CN103889113A - LED current ripple eliminating circuit and LED lighting device - Google Patents
LED current ripple eliminating circuit and LED lighting device Download PDFInfo
- Publication number
- CN103889113A CN103889113A CN201410075677.1A CN201410075677A CN103889113A CN 103889113 A CN103889113 A CN 103889113A CN 201410075677 A CN201410075677 A CN 201410075677A CN 103889113 A CN103889113 A CN 103889113A
- Authority
- CN
- China
- Prior art keywords
- resistance
- led
- current ripples
- circuit
- nmos pipe
- 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.)
- Granted
Links
Images
Abstract
The invention belongs to the technical field of LED control and provides an LED current ripple eliminating circuit and an LED lighting device. The LED current ripple eliminating circuit comprises a first resistor R1, a first capacitor C1, a second resistor R2 and an NMOS tube M1, the LED current ripple eliminating circuit is simple in structure and low in cost, the NMOS tube M1 works in a saturation region, the first resistor R1, the first capacitor C1 and the second resistor R2 conduct filter processing on a grid voltage ripple of the NMOS tube M1 so that the current ripple of a drain of the NMOS tube M1 can be reduced, the current ripple flowing through an LED load is further effectively reduced, the aim of LED non-stroboscopic lighting is achieved, and the problem that an existing LED current ripper eliminating and driving circuit cannot achieve LED non-stroboscopic lighting by effectively eliminating a current ripple is solved.
Description
Technical field
The invention belongs to LED control technology field, relate in particular to a kind of LED current ripples and eliminate circuit and LED light-emitting device.
Background technology
At present, the LED constant current control program that realizes High Power Factor can be divided into has power frequency flicker (abbreviation stroboscopic) scheme and without power frequency flicker (being called for short without stroboscopic) scheme.
Wherein, for the LED constant current control program that has stroboscopic, its peripheral circuit is simple, and system Material Cost is lower.Show but study, the stroboscopic of LED lamp can cause very large injury to human eye, so, if this type of scheme wants to alleviate stroboscopic, need to increase input capacitance or output filter capacitor.If increase input capacitance, to sacrifice High Power Factor as cost, the effect that stroboscopic alleviates is better often, and power factor can be lower; If increase output filter capacitor, although can alleviate the stroboscopic of LED lamp, can not fundamentally solve stroboscopic problem, and also can increase system Material Cost, also just make this type of scheme lose low-cost advantage.
For the LED constant current control program without stroboscopic, although it is without stroboscopic, but peripheral circuit complexity, system Material Cost is high, and PCB layout is difficulty comparatively, need integrated two cover modulation circuits without the controller of the LED constant-current control circuit of stroboscopic is inner, and then cause the control circuit complexity of controller inside, the cost of controller is higher than the conventional PFC chip that possesses High Power Factor, thereby system Material Cost is increased.
The stroboscopic and the Cost Problems that exist for the LED constant current control program that possesses High Power Factor, prior art has proposed a kind of solution as shown in Figure 1, it adopts a LED current ripples based on triode to eliminate drive circuit 10 ripple in the electric current that possesses the LED constant-current control circuit of High Power Factor and export is carried out to filtering processing to reach the object of eliminating stroboscopic, this method can be reduced to certain scope to alleviate stroboscopic by the ripple of output current, but capacitor C 1 needs to adopt high withstand voltage electric capacity, its cost is high, and this circuit is not good enough for the eradicating efficacy of current ripples, cannot effectively eliminate current ripples to reach the object of LED without stroboscopic.
In sum, existing LED current ripples is eliminated drive circuit cannot effectively to eliminate current ripples high without stroboscopic and cost to realize.
Summary of the invention
The object of the present invention is to provide a kind of LED current ripples to eliminate circuit, be intended to solve existing LED current ripples and eliminate the existing current ripples of cannot effectively eliminating of drive circuit to realize LED without stroboscopic and the high problem of cost.
The present invention realizes like this, a kind of LED current ripples is eliminated circuit, be connected with constant-current control circuit and LED load, the current output terminal of described constant-current control circuit connects the input of described LED load, and the input that described LED current ripples is eliminated circuit is connected respectively the output of described LED load and the loop end of described constant-current control circuit with output;
Described LED current ripples is eliminated circuit and is comprised the first resistance R 1, the first capacitor C 1, the second resistance R 2 and NMOS pipe M1; The common contact of the drain electrode of the first end of described the first resistance R 1 and described NMOS pipe M1 is the input that described LED current ripples is eliminated circuit, the second end of the first end of described the first capacitor C 1 and described the first resistance R 1 and the first end of described the second resistance R 2 are connected to the grid of described NMOS pipe M1 altogether, and it is the output that described LED current ripples is eliminated circuit that the second end of the described NMOS pipe source electrode of M1 and the second end of described the second resistance R 2 and described the first capacitor C 1 connects formed common contact altogether; Described NMOS pipe M1 works in saturation region, by described the first resistance R 1, described the first capacitor C 1 and described the second resistance R 2, the grid voltage ripple of described NMOS pipe M1 is carried out to filtering processing so that described NMOS pipe M1 reduces the current ripples of its drain electrode.
Another object of the present invention is also to provide a kind of LED light-emitting device, and described LED light-emitting device comprises constant-current control circuit, LED load and above-mentioned LED current ripples elimination circuit.
The present invention comprises the first resistance R 1 by employing, the first capacitor C 1, the LED current ripples of the second resistance R 2 and NMOS pipe M1 is eliminated circuit, it is simple in structure and cost is low, NMOS pipe M1 works in saturation region, and by the first resistance R 1, the first capacitor C 1 and the second resistance R 2 are carried out filtering processing so that described NMOS pipe M1 reduces the current ripples of its drain electrode to the grid voltage ripple of NMOS pipe M1, and then effectively reduce to flow through the current ripples of LED load, thereby reach the object of LED without strobe light emission, solve existing LED current ripples and eliminated the existing current ripples of cannot effectively eliminating of drive circuit to realize the problem of LED without stroboscopic.
Accompanying drawing explanation
Fig. 1 is the structure chart that the LED current ripples that provides of prior art is eliminated drive circuit;
Fig. 2 is the structure chart that the LED current ripples that provides of the embodiment of the present invention is eliminated circuit;
Fig. 3 is another structure chart that the LED current ripples that provides of the embodiment of the present invention is eliminated circuit;
Fig. 4 is the structure chart that the LED current ripples that comprise clamper module corresponding with Fig. 2 eliminated circuit;
Fig. 5 is the structure chart that the LED current ripples that comprise clamper module corresponding with Fig. 3 eliminated circuit;
Fig. 6 is another structure chart that the LED current ripples that comprise clamper module corresponding with Fig. 2 eliminated circuit;
Fig. 7 is another structure chart that the LED current ripples that comprise clamper module corresponding with Fig. 3 eliminated circuit.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The LED current ripples that Fig. 2 shows the embodiment of the present invention to be provided is eliminated the structure of circuit, for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows:
The LED current ripples that the embodiment of the present invention provides is eliminated circuit 100 and is connected with constant-current control circuit 200 and LED load 300, the input of current output terminal+connection LED load 300 of constant-current control circuit 200, the input that LED current ripples is eliminated circuit 100 is connected respectively the output of LED load 300 and the loop end of constant-current control circuit 200 with output.Wherein, constant-current control circuit 200 is the LED constant-current control circuits that possess High Power Factor, and LED load 300 is the LED modules that comprise one or more LED.
LED current ripples is eliminated circuit 100 and is comprised the first resistance R 1, the first capacitor C 1, the second resistance R 2 and NMOS pipe M1; The common contact of the drain electrode of the first end of the first resistance R 1 and NMOS pipe M1 is the input that LED current ripples is eliminated circuit 100, the second end of the first end of the first capacitor C 1 and the first resistance R 1 and the first end of the second resistance R 2 are connected to the grid of NMOS pipe M1 altogether, and it is the output that LED current ripples is eliminated circuit 100 that the second end of the NMOS pipe source electrode of M1 and the second end of the second resistance R 2 and the first capacitor C 1 connects formed common contact altogether; NMOS pipe M1 works in saturation region, by the first resistance R 1, the first capacitor C 1 and the second resistance R 2, the grid voltage ripple of NMOS pipe M1 is carried out to filtering processing so that NMOS pipe M1 reduces the current ripples of its drain electrode.
Wherein, NMOS pipe M1 works in saturation region, (is V at the grid-source voltage of NMOS pipe M1
gS) when fixing, its drain current can (be not V with drain electrode-source voltage
dS) change, the grid voltage ripple of NMOS being managed to M1 by the first resistance R 1, the first capacitor C 1 and the second resistance R 2 carries out filtering to reduce voltage ripple, can driving N metal-oxide-semiconductor M1 reduce the current ripples of its drain electrode, and then the current ripples that flows through LED load is reduced, thereby realize the object of LED without strobe light emission.In the above-mentioned process that reduces current ripples, V
dSborn the voltage ripple of the grid of NMOS pipe M1, its power of bearing voltage ripple is consumed by NMOS pipe M1.
In order to make the current ripples eradicating efficacy of LED current ripples elimination circuit 100 better, and reduce as much as possible to flow through the current ripples of LED load 300, LED current ripples is eliminated circuit 100 also can further comprise the 3rd resistance R 3, as shown in Figure 3, the 3rd resistance R 3 is connected between the NMOS pipe source electrode of M1 and the second end of the second resistance R 2.Can produce a negative feedback regulating for electric current by the 3rd resistance R 3, thereby current ripples is reduced to close to zero, greatly promote the current ripples filtration result of LED current ripples elimination circuit 100.
In addition, eliminate circuit 100 for the LED current ripples shown in Fig. 2 and Fig. 3, start to carry out current ripples filtering operation fast in order to make LED current ripples eliminate circuit 100, and reduce the power consumption of NMOS pipe M1, as shown in Fig. 4 (corresponding diagram 2) and Fig. 5 (corresponding diagram 3), LED current ripples is eliminated circuit 100 also can further comprise clamper module 101, and clamper module 101 comprises the 4th resistance R 4, the 5th resistance R 5 and positive-negative-positive triode Q1; The emitter of the first end of the 4th resistance R 4 and positive-negative-positive triode Q1 is connected to the output of LED load 300 altogether, the second end of the 4th resistance R 4 and the first end of the 5th resistance R 5 are connected to the base stage of positive-negative-positive triode Q1 altogether, and the collector electrode of positive-negative-positive triode Q1 and the second end of the 5th resistance R 5 are connected respectively first end and second end of the first capacitor C 1.Wherein, adopt above-mentioned clamper module, can in the time of circuit start, eliminate the object of circuit 100 to reach quick startup LED current ripples to the first capacitor C 1 quick charge by positive-negative-positive triode Q1, and can realize voltage clamping control so that the drain voltage of NMOS pipe M1 is limited, thereby the object that reaches the power consumption that reduces NMOS pipe M1, the resistance of adjusting the 4th resistance R 4 and the 5th resistance R 5 can regulate the size of clamp voltage.
In other embodiments of the invention, as shown in Fig. 6 (corresponding diagram 2) and Fig. 7 (corresponding diagram 3), clamper module 101 can also comprise the 6th resistance R 6, the 7th resistance R 7, PMOS pipe M2 and diode D1; The source electrode of the first end of the 6th resistance R 6 and PMOS pipe M2 is connected to the output of LED load 300 altogether, the second end of the 6th resistance R 6 and the first end of the 7th resistance R 7 are connected to the grid of PMOS pipe M2 altogether, the drain electrode of PMOS pipe M2 connects the anode of diode D1, and the negative electrode of diode D1 and the second end of the 7th resistance R 7 are connected respectively first end and second end of the first capacitor C 1.Wherein, the combination of PMOS pipe M2 and diode D1 is identical with the function of above-mentioned positive-negative-positive triode Q1, therefore repeats no more.
Eliminate circuit 100 for the LED current ripples shown in Fig. 2 to Fig. 7, both can adopt above-mentioned each discrete component to build in practical application, also can adopt CMOS technique that all components and parts except the first capacitor C 1 are integrated in a chip, be combined into and possess the LED Constant Current Control System that drives function without stroboscopic with form and the LED constant-current control circuit with High Power Factor of integrated circuit.
LED current ripples based on above-mentioned is eliminated circuit 100, and the embodiment of the present invention also provides a kind of LED light-emitting device, and it comprises constant-current control circuit 200, LED load 300 and above-mentioned LED current ripples elimination circuit 100.
The embodiment of the present invention comprises the first resistance R 1 by employing, the first capacitor C 1, the LED current ripples of the second resistance R 2 and NMOS pipe M1 is eliminated circuit 100, it is simple in structure and cost is low, NMOS pipe M1 works in saturation region, and by the first resistance R 1, the first capacitor C 1 and the second resistance R 2 are carried out filtering processing so that described NMOS pipe M1 reduces the current ripples of its drain electrode to the grid voltage ripple of NMOS pipe M1, and then effectively reduce to flow through the current ripples of LED load 300, thereby reach the object of LED without strobe light emission, solve existing LED current ripples and eliminated the existing current ripples of cannot effectively eliminating of drive circuit to realize the problem of LED without stroboscopic.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a LED current ripples is eliminated circuit, it is characterized in that, described LED current ripples is eliminated circuit and is connected with constant-current control circuit and LED load, the current output terminal of described constant-current control circuit connects the input of described LED load, and the input that described LED current ripples is eliminated circuit is connected respectively the output of described LED load and the loop end of described constant-current control circuit with output;
Described LED current ripples is eliminated circuit and is comprised the first resistance R 1, the first capacitor C 1, the second resistance R 2 and NMOS pipe M1; The common contact of the drain electrode of the first end of described the first resistance R 1 and described NMOS pipe M1 is the input that described LED current ripples is eliminated circuit, the second end of the first end of described the first capacitor C 1 and described the first resistance R 1 and the first end of described the second resistance R 2 are connected to the grid of described NMOS pipe M1 altogether, and it is the output that described LED current ripples is eliminated circuit that the second end of the described NMOS pipe source electrode of M1 and the second end of described the second resistance R 2 and described the first capacitor C 1 connects formed common contact altogether; Described NMOS pipe M1 works in saturation region, by described the first resistance R 1, described the first capacitor C 1 and described the second resistance R 2, the grid voltage ripple of described NMOS pipe M1 is carried out to filtering processing so that described NMOS pipe M1 reduces the current ripples of its drain electrode.
2. LED current ripples as claimed in claim 1 is eliminated circuit, it is characterized in that, described LED current ripples is eliminated circuit and also comprised the 3rd resistance R 3, and described the 3rd resistance R 3 is connected between the described NMOS pipe source electrode of M1 and the second end of described the second resistance R 2.
3. LED current ripples as claimed in claim 1 or 2 is eliminated circuit, it is characterized in that, described LED current ripples is eliminated circuit and also comprised clamper module,
Described clamper module comprises the 4th resistance R 4, the 5th resistance R 5 and positive-negative-positive triode Q1; The emitter of the first end of described the 4th resistance R 4 and described positive-negative-positive triode Q1 is connected to the output of described LED load altogether, the second end of described the 4th resistance R 4 and the first end of described the 5th resistance R 5 are connected to the base stage of described positive-negative-positive triode Q1 altogether, and the collector electrode of described positive-negative-positive triode Q1 and the second end of described the 5th resistance R 5 are connected respectively first end and second end of described the first capacitor C 1.
4. LED current ripples as claimed in claim 1 or 2 is eliminated circuit, it is characterized in that, described LED current ripples is eliminated circuit and also comprised clamper module, and described clamper module comprises the 6th resistance R 6, the 7th resistance R 7, PMOS pipe M2 and diode D1;
The source electrode of the first end of described the 6th resistance R 6 and described PMOS pipe M2 is connected to the output of described LED load altogether, the second end of described the 6th resistance R 6 and the first end of described the 7th resistance R 7 are connected to the grid of described PMOS pipe M2 altogether, the drain electrode of described PMOS pipe M2 connects the anode of described diode D1, and the negative electrode of described diode D1 and the second end of described the 7th resistance R 7 are connected respectively first end and second end of described the first capacitor C 1.
5. a LED light-emitting device, comprise constant-current control circuit and LED load, it is characterized in that, described LED light-emitting device also comprises LED current ripples elimination circuit, described LED current ripples is eliminated circuit and is connected with described constant-current control circuit and described LED load, the current output terminal of described constant-current control circuit connects the input of described LED load, and the input that described LED current ripples is eliminated circuit is connected respectively the output of described LED load and the loop end of described constant-current control circuit with output;
Described LED current ripples is eliminated circuit and is comprised the first resistance R 1, the first capacitor C 1, the second resistance R 2 and NMOS pipe M1; The common contact of the drain electrode of the first end of described the first resistance R 1 and described NMOS pipe M1 is the input that described LED current ripples is eliminated circuit, the second end of the first end of described the first capacitor C 1 and described the first resistance R 1 and the first end of described the second resistance R 2 are connected to the grid of described NMOS pipe M1 altogether, and it is the output that described LED current ripples is eliminated circuit that the second end of the described NMOS pipe source electrode of M1 and the second end of described the second resistance R 2 and described the first capacitor C 1 connects formed common contact altogether; Described NMOS pipe M1 works in saturation region, by described the first resistance R 1, described the first capacitor C 1 and described the second resistance R 2, the grid voltage ripple of described NMOS pipe M1 is carried out to filtering processing so that described NMOS pipe M1 reduces the current ripples of its drain electrode.
6. LED light-emitting device as claimed in claim 5, is characterized in that, described LED current ripples is eliminated circuit and also comprised the 3rd resistance R 3, and described the 3rd resistance R 3 is connected between the described NMOS pipe source electrode of M1 and the second end of described the second resistance R 2.
7. the LED light-emitting device as described in claim 5 or 6, is characterized in that, described LED current ripples is eliminated circuit and also comprised clamper module,
Described clamper module comprises the 4th resistance R 4, the 5th resistance R 5 and positive-negative-positive triode Q1; The emitter of the first end of described the 4th resistance R 4 and described positive-negative-positive triode Q1 is connected to the output of described LED load altogether, the second end of described the 4th resistance R 4 and the first end of described the 5th resistance R 5 are connected to the base stage of described positive-negative-positive triode Q1 altogether, and the collector electrode of described positive-negative-positive triode Q1 and the second end of described the 5th resistance R 5 are connected respectively first end and second end of described the first capacitor C 1.
8. the LED light-emitting device as described in claim 5 or 6, is characterized in that, described LED current ripples is eliminated circuit and also comprised clamper module, and described clamper module comprises the 6th resistance R 6, the 7th resistance R 7, PMOS pipe M2 and diode D1;
The source electrode of the first end of described the 6th resistance R 6 and described PMOS pipe M2 is connected to the output of described LED load altogether, the second end of described the 6th resistance R 6 and the first end of described the 7th resistance R 7 are connected to the grid of described PMOS pipe M2 altogether, the drain electrode of described PMOS pipe M2 connects the anode of described diode D1, and the negative electrode of described diode D1 and the second end of described the 7th resistance R 7 are connected respectively first end and second end of described the first capacitor C 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410075677.1A CN103889113B (en) | 2014-03-03 | 2014-03-03 | LED current ripple eliminating circuit and LED lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410075677.1A CN103889113B (en) | 2014-03-03 | 2014-03-03 | LED current ripple eliminating circuit and LED lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103889113A true CN103889113A (en) | 2014-06-25 |
| CN103889113B CN103889113B (en) | 2017-01-25 |
Family
ID=50957776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410075677.1A Active CN103889113B (en) | 2014-03-03 | 2014-03-03 | LED current ripple eliminating circuit and LED lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103889113B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104093253A (en) * | 2014-07-16 | 2014-10-08 | 浙江大学 | Non-strobe isolated LED constant-current driving circuit |
| CN105208743A (en) * | 2015-10-23 | 2015-12-30 | 江苏新广联光电股份有限公司 | Super-long service life drive power supply without stroboflash |
| CN106658862A (en) * | 2017-01-17 | 2017-05-10 | 厦门奇力微电子有限公司 | Current ripple removal circuit and method |
| CN108575019A (en) * | 2017-08-25 | 2018-09-25 | 帝奥微电子有限公司 | Current ripples eliminate circuit |
| CN109152144A (en) * | 2018-09-28 | 2019-01-04 | 帝奥微电子有限公司 | LED current ripple suitable for extremely low TRIAC light modulation depth eliminates circuit |
| CN109640460A (en) * | 2019-02-01 | 2019-04-16 | 江西晶磊科技有限公司 | A kind of LED is without frequent flashing control circuit |
| CN109788600A (en) * | 2017-11-14 | 2019-05-21 | 美芯晟科技（北京）有限公司 | A kind of circuit for eliminating current ripples, system and method |
| CN110446300A (en) * | 2019-08-06 | 2019-11-12 | 美芯晟科技（北京）有限公司 | Current ripple removing circuit, related circuit and device |
| CN110838789A (en) * | 2018-08-17 | 2020-02-25 | 美芯晟科技（北京）有限公司 | Ripple suppression circuit, system and method |
| CN114627805A (en) * | 2022-05-12 | 2022-06-14 | 镭昱光电科技(苏州)有限公司 | Drive circuit, drive method of LED unit and display panel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102203690A (en) * | 2008-12-10 | 2011-09-28 | 凌特公司 | Current ripple reduction circuit for leds |
| CN103475235A (en) * | 2013-09-12 | 2013-12-25 | 昆山新金福精密电子有限公司 | Parallel-connection voltage stabilizing circuit |
| CN203748073U (en) * | 2014-03-03 | 2014-07-30 | 深圳市明微电子股份有限公司 | LED current ripple suppression circuit and LED light-emitting device |
-
2014
- 2014-03-03 CN CN201410075677.1A patent/CN103889113B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102203690A (en) * | 2008-12-10 | 2011-09-28 | 凌特公司 | Current ripple reduction circuit for leds |
| CN103475235A (en) * | 2013-09-12 | 2013-12-25 | 昆山新金福精密电子有限公司 | Parallel-connection voltage stabilizing circuit |
| CN203748073U (en) * | 2014-03-03 | 2014-07-30 | 深圳市明微电子股份有限公司 | LED current ripple suppression circuit and LED light-emitting device |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104093253B (en) * | 2014-07-16 | 2016-04-06 | 浙江大学 | A kind of without stroboscopic isolated form constant current driver circuit for LED |
| CN104093253A (en) * | 2014-07-16 | 2014-10-08 | 浙江大学 | Non-strobe isolated LED constant-current driving circuit |
| CN105208743A (en) * | 2015-10-23 | 2015-12-30 | 江苏新广联光电股份有限公司 | Super-long service life drive power supply without stroboflash |
| CN106658862A (en) * | 2017-01-17 | 2017-05-10 | 厦门奇力微电子有限公司 | Current ripple removal circuit and method |
| WO2019037437A1 (en) * | 2017-08-25 | 2019-02-28 | 帝奥微电子有限公司 | Current ripple elimination circuit |
| CN108575019A (en) * | 2017-08-25 | 2018-09-25 | 帝奥微电子有限公司 | Current ripples eliminate circuit |
| CN109788600A (en) * | 2017-11-14 | 2019-05-21 | 美芯晟科技（北京）有限公司 | A kind of circuit for eliminating current ripples, system and method |
| CN110838789A (en) * | 2018-08-17 | 2020-02-25 | 美芯晟科技（北京）有限公司 | Ripple suppression circuit, system and method |
| CN110838789B (en) * | 2018-08-17 | 2021-06-04 | 美芯晟科技（北京）有限公司 | Ripple suppression circuit, system and method |
| CN109152144A (en) * | 2018-09-28 | 2019-01-04 | 帝奥微电子有限公司 | LED current ripple suitable for extremely low TRIAC light modulation depth eliminates circuit |
| CN110933816A (en) * | 2018-09-28 | 2020-03-27 | 帝奥微电子有限公司 | LED current ripple eliminating circuit suitable for extremely-low TRIAC dimming depth |
| CN109152144B (en) * | 2018-09-28 | 2020-07-14 | 帝奥微电子有限公司 | L ED current ripple elimination circuit suitable for extremely low TRIAC dimming depth |
| CN110933816B (en) * | 2018-09-28 | 2022-01-14 | 江苏帝奥微电子股份有限公司 | LED current ripple eliminating circuit suitable for extremely-low TRIAC dimming depth |
| CN109640460A (en) * | 2019-02-01 | 2019-04-16 | 江西晶磊科技有限公司 | A kind of LED is without frequent flashing control circuit |
| CN110446300A (en) * | 2019-08-06 | 2019-11-12 | 美芯晟科技（北京）有限公司 | Current ripple removing circuit, related circuit and device |
| CN110446300B (en) * | 2019-08-06 | 2022-05-13 | 美芯晟科技(北京)股份有限公司 | Current ripple removing circuit, related circuit and device |
| CN114627805A (en) * | 2022-05-12 | 2022-06-14 | 镭昱光电科技(苏州)有限公司 | Drive circuit, drive method of LED unit and display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103889113B (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103889113A (en) | LED current ripple eliminating circuit and LED lighting device | |
| CN203748073U (en) | LED current ripple suppression circuit and LED light-emitting device | |
| CN103166458B (en) | Boosted circuit, backlight driver circuit and backlight module | |
| CN103269550A (en) | LED ((Light Emitting Diode) current ripple elimination driving circuit | |
| CN104917376B (en) | DC/DC converter | |
| US10708993B2 (en) | Driver and LED lamp comprising driver | |
| CN103384436A (en) | Light-emitting diode (LED) backlight constant-current circuit | |
| CN203788531U (en) | Silicon controlled rectifier dimming LED power ripple suppression circuit | |
| CN104507216B (en) | LED drive circuit and use its liquid crystal display device | |
| CN103796387B (en) | A kind of LED drive device, battery charger and driving control circuit thereof | |
| CN102014537B (en) | Drive circuit of LED lamp | |
| CN103533719A (en) | Triode-based light-emitting diode (LED) current ripple elimination driving circuit | |
| CN203840596U (en) | Ripple current suppression circuit and LED circuit | |
| CN108575019B (en) | Current ripple cancellation circuit | |
| CN103024977A (en) | Light emitting diode driving circuit | |
| CN102026435B (en) | Light emitting diode driving circuit | |
| CN205454154U (en) | Light emitting module controlling means | |
| US9089022B2 (en) | Light adjusting device with switching element | |
| CN104717800B (en) | Supply unit and LED lamp devices | |
| CN107295717A (en) | A kind of control circuit for LED lamp | |
| CN104053288B (en) | The non-isolated voltage-dropping type LED drive circuit of adaptation power supply | |
| CN203968437U (en) | A kind of Dimmable LED driving power and corresponding LED light fixture | |
| CN207266338U (en) | The flash lamp driving chip of ultra low dropout constant current source module | |
| CN102843808A (en) | Constant current driver of light emitting diode | |
| CN104302049A (en) | Led power source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |