 kilo hertzs.
When second circuit 140 operates in high voltage situation, particularly undertaken powering by instantaneous starting type electronic ballast for fluoresent lamp 122 (Fig. 3), also need to take more effective means to operate electronic ballast for fluoresent lamp.In various embodiments, allow second circuit 140 to run in high voltage situation, and use the electric current of one or more couple capacitors LED300 to limit, make it less, more economical; This advantage will hereafter discussed.
What hereafter described by Fig. 6 before mainly mentioning goes here and there about left side and right side LED300, the conventional technical ability that those of ordinary skill can adopt: anyly single ledly can replace with two or more parallel connection LED.
The LED circuit 304 of Fig. 7 display can ensure that second circuit 140 operates under higher voltage condition, when operating electronic ballast for fluoresent lamp, easily can meet electric shock test request described below, and can more effective operation electronic ballast for fluoresent lamp.In various embodiments, for example, the electrical load that provides of LED circuit 304 can with different capacity, the fluorescent lamp of magnitude of voltage is higher 900 millimeters or 1200 millimeters is compatible.In addition, in an embodiment, circuit 304 can reduce size and the expense of current limiting capacitance in various situation, below we also can speak of, when LED300 is powered by the first circuit 110, can also low-voltage parallel operation be carried out.LED circuit 304 comprises two more suitably identical LED circuit unit 326 and 327.
On the left of LED circuit unit 326, LED300 as shown in Figure 7 two series connection and relevant turn to diode 314,315,316, the LED circuit 303 shown in 317 with 320 with Fig. 6 is identical.LED circuit unit 326 also comprises and turns to diode 318,319 and 321 in addition, and relevant LED300 string.When LED300 is powered by the first circuit 110, diode 318 and 319 is turned to conduct electricity; Diode 321 is turned to be reverse biased, so non-conductive.In the above example, each serial number of LED is 20, and each LED has the rated voltage of 3 volts, when the first circuit 110 (Fig. 5) is powered for LED, the effective value voltage that first circuit 110 produces through each series connection of LED300 is approximately 60 volts, between the series connection of the LED300 node 306 and 310 in LED circuit unit 326.
When the LED300 that second circuit 140 (Fig. 5) is the LED circuit unit 326 in Fig. 7 powers, turn to diode 320 and 321 by shown 3 LED strip, carry out the continuous conduction of electric current.Each string has 20 LED, and the rated voltage of each LED is approximately 3 volts, is about 180 volts by the series voltage of three LED strip.Turn to diode 314,315,316,317,318 and 319 now non-conductive.When operating second circuit 140 in high voltage situation, the advantage above described in two sections can be realized.
As shown in Figure 7, the LED circuit unit 327 on the LED circuit 304 in application drawing 7 and the operation LED circuit unit 326 just described are identical.That is, when mentioning LED circuit unit 327, when turning to diode 328,329,330,331,332,333,334 and 335, its function, with when mentioning circuit unit 326, turns to diode 314,315,316,317,318,319,320 to be the same with 321.Low-power LED (as about 9 watts) may need to get rid of LED circuit unit 327, and high-capacity LED lamp (as about 18 watts) then should comprise LED circuit unit 327.In either case, second circuit 140 provides the direct current of about 180 volts all in the above example, each LED strip connection has 20 LED, and the rated voltage of each LED is about 3 volts, this fluorescent lamp be more suitable for length is 900 millimeters or 1200 millimeters is transformed.
Present inventor finds after deliberation, and when second circuit 140 substantially exceeds the first circuit 110 for voltage that LED300 powers, the operation of second circuit 140 will produce various negative effect.These negative effects comprise the overtension being applied to the first circuit 110 assembly, likely can more than the rated voltage of the first circuit 110 assembly.So can cause by one or more diode 314-321 and 328-335 that turn to of the LED circuit 304 of Fig. 7 the reverse leakage current be harmful to.This harmful reverse current likely causes LED300 not luminous, or is interrupted flash of light once in a while, or sends brighter flash of light once in a while.There is example to find, when the voltage of node 307 to 311 occurs reverse biased and reaches harmful water at ordinary times, likely cause the setting voltage value of the first circuit 110 assembly too high, the non-luminous phenomenon of part or all of LED300.In order to avoid above-mentioned negative effect, when second circuit 140 intends to power for LED300, the first circuit 110 will be isolated with the monopolar current of being come second circuit 140 by LED300.
First circuit 110 and the monopolar current being entered second circuit 140 by LED300 are carried out the first-selected means of isolating, one or more modes following can be selected: the n channel type interface field-effect transistor 337 (hereinafter referred to as " field-effect transistor ", FET) on (a) first conductor 339 between node 306 and LED circuit unit 326 is connected with the first conductor 339; B () p channel type field-effect transistor between node 310 with LED circuit unit 326 and the second conductor 344 are connected.Field-effect transistor 337 and 342 is interfaces of the first circuit 110 and LED300, so be called as " interface " field-effect transistor.Field-effect transistor 337 and 342 occurs biased due to bias circuit 340 and 345, when voltage is reached for through node 306 and 310 predetermined value that LED300 powers, can cause with the conduction of the frequency of direct current or approximate DC by these field-effect transistors, otherwise occur opaque phenomenon.Above the LED300 that Fig. 7 mentions example in, the predetermined voltage of driving LED 300 is approximately 60 volts.For those skilled in the art, based on above-mentioned standard, the bias circuit 340 and 345 of perception first circuit 110 builtin voltage is a kind of conventional means.
Field-effect transistor 337 and 342 is furnished with body diode usually, allows various frequency current to pass through along a direction.This type of body diode for field-effect transistor 337 and 342 can be shown as diode 338 and 343 respectively; When diode 338 and 343 is in nonconducting state, following target can be realized: the rated output voltage that prevents second circuit 140 from obtaining from node 306 to 310 from the voltage that node 306 to 310 obtains higher than the first circuit 110 (about 60 volts that mention as example above); And prevent second circuit 140 from being negative value from the voltage that node 306 to 310 obtains.But, because body diode 338 and 343 allows the unidirectional conduction of alternating current source, shown in Fig. 3 and Fig. 4, field-effect transistor 337 and 342 can carry out Bidirectional Conduction respectively according to the frequency of electronic ballast for fluoresent lamp 122 or 123 (hereinafter referred to as " ballast frequency "), frequency is usually at about 45 kilo hertzs, and more broadly scope is from 20 kilo hertzs to 100 kilo hertzs.So carry out charging with limiting capacitance device in the first circuit 110 and cause LED300 to be interrupted flash of light once in a while, or send brighter flash of light once in a while, simultaneously also in order to prevent the alternating current of unidirectional conduction from causing charge buildup and harmful high voltage.For this reason, be preferably interface field-effect transistor 337 and configure by-pass capacitor 341, for interface field-effect transistor 342 configures by-pass capacitor 346.Thus, just can ensure electric current by ballast frequency defined above via Bidirectional Conduction by interface field-effect transistor 337 and 342, thus reach this section of previously mentioned target.Similar by-pass capacitor (not shown) is also applicable to by-pass current by ballast frequency through field-effect transistor, and diode or similar device can press the conduction of ballast frequency by unidirectional block electric current.
Present inventor finds after deliberation, and in certain embodiments, desirable state is all cascaded at above-mentioned partition method and the first conductor 339 and the second conductor 344; When so can prevent second circuit 140 from powering to LED, electric current carries out leaking from the first circuit 110 to LED300 and causes LED300 not stop flicker.But in other embodiments, such as, the flicker that LED occurs once in a while or brighter scintillation negligible, the first circuit 110 can be isolated by means of only a spacer assembly on the first conductor 339 or the second conductor 344 and LED300.
The above-mentioned spacer assembly about LED circuit 304 can change to some extent, available p road field-effect transistor, bipolar junction transistor or controllable silicon, or mechanical switch replaces n road field-effect transistor 337.Another kind of change substitutes p road field-effect transistor 342 similarly with n road field-effect transistor, bipolar junction transistor, controllable silicon or mechanical switch.
By referring in Fig. 6 and Fig. 7 to the description of LED circuit 303 and 304, draw and can add one or more extra LED300 to each unit in LED circuit unit 326 and 327, such as to turn to diode 318,319 and 321 relevant LED300 go here and there, this is all apparent for the person of ordinary skill of the art.When maintain provide identical voltage by the first circuit 110 by node 306 and 310 time, improve second circuit 140 is supplied to LED voltage by node 308 and 312 further.
One or more LED circuit unit can be added, such as LED circuit unit 327 to the LED circuit 304 in Fig. 7.This just allows repacking fluorescent lamp efficiently can reequip with longer (such as 1500 millimeters, 1800 millimeters, 2400 millimeters or longer) fluorescent lamp, also allows the low cost LED distribution in LED more intensive, to obtain evenly illumination profile.
Or with reference to Fig. 5, circuit 200 comprises the first conduction control member 350 and the second conduction control member 370, and their function comprises permission first and second circuit 110 and 140 independent operating.When LED is inserted in the fluorescent lamp holder with electric power connector socket (not shown), during to transmit electricity electric power to the power pins supply of described lamp, the first conduction control member 350 and the second conduction control member 370 also can be used for reducing the life-threatening electric shock possibility of possibility.
When using fluorescent lamp holder 100 or 115 of Fig. 1 or Fig. 2 respectively, power supply 109 is wherein powered directly to the first and second power pins 104 and 106 by power transmission line, and the first circuit 110 modulates the electric power of driving LED 300.First circuit 110 comprises the LED power shown in Fig. 1 and Fig. 2.Non-isolated and electric isolution power supply are all regarded as the first circuit 110.
The circuit 380 that Fig. 8 shows is except comprising as previously mentioned with except the isolating transformer 382 of ballast frequency operation between the rectification circuit 282 and the first and second conduction control members 350 and 370 of second circuit 140, similar to the circuit 200 in Fig. 5.The transformation ratio of transformer 382 is selected to provide another kind of mode to realize as previously mentioned about the exemplary electrical voltage levels of LED circuit in Fig. 7 304.So from right to left the transformation ratio of transformer 382 is set to 3:1 in fig. 8, the first and second circuit 110 and 140 can be powered to LED300 with the voltage of about 60 volts.But, after there is such transformation ratio, electronic ballast for fluoresent lamp 122 in earlier figures 3 or the electronic ballast for fluoresent lamp 123 in Fig. 4 just can provide the voltage of about 180 volts to transformer 382, and as shown in the embodiment in Fig. 6 and Fig. 7, more easily test by getting an electric shock and realize as above about the more high efficiency described in Fig. 6 and Fig. 7.This embodiment avoids when aforementioned LED is powered by the second circuit 140 intending powering, use insulating element, such as, interface field-effect transistor 337 and 342 in Fig. 7 isolates the first circuit 110 and the monopolar current coming from LED300.The transformation ratio of adjustment isolating transformer 382, such as, select 2.8:1 but not 3:1, and circuit designers perhaps can be allowed to make embodiment become more efficient or safety.On the other hand, transformer takies larger space than the aforementioned insulating element used in Fig. 7 embodiment usually.
LED300 on circuit 380 in Fig. 8 outside shown wall scroll LED, may preferentially comprise many parallel connection LEDs.Many parallel connection LEDs are used along with the increase of LED 102 length, can suitably to provide corresponding illumination.
Fig. 9 display circuit 390 is except substituted for except isolating transformer 382 (Fig. 8) with autotransformer 392, similar to the circuit 380 in Fig. 8.Conductor 394 bottom autotransformer 392 provides the current circuit path conducting control member 350 from the rectification circuit 282 to the first of second circuit 140; On the other hand, compared with the isolating transformer (in such as Fig. 8 382) of similar capacity, autotransformer usually more efficient, small and exquisite, be easier to build and cost less.The transformation ratio of transformer 392 is selected to provide another kind of mode to realize as previously mentioned about the exemplary electrical voltage levels of LED circuit in Fig. 7 304.So from right to left the transformation ratio of transformer 392 is set to 3:1 in fig .9, the first and second circuit 110 and 140 can be powered to LED300 with the voltage of about 60 volts.But after having such transformation ratio, the electronic ballast for fluoresent lamp 122 in earlier figures 3 or the electronic ballast for fluoresent lamp 123 in Fig. 4 just can provide the voltage of about 180 volts to transformer 382; And as shown in the embodiment in Fig. 6 and Fig. 7, when running from electronic ballast for fluoresent lamp more easily by experiment of getting an electric shock, and the realization that is in operation is as above about the more high efficiency described in Fig. 6 and Fig. 7.This embodiment avoids when aforementioned LED is powered by the second circuit 140 intending powering, use insulating element, such as, interface field-effect transistor 337 and 342 in Fig. 7 isolates the first circuit 110 and the monopolar current coming from LED300.The transformation ratio of adjustment autotransformer 392, such as, select 2.8:1 but not 3:1, and circuit designers can be allowed to make embodiment become more efficient or safety.
LED300 on circuit 390 in Fig. 9 outside shown wall scroll LED, may preferentially comprise many parallel connection LEDs.Use many parallel connection LEDs can along with the increase of LED 102 length, ground provides corresponding illumination.
Figure 10 shows the isolation LED power 220 on a kind of first circuit 110 of conventional LED 102 (Fig. 1-4), it receives transmission of electricity electric power in the first and second power pins 104 and 106, and the LED300 to Fig. 5 on output 222 and 224 provides modulation electric power.Power supply 220 is off-line type isolation flyback LED drive circuit, comprises an isolating transformer 228." isolation " means and just sufficiently limits conduction by transformer with the grid frequency being less than 10 milliamperes.As previously mentioned, isolating transformer 228 runs with ballast frequency usually.Aforesaid restriction defines isolated form transformer type cited herein.Aforesaid power supply 220 comprises traditional full-wave rectifying circuit 230, field-effect transistor (FET) 232, and exports flyback diode 240 and capacitor 242.The signal being applied to grid 233 carrys out controlling filed effect transistor 232 in a way known.
When running the LED 102 in the fluorescent lamp holder 100 (Fig. 1) or 115 (Fig. 2) of being powered by the first circuit 110, the isolating transformer 228 in Figure 10 is used to be conducive to reducing electric shock risk.Why this can realize being because the isolating transformer 228 in such as Fig. 5 provides the current path isolation between the first and second power pins 104 and the 106 to the first and second conduction control members 350 and 370.Similarly, the isolating transformer 382 in Fig. 8 is isolated to achieve current path with the same mode described in the aforementioned sentence run about the isolating transformer 228 in Figure 10.
About the LED how using series and parallel connections in Fig. 6 and Fig. 7, or how to use the isolating transformer 382 in Fig. 8, or how to use the autotransformer in Fig. 9 can, with the voltage driven LED300 higher than the first circuit 110, have a kind of preferred scheme available to allow second circuit 140.Aforementioned preferred version configures the first circuit 110 exactly, with the voltage driven LED300 that same second circuit 140 applied voltage is roughly the same.The circuit of this preferred version can realize with routine techniques.Such as, the isolating transformer 228 in Figure 10 in insulating power supply 220 can be configured, allow it have can to improve the transformation ratio of the voltage on secondary coil that transformer is connected with 224 with output 222.More particularly, aforementioned transformation ratio can be selected, allow the first circuit 110 with the voltage driven LED300 roughly the same with second circuit 140 applied voltage.About the embodiment of Fig. 6 and Fig. 7, this preferred version embodiment avoids and uses turn to diode (such as 314 and 316) and insulating element, such as, interface field-effect transistor 337 and 342 in Fig. 7 for realizing aforementioned object.About the embodiment in Fig. 8 and Fig. 9, aforementioned preferred version embodiment avoids and uses the transformer shown in earlier figures.
Figure 11 illustrates the non-isolated LED power 250 on a kind of first circuit 110 of conventional LED 102 (Fig. 1-4), it receives electric power from power transmission line in the first and second power pins 104 and 106, and the LED300 to Fig. 5 on output 222 and 224 provides modulation electric power.Power supply 250 is off-line type step-down LED drive circuit, comprises traditional full-wave rectifying circuit 230, field-effect transistor (FET) 252, the capacitor 254 of synthetic operation, inductor 256 and capacitor 258.Diode 260 is high speed recovery diode.The signal being supplied to the grid 253 of field-effect transistor 252 carrys out controlling filed effect transistor 252 by a kind of known mode.
As shown in the figure, by-pass capacitor 262 is connected to allow electric current to pass through with ballast frequency with 263 through the selected diodes of full-wave rectifying circuit 230, thus the charging of capacitor (such as capacitor 254 and 258) of limit first circuit 110 of powering to LED at second circuit 140 described above.The charging of aforementioned capacitor can cause fragmentary flash of light or the fragmentary flash of light brighter than LED300.Except using by-pass capacitor 262 and 263, the by-pass capacitor 264 and 265 shown in dotted line can also be used in and substitute.Except using by-pass capacitor 262 and 263, by-pass capacitor 262 and 264 can also be used, or use by-pass capacitor 264 and 265 to substitute.
In addition, use whole four capacitors (i.e. capacitor 262,263,264 and 265) may preferably, especially for indivedual electronic ballast for fluoresent lamps 122 or 123 of some type in Fig. 1 and Fig. 2 preferably.Such as aforementioned capacitor configuration can be lowered through respective diode and carry out the asymmetric of common mode conduction, and aforementioned asymmetric meeting causes the first circuit 110 to make harmful act.
The LED power 220 and 250 of aforementioned Figure 10 and Figure 11 is with citation form display, and representative is isolated and non-isolated LED power.A lot of settings that other are applicable to of isolation and non-isolated LED power are all apparent for the person of ordinary skill of the art.Other operational insulating power supplies have: basic circuit of reversed excitation, boosting circuit of reversed excitation, the step-up/step-down circuit increasing isolation or forward converter.Other operational non-isolated power supplys have: step-up/step-down circuit, booster circuit, mound gram circuit or sepic converter (SEPIC) circuit.
As shown in Figure 10 and Figure 11, such as, isolation and non-isolated LED power 220 and 250 generally include the active electrical component of field-effect transistor 232 or 252.So according to above definition, LED power 220 and 250 can include source circuit.
Get back to the circuit 200 of Fig. 5, second circuit 140 can be aforesaid simple passive circuit usually.In an illustrated embodiment, such as, second circuit 140 mainly comprises the rectification circuit 282 formed by full wave diode bridge.Rectification circuit 282 can be formed by other topologys a lot, such as half-wave bridge or voltage multiplie.
Use and be respectively used to rely on directly transmission of electricity operation power and the first and second circuit 110 and 140 (Fig. 5) relying on the existing fluorescent lamp town device be connected with lamp bracket to run, can various advantage be produced.Except the efficiency mentioned in aforesaid summary of the invention and advantage economically, installation personnel has had more more options when mounted LED lamp.Such as in schoolhouse, installation personnel can determine again to change fluorescent lamp ballast in classroom, then directly uses power transmission line, to increase the efficiency of opto-electronic conversion.In other regions of schoolhouse, such as, in the emergency lighting of little classroom or corridor, installation personnel can determine, relies on existing fluorescent lamp ballast to carry out running indicator, on the whole more economically.This is because the lamp bracket in these places just uses once in a while, compared with the existing electronic ballast for fluoresent lamp of use, the lamp bracket again changing these places will spend more.In addition, if fluorescent lamp ballast operationally breaks down, again can change the lamp bracket in ballast, then run same lamp from power transmission line.
In addition, the first and second circuit 110 and 140 (Fig. 5) are preferably active circuit and passive circuit respectively, and these terms as previously mentioned, thus allow aforesaid more high-effect, and stable operation more broadly.Especially each circuit can be optimized, and is worked most effectively by respective power supply.
Figure 12 illustrates alternative circuit 1200 in the LED 102 of aforesaid Fig. 1-4.Circuit 1200 has similar elements with the circuit 200 of Fig. 5, and has identical Ref. No..Main difference is, the LED of second circuit 140 only for being accessed to a part by node 1202 and 1204 is powered.Node 1202 can be positioned at other positions, the top of such as LED300.Similarly, node 1204 can be positioned at other positions, the bottom of such as LED300.When utilizing the non-isolated LED power 250 of the isolation LED power 220 of Figure 10 or Figure 11 to implement the first circuit 110, the value of capacitor 242 (Figure 10) or capacitor 258 (Figure 11) should be selected as follows.The value that the value of aforementioned capacitor 242 or 258 should contact the electrolytic condenser 324 of Figure 12 makes a choice, and provides enough power storage, to produce acceptable low flicker level with LED running frequency.
Powered by the LED300 allowing second circuit 140 only be powered by the first circuit 110 to a part, the designer of circuit can select only to optimize one or both optimization simultaneously to a greater degree between the first and second circuit 110 and 140.
Figure 13 shows further alternative circuit 1300 in the LED 102 of aforesaid Fig. 1-4.Circuit 1300 has similar elements with the circuit 200 of Fig. 5, and has identical Ref. No..Main difference is, the LED of the first circuit 110 only for being connected to a part by node 1302 and 1304 is powered.Node 1302 can be positioned at other positions, the top of such as LED300.Similarly, node 1304 can be positioned at other positions, the bottom of such as LED300.When utilizing the non-isolated LED power 250 of the isolation LED power 220 of Figure 10 or Figure 11 to implement the first circuit 110, the value of capacitor 242 (Figure 10) or capacitor 258 (Figure 11) should be selected as follows.The value that the value of aforementioned capacitor 242 or 258 should contact the electrolytic condenser 324 of Figure 13 makes a choice, thus provides enough power storage with LED running frequency, to produce acceptable low flicker level.
Powered by the LED300 allowing the first circuit 110 only be powered by second circuit 140 to a part, the designer of circuit can select only to optimize one or both optimization simultaneously to a greater degree between the first and second circuit 110 and 140.Such as, when using instantaneous starting type electronic ballast for fluoresent lamp 122 (Fig. 3), more easily the electric current of LED300 is led in restriction.This is because, can higher than from the LED300 of the first circuit 110 node 1202 and 1204 voltage used from second circuit 140 to whole LED300 voltage used.
For example, the same with first circuit 110 of Fig. 5, first circuit 110 of Figure 11 and Figure 12 realizes by the isolation LED power 220 of Figure 10 or the non-isolated LED power 250 of Figure 11.
Figure 14 to show in the LED 102 of aforesaid Fig. 1-4 further alternative circuit 1400.Circuit 1400 has similar elements with the circuit 200 of Fig. 5, Figure 12 and Figure 13, and has identical Ref. No..Main difference is, is not to allow the first and second circuit 110 and 140 all only power to LED300, and the first circuit 110 is only powered to LED301, and second circuit 140 is only powered to LED302.The variation that above-mentioned LED300 is arranged also is applicable to LED301 and 302.This just completely eliminates above-mentioned worry, that is: when the first circuit is connected to transmission of electricity electric power by the first and second power pins 104 and 106, transmission of electricity electric power disturbs the predetermined running of the first circuit 110 by second circuit 140.
By allowing first circuit 110 of Figure 14 power to LED301, allow second circuit 140 power to LED302, the designer of circuit can select only to optimize one or both optimization simultaneously to a greater degree between the first and second circuit 110 and 140.Such as, when using instantaneous starting type electronic ballast for fluoresent lamp 122 (Fig. 3), more easily the electric current of LED302 is led in restriction.This is because, can higher than the voltage from the first circuit 110 for LED301 for the voltage of LED302 from second circuit 140.
First conduction control member can have function
Conduct control member 350 with reference to Fig. 5, Fig. 8-9 and Figure 12-14, the first and preferably play one or more following functions:
(1) second circuit is allowed to run.First conduction control member 350 can be used as capacitor to realize, such as, with aforesaid ballast frequency conduction." permission " second circuit herein runs and refers to, provides necessary but non-enough modes allow second circuit 140 run.In addition, the second conduction control member 370 also needs to allow second circuit to run, and in other words, the first and second conduction control members 350 and 370 are necessary, and need to be enough to second circuit 140 is run.
(2) allow second circuit to run, but do not disturb the first circuit.First conduction control member 350 also can play and allow second circuit 140 to run, but does not disturb the function of the predetermined running of the first circuit 110; Namely when the first circuit is connected to power delivery circuit by the first and second power pins 104 and 106.In order to realize this function, switch under conduction control member 350 is configured to capacitor or is positioned at off-state, thus when the first circuit 110 runs, limited by the electric current conduction to LED300 of the rectification circuit 282 of second source pin 106 and second circuit 140 from power transmission line.Compared with the average canbdle power of the similar LED produced with the first circuit 110 separately, this current limit from power transmission line prevents the first of LED300 or second great deviation of light.If add that imaginary lock 266 and 268, first circuit 110 is by isolated operation to the circuit of Fig. 5, Figure 12 and Figure 13.Following two kinds of deviations of light should be considered:
A) LED300 at 0.1 hertz to the flicker type deviation of light in 200 frequency range; And
B) the sustained deviation of light of LED300.
First great flicker type and sustained deviation of light account for 10%.In order to be down to minimum by irritating flicker type and sustained deviation of light, the second great flicker type and sustained deviation of light account for 5%.Measure luminous intensity widely know to calculate optical flare, the photocell constantly light that sends of measurement light source can be utilized.
(3) electric current of driving LED is limited.First conduction control member 350 can limit the electric current of driving LED 300 further according to actual conditions.Show than with the larger impedance of aforementioned ballast frequency when the first conduction control member 350 realizes as capacitor with transmission frequency, thus this function can be completed.From transmission frequency in the scope of 0 to 500 hertz, and ballast frequency can be judged at 20 kilo hertzs and the above fact, and transmission frequency is more much lower than ballast frequency.
(4) allow to reach Danger Electric shock risk protection.4th possible function of the first conduction control member 350 (with the collaborative second conduction control member) is, the fluorescent lamp holder (as: 100 in Fig. 1-2 is inserted as the mounted personnel of similar lamp 102 (Fig. 1-2), 115), time, allow to reduce the life-threatening Danger Electric shock risk of possibility.Figure 15 show carry out Danger Electric shock risk experiment for LED 102 arrange 1500, this arrange described in same UL1583c standard, to carry out arranging of similar experiment with reference to UL935 standard similar.There are the first and second power pins 105 and 106 lamp 102 one end, and there is the third and fourth power pins 124 and 126 another opposite end.The lamp socket 1510 of two pin linear fluorescent lamps comprises the first and second power contacts 1511 and 1512.Or any power contact of power contact 1511 and 1512 can invest on any power pins in power pins 104,106,124 and 126 as electricity folder.First power contact 1511 of lamp socket 1510 is connected to voltage source 1520 to ensure the alternating voltage corresponding to the bus voltage of needs.Voltage source 1520 can provide a voltage range, is represented by the arrow in voltage source 1520 tag mark.The second source contact 1512 of lamp socket 1510 is connected to the transmission of electricity neutral line of the ground connection of voltage source 1520.Another lamp socket 1530 can be positioned at comprise lamp socket 1510 equipment 1535 on, but do not use this lamp socket in current experiment.To intend carrying out every experiment to the bus voltage of the first circuit 110 power supply and frequency.For LED retrofit lamp, this mainly refer to the voltage range of the voltage that voltage source 1520 provides be alternating voltage root-mean-square value from 110 to 277 and the supply frequency of 50 or 60 hertz.If desired, experiment can be carried out on the fixed voltage of the independent power transmission line supply voltage suited the requirements.The personnel possessing this area common technology means generally understand other transmission of electricity supply voltage, such as alternating voltage root-mean-square values 347 or 480 of needs.This just will confirm the transmission of electricity supply voltage of any concrete installation for LED 102.
In Danger Electric shock risk experiment, for following often kind of situation, first and second conduction control members 350 and 370 can be exposed to outer power pins 104 as giving each of LED 102, 106, 124 and 126 capacitors configured or the switch under being positioned at off-state realize, thus by being directly connected to aforementioned each circuit being exposed between outer power pins and ground connection through electric probe 1540, (circuit comprises the first and second series elements 1550 and 1555, wherein, first element 1550 comprises 1500 ohm of noninductive resistors in parallel and 0.22 microfarad capacitor, second element 1555 comprises the noninductive resistor of 500 ohm) when measuring, default milliampere root-mean-square value is exceeded to transmission frequency, exceeding anyly needs supply voltage scope, frequency is the electric current conduction (I=V/R of 50 hertz and 60 hertz, Figure 15) stop:
(1) first and second power pins 104 and 106 inserts lamp socket 1510, thus the first power pins 104 is connected to power contact 1511, second source pin 106 is connected to power contact 1512, and electric probe 1540 is connected to power pins 124;
(2) first and second power pins 104 and 106 insert lamp socket 1510, thus the first power pins 104 is connected to the first power contact 1511, second source pin 106 is connected to second source contact 1512, and electric probe 1540 is connected to the 4th power pins 126;
(3) first and second power pins 124 and 126 insert lamp socket 1510, thus the 3rd power pins 124 is connected to the first power contact 1511,4th power pins 126 is connected to second source contact 1512, and electric probe 1540 is connected to the first power pins 104;
(4) first and second power pins 124 and 126 insert lamp socket 1510, thus the 3rd power pins 124 is connected to the first power contact 1511,4th power pins 126 is connected to second source contact 1512, and electric probe 1540 is connected to second source pin 106;
(5) first and second power pins 106 and 104 insert lamp socket 1510, thus second source pin 106 is connected to the first power contact 1511, the first power pins 104 is connected to second source contact, and electric probe is connected to the 3rd power pins 124;
(6) first and second power pins 106 and 104 insert lamp socket 1510, thus second source pin 106 is connected to the first power contact 1511, first power pins 104 is connected to second source contact 1512, and electric probe 1540 is connected to the 4th power pins 126;
(7) first and second power pins 126 and 124 insert lamp socket 1510, thus second source pin 126 is connected to the first power contact 1511,3rd power pins 124 is connected to second source contact 1512, and electric probe 1540 is connected to the first power pins 104;
(8) first and second power pins 126 and 124 insert lamp socket 1510, thus the 4th power pins 126 is connected to the first power contact 1511,3rd power pins 124 is connected to second source contact 1512, and electric probe 1540 is connected to second source pin 106.
When utilizing capacitor to realize any component in the first conduction control member and the second conduction control member 350 and 370, can according to (the two sections of beginnings are " electric current of (2) restriction driving LED described in leading portion and back segment.") value of optimum selecting capacitor carrys out further Limited Current.
Be any magnitude of voltage in 110 to 277 for alternating voltage root-mean-square value scope within the scope of aforesaid supply voltage, frequency be 50 hertz and 60 hertz time, it presets maximum root mean square milliampere value can be 10.Preset maximum milliampere root-mean-square value also can be preferably lower value, such as frequency be 50 hertz and 60 hertz time be 5.The meaning of each value representative is as shown in the table:
Famous American researcher charles Dalziel, using the healthy mankind as experimental subjects, is studied varying strength electric current by experiment to body effect, has been drawn aforementioned data.Circuit described in leading portion is used for stimulating the electric current of staff by UL (namely American insurance business tests institute), and staff touches LED etc. and is exposed to outer conductive circuit, so people just defines path with between ground connection.Presetting milliampere root-mean-square value is 10 in fact lower than the threshold value causing women " have pain, and voluntary muscle to be not controlled ", should leave the difference of 0.5 milliampere of root-mean-square value for security consideration.By comparison, the threshold value of the similar reaction of triggering male higher (i.e. 16 milliamperes of root mean square).Lose very dangerous to the control of voluntary muscle, for example, it may cause lamp installation personnel to throw from the ladder of 3 meters high.Lower default milliampere root-mean-square value 5 be U.S. UL selected when frequency is 60 hertz, meet the current value of U.S. UL1598c standard, U.S.'s UL1598c standard is formulated by UL, is intended to reduce the aforementioned possible life-threatening Danger Electric shock risk to LED installation personnel.From upper table, preset milliampere root-mean-square value 5 lower than the threshold value causing " have pain, and voluntary muscle being still controlled " to react, thus desirable.
Aforementioned UL1598s standard-required, with the frequency of 60 hertz, and must test with the frequency that electronic ballast for fluoresent lamp will produce.As previously mentioned, this type of ballast variable ratio frequency changer, general variable frequency range is 20 kilo hertzs to 100 kilo hertzs.As aforementioned table rear two column datas relatively shown in, frequency is higher, and the electric current that human body can bear is also higher.If because frequency is higher than aforesaid 50 hertz or 60 hertz, the electric current that human body can bear also can improve, so UL1598c regulation, if such as frequency is 25 kilo hertzs, allows electric current also far above aforesaid current demand values, be about 59 milliamperes of root mean square; If frequency is 50 kilo hertzs, about allowing electric current can reach 120 milliamperes of root mean square.
Second conduction control member can have function
Conduct control member 370 with reference to Fig. 5, Fig. 8-9 and Figure 12-14, the second and preferably play one or more following functions:
(1) second circuit is allowed to run.Such as, the second conduction control member 370 can be used as capacitor to realize conduction." permission " is herein consistent with the definition of conducting in control member function (1) first.
(2) allow second circuit to run, but do not disturb the first circuit.Second conduction control member 370 also can play and allow second circuit 140 to run, but does not disturb the function of the predetermined running of the first circuit 110; Namely when the first circuit is connected to power delivery circuit by the first and second power pins 104 and 106.In order to realize this function, switch under conduction control member 370 is configured to capacitor or is positioned at off-state, such as, when the first circuit 110 runs, limited by the electric current conduction to LED300 of the rectification circuit 282 of the 3rd power pins 124 and second circuit 140 from power transmission line.Such as, when utilizing the fluorescent lamp holder 115 of Fig. 2, transmission of electricity electric power is supplied to the 3rd power pins 124.Compared with the average canbdle power of the similar LED produced with the first circuit 110 separately, this current limit from power transmission line prevents the first of LED300 or second great deviation of light.If add that imaginary lock 266 and 268, first circuit 110 is by isolated operation to the circuit of Fig. 5, Fig. 8-9 and Figure 12-13.Need to consider following two kinds of deviations of light:
A) LED300 at 0.1 hertz to the flicker type deviation of light in 200 frequency range; And
B) the sustained deviation of light of LED300.
First great flicker type and sustained deviation of light account for 10%.In order to be down to minimum by irritating flicker type and sustained deviation of light, the second great flicker type and sustained deviation of light account for 5%.Measure luminous intensity widely know to calculate optical flare, the photocell constantly light that sends of measurement light source can be utilized.
(3) electric current of driving LED is limited.Second conduction control member 370 can limit the electric current of driving LED 300 further according to actual conditions.When the second conduction control member 370 shows than with the larger impedance of electronic ballast for fluoresent lamp 122 frequency as during capacitor with transmission frequency, thus this function can be completed.From transmission frequency in the scope of 0 to 500 hertz, and ballast frequency can be judged at 10 kilo hertzs and the above fact, and transmission frequency is more much lower than ballast frequency.
(4) allow to reach Danger Electric shock risk protection.One of second conduction control member 370 may function be, when the mounted personnel of similar lamp 102 (Fig. 1-4) insert fluorescent lamp holder (as: 100 in Fig. 1-4,115,120 or 130), allow to reduce the life-threatening Danger Electric shock risk of possibility.In order to realize this purpose, second conduction control member 370 configuration can conduct control member cooperation with first, with reference in above-mentioned paragraph from " (4) allow reach Danger Electric shock risk protection " paragraph by between " second conducts control member can have function " title.
Danger Electric shock risk is provided to protect---other technologies
The possible function of the aforementioned permission Danger Electric shock risk protection of the first and second conduction control members 350 and 370 in Fig. 5, Figure 12-13 and Figure 14, can also be realized by additive method.Such as, LED power is not isolated (such as compared with utilization, in Figure 11 250), isolating transformer 382 (Fig. 8) can be utilized or use insulating power supply (such as, in Figure 10 220), replace the former to be realized as capacitor or switch by the second conduction control member 370.Also when not running in the opposite direction with instruction of the present invention, and multiple component avoiding transmission of electricity power contacts any " being exposed to outer power pins " can be gathered." be exposed to outer power pins " is with to conduct first and second the meaning inquired in control member 350 and the prevention of electric shock function of 370 identical.
The Table List of the embodiment 1-13 of the first and second conduction control members
Figure 16 shows the embodiment 1-13 Table List of the first and second conduction control members.This Table List comprises isolation and the non-isolation type that a hurdle indicates the first required circuit 110 shown in Fig. 5, Fig. 8-9, Figure 12 and Figure 13.Another hurdle of this Table List refer to the fluorescent lamp holder 100 (Fig. 1) corresponding with each embodiment, 115 (Fig. 2), 120 (Fig. 3) or 130 (Fig. 4).Also have a hurdle to refer in each example, this embodiment, when powering to LED to throw light on along the length of LED 102, is shared above-mentioned LED, does not still share above-mentioned LED.Circuit 200 (Fig. 5), 380 (Fig. 8), 390 (Fig. 9), 1200 (Figure 12) and 1300 (Figure 13) share LED between the first and second circuit 110 and 140, and circuit 1400 (Figure 14) does not share LED between the first and second circuit 110 and 140.
Embodiment 1-13
For the whole embodiment 1-13 shown in Figure 16, according to following table, following first conduction controlling functions can be realized:
| The implementation of the first conduction control member 350 | The function of the first conduction control member 350 |
| Capacitor 352 | (1)–(4) |
| Switch 354 | (1) – (2) and (4) |
| Short circuit current 358 | (1) |
As this area is widely known, capacitor 352 more broadly can be called electric capacity." electric capacity " this more wide in range term contains and utilizes multiple capacitor to meet the requirements of electric capacity.
For the whole embodiment 1-13 shown in Figure 16, according to following table, following second conduction controlling functions can be realized:
| The implementation of the second conduction control member 370 | The function of the second conduction control member 370 |
| Capacitor 374 | (1)–(4) |
| Switch 376 | (1) – (2) and (4) |
| Short circuit current 372 | (1) |
The short circuit current 352 and 358 of the first and second conduction control members 350 and 370 is included in phrase " conduction control member " used herein.But " control " aspect of short circuit current 352 and 358 is but always conducted electricity.This is just formed with " control " of switch and contrasts, switch both can conducting also can not conducting.
In addition, the short circuit current 352 of the first conduction control member 350 needs the conduction that can realize between second source pin 106 and second circuit 140.Similarly, the short circuit current 358 of the second conduction control member 370 needs the conduction that can realize between the 3rd power pins 124 and second circuit 140.
For whole embodiment 1-13, according to following table, all will with reference to the Table List in Figure 16, content does not wherein repeat them here.For whole embodiment 1-13, need to sound a warning to the packing of product etc., the installation and removal that only just can carry out lamp when turning off the transmission of electricity power supply to fluorescent lamp holder is described.
Embodiment 1-2 and 11-13 possibly cannot reach the possible function of the Danger Electric shock risk protection of the first and second electric current conduction control members 350 or 370 inquired into above.This is because the first conduction control member 350 realizes as short circuit current 358 by embodiment 1,2 and 11-13.So, have these embodiments, above-mentioned the packing of product etc. is sounded a warning just particularly important.
Showing two kinds of the first and second conduction control members 350 and 370 about the embodiment 9 of circuit 1400 and 10, Figure 16 that all relate to Figure 14 may be in conjunction with.Or for example, the first and second conduction control members 350 and 370 of Figure 14 can also by implementing with regard to the same way shown in embodiment 5-8 with Figure 16.
About embodiment 5-10, although non-isolation type first circuit 110 that more suitable use is more not expensive, more expensive isolated form first circuit 110 also can be used.
With reference to Figure 11, the first and second conduction control members 350 and 370 realize as short circuit current 358 and 372 by embodiment 11.By avoiding the fluorescent lamp holder 115 (Fig. 2) providing transmission of electricity electric power to whole four power pins 104,106,124 and 126, and by allowing LED power show as isolated form in the first circuit 110, following advantage can be reached: no matter be the flicker type interference or sustained interference inquired into, second circuit 140 does not disturb the first circuit 110 above.
Embodiment 12 employs a kind of isolated form LED power in the first circuit 110, and avoid using provide transmission of electricity electric power to the fluorescent lamp holder 115 (Fig. 2) of whole four power pins 104,106,124 and 126, reach following advantage: no matter be the flicker type interference or sustained interference inquired into, second circuit 140 does not disturb the first circuit 110 above.
Using the first and second conduction control members 350 and 370 as in the embodiment 13 that short circuit current 358 and 372 realizes, rely on the LED do not shared, when powering to throw light on along the length of LED 102 to above-mentioned LED, reach following advantage: no matter be the flicker type interference or sustained interference inquired into, second circuit 140 does not disturb the first circuit 110 above.
With reference to Figure 16, switch 354 and 376 can be implemented in a variety of manners.They can form mechanical switch, and in the embodiment 8 of use two switches, preferably by two switches according to dotted line 400 mechanical couplings each other, thus control a switch and just control two switches.This mechanical switch is called as bipolar single-way switch.Switch 354 and 376 can also be configured to the electric switch of such as field-effect transistor, such as when no power for not on-state.
For the purpose of safety, need any Switch Controller installation personnel for realizing the first or second conduction control member 350 or 370 to be set to open mode or not on-state.Once installation personnel confirms lamp to be installed into fluorescent lamp holder 100 (Fig. 1) or 115 (Fig. 2), switch should stay open.By contrast, once installation personnel confirms lamp to be installed into fluorescent lamp holder 120 (Fig. 3) or 130 (Fig. 4), then switch should cut out.
As described in during as inquired into data above, when the LED300 in the circuit 200 of Fig. 5 realizes as is seen in fig. 6 or fig. 7, specification and the price of the capacitor 352 and 357 shown in Figure 16 can be reduced.
Below the Ref. No. and corresponding list of parts that use in this specification and accompanying drawing:
| Ref. No. | Parts |
| 100 | Fluorescent lamp holder |
| 102 | LED |
| 104 | First power pins |
| 105 | Power contact |
| 106 | Second source pin |
| 107 | Power contact |
| 108 | Electrical short |
| 109 | Power supply |
| 110 | First circuit |
| 115 | Fluorescent lamp holder |
| 120 | Fluorescent lamp holder |
| 122 | Electronic ballast for fluoresent lamp |
| 123 | Electronic ballast for fluoresent lamp |
| 124 | 3rd power pins |
| 125 | Power contact |
| 126 | 4th power pins |
| 127 | Power contact |
| 128 | Electrical short |
| 130 | Fluorescent lamp holder |
| 140 | Second circuit |
| 200 | Circuit |
| 220 | Insulating power supply |
| 222 | Output |
| 224 | Output |
| 228 | Isolating transformer |
| 230 | Full-wave rectifying circuit |
| 232 | Field-effect transistor |
| 233 | Grid |
| 240 | Flyback diode |
| 242 | Capacitor |
| 250 | Non-isolated power supply |
| 252 | Field-effect transistor |
| 253 | Grid |
| 254 | Capacitor |
| 256 | Inductor |
| 258 | Capacitor |
| 260 | Diode |
| 262 | By-pass capacitor |
| 264 | By-pass capacitor |
| 264 | By-pass capacitor |
| 265 | By-pass capacitor |
| 266 | Imagination lock |
| 268 | Imagination lock |
| 282 | Rectification circuit |
| 300 | LED |
| 301 | LED |
| 302 | LED |
| 303 | LED circuit |
| 304 | LED circuit |
| 306 | Node |
| 307 | Node |
| 308 | Node |
| 310 | Node |
| 311 | Node |
| 312 | Node |
| 314 | Turn to diode |
| 315 | Turn to diode |
| 316 | Turn to diode |
| 317 | Turn to diode |
| 318 | Turn to diode |
| 319 | Turn to diode |
| 320 | Turn to diode |
| 321 | Turn to diode |
| 324 | Electrolytic capacitor |
| 325 | Blocking diode |
| 326 | LED circuit unit |
| 327 | LED circuit unit |
| 328 | Turn to diode |
| 329 | Turn to diode |
| 330 | Turn to diode |
| 331 | Turn to diode |
| 332 | Turn to diode |
| 333 | Turn to diode |
| 334 | Turn to diode |
| 335 | Turn to diode |
| 337 | Interface field-effect transistor |
| 338 | Body diode |
| 349 | First conductor |
| 340 | Biasing circuit |
| 341 | By-pass capacitor |
| 342 | Interface field-effect transistor |
| 343 | Body diode |
| 344 | Second conductor |
| 345 | Biasing circuit |
| 346 | By-pass capacitor |
| 350 | First conduction control member |
| 352 | Capacitor |
| 354 | Switch |
| 358 | Short circuit current |
| 6370 | Second conduction control member |
| 372 | Short circuit current |
| 374 | Capacitor |
| 376 | Switch |
| 380 | Circuit |
| 382 | Isolating transformer |
| 390 | Circuit |
| 392 | Autotransformer |
| 394 | Conductor |
| 400 | Electric coupling or mechanical couplings |
| 1200 | Circuit |
| 1202 | Node |
| 1204 | Node |
| 1300 | Circuit |
| 1302 | Node |
| 1304 | Node |
| 1400 | Circuit |
| 1500 | Arrange |
| 1510 | Lamp socket |
| 1511 | First power contact |
| 1512 | Second source contact |
| 1520 | Voltage source |
| 1530 | Connector |
| 1535 | Device |
| 1540 | Electric probe |
| 1550 | Element |
| 1555 | Element |
Described above is a kind of can repacking into the LED in existing fluorescent lamp holder, and there is double operation pattern, rely on the existing electronic ballast for fluoresent lamp be connected with lamp bracket to power, or also can directly be energized from power transmission line.Favourable aspect is, configurable LED, when described LED to be installed in the lamp bracket of wiring directly be energized from power transmission line, reduces possible life-threatening Danger Electric shock risk.Some embodiments of lamp of the present invention are configured to provide the more protections preventing from getting an electric shock to the people installing lamp.
The scope of claim should not limited by preferred embodiment and example, and should give the overall consistent maximum magnitude deciphering of same printed instructions.
Claims (21)
1. there is a LED for double operation pattern, rely on the fluorescent lamp holder of wiring to provide transmission of electricity electric power, or rely on electric ballast to provide the alternating current of ballast frequency, comprising:
A) there is the thin-long casing of first end and the second end;
B) first end of described thin-long casing is provided with the first and second power pins;
C) the second end of described thin-long casing is provided with the 3rd power pins;
D) the first circuit is used for being energized in a first mode at least one plan, and provides main electric power along the LED that the length of thin-long casing is outwards luminous; When LED is inserted into the fluorescent lamp holder with power contact, described power contact receives the first and second power pins, and is directly connected to power transmission line, with obtain the transmission frequency lower than ballast frequency power time, namely there is first mode; The electric current of at least one LED that plan is energized in a first mode is led in first circuit restriction;
E) second circuit is energized in a second mode at least one plan, and provides main electric power along the LED that the length of thin-long casing is outwards luminous; When LED is inserted into the fluorescent lamp holder with power contact, described power contact receives second and the 3rd power pins that are positioned at lamp opposite end, and be directly connected to described electric ballast with from obtain electric power time, namely there is the second pattern; Second circuit comprise one from second and the 3rd power pins receive the rectification circuit of electric power;
F) the first conduction control member is connected between second source pin and rectification circuit, when lamp opposite end second and the 3rd power pins be connected to described electric ballast time, be that at least one is intended the LED that is energized in a second mode and powers in order to allow second circuit; And
G) the second conduction control member is connected on the 3rd between power pins and rectification circuit, when lamp opposite end second and the 3rd power pins be connected to described electric ballast time, be that at least one is intended the LED that is energized in a second mode and powers in order to allow second circuit.
2. LED as claimed in claim 1, wherein:
A) at least one LED intending being energized in a first mode described has at least one identical LED with at least one LED intending being energized in a second mode described; And
B) when the first circuit run through the first and second power pins be directly connected to power transmission line power with transmission frequency and realize time, described first conduction control member stop transmission of electricity electric power interference level by second source pin arrive second circuit; When flicker type and sustained deviation of light and average intensity of illumination that at least one intends the LED be energized in issuable first circuit-mode when being used alone the first circuit compare, the interference level of described transmission of electricity electric power by least one intend in a first mode with at least 10% of the LED powered in 0.1 hertz to 200 frequency range flicker type deviation of light and sustained deviation of light that at least one intends at least 10% of the LED powered in a first mode define.
3. LED as claimed in claim 1, wherein:
A) at least one LED intending being energized in a first mode described has at least one identical LED with at least one LED intending being energized in a second mode described; And
B) when the first circuit run through the first and second power pins be directly connected to power transmission line power with transmission frequency and realize time, described second conduction control member stop transmission of electricity electric power interference level by the 3rd power pins arrive second circuit; When flicker type and sustained deviation of light and average intensity of illumination that at least one intends the LED be energized in issuable first circuit-mode when being used alone the first circuit compare, the interference level of described transmission of electricity electric power by least one intend in a first mode with at least 10% of the LED powered in 0.1 hertz to 200 frequency range flicker type deviation of light and sustained deviation of light that at least one intends at least 10% of the LED powered in a first mode define.
4. LED as claimed in claim 3, wherein:
A) at least one LED intending being energized in a first mode described has at least one identical LED with at least one LED intending being energized in a second mode described; And
B) a coupling transformer between second circuit rectification circuit and described first and second conduction control members;
Compared with when being c) 1:1 with transformer transformation ratio, the transformation ratio that described transformer has reduces described second circuit and runs the second pattern at least one LED levels of current of powering.
5. LED as claimed in claim 5, wherein, transformer is isolating transformer.
6. LED as claimed in claim 5, wherein, transformer is autotransformer.
7. LED as claimed in claim 1, wherein, for following often kind of situation, first and second conduction control members can by being configured in by when the probe circuit directly connected between selected power pins and ground connection is measured, and when the power pins that LED is selected is connected to the first and second power contacts, stop with the electric current conduction presetting the transmission frequency of 10 milliamperes of root-mean-square values of 50 hertz and 60 hertz operations exceeding, described circuit comprises the first and second series elements, first element comprises 1500 ohm of noninductive resistors in parallel and 0.22 microfarad capacitor, second element comprises the noninductive resistor of 500 ohm, wherein, described first power contact is by a fixing voltage, or the voltage changed in the voltage range meeting transmission voltage, or intend being responsible for power supply to the voltage of aforementioned first circuit supply:
A) the first power pins is connected to the first power contact, and second source pin is connected to second source contact, and probe is connected to the 3rd power pins;
B) the first power pins is connected to the first power contact, and second source pin is connected to second source contact, and probe is connected to the 4th power pins;
C) the 3rd power pins is connected to the first power contact, and the 4th power pins is connected to second source contact, and probe is connected to the first power pins;
D) the first power pins is connected to the first power contact, and the 4th power pins is connected to second source contact, and probe is connected to second source pin;
E) second source pin is connected to the first power contact, and the first power pins is connected to second source contact, and probe is connected to the 3rd power pins;
F) second source pin is connected to the first power contact, and the first power pins is connected to second source contact, and probe is connected to the 4th power pins;
G) the 4th power pins is connected to the first power contact, and the 3rd power pins is connected to second source contact, and probe is connected to the first power pins; And
H) the 4th power pins is connected to the first power contact, and the 3rd power pins is connected to second source contact, and probe is connected to second source pin.
8. LED as claimed in claim 7, wherein, configuration first and second conduction control member, to realize aforementioned default milliampere root-mean-square value 5.
9. LED as claimed in claim 1, wherein, described first circuit is active circuit, and described second circuit is passive circuit.
10. LED as claimed in claim 1, wherein, the quantity of the LED that at least one quantity intending the LED be energized in a first mode is energized in a second mode more than at least one plan.
11. LED as claimed in claim 1, wherein, the quantity of the LED that at least one quantity intending the LED be energized in a second mode is energized in a first mode more than at least one plan.
12. LED as claimed in claim 1, wherein:
A) described first circuit comprises an isolating transformer, in order to receive transmission of electricity electric power input and provide at least one LED intending being energized in a first mode modulate electric power output between; And
B) described isolating transformer stops when running described first mode transmission of electricity electric power by described second circuit and stops described first circuit of interference.
13. LED as claimed in claim 1, wherein:
A) configure described first and second circuit, thus the LED that at least one LED intending being energized in described first mode and at least one plan are energized in described second pattern is separated from each other; And
B) configure described second circuit to power to avoid the LED that it intends being energized in described first mode at least one when described first mode runs.
14. LED as claimed in claim 1, wherein:
A) at least one LED intending being energized in a first mode described has multiple identical LED with at least one LED intending being energized in a second mode described, and forms many LED, and every bar LED at least has a LED;
B) LED circuit is used for arranging many LED; LED circuit comprises one for arranging the first LED circuit unit of at least the first and second LED in many LED, thus the every bar LED at least the first and second LED is when from the first power on circuitry, all has roughly equal voltage therebetween;
C) the first LED circuit unit is configured, thus when by the first power on circuitry, the parallel running of described at least the first and second LED energy, thus every bar LED has roughly equal voltage therebetween; And
D) the first LED circuit unit is configured further, thus when being energized by second circuit, described at least the first and second LED strip through transport row, thus the voltage of at least the first and second LED described in being supplied to by second circuit is substantially equal to the summation of the every bar LED voltage respectively through described at least the first and second LED.
15. LED as claimed in claim 14, wherein the first LED circuit comprises and turns to diode, at least the first and second LED parallel runnings when powering from the first circuit connected in series described in permission, and series operation when powering from second circuit.
16. LED as claimed in claim 14, wherein:
A) LED circuit comprises one for arranging the second LED circuit unit of at least the first and second different LED in many LED, thus the every bar LED at least the first and second different LED is when from the first power on circuitry, all has roughly equal voltage therebetween;
B) the second LED circuit unit is configured, thus when by the first power on circuitry, described at least the first and second different LED parallel runnings, thus every bar LED has roughly equal voltage therebetween; And
C) the second LED circuit unit is configured further, thus when being energized by second circuit, aforementioned at least the first and second different LED series operations, thus the voltage of at least the first and second different LED described in being supplied by second circuit is substantially equal to the summation of the every bar LED voltage respectively through aforementioned at least the first and second different LED.
17. LED as described in claim 14 or 16, wherein:
A) the first circuit is connected to LED circuit by the first and second conductors; And
B) provide one with the respective insulating element of at least one conductor series connection in the first and second conductors, during to intend be energized from second circuit at aforementioned LED, the first circuit and the monopolar current from aforementioned LED circuit unit are kept apart.
18. LED as described in claim 17, wherein, described respective insulating element comprises a field-effect transistor.
19. LED as claimed in claim 17, wherein:
A) provide the respective insulating element with described first conductor series connection, during to intend being energized from second circuit at aforementioned LED, the first circuit and the monopolar current from aforementioned LED circuit unit are kept apart; And
B) provide the respective insulating element with described second conductor series connection, during to intend being energized from second circuit at aforementioned LED, the first circuit and the monopolar current from aforementioned LED circuit unit are kept apart.
20. LED as claimed in claim 17, wherein, described respective insulating element comprises a field-effect transistor.
21. LED as claimed in claim 19, wherein, described respective insulating element comprises a field-effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556679.7A CN105530737B (en) | 2014-10-20 | 2015-09-02 | Dual-mode operation LED light |
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201462066306P | 2014-10-20 | 2014-10-20 | |
| US62/066,306 | 2014-10-20 | ||
| US14/555,294 US20160113076A1 (en) | 2014-10-20 | 2014-11-26 | Led lamp with dual mode operation |
| US14/555,294 | 2014-11-26 | ||
| CN201510007587 | 2015-01-07 | ||
| CN2015100075873 | 2015-01-07 | ||
| US14/702,591 US9557044B2 (en) | 2014-10-20 | 2015-05-01 | LED lamp with dual mode operation |
| US14/702,591 | 2015-05-01 | ||
| CN201510556679.7A CN105530737B (en) | 2014-10-20 | 2015-09-02 | Dual-mode operation LED light |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105530737A true CN105530737A (en) | 2016-04-27 |
| CN105530737B CN105530737B (en) | 2019-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510556679.7A Active CN105530737B (en) | 2014-10-20 | 2015-09-02 | Dual-mode operation LED light |
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| Country | Link |
|---|---|
| CN (1) | CN105530737B (en) |
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| CN109587866A (en) * | 2017-09-28 | 2019-04-05 | 朗德万斯公司 | Electronic driver and LED light for LED illumination module |
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| CN105530737B (en) | 2019-05-21 |
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