CN101196276A - Program controlled mixed color LED light projector - Google Patents
Program controlled mixed color LED light projector Download PDFInfo
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- CN101196276A CN101196276A CNA2007100303502A CN200710030350A CN101196276A CN 101196276 A CN101196276 A CN 101196276A CN A2007100303502 A CNA2007100303502 A CN A2007100303502A CN 200710030350 A CN200710030350 A CN 200710030350A CN 101196276 A CN101196276 A CN 101196276A
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- led light
- led lamp
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- light projector
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Abstract
A programmed control mixing color LED spot light is provided, which comprises a controller and at least two LED light cluster among three LED light cluster colored in red, green and blue. The controller is provided with a monoboard computer, an external communication slot and LED light cluster drive circuit of corresponding quantity; wherein, a procedure and data storage is arranged inside and/or outside the monoboard computer. The drive circuit uses PWM pulse width control constant current out switch power supply; the procedure and data storage is provided with control modules capable of enabling control interfaces to output frequency and pulse width modulation signals with adjustable duty ratio to the drive circuit controlled by set procedure to change the luminosity, color and frequency as the procedure. Together with the temperature monitor and by controlling the color mixing and frequency variation of PWM pulse width constant current between 0 and 255 grade for the LED lighting cluster in three colors as red, green and blue, the invention enables the LED lighting cluster to work under best and highest status, and has the advantages of small bulk, high luminosity, energy-saving, long service life, saturated and bright color.
Description
Technical field
The present invention relates to the LED lighting technical field, particularly a kind of program controlled mixed color LED light projector.
Background technology
The LED Projecting Lamp has the advantages that volume is little, power is little, the life-span is long, color is saturated and do not have ultraviolet light.Along with the development of LED technology, LED has obtained widely to use, especially for: 1) directly send the equipment of light to the beholder, as: the backlight of lcd screen, indicator lamp, LED giant-screen etc.; 2) be mapped to another object or body surface with the light source of LED and equipment that viewed person sees, as: Projecting Lamp, or say floodlight, shot-light.Yet, owing to there is the high problem of unit brightness cost, the LED Projecting Lamp is not also applied at present well, seen product on the market, mostly be to utilize simple electronic circuit to increase its luminous intensity, in the hope of solving the high problem of brightness cost by big electric current.So, though by strengthening the way of LED operating current, the due life-span of LED has been shortened in the of short duration raising brightness of energy greatly, has increased the use cost of product, has also limited market sale.In addition, it is bigger that we find that the brightness of LED is influenced by its operating temperature, and temperature is high more, and brightness is low more.
Summary of the invention
Task of the present invention be to design a kind of can be program control under computer chip control, the LED Projecting Lamp of constant current high brightness driving LED colour mixture light projector.
Technical scheme of the present invention is as follows:
A kind of program controlled mixed color LED light projector, comprise controller and red, green, at least two LED lamp groups in blue three LED lamp groups, on controller, be provided with one-chip computer, the LED lamp group drive circuit of external communication interface and respective numbers, in one-chip computer and/or outside be provided with program and data storage, it is characterized in that being provided with the output control interface that is used for controlling described LED lamp group drive circuit corresponding to LED lamp group on the described one-chip computer, drive circuit is a PWM pulse-width controlled constant current output Switching Power Supply, its output is corresponding with described LED lamp group respectively to link to each other, thus be provided with in program and the data storage can make control interface under setting program control to the drive circuit output frequency with account for control makes LED lamp group than adjustable pulse-width signal luminosity, color, the control module that the frequency follow procedure changes.
More specifically measure is as described below:
Described LED lamp group has three, is made of an above red, green, blue look LED respectively; Described pulse-width signal makes each LED lamp group export specific color and brightness under programme-control according to the program output color of setting and changing in 0 to 255 grade of dutycycle of brightness requirement in advance.
In described LED lamp group, be provided with temperature sensor, be attached thereto, on controller, also be provided with the monitoring temperature circuit.
Described PWM pulse-width controlled constant current output Switching Power Supply is a kind of PWM pulse-width controlled constant current switch power supply that constitutes based on pulsewidth modulated intergrated circuit, FET and peripheral circuit.
The output control interface of program controlled mixed color LED light projector of the present invention by built-in one-chip computer is under programme-control, in conjunction with monitoring temperature, red, green, blue three-color LED light group is carried out in 0 to 255 grade of PWM pulsewidth constant current colour mixture, VFC, make each LED lamp group be operated in the best, highlighted state, have that volume is little, brightness is high, energy-conservation, the life-span is long, color is saturated, a lucuriant in design advantage.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is the schematic diagram of monitoring temperature circuit among Fig. 1.
Fig. 3 is the circuit theory diagrams of PWM pulse-width controlled constant current output Switching Power Supply among Fig. 1.
The specific embodiment
A kind of program controlled mixed color LED light projector comprises system power supply 1, controller 2 and three LED lamps of red, green, blue group LEDR, LEDG, LEDB.
On controller 2, be provided with one-chip computer 21, the external LED lamp group drive circuit 23,24,25 of communication interface 26,27 and respective numbers, in one-chip computer and/or outside be provided with program and data storage 22.Be provided with output control interface R, G, the B that is used for controlling LED lamp group drive circuit corresponding to LED lamp group on the one-chip computer.On controller, also be provided with and be used for LCD display 4 and the keyboard 5 that parameter is provided with.
The drive circuit of LED lamp group is a PWM pulse-width controlled constant current output Switching Power Supply 6, it is a kind of PWM pulse-width controlled constant current switch power supply that constitutes based on pulsewidth modulated intergrated circuit, FET and peripheral circuit, its output is corresponding with LED lamp group separately respectively to link to each other, thus be provided with in program and the data storage can make control interface under setting program control to the drive circuit output frequency with account for the control module that control changes luminosity, color, the frequency follow procedure of LED lamp group than adjustable pulse-width signal.Pulse-width signal can be changed in 0 to 255 grade by program setting, makes each LED lamp group colour mixture under setting program control.
Externally communication interface 26,27 is the DMX512 interface, and one-chip computer is by this interface and external upper numerical control device or the master/slave connection of the next numerical control device (as: upper LED Projecting Lamp, the next LED Projecting Lamp, or host computer).
In LED lamp group, be provided with temperature sensor 3, be attached thereto, on controller, also be provided with monitoring temperature circuit 28.Monitoring temperature circuit 28 is a kind of comparators based on LM358 operational amplifier and dividing potential drop reference circuit.One-chip computer carries out power regulation according to the temperature of LED lamp group to it, can effectively control the optimum Working of LED lamp group.
Pulsewidth modulated intergrated circuit can be selected UC3842 or UC3843, FET can be selected IRF244N, as shown in Figure 3, the basic principle of PWM pulse-width controlled constant current output Switching Power Supply is: after 1, one-chip computer changes into the PWM pulse-width signal with the color grey scale signal, export to the input port IN that Switching Power Supply is exported in the constant current of PWM pulse-width controlled, the duty of control pulsewidth modulated intergrated circuit UC3842 (or UC3843) through output control interface R, G, B; 2, after the UC3842 conversion, by its 6 pin output PWM drive high-power FET IRF244N; 3, red, green, blue three-color LED light group LEDR, LEDG, LEDB respectively with linking to each other with the LED-output separately at LED+; 4, resistance R 20 is current sampling resistors, and sampled signal is after triode T1 amplifies, from the 2 pin input of UC3842; 5, resistance R 18 is a voltage sample resistance, and sampled signal is from the 3 pin input of UC3842; 6, UC3842 reaches the purpose of constant current control by current feedback and voltage feedback signal.More detailed operation principle please refer to the relevant technical manuals of company such as MOTOROLA.
Claims (8)
1. program controlled mixed color LED light projector, comprise controller and red, green, at least two LED lamp groups in blue three LED lamp groups, on controller, be provided with one-chip computer, the LED lamp group drive circuit of external communication interface and respective numbers, in one-chip computer and/or outside be provided with program and data storage, it is characterized in that being provided with the output control interface that is used for controlling described LED lamp group drive circuit corresponding to LED lamp group on the described one-chip computer, drive circuit is a PWM pulse-width controlled constant current output Switching Power Supply, its output is corresponding with described LED lamp group respectively to link to each other, thus be provided with in program and the data storage can make control interface under setting program control to the drive circuit output frequency with account for control makes LED lamp group than adjustable pulse-width signal luminosity, color, the control module that the frequency follow procedure changes.
2. according to the described program controlled mixed color LED light projector of claim 1, it is characterized in that described LED lamp group has three, constitute by an above red, green, blue look LED respectively; Described pulse-width signal makes each LED lamp group export specific color and brightness under programme-control according to the program output color of setting and changing in 0 to 255 grade of dutycycle of brightness requirement in advance.
3. according to the described program controlled mixed color LED light projector of claim 1, it is characterized in that being that described communication interface is the DMX512 interface, described one-chip computer by this interface with external upper numerical control device or the next numerical control device is master/slave is connected.
4. according to claim 1,2 or 3 described program controlled mixed color LED light projectors, it is characterized in that in described LED lamp group, being provided with temperature sensor, be attached thereto, on controller, also be provided with the monitoring temperature circuit.
5. according to the described program controlled mixed color LED light projector of claim 4, it is characterized in that described PWM pulse-width controlled constant current output Switching Power Supply is a kind of PWM pulse-width controlled constant current switch power supply that constitutes based on pulsewidth modulated intergrated circuit, FET and peripheral circuit.
6. according to the described program controlled mixed color LED light projector of claim 4, it is characterized in that described monitoring temperature circuit is a kind of comparator based on LM358 operational amplifier and dividing potential drop reference circuit.
7. according to the described program controlled mixed color LED light projector of claim 5, the model that it is characterized in that described pulsewidth modulated intergrated circuit is UC3842 or UC3843, and the model of described FET is IRF244N.
8. according to the described program controlled mixed color LED light projector of claim 1, it is characterized in that on described controller, also being provided with the LCD display and the keyboard that are used for the parameter setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100303502A CN101196276A (en) | 2007-09-21 | 2007-09-21 | Program controlled mixed color LED light projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100303502A CN101196276A (en) | 2007-09-21 | 2007-09-21 | Program controlled mixed color LED light projector |
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| Publication Number | Publication Date |
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| CN101196276A true CN101196276A (en) | 2008-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007100303502A Pending CN101196276A (en) | 2007-09-21 | 2007-09-21 | Program controlled mixed color LED light projector |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446396A (en) * | 2008-11-20 | 2009-06-03 | 北京巨数数字技术开发有限公司 | LED street lamp |
| CN101925226A (en) * | 2008-09-28 | 2010-12-22 | 东莞市高鑫机电科技服务有限公司 | Regulation and control method of program control lamp source |
| WO2011014986A1 (en) * | 2009-08-04 | 2011-02-10 | Wen Chiawen | Light projection device for exhibit |
| CN102421230A (en) * | 2011-09-15 | 2012-04-18 | 四川新力光源有限公司 | Color adjusting driver for LED (Light-Emitting Diode) lamp |
| CN101925213B (en) * | 2009-06-12 | 2013-04-10 | 复旦大学 | Color drift-free LED linear dimming system based on PWM |
| CN103327671A (en) * | 2012-03-19 | 2013-09-25 | 黄如金 | PCB of LED lamp |
| CN103337953A (en) * | 2013-06-20 | 2013-10-02 | 张家港市华为电子有限公司 | Switching power supply equipment for PWM control mode |
| CN103547048A (en) * | 2013-11-14 | 2014-01-29 | 东莞欧其照明有限公司 | Lamp control system and method based on power line |
| CN103987148A (en) * | 2013-02-08 | 2014-08-13 | 东林科技股份有限公司 | Dimmable light-emitting-diode illumination system, and driving device and driving method thereof |
| CN105024568A (en) * | 2015-08-05 | 2015-11-04 | 宁波赛耐比光电科技股份有限公司 | Frequency conversion and constant current BUCK circuit |
| CN106714397A (en) * | 2015-08-04 | 2017-05-24 | 北京星光影视设备科技股份有限公司 | Precise color mixture driving control system and method of LED lamp |
-
2007
- 2007-09-21 CN CNA2007100303502A patent/CN101196276A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925226A (en) * | 2008-09-28 | 2010-12-22 | 东莞市高鑫机电科技服务有限公司 | Regulation and control method of program control lamp source |
| CN101925226B (en) * | 2008-09-28 | 2014-06-18 | 东莞市高鑫机电科技服务有限公司 | Regulation and control method of program control lamp source |
| CN101446396A (en) * | 2008-11-20 | 2009-06-03 | 北京巨数数字技术开发有限公司 | LED street lamp |
| CN101925213B (en) * | 2009-06-12 | 2013-04-10 | 复旦大学 | Color drift-free LED linear dimming system based on PWM |
| WO2011014986A1 (en) * | 2009-08-04 | 2011-02-10 | Wen Chiawen | Light projection device for exhibit |
| CN102421230A (en) * | 2011-09-15 | 2012-04-18 | 四川新力光源有限公司 | Color adjusting driver for LED (Light-Emitting Diode) lamp |
| CN102421230B (en) * | 2011-09-15 | 2015-08-05 | 四川新力光源股份有限公司 | A kind of LED color adjustment driver |
| CN104936350A (en) * | 2011-09-15 | 2015-09-23 | 四川新力光源股份有限公司 | Dimming method of LED light-emitting device |
| CN104936350B (en) * | 2011-09-15 | 2017-12-12 | 四川新力光源股份有限公司 | A kind of light-dimming method of LED light emission device |
| CN103327671A (en) * | 2012-03-19 | 2013-09-25 | 黄如金 | PCB of LED lamp |
| CN103987148A (en) * | 2013-02-08 | 2014-08-13 | 东林科技股份有限公司 | Dimmable light-emitting-diode illumination system, and driving device and driving method thereof |
| WO2014121660A1 (en) * | 2013-02-08 | 2014-08-14 | 东林科技股份有限公司 | Dimmable light-emitting diode illumination system, driving apparatus and driving method thereof |
| CN103337953A (en) * | 2013-06-20 | 2013-10-02 | 张家港市华为电子有限公司 | Switching power supply equipment for PWM control mode |
| CN103547048A (en) * | 2013-11-14 | 2014-01-29 | 东莞欧其照明有限公司 | Lamp control system and method based on power line |
| CN106714397A (en) * | 2015-08-04 | 2017-05-24 | 北京星光影视设备科技股份有限公司 | Precise color mixture driving control system and method of LED lamp |
| CN105024568A (en) * | 2015-08-05 | 2015-11-04 | 宁波赛耐比光电科技股份有限公司 | Frequency conversion and constant current BUCK circuit |
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Application publication date: 20080611 |