CN106879120B - Can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of booting and its method - Google Patents
Can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of booting and its method Download PDFInfo
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- CN106879120B CN106879120B CN201710202929.6A CN201710202929A CN106879120B CN 106879120 B CN106879120 B CN 106879120B CN 201710202929 A CN201710202929 A CN 201710202929A CN 106879120 B CN106879120 B CN 106879120B
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- 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]
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- 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]
- H05B45/10—Controlling the intensity of the light
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- 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]
- H05B45/20—Controlling the colour of the light
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Abstract
The invention discloses can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of booting, including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, controllable accurate regulated power supply, the first LED light group, the second LED light group, the first NPN triode, the second NPN triode, the first capacitance and the second capacitance, first LED light group is composed in series with the second LED light group by multiple LED light, and power supply is separately connected first resistor, second resistance, 3rd resistor, the first LED light group and the second LED light group；The present invention is by being arranged capacitance and NPN triode, in the rigid input voltage of circuit, voltage first flow in capacitance and charges, so that the base stage of the NPN triode of control LED light opening and closing is not had control source, so that triode is ended, one group of LED light is made temporarily to be not turned on, after capacitor charging is complete, this group of LED light is opened, then coordinates the effect of controllable accurate regulated power supply, is extinguished after preventing LED from occurring one group of LED flicker in booting and is arrived another group of LED light startup again.
Description
Technical field
The present invention relates to LED technology field, more particularly, to can adjusting brightness of LED lamps and color simultaneously the anti-lightning of booting
Road and its method.
Background technology
Attention with people to the energy, power-saving technology also develop therewith, and wherein LED technology is wherein one important research
One of technology, energy saving widely to be paid close attention to illumination effect, the place of present many indoor and outdoor replaces LED light
Traditional incandescent lamp；And in order to meet the public growing demand to LED light, people make deeper to the function of LED light
Secondary research, although existing LED light can adjust the wink that brightness can not adjust with color, and just started in circuit simultaneously
Between, when power input ceiling voltage, since voltage can be increased to maximum voltage from zero, the LED light of lower operating voltage can flicker
Then extinguish, then start to the LED light compared with high working voltage.
Invention content
In view of the deficiencies of the prior art, it is an object of the invention to a kind of adjustable brightness of LED light simultaneously and color and
There is no the circuit of blinking action and its method in the moment that LED light is opened.
To achieve the above object, scheme provided by the invention is：Can simultaneously adjusting brightness of LED lamps and color the anti-sudden strain of a muscle of booting
Circuit, including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, controllable accurate voltage stabilizing electricity
Source, the first LED light group, the second LED light group, the first NPN triode, the second NPN triode, the first capacitance and the second capacitance, institute
It states the first LED light group to be composed in series by multiple LED light with the second LED light group, the external power being preset with is separately connected described
First resistor, second resistance, 3rd resistor, the first LED light group and the second LED light group, the first resistor are separately connected controllably
The base stage of the cathode of accurate regulated power supply and the second NPN triode, the plus earth of the controllable accurate regulated power supply；Described
Two resistance connect the second capacitance, the reference pole of the second capacitance connection controllable accurate regulated power supply；The 3rd resistor difference
Connect the collector of the second NPN triode, the base stage of the first capacitance, the 6th resistance and the first NPN triode, the 2nd NPN
Emitter the 4th resistance of connection of triode, the 4th resistance eutral grounding, first capacity earth, the 6th resistance connect
Ground；First LED light group connects the collector of the first NPN triode, and the emitter of the first NPN triode is separately connected the 5th
The reference pole of resistance and controllable accurate regulated power supply, second LED light group are separately connected the 5th resistance and controllable accurate voltage stabilizing
The reference pole of power supply, the 5th resistance eutral grounding.
Further, the first resistor, second resistance, 3rd resistor, the resistance value of the 4th resistance and the 6th resistance are big
It is inversely proportional in the resistance value of the 5th resistance, the 4th resistance and the 5th resistance.
Further, the startup voltage for starting voltage and being less than the second LED light group of first LED light group.
Further, first LED light group sends out warm light, and the second LED light group sends out cold light.
The present invention also provides working methods：In the moment of circuit booting, external power input, the voltage of circuit is from zero at this time
It gradually rises to maximum voltage, in this process, voltage flow to first resistor, second resistance, 3rd resistor, the first LED respectively
Lamp group and the second LED light group, and when voltage flows through 3rd resistor, since the short circuit effect that the first capacitance has just been switched on makes from third electricity
The voltage of resistance output flow to the first capacitance and charges to the first capacitance entirely；When the first capacitor charging to its output voltage reaches
When setting value, the conducting of the first NPN triode；When voltage flows through second resistance and flow to the second capacitance simultaneously, the second capacitance is seen at this time
Make short circuit, then voltage is input to the reference pole of controllable accurate regulated power supply through the second capacitance, and controllable accurate regulated power supply is made to end,
It enables the second NPN triode be connected to make the base stage of the second NPN triode obtain voltage, the first NPN transistor base is made to obtain
Current potential VB reduce, so that the voltage VBE for flowing to emitter from the first NPN transistor base is reduced to setting value, enable the first NPN tri-
Pole pipe is ended, and the first LED light group is made not shine；After being set the time, the voltage of power input rises to maximum value, the second LED light
Group shines, and the first LED light group of moment for being now turned on high input voltage in fact does not shine, and only the second LED light group shines；
When input voltage Vo is low-voltage, starts voltage VLED2 since the second LED light group is not up to it, make the 2nd LED
Lamp group does not shine, and the first LED light group shines, and is the process that minimum voltage rises to voltage VLED2, the first LED light in input voltage
Group gradually brightens, and the second LED light group does not shine；
When input voltage increases to the startup voltage VLED2 of the second LED light group, the second LED light group is made to shine, at this time first
LED light group shines simultaneously with the second LED light group；
During voltage VLED2 rises to the first LED light group stopping luminous voltage, the first LED light group and the 2nd LED
Lamp group shines simultaneously, and input voltage continues to increase, and the second LED light group gradually brightens, at this time since input voltage Vo gradually increases
Greatly, the output voltage V1 and output current VLED2 of the second LED light group increase therewith, make output to controllable accurate regulated power supply
It enables controllable accurate regulated power supply end with reference to the voltage increase of pole, so that the second NPN triode is connected, enable the first NPN triode
The current potential VB of base stage is reduced, to make VBE=VB-R5（I1+I2）It constantly reduces, wherein R5 is the 5th resistance, I1 first
The electric current of LED light group output, the electric current that I2 is the output of the second LED light group, keep the first LED light group gradually dimmed, work as input voltage
When increasing to the voltage that the stopping of the first LED light group shines, VBE is reduced to setting value, the cut-off of the first NPN triode to make the first LED
Lamp group is extinguished；
During the voltage that the first LED light group stops shining rises to maximum voltage, the first LED light group does not shine, the
Two LED light groups gradually brighten.
This programme has the beneficial effect that：Prevent LED light from being flickered when opening, this programme is by being arranged capacitance and tri- poles NPN
Pipe, in the rigid input voltage of circuit, voltage first flow in capacitance and charges, and makes the base of the NPN triode of control LED light opening and closing
Extremely without control source, triode is made to end, one group of LED light is made temporarily to be not turned on, after capacitor charging is complete, this group of LED light is opened
It opens, then coordinates the effect of controllable accurate regulated power supply, it is therefore prevented that arriving again separately occurs extinguishing after one group of LED flickers in booting in LED
One group of LED light starts；It is provided with controllable accurate regulated power supply in circuit simultaneously, makes the voltage stabilization of circuit；This programme simultaneously
Also by the effect of the first NPN triode, the brightness and opening and closing of two groups of LED light are controlled, to realize while control the bright of LED light
Degree and color.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Fig. 2 is the circuit diagram of controllable accurate regulated power supply of the present invention.
Specific implementation mode
The present invention is further explained in the light of specific embodiments：
Shown in attached drawing 1, can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of booting, including first resistor R1,
Second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, controllable accurate regulated power supply TL431,
First LED light group LED1, the second LED light group LED2, the first NPN triode Q1, the second NPN triode Q2, the first capacitance C1 with
Second capacitance C2, the first LED light group LED1 and the second LED light group LED2 is composed in series by multiple LED light, the peripheral hardware being preset with
Power supply is separately connected first resistor R1, second resistance R2,3rd resistor R3, the first LED light group LED1 and the second LED light group
LED2, first resistor R1 are separately connected the base stage of the cathode K and the second NPN triode Q2 of controllable accurate regulated power supply TL431, can
The anode A ground connection of the accurate regulated power supply TL431 of control；Second resistance R2 the second capacitances of connection C2, the controllable essence of the second capacitance C2 connections
The reference pole R of close regulated power supply TL431；3rd resistor R3 is separately connected the collector of the second NPN triode Q2, the first capacitance
The emitter of the base stage of C1, the 6th resistance R6 and the first NPN triode Q1, the second NPN triode Q2 connects the 4th resistance R4, the
Four resistance R4 ground connection, the first capacitance C1 ground connection, the 6th resistance R6 ground connection；First LED light group LED1 the first NPN triode Q1s of connection
Collector, the emitter of the first NPN triode Q1 is separately connected the ginseng of the 5th resistance R5 and controllable accurate regulated power supply TL431
Examining pole R, the second LED light group LED2 is separately connected the reference pole R of the 5th resistance R5 and controllable accurate regulated power supply TL431, and the 5th
Resistance R5 ground connection.
Shown in attached drawing 2, controllable accurate regulated power supply TL431 includes operational amplifier, a reference source and tri- poles the 3rd NPN
The backward end of the reference pole R connection operational amplifiers of pipe Q3, controllable accurate regulated power supply TL431, the end in the same direction of operational amplifier
Connect a reference source that voltage is 2.5V, a reference source ground connection, the base of the output end connection third NPN triode Q3 of operational amplifier
Pole, the collector of the cathode K connection third NPN triodes Q3 of controllable accurate regulated power supply TL431, third NPN triode Q3's
Emitter connects the anode A of controllable accurate regulated power supply TL431.
Wherein, first resistor R1, second resistance R2,3rd resistor R3, the resistance value of the 4th resistance R4 and the 6th resistance R6 are equal
It is 24k Ω more than the 5th resistance R5, specially the resistance value R1 of first resistor R1, the resistance value R2 of second resistance R2 is 3.3k Ω, the
The resistance value R3 of three electricity is that the resistance value R4 of 24k Ω, the 4th resistance R4 are 360 Ω, and the resistance value R5 of the 5th resistance R5 is 1 Ω, the 6th electricity
The resistance value R6 for hindering R6 is 100k Ω；
The effect of first resistor R1 and 3rd resistor R3 is current limliting, prevents from flowing to controllable accurate regulated power supply TL431, first
NPN triode Q1 and the electric current of the second NPN triode Q2 are excessive, since first resistor R1 and the resistance value of 3rd resistor R3 are
24k Ω, thus usually by the current control of first resistor R1 and 3rd resistor R3 outputs in 10mA hereinafter, i.e. first resistor R1 with
The effect of 3rd resistor R3 is to prevent NPN triode from being burnt out because input current is excessive, and the effect of the 6th resistance R6 is in circuit
It closes after stopping control source, the voltage in the first capacitance C1 flow to the 6th resistance R6, makes the 6th resistance R6 by the first capacitance C1
Interior voltage completely consumes；The resistance value of 4th resistance R4 and the 5th resistance R5 is inversely proportional, and the 4th resistance R4 and the 5th resistance R5
The first LED light group of resistance value co- controlling LED1 stop luminous voltage in the present embodiment circuit, and the 5th resistance R5
Resistance value is smaller, and the energy consumption of circuit is smaller.
Wherein, by the deadline of second resistance R2 and second capacitance C2 the second capacitances of co- controlling C2, from the second capacitance
When C2 is started to charge up, after the R2*C2 times, the second capacitance C2 chargings finish, and the second radio station is made to end, wherein the second capacitance C2
Capacitance is C2.
The startup voltage for starting voltage and being less than the second LED light group LED2 of first LED light group LED1, the first LED light group
LED1 sends out warm light, and the second LED light group LED2 sends out cold light；The conducting voltage of first NPN triode Q1 is 0.7V, that is, works as VBE<
When 0.7V, VBE is worked as in the cut-off of the first NPN triode Q1>0.7V, the conducting of the first NPN triode Q1.
The working method of the present embodiment is：
In the moment of circuit booting, external power input, the voltage of circuit gradually rises from zero to maximum voltage at this time,
During being somebody's turn to do, voltage flow to first resistor R1, second resistance R2,3rd resistor R3, the first LED light group LED1 and second respectively
LED light group LED2, and when voltage flows through 3rd resistor R3, since the first capacitance C1 short circuit effects being just switched on make from 3rd resistor
The voltage of R3 outputs flow to the first capacitance C1 and charges to the first capacitance C1 entirely（Through 3rd resistor R3's and the 6th resistance R6
After shunting, the voltage for flowing to the first capacitance C1 is R6/（R6+R3）, work as R6/（R6+R3））；When to charge to its defeated by the first capacitance C1
Go out voltage and reaches setting value（That is voltage VBE of the base stage of the first NPN triode Q1 to emitter>0.7V）When, tri- poles the first NPN
Pipe Q1 conductings；When voltage flows through second resistance R2 and flow to the second capacitance C2 simultaneously, the second capacitance C2 regards short circuit as at this time, then voltage
It is input to the reference pole of controllable accurate regulated power supply through the second capacitance C2, so that controllable accurate regulated power supply TL431 is ended, specifically
For when voltage is input to the reference pole of controllable accurate regulated power supply through the second capacitance C2, voltage can flow to the anti-of operational amplifier
Xiang Duan, the voltage that the backward end of operational amplifier inputs at this time are more than 2.5V, and the output end of operational amplifier is made to export low level,
So that third NPN triode Q3 is ended, the voltage that first resistor R1 is exported to controllable accurate regulated power supply TL431 is made to become with electric current
The voltage and electric current that first resistor R1 is exported to the second NPN triode Q2；To make the base stage of the second NPN triode Q2 obtain electricity
Pressure enables the second NPN triode Q2 conductings, after the second NPN triode Q2 conductings, from the collector of the second NPN triode Q2 to transmitting
The voltage VBE of pole<0.3V makes the current potential VB that the first NPN triode Q1 base stage obtains reduce, makes from the first NPN triode Q1 base
The voltage VBE that pole flows to emitter is reduced to setting value（0.7V）, enable the first NPN triode Q1 end, make the first LED light group
LED1 does not shine；After being set the time, the voltage of power input rises to maximum value, and the second LED light group LED2 shines, and realization is being opened
The first LED light group of moment of machine high input voltage does not shine, and only the second LED light group shines；
When input voltage Vo is low-voltage, starts voltage VLED2 since the second LED light group LED2 is not up to it, make the
Two LED light group LED2 do not shine, and the first LED light group LED1 shines, and are the mistake that minimum voltage rises to voltage VLED2 in input voltage
Journey, the first LED light group LED1 gradually brighten, and the second LED light group LED2 does not shine；
When input voltage increases to the startup voltage VLED2 of the second LED light group LED2, the second LED light group LED2 is made to shine,
The first LED light group LED1 and the second LED light group LED2 shines simultaneously at this time；
The first LED light group LED1 is risen to during the present embodiment circuit stops luminous voltage in voltage VLED2, the
One LED light group LED1 shines simultaneously with the second LED light group LED2, and input voltage continues to increase, and the second LED light group LED2 is gradual
Brighten, at this time since input voltage Vo gradually increases, the output voltage V1 and output current VLED2 of the second LED light group LED2 with
Increase, make output to the reference pole R of controllable accurate regulated power supply TL431 voltage increase enable controllable accurate regulated power supply
TL431 ends（Export to the voltage of the reference pole R of controllable accurate regulated power supply TL431 makes operational amplifier more than 2.5V
Output end exports low level, and third NPN triode Q3 is made to end）, make the second NPN triode Q2 conductings, enable the first NPN triode
The current potential VB of the base stage of Q1 is reduced, to make VBE=VB-R5（I1+I2）It constantly reduces, wherein R5 is the 5th resistance R5 resistance values, I1
Electric current, I2 for the first LED light group LED1 output are the electric current of the second LED light group LED2 outputs, make the first LED light group LED1 by
Gradual change is dark, and when input voltage, which increases to the first LED light group LED1, stops luminous voltage, VBE is reduced to setting value（That is VBE>
0.7V）, the cut-off of the first NPN triode Q1 makes the first LED light group LED1 extinguish；
During the voltage that the first LED light group LED1 stops shining rises to maximum voltage, the first LED light group LED1 is not
It shines, the second LED light group LED2 gradually brightens.
It is divided into three phases when i.e. the circuit of the present embodiment works, the first stage is that minimum voltage rises to voltage VLED2, should
In the process, the first LED light group LED1 shines and gradually brightens as voltage increases, and the second LED light group LED2 does not shine；Second
Stage is that voltage VLED2 rises to the first LED light group LED1 and stops luminous voltage, in this process, the first LED light group LED1 with
Second LED light group LED2 shines, and as voltage increases, and the first LED light group LED1 is gradually dimmed to extinguishing, the second LED light
Group LED2 gradually brightens；Phase III is that the voltage that the first LED light group LED1 stops shining rises to maximum voltage, in the process
In, the first LED light group LED1 does not shine, and the second LED light group LED2 gradually brightens to most bright.
The embodiment of the above is only presently preferred embodiments of the present invention, not does limit in any form to the present invention
System.Any technical person familiar with the field utilizes the skill of the disclosure above without departing from the scope of the technical proposal of the invention
Art content makes more possible variations and retouching to technical solution of the present invention, or modification is the equivalent embodiment of the present invention.
Therefore all contents without departing from technical solution of the present invention, equivalent equivalence changes, should all be covered by made by thinking according to the present invention
In protection scope of the present invention.
Claims (5)
1. can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of booting, it is characterised in that：Including first resistor, the second electricity
Resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, controllable accurate regulated power supply, the first LED light group, the second LED light
Group, the first NPN triode, the second NPN triode, the first capacitance and the second capacitance, first LED light group and the second LED light
Group is composed in series by multiple LED light, and the external power being preset with is separately connected the first resistor, second resistance, third electricity
Resistance, the first LED light group and the second LED light group, the first resistor are separately connected the cathode and second of controllable accurate regulated power supply
The base stage of NPN triode, the plus earth of the controllable accurate regulated power supply；The second resistance connects the second capacitance, described
The reference pole of second capacitance connection controllable accurate regulated power supply；The 3rd resistor is separately connected the current collection of the second NPN triode
Pole, the first capacitance, the 6th resistance and the first NPN triode base stage, second NPN triode emitter connection the 4th electricity
Resistance, the 4th resistance eutral grounding, first capacity earth, the 6th resistance eutral grounding；The first LED light group connection first
The collector of NPN triode, the emitter of the first NPN triode are separately connected the ginseng of the 5th resistance and controllable accurate regulated power supply
Pole is examined, second LED light group is separately connected the reference pole of the 5th resistance and controllable accurate regulated power supply, and the 5th resistance connects
Ground.
2. it is according to claim 1 can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of booting, it is characterised in that：
The first resistor, second resistance, 3rd resistor, the resistance value of the 4th resistance and the 6th resistance are all higher than the 5th resistance, and described
The resistance value of four resistance and the 5th resistance is inversely proportional.
3. it is according to claim 1 can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of booting, it is characterised in that：
The startup voltage for starting voltage and being less than the second LED light group of first LED light group.
4. it is according to claim 1 can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of booting, it is characterised in that：
First LED light group sends out warm light, and the second LED light group sends out cold light.
5. it is a kind of as described in claim 1 can the anti-lightning road of booting of adjusting brightness of LED lamps and color simultaneously working method,
It is characterized in that：In the moment of circuit booting, external power inputs, and the voltage of circuit gradually rises from zero to maximum electricity at this time
Pressure, in this process, voltage flow to first resistor, second resistance, 3rd resistor, the first LED light group and the second LED light respectively
Group, and when voltage flows through 3rd resistor, since the short circuit effect that the first capacitance has just been switched on keeps the voltage exported from 3rd resistor complete
It flow to the first capacitance and charges to the first capacitance；When the first capacitor charging reaches setting value to its output voltage, first
NPN triode is connected；When voltage flows through second resistance and flow to the second capacitance simultaneously, the second capacitance regards short circuit as at this time, then voltage
It is input to the reference pole of controllable accurate regulated power supply through the second capacitance, so that controllable accurate regulated power supply is ended, to make the 2nd NPN
The base stage of triode, which obtains voltage, enables the second NPN triode be connected, and the current potential VB that the first NPN transistor base obtains is made to reduce,
So that the voltage VBE for flowing to emitter from the first NPN transistor base is reduced to setting value, the first NPN triode is enabled to end, makes the
One LED light group does not shine；After being set the time, the voltage of power input rises to maximum value, and the second LED light group shines, and realizes
The first LED light group of moment of booting high input voltage does not shine, and only the second LED light group shines；When input voltage Vo is low-voltage
When, starting voltage VLED2 since the second LED light group is not up to it, the second LED light group is made not shine, the first LED light group shines,
It is the process that minimum voltage rises to voltage VLED2 in input voltage, the first LED light group gradually brightens, and the second LED light group is not sent out
Light；When input voltage increases to the startup voltage VLED2 of the second LED light group, the second LED light group is set to shine, at this time the first LED light
Group shines simultaneously with the second LED light group；During voltage VLED2 rises to the first LED light group stopping luminous voltage, first
LED light group shines simultaneously with the second LED light group, and input voltage continues to increase, and the second LED light group gradually brightens, at this time due to
Input voltage Vo gradually increases, and the output voltage V1 and output current VLED2 of the second LED light group increase therewith, and output is made extremely may be used
The voltage increase of the reference pole of the accurate regulated power supply of control enables controllable accurate regulated power supply end, and so that the second NPN triode is connected, enables
The current potential VB of the base stage of first NPN triode is reduced, to make VBE=VB-R5（I1+I2）It constantly reduces, wherein R5 is the 5th electricity
Resistance resistance value, I1 are the electric current of the first LED light group output, the electric current that I2 is the output of the second LED light group, keep the first LED light group gradual
Dimmed, when input voltage, which increases to the first LED light group, stops luminous voltage, VBE is reduced to setting value, tri- poles the first NPN
Pipe ends, and the first LED light group is made to extinguish；During the voltage that the first LED light group stops shining rises to maximum voltage, first
LED light group does not shine, and the second LED light group gradually brightens.
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| CN107484299B (en) * | 2017-09-11 | 2024-04-19 | 四川蓝景光电技术有限责任公司 | LED lamp brightness and color temperature adjusting control circuit based on one-way PWM and implementation method thereof |
| CN107690213B (en) * | 2017-10-17 | 2024-05-24 | 无锡恒芯微科技有限公司 | Non-isolated low-voltage non-flicker LED driving circuit |
| CN108934110B (en) * | 2018-08-20 | 2020-01-31 | 浙江凯耀照明股份有限公司 | Dimming control circuit and method for LED lamp at low brightness |
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2017
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| CN1832645A (en) * | 2005-03-08 | 2006-09-13 | 夏普株式会社 | Light emitting apparatus generating white light by mixing of light of a plurality of oscillation wavelengths |
| CN102665325A (en) * | 2012-04-12 | 2012-09-12 | 深圳市华星光电技术有限公司 | LED backlight drive circuit, backlight module and liquid crystal display device |
| CN103200735A (en) * | 2013-03-06 | 2013-07-10 | 广州凯盛电子科技有限公司 | Light-emitting diode (LED) actuator preventing LED from flickering |
| CN206674251U (en) * | 2017-03-30 | 2017-11-24 | 佛山市华永泰光电科技有限公司 | Can simultaneously adjusting brightness of LED lamps and color the anti-lightning road of start |
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| CN106879120A (en) | 2017-06-20 |
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