CN102404903B - Lamp driving device - Google Patents
Lamp driving device Download PDFInfo
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- CN102404903B CN102404903B CN201010282727.5A CN201010282727A CN102404903B CN 102404903 B CN102404903 B CN 102404903B CN 201010282727 A CN201010282727 A CN 201010282727A CN 102404903 B CN102404903 B CN 102404903B
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Abstract
The invention provides a lamp driving device, which is used for driving a plurality of lamps. The lamp driving device comprises a power supply conversion circuit and a plurality of groups of lamp connecting seats, wherein the power supply conversion circuit is used for transforming an input voltage into a first direct current voltage and outputting a first current, the first current is a constant current value in essence, a positive end and a negative end of each group of lamp connecting seat are electrically connected with the lamp corresponding to the plurality of lamps, each group of lamp connecting seat is used for outputting an output voltage and an output current to the lamp correspondingly and electrically connected with the plurality of lamps, the plurality of lamp connecting seats are electrically connected with one another in series, the output voltage between the positive end and the negative end of each group of lamp connecting seat is obtained by dividing the first direct current voltage, and the output currents output by each group of lamp connecting seat are the same in essence. With the adoption of the lamp driving device, the power efficiency can be improved, and the currents and the brightness of each group of lamps are accurately the same; moreover, a manufacturer can manufacture the lamp driving device for different numbers of lamps at a low cost.
Description
Technical field
The present invention relates to a kind of lamp driving device, relate in particular to the lamp driving device of a kind of driving multi-group light-emitting diode (Light-Emitting Diode, LED) light fixture.
Background technology
Environmental consciousness comes back in recent years, and carbon reduction becomes "sport for all" already, and electronics industry is also devoted to the product that research and development have more the feature of environmental protection, energy-conserving products such as the utilization of solar energy and light-emitting diode.For reaching the object of environmental protection and energy saving, light-emitting diode is now generally used in general-purpose lighting apparatus, the application such as the illumination such as home lighting device, car headlight device, hand-held lighting device and billboard.
Refer to Fig. 1, it is known lamp driving device and allocation plan thereof.As shown in Figure 1, each light fixture 1A～1C is arranged at diverse location within doors according to user's demand, and uses lamp driving device 1 to drive many group light fixture 1A～1C simultaneously.This lamp driving device 1 is realized in the mode of stage type power-switching circuit, and it comprises first order circuit 11 and second level circuit 12, and wherein, first order circuit 11 is an AC-DC change-over circuit, and it is for by input power V
inbe converted to the bus voltage V of fixed voltage value
busand export second level circuit 12 to.Second level circuit 12 comprises the first DC-to-DC change-over circuit 121, the second DC-to-DC change-over circuit 122 and the 3rd DC-to-DC change-over circuit 123, and the output of the first～three DC-to-DC change-over circuit 121,122,123 is connected respectively first group of light fitting connecting seat 131A, 131B, second group of light fitting connecting seat 132A, 132B and the 3rd group of light fitting connecting seat 133A, 133B.Wherein, the first～three group of light fitting connecting seat (131A, 131B), (132A, 132B), (133A, 133B) are electrically connected at respectively a light fixture, to transmit respectively the first～three output voltage V
o1, V
o2, V
o3to corresponding light fixture 1A～1C.
When lamp switch 10 is switched on, input voltage V
incan be sent to the input of first order circuit 11 via lamp switch 10, and be converted to by first order circuit 11 the bus voltage V that about 52V determines magnitude of voltage
busafter, provide to the input of each DC-to-DC change-over circuit 121,122,123 of second level circuit 12, then, via after the first～three DC-to-DC change-over circuit 121,122,123 difference step-downs, export the first output voltage V
o1, the second output voltage V
o2and the 3rd output voltage V
o3.In this embodiment, lamp driving device 1 is for driving the LED lamp of same specification, because light-emitting diode is the element that brightness is directly proportional to electric current, in order to make the brightness of each LED lamp identical, the specification of the first～three DC-to-DC change-over circuit 121,122,123 must be identical, therefore output voltage V
o1, V
o2, V
o3all be about 50V, and the first～three DC-to-DC change-over circuit 121,122,123 must provide first of about same current～three output current I
o1, I
o2, I
o3yet, this DC-to-DC change-over circuit 121,122,123 because of production process differ and element and element between there is error, cause usefulness to be not quite similar, thereby the first～three output current I that the first～three DC-to-DC change-over circuit 121,122,123 is provided
o1, I
o2, I
o3cannot be identical.
In addition, because every one-level circuit has power loss, input electric energy is after the conversion through first order circuit 11 and second level circuit 12, the electric energy that is sent to light fixture can reduce, except meeting causes decrease in efficiency and unnecessary waste of energy, more make lamp driving device 1 operational paradigm effectively to promote, therefore cannot reach the object of carbon reduction.Moreover, in each DC-to-DC change-over circuit 121,122,123 inside, there is the control circuit of controlling the running of DC-to-DC change-over circuit, so circuit complexity is higher and high cost during DC-to-DC change-over circuit modularization, for example, if (: drive three light fixtures to change into and drive six light fixtures) cannot utilize modular mode only to adjust or change the number of modular DC-to-DC change-over circuit when the light fixture number driving is different, but need to redesign circuit according to the different demand of user, cause the waste of development time and cost to improve.
Therefore, how to develop a kind of high loss of known lamp driving device and expensive problem of solving, can provide accurately same current to give light fixture again, real be current problem in the urgent need to address.
Summary of the invention
A main purpose of the present invention is to provide a kind of lamp driving device, the luminosity that solves each light fixture drive such as known lamp driving device is different, cannot utilize modular mode real world applications in the lamp driving device of different lamps number, cause the defects such as the overall operation efficiency of or lamp driving device lower with electrical efficiency is lower.
For reaching above-mentioned purpose, of the present invention one compared with broad sense execution mode for a kind of lamp driving device is provided, comprise: power-switching circuit, it is for input voltage being converted to the first direct voltage, and the first electric current of current value is determined in fact in output; And organize light fitting connecting seats more, anode and negative terminal of each group light fitting connecting seat are electrically connected light fixture corresponding to described a plurality of light fixtures, and export the light fixture that an output voltage and outputs current to the corresponding electric connection of described a plurality of light fixture; Wherein, described many group light fitting connecting seats interconnect with electrical series system, and this output voltage between the positive and negative terminal of each group light fitting connecting seat is obtained by this first direct voltage dividing potential drop, and this output current of each group light fitting connecting seat output is identical in fact.
The lamp driving device of driving multi-group light-emitting diode light fixture of the present invention, realizes in the mode of single stage type circuit, can promote it with electrical efficiency, and light fixture and lamp locker to be to be electrically connected in series, and electric current and the brightness that can make each organize light fixture are accurately identical.In addition, lamp driving device of the present invention more can utilize lower-cost modular mode to realize the lamp driving device that is applied to different lamps number, and the mode at lower cost of manufacturer that can make to manufacture the lamp driving device of different lamps number realizes.
Accompanying drawing explanation
Fig. 1 is known lamp driving device and allocation plan thereof.
Fig. 2 is the lamp driving device schematic diagram of a preferred embodiment of the present invention.
Fig. 3 is the lamp driving device schematic diagram of another preferred embodiment of the present invention.
Fig. 4 A is the lamp driving device schematic diagram of another preferred embodiment of the present invention.
Fig. 4 B is the part detailed circuit diagram of Fig. 4 A.
Description of reference numerals in above-mentioned accompanying drawing is as follows:
Lamp driving device: 2,3,4 input voltage: V
in
Power-switching circuit: 21 first direct voltage: V
1
The first output: 21a the first electric current: I
1
The second output: 21b the first output voltage: V
o1
Light fitting connecting seat: 22,23,24 first output current: I
o1
The first light fitting connecting seat anode: 22a the second output voltage: V
o2
The first light fitting connecting seat negative terminal: 22b the second output current: I
o2
The second light fitting connecting seat anode: 23a the 3rd output voltage: V
o3
The second light fitting connecting seat anode: 23b the 3rd output current: I
o3
The 3rd light fitting connecting seat anode: 24a the first resistance: R
1
The 3rd light fitting connecting seat anode: 24b the second resistance: R
2
Light fixture: 221,231,241 the 3rd resistance: R
3
Circuit overcurrent protection: 31 the 4th resistance: R
4
Current detection circuit: 311 the 5th resistance: R
5
First node: K1 Section Point: K
2
Output protection circuit: 36a, 36b, 36c
The first switch element: S
1
The control end of the first switch element: S
1a
The electric current conduction terminals of the first switch element: S
1b, S
1c
Second switch element: S
2
The control end of second switch element: S
2a
The electric current conduction terminals of second switch element: S
2b, S
2c
The 3rd switch element: S
3body diode: D
b
First controls voltage: V
k1the first Zener diode: D
z1
Second controls voltage: V
k2the second Zener diode: D
z2
The first by-pass current: I
a1the second by-pass current: I
a2
The 3rd by-pass current: I
a3
Embodiment
Some exemplary embodiments that embody feature & benefits of the present invention will describe in detail in the explanation of back segment.Be understood that the present invention can have various variations in different modes, it does not depart from the scope of the present invention, and explanation wherein and the accompanying drawing use that ought explain in itself, but not in order to limit the present invention.
Lamp driving device of the present invention is applicable to a plurality of light fixtures, below by exemplary application in the operation principles of three light fixtures explanation lamp driving devices of the present invention, but not as limit.Refer to Fig. 2, the lamp driving device schematic diagram that it is a preferred embodiment of the present invention.As shown in Figure 2, lamp driving device 2 of the present invention comprises power-switching circuit 21, first group of light fitting connecting seat 22, second group of light fitting connecting seat 23, the 3rd group of light fitting connecting seat 24, wherein power-switching circuit 21 is realized with the circuit mode of single stage type, for example single-stage flyback (single-stage flyback) change-over circuit, active clamping flyback (active-clamp) change-over circuit or resonant mode (resonant) change-over circuit, in order to by an input voltage V
inbe converted to one first direct voltage V
1, and export one first electric current I of determining in fact current value
1.First group of light fitting connecting seat 22, second group of light fitting connecting seat 23, the 3rd group of light fitting connecting seat 24 interconnect with electrical series system between the first output 21a of power-switching circuit 21 and the second output 21b, in order to provide respectively, give the first light fixture 221, the second light fixture 231, the 3rd light fixture 241 is corresponding connects, and by first group of light fitting connecting seat 22, second group of light fitting connecting seat 23, the 3rd group of light fitting connecting seat 24, transmits respectively the first～three output voltage V
o1, V
o2, V
o3to the first light fixture 221, the second light fixture 231, the 3rd light fixture 241.
In this embodiment, the first light fixture 221, the second light fixture 231, the 3rd light fixture 241 are LED lamp, but not as limit.First group of light fitting connecting seat 22 comprises anode 22a and negative terminal 22b, and similarly, the second～three group of light fitting connecting seat 23,24 comprises anode 23a, 24a and negative terminal 23b, 24b.Wherein, the anode 22a of first group of light fitting connecting seat 22 is electrically connected at the first output 21a (anode) of power-switching circuit 21, the negative terminal (i.e. the negative terminal 24b of the 3rd group of light fitting connecting seat 24) of last group light fitting connecting seat is electrically connected at the second output 21b (negative terminal) of power-switching circuit 21, and first group of light fitting connecting seat 22 and last electrical connection of organizing between light fitting connecting seat are that the negative terminal of upper one group of light fitting connecting seat and the anode of next group light fitting connecting seat are electrically connected, for example the negative terminal 22b of first group of light fitting connecting seat 22 and the anode 23a of second group of light fitting connecting seat 23 are electrically connected, or the anode 24a of the negative terminal 23b of second group of light fitting connecting seat 23 and the 3rd group of light fitting connecting seat 24 is electrically connected.In addition, every group of light fitting connecting seat 22,23,24 provides respectively the first output current I
o1, the second output current I
o2, the 3rd output current I
o3to corresponding the first～three light fixture 221,231,241 being electrically connected.In this embodiment, lamp driving device 2 of the present invention is for driving a plurality of LED lamps.When lamp switch (not shown) is switched on and makes input voltage V
inbe sent to after the input of power-switching circuit 21, power-switching circuit 21 can be by input voltage V
inbe converted to the first direct voltage V
1, and export first electric current I of determining in fact current value
1.Because, power-switching circuit 21 is with constant current mode running, and the first～three group of light fitting connecting seat 22,23,24 connect with electrical series system, therefore the first～three output current I
o1, I
o2, I
o3current value all with the first electric current I
1equate, even if the first～three light fixture 221,231,241 is comprised of the light-emitting diode of different manufacturers each other, first of same electrical flow valuve～three output current I
o1, I
o2, I
o3can make the light-emitting diode in the first～three light fixture 221,231,241 there is similar brightness.
In this embodiment, the first direct voltage V
1equal the first～three output voltage V
o1, V
o2, V
o3sum total (V
1=V
o1+ V
o2+ V
o3) and along with the first～three output voltage V of the first～tri-light fixture 221,231,241
o1, V
o2, V
o3change, due to, each output voltage V
o1, V
o2, V
o3magnitude of voltage can along with the specified running magnitude of voltage of the corresponding light fixture being electrically connected change, therefore, the first direct voltage V
1magnitude of voltage can be simultaneously along with the number of light fitting connecting seat and the specified running magnitude of voltage of each light fixture increase and corresponding increasing.In order to prevent light fixture when running, user touches light fixture or lamp driving device 2 and causes user to be shocked by electricity, and the specified running magnitude of voltage of light fixture can design below the minimum voltage value of the human-body conduction requiring lower than safety at present, for example, be about below 60V.
The first direct voltage V
1magnitude of voltage can be simultaneously along with the number of light fitting connecting seat and the specified running magnitude of voltage of each light fixture increase and corresponding increasing, and the output voltage V of the first～three group of light fitting connecting seat 22,23,24 that user can touch
o1, V
o2, V
o3magnitude of voltage be the specified running magnitude of voltage of light fixture, below the minimum voltage value of the human-body conduction generally requiring lower than safety, for example, approximately below 60V, can not increase and corresponding increasing along with the number of light fitting connecting seat, so, if user because touch light fixture or lamp driving device 2, can not cause user to be shocked by electricity accidentally yet.
Lamp driving device 2 of the present invention is because realizing with single stage type circuit mode, therefore electricity consumption enhancing efficiency, the electric energy overall losses when lamp driving device 2 conversion is less, and this first～three group of light fitting connecting seat 22,23,24 is electrically to connect and to interconnect, therefore export the output current I of each light fixture 221,231,241 to
o1, I
o2, I
o3current value identical in fact, can make the brightness of each LED lamp identical in fact.Refer to Fig. 3 and coordinate Fig. 2, wherein Fig. 3 is the lamp driving device schematic diagram of another preferred embodiment of the present invention.As shown in Figure 3; lamp driving device 3 of the present invention is except comprising power supply changeover device 21, first group of light fitting connecting seat 22, second group of light fitting connecting seat 23, the 3rd group of light fitting connecting seat 24; more comprise a circuit overcurrent protection 31 and be electrically connected in series in power-switching circuit 21 and organize between light fitting connecting seat 22,23,24 more, in order to prevent the first electric current I of power-switching circuit 21 outputs
1there is overcurrent.The first electric current I when some abnormal conditions
1can promote moment, for avoiding the first excessive electric current I
1directly feed back to power-switching circuit 21 and cause lamp driving device 3 to damage, when the first electric current I
1while being promoted to a rated value, circuit overcurrent protection 31 can start action, the first electric current I that deenergization change-over circuit 21 and many group light fitting connecting seats are 22,23,24
1whole current delivery loop.
Referring again to Fig. 3; circuit overcurrent protection 31 comprises a current detection circuit 311 and a switching circuit; wherein current detection circuit 311 is electrically connected at outlet side and this switching circuit of power-switching circuit 21, in order to the first electric current I according to this current detection circuit 311 of flowing through
1the corresponding one first control voltage V that produces
k1to the control end of this switching circuit, and by this first control voltage V
k1size is controlled this switching circuit conducting or cut-off.In the present embodiment, this switching circuit is electrically connected at lamp driving device 2 these first electric current I of output
1current circuit on, and comprise one first switch element S
1with a body diode Db (body diode), this current detection circuit 311 comprises one first resistance R
1, one second resistance R
2, a second switch element S
2and one first Zener diode D
z1(zener diode).In the present embodiment, the first switch element S
1for mos field effect transistor (MOSFET), and the first switch element S
1control end S
1awith two electric current conduction terminals S
1b, S
1ccorrespond to respectively grid (Gate), drain electrode (Drain) and the source electrode (Source) of mos field effect transistor; Second switch element S
2for bipolar junction transistor (BTJ), and second switch element S
2control end S
2awith two electric current conduction terminals S
2b, S
2ccorrespond to respectively base stage (Base), collector (Collector) and emitter-base bandgap grading (Emitter).
In this switching circuit, the first switch element S
1control end S
1abe electrically connected to first node K
1, the first switch element S
1an electric current conduction terminals S
1bbe electrically connected to the negative terminal 24b of the 3rd group of light fitting connecting seat 24, the first switch element S
1another electric current conduction terminals S
1cbe electrically connected to a Section Point K
2, and body diode D
bnegative electrode (Cathode) and the first switch element S
1electric current conduction terminals S
1bbe electrically connected body diode D
banode (Anode) and the first switch element S
1another electric current conduction terminals S
1cbe electrically connected.
In this current detection circuit 311, the first resistance R
1one end be electrically connected to the first output 21a of power-switching circuit 21 and the anode 22a of first group of light fitting connecting seat 22, the other end is electrically connected to first node K
1(node); The first Zener diode D
z1negative electrode be electrically connected at first node K
1, the first Zener diode D
z1anode be electrically connected to Section Point K
2, in order to strangulation first node K
1and Section Point K
2between first control voltage V
k1size; Second switch element S
2control end S
2abe electrically connected at Section Point K
2, second switch element S
2an electric current conduction terminals S
2bbe electrically connected to first node K
1, second switch element S
2another electric current conduction terminals S
2cbe electrically connected to the second output 21b of power-switching circuit 21.The second resistance R
2one end be connected to Section Point K
2, the second resistance R
2the other end be connected to the second output 21b of power-switching circuit 21, make the second resistance R
2the first switch element S with switching circuit
1electrically be connected in series.First node K
1and Section Point K
2between across there being the first control voltage V
k1, and along with the first direct voltage V
1change, and the first electric current I
1second resistance R of flowing through
2time, Section Point K
2and between the second output 21b of power-switching circuit 21 across having one second to control voltage V
k2, and along with the first electric current I
1change.
When this lamp driving device 3 is when operating under normal circumstances, the action of light fitting connecting seat 22,23,24 and light fixture 221,231,241 is with identical described in last embodiment, thus repeat no more, and the first electric current I now
1current value within the scope of rated value, first controls voltage V
k1magnitude of voltage be more than or equal to the conducting voltage V of switching circuit
th, so the first switch element S of switching circuit
1will conducting, make the first electric current I
1the first switch element S flows through
1current delivery loop organize at the most light fitting connecting seat 22,23,24; And the second electricity group R
2pressure drop, second control voltage V
k2magnitude of voltage, can be less than second switch element S
2conducting voltage V
tb, for example 0.6V, makes second switch element S2 cut-off, the first electric current I
1by the first switch element S of switching circuit
1with the second resistance R
2after get back to power-switching circuit 21.
On the contrary, when the first electric current I
1current value moment promote and surpass the first electric current I
1rated value scope time, for example surpass the first electric current I
1load current value 10%, surpass the first electric current I
1rated value scope second resistance R of flowing through
2the the second control voltage V producing
k2magnitude of voltage can be greater than second switch element S
2conducting voltage V
tb, be for example greater than 0.6V, make second switch element S
2conducting, causes the first control voltage V
k1magnitude of voltage be zero or lower than the first switch element S
1conducting voltage V
ththerefore, the first switch element S
1cut-off, and avoid the first excessive electric current I
1directly flow back to power-switching circuit 21 and damage, to reach the function of protection power source change-over circuit 21.
Refer to Fig. 4 A and Fig. 4 B and coordinate Fig. 2 and Fig. 3, wherein Fig. 4 A is the lamp driving device schematic diagram of another preferred embodiment of the present invention, and Fig. 4 B is the part detailed circuit diagram of Fig. 4 A.As shown in Figure 4 A and 4 B shown in FIG., lamp driving device of the present invention is except power supply changeover device 21, circuit overcurrent protection 31, many group light fitting connecting seats 22, 23, outside 24, more comprise a plurality of output protection circuit 36a～36c, such as but not limited to the first output protection circuit 36a, the second output protection circuit 36b and the 3rd output protection circuit 36c, it is electrically connected in parallel with each group light fitting connecting seat 22～24 respectively, the anode 22a of one end of the first output protection circuit 36a and first group of light fitting connecting seat 22 is electrically connected, the negative terminal 22b of the other end and first group of light fitting connecting seat 22 is electrically connected, by that analogy.Described a plurality of output protection circuit 36a～36c is used for providing user an optionally drive part light fixture 221～241; and without whole uses; or when the light-emitting diode of arbitrary light fixture 221～241 damages, can avoid for being electrically connected in series, causing whole light fixtures 221～241 all to stop driven situation because of light fitting connecting seat 22～24.
The first group of light fitting connecting seat 22 of take is example, and the light-emitting diode in light fixture 221 damages and makes light fixture 221 is that open-circuit condition or user are not electrically connected light fixture 221 when the abnormalities such as first group of light fitting connecting seat 22 occur, the first output voltage V
o1magnitude of voltage can moment promote and surpass the first output voltage V
o1specified running range of voltage values, in this embodiment, during higher than about 55V, the 3rd switch element S
3can be triggered and conducting, make the first output protection circuit 36a running and by first group of light fitting connecting seat 22 bypass (bypass) to stop first group of light fitting connecting seat 22 output current.Now, flow into the first by-pass current I of the first output protection circuit 36a
a1current value equal the first electric current I 1, the first output current I
o1current value be zero, and flow into the first by-pass current I of the first output protection circuit 36a
a1can flow through second group of light fitting connecting seat 23 to drive remaining light fixture 231,241.In other words; when each light fixture 221,231,241 normal operation; the first～three group of light fitting connecting seat 22～24 can be exported electric energy to corresponding light fixture, and the first～three output protection circuit 36a～36c can not move, and flow to the electric current I of the first～three output protection circuit 36a～36c
a1～I
a3current value be zero.
Referring again to Fig. 4 A and Fig. 4 B, the circuit of a plurality of output protection circuit 36a～36c is all identical, but not as limit.For ease of explanation, below will take the detailed circuit of the first output protection circuit 36a as demonstration example is to illustrate its circuit and operation principles thereof.The first output protection circuit 36a comprises one the 3rd switch element S
3with circuits for triggering, the 3rd switch element S wherein
3be electrically connected between positive and negative end 22a, the 22b of first group of light fitting connecting seat 22, and circuits for triggering are electrically connected at positive and negative end 22a, 22b and the 3rd switch element S of first group of light fitting connecting seat 22
3control end, in order to according to first～output voltage V of first group of light fitting connecting seat 22
o1control the 3rd switch element S
3whether conducting.
In the present embodiment, the 3rd switch element S
3can be but not be limited to thyristor (Silicon-controlled rectifier, SCR); Circuits for triggering comprise: one the 3rd resistance R
3, one the 4th resistance R
4and one second Zener diode D
z2, and circuits for triggering optionally more comprise: one the 5th resistance R
5and the delay circuit that forms of capacitor C, and be electrically connected at circuits for triggering and the 3rd switch element S
3control end between.The second Zener diode D wherein
z2, the 3rd resistance R
3, the 4th resistance R
4between positive and negative end 22a, the 22b of first group of light fitting connecting seat 22, form series connection electrical connection, as the use of current limliting and dividing potential drop.When the first output voltage V
o1magnitude of voltage moment promote and surpass the first output voltage V
o1specified running range of voltage values time, for example higher than specified running magnitude of voltage 10% time, circuits for triggering can transmit triggering signal to the three switch element S
3control end control the 3rd switch element S
3conducting, make the first output protection circuit 36a action and by first group of light fitting connecting seat 22 bypass to stop first group of light fitting connecting seat 22 output current.
In the present embodiment, capacitor C is electrically connected at the control end of the 3rd switch element S3, and the 5th resistance R
5and be electrically connected at the 3rd resistance R
3and between capacitor C, use so that the circuits for triggering of the first output protection circuit 36a are controlled the 3rd switch element S
3during conducting, produce a time of delay, to increase the judgement time of circuits for triggering, reduce the chance of the first output protection circuit 36a misoperation.
Due to; the first～three group of light fitting connecting seat 22～24 and first～three output protection circuit 36a～36c do not comprise complicated control circuit; can be easily with mode module cheaply, turn to an output module 32; and the output module 32 that the number that is designed to light fitting connecting seat is different; when user's demand motive is more or during different lamps number; only need to change output module 32, for example, the output module that drives three light fixtures is replaced by the output module that drives six light fixtures.
In sum, the lamp driving device of driving multi-group light-emitting diode light fixture of the present invention, realizes in the mode of single stage type circuit, can promote it with electrical efficiency, and light fixture and lamp locker are to be electrically connected in series, can make electric current and the brightness of each group light fixture accurately identical.In addition, lamp driving device of the present invention more can utilize lower-cost modular mode to realize the lamp driving device that is applied to different lamps number, and the mode at lower cost of manufacturer that can make to manufacture the lamp driving device of different lamps number realizes.
The present invention must be appointed and be executed that craftsman thinks and be to modify as all by those skilled in the art, however scopes of de-as attached claim institute wish protection.
Claims (13)
1. a lamp driving device, in order to drive a plurality of light fixtures, comprising:
One power-switching circuit, it is for an input voltage being converted to one first direct voltage, and one first electric current of current value is determined in fact in output; And
Organize light fitting connecting seats, an anode and a negative terminal of each group light fitting connecting seat are electrically connected light fixture corresponding to described a plurality of light fixtures more, and export the light fixture that an output voltage and outputs current to the corresponding electric connection of described a plurality of light fixture;
Wherein, described many group light fitting connecting seats interconnect with electrical series system, and this output voltage between the positive and negative terminal of each group light fitting connecting seat is obtained by this first direct voltage dividing potential drop, and this output current of each group light fitting connecting seat output is identical in fact; And
Wherein, the anode of first group of light fitting connecting seat of described many group light fitting connecting seats is electrically connected at one first output of this power-switching circuit, the negative terminal of last group light fitting connecting seat of described many group light fitting connecting seats is electrically connected at one second output of this power-switching circuit, and first group of light fitting connecting seat of described many group light fitting connecting seats and the electrical connection between last group light fitting connecting seat are that the negative terminal of upper one group of light fitting connecting seat and the anode of next group light fitting connecting seat are electrically connected.
2. lamp driving device as claimed in claim 1, the feedback reverting circuit that wherein this power-switching circuit is single-stage, active clamping feedback reverting circuit or resonant mode change-over circuit.
3. lamp driving device as claimed in claim 1, wherein this power-switching circuit is constant current type, this first electric current of current value is determined in fact in output, and this first direct voltage of exporting equals the described sum total of organizing this output voltage of light fitting connecting seats more.
4. lamp driving device as claimed in claim 1, more comprises a circuit overcurrent protection, is electrically connected between this power-switching circuit and described many group light fitting connecting seats, in order to prevent this first electric current generation overcurrent of this power-switching circuit output.
5. lamp driving device as claimed in claim 4, wherein this circuit overcurrent protection comprises:
One switching circuit, is electrically connected at this lamp driving device and exports on the current circuit of this first electric current; And
One current detection circuit, be electrically connected at outlet side and this switching circuit of this power-switching circuit, in order to this first electric current according to this current detection circuit of flowing through is corresponding, produces one first and control voltage to the control end of this switching circuit, and first control voltage control this switching circuit conducting or cut-off by this.
6. lamp driving device as claimed in claim 5, wherein this switching circuit comprises:
One first switch element, is electrically connected at this lamp driving device and exports on the current circuit of this first electric current; And
One body diode, is electrically connected between two electric current conduction terminals of this first switch element.
7. lamp driving device as claimed in claim 6, wherein this current detection circuit comprises:
One first resistance, one end of this first resistance is electrically connected to one first output of this power-switching circuit, and the other end of this first resistance is electrically connected to the first node being electrically connected with this switching circuit;
One second resistance, is electrically connected in series with this switching circuit, produces one second and control voltage while making this first electric current flow through this second resistance;
One second switch element, the control end of this second switch element is electrically connected at a Section Point, one electric current conduction terminals of this second switch element is electrically connected to this first node, and another electric current conduction terminals of this second switch element is electrically connected to one second output of this power-switching circuit; And
One first zener diode component, this first Zener diode is electrically connected between this first node and this Section Point, in order to this first control voltage swing between this first node of strangulation and this Section Point.
8. lamp driving device as claimed in claim 1, more comprise a plurality of output protection circuits, it is electrically connected in parallel with each group light fitting connecting seat respectively, when described one of them damage of a plurality of light fixtures makes this light fixture, be that open-circuit condition or user are not electrically connected light fixture in described many group light fitting connecting seats one group of light fitting connecting seat wherein, while making the magnitude of voltage of this output voltage that should light fitting connecting seat surpass a specified running range of voltage values, this corresponding output protection circuit action of described a plurality of output protection circuits, by the bypass to should light fitting connecting seat to stop should light fitting connecting seat output current.
9. lamp driving device as claimed in claim 8, this output protection circuit of wherein said a plurality of output protection circuits comprises:
One the 3rd switch element, is electrically connected between the positive and negative end of this corresponding group light fitting connecting seat of described many group light fitting connecting seats; And
One circuits for triggering, be electrically connected at the positive and negative end of this corresponding group light fitting connecting seat and the control end of the 3rd switch element of described many group light fitting connecting seats, in order to organize the whether conducting of this output voltage control the 3rd switch element of light fitting connecting seat according to corresponding this;
Wherein, when this this output voltage of organizing light fitting connecting seat of correspondence surpasses this specified running range of voltage values; these circuits for triggering transmit a triggering signal to the control end of the 3rd switch element and control the 3rd switch element conducting, make this corresponding output protection circuit action and by this group light fitting connecting seat bypass of correspondence to stop output current.
10. lamp driving device as claimed in claim 9, wherein these circuits for triggering comprise: one the 3rd resistance, one the 4th resistance and one second Zener diode, and between the positive and negative end of this group light fitting connecting seat of correspondence, form series connection electrical connection, as the use of current limliting and dividing potential drop.
11. lamp driving devices as claimed in claim 10, wherein these circuits for triggering more comprise: the delay circuit that one the 5th resistance and an electric capacity form, and be electrically connected between the control end of these circuits for triggering and the 3rd switch element.
12. lamp driving devices as claimed in claim 8, realize in the mode that comprises an output module, and wherein this output module comprises: described a plurality of light fitting connecting seats, or optionally more comprise described a plurality of output protection circuit.
13. lamp driving devices as claimed in claim 1, below the minimum voltage value of the specified running magnitude of voltage of wherein said a plurality of light fitting connecting seats lower than human-body conduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010282727.5A CN102404903B (en) | 2010-09-13 | 2010-09-13 | Lamp driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010282727.5A CN102404903B (en) | 2010-09-13 | 2010-09-13 | Lamp driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102404903A CN102404903A (en) | 2012-04-04 |
| CN102404903B true CN102404903B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010282727.5A Active CN102404903B (en) | 2010-09-13 | 2010-09-13 | Lamp driving device |
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| CN (1) | CN102404903B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103379694B (en) * | 2012-04-17 | 2016-08-03 | 台达电子工业股份有限公司 | Lamp driving device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2720679Y (en) * | 2004-06-29 | 2005-08-24 | 沛勤科技股份有限公司 | Series electric connector |
| CN100484345C (en) * | 2005-10-13 | 2009-04-29 | 光纤设计公司 | Decoration lamp string with rectification circuit |
| KR100679410B1 (en) * | 2006-04-04 | 2007-02-06 | 엘지.필립스 엘시디 주식회사 | Device for driving light emitting diode |
| CN201114866Y (en) * | 2007-09-28 | 2008-09-10 | 东莞市精航科技有限公司 | Unit circuit for LED lamp |
| CN101742758A (en) * | 2008-11-27 | 2010-06-16 | 台达电子工业股份有限公司 | Lighting driving system with dimming function |
| CN201319688Y (en) * | 2008-12-10 | 2009-09-30 | 广州南科集成电子有限公司 | Constant current and voltage circuit |
| CN201335340Y (en) * | 2009-01-21 | 2009-10-28 | 四川九洲铭伟半导体照明有限公司 | Led illuminating device |
| CN201407622Y (en) * | 2009-05-20 | 2010-02-17 | 吴钟栅 | Led lamp |
| CN201518547U (en) * | 2009-10-29 | 2010-06-30 | 陈寇忠 | Semi-conductor lighting constant-current power supply |
| CN101778506B (en) * | 2009-12-28 | 2013-07-03 | 英飞特电子（杭州）股份有限公司 | Drive circuit for realizing accurate constant current of multiple LEDs |
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| CN102404903A (en) | 2012-04-04 |
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