CN109699100A - Use the LED driving circuit of high voltage - Google Patents
Use the LED driving circuit of high voltage Download PDFInfo
- Publication number
- CN109699100A CN109699100A CN201710994518.5A CN201710994518A CN109699100A CN 109699100 A CN109699100 A CN 109699100A CN 201710994518 A CN201710994518 A CN 201710994518A CN 109699100 A CN109699100 A CN 109699100A
- Authority
- CN
- China
- Prior art keywords
- mentioned
- light emitting
- emitting diode
- diode
- negative terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
Abstract
One LED driving circuit includes a light emitting diode with the light emitting diode of multiple series connections, is coupled a voltage and is charged and discharged unit, and with the alternating voltage power supply after the rectification of input ac voltage.One controllable current limiting unit or a switch combine a current limiting unit and are communicated to ground for the light emitting diode.The voltage is charged and discharged unit, and there are the first and second diodes to be connected to the light emitting diode, with a storage, the charge path of first diode is flowed through with formation one and flows through the discharge path of the second diode, to provide the condenser voltage of stable state, to reduce the light emitting diode quantity of required series connection in light emitting diode.
Description
Technical field
Lighting device of the present invention in relation to being based on light emitting diode (LED), it is especially a kind of to use high input voltage, it is applicable in
In the lighting device based on light emitting diode, and the driving circuit of low cost.
Background technique
In recent years, it because of power savings advantages, has been developed and has been disposed using the light emitting diode illuminating apparatus of high voltage, with
Replace traditional incandescent lamp and fluorescent lamp.
Current vs voltage (IV) characteristic curve of light emitting diode is similar to general general-purpose diode, when being added on luminous two
When the voltage of pole pipe is less than the forward voltage of diode, only very small electric current passes through light emitting diode.When voltage is more than just
When to voltage, then it is significantly increased by the electric current of light emitting diode.In general, in most of opereating specifications, based on luminous two
The luminous intensity of the lighting device of pole pipe is directly proportional with the electric current passed through, but is operated then not such in high current.Usually
The driving device of lighting device design based on light emitting diode is all based on one constant electric current of offer, to send out
The service life of stable light and extension light emitting diode out.
In order to improve the brightness of the lighting device based on light emitting diode, multiple light emitting diodes are usually connected on one
Rise, formed a lighting unit based on light emitting diode, and multiple lighting units based on light emitting diode can more into
One step is cascaded, and forms a lighting device.Operating voltage required for each lighting device usually depends on illumination
The forward voltage of light emitting diode in unit, how many light emitting diode in each lighting unit, each lighting unit are
How interconnected and each lighting unit is how to receive the voltage from power supply in lighting device.
Many technologies, which have been developed that, makes the lighting device of light emitting diode be able to use such as 110 volts of alternating voltages
Or the operating voltage of 220 volts of alternating voltages, without using voltage conversion device.In general, luminous two in lighting device
Pole pipe includes one or more LED lighting units, and each LED lighting unit is further divided into multiple shine
Diode section, each light-emitting diodes pipeline section can be selectively turned on or be cut off by relevant switch or current source, and with
Operation alternating voltage increase or decrease, control switch or current source are come with controller.
One uses high voltage such as 110 volts of alternating voltages or 220 volts of alternating voltages, and without using voltage conversion device
The shortcomings that LED driving circuit first is that, be connected in series in the total of the light emitting diode in LED driving circuit
Number must be quite big, so that the forward voltage for being connected across light emitting diode is little too much unlike the high input voltage applied,
To keep enough efficiency, excessive power loss is avoided.In other words, it is connected in series in LED driving circuit
The sum of light emitting diode is decided by that the size of high input voltage, the cost of light-emitting diode assembly are also improved because of high voltage.
As more and more lighting apparatus based on light emitting diode are applied to using high input voltage as the highlighted of power supply
It spends in lighting apparatus, designs a kind of driving device, reduce the sum for the light emitting diode that must be connected in series, and can provide
The ac high voltage for the power supply that the use of good efficiencies and low cost is easy to get on wall is input voltage, has been formed non-
Normal necessary tight demand.
Summary of the invention
The present invention is provided one kind and can directly be effectively driven using a high AC-input voltage and connect fewer number of
Concatenated light emitting diode, to reduce the LED driving circuit of cost.Therefore, light emitting diode of the invention driving
Circuit includes the light emitting diode between its anode of a light emitting diode and negative terminal with multiple series connections, is coupled one
Voltage is charged and discharged unit, and with the alternating voltage power supply after the rectification of input ac voltage.
According to the present invention, above-mentioned voltage is charged and discharged unit, and there is its anode of first diode to be connected to above-mentioned shine
The negative terminal of diode, its negative terminal of the second diode are connected to the anode and a storage electricity of above-mentioned light emitting diode
Container.A charge path is formed via light emitting diode and first diode, and forms one via the second diode and puts
Power path, to provide the condenser voltage of one stable state of storage, reduction must be connected in series in light-emitting diodes
The quantity of light emitting diode in pipe unit.
One controllable current limiting unit is for controlling the electric current for flowing through light emitting diode and storage.Storage electricity
Container has the charging stage and above-mentioned controllable current limiting unit should not be switched on during the charging stage.If exchange input
Voltage is 60Hz, between the charging stage of the storage, and the conducting phase of above-mentioned controllable current limiting unit when
Between gap be at least 13.78 microseconds, if AC-input voltage be 50Hz, which is at least 16.53 microseconds.
In the first preferred embodiment of the present invention, light emitting diode is limited with the controllable current by controller control
Unit is connected in series.The plus end of storage and the negative terminal of first diode and the in unit are charged and discharged in voltage
The anode of two diodes connects.It is charged and discharged in unit in voltage, a current limiting unit is by the negative terminal of storage
Ground connection.Electric current in discharge path flows through the parasitic reverse current path of current limiting unit from ground terminal and discharges.
In the second preferred embodiment of the present invention, the plus end of storage is connected to the anode of the second diode,
And the negative terminal of storage is then grounded.It is charged and discharged in unit in voltage, current limiting unit is connected to the one or two pole
Between the negative terminal of pipe and the plus end of storage.Therefore, the electric current in discharge path is not required to via current limiting unit
Parasitic reverse current path and discharge.
In the third preferred embodiment of the present invention, LED driving circuit is in addition to being charged and discharged unit in voltage
In also there is third diode, positive ending grounding and negative terminal that negative terminal is connected to storage makes during discharge regime,
Electric current is able to bypass except current limiting unit, identical as first preferred embodiment.Electric current in discharge path flows through third
Diode, rather than the parasitic reverse current path of current limiting unit, to reduce power loss.
In the fourth preferred embodiment of the present invention, LED driving circuit is similar to third preferred embodiment.So
And be charged and discharged in unit in voltage, the negative terminal of storage is connected to above-mentioned current limit via the 4th diode
Unit, so that the electric current in discharge path is completely without flow through current limiting unit.
In the fifth preferred embodiment of the present invention, the controllable current limiting unit of light emitting diode is connected to by one
Switch and the first current limiting unit replace, with the controller on and off switch.In addition, being charged and discharged in voltage single
In member, there is the second current limiting unit to be connected between the plus end of storage and the anode of above-mentioned second diode, and
And the negative terminal of storage is connected to the first current limiting unit rather than is grounded.As a result, the electric current of discharge path be through
A discharge loop is flowed through by above-mentioned switch and is discharged, not by ground terminal.
In the sixth preferred embodiment of the present invention, it is connected to the controllable current limiting unit of light emitting diode also class
It is similar to the 5th preferred embodiment, is substituted by a switch and the first current limiting unit.But unit is charged and discharged in voltage
Interior, the second current limiting unit is removed, and the anode of above-mentioned second diode is being directly connected to storage just
Terminal.
In addition, the negative terminal and one the 4th diode that there is a third diode to be connected to storage from ground terminal again
The first current limiting unit is connected to from the negative terminal of storage.In other words, in the 6th preferred embodiment, charging and
Discharge path shares the first above-mentioned current limiting unit.
Detailed description of the invention
Figure 1A shows that the light emitting diode using high input voltage of first preferred embodiment according to the present invention drives
The block diagram of circuit.
Figure 1B shows the charging and discharging path of LED driving circuit shown in figure 1A.
Fig. 2 shows the steady-state voltage of the storage in LED driving circuit shown in figure 1A
Figure, including charging, the stage for keeping and discharging.
Fig. 3 shows another stable state of the storage in LED driving circuit shown in figure 1A
Voltage pattern, including charging, the stage for keeping and discharging.
Fig. 4 A show can after the rectification of LED driving circuit shown in figure 1A alternating voltage and shine
Additional light emitting diode is added between the anode of diode to reduce the caused excessive power loss of charging.
Fig. 4 B show can the light emitting diode of LED driving circuit shown in figure 1A negative terminal and
Additional light emitting diode is added between controllable current limiting unit to reduce the caused excessive power loss of electric discharge.
Fig. 5 shows a steady-state voltage figure of LED driving circuit shown in figure 1A, controllable current limitation
It is not be overlapped between the charging stage of storage during the conducting of the control signal and controllable current limiting unit of unit
Time.
Fig. 6 A shows that the light emitting diode according to the second, preferred embodiment of the present invention using high input voltage drives
The block diagram of circuit.
Fig. 6 B shows the charging and discharging path of LED driving circuit shown in Fig. 6 A.
Fig. 7 A shows that the light emitting diode using high input voltage of third preferred embodiment according to the present invention drives
The block diagram of circuit.
Fig. 7 B shows the charging and discharging path of LED driving circuit shown in Fig. 7 A.
Fig. 8 A shows that the light emitting diode using high input voltage of the 4th preferred embodiment according to the present invention drives
The block diagram of circuit.
Fig. 8 B shows the charging and discharging path of LED driving circuit shown in Fig. 8 A.
Fig. 9 A shows that the light emitting diode using high input voltage of the 5th preferred embodiment according to the present invention drives
The block diagram of circuit.
Fig. 9 B shows the charging and discharging path of LED driving circuit shown in Fig. 9 A.
Figure 10 A shows that the light emitting diode using high input voltage of the 6th preferred embodiment according to the present invention drives
The block diagram of circuit.
Figure 10 B shows the charging and discharging path of LED driving circuit shown in Figure 10 A.
Wherein, the reference numerals are as follows:
100,600,700,800,900,1000 voltages are charged and discharged unit
101,601,701,801,901,1001 light emitting diode
102,602,702,802 controllable current limiting unit
103,603,703,803,903,1003 controller
104,604,704,804,904,1004 storage
105,605,705,805,902,905,1002 current limiting unit
401,402 light emitting diode
906,1006 switch
Specific embodiment
This specification provides attached drawing, be understood the present invention can more further, while attached drawing also constitutes this specification
A part.The attached drawing shows the embodiment of the present invention, and together with specification, for explaining the principle of the invention.
The light emitting diode using high input voltage that Figure 1A shows first preferred embodiment according to the present invention drives electricity
The block diagram on road.In the present embodiment, LED driving circuit includes that there are multiple light emitting diodes to be connected in series, by handing over
The light emitting diode 101 of alternating voltage power supply after flowing the rectification of input voltage.Light emitting diode 101 has anode
Alternating voltage and negative terminal after being connected to rectification are connected to a controllable current that ground terminal is controlled and connected to by controller 103
Limiting unit 102.
Light emitting diode 101 is charged and discharged unit 100 with voltage and is coupled, and voltage is charged and discharged unit 100 and wraps
Include at least two diode D1 and D2 and storage 104.As shown in Figure 1A, diode D1 has an anode connection
The plus end of storage 104 is connected to the negative terminal of light emitting diode 101 and a negative terminal.Diode D2 has
One negative terminal is connected to the anode of light emitting diode 101 and an anode is connected to the plus end of storage 104.?
Voltage is charged and discharged in unit 100, and there is storage 104 negative terminal to be connected to a current limit connecting with ground terminal
Unit 105.
Figure 1B shows the charge path and discharge path of LED driving circuit.For simplicity, below
Description in, it is assumed that two diodes D1 and D2 are the ideal diodes with zero forward voltage.Alternating current after rectification
When pressure adds the voltage of storage 104 greater than the forward voltage across light emitting diode 101, storage 104
It is electrically charged, so the voltage of storage 104 increases.Charging current is flowed through by light emitting diode 101, diode
D1, storage 104, and the current limiting unit 105 of limitation charging current are formed by charge path.
When alternating voltage after rectification is less than the voltage of storage 104, in 101 anode of light emitting diode
Voltage is identical with condenser voltage.In this time, if controllable current limiting unit 102 is switched on, storage
104 are discharged, and condenser voltage will decline with electric discharge.Discharge current flows through the parasitism including current limiting unit 105
Reverse current path, storage 104, diode D2, light emitting diode 101 and controllable current limiting unit 102
Discharge path.If controllable current limiting unit 102 is closed, the voltage of storage 104 will be remained unchanged.
In the present invention, as shown in Fig. 2, storage 104 is according to the conducting and closing of controllable current limiting unit 102
It is charged and discharged, therefore the voltage of storage 104 reaches stable state.Alternating voltage after rectification increases to it
Voltage value is than the forward voltage V across light emitting diode 101LEDAlong with the voltage V of storage 104cap,lowIt is bigger
A point when, storage 104 enter the charging stage, until rectification after alternating voltage be reduced to its voltage value be less than across
The forward voltage of light emitting diode 101 adds the voltage V of storage 104cap,highB point.At this point, storage capacitance
Device 104 enters the holding stage.
Alternating voltage after rectification continues to drop to the voltage value in the anode of light emitting diode 101, is identical to
The voltage V of storage 104cap,highC point when, storage 104 enter discharge regime, until rectification after alternating current
Pressure increases to specific capacitance device voltage Vcap,lowIt is also big, that is, D point.At this moment, the electricity on the anode of light emitting diode 101
Pressure value is the same as the alternating voltage after rectification.
From the steady-state voltage figure of storage 104 shown in Fig. 2, it can be seen that if controllable current limits
When alternating voltage of the unit 102 after rectification reaches C point or before be switched on, storage 104 starts electric discharge and enters to put
The electric stage.If be closed when alternating voltage of the controllable current limiting unit 102 after rectification reaches D point or later, storage electricity
Container 104 stops discharging and enters the holding stage.
Fig. 3 shows another steady-state voltage figure of storage 104.The steady-state voltage figure of Fig. 2 and Fig. 3
Difference is the time point for being controllable current limiting unit 102 and being turned on and off.As shown in figure 3, controllable current limitation is single
Member 102 is connected after the alternating voltage after rectification reaches C point, and storage 104 is made to enter discharge regime, and is being rectified
Alternating voltage afterwards is closed before reaching D point, and storage 104 is made to enter the holding stage.
It is understood that controllable current limiting unit 102 can also when the alternating voltage after rectification reaches C point or before
Conducting makes storage 104 enter discharge regime, and the alternating voltage after rectification is closed before reaching D point, makes storage electricity
Container 104 enters the holding stage.Similar, controllable current limiting unit 102 can also reach C point in the alternating voltage after rectification
It is connected later, storage 104 is made to enter discharge regime, and close when the alternating voltage after rectification reaches D point or later,
Storage 104 is set to enter the holding stage.
If controllable current limiting unit 102 turns on before the alternating voltage after rectification reaches C point, make storage capacitance
Device 104 enters discharge regime, or the alternating voltage after rectification has reached 102 ability of controllable current limiting unit after D point
It closes, storage 104 is made to will lead to higher electricity because of the conducting of controllable current limiting unit 102 into the holding stage
It presses across on controllable current limiting unit 102, that is, the negative terminal of light emitting diode 101 has higher voltage, this
Lead to higher power loss.The advantages of in the case where above-mentioned higher power loss is, the circuit design of controller 103 can be with
It is simplified.
Friendship according to the present invention, in order to meet the charged state in LED driving circuit shown in FIG. 1, after rectification
The crest voltage V of galvanic electricity pressureAC, peakHave to be larger than the forward voltage V of light emitting diode 101LEDIn addition storage 104
Voltage VCAP, that is, VAC, peak>=VLED+VCAP.On the other hand, in order to meet discharge condition, storage 104
Voltage VCAPMust be bigger than the forward voltage of light emitting diode 101, that is, VCAP>=VLED。
Under conditions of two voltages from the above description, it can be deduced that VAC, peak>=VLED+VLED, that is, VLED≤
VAC, peak/2.As can be seen that have according to the present invention voltage be charged and discharged unit 100 be linked to light emitting diode 101 it
Afterwards, the quantity of the light emitting diode of the light emitting diode 101 in the LED driving circuit in Fig. 1 can be subtracted
It is few.In other words, it is charged and discharged unit 100 compared with voltage not of the invention, and the alternating voltage after rectifying is applied to hair
The general traditional type LED driving circuit of optical diode unit 101, hair of the present invention in light emitting diode 101
The quantity of optical diode only needs half.
It is worth noting that if the quantity in the light emitting diode of light emitting diode 101 is excessively reduced, it may
Two kinds of situations occur.In the first scenario, condenser voltage VCAPThan the forward voltage V of light emitting diode 101LEDSlightly
Greatly.In this case, power loss when electric discharge is low, but it will cause excessive power losses for charging.It is filled to reduce
The power loss of electricity, can be as shown in Figure 4 A, addition of connecting between the alternating voltage and light emitting diode 101 after rectification
Additional light emitting diode 401.
In second situation, condenser voltage VCAPCompare VAC, peak-VLEDIt is smaller, in this case, storage
104 are charged to higher voltage, because charging caused by power loss it is low, but discharge it will cause excessive power losses.
, can be as shown in Figure 4 B in order to reduce the power loss of electric discharge, it is limited in the negative terminal and controllable current of light emitting diode 101
Additional light emitting diode 402 is inserted into series connection between unit 102.
In above-mentioned two situations, if the forward voltage of additional light emitting diode is VLED, extra, driving circuit need to
Meet condition VLED+VLED, extra≤VAC, peak-VLED.Because reducing power loss, and keep light emitting diode
The efficiency of driving circuit increases the additional light emitting diode such as Fig. 4 A and 4B, needs additional cost.Therefore it excessively reduces
Light emitting diode quantity in light emitting diode 101, may will increase rather than reduce LED driving circuit
Totle drilling cost.
In the present invention, in the worst case, it is connected in series in light-emitting diodes in light emitting diode 101 and additional
The sum of the light emitting diode of pipe, preferably than meeting optimum state, that is, V as described aboveLED≤ VAC, peakHair when/2
Optical diode quantity, increases no more than 80%.In other words, under conditions of worst case, it is therefore desirable to meet VLED+
VLED, extra=1.8*VAC, peak/ 2=0.9*VAC, peak.Under these conditions, V can be exportedLED>=VAC, peak/ 10 must be able to by
Meet.Thus, it is supposed that the forward voltage of each light emitting diode is VF, the hair that is connected in series in light emitting diode 101
The quantity N of optical diodeLED, it is necessary to it is in following expressed range:
WhereinSystem indicates the lower limit integer of x.
According to the present invention, the voltage value in order to avoid excessive power loss, on the negative terminal of light emitting diode 101
When becoming too high, controllable current limiting unit 102 be must be turned off.Therefore, it is had reached surely in the voltage of storage 104
After determining state, the operation of controller 103 must satisfy the control signal of controllable current limiting unit 102 as shown in Figure 5
Two conditions.
First condition is that controllable current limiting unit 102 must close during the charging stage of storage 104.
In other words, the switching time of the Push And Release of controllable current limiting unit 102 must be in the holding stage of storage 104
Occur.As shown in figure 5, control signal must close controllable current limiting unit before the alternating voltage after rectification reaches A point
102, controllable current limiting unit 102 is connected after reaching B point in the alternating voltage after rectification.As can be seen that controllable current limitation
It cannot be Chong Die with the charging stage of storage 104 during the conducting of unit 102.
Second condition is that above-mentioned nonoverlapping time must be sufficiently large, just can be reduced the holding stage because of capacitor 104
Caused by power loss.By nonoverlapping time be zero worst case caused by the basis of added power dissipation, the present invention
In nonoverlapping time must arrive greatly be at least enough to reduce 10% of added power dissipation caused by above-mentioned worst case with
On, it could be good.
Because power loss caused by the holding stage of storage 104 is proportional to shadow region shown in fig. 5, can
To find out, the voltage of storage 104 is lower, and holding phases-time is shorter and shadow region is also smaller.Lower electricity
Condenser voltage also implies that the quantity for the light emitting diode being connected in series in light emitting diode 101 can be less.Therefore,
The lower limit of nonoverlapping time in the present invention is to be decided by VCAP=VLED=VAC, peak/10。
It for simplicity, can be approximately a triangle by shadow region shown in fig. 5.In the AC-input voltage of 60Hz
In the case where, the lower limit of nonoverlapping time is about equal to 13.78 microseconds.If AC-input voltage is 50Hz, it is not overlapped
The lower limit of time be about equal to 16.53 microseconds.
Fig. 6 A shows the light emitting diode according to the second, preferred embodiment of the present invention using high input voltage and drives
The block diagram of circuit.In the present embodiment, LED driving circuit includes that there are multiple light emitting diodes to be connected in series, by
The light emitting diode 601 of alternating voltage power supply after the rectification of AC-input voltage.Similar to shown in Figure 1A first
Preferred embodiment, light emitting diode 601 have anode be connected to rectification after alternating voltage and negative terminal be connected to one by
Controller 603 is controlled and connected to the controllable current limiting unit 602 of ground terminal.
The positive and negative terminal of light emitting diode 601 is connected to two diodes D1 and D2.As shown in Figure 6A, it is similar to figure
1A, diode D1 are connected to the negative terminal of light emitting diode 601 with an anode and a negative terminal is connected to current limit list
One end of member 605.The anode that there is diode D2 a negative terminal to be connected to light emitting diode 601.Storage 604 is just
Terminal is connected to the anode of diode D2 and the other end of current limiting unit 605, and the negative terminal of storage 604 then connects
To ground.
It is charged and discharged in unit 600 from the voltage that can be seen that in Fig. 6 A in the second preferred embodiment, current limit list
Member 605 is connected between the negative terminal of first diode D1 and the plus end of storage 604.Therefore, in discharge path
Electric current needs not flow through the parasitic reverse current path of current limiting unit.
Fig. 6 B shows the charge path of the LED driving circuit of the second preferred embodiment shown in Fig. 6 A and puts
Power path.As shown in Figure 6B, the charge path of storage 604 is by light emitting diode 601, diode D1, electric current limit
Unit 605 processed and storage 604 are formed.Discharge path then includes storage 604, diode D2, shines two
Pole pipe unit 601 and controllable current limiting unit 602.
The embodiment this have the advantage that, because the negative terminal of storage 604 is grounded, discharge path is disobeyed
By the parasitic reverse current path of current limiting unit 605, to reduce the power loss in electric discharge.
The light emitting diode using high input voltage that Fig. 7 A shows third preferred embodiment according to the present invention drives
The block diagram of circuit.In the present embodiment, it is charged and discharged in unit 700 other than increased diode D3 in addition in voltage, hair
Optical diode driving circuit is almost identical as first preferred embodiment shown in figure 1A.
LED driving circuit includes that there are multiple light emitting diodes to be connected in series, by the rectification of AC-input voltage
The light emitting diode 701 of alternating voltage power supply afterwards, the controllable current limiting unit 702 controlled by controller 703, storage
Capacitor 704 and current limiting unit 705.In addition to the diode D1 and D2 of the first preferred embodiment that shows in figure 1A, two
Pole pipe D3 is connected to the negative terminal of storage 704 from ground terminal, in parallel with current limiting unit 705.
Fig. 7 B shows the charge path of the LED driving circuit of third preferred embodiment shown in Fig. 7 A and puts
Power path.As shown in Figure 7 B, the charge path of storage 704 is identical as charge path shown in Figure 1B.However electric discharge road
Diameter is then by diode D3, storage 704, diode D2, light emitting diode 701 and controllable current limiting unit
702 are constituted.
The embodiment this have the advantage that, because voltage, which is charged and discharged in unit 700, diode D3, reduces and flows through
The discharge current in the parasitic reverse current path of current limiting unit 705, to reduce the power loss in electric discharge.
The light emitting diode using high input voltage that Fig. 8 A shows the 4th preferred embodiment according to the present invention drives
The block diagram of circuit.Negative terminal and electricity of the embodiment in addition to the storage 804 being charged and discharged in voltage unit 800
Stream limiting unit 805 between increase a diode D4 and diode D3 be connected to storage 804 negative terminal it
Outside, it is very similar to third preferred embodiment shown in Fig. 7.
Fig. 8 B shows the charge path of the LED driving circuit of the 4th preferred embodiment shown in Fig. 8 A and puts
Power path.As can be seen that the charge path of storage 804 is by light emitting diode 801, diode D1, storage capacitance
Device 804, diode D4 and current limiting unit 805 are formed.The discharge path of storage 804 then includes diode
D3, storage 804, diode D2, light emitting diode 801 and controllable current limiting unit 802.Controller 803 is controlled
Controllable current limiting unit 802 processed is charged and discharged storage 804.Diode D4 prevents discharge current from flowing through electric current
The parasitic reverse current path of limiting unit 805.
The light emitting diode using high input voltage that Fig. 9 A shows the 5th preferred embodiment according to the present invention drives
The block diagram of circuit.In the present embodiment, LED driving circuit includes that there are multiple light emitting diodes to be connected in series, by
The light emitting diode 901 of alternating voltage power supply after the rectification of AC-input voltage.Light emitting diode 901 has one
Anode is connected to the alternating voltage after rectification and a negative terminal is connected to the first end of the switch 906 controlled by controller 903
Son, the first current limiting unit 902 are connected between the Second terminal and ground of switch 906.
The positive and negative terminal of light emitting diode 901 is respectively further connected to the negative terminal and diode D1 of diode D2
Anode.It is charged and discharged in unit 900 in voltage, the second current limiting unit 905 is connected to anode and two poles of diode D2
Between the negative terminal of pipe D1.The plus end of storage 904 is connected to the negative terminal of diode D1, and storage 904 is negative
Terminal is then connected to the Second terminal for the switch 906 being connected with current limiting unit 902.
Fig. 9 B shows the charge path and discharge path of LED driving circuit shown in Fig. 9 A.Storage
904 charge path is by light emitting diode 901, diode D1, storage 904 and the first current limiting unit 902
It is formed.Discharge path is then by the second current limiting unit 905, diode D2, light emitting diode 901,906 He of switch
Storage 904 is formed by.It should be noted that the discharge path in the 5th preferred embodiment is a discharge loop,
It is by 903 control switch 906 of controller to form a discharge loop without ground terminal.
The light emitting diode using high input voltage that Figure 10 A shows the 6th preferred embodiment according to the present invention drives
The block diagram of circuit.In the present embodiment, LED driving circuit includes that there are multiple light emitting diodes to be connected in series, by
The light emitting diode 1001 of alternating voltage power supply after the rectification of AC-input voltage.Light emitting diode 1001 has
One anode is connected to the alternating voltage after rectification and a negative terminal is connected to the first of the switch 1006 controlled by controller 1003
Terminal, and there is a current limiting unit 1002 to be connected between the Second terminal and ground terminal of switch 1006.
In the 6th preferred embodiment, diode D2's that the positive and negative terminal of light emitting diode 1001 is also connected to
Negative terminal and diode D1 anode.But voltage in the present embodiment is charged and discharged in unit 1000, the in Fig. 9 A
Two current limiting units 905 are removed, and the anode of diode D2 is directly connected to the anode of storage 1004
The negative terminal of son and diode D1.The negative terminal and diode D4 that the negative terminal of storage 1004 is connected to diode D3 are just
End.The negative terminal of diode D4 is connected to the Second terminal of switch 1006, and the anode of diode D3 is then connected to ground.
Figure 10 B shows the charge path and discharge path of LED driving circuit shown in Figure 10 A.Storage capacitance
The charge path of device 1004 is by light emitting diode 1001, diode D1, storage 1004, diode D4 and electric current limit
Unit 1002 processed is formed.Discharge path is then by diode D3, storage 1004, diode D2, light emitting diode list
Member 1001, switch 1006 and current limiting unit 1002 are formed by.It should be noted that charging in the 6th preferred embodiment
Identical current limiting unit 1002, and 1003 control switch 1006 of controller are shared with discharge path, to form electric discharge road
Diameter.
Although the present invention is only described by several preferred implementation examples above, those skilled in the art,
Apparent will be seen that still there are many accommodations and modification that do not describe, all without departing from Shen of the invention defined below
It please be within the scope of the patents.
Claims (18)
1. a LED driving circuit characterized by comprising
One light emitting diode, wherein there is multiple light emitting diodes to be connected in series, above-mentioned light emitting diode has just
End and negative terminal；
One controllable current limiting unit is connected to the negative terminal of above-mentioned light emitting diode with first end and second end is connected to
Ground；
One controller controls above-mentioned controllable current limiting unit；
One voltage is charged and discharged unit and links to above-mentioned light emitting diode, and above-mentioned voltage is charged and discharged unit and at least wraps
It includes:
One storage has plus end and negative terminal；
First diode has anode and negative terminal, and anode is connected to the negative terminal of above-mentioned light emitting diode；
Second diode is connected to the plus end of above-mentioned storage with anode and negative terminal is connected to above-mentioned light emitting diode
The anode of unit；
One via above-mentioned first diode and above-mentioned storage to the charge path on ground；With
One via above-mentioned storage and above-mentioned second diode discharge path；With
The anode that there is one AC-input voltage the alternating voltage after rectification to be connected to above-mentioned light emitting diode.
2. LED driving circuit according to claim 1, which is characterized in that the negative terminal of above-mentioned first diode connects
It is connected to the plus end of above-mentioned storage, and it further includes electric current limit that above-mentioned voltage, which is charged and discharged the charge path of unit,
Unit processed is connected to the negative terminal of above-mentioned storage with first end and second end is connected to ground.
3. LED driving circuit according to claim 2, which is characterized in that above-mentioned voltage is charged and discharged unit
Discharge path further include third diode have anode be connected to and negative terminal be connected to the negative terminal of above-mentioned storage.
4. LED driving circuit according to claim 1, which is characterized in that above-mentioned voltage is charged and discharged unit
It further include that there is a current limiting unit first end to be connected to the negative terminal of above-mentioned first diode and second end is connected to above-mentioned deposit
The plus end of storage container, and in above-mentioned charge path, the negative terminal of above-mentioned storage is connected to the ground.
5. LED driving circuit according to claim 1, which is characterized in that the negative terminal of above-mentioned first diode connects
It is connected to the plus end of above-mentioned storage, and above-mentioned voltage is charged and discharged unit further include:
Third diode has the negative terminal that anode is connected to ground and negative terminal is connected to above-mentioned storage；
4th diode has anode and negative terminal, and anode is connected to the negative terminal of above-mentioned storage；With
The negative terminal and second end that there is one current limiting unit first end to be connected to above-mentioned 4th diode are in above-mentioned charge path
In be connected to ground.
6. LED driving circuit according to claim 1, which is characterized in that in above-mentioned light emitting diode
Each light emitting diode to have forward voltage be V F, the crest voltage of the alternating voltage after above-mentioned rectification is VAC, peak, and
The sum for the light emitting diode being connected in series in above-mentioned light emitting diode is less than or equal toNamelyLower limit integer.
7. LED driving circuit according to claim 6, which is characterized in that in above-mentioned light emitting diode
The sum of the light emitting diode of series connection is greater than or equal toNamelyLower limit integer.
8. LED driving circuit according to claim 1, which is characterized in that above-mentioned storage has charging
Stage, and above-mentioned controllable current limiting unit is not switched in the above-mentioned charging stage.
9. LED driving circuit according to claim 8, which is characterized in that above-mentioned AC-input voltage is
60Hz, and the time slot between the charging stage of above-mentioned storage, and the conducting phase of above-mentioned controllable current limiting unit
At least 13.78 microseconds.
10. LED driving circuit according to claim 8, which is characterized in that above-mentioned AC-input voltage is
50Hz, and the time slot between the charging stage of above-mentioned storage, and the conducting phase of above-mentioned controllable current limiting unit
At least 16.53 microseconds.
11. a LED driving circuit characterized by comprising
One light emitting diode, wherein there is multiple light emitting diodes to be connected in series, above-mentioned light emitting diode has just
End and negative terminal；
One switch has first terminal and Second terminal, and first terminal is connected to the negative terminal of above-mentioned light emitting diode；
One controller controls above-mentioned switch；
First current limiting unit is connected to the Second terminal of above-mentioned switch with first end and second end is connected to ground；
One voltage is charged and discharged unit and links to above-mentioned light emitting diode, and above-mentioned voltage is charged and discharged unit and at least wraps
It includes:
One storage has plus end and negative terminal；
First diode is connected to the negative terminal of above-mentioned light emitting diode with anode and negative terminal is connected to above-mentioned storage capacitance
The plus end of device；
Second diode has anode and negative terminal, and negative terminal is connected to the anode of above-mentioned light emitting diode；
One charging circuit being grounded via above-mentioned first diode, above-mentioned storage and above-mentioned first current limiting unit
Diameter；With
One via above-mentioned storage and above-mentioned second diode discharge path；With
The anode that there is one AC-input voltage the alternating voltage after rectification to be connected to above-mentioned light emitting diode.
12. LED driving circuit according to claim 11, which is characterized in that above-mentioned voltage is charged and discharged single
Member further includes that there is the second current limiting unit first end to be connected to the plus end of above-mentioned storage and second end is connected to
The anode of above-mentioned second diode, and in above-mentioned charge path, the negative terminal of above-mentioned storage is connected to above-mentioned
The first end of one current limiting unit.
13. LED driving circuit according to claim 11, which is characterized in that the anode of above-mentioned second diode
It is connected to the plus end of above-mentioned storage, and above-mentioned voltage is charged and discharged unit further include:
Third diode has the negative terminal that anode is connected to ground and negative terminal is connected to above-mentioned storage；With
4th diode is connected to the negative terminal of above-mentioned storage with anode and negative terminal is connected to above-mentioned first electric current limit
The first end of unit processed.
14. LED driving circuit according to claim 11, which is characterized in that in above-mentioned light emitting diode
In each light emitting diode to have forward voltage be V F, the crest voltage of the alternating voltage after above-mentioned rectification is VAC, peak, and
The sum for the light emitting diode being connected in series in above-mentioned light emitting diode is less than or equal toNamelyLower limit integer.
15. LED driving circuit according to claim 14, which is characterized in that in above-mentioned light emitting diode
In the sum of light emitting diode that is connected in series be greater than or equal toNamelyLower limit integer.
16. LED driving circuit according to claim 11, which is characterized in that above-mentioned storage, which has, fills
The electric stage, and above-mentioned switch is not switched in the above-mentioned charging stage.
17. LED driving circuit according to claim 16, which is characterized in that above-mentioned AC-input voltage is
60Hz, and to be at least 13.78 micro- for the time slot between the charging stage of above-mentioned storage, and the conducting phase of above-mentioned switch
Second.
18. LED driving circuit according to claim 16, which is characterized in that above-mentioned AC-input voltage is
50Hz, and to be at least 16.53 micro- for the time slot between the charging stage of above-mentioned storage, and the conducting phase of above-mentioned switch
Second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710994518.5A CN109699100A (en) | 2017-10-23 | 2017-10-23 | Use the LED driving circuit of high voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710994518.5A CN109699100A (en) | 2017-10-23 | 2017-10-23 | Use the LED driving circuit of high voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109699100A true CN109699100A (en) | 2019-04-30 |
Family
ID=66225852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710994518.5A Pending CN109699100A (en) | 2017-10-23 | 2017-10-23 | Use the LED driving circuit of high voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109699100A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802303A (en) * | 2011-05-24 | 2012-11-28 | 日亚化学工业株式会社 | Light-emitting diode driving apparatus including charging/discharging capacitor |
| US20130026923A1 (en) * | 2011-07-28 | 2013-01-31 | Cree, Inc. | Solid state lighting apparatus and methods of forming |
| US20140049174A1 (en) * | 2011-03-28 | 2014-02-20 | Koninklijke Philips N.V. | Driving device and method for driving a load, in particular an led assembly |
| US20140265892A1 (en) * | 2013-03-12 | 2014-09-18 | Tsmc Solid State Lighting Ltd. | LED Linear Regulator Circuit with Improved Power Factor |
| CN107211508A (en) * | 2014-10-14 | 2017-09-26 | 首尔半导体株式会社 | The LED drive circuit that scintillation properties are improved and the LED light device including this |
-
2017
- 2017-10-23 CN CN201710994518.5A patent/CN109699100A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140049174A1 (en) * | 2011-03-28 | 2014-02-20 | Koninklijke Philips N.V. | Driving device and method for driving a load, in particular an led assembly |
| CN102802303A (en) * | 2011-05-24 | 2012-11-28 | 日亚化学工业株式会社 | Light-emitting diode driving apparatus including charging/discharging capacitor |
| US20130026923A1 (en) * | 2011-07-28 | 2013-01-31 | Cree, Inc. | Solid state lighting apparatus and methods of forming |
| US20140265892A1 (en) * | 2013-03-12 | 2014-09-18 | Tsmc Solid State Lighting Ltd. | LED Linear Regulator Circuit with Improved Power Factor |
| CN107211508A (en) * | 2014-10-14 | 2017-09-26 | 首尔半导体株式会社 | The LED drive circuit that scintillation properties are improved and the LED light device including this |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104868703B (en) | High-voltage converter without assists winding | |
| TWI454174B (en) | Led-based lighting devices and method for operating the same | |
| CN105230126A (en) | Use the LED drive circuit of doube bridge diode and comprise its LED light device | |
| CN103546027A (en) | Power supply, solid-state light-emitting element lighting device, and luminaire | |
| US9844123B2 (en) | Solid-state lighting operable with ballasts and line voltages without ambiguity | |
| CN103178707B (en) | Electrical power conversion device | |
| CN105025632A (en) | Light-emitting diode (LED) lamp capable of color modulation by switches and control circuit thereof | |
| CN102313163A (en) | The alternating-current light emitting diode luminescent device | |
| TWI633806B (en) | Led driving circuit using high voltage | |
| EP2480051A2 (en) | Lighting device and luminaire | |
| US8941318B2 (en) | Power supply for illumination and luminaire | |
| CN103379706B (en) | Driving circuit | |
| CN106304486A (en) | LED light device | |
| CN109699100A (en) | Use the LED driving circuit of high voltage | |
| CN107710872B (en) | LED light source with improved aura reduction | |
| US20200015333A1 (en) | Lighting device, system and method for controlling a lighting device | |
| CN205491296U (en) | A stepless control module for adjusting luminance of LED lamps and lanterns | |
| CN102762007A (en) | LED lamp and LED switch control device | |
| CN202503745U (en) | LED work-mode controlling means | |
| CN108124346B (en) | Light emitting diode driving device and illumination and fishing lamp using same | |
| CN105915086A (en) | High-efficiency AC/DC power supply circuit, and control method and power supply method thereof | |
| CN105282899B (en) | The drive circuit of the light emitting diode of low flicker and high power factor | |
| WO2019141613A1 (en) | Filament emulation circuit for a light emitting diode tube lamp | |
| US10004119B1 (en) | Low-cost LED driving circuit using high voltage | |
| CN218277202U (en) | Dimming control circuit for adjusting LED lamp in five-star hotel lighting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190430 |
|
| WD01 | Invention patent application deemed withdrawn after publication |