CN207854221U - A kind of intelligent LED control device - Google Patents

Abstract

The utility model discloses a kind of intelligent LED control devices, including inputting AC, sequentially connected AC rectification circuits, primary energy circuit, isolation constant pressure conversion circuit, secondary voltage feedback circuit, the output adjustable optical circuits of DC DC, and with respectively with secondary voltage feedback circuit and input the microcomputer circuit that AC connect；Microcomputer power supply circuit and secondary voltage value detection circuit are equipped between microcomputer circuit and secondary voltage feedback circuit；It inputs AC and is equipped with input state detection circuit, primary energy circuit stores the direct current of input by big capacity electrolyte capacitor C4~C8.Design is scientific and reasonable for intelligent LED control device provided by the utility model, circuit framework is simple, light extraction is more stable, accomplish no stroboscopic, narrow light pulse and its caused brightness in visual persistence are felt, it designs unique Nai Beixi and comfortably switchs controlling curve, accomplish perfect matching human-eye visual characteristic.

Description

A kind of intelligent LED control device

Technical field

The utility model is related to technical field of electric device control, are that output current exists when a kind of input AC is powered on specifically Certain time slowly rises to maximum from zero, and output current can slowly decline within a certain period of time up to zero when input AC is turned off Intelligent LED control device.

Background technology

LED control devices are the core components of LED lamp, shine for LED lamp bead and provide energy.LED, that is, light emitting diode, It is a kind of solid state semiconductor devices, electric energy directly can be converted into luminous energy by it, and semiconductor wafer consists of two parts, one It is P-type semiconductor to divide, and hole is occupied an leading position inside it, and the other end is N-type semiconductor, is mainly electronics in this side.But this When two kinds of semiconductors connect, just formation one " P-N junction " between them.When electric current acts on this crystalline substance by conducting wire When piece, electronics will be pushed to the areas P, and in the areas P then electronics will send out energy with hole-recombination in the form of photon Amount, here it is the principles that LED shines.Input currents and luminous intensity of the LED in limit value are directly proportional.

Daily life be unable to do without lamp lighting, but it is short all to allow the eyes of people to generate when each ON/OFF lamps and lanterns The feeling temporarily blinded.This is because caused by the vision adaptive of people, in eyes coloured part iris, iris center Black hole can control the size of pupil pupil, iris, to change the power into the light of eyes.People from from bright suddenly into To at dark, eyes can not whatever be seen the short time, this cries the dark adaptation of eyes, otherwise be light adaptation.Dark adaptation：This is Since pupil amplifies, cellula visualis conversion replaces cone cell, whole process adaptation process to need (10-30 by rhabdocyte Second)；Luminance adaptation:This is because myosis, cellula visualis conversion replace rhabdocyte, this process by cone cell Several seconds are only needed, this is because cone cell replys vision needed for work than rhabdocyte much shorter.

Problem of the existing technology：

1. conventional LED control devices are all to input output current when AC is powered on directly to reach preset value, input AC shutdowns When LED control devices can turn off in a short period of time

Delay within a certain period of time 2. some LED control devices with soft start can accomplish to input output current when AC is powered on Output current slowly declines when rising to maximum slowly, but not accomplishing powered-down.

3. the LED control devices (such as remote controler, wifi, bluetooth, the controls such as Zigbee) with intelligent control, can accomplish When input AC is powered on or output current can slowly rise to maximum within a certain period of time when standby mode is restarted；In AC Input can be remotely controlled in the case of not powering off or APP controls are turned off the light, and output can slowly decline in setting time until entering Standby mode.But be also when not accomplishing powered-down output current slowly decline.When the shortcomings that such control device is standby mode It needs to consume electricity for a long time, it is not environmentally energy saving.

Utility model content

The purpose of this utility model is to provide a kind of at low cost, intelligent LED control devices of human oriented design.

In order to overcome above-mentioned defect in the prior art, the utility model adopts the following technical solution：

A kind of intelligent LED control device, including input AC, sequentially connected AC rectification circuits, primary energy circuit, isolation Constant pressure conversion circuit, secondary voltage feedback circuit, output the adjustable optical circuits of DC-DC, and with respectively with secondary voltage feed back electricity The microcomputer circuit that road is connected with input AC；Between the microcomputer circuit and secondary voltage feedback circuit be equipped with microcomputer power supply circuit and Secondary voltage value detection circuit；The input AC is equipped with input state detection circuit, and input state detection circuit passes through resistance Current limliting is divided, is connected to optocoupler U5 input terminals, optocoupler output is connected to the I/O feet of microcomputer circuit；The primary energy circuit The direct current of input is stored by big capacity electrolyte capacitor C4~C8, after the power-off of input AC electricity, electrolytic capacitor is storage Electric energy slowly release, allow control device continue to run with a period of time.

Further, APFC circuits, APFC circuits difference are additionally provided between the AC rectification circuits and primary energy circuit It is connect with AC rectification circuits, primary energy circuit.

Further, input AC electricity is rectified into direct current by the AC rectification circuits by bridge heap BD1.

Further, the secondary voltage feedback circuit passes through optocoupler U1 control isolation by CJ431 reference voltage-stabilizing circuits The switching frequency of constant pressure conversion circuit makes secondary setting voltage constant.

Further, the secondary voltage value detection circuit is connected to the microcontroller IC4 of microcomputer circuit by electric resistance partial pressure ADC feet.

Further, the microcomputer power supply circuit is by direct current buck circuits, voltage drop to 3.3V be supplied to it is micro electronmechanical Road.

Further, the output direct current buck reduction voltage circuit of the adjustable optical circuits of DC-DC with dimming function, is according to micro- For the pwm signal that electromechanical road provides to the light modulation foot of U8, U8 adjusts output current according to pwm signal, and PWM count value is started from scratch representative Output current is zero, and PWM count value maximum represents output current and reaches maximum value, to reach the function of adjusting brightness of LED lamps.

Further, the microcomputer circuit is made of 51 kernel microcontroller IC4 of 20 feet, has used two PWM feet Dim signal, an I/O foot detection input state are controlled, an ADC analog-to-digital conversion foot detects secondary voltage.

Further, the isolation constant pressure conversion circuit controls metal-oxide-semiconductor Q2 switches by power management chip U4, through excessively high Frequency power transformer T2 energy transmissions make initial voltage be converted into secondary setting voltage.

Design is scientific and reasonable for intelligent LED control device provided by the utility model, has the following advantages：

1. input state detection circuit directly detects zero firewire, it is not necessarily to rectification and accumulator, circuit framework is simple, whole A circuit only needs 4 elements, at low cost.Using unique matching alternating current 50hz square wave sample modes, continuous three are detected Periodical high level square wave just judges that input AC electricity is normal, prevents false triggering.After input power-off, and need three periods It is all low level and just judges that input AC powers off.

2. initial power-on state-detection to input signal it is correct after, this controller using unique 0.6S that is first delayed mode, After equal controller the operation is stable, microcomputer circuit just controls the output currents of the output adjustable optical circuits of DC-DC in certain time from 0 Maximum is slowly risen to, makes light extraction more stable, accomplishes no stroboscopic.

It is according to human eye vision 3. the unique output current Nai Beixi start up curve of control device and Nai Beixi close curve The adaptable light intensity levels range of vision system of characteristic, people is very wide, and 10 are up to from night vision domain to strong color break-up light¹⁰, but people The gray scale range very little that a certain moment of eye can differentiate, the brightness generated according to luminance adaptation rank are to enter human eye Light intensity logarithmic function, narrow light pulse and its caused brightness in visual persistence are felt, unique resistance to shellfish is designed Western comfortable switch controlling curve.

4. control device primary side accumulator, circuit topology is divided into band PFC type and without power factor school Eurymeric (attached drawing 1).Accumulator uses high-voltage aluminium electrolysis capacitance, energy theorem w=(1/2) c (△ u^2).Needed for output Energy balane formula：According to formula w=UIt, control output DC-DC tunable optical contactor characteristics calculate, and calculate aluminium electroloysis The correspondence capacity of capacitance.

5. circuit secondary voltage value detection circuit 3 carries out unique algorithm adjustment DC-DC circuit according to secondary voltage value Duty ratio accomplishes perfect matching human-eye visual characteristic.

6. unique switch control mode, implementation procedure is divided into four kinds of states：1. initial power-on is 2. normal powered-down 3. secondary Power on 4. secondary closing.This product feature is in state 3. 4. two kinds of situations.It is secondary to power on：The normal powered-down control device of control device Also in comfortable closed state, user reopens power switch and powers on.Secondary closing：Just upper controller for electric consumption also exists control device Comfortable starting state, user are re-closing off power switch.The unique control mode of this control device exists：A. it powers on for two times：It is relaxing The input state circuit of control device detects the upper size of current of user, microcomputer circuit control output at once during suitable closing Circuit stability (is not in rate of change of brightness excessive situation when lamps and lanterns being made to switch, keeps switching more stable in existing output 0.6S Comfortably), just start with reference to the output of Nai Beixi start up curve according on the basis of present output current series；B. two closings： The input state circuit of control device detects that user is powered-down during comfortable startup, microcomputer circuit horse back control output circuit Stablize in existing output 0.6S, just closes curve output closing with reference to Nai Beixi according on the basis of present output current series.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, other drawings may also be obtained based on these drawings：

Fig. 1 is that a kind of intelligent LED control device embodiment 1 of the utility model is intended to；

Fig. 2 is that a kind of intelligent LED control device embodiment 2 of the utility model is intended to；

Fig. 3 is the circuit theory schematic diagram of the utility model embodiment 1；

Fig. 4 is the circuit theory schematic diagram that this uses new embodiment 2；

Fig. 5 is the input AC circuit diagrams of intelligent LED control device；

Fig. 6 is the input state detection circuit schematic diagram of intelligent LED control device；

Fig. 7 is the secondary voltage value detection circuit schematic diagram of intelligent LED control device；

Fig. 8 is the microcomputer circuit schematic diagram of intelligent LED control device；

Fig. 9 is the microcomputer power supply circuit schematic diagram of intelligent LED control device；

Figure 10 is the AC rectification circuit schematic diagrames of intelligent LED control device；

Figure 11 is the primary energy circuit diagram of intelligent LED control device；

Figure 12 is the isolation constant pressure conversion circuit schematic diagram of intelligent LED control device；

Figure 13 is the secondary voltage feedback circuit schematic diagram of intelligent LED control device；

Figure 14 is the output DC-DC tunable optical circuit diagrams of intelligent LED control device；

Figure 15 is the APFC circuit diagrams of intelligent LED control device；

Figure 16 is output current Nai Beixi start up curve figures；

Figure 17 is that output current Nai Beixi closes curve graph；

In attached drawing：1- inputs AC；2- input state detection circuits；3- secondary voltage value detection circuits；4- microcomputer circuits；5- Microcomputer power supply circuit；6-AC rectification circuits；7- primary energy circuits；Constant pressure conversion circuit is isolated in 8-；9- secondary voltages feedback electricity Road；10- exports the adjustable optical circuits of DC-DC；11-APFC circuits.

Specific implementation mode

The utility model is described in detail below in conjunction with attached drawing and specific embodiment, herein showing with the utility model Meaning property embodiment and explanation are used for explaining the utility model, but are not intended to limit the scope of the present invention.

Embodiment 1

As shown in Fig. 1, Fig. 3 and Fig. 5 to Figure 17, a kind of intelligent LED control device, including input AC1, sequentially connected AC Rectification circuit 6, primary energy circuit 7, isolation constant pressure conversion circuit 8, secondary voltage feedback circuit 9, the output adjustable photoelectricity of DC-DC Road 10, and with respectively with secondary voltage feedback circuit 9 and the microcomputer circuits 4 that connects of input AC1, AC rectification circuits 6 with input AC1 connections；Microcomputer power supply circuit 5 and secondary voltage value detection circuit are equipped between microcomputer circuit 4 and secondary voltage feedback circuit 9 9；It inputs AC1 and is equipped with input state detection circuit 2, input state detection circuit 2 is connected to optocoupler by electric resistance partial pressure current limliting U5 input terminals, optocoupler output are connected to the I/O feet of microcomputer circuit 4；Primary energy circuit 7 by big capacity electrolyte capacitor C4~ C8 stores the direct current of input, and after the power-off of input AC electricity, electrolytic capacitor slowly releases the electric energy of storage, allows control Device processed continues to run with a period of time.

Input AC electricity is rectified into direct current by AC rectification circuits 6 by bridge heap BD1.

Secondary voltage feedback circuit 9 passes through optocoupler U1 control isolation constant pressure conversion circuits by CJ431 reference voltage-stabilizing circuits 8 switching frequency makes secondary setting voltage constant.Secondary voltage value detection circuit 3 is connected to microcomputer circuit by electric resistance partial pressure The ADC feet of 4 microcontroller IC4.

Microcomputer power supply circuit 5 drops to 3.3V by direct current buck circuits, voltage and is supplied to microcomputer circuit 4.

Direct current buck reduction voltage circuit of the adjustable optical circuits 10 of DC-DC with dimming function is exported, is provided according to microcomputer circuit 4 Pwm signal to U8 light modulation foot, U8 according to pwm signal adjust output current, PWM count value start from scratch represent output current as Zero, PWM count value maximum represents output current and reaches maximum value, to reach the function of adjusting brightness of LED lamps.

Microcomputer circuit 4 is made of 51 kernel microcontroller IC4 of 20 feet, has used two PWM foot control dim signals, One I/O foot detection input state, an ADC analog-to-digital conversion foot detect secondary voltage.

Constant pressure conversion circuit 8 is isolated, metal-oxide-semiconductor Q2 switches are controlled by power management chip U4, by high frequency transformer T2 energy Amount is transmitted, and initial voltage is made to be converted into secondary setting voltage.

The course of work：

A. for the first time after the power is turned on, after rectifier circuit rectifies, energy storage electrolytic capacitor, electrolytic capacitor both ends electricity are supplied energy to Pressure increases, while the VCC voltage ends of power management chip U4 reach and start voltage, and isolation constant pressure conversion circuit normal work is secondary Step voltage is stablized, and microcomputer power supply circuit is started to work, and provides 3.3V and supplies electricity to microcontroller, after the completion of microcontroller initialization, according to defeated Enter state detection circuit and detect continuous 3 period high level, into delay procedure (0.6S), after the completion of delay, microcontroller into Enter normal power up mode and export specific pwm signal (Nai Beixi start up curve corresponds to the pwm signal series that numerical value obtains), makes DC- DC light adjusting circuit output currents slowly rise to maximum in setting time from zero, and control device keeps this state work always later Make until input state changes.

B. it is normal it is powered-down after, the electrolytic capacitor in primary energy circuit 7 starts to discharge at this time, makes isolation constant pressure conversion circuit Continue to work normally, ensures secondary voltage stable supplying.Input state detection circuit detects continuous 3 periods without high electricity simultaneously It is flat, judge that control device input AC1 is disconnected, microcontroller immediately enters normal powered-down pattern and exports specific pwm signal (Nai Beixi Close curve and correspond to the numerical value that numerical value combination secondary voltage value detection circuit 3 detects and compensate and obtain pwm signal series), 10 output current of DC-DC light adjusting circuits is set to be slowly decreased to zero from maximum in setting time.

C. two times after the power is turned on, input state detection circuit 2 detects continuous 3 period high level, judge input AC electricity Normal microcontroller enters secondary power up mode, and because output current is preferably minimized not yet at this time, LED light is also shining, microcontroller Existing output current 0.6S can be first kept, keeps brightness switching steady, avoids being switched fast electric current and generates that brightness change is excessive to be made one Eye feels under the weather.After delay, maximum is raised slowly to from existing PWM series.

D. after two closings, input state detection circuit 2 detects that continuous 3 periods without high level, judge input AC Electricity shutdown microcontroller is detected by power-off into secondary close pattern because output current reaches maximum value not yet at this time, so Output current needs not continue to increase, but in order to keep brightness switching steady, after first keeping existing output 0.6S, then from existing PWM series slowly decreases up to zero.

Embodiment 2

As shown in Fig. 2, Fig. 4 and Fig. 5 to Figure 17, a kind of intelligent LED control device increases on the basis of embodiment 1 APFC circuits 11, APFC circuits 11 are connect with AC rectification circuits 6, primary energy circuit 7 respectively.

Operation principle

In embodiment 2 in addition to APFC circuits 11, other circuit operation principles are same as Example 1.

First the DC voltage after rectifier bridge stack rectification is upgraded to 400V is given to accumulator using phase to APFC circuits 11 again Increase storage energy, and power factor correcting in the case of with electrolytic capacitor.This circuit is controlled by PFC chips U2 Metal-oxide-semiconductor Q1 switches, by high frequency transformer T2 energy transmissions, make initial voltage rise to 400V direct currents.

The course of work：

The course of work switchs control effect reaching same comfortable in the same manner as in Example 1, only, energy storage needed for embodiment 2 Electrolytic capacitor is less, and after PFC (i.e. power factor is high), and the active power higher of control device avoids Waste national grid resource.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection domain within.

Claims (9)

1. a kind of intelligent LED control device, including input AC, sequentially connected AC rectification circuits, primary energy circuit, isolation are permanent Voltage conversion circuit, secondary voltage feedback circuit, output the adjustable optical circuits of DC-DC, and with respectively with secondary voltage feedback circuit The microcomputer circuit connected with input AC；It is characterized in that：

Microcomputer power supply circuit and secondary voltage value detection circuit are equipped between the microcomputer circuit and secondary voltage feedback circuit；Institute It states input AC and is equipped with input state detection circuit, input state detection circuit is connected to optocoupler U5 by electric resistance partial pressure current limliting Input terminal, optocoupler output are connected to the I/O feet of microcomputer circuit；The primary energy circuit by big capacity electrolyte capacitor C4~ C8 stores the direct current of input, and after the power-off of input AC electricity, electrolytic capacitor slowly releases the electric energy of storage, allows control Device processed continues to run with a period of time.

2. intelligent LED control device according to claim 1, it is characterised in that：

Be additionally provided with APFC circuits between the AC rectification circuits and primary energy circuit, APFC circuits respectively with AC rectification circuits, Primary energy circuit connects.

3. intelligent LED control device according to claim 1 or 2, it is characterised in that：

Input AC electricity is rectified into direct current by the AC rectification circuits by bridge heap BD1.

4. intelligent LED control device according to claim 1 or 2, it is characterised in that：

The secondary voltage feedback circuit passes through optocoupler U1 control isolation constant pressure conversion circuits by CJ431 reference voltage-stabilizing circuits Switching frequency, make secondary setting voltage constant.

5. intelligent LED control device according to claim 1 or 2, it is characterised in that：

The secondary voltage value detection circuit is connected to the ADC feet of the microcontroller IC4 of microcomputer circuit by electric resistance partial pressure.

6. intelligent LED control device according to claim 1 or 2, it is characterised in that：

The microcomputer power supply circuit drops to 3.3V by direct current buck circuits, voltage and is supplied to microcomputer circuit.

7. intelligent LED control device according to claim 1 or 2, it is characterised in that：

The output direct current buck reduction voltage circuit of the adjustable optical circuits of DC-DC with dimming function, provides according to microcomputer circuit Pwm signal to U8 light modulation foot, U8 according to pwm signal adjust output current, PWM count value start from scratch represent output current as Zero, PWM count value maximum represents output current and reaches maximum value, to reach the function of adjusting brightness of LED lamps.

8. intelligent LED control device according to claim 1 or 2, it is characterised in that：

The microcomputer circuit is made of 51 kernel microcontroller IC4 of 20 feet, has used two PWM foot control dim signals, One I/O foot detection input state, an ADC analog-to-digital conversion foot detect secondary voltage.

9. intelligent LED control device according to claim 1 or 2, it is characterised in that：

The isolation constant pressure conversion circuit controls metal-oxide-semiconductor Q2 switches by power management chip U4, by high frequency transformer T2 energy Amount is transmitted, and initial voltage is made to be converted into secondary setting voltage.