CN105282900B - The driving method of light emitting element driving circuit and light-emitting element circuit - Google Patents
The driving method of light emitting element driving circuit and light-emitting element circuit Download PDFInfo
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- CN105282900B CN105282900B CN201410275924.2A CN201410275924A CN105282900B CN 105282900 B CN105282900 B CN 105282900B CN 201410275924 A CN201410275924 A CN 201410275924A CN 105282900 B CN105282900 B CN 105282900B
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Abstract
The present invention proposes a kind of driving method of light emitting element driving circuit and light-emitting element circuit.Light emitting element driving circuit to drive with it is multiple series connection light-emitting components light-emitting element circuit.Light emitting element driving circuit changes the quantity of powered light-emitting component according to rectified input voltage, and light emitting element driving circuit includes：Switch module, current source circuit and total harmonic distortion (total harmonic distortion, THD) compensation circuit.Wherein, THD compensation circuits produce adjustment electric current according to rectified input voltage.Current source circuit so according to adjustment electric current, there is provided light-emitting component electric current gives the light-emitting component of conducting, to reduce total harmonic distortion.
Description
Technical field
The present invention relates to a kind of light emitting element driving circuit and the driving method of light-emitting element circuit, a kind of tool is particularly related to
There are the light emitting element driving circuit and light-emitting component electricity that total harmonic distortion (total harmonic distortion, THD) compensates
The driving method on road.
Background technology
Figure 1A show a kind of prior art light emitting diode (light emitting diode, LED) drive circuit 10 and
The schematic diagram of its interlock circuit.As shown in Figure 1A, LED drive circuit 10 includes on-off circuit 11, ON-OFF control circuit 12, with consolidating
Constant current source 13.For LED drive circuit 10 to drive LED circuit 20, wherein LED circuit 20 includes the LED of multiple series connection, such as schemes
Shown in 1A, the LED of this multiple series connection, it is divided into LED groups G1, G2, G3 and G4.On-off circuit 11 include switch S1, S2, S3, with
Tetra- switches of S4.As shown in Figure 1A, switch S1-S4 is electrically connected appropriate position in LED circuit 20, to control LED group
Group G1-G4.AC power 40 produces alternating voltage, and rectification circuit 30 carries out rectification to this alternating voltage, and produces such as Figure 1B institutes
The rectified input voltage Vin shown.It is according to rectified input voltage and LED drive circuit 10 drives the basic mode of LED circuit 20
Vin level, wherein different switch S1-S4 is turned on or be not turned on, and make the LED groups G1-G4 in LED circuit 20, wherein
One or more LED groups light.
For example, as in Figure 1B signal oscillogram illustrated, when rectified input voltage Vin level is less than level L1
When, switch S1-S4 is all not turned on, and LED groups G1-G4 is neither luminous；When rectified input voltage Vin level between level L1 with
Between L2, switch S1 conductings, switch S2-S4 is not turned on, and LED groups G1 lights；When rectified input voltage Vin level is between position
Between quasi- L2 and L3, switch S2 conductings, switch S1, S3-S4 are not turned on, and LED groups G1-G2 lights；As rectified input voltage Vin
Level between level L3 and L4, switch S3 conductings, switch S1-S2, be not turned on S4, LED groups G1-G3 lights；When
Rectified input voltage Vin level exceedes level L4, switch S4 conductings, and switch S1-S3 is not turned on, and LED groups G1-G4 lights.
Related LED drive circuit 10 refers to U.S. Patent No. 7,081,722 according to rectified input voltage Vin type of drive
Case and No. 2011/0273102 case of U.S. Patent Application No..
Wherein, fixed current source 13 provides the electric current of fixed size, so that one or more LED groups in LED groups G1-G4
When group is luminous, the electric current for flowing through LED therein is definite value.Signal waveform such as electric current I1 in Figure 1B is illustrated, no matter LED groups
When one or more LED groups are luminous in G1-G4, the electric current flowed through is all fixed, the position only in rectified input voltage Vin
Standard is when be less than level L1, that is, switchs in the case that S1-S4 is all not turned on, and electric current I1 is zero current.
For with the drive circuit of direct voltage drive LED circuit, the advantages of prior art LED drive circuit 10
It is rectified input voltage Vin need not be converted into DC voltage, the cost of manufacture can be saved；And work as rectified input voltage
The enough height of Vin frequency, naked eyes do not see the flicker of LED circuit 20 yet.And the shortcomings that prior art LED drive circuit 10, is,
Its total harmonic distortion (total harmonic distortion, THD) is higher.
In view of this, the present invention is directed to above-mentioned the deficiencies in the prior art, proposes a kind of light-emitting component with THD compensation
The driving method of drive circuit and light-emitting element circuit.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, proposes a kind of light emitting element driving circuit and hair
The driving method of optical element circuit, the i.e. hair with total harmonic distortion (total harmonic distortion, THD) compensation
The driving method of optical element drive circuit and light-emitting element circuit.
For the above-mentioned purpose, one of viewpoint is sayed, the invention provides a kind of light emitting element driving circuit, to drive
A dynamic light-emitting element circuit, the wherein light-emitting element circuit have the light-emitting component of multiple series connection, to receive rectification input electricity
Pressure, the light emitting element driving circuit include：One switch module, including multiple switch, coupled respectively with the corresponding light-emitting component,
According to the rectified input voltage, to determine to turn on the quantity of the light-emitting component；One current source circuit, with the switch module coupling
Connect, to according to an adjustment electric current, there is provided a light-emitting component electric current gives the light-emitting component of conducting, and wherein the light-emitting component electric current is non-
For fixed value, and at least part time has a substantially identical phase angle with the rectified input voltage in a cycle；And
One total harmonic distortion (total harmonic distortion, THD) compensation circuit, coupled with the current source circuit, to root
According to the rectified input voltage, the adjustment electric current is produced.
In wherein a kind of preferred embodiment, the adjustment electric current has a substantially identical phase with the rectified input voltage
Parallactic angle.
In wherein a kind of preferred embodiment, the THD compensation circuits include a voltage-current converter circuit, to should
Rectified input voltage is converted to THD compensation electric currents.
In wherein a kind of preferred embodiment, the THD compensation circuits further include：One setting electric current generation circuit, to
According to a reference signal, a setting electric current is produced；And an adder and substracter circuit, respectively with the voltage-current converter circuit and this set
Determine current generating circuit coupling, to compensate electric current and the setting electric current according to the THD, produce the adjustment electric current.
In wherein a kind of preferred embodiment, the voltage-current converter circuit includes：One input voltage sense circuit, use
To receive the rectified input voltage, an input voltage sample signal is produced；And a current mirror duplicate circuit, with the input voltage
Sensing circuit couples, according to the input voltage sample signal, to produce THD compensation electric currents.
In wherein a kind of preferred embodiment, the voltage-current converter circuit includes：One input voltage sense circuit, use
To receive the rectified input voltage, an input voltage sample signal is produced；One amplifying circuit, with the input voltage sense circuit coupling
Connect, according to the input voltage sample signal and a reference signal, to produce a switching current；And a current mirroring circuit, with
The amplifying circuit couples, according to the switching current, to produce THD compensation electric currents.
In wherein a kind of preferred embodiment, the voltage-current converter circuit includes：One input voltage sense circuit, bag
A bleeder circuit is included, the partial pressure to capture the rectified input voltage is used as an input voltage sample signal；One amplifying circuit, with
The input voltage sense circuit couples, according to the input voltage sample signal, to produce a switching current；An and current mirror
Circuit, coupled with the amplifying circuit, according to the switching current, to produce THD compensation electric currents.
In wherein a kind of preferred embodiment, the setting electric current generation circuit includes：One amplifying circuit, should to basis
Reference signal, produce a reference current；And a current mirroring circuit, coupled with the amplifying circuit, to according to the reference current,
Produce the setting electric current.
For the above-mentioned purpose, another viewpoint is sayed, the invention provides a kind of driving method of light-emitting element circuit, its
In the light-emitting element circuit there is the light-emitting components of multiple series connection, the driving method of the light-emitting element circuit includes：It is whole to provide one
Flow input voltage；According to the rectified input voltage, the quantity of powered light-emitting component is determined；According to the rectified input voltage,
An adjustment electric current is produced, wherein, the adjustment electric current has a substantially identical phase angle with the rectified input voltage；And according to
The adjustment electric current, there is provided a light-emitting component electric current gives powered light-emitting component, and it is fixed value that wherein the light-emitting component electric current is non-,
And at least part time has a substantially identical phase angle with the rectified input voltage in a cycle.
In wherein a kind of preferred embodiment, wherein this is according to the rectified input voltage, there is provided the step of the adjustment electric current
Suddenly include：According to the rectified input voltage, there is provided an input voltage sample signal；According to the input voltage sample signal, produce
One switching current；And by the switching current, be converted to the adjustment electric current.
In wherein a kind of preferred embodiment, this is according to the rectified input voltage, there is provided wraps the step of the adjustment electric current
Include：The rectified input voltage is converted into THD compensation electric currents；According to a reference signal, a setting electric current is produced；And according to
The THD compensates electric current and the setting electric current, produces the adjustment electric current.
In wherein a kind of preferred embodiment, this compensates electric current and the setting electric current according to the THD, produces adjustment electricity
The step of stream, includes：The THD compensation electric current and the setting electric current are added deduct computing, to produce the adjustment electric current.
In wherein a kind of preferred embodiment, THD compensation electric currents have with rectified input voltage matter with phase and amplitude
Waveform in the same direction.
In wherein a kind of preferred embodiment, the THD compensation electric current have with rectified input voltage Vin essence with mutually but
The reverse waveform of amplitude.
Below by specific embodiment elaborate, when be easier to understand the purpose of the present invention, technology contents, feature and its
The effect of reached.
Brief description of the drawings
Figure 1A show a kind of prior art light emitting diode (light emitting diode, LED) drive circuit 10 and
The schematic diagram of its interlock circuit；
Figure 1B shows the signal waveform schematic diagram of prior art LED drive circuit 10 and its interlock circuit；
One embodiment of Fig. 2A and 2B display present invention；
Second embodiment of Fig. 3 display present invention；
Fig. 4 shows third embodiment of the invention；
Fig. 5 A and 5B shows four embodiment of the invention；
The 5th embodiment of Fig. 6 A and 6B display present invention；
The 6th embodiment of Fig. 7 A and 7B display present invention；
The 7th embodiment of Fig. 8 A and 8B display present invention；
The 8th embodiment of Fig. 9 A and 9B display present invention；
The 9th embodiment of Figure 10 A-10C display present invention；
Figure 11 A-11E give a few examples how display current source circuit 120 according to adjustment electric current Id provides light-emitting component electric current
ILED。
Symbol description in figure
10LED drive circuits
11,111 on-off circuits
12,112 ON-OFF control circuits
13 fixed current sources
20 LED circuits
21 light-emitting element circuits
30 rectification circuits
40 AC powers
100 light emitting element driving circuits
110 switch modules
120 current source circuits
120a fixed current sources
130 THD compensation circuits
131 voltage-current converter circuits
131a, 131b current replication circuit
132 setting electric current generation circuits
133 adder and substracter circuits
150 current setting circuits
1311 input voltage sense circuits
1312,1313,1321 current mirroring circuits
1314,1317,1322 amplifying circuits
1323 impedance circuits
G1-G4LED groups
A1-A5 error amplifiers
Id adjusts electric current
ILED light-emitting component electric currents
Ir reference currents
Is setting electric currents
ITHD THD compensate electric current
L1-L4 levels
Q1-Q6 transistors
Ra-Rb, R1-R6 resistance
S1-S4 is switched
Vin rectified input voltages
Embodiment
Fig. 2A and 2B are referred to, shows one embodiment of the present invention.As shown in Figure 2 A, light emitting element driving circuit
100 to drive light-emitting element circuit 21, wherein, light-emitting element circuit 21 has the light-emitting component of multiple series connection, such as but not
It is limited to the LED for including multiple series connection, and the LED of this multiple series connection points are multiple LED groups, such as, but not limited to such as prior art
It is described, it is divided into G1, G2, G3 and tetra- LED groups of G4, as shown in Figure 2 A.Rectification circuit 30 produces rectified input voltage Vin.Need
Illustrate, light-emitting element circuit 21 is not limited to LED circuit 20 as shown in Figure 1A, only comprising single LED strip, light-emitting component electricity
Road 21 can also be by multiple LED strips LED array in parallel formed or other light-emitting component strings or light-emitting device array etc..Hair
Optical element circuit 21 receives rectified input voltage Vin, and light emitting element driving circuit 100 changes according to rectified input voltage Vin
Become in light-emitting element circuit 21, the quantity of powered light-emitting component.
Please continue to refer to Fig. 2A, light emitting element driving circuit 100 include switch module 110, current source circuit 120 and
Total harmonic distortion (total harmonic distortion, THD) compensation circuit 130.Wherein, switch module 110 is included for example
But it is not limited to on-off circuit 11 and ON-OFF control circuit 12 as shown in Figure 1A.Wherein, on-off circuit 11 includes multiple switch (example
Such as it is divided into S1, S2, S3 and tetra- switches of S4, as shown in Figure 1A), it is electrically connected respectively with corresponding LED groups G1, G2, G3, with G4
Connect, according to rectified input voltage Vin, to determine in multiple LED, powered LED, be sent out with turning on these corresponding LED
Light.For example, it is identical with prior art LED drive circuit 10, when rectified input voltage Vin level is less than level L1,
Switch S1-S4 is all not turned on, and LED groups G1-G4 is neither luminous；When rectified input voltage Vin level is between level L1 and L2
Between, switch S1 conductings, switch S2-S4 is not turned on, and LED groups G1 lights；When rectified input voltage Vin level is between level
Between L2 and L3, switch S2 conductings, switch S1, S3-S4 are not turned on, and LED groups G1-G2 lights；When rectified input voltage Vin's
Level switch S3 conductings, switchs S1-S2, is not turned on S4, LED groups G1-G3 lights between level L3 and L4；When whole
The level of stream input voltage vin exceedes level L4, switch S4 conductings, and switch S1-S3 is not turned on, and LED groups G1-G4 lights.
Unlike prior art LED drive circuit 10, in the present embodiment, current source circuit 120 except with switch
Outside module 110 couples, separately coupled with THD compensation circuits 130, with according to adjustment electric current Id, there is provided light-emitting component electric current ILED
Give the light-emitting component of conducting.THD compensation circuits 130 couple with current source circuit 120, to according to rectified input voltage Vin, production
Raw adjustment electric current Id, wherein, adjustment electric current Id signal waveforms are anticipated as shown in Figure 2 B, are lost to reduce total harmonic wave of output signal
Very.
In a kind of preferred embodiment, adjustment electric current Id and rectified input voltage Vin has substantially identical phase angle.
Consequently, it is possible to light-emitting component electric current ILED is when rectified input voltage Vin exceedes default level, with rectified input voltage Vin also
With identical phase angle, therefore THD can be reduced.That is, it is characteristic of the invention that：Light-emitting component electric current ILED non-is fixed value,
And at least part time has a substantially identical phase angle with rectified input voltage Vin in a cycle.It should be noted that
It is so-called to be not offered as necessary infallible poorly just with identical phase angle with substantially identical phase angle, and should be regarded as
The tolerable deviation having a little, if compared to fixed value light-emitting component electric current (such as the prior art current I1 in Fig. 2 B
Signal waveform is illustrated), using the present invention, rectified input voltage Vin is comparatively had what is be closer to adjusting electric current Id
Phase angle (therefore light-emitting component electric current ILED at least part times in a cycle have relatively with rectified input voltage Vin
For the phase angle that is closer to), and THD can be reduced.In addition, so-called rectified input voltage Vin exceedes default level, with the
For one embodiment, default level refers to level L1；That is, light-emitting component electric current ILED starts the rectification for non-zero current
The level of input voltage vin, as the signal waveform in Fig. 2 B is illustrated.
Fig. 3 shows second embodiment of the invention, and citing shows the first embodiment of THD compensation circuits 130.At this
In embodiment, THD compensation circuits 130 include voltage-current converter circuit 131, to receive rectified input voltage Vin, and will be whole
Stream input voltage vin is converted to THD compensation electric currents ITHD.In this embodiment, it is such as, but not limited to direct to compensate electric current ITHD by THD
As adjustment electric current Id.
The 3rd embodiment of Fig. 4 display present invention, citing show second of embodiment of THD compensation circuits 130.With
Unlike second embodiment, THD compensation circuits 130 further include setting electricity in addition to including voltage-current converter circuit 131
Flow generation circuit 132 and adder and substracter circuit 133.Wherein, setting electric current generation circuit 132 is to (will be in rear according to reference signal
It is described in detail), produce setting electric current Is.Adder and substracter circuit 133 respectively with voltage-current converter circuit 131 and setting electric current generation circuit
132 couplings, to compensate electric current ITHD and setting electric current Is according to THD, produce adjustment electric current Id.
How current source circuit 120 according to adjustment electric current Id provides light-emitting component electric current ILED, there is various ways, this hair
It is bright to be not limited to any of which.For example, referring to Figure 11 A-11B, current source circuit 120 can be an electric current
Duplicate circuit (current replication circuit has various forms, and the invention is not limited in any of which), and light-emitting component electric current
ILED is for example equal to or is proportional to adjustment electric current Id (when switching any switch conduction in S1-S4, similarly hereinafter), is answered depending on the electric current
Depending on the duplication ratio of circuit processed.Figure 11 C show the another embodiment of current source circuit 120, adjust in the present embodiment
The resistance value that electric current Id is multiplied by resistance Ra is equal to light-emitting component electric current ILED and is multiplied by resistance Rb resistance value, thus according to resistance Ra and
Rb setting, light-emitting component electric current ILED can equally be equal to or be proportional to adjustment electric current Id.Figure 11 D-11E show light-emitting component
Electric current ILED can also be that adjustment electric current Id is subtracted or plus a fixed current.Figure 11 D show the former, in current source circuit 120
A fixed current source 120a is such as, but not limited to included, and light-emitting component electric current ILED subtracts the fixed current for adjustment electric current Id
The fixed current that source 120a is determined；Figure 11 E show the latter, and fixed current source 120a is included in current source circuit 120, and light
The fixed current that element current ILED is determined for adjustment electric current Id plus fixed current source 120a.
Figure 11 above A-11E embodiment is not limited to be used alone, can also two or more combination applications.
The 4th embodiment of Fig. 5 A and 5B display present invention.The present embodiment shows in the second embodiment, switching molding
130 a kind of more specific embodiment of block 110, current source circuit 120 and THD compensation circuits.As shown in Figure 5A, switch module
110 have on-off circuit 111 and ON-OFF control circuit 112, such as, but not limited to respectively with prior art on-off circuit 11 and opening
It is identical to close control circuit 12.Current source circuit 120 is according to adjustment electric current Id, there is provided light-emitting component electric current ILED gives the luminous of conducting
Element.THD compensation circuits 130 include voltage-current converter circuit 131, to receive rectified input voltage Vin, and rectification is defeated
Enter voltage Vin and be converted to THD compensation electric currents ITHD；And compensation electric current ITHD is as adjustment electric current Id.Wherein, Voltage to current transducer
Circuit 131 includes input voltage sense circuit 1311 and current replication circuit 131a；In one embodiment, current replication circuit 131a
Including current mirroring circuit 1312 and current mirroring circuit 1313.Input voltage sense circuit 1311 is receiving rectified input voltage
Vin, there is provided input voltage sample signal.In one embodiment, input voltage sense circuit 1311 is impedance circuit, such as but unlimited
In for resistance R1 as depicted, rectified input voltage Vin is received, produces sampling current as input voltage sample signal.Electricity
Flow duplicate circuit 131a and THD compensation electric current ITHD are produced as adjustment electric current Id, wherein THD compensation electric current according to sampling current
ITHD can be equal to or be proportional to sampling current.In current replication circuit 131a, current mirroring circuit 1313 is coupled to current mirror electricity
Between road 1312 and input voltage sense circuit 1311 (resistance R1), to be sampled according to sampling current, that is, input voltage
Signal, produce switching current；Current mirroring circuit 1312 is coupled between current mirroring circuit 1313 and current source circuit 120, to
According to switching current, THD compensation electric current ITHD are produced as adjustment electric current Id.It should be noted that the above uses two current mirrors
The embodiment of circuit is only citing, if being changed to the current mirroring circuit of less or more number, is certainly possible.
In detail, Fig. 5 A are referred to, as shown in Figure 5A, the CTR current transfer ratio example of current mirroring circuit 1312 and 1313, such as
But it is not limited to respectively 1:N1 and 1:N2；Resistance R1 resistance value is R1；In current mirroring circuit 1313, the crystal of sampling current side
Pipe cross-pressure is Vt；Then adjustment electric current Id is：
Because adjustment electric current Id is relevant to input voltage vin (transistor cross-pressure can be neglected for Vt), therefore with benefit
Repay rectified input voltage Vin THD characteristic.Current source circuit 120 produces light-emitting component electric current ILED according to adjustment electric current Id,
Can reduces the THD of output signal.In figure 5b, show with 1:1 ratio directly replicates adjustment electric current Id as luminous member
Part electric current ILED embodiment；Certainly, previously refering to as described in Figure 11 A-11E, light-emitting component electric current ILED can be adjustment
Electric current Id one fixed current of any ratio and/or plus-minus.
The 5th embodiment of Fig. 6 A and 6B display present invention.The present embodiment shown in second embodiment, voltage x current
131 another more specific embodiment of change-over circuit.As shown in Figure 6A, voltage-current converter circuit 131 includes input voltage sense
Slowdown monitoring circuit 1311, current mirroring circuit 1312 and amplifying circuit 1314.Wherein, input voltage sense circuit 1311 includes impedance electricity
Road, to receive rectified input voltage Vin, sampling current is produced as input voltage sample signal.Input voltage sense circuit
1311 receiving rectified input voltage Vin, there is provided input voltage sample signal.Impedance circuit is such as, but not limited to as schemed institute
The resistance R1 shown, rectified input voltage Vin is received, produce sampling current as input voltage sample signal.Amplifying circuit 1314
It is coupled between current mirroring circuit 1312 and input voltage sense circuit 1311 (resistance R1), including error amplifier A1 and crystal
Pipe Q1, Q2, to receive sampling current, and according to reference signal V1, produce switching current.According to the feedback of amplifying circuit 1314
Balanced design, when circuit balancing, error amplifier A1 two input terminal voltages can be equal.Current mirroring circuit 1312, which is coupled to, to be put
Greatly between circuit 1314 and current source circuit 120, according to switching current, to produce THD compensation electric current ITHD as adjustment electricity
Flow Id.
Please continue to refer to Fig. 6 A, the CTR current transfer ratio example of current mirroring circuit 1312 and amplifying circuit 1314, for example (,) it is but unlimited
In respectively 1:N1 and 1:N2；If the input of amplifying circuit 1,314 1 receives reference signal V1；Then adjustment electric current Id is：
Because adjustment electric current Id is relevant to input voltage vin, therefore the spy of the THD with compensation rectified input voltage Vin
Property.Current source circuit 120 produces light-emitting component electric current ILED according to adjustment electric current Id, it is possible to reduces the THD of output signal.
In Fig. 6 B, show with 1:1 ratio directly replicates embodiments of the adjustment electric current Id as light-emitting component electric current ILED；Certainly,
Previously refering to as described in Figure 11 A-11E, light-emitting component electric current ILED can be adjustment electric current Id any ratio and/or plus-minus
One fixed current.
The 6th embodiment of Fig. 7 A and 7B display present invention.The present embodiment shown in the 3rd embodiment, voltage x current
Change-over circuit 131, setting electric current generation circuit 132 and the more specific embodiment of adder and substracter circuit 133.As shown in figure 7A, electricity
Current voltage change-over circuit 131 is such as, but not limited to identical including defeated with the voltage-current converter circuit 131 in the 5th embodiment
Enter voltage sensing circuit 1311, current mirroring circuit 1312 and amplifying circuit 1314.Setting electric current generation circuit 132 is providing
Setting electric current Is gives adder and substracter circuit 133.Adder and substracter circuit 133 produces with voltage-current converter circuit 131 and setting electric current respectively
Raw circuit 132 couples, and to compensate electric current ITHD and setting electric current Is according to THD, produces adjustment electric current Id；Current source circuit
120 according to adjustment electric current Id, there is provided light-emitting component electric current ILED.Wherein, adder and substracter circuit 133 is such as, but not limited to as schemed
Shown node, with reference to THD compensation electric current ITHD and setting electric current Is, to produce THD compensation electric current ITHD and setting electric current Is
Summation, that is, adjust electric current Id.As illustrated, setting electric current generation circuit 132 such as, but not limited to includes current mirroring circuit
1321 with amplifying circuit 1322.Current mirroring circuit 1321 couples with adder and substracter circuit 133, according to reference current Ir, to produce
Setting electric current Is.Amplifying circuit 1322 includes error amplifier A2, transistor Q3 and impedance circuit 1323；Impedance circuit 1323
Such as, but not limited to resistance R2.Amplifying circuit 1322 couples with current mirroring circuit 1321, according to reference signal V2, to produce
Reference current Ir.According to the feedback balanced design of amplifying circuit 1322, when circuit balancing, error amplifier A2 two inputs
Voltage can be equal.
For example, Fig. 7 A and Fig. 7 B are referred to, as shown in Figure 7 A, the CTR current transfer ratio example of current mirroring circuit 1321, example
As but be not limited to M:1；Resistance R2 resistance value is R2；And it is with the voltage-current converter circuit 131 in the 5th embodiment
Example, then light-emitting component electric current ILED is：
Signal waveform therein is anticipated as shown in Figure 7 B.In the present embodiment, THD compensation electric current ITHD and setting electric current Is is phase
Add, but the invention is not restricted to this；Also can change makes adjustment electric current Id be the difference that THD compensates electric current ITHD and setting electric current Is, also
I.e. adder and substracter circuit 133 can be add circuit or subtraction circuit.In addition, in figure 7b, display light-emitting component electric current ILED can be with
A fixed current is added for adjustment electric current Id.
The 7th embodiment of Fig. 8 A and 8B display present invention.The present embodiment shown in the 3rd embodiment, voltage x current
Change-over circuit 131, setting electric current generation circuit 132 and the more specific embodiment of adder and substracter circuit 133.As shown in Figure 8 A, voltage
Current converter circuit 131 is such as, but not limited to identical with the voltage-current converter circuit 131 in the 4th embodiment, including input
Voltage sensing circuit 1311, current mirroring circuit 1312 and current mirroring circuit 1313.Setting electric current generation circuit 132 is for example but not
It is limited to identical with the setting electric current generation circuit 132 shown in Fig. 7 A, adder and substracter circuit 133 is given to provide setting electric current Is.Add
Subtraction circuit 133 couples with voltage-current converter circuit 131 and setting electric current generation circuit 132 respectively, to be compensated according to THD
Electric current ITHD and setting electric current Is, produce adjustment electric current Id；Current source circuit 120 is then according to adjustment electric current Id, there is provided luminous member
Part electric current ILED.Wherein, adder and substracter circuit 133 be such as, but not limited to node as depicted, with reference to THD compensation electric current ITHD with
Setting electric current Is, to produce compensation electric current ITHD and setting electric current Is summation, that is, adjust electric current Id.
For example, Fig. 8 A and Fig. 8 B are referred to, as shown in Figure 8 A, the CTR current transfer ratio example of current mirroring circuit 1321, example
As but be not limited to M:1；Resistance R2 resistance value is R2；And it is with the voltage-current converter circuit 131 in the 4th embodiment
Example, then light-emitting component electric current ILED is：
Signal waveform therein is anticipated as shown in Figure 8 B.In the present embodiment, THD compensation electric current ITHD and setting electric current Is is phase
Add, but the invention is not restricted to this；Also can change makes adjustment electric current Id be the difference that THD compensates electric current ITHD and setting electric current Is, also
I.e. adder and substracter circuit 133 can be add circuit or subtraction circuit.In addition, in the fig. 8b, display light-emitting component electric current ILED can be with
A fixed current is added for adjustment electric current Id.
Fig. 9 A and 9B shows the 8th embodiment of the present invention, and the present embodiment is shown in the 3rd embodiment, voltage x current
Change-over circuit 131, setting electric current generation circuit 132 and 133 another more specific embodiment of adder and substracter circuit.Such as Fig. 9 A institutes
Show, voltage-current converter circuit 131 includes input voltage sense circuit 1311, current mirroring circuit 1312 and amplifying circuit 1315.
Setting electric current generation circuit 132 is such as, but not limited to identical with the setting electric current generation circuit 132 shown in Fig. 7 A, is set to provide
Determine electric current Is and give adder and substracter circuit 133.Adder and substracter circuit 133 produces with voltage-current converter circuit 131 and setting electric current respectively
Circuit 132 couples, and to compensate electric current ITHD and setting electric current Is according to THD, produces adjustment electric current Id；So that current source circuit
120 according to adjustment electric current Id, there is provided light-emitting component electric current ILED.Wherein, adder and substracter circuit 133 is such as, but not limited to as shown in the figure
Node, with reference to THD compensation electric current ITHD and setting electric current Is, to produce the total of THD compensation electric current ITHD and setting electric current Is
With i.e. adjustment electric current Id.As illustrated, voltage-current converter circuit 131 includes input voltage sense circuit 1311, current mirror electricity
Road 1312 and amplifying circuit 1315.Wherein, input voltage sense circuit 1311 includes bleeder circuit, such as the electricity with series winding
R3 and R4 is hindered, to receive rectified input voltage Vin, K times of partial pressure for producing rectified input voltage Vin samples as input voltage
Signal, wherein
Amplifying circuit 1315 is coupled between current mirroring circuit 1312 and input voltage sense circuit 1311 (bleeder circuit),
Including error amplifier A3, transistor Q4 and resistance R5, to the K times of partial pressure according to rectified input voltage Vin, conversion is produced
Electric current.According to the feedback balanced design of amplifying circuit 1315, when circuit balancing, error amplifier A3 two input terminal voltage meetings
It is equal.Current mirroring circuit 1312 is coupled between amplifying circuit 1315 and adder and substracter circuit 133, according to switching current, to carry
For THD compensation electric currents ITHD.
In detail, Fig. 9 A are referred to, as shown in Figure 9 A, the CTR current transfer ratio example of current mirroring circuit 1312, for example, it is but unlimited
In for 1:N1；In amplifying circuit 1315, resistance R5 connects with transistor Q4；Then adjustment electric current Id is：
Signal waveform therein is anticipated as shown in Figure 9 B.In the present embodiment, THD compensation electric current ITHD and setting electric current Is is phase
Add, but the invention is not restricted to this；Also can change makes adjustment electric current Id be the difference that THD compensates electric current ITHD and setting electric current Is, also
I.e. adder and substracter circuit 133 can be add circuit or subtraction circuit.In addition, in figures 9 b and 9, display light-emitting component electric current ILED can be with
A fixed current is added for adjustment electric current Id.
The 9th embodiment of Figure 10 A-10C display present invention.The present embodiment shown in the 3rd embodiment, voltage x current
Change-over circuit 131, setting electric current generation circuit 132 and 133 another more specific embodiment of adder and substracter circuit.Such as Figure 10 A institutes
Show, setting electric current generation circuit 132 is such as, but not limited to identical with the 6th embodiment with adder and substracter circuit 133.And voltage is electric
Stream change-over circuit 131 includes input voltage sense circuit 1311, (the present embodiment includes current mirror electricity to current replication circuit 131b
Road 1312 and current mirroring circuit 1316) and amplifying circuit 1317.Wherein, input voltage sense circuit 1311 includes bleeder circuit,
Such as resistance R3 and R4 with series winding, to receive rectified input voltage Vin, produce rectified input voltage Vin K times of partial pressure
As input voltage sample signal, wherein
Amplifying circuit 1317 be coupled to input voltage sense circuit 1311 (bleeder circuit) and current replication circuit 131b it
Between, including error amplifier A4 and A5, transistor Q5 and Q6 and resistance R6.Amplifying circuit 1317 according to rectification inputting
Voltage Vin K times of partial pressure, and reference signal V3, produce the first switching current.Set according to the feedback of amplifying circuit 1317 balance
Meter, when circuit balancing, error amplifier A4 two input terminal voltages can be equal, and error amplifier A5 two input terminal voltages
Can be equal.Therefore, the cross-pressure on resistance R6 can be equal to the difference of K times of partial pressure of V3 and input voltage vin, and first switching current etc.
In the resistance value of the cross-pressure on resistance R6 divided by resistance R6.Current mirroring circuit 1316 is coupled to amplifying circuit 1317 and current mirror electricity
Between road 1312, to according to the first switching current, there is provided the second switching current.Current mirroring circuit 1312 and adder and substracter circuit
133 couplings, to according to the second switching current, there is provided THD compensation electric currents ITHD.
In detail, Figure 10 A are referred to, as shown in Figure 10 A, the CTR current transfer ratio example of current mirroring circuit 1316, such as but not
It is limited to respectively 1:N1；The CTR current transfer ratio example of current mirroring circuit 1312, such as, but not limited to respectively 1:N2；Amplifying circuit
In 1317, resistance R6 resistance value is R6；Then adjustment electric current Id is：
Signal waveform therein is anticipated as shown in Figure 10 B.The present embodiment especially shows that adjustment electric current Id is that THD compensates electric current
The embodiment of ITHD and setting electric current Is difference, and THD compensation electric currents ITHD has and the substantially same phases of rectified input voltage Vin
But the waveform of amplitude reverse (or saying opposite sign)；In previous embodiment, THD compensation electric currents ITHD has defeated with rectification
Enter voltage Vin essence with phase and the waveform of amplitude (or saying that sign is identical) in the same direction.In the present embodiment, adder and substracter circuit 133 can
It is considered as subtraction circuit.In addition, when K × Vin is higher than V3, there will not be electric current on resistance R6, now the first switching current is zero,
Therefore depending on V3 and K design, waveform as illustrated in figure 10 c can also be produced.
Illustrate the present invention for preferred embodiment above, it is simply described above, only make those skilled in the art easy
In understanding present disclosure, not it is used for limiting the interest field of the present invention.Under the same spirit of the present invention, this area skill
Art personnel can think and various equivalence changes.For example, icon is directly connected in each embodiment two circuits or interelement, can be planted
The other circuits or element of major function are not influenceed；And for example, light-emitting component is not limited to the light emitting diode shown in each embodiment
(LED), also can be the illuminating circuit of other forms；In another example the number of the current mirroring circuit shown in embodiment, can optionally come
Modification；For another example the PMOS shown in embodiment can change, can be changed for NMOS elements, NMOS be PMOS elements, it is only necessary to corresponding to repair
Change processing mode of the circuit to signal；In another example it is all equal number that light-emitting device array, which is not limited to definitely neat each column,
It is all equal number of arrangement with every row, the number of which part column or row, or part light-emitting component can also be allowed
Arrangement mode not according to the arrangement of row and row, and a LED group being formed with two LED of diagram can be also changed to other numbers
Measure LED and form a LED group.All this kind, can all analogize and obtain according to teachings of the present invention, therefore, the scope of the present invention
All equivalence changes of above and other should be covered.
Claims (12)
1. a kind of light emitting element driving circuit, to drive a light-emitting element circuit, wherein the light-emitting element circuit has multiple
The light-emitting component of series connection, to receive a rectified input voltage, it is characterised in that the light emitting element driving circuit includes：
One switch module, including multiple switch, coupled respectively with the corresponding light-emitting component, to input electricity according to the rectification
Pressure, determine to turn on the quantity of the light-emitting component；
One current source circuit, coupled with the switch module, to according to an adjustment electric current, there is provided a light-emitting component electric current gives conducting
Light-emitting component, it is fixed value that wherein the light-emitting component electric current is non-, and at least part time and the rectification input in a cycle
Voltage has a substantially identical phase angle；And
One total harmonic distortion compensation circuit, coupled with the current source circuit, according to the rectified input voltage, to produce the adjustment
Electric current；
Wherein the total harmonic distortion compensation circuit includes：
One voltage-current converter circuit, the rectified input voltage is converted into total harmonic distortion compensation electric current；
One setting electric current generation circuit, according to a reference signal, to produce a setting electric current；And
One adder and substracter circuit, coupled respectively with the voltage-current converter circuit and the setting electric current generation circuit, should to basis
Total harmonic distortion compensates electric current and the setting electric current, produces the adjustment electric current.
2. light emitting element driving circuit as claimed in claim 1, wherein, the voltage-current converter circuit includes：
One input voltage sense circuit, to receive the rectified input voltage, produce an input voltage sample signal；And
One current mirror duplicate circuit, coupled with the input voltage sense circuit, according to the input voltage sample signal, to produce
The total harmonic distortion compensates electric current.
3. light emitting element driving circuit as claimed in claim 1, wherein, the voltage-current converter circuit includes：
One input voltage sense circuit, to receive the rectified input voltage, produce an input voltage sample signal；
One amplifying circuit, coupled with the input voltage sense circuit, to be interrogated according to the input voltage sample signal and a reference
Number, produce a switching current；And
One current mirroring circuit, coupled with the amplifying circuit, according to the switching current, to produce total harmonic distortion compensation electricity
Stream.
4. light emitting element driving circuit as claimed in claim 1, wherein, the voltage-current converter circuit includes：
One input voltage sense circuit, including a bleeder circuit, the partial pressure to capture the rectified input voltage are used as an input
Voltage sampling signal；
One amplifying circuit, coupled with the input voltage sense circuit, according to the input voltage sample signal, to produce a conversion
Electric current；And
One current mirroring circuit, coupled with the amplifying circuit, according to the switching current, to produce total harmonic distortion compensation electricity
Stream.
5. light emitting element driving circuit as claimed in claim 1, wherein, the setting electric current generation circuit includes：
One amplifying circuit, according to the reference signal, to produce a reference current；And
One current mirroring circuit, coupled with the amplifying circuit, according to the reference current, to produce the setting electric current.
6. a kind of driving method of light-emitting element circuit, the wherein light-emitting element circuit have the light-emitting component of multiple series connection, its
It is characterised by, the driving method of the light-emitting element circuit includes：
One rectified input voltage is provided；
According to the rectified input voltage, the quantity of powered light-emitting component is determined；
According to the rectified input voltage, an adjustment electric current is produced, wherein, the adjustment electric current has essence with the rectified input voltage
The phase angle of identical one；And
According to the adjustment electric current, there is provided a light-emitting component electric current gives powered light-emitting component, and wherein the light-emitting component electric current is non-
For fixed value, and in a cycle at least part time there is a substantially identical phase angle with the rectified input voltage,
Wherein, this is according to the rectified input voltage, there is provided includes the step of the adjustment electric current：
The rectified input voltage is converted into total harmonic distortion compensation electric current；
According to a reference signal, a setting electric current is produced；And
Electric current and the setting electric current are compensated according to the total harmonic distortion, produce the adjustment electric current.
7. the driving method of light-emitting element circuit as claimed in claim 6, wherein, this compensates electric current according to the total harmonic distortion
With the setting electric current, the step of producing the adjustment electric current, includes：Total harmonic distortion compensation electric current is added with the setting electric current
Or subtract computing, to produce the adjustment electric current.
8. the driving method of light-emitting element circuit as claimed in claim 6, wherein, total harmonic distortion compensation electric current have with
Rectified input voltage matter is the same as mutually and amplitude waveform in the same direction.
9. the driving method of light-emitting element circuit as claimed in claim 6, wherein, total harmonic distortion compensation electric current have with
Rectified input voltage Vin essence is the same as mutually but the reverse waveform of amplitude.
10. a kind of light emitting element driving circuit, to drive a light-emitting element circuit, wherein the light-emitting element circuit has multiple
The light-emitting component of series connection, to receive a rectified input voltage, it is characterised in that the light emitting element driving circuit includes：
One switch module, including multiple switch, coupled respectively with the corresponding light-emitting component, to input electricity according to the rectification
Pressure, determine to turn on the quantity of the light-emitting component；
One current source circuit, coupled with the switch module, to according to an adjustment electric current, there is provided a light-emitting component electric current gives conducting
Light-emitting component, it is fixed value that wherein the light-emitting component electric current is non-, and at least part time and the rectification input in a cycle
Voltage has a substantially identical phase angle；And
One total harmonic distortion compensation circuit, coupled with the current source circuit, according to the rectified input voltage, to produce the adjustment
Electric current；
Wherein the total harmonic distortion compensation circuit includes a voltage-current converter circuit, the rectified input voltage to be converted to
One total harmonic distortion compensates electric current；
Wherein the voltage-current converter circuit includes：
One input voltage sense circuit, to receive the rectified input voltage, produce an input voltage sample signal；And
One current mirror duplicate circuit, coupled with the input voltage sense circuit, according to the input voltage sample signal, to produce
The total harmonic distortion compensates electric current.
11. a kind of light emitting element driving circuit, to drive a light-emitting element circuit, wherein the light-emitting element circuit has multiple
The light-emitting component of series connection, to receive a rectified input voltage, it is characterised in that the light emitting element driving circuit includes：
One switch module, including multiple switch, coupled respectively with the corresponding light-emitting component, to input electricity according to the rectification
Pressure, determine to turn on the quantity of the light-emitting component；
One current source circuit, coupled with the switch module, to according to an adjustment electric current, there is provided a light-emitting component electric current gives conducting
Light-emitting component, it is fixed value that wherein the light-emitting component electric current is non-, and at least part time and the rectification input in a cycle
Voltage has a substantially identical phase angle；And
One total harmonic distortion compensation circuit, coupled with the current source circuit, according to the rectified input voltage, to produce the adjustment
Electric current；
Wherein the total harmonic distortion compensation circuit includes a voltage-current converter circuit, the rectified input voltage to be converted to
One total harmonic distortion compensates electric current；
Wherein the voltage-current converter circuit includes：
One input voltage sense circuit, to receive the rectified input voltage, produce an input voltage sample signal；
One amplifying circuit, coupled with the input voltage sense circuit, to be interrogated according to the input voltage sample signal and a reference
Number, produce a switching current；And
One current mirroring circuit, coupled with the amplifying circuit, according to the switching current, to produce total harmonic distortion compensation electricity
Stream.
12. a kind of light emitting element driving circuit, to drive a light-emitting element circuit, wherein the light-emitting element circuit has multiple
The light-emitting component of series connection, to receive a rectified input voltage, it is characterised in that the light emitting element driving circuit includes：
One switch module, including multiple switch, coupled respectively with the corresponding light-emitting component, to input electricity according to the rectification
Pressure, determine to turn on the quantity of the light-emitting component；
One current source circuit, coupled with the switch module, to according to an adjustment electric current, there is provided a light-emitting component electric current gives conducting
Light-emitting component, it is fixed value that wherein the light-emitting component electric current is non-, and at least part time and the rectification input in a cycle
Voltage has a substantially identical phase angle；And
One total harmonic distortion compensation circuit, coupled with the current source circuit, according to the rectified input voltage, to produce the adjustment
Electric current；
Wherein the total harmonic distortion compensation circuit includes a voltage-current converter circuit, the rectified input voltage to be converted to
One total harmonic distortion compensates electric current；
Wherein the voltage-current converter circuit includes：
One input voltage sense circuit, including a bleeder circuit, the partial pressure to capture the rectified input voltage are used as an input
Voltage sampling signal；
One amplifying circuit, coupled with the input voltage sense circuit, according to the input voltage sample signal, to produce a conversion
Electric current；And
One current mirroring circuit, coupled with the amplifying circuit, according to the switching current, to produce total harmonic distortion compensation electricity
Stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410275924.2A CN105282900B (en) | 2014-06-19 | 2014-06-19 | The driving method of light emitting element driving circuit and light-emitting element circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410275924.2A CN105282900B (en) | 2014-06-19 | 2014-06-19 | The driving method of light emitting element driving circuit and light-emitting element circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105282900A CN105282900A (en) | 2016-01-27 |
| CN105282900B true CN105282900B (en) | 2017-11-17 |
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| CN201410275924.2A Expired - Fee Related CN105282900B (en) | 2014-06-19 | 2014-06-19 | The driving method of light emitting element driving circuit and light-emitting element circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612204A (en) * | 2010-12-22 | 2012-07-25 | 梁从主 | Light emitting diode driving circuit |
| CN103379706A (en) * | 2012-04-20 | 2013-10-30 | 瑞鼎科技股份有限公司 | Driving circuit |
| TW201352062A (en) * | 2012-06-06 | 2013-12-16 | Vastview Tech Inc | Based on the LED of illumination apparatus sectional drive method and apparatus |
| CN103517489A (en) * | 2012-06-14 | 2014-01-15 | 欧司朗股份有限公司 | Driver used in lighting device, and lighting device having the same |
-
2014
- 2014-06-19 CN CN201410275924.2A patent/CN105282900B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612204A (en) * | 2010-12-22 | 2012-07-25 | 梁从主 | Light emitting diode driving circuit |
| CN103379706A (en) * | 2012-04-20 | 2013-10-30 | 瑞鼎科技股份有限公司 | Driving circuit |
| TW201352062A (en) * | 2012-06-06 | 2013-12-16 | Vastview Tech Inc | Based on the LED of illumination apparatus sectional drive method and apparatus |
| CN103517489A (en) * | 2012-06-14 | 2014-01-15 | 欧司朗股份有限公司 | Driver used in lighting device, and lighting device having the same |
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| Publication number | Publication date |
|---|---|
| CN105282900A (en) | 2016-01-27 |
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