CN202183903U

CN202183903U - Light modulator

Info

Publication number: CN202183903U
Application number: CN2011203247949U
Authority: CN
Inventors: 王其明; 林万炯
Original assignee: 林万炯
Current assignee: Ningbo Self Electronics Co Ltd
Priority date: 2011-08-25
Filing date: 2011-08-25
Publication date: 2012-04-04
Anticipated expiration: 2021-08-25

Abstract

The utility model relates to a light modulator which comprises a light modulation control circuit, wherein the output terminal of the light modulation control circuit is connected with an external load. The light modulator is characterized by also comprising a central processor which is used for detecting the frequency value of an external connection input power supply and outputting different control signals to the light modulation control circuit so as to control the luminance value of the external load; the external connection input power supply is connected with a voltage reduction circuit and then is connected with the power supply input terminal of a central controller for providing power to the central processor; and the external connection input power supply is connected with the central processor via a in-phase detection circuit so that the frequency value of the external connection input power supply is detected by the central processor. Compared with the prior art, the light modulator has the advantages that the light modulator of the utility model is a full-voltage back phase shift light modulator which is suitable for power grids of all countries in the world; the power grid frequency can be detected, the work mode is switched automatically, and the load range is from 1W to full power; and the light modulator has a wide light modulation range from 3% to 99%.

Description

A kind of dimmer

Technical field

The utility model relates to a kind of dimmer.

Background technology

The input voltage of common dimmer can only satisfy a certain section voltage (like 220-240V), and the difference of mains frequency also can make the dimming behavior variation.Load can not be too little, and dimming scope is transferred less than 99% (being generally 70-80%).

The utility model content

The utility model technical problem to be solved be to above-mentioned prior art provide electrical network that a kind of ability is fit to global various countries, and can the detection of grid frequency, the dimmer of dimming scope broad.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this dimmer; The adjusting control circuit that comprises output termination external loading; It is characterized in that: thus also comprise and can detect external input supply frequency value, and can export different control signals are controlled the external loading brightness value to said adjusting control circuit central processing unit; Thereby external input power supply connects the power input that inserts said central controller behind the reduction voltage circuit gives said central processing unit power supply, thereby external input power supply links to each other with said central processing unit through phase detecting circuit together and makes said central processing unit detect external input supply frequency value.

As improvement, the dimmer that the utility model provides also comprises current foldback circuit, and the input of this current foldback circuit links to each other with said adjusting control circuit, and the output of said current foldback circuit links to each other with said central processing unit.

Preferably; Said adjusting control circuit comprises a switching tube; Said current foldback circuit comprises an optocoupler, and the source electrode of switching tube links to each other with the input of optocoupler through a resistance in the said adjusting control circuit, and the output of optocoupler links to each other with said central processing unit overcurrent protection input; Said central processing unit is according to the over-current signal of overcurrent protection input input, thereby the output control signal turn-offs said external loading for said adjusting control circuit.

Improve, the dimmer that the utility model provides also comprises touch control circuit again, and the output of this touch control circuit links to each other with said central processing unit.

Improve, the dimmer that the utility model provides also comprises a mechanical switch again, and first end of this mechanical switch links to each other with said reduction voltage circuit output after connecting an electric capacity, and second end of said mechanical switch links to each other with said touch control circuit.

Improve, the dimmer that the utility model provides comprises that also dimming scope is provided with circuit again, and the output that this dimming scope is provided with circuit links to each other with said central processing unit.

Improve again; The dimmer that the utility model provides also comprises full bridge rectifier; The input of this full bridge rectifier links to each other with said external input power supply, gives said adjusting control circuit power supply thereby the output of this full bridge rectifier links to each other with said adjusting control circuit

Compared with prior art, the advantage of the utility model is: the dimmer that the utility model provides is a phase shift dimmer behind the full voltage, is fit to the electrical network of global various countries, and it can detection of grid frequency, transformation working pattern automatically.Loading range can be from 1W to the full power.Suitable load has: electronic transformer, dimmable energy-saving lamp, dimmable fluorescent lamp, Dimmable LED driver.The dimming scope broad can transfer to 99% from 3%.For satisfying the unequally loaded dimming scope, product is provided with dimming scope circuit is set.The product brightness adjustment control is for touching the input of input or switch.Product has overload protection function and overheat protector function.The product quiescent dissipation is low.

Description of drawings

Fig. 1 is the module frame chart of dimmer among the utility model embodiment.

Fig. 2 is the circuit theory diagrams of dimmer among the utility model embodiment.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Dimmer as shown in Figure 1; It comprises reduction voltage circuit 1, central processing unit 2, adjusting control circuit 3, with phase detecting circuit 4, full bridge rectifier 5, touch control circuit 6, dimming scope circuit 7, current foldback circuit 8, mechanical switch 9 and touch-screen 10 is set; Wherein the input of reduction voltage circuit 1 links to each other with external input power supply; External input power source voltage can be from 100V to 240V; Frequency can be 50HZ; Also can be 60HZ; Thereby the output of reduction voltage circuit 1 inserts the power input of central controller 2 gives central processing unit 2 power supplies, thereby external in addition input power supply makes said central processing unit 2 can detect external input supply frequency value through linking to each other with said central processing unit 2 with phase detecting circuit 4, and the output of central processing unit 2 links to each other with adjusting control circuit 3; The output termination external modulation tool load 11 of adjusting control circuit 3, thus this central processing unit 2 can detect external input supply frequency value, also can export different control signals to said adjusting control circuit control external loading brightness value; The output of touch control circuit 6 links to each other with said central processing unit 2, makes that the brightness of external load can be through touching control; First end of mechanical switch 9 links to each other with said reduction voltage circuit 1 output after connecting an electric capacity, and second end of said mechanical switch 9 links to each other with said touch control circuit 6, makes that the brightness of external load also can be through mechanical switch control; The output that dimming scope is provided with circuit links to each other with said central processing unit, and the dimmer that makes the utility model provide can satisfy the unequally loaded dimming scope; The input of full bridge rectifier 5 links to each other with said external input power supply, gives said adjusting control circuit 3 power supplies thereby the output of this full bridge rectifier 5 links to each other with said adjusting control circuit 3; Current foldback circuit 8 inputs link to each other with said adjusting control circuit 3, and the output of said current foldback circuit 8 links to each other with said central processing unit 2.

Reduction voltage circuit 1 adopts custom circuit; Reduction voltage circuit 1 comprises second capacitor C 2, the 3rd diode D3, the 5th diode D5, the 6th capacitor C 6, the 7th resistance R 7, the tenth resistance R the 10, the 21 resistance R the 21, the 24 resistance R 24 in the present embodiment; Referring to shown in Figure 2; Its composition RC reduction voltage circuit links to each other with the power supply input pin of central processing unit 2 and offers the 5V power supply that central processing unit 2 uses; The 5th resistance, the 6th resistance, the 6th diode are formed the zero passage detection pin that inserts central processing units 2 with phase detecting circuit 4, and when external input power supply is positive phase time, the zero passage detection pin of central processing unit 2 is a 5V voltage; When more external input power supply was anti-phase, the zero passage detection pin of central processing unit 2 was-0.7V voltage.

In the present embodiment, it is the processor of single chip computer of 12F675 that central processing unit 2 adopts model, referring to shown in Figure 2; Its 1st pin is the power supply input pin, and the 2nd pin links to each other with the output of touch control circuit 6 for the control input pin, and the 3rd pin is the zero passage detection pin and link to each other with phase detecting circuit; The 7th pin is that light modulation is provided with pin; With dimming scope circuit is set and links to each other, the 6th pin is an output pin, is used to export to pwm signal and gives adjusting control circuit; The 5th pin is the overcurrent protection pin, links to each other with the output of current foldback circuit.First end of the 7th capacitor C 7 links to each other with the 5th pin of single-chip microcomputer, the second end ground connection of the 7th capacitor C 7, and the effect of the 7th capacitor C 7 is delay protections when making the circuit start, if the too big short-circuit protection response of C7 capacity is just slow, easy burn-out Q1 during short circuit; If the too little short-circuit protection of C7 capacity is too fast, because of making circuit, the little meeting of load cold-state resistance gets into the overload protection state during start, be difficult for start.

Adjusting control circuit 3 adopts custom circuit; Comprise the 14 resistance R 14, optocoupler N2, first resistance R 1, first capacitor C 1, the second diode D2, the first diode D1, the 18 resistance R the 18, the 19 resistance R the 19, the 25 resistance R the 25, the 12 resistance R the 12, the 15 resistance R 15 and FET Q1 in the present embodiment, referring to shown in Figure 2.First resistance R the 1, the 18 resistance R the 18, the 19 resistance R the 19, the 25 resistance R 25, the first diode D1, the second diode D2, first capacitor C 1 are formed second group of power supply; Magnitude of voltage is about 15V; The 14 resistance R 14, optocoupler N2, the 15 resistance R 15 are formed isolated drive circuits; Phase place is identical, and FET Q1 is a switching tube, is the Primary Component of low voltage control high-voltage switch gear.

Full bridge rectifier 5 also adopts custom circuit, and it comprises four diodes, i.e. the 4th diode D4, the 7th diode D7, the 8th diode D8, the 9th diode D9 are referring to shown in Figure 2.

And fuse F1 and temperature switch F H1, the 5th capacitor C 5, piezo-resistance F V1 are connected on the external input power supply, are used to protect that voltage is stable uses.

Touch control circuit 6 also adopts custom circuit, and in the present embodiment, it comprises that model is that IQS127 touch chip and peripheral circuit are formed, and dimmer has two kinds of control models in the present embodiment: i.e. outside connected switch control or touch control, also can two kinds of patterns use simultaneously.Touch signal is imported through 6 pin (touch input) of the 4th capacitor C the 4, the 12 capacitor C 12 to touch chip IQS127 from 2 pin of interface CN3; Before input, decay in order to reduce touch sensitivity (but because of touch chip IQS127 noncontact induction control through the 13 capacitor C 13; This product does not require so high sensitivity), simultaneously be used for antistatic with the 13 capacitor C 13 and a piezo-resistance F V2.When external mechanical switch is controlled light modulation, touch input and be connected with the 5V power supply through outside connected switch, the 3rd capacitor C 3.After mechanical switch is connected, simulation human body touch control light modulation.1 pin became low level by original high level after touch chip IQS127S received effective touch signal.Low level pulsewidth equates with the duration that touches input, but when the touch time greater than 20 seconds about after, touch chip IQS127S just stops corresponding, output (1 pin) just becomes high level, after decontroling again touch just can come into force.

Dimming scope is provided with circuit 7 and also adopts custom circuit; In the present embodiment; It comprises biswitch S1, the 4th resistance R the 4, the 22 resistance R the 22, the 23 resistance R 23, the 3rd resistance R 3, and referring to shown in Figure 2, biswitch S1 has 4 kinds of states; Be respectively 00 (closing), 01 (open the pass), 10 (switches), 11 (opening), make single-chip microcomputer the 7th pin form 4 kinds of different potential and make AD input usefulness.The minimum light modulation degree of dimmer is changed, cooperate the different dimming scopes of different loads needs.

Current foldback circuit 8 comprises optocoupler N3, the 13 resistance R the 13, the 17 resistance R 17 and second resistance R 2; The source electrode of FET Q1 connects the 13 resistance R 13 and links to each other with the input of optocoupler N3 in the said adjusting control circuit; The output of optocoupler N3 connects second resistance R, 2 backs and links to each other with the overcurrent protection input of single-chip microcomputer; Single-chip microcomputer is according to the over-current signal of overcurrent protection input input, thereby the output control signal turn-offs said external loading for said adjusting control circuit.After electric current that field effect pipe Q1 flows through surpassed 7A, the pressure drop of the 17 resistance R 17 resistance will surpass 1V, makes optocoupler N3 conducting, and the current potential of 5 pin of single-chip microcomputer just descends immediately, after single-chip microcomputer is handled, closes Q1 load is cut off the power supply.

Claims

1. dimmer; The adjusting control circuit that comprises output termination external loading; It is characterized in that: thus also comprise and can detect external input supply frequency value, and can export different control signals are controlled the external loading brightness value to said adjusting control circuit central processing unit; Thereby external input power supply connects the power input that inserts said central controller behind the reduction voltage circuit gives said central processing unit power supply, thereby external input power supply links to each other with said central processing unit through phase detecting circuit together and makes said central processing unit detect external input supply frequency value.

2. dimmer according to claim 1 is characterized in that: also comprise current foldback circuit, the input of this current foldback circuit links to each other with said adjusting control circuit, and the output of said current foldback circuit links to each other with said central processing unit.

3. dimmer according to claim 2; It is characterized in that: said adjusting control circuit comprises a switching tube; Said current foldback circuit comprises an optocoupler; The source electrode of switching tube links to each other with the input of optocoupler through a resistance in the said adjusting control circuit; The output of optocoupler links to each other with said central processing unit overcurrent protection input after also connecting a resistance, and said central processing unit is according to the over-current signal of overcurrent protection input input, thereby the output control signal turn-offs said external loading for said adjusting control circuit.

4. dimmer according to claim 1 is characterized in that: also comprise touch control circuit, the output of this touch control circuit links to each other with said central processing unit.

5. dimmer according to claim 4 is characterized in that: also comprise a mechanical switch, first end of this mechanical switch links to each other with said reduction voltage circuit output after connecting an electric capacity, and second end of said mechanical switch links to each other with said touch control circuit.

6. dimmer according to claim 1 is characterized in that: comprise that also dimming scope is provided with circuit, the output that this dimming scope is provided with circuit links to each other with said central processing unit.

7. dimmer according to claim 1; It is characterized in that: also comprise full bridge rectifier; The input of this full bridge rectifier links to each other with said external input power supply, gives said adjusting control circuit power supply thereby the output of this full bridge rectifier links to each other with said adjusting control circuit.