CN204291499U - A kind of LED based on STC single-chip microcomputer drives and light modulating device - Google Patents
A kind of LED based on STC single-chip microcomputer drives and light modulating device Download PDFInfo
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- CN204291499U CN204291499U CN201420787262.2U CN201420787262U CN204291499U CN 204291499 U CN204291499 U CN 204291499U CN 201420787262 U CN201420787262 U CN 201420787262U CN 204291499 U CN204291499 U CN 204291499U
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Abstract
The utility model discloses a kind of LED based on STC single-chip microcomputer to drive and light modulating device, it is characterized in that: described device comprises power module, LED drive module, luminance adjustment module, alarm module and control module; Power module is responsible for powering to LED drive module, luminance adjustment module, alarm module and control module; LED drive module comprises LED drive chip and switching device, and the control signal exported by control module carrys out driving LED luminescence; Luminance adjustment module comprises luminance sensor and brightness regulating circuit, and the ambient brightness signal collected is sent to control module, and regulates the brightness of LED according to the feedback signal of control module; Alarm module is made up of audible-visual annunciator, starts sound and light alarm by control module; Control module comprises microprocessor and sample circuit, and output signal controls LED drive module, environmentally intensity control luminance adjustment module, controls alarm module action by sampling LED operating current size.The utility model provides a kind of LED based on STC single-chip microcomputer and drives and light modulating device, can realize with an automatic light meter and hand-operating light, and dimming scope is wide, and light modulation precision is high.
Description
Technical field
The utility model belongs to lighting field, relates to a kind of LED based on STC single-chip microcomputer and drives and light modulating device.
Background technology
Look back the illumination history of the mankind, from fluorescent lamp, mercury lamp, high-low pressure sodium vapor lamp, metal halide lamp, compact fluorescent lamp, high-frequency electrodeless fluorescent lamp to new light sources such as microwave sulfur lamps, all constantly develop because of self-defect.The very long phase of history of the mankind accompanied by incandescent lamp, but it has geneogenous defect, and the incandescent lamp heating loss as thermal light source is large, and luminous efficiency is low.Advocating the New Times of energy-saving and emission-reduction, the development of appearance to lighting technology of new green environment protection light source led has epoch-making meaning.LED light source belongs to cold light source, and volume is little, lightweight, and dazzle is little, radiationless, and operating voltage is low, long service life, and glow color can reach 256 kinds.The LED of high brightness is due to the development in manufacturing process, device layout and packaging technology three, and the performance of LED is improving constantly.At present, LED has been widely used in the general illumination market such as LED display, backlight, auto lamp illumination, signal lamp, indoor decoration lamp, Landscape Lighting.
The core of LED illumination technology is the design of drive circuit, and traditional power supply can not be powered directly to LED.LED is the device of current drives, and its voltage-current characteristic determines it and can only adopt constant current drive mode, and all needs to have light modulation effect in the application of LED, and traditional simulation dimming mode there will be LED color skew.The utility model have employed a constant-current driven chip, and simply, light modulation is without color displacement, and dimming scope is wide, and light modulation precision is high, has hand-operating light and two kinds of dimming modes with an automatic light meter for driving and light adjusting circuit.
Utility model content
Technical problem to be solved in the utility model proposes a kind of new driving and dimming mode for existing LED type of drive.
In order to achieve the above object, the technical solution adopted in the utility model is:
LED based on STC single-chip microcomputer drives and a light modulating device, it is characterized in that: described device comprises power module, LED drive module, luminance adjustment module, alarm module and control module; Described power module is responsible for powering to LED drive module, luminance adjustment module, alarm module and control module; Described LED drive module comprises LED drive chip and switching device, and the control signal exported by control module carrys out driving LED luminescence; Described luminance adjustment module comprises luminance sensor and brightness regulating circuit, and the ambient brightness signal collected is sent to control module, and regulates the brightness of LED according to the feedback signal of control module; Described alarm module is made up of audible-visual annunciator, starts sound and light alarm by control module; Described control module comprises microprocessor and sample circuit, and output signal controls LED drive module, environmentally intensity control luminance adjustment module, controls alarm module action by sampling LED operating current size.Described LED drive module adopts the LED constant current driving chip with light modulation Enable Pin, adopts control module to produce PWM ripple, by the brightness regulating PWM ripple duty ratio to control LED.Described luminance adjustment module can realize with an automatic light meter and hand-operating light, with an automatic light meterly pass to control module by luminance sensor real-time sampling ambient brightness value, regulated by control module thus export suitable brightness value, and hand-operating light can realize the gamut light modulation of 0-100%.Described control module can detect the magnitude of voltage on sampling resistor in real time, if there is over-current phenomenon avoidance, control module can stop exporting PWM ripple to LED drive module, thus turns off LED, and sends warning message.
LED based on STC single-chip microcomputer drives and a light modulating device, it is characterized in that: described power module adopts the Switching Power Supply of 12V, by the step-down of 220V commercial power rectification, obtains 12V DC, then obtains 5V DC and 9V DC respectively by voltage stabilizing chip L7805 and L7809.
A kind of LED based on STC single-chip microcomputer drives and light modulating device, it is characterized in that: described LED drive module adopts great power LED constant-current driven chip DD311 as driving chip, the selection of input pickup resistance determines the size of input current, constrained input current ratio is 1:100, the LED of output can select to work alone or work simultaneously by switch, chip is furnished with Enable Pin, the duty ratio controlling the PWM ripple of Enable Pin just can complete the object of light modulation, dimming scope is 0%-100%, and this device realizes gamut light modulation by adjusting knob.
A kind of LED based on STC single-chip microcomputer drives and light modulating device, it is characterized in that: described control module adopts STC12C5410AD single-chip microcomputer to produce PWM ripple to control the Enable Pin of LED drive chip, by the brightness regulating the duty ratio of PWM ripple to control light modulation, the brightness that full electric current can reach 50% is applied when 50% duty ratio, dimming mode is simple, user can select hand-operating light or with an automatic light meter by switch, control module also can carry out real-time AD sampling to the sampling resistor that DD311 inputs termination, just stops PWM producing if there is over-current phenomenon avoidance and starts warning.
A kind of LED based on STC single-chip microcomputer drives and light modulating device, it is characterized in that: described luminance adjustment module adopts brightness transducer BH1620FVC, when user selects mode with an automatic light meter, BH1620FVC real-time sampling ambient brightness value can pass to microprocessor STC12C5410AD, and microprocessor can constantly change the duty ratio of PWM output thus reach suitable brightness value.
LED based on STC single-chip microcomputer drives and a light modulating device, it is characterized in that: described alarm module adopts acoustic-optic alarm, carrys out output alarm information when there is overcurrent by Microprocessor S3C44B0X.
The utility model has following advantage compared to existing technology:
1, LED drive circuit circuit of the present utility model adopts high-power constant-current driven chip, and more conventional type of drive drive circuit is comparatively simple, sets arbitrarily the size of output current by adjustment reference input electric current.
2, the DD311 chip built-in output enable end of the utility model employing, by regulating the duty ratio of PWM to control the light modulation that Enable Pin realizes LED, dimming scope is 0%-100%.
3, the utility model can realize with an automatic light meter and hand-operating light mode, mode with an automatic light meter the difference of environmentally brightness can regulate the brightness of LED thus makes ambient brightness maintain suitable brightness automatically, and hand-operating light mode can realize the gamut light modulation of 0%-100%.
Accompanying drawing explanation
Fig. 1 is that a kind of LED based on STC single-chip microcomputer drives the system architecture diagram with light modulating device
Fig. 2 is that a kind of LED based on STC single-chip microcomputer drives the system principle diagram with light modulating device
Fig. 3 is that a kind of LED based on STC single-chip microcomputer drives the power circuit with light modulating device
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail:
Embodiment 1
Be illustrated in figure 1 a kind of LED based on STC single-chip microcomputer and drive the system architecture diagram with light modulating device.
Described system comprises 5 chief components: power module, LED drive module, control module, brightness detection module and alarm module.
Embodiment 2
Be illustrated in figure 2 a kind of LED based on STC single-chip microcomputer and drive the system principle diagram with light modulating device.
Described system principle diagram comprises LED drive module, control module, brightness detection module and alarm module.Described LED drive module adopts DD311 constant-current driven chip, and the pin 1 of DD311 meets the sampling resistor R1 of input resistance R2 and 1 Ω successively, another termination VCC-9V of sampling resistor R1; The pin 2 of DD311 connects the negative electrode of LED by the filter circuit be made up of R3 and C2, the anode of LED is connected with power supply by switch; Filter capacitor C1 is connected between VDD-to-VSS; The pin 3 of DD311 and pin 4 ground connection.Described control module adopts STC12C5410AD control chip, and the pin 5 of DD311 connects 9 pins of STC12C5410AD by the filter circuit that R4 and C3 forms; The 1 pin RST of STC12C5410AD connects the reset circuit of C7 and R5 composition; The 4 pin XTAL1 of STC12C5410AD and 5 pin XTAL2 meet the crystal oscillator X1 of 11.0592M, and crystal oscillator is other is connected to electric capacity C5, C6; The 12 pin P1.0 of STC12C5410AD connect K switch, and 13 pin P1.1 connect the adjustable side of potentiometer Re1, the another two termination 5V power supplys of potentiometer; The two ends of 16, the 17 pin connecting resistance R1 of STC12C5410AD; 18 pins of STC12C5410AD connect 5 pins of BH1620FVC; The 20 pin VCC of STC12C5410AD meet VCC-5V, the 10 pin GND ground connection of STC12C5410AD.Described brightness detection module adopts brightness sensing chip BH1620FVC, and the 1 pin VCC of BH1620FVC meets VCC-5V, 2 pin GND ground connection, and 3 pin GC1 and 4 pin GC2 meet VCC, and 5 pin IOUT are connected to R9 and C8.Described alarm module adopts LED and buzzer sound and light alarm, the negative electrode of D1 meets the 15 pin P1.3 of STC12C5410AD, the anode of D1 is received on VCC-5V by resistance R6, the base stage of triode BJT meets the 14 pin P1.2 of STC12C5410AD by resistance R7, resistance R8 is connected between the base stage of BJT and emitter, the grounded emitter of BJT, the collector electrode of BJT connects one end of buzzer BEEP, and the other end of buzzer meets VCC-5V by resistance R5.
Input 1 end of described DD311 carrys out the size of current of control input end by the resistance size of resistance R2, the electric current of output and the pass of input electric current are 1:100; The negative electrode of output 2 termination LED, LED D1, D2, D3 are respectively red, green, blue three kinds of high-power LED light sources, are controlled unlatching and the shutoff of LED by K switch 1, K2, K3, and three LED can work simultaneously, also can work independently; Electric capacity C1 between the anode voltage of LED and GND has the effect of energy storage and bypass, produces the probability of overshoot and undershoot when can lower high-current switch operation, thus keeps the stable of LED working power voltage; The 9 end PWM1 of the Enable Pin 5 termination STC12C5410AD of DD311, centre is connected to capacitance-resistance filter, the rise or fall time between Enable Pin signal can be made to extend, and then make the transient response of output current smooth-out.
Described STC12C5410AD chip carrys out control DD311 Enable Pin by exporting the PWM ripple of different duty reaches the object of light modulation, STC12C5410AD outside is connected to K switch, when the switches are opened, what select is mode with an automatic light meter, when the switch is closed, what select is hand-operating light mode, namely 9 ends of STC12C5410AD just can be made to export the PWM ripple of different duty by regulator potentiometer Re1, controls light modulation brightness by changing duty ratio.STC12C5410AD is with AD sampling functions; the maximum current that can bear due to DD311 input is 10mA; when input overcurrent; voltage on sampling resistor can more than 10mV, and the voltage swing of the R1 that therefore samples just can judge whether overcurrent; when there is overcurrent; the PWM1 of STC12C5410AD can stop producing PWM ripple, and LED will quit work thus complete defencive function, and microprocessor can start warning simultaneously.
The light intensity of described brightness sensing chip BH1620FVC real-time sampling environment under pattern with an automatic light meter, light intensity is converted to electric current and export to microprocessor STC12C5410AD from 5 end IOUT, microprocessor can regulate the generation of PWM ripple to make ambient brightness remain on optimum brightness according to the magnitude of voltage on sampling resistor R9, thus completes automatic brightness adjustment function.GC1 and GC2 of BH1620FVC connects high level, and namely gain mode is set to L, and luminance detection scope can reach 100,000 LX.
Described sound light alarming circuit is made up of LED alarm lamp and buzzerphone alarm apparatus, and adopt NPN triode to drive buzzer, R6 and R7 is current-limiting resistance, and R8 is mainly used in the mistake sounding preventing buzzer.When there is overcurrent, the P1.2 of STC12C5410AD can export high level drived control buzzer sounding, and the P1.3 of STC12C5410AD output low level can light LED, thus starts warning.
Embodiment 3
Be illustrated in figure 3 a kind of LED based on STC single-chip microcomputer and drive the power circuit with light modulating device.
Described power circuit is the one chip Switching Power Supply of 12V 1A, and it is input as 220V civil power, and its power output is 12W, exports 5V DC by L7805 voltage stabilizing chip, exports 9V DC by L7809.After input 220V AC, first 220V alternating current carries out bridge rectifier through rectifier bridge B1, then through C9 filtering, obtains about 300V high direct voltage, then passes through the primary coil N1 of high frequency transformer, provides required operating voltage to WS157.By the pwm signal that secondary coil N2 exports, through rectifier diode VD7 rectification, then through the π type filter circuit filtering that C12, C13 and L form, obtain the direct voltage output of 12V 1A.Described power circuit adopts basic feedback system, voltage on feedback coil N3 is by rectifier diode VD6 rectification, again after the filter circuit filtering of R11 and C11 composition, be added on control end 3 end of WS157 by control electric current, the absorption circuit be made up of VD5, R10 and C10 effectively can suppress peak-inverse voltage.Described power circuit exports has voltage regulation performance, when certain reason causes output voltage to decline, feedback coil voltage and control end electric current decrease, when the error voltage that WS157 chip internal produces rises, the duty ratio that PWM comparator exports rises, output voltage can be made to increase through the metal-oxide-semiconductor of chip and reduced output voltage circuit, thus it is constant to maintain output voltage.
Claims (4)
1. the LED based on STC single-chip microcomputer drives and a light modulating device, it is characterized in that: described device comprises power module, LED drive module, luminance adjustment module, alarm module and control module; Described power module is responsible for powering to LED drive module, luminance adjustment module, alarm module and control module; Described LED drive module comprises LED drive chip and switching device, and the control signal exported by control module carrys out driving LED luminescence; Described luminance adjustment module comprises luminance sensor and brightness regulating circuit, and the ambient brightness signal collected is sent to control module, and regulates the brightness of LED according to the feedback signal of control module; Described alarm module is made up of audible-visual annunciator, starts sound and light alarm by control module; Described control module comprises microprocessor and sample circuit, and output signal controls LED drive module, environmentally intensity control luminance adjustment module, controls alarm module action by sampling LED operating current size.
2. a kind of LED based on STC single-chip microcomputer according to claim 1 drives and light modulating device, it is characterized in that: described LED drive module adopts great power LED constant-current driven chip DD311.
3. a kind of LED based on STC single-chip microcomputer according to claim 1 drives and light modulating device, it is characterized in that: described control module adopts microprocessor STC12C5410AD.
4. a kind of LED based on STC single-chip microcomputer according to claim 1 drives and light modulating device, it is characterized in that: described luminance adjustment module adopts brightness transducer BH1620FVC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420787262.2U CN204291499U (en) | 2014-12-12 | 2014-12-12 | A kind of LED based on STC single-chip microcomputer drives and light modulating device |
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| CN201420787262.2U CN204291499U (en) | 2014-12-12 | 2014-12-12 | A kind of LED based on STC single-chip microcomputer drives and light modulating device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107422663A (en) * | 2017-05-25 | 2017-12-01 | 深圳市彬讯科技有限公司 | A kind of disinfection system of the automated biological identification based on high in the clouds control |
| CN107642733A (en) * | 2017-10-12 | 2018-01-30 | 泉州市泉港鑫林机械科技有限公司 | A kind of LED light modulating device based on Bluetooth control |
| CN109949726A (en) * | 2019-03-25 | 2019-06-28 | 山西高科华瑞电子科技有限公司 | A kind of LED display mould group automatic white balance debugging system and adjustment method |
| CN112333875A (en) * | 2020-11-30 | 2021-02-05 | 常州倍速智能科技有限公司 | Vehicle-mounted energy-saving illuminating lamp |
| CN112437517A (en) * | 2020-10-26 | 2021-03-02 | 成都华体慧城科技有限公司 | Automatic brightness adjusting system for intelligent street lamp |
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2014
- 2014-12-12 CN CN201420787262.2U patent/CN204291499U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422663A (en) * | 2017-05-25 | 2017-12-01 | 深圳市彬讯科技有限公司 | A kind of disinfection system of the automated biological identification based on high in the clouds control |
| CN107642733A (en) * | 2017-10-12 | 2018-01-30 | 泉州市泉港鑫林机械科技有限公司 | A kind of LED light modulating device based on Bluetooth control |
| CN109949726A (en) * | 2019-03-25 | 2019-06-28 | 山西高科华瑞电子科技有限公司 | A kind of LED display mould group automatic white balance debugging system and adjustment method |
| CN109949726B (en) * | 2019-03-25 | 2024-05-14 | 山西高科华瑞电子科技有限公司 | Automatic white balance debugging system and method for LED display screen module |
| CN112437517A (en) * | 2020-10-26 | 2021-03-02 | 成都华体慧城科技有限公司 | Automatic brightness adjusting system for intelligent street lamp |
| CN112333875A (en) * | 2020-11-30 | 2021-02-05 | 常州倍速智能科技有限公司 | Vehicle-mounted energy-saving illuminating lamp |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151212 |
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| EXPY | Termination of patent right or utility model |