CN104735882A - LED dimming and color adjusting circuit - Google Patents
LED dimming and color adjusting circuit Download PDFInfo
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- CN104735882A CN104735882A CN201510163133.5A CN201510163133A CN104735882A CN 104735882 A CN104735882 A CN 104735882A CN 201510163133 A CN201510163133 A CN 201510163133A CN 104735882 A CN104735882 A CN 104735882A
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Abstract
The invention discloses an LED dimming and color adjusting circuit. The LED dimming and color adjusting circuit comprises a rectifying module, a fuse, a voltage transformation module, a protecting module, a filter module, a control module, a PWM adjustment module, a color adjusting module and a dimming module. The rectifying module is used for converting an alternating current into a direct current. The fuse is connected between the rectifying module and an alternating-current power source. The voltage transformation module is connected with the output end of the rectifying module and used for transforming the voltage of the direct current output by the rectifying module. The protecting module is connected with the input end of the voltage transformation module. The filtering module is used for filtering the current output by a transformer. The rectifying module, the voltage transformation module and the protecting module are all connected with the control module. The control module is used for controlling the voltage output by the voltage transformation module. The PWM adjusting module is connected with the filtering module and used for generating PWM control signals. The color adjusting module is connected with the PWM adjusting module and is used for adjusting the color of an LED lamp. The dimming module is connected with the PWM adjusting module and is used for adjusting the brightness of the LED lamp. The LED dimming and color adjusting circuit can achieve constant-voltage power supply and has good dimming and color adjusting effects.
Description
Technical field
The present invention relates to LED lamplight technical field, be specifically related to a kind of LED light modulation toning circuit.
Background technology
Because the brightness of LED is almost directly proportional with its drive current, therefore usually adopt the method for adjustment LED forward current to adjust brightness, method is simple, practical.But for LED supply module, boosting in supply module, step-down drive circuit need to sample to the voltage of LED, adjust the supply power voltage of LED afterwards, because the forward voltage VF of LED is with electric current proportional relation, when LED electric current reduces to very little, it is very little that the VF value of LED can become, and causes booster driving circuit not work or cause step-down drive circuit pressure reduction excessive and work abnormal, thus be difficult to realize constant voltage and power.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of rational in infrastructure, the LED light modulation toning circuit that constant voltage powers can be realized.
For achieving the above object, the present invention adopts following technical scheme:
A kind of LED light modulation toning circuit, comprising:
Rectification module, it is for converting alternating current to direct current;
Fuse, it is connected between rectification module and AC power;
Voltage changing module, it is connected with the output of rectification module, carries out transformation for the direct current exported by rectification module;
Protection module, it is connected with the input of voltage changing module;
Filtration module, it is connected with the output of voltage changing module, and the electric current that filtration module is used for transformer exports filters,
Control module, rectification module, voltage changing module and protection module are all connected with control module; This control module for controlling the work of rectification module and protection module, and controls the voltage of voltage changing module output;
PWM adjusting module, it is connected with filtration module, and PWM adjusting module is used for according to generation pwm control signal; This pwm control signal comprises toning signal and dim signal;
Toning module, it is connected with PWM adjusting module, and toning module is used for mixing colours to LED according to toning signal;
Light-adjusting module, it is connected with PWM adjusting module, and light-adjusting module is used for according to dim signal LED light modulation.
Preferably, described PWM adjusting module comprises SN8P2722 single-chip microcomputer and filter capacitor, this electric capacity with SN8P2722 single-chip microcomputer VDD pin, VSS pin is all connected and filtration module all connects, SN8P2722 single-chip microcomputer for export toning signal P5.3 pin with toning model calling; Being connected with light-adjusting module for the P5.4 pin exporting dim signal of SN8P2722 single-chip microcomputer.
Preferably, described rectification module comprises the first rectifying tube, the second rectifying tube, the 3rd rectifying tube and the 4th rectifying tube, and the first rectifying tube and the second rectifying tube are connected into the first series circuit; 3rd rectifying tube and the 4th rectifying tube are connected into the second series circuit, and this first series circuit is in parallel with the second series circuit.
Preferably, the input of described fuse is connected with AC power, the output of this fuse and being connected in parallel between the 3rd rectifying tube and the 4th rectifying tube.
Preferably, described control module comprises OB3396 integrated circuit.
Preferably, described toning module comprises a mos pipe, the first current-limiting resistance and the second current-limiting resistance, described first current-limiting resistance is connected with the grid of a mos pipe and the P5.4 pin of SN8P2722 single-chip microcomputer all connects, and described second current-limiting resistance is connected with the first current-limiting resistance and filtration module.
Preferably, described light-adjusting module comprises the 2nd mos pipe, the 3rd current-limiting resistance and the 4th current-limiting resistance, described 3rd current-limiting resistance is connected with the grid of the 2nd mos pipe and the P5.3 pin of SN8P2722 single-chip microcomputer all connects, and described 4th current-limiting resistance is connected with the 3rd current-limiting resistance and filtration module.
Beneficial effect of the present invention:
Compared with prior art, the present invention produces dim signal by PWM adjusting module and toning signal is embodied as LED light modulation toning respectively by light-adjusting module and toning module, it is mainly used in PWM signal to regulate luminosity and the colour temperature of LED lamp, thus LED stroboscopic phenomenon can not occur when accomplishing that light modulation is mixed colours, light modulation toning is effective.And controlled the magnitude of voltage of voltage changing module output by control module, make the voltage constant voltage of the PWM adjusting module of LED light modulation of the present invention toning circuit, toning module and light-adjusting module.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of LED light modulation toning circuit in embodiments of the invention;
Fig. 2 is the connecting circuit figure of rectification module, fuse, voltage changing module, protection module, filtration module and control module in embodiments of the invention;
Fig. 3 be PWM adjusting module in embodiments of the invention, toning module and light-adjusting module connect circuit diagram.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the present invention is described further:
Referring to figs. 1 through Fig. 3, a kind of LED light modulation toning circuit described in the present embodiment, comprises rectification module 1, fuse 2, voltage changing module 3, protection module 4, filtration module 5, control module 6, PWM adjusting module 7, toning module 8 and light-adjusting module 9.Described rectification module 1 is for converting alternating current to direct current.Described fuse 2 is connected between rectification module 1 and AC power.Voltage changing module 3 is connected with the output of rectification module 2, carries out transformation for the direct current exported by rectification module 2, such as, will be low pressure by high pressure.Protection module 4 is connected with the input of voltage changing module 3.Protection module 4 is for the protection of toning module 8 and light-adjusting module 9.Filtration module 5 is connected with the output of voltage changing module 3, and it filters for the electric current exported transformer 3.Rectification module 1, voltage changing module 3 and protection module 4 are all connected with control module 7.Described control module 6 for controlling the work of rectification module 2 and protection module 4, and controls the voltage of voltage changing module 4 output.PWM adjusting module 7 is connected with filtration module 5, and PWM adjusting module 7 is for generation of pwm control signal.This pwm control signal comprises toning signal and dim signal.Preferably, described control module adopts OB3396 integrated circuit.Toning module 8 is connected with PWM adjusting module 7, for mixing colours to LED according to toning signal.Light-adjusting module 9 is connected with PWM adjusting module 1, for according to dim signal to LED light modulation.
Described rectification module 1 comprises the first rectifying tube D1, the second rectifying tube D2, the 3rd rectifying tube D3 and the 4th rectifying tube D3, and the first rectifying tube D1 and the second rectifying tube D2 is connected into the first series circuit.3rd rectifying tube D3 and the 4th rectifying tube D4 is connected into the second series circuit, and this first series circuit is in parallel with the second series circuit.The input of described fuse 2 is connected with AC power, the output of this fuse 2 and being connected in parallel between the 3rd rectifying tube D3 and the 4th rectifying tube D4.When there is short circuit phenomenon, fuse 2 fuses automatically, ensures the fail safe of whole circuit.
Described PWM adjusting module comprises SN8P2722 single-chip microcomputer and filter capacitor C11, this filter capacitor C11 with SN8P2722 single-chip microcomputer VDD pin, VSS pin is all connected and filtration module all connects, SN8P2722 single-chip microcomputer for export toning signal P5.3 pin with toning model calling; Being connected with light-adjusting module for the P5.4 pin exporting dim signal of SN8P2722 single-chip microcomputer.Be used for that secondary filter is carried out to the electric current of filtering module input by described filter capacitor and ensure that SN8P2722 monolithic function more accurately pwm control signal occurs further.
Described toning module 8 comprises a mos pipe Q1, the first current-limiting resistance R17 and the second current-limiting resistance R18, described first current-limiting resistance R17 is connected with the grid of a mos pipe Q1 and the P5.4 pin of SN8P2722 single-chip microcomputer all connects, and described second current-limiting resistance R18 is connected with the first current-limiting resistance R17 and filtration module 5.
Described light-adjusting module 9 comprises the 2nd mos pipe Q2, the 3rd current-limiting resistance R23 and the 4th current-limiting resistance R24, described 3rd current-limiting resistance R23 is connected with the grid of the 2nd mos pipe Q2 and the P5.3 pin of SN8P2722 single-chip microcomputer all connects, and described 4th current-limiting resistance R24 is connected with the 3rd current-limiting resistance R23 and filtration module 5.
Operation principle of the present invention:
When alternating current is powered for described PWM adjusting module 7, toning module 8 and light-adjusting module 9 successively after becoming the constant-voltage power supply of comparatively low pressure (such as 5V) after rectification module 1, voltage changing module 3 and filtration module 5, when the signal input interface J1 be connected with rectification module 1 receives signal, the pulsewidth of the dim signal that PWM adjusting module 7 exports is widened, the many white lights of gold-tinted are few, colour temperature after colour mixture will be partially yellow gradually, until interface J1 stops Received signal strength or LED colour temperature to change to the most yellow (namely colour temperature is 3000K); When interface J1 again acknowledge(ment) signal time, colour temperature will changing inversely, and namely colour temperature is partially white gradually, until interface J1 stops Received signal strength or colour temperature to change to the whitest (namely colour temperature is 6500K); When interface J1 acknowledge(ment) signal again, can turn yellow again, circulation change like this, realizes toning process.
When the signal input interface J2 be connected with rectification module 1 receives signal, the pulsewidth of the dim signal that PWM adjusting module 7 will be made to export is widened, thus the current i making filtering module defeated 5 go out rises gradually, then user can see that the brightness of LED lamplight increases gradually, until brightness reaches the brightest or input interface J2 stop Received signal strength time brightness just stop increase; When input interface J2 receives signal again, LED light modulation again can be dimmed gradually, until brightness just stops dimmed when brightness reaches the darkest or input interface J2 stops Received signal strength; When input interface J2 receives signal again, desk lamp can brighten again, so circulates; Realize dimming process.
In sum, the present invention produces dim signal by PWM adjusting module 7 and toning signal is embodied as LED light modulation toning respectively by light-adjusting module and toning module, it is mainly used in PWM signal to regulate luminosity and the colour temperature of LED lamp, thus when accomplishing that light modulation is mixed colours can not there is stroboscopic phenomenon in LED, and controlled the magnitude of voltage of voltage changing module 3 output by control module 6, make the voltage constant voltage of the PWM adjusting module 7 of LED light modulation of the present invention toning circuit, toning module 8 and light-adjusting module 9.
To one skilled in the art, according to technical scheme described above and design, other various corresponding change and deformation can be made, and all these change and deformation all should belong within the protection range of the claims in the present invention.
Claims (7)
1. a LED light modulation toning circuit, is characterized in that, comprising:
Rectification module, it is for converting alternating current to direct current;
Fuse, it is connected between rectification module and AC power;
Voltage changing module, it is connected with the output of rectification module, carries out transformation for the direct current exported by rectification module;
Protection module, it is connected with the input of voltage changing module;
Filtration module, it is connected with the output of voltage changing module, and the electric current that filtration module is used for transformer exports filters,
Control module, rectification module, voltage changing module and protection module are all connected with control module; This control module for controlling the work of rectification module and protection module, and controls the voltage of voltage changing module output;
PWM adjusting module, it is connected with filtration module, and PWM adjusting module is used for according to generation pwm control signal; This pwm control signal comprises toning signal and dim signal;
Toning module, it is connected with PWM adjusting module, and toning module is used for mixing colours to LED according to toning signal;
Light-adjusting module, it is connected with PWM adjusting module, and light-adjusting module is used for according to dim signal LED light modulation.
2. LED light modulation toning circuit according to claim 1, is characterized in that,
Described PWM adjusting module comprises SN8P2722 single-chip microcomputer and filter capacitor, this electric capacity with SN8P2722 single-chip microcomputer VDD pin, VSS pin is all connected and filtration module all connects, SN8P2722 single-chip microcomputer for export toning signal P5.3 pin with toning model calling; Being connected with light-adjusting module for the P5.4 pin exporting dim signal of SN8P2722 single-chip microcomputer.
3. LED light modulation toning circuit according to claim 2, it is characterized in that, described rectification module comprises the first rectifying tube, the second rectifying tube, the 3rd rectifying tube and the 4th rectifying tube, and the first rectifying tube and the second rectifying tube are connected into the first series circuit; 3rd rectifying tube and the 4th rectifying tube are connected into the second series circuit, and this first series circuit is in parallel with the second series circuit.
4. LED light modulation according to claim 3 toning circuit, it is characterized in that, the input of described fuse is connected with AC power, the output of this fuse and being connected in parallel between the 3rd rectifying tube and the 4th rectifying tube.
5. the LED light modulation toning circuit according to any one of claim 1-4, it is characterized in that, described control module comprises OB3396 integrated circuit.
6. the LED light modulation toning circuit according to any one of claim 2-4, it is characterized in that, described toning module comprises a mos pipe, the first current-limiting resistance and the second current-limiting resistance, described first current-limiting resistance is connected with the grid of a mos pipe and the P5.4 pin of SN8P2722 single-chip microcomputer all connects, and described second current-limiting resistance is connected with the first current-limiting resistance and filtration module.
7. the LED light modulation toning circuit according to any one of claim 2-4, it is characterized in that, described light-adjusting module comprises the 2nd mos pipe, the 3rd current-limiting resistance and the 4th current-limiting resistance, described 3rd current-limiting resistance is connected with the grid of the 2nd mos pipe and the P5.3 pin of SN8P2722 single-chip microcomputer all connects, and described 4th current-limiting resistance is connected with the 3rd current-limiting resistance and filtration module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510163133.5A CN104735882A (en) | 2015-04-08 | 2015-04-08 | LED dimming and color adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510163133.5A CN104735882A (en) | 2015-04-08 | 2015-04-08 | LED dimming and color adjusting circuit |
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| CN104735882A true CN104735882A (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510163133.5A Pending CN104735882A (en) | 2015-04-08 | 2015-04-08 | LED dimming and color adjusting circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025628A (en) * | 2015-07-28 | 2015-11-04 | 江苏达伦电子股份有限公司 | Multicolor LED lamp control system |
| CN107124789A (en) * | 2017-05-11 | 2017-09-01 | 郑州珂玛影视光电有限公司 | The Jing Yin drive circuits of the LED of illumination and adjustable color of Width funtion multichannel input |
| CN107529252A (en) * | 2017-08-28 | 2017-12-29 | 广东明丰电源电器实业有限公司 | Touch dimming driving circuit and LED lamp |
| CN107635305A (en) * | 2017-08-30 | 2018-01-26 | 广东云控照明信息科技有限公司 | A kind of LED drive circuit |
| CN108777906A (en) * | 2018-06-25 | 2018-11-09 | 珠海惠尔益电子科技有限公司 | A kind of double lamp group zoom circuits and head lamp |
-
2015
- 2015-04-08 CN CN201510163133.5A patent/CN104735882A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025628A (en) * | 2015-07-28 | 2015-11-04 | 江苏达伦电子股份有限公司 | Multicolor LED lamp control system |
| CN107124789A (en) * | 2017-05-11 | 2017-09-01 | 郑州珂玛影视光电有限公司 | The Jing Yin drive circuits of the LED of illumination and adjustable color of Width funtion multichannel input |
| CN107529252A (en) * | 2017-08-28 | 2017-12-29 | 广东明丰电源电器实业有限公司 | Touch dimming driving circuit and LED lamp |
| CN107635305A (en) * | 2017-08-30 | 2018-01-26 | 广东云控照明信息科技有限公司 | A kind of LED drive circuit |
| CN108777906A (en) * | 2018-06-25 | 2018-11-09 | 珠海惠尔益电子科技有限公司 | A kind of double lamp group zoom circuits and head lamp |
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Application publication date: 20150624 |
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