CN201491323U - Control drive circuit of music glaring color lamp - Google Patents
Control drive circuit of music glaring color lamp Download PDFInfo
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- CN201491323U CN201491323U CN2009201355462U CN200920135546U CN201491323U CN 201491323 U CN201491323 U CN 201491323U CN 2009201355462 U CN2009201355462 U CN 2009201355462U CN 200920135546 U CN200920135546 U CN 200920135546U CN 201491323 U CN201491323 U CN 201491323U
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Abstract
The utility model relates to a control circuit of a music glaring color lamp, which has the advantages of low cost. The control circuit comprises a baseband processor (BB), a control drive circuit (CDC) and a three-color LED colored lamp; the three-color LED colored lamp can twinkle in color and brightness along with the beats under the control of the CDC; the baseband processor is connected with the control drive circuit, and the communication content of the baseband processor and the control drive circuit includes GPIO control signals and music and audio signals; the control drive circuit is connected with the three-color LED colored lamp to control the twinkle of the colored lamp; and the circuit device is powered by a battery. Besides the characteristics of low cost and simple circuit, the circuit has the advantages of obvious dynamic of the twinkle of the colored lamp and good music beats synchronous effect.
Description
Technical field
The utility model relates to a kind of music cheaply and dazzles the color light control circuit, is a kind of circuit that the three-color LED color lamp is followed the music beat flicker of controlling specifically.Can be applicable among the consumer digital equipments such as mobile phone, PM3, PDA, also can be applicable to toy and other and dazzle color relevant equipment with music beat.
Background technology
The three-color LED color lamp can be according to the synthetic various color of the different brightness of its inside red light (R), three kinds of color lamps of green light (G) and blue lamp (B).Use special control Driver Circuit, the control tri coloured lantern is followed the music beat flicker and can be produced the magnificent color effect of dazzling, and attracts consumer's, particularly young fashion consumer's attention.Therefore music beat is dazzled color lamp and is more and more adopted in such as mobile phone, MP3, MP4 and PDA and high-grade toy, has wide development space.
Music beat is dazzled color lamp and is mainly contained amplitude control, FREQUENCY CONTROL and three kinds of modes of amplitude-frequency control with regard to control mode.Control is exactly that the color of three-color LED color lamp and the variation of brightness are controlled by the amplitude of audio signal based on amplitude; Based on FREQUENCY CONTROL is that the color of three-color LED color lamp and the variation of brightness are controlled by the frequency of audio signal; Based on amplitude-frequency control is that the color of three-color LED color lamp and the variation of brightness are controlled jointly by the amplitude and the frequency of audio signal.Present many employings amplitude control and amplitude-frequency control.
The technical implementation way that present music beat is dazzled color lamp mostly is and adopts analog circuit or digital circuit to realize.The analog circuit implementation adopts Analogical Circuit Technique merely.The digital circuit implementation adopts asic technology more, and elder generation with audio signal digitizing, carries out various Digital Signal Processing by AD then, controls the MOSFET driving LED colored lantern at last.This mode is controlled effective, and is flexible and changeable; Shortcoming is the circuit complexity, costs an arm and a leg.
Traditional mode based on audio frequency signal amplitude control is carried out mirror image to audio signal by its dc offset voltage usually, and the signal amplitude that will be lower than bias voltage is mirrored on the bias voltage, and as shown in Figure 1, the signal behind the mirror image is through amplifying driving LED.This control mode makes that the average current of LED is bigger, so LED is brighter, but can reduce the innervation that LED glimmers simultaneously.
The utility model content
Based on the problems referred to above, the purpose of this utility model provides a kind of music and dazzles the color light control drive circuit, this circuit can be handled three-color LED light flicker and bright problem effectively, makes three-color LED light not only have suitable lightness, and flicker is obviously dynamic.
Therefore, the technical problems to be solved in the utility model is to adopt the amplitude-frequency control mode, uses the hybrid circuit technology to realize that music beat dazzles color lamp.Be characterized in that cost is low, circuit is simple, and the flicker of color lamp is obviously dynamic, and is good synchronously with music beat.
The principle of this device is that the audio signal isolation of baseband controller BB output amplifies that the back is logical by high pass, band, low pass filter is separated into high audio, sound intermediate frequency and bass three road signals; Control a kind of LED of color after a series of conversions of this three tunnel audio signals process respectively based on its amplitude, as high audio signal controlling red LED, sound intermediate frequency signal controlling blue led, bass signal controlling green LED.
The utility model is achieved in that
A kind of music is dazzled the color light control drive circuit, comprise baseband processor (BB), control Driver Circuit (CDC) and three-color LED color lamp and battery, described three-color LED color lamp can be followed music beat and be carried out color and brightness flicker under the control of described control Driver Circuit, the described baseband processor row communication of going forward side by side that links to each other with described control Driver Circuit, the two Content of communciation comprises control signal and music audio signal; Described control Driver Circuit links to each other with described three-color LED color lamp, the flicker of control color lamp; Battery provides power supply for whole baseband processor, control Driver Circuit and three-color LED light.
Described control Driver Circuit (CDC) mainly is made up of isolated amplifier OP, power control circuit PRC, low pass filter LPF, high pass filter HPF, band pass filter BPF, reference voltage generator RVG, comparison circuit CC1, comparison circuit CC2, comparison circuit CC3 and drive circuit DRC; Isolated amplifier OP connects low pass filter LPF, band pass filter BPF, high pass filter HPF respectively, low pass filter LPF, band pass filter BPF, high pass filter HPF then connect comparison circuit CC1, comparison circuit CC2 and comparison circuit CC3 respectively, baseband processor directly connects power control circuit, drive circuit and reference voltage generator, provide control signal to power control circuit and drive circuit, reference voltage generator output is connected to comparison circuit CC1, comparison circuit CC2, comparison circuit CC3, and reference voltage is provided.The various piece effect is as follows:
Isolated amplifier OP isolates amplification to the audio signal from base band, avoids CDC interference tones signal and reduces audio signal quality.To the less demanding occasion of tonequality, if the audio signal carrying load ability of base band output is stronger, then isolating amplifier circuit OP also can omit at some.
Low pass filter LPF, band pass filter BPF, high pass filter HPF carry out filtering to the audio signal of isolating after amplifying, and audio signal is separated into low frequency, intermediate frequency and high frequency three road signals.Filter circuit can adopt based on the active power filtering of RC or LC and passive filter circuit.
Comparison circuit CC1, comparison circuit CC2 carry out shaping with low frequency, intermediate frequency and high-frequency signal that comparison circuit CC3 separates filtering respectively.Required reference voltage when reference voltage generator RVG is used to produce signal shaping, reference voltage can carry out real-time change with the size of input audio signal amplitude.
Impulse waveform control Driver Circuit DRC after the shaping drives the three-color LED color lamp.DRC can be controlled by GPIO by baseband controller BB simultaneously, is used to enable music and dazzles color function.Can be luminous when not being enabled when dazzling color function by common keyboard control mode backlight.The utility model is controlled the audio signal chopping by hybrid circuit, this circuit has that cost is low, and circuit is simple, and the flicker of color lamp is dynamic obviously, good with the music beat synchronous effect.
And the utility model reference comparison voltages can change along with the amplitude self adaptation of input audio signal; The mode that adopts frequency and amplitude to combine is controlled three-color LED light; Music is dazzled color function and can be closed, and does not influence the illumination functions of LED.
Power control circuit PRC is controlled by GPIO by baseband controller BB, is used to enable to close the power supply of this device, saves the electrical source consumption of portable terminal.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and the embodiments, in the accompanying drawing:
Fig. 1 is the audio signal mirror image oscillogram of prior art;
Fig. 2 is the utility model structured flowchart;
Fig. 3 is the structured flowchart of the utility model specific implementation;
Fig. 4 is the utility model audio signal shaping oscillogram;
Fig. 5 is the waveform schematic diagram of audio frequency signal amplitude and its zero crossing interval correlation;
Fig. 6 is a voltage controlled voltage source second-order low-pass filter circuit diagram.
Fig. 7 is the signal processing schematic diagram of reference voltage generator RVG;
Fig. 8 is a drive circuit DRC principle schematic;
Fig. 9 is a power control circuit PRC principle schematic.
Embodiment
Embodiment is described according to Fig. 2, block diagram shown in Figure 3.
Fig. 1 is the structured flowchart that the utility model is implemented, among the figure, the utility model includes baseband processor (BB), control Driver Circuit (CDC) and three-color LED color lamp and battery, described three-color LED color lamp can be followed music beat and be carried out color and brightness flicker under the control of described control Driver Circuit, the described baseband processor row communication of going forward side by side that links to each other with described control Driver Circuit, the two Content of communciation comprises control signal and music audio signal; Described control Driver Circuit links to each other with described three-color LED color lamp, the flicker of control color lamp; Battery provides power supply to the entire circuit device.
Fig. 3 dazzles the block diagram on colour TV road for the utility model music beat.Baseband controller BB provide audio signal, and by GPIO (universal input and output port) control Driver Circuit CDC is controlled; Baseband controller BB provides audio signal among the figure, and by GPIO (universal input and output port) control Driver Circuit CDC is controlled.Control Driver Circuit CDC mainly partly forms by isolating amplification OP, power control circuit PRC, low pass filter LPF, high pass filter HPF, band pass filter BPF, reference voltage generator RVG, comparison circuit CC1, comparison circuit CC2, comparison circuit CC3 and drive circuit DRC etc.
In order to take into account the innervation and the brightness of LED flicker, the utility model carries out shaping to audio signal, with the audio signal chopping, as shown in Figure 4.Device produces reference voltage earlier, and driving LED is luminous when audio signal is higher than this voltage; When being lower than reference voltage, audio signal extinguishes LED.Because the frequency of audio signal is not very high, thus its amplitude (among Fig. 5 a) and the crossing time span (d among Fig. 5) of audio signal and reference voltage very strong correlation is arranged, as shown in Figure 5.Can make that based on this correlation LED flicker brightness can be with the changes in amplitude of audio signal in the above-mentioned control mode.The advantage of this processing mode is audio signal not to be carried out mirror image, and the light on and off of LED has time enough at interval, so the flicker innervation of LED can be enhanced.The average current of LED is enough big on the other hand, can make that therefore the flicker of LED is enough bright.
Audio frequency isolated amplifier OP is not necessary, if the driving force of sound source signal enough also can not used audio frequency amplifier by force.Usually can use operational amplifier to realize isolated amplifier OP, the simplest as voltage follower etc.
Filter (high pass filter HPF, band pass filter BPF, low pass filter LPF) can use passive filter, also can use active filter.In order to guarantee enough amplitudes, adopted active filter in this device; In order significantly audio signal to be separated into high, medium and low three frequency ranges as far as possible, thereby make that the change color of redgreenblue lamp is obvious, adopt second-order filter circuit in this device.Classical voltage controlled voltage source second-order low-pass filter, voltage controlled voltage source second-order bandpass filter and voltage controlled voltage source bivalent high-pass filter are adopted in high, medium and low filtering respectively.Low pass filter as shown in Figure 6, its parameter can be adjusted according to the actual flicker effect of tri coloured lantern.For the signal amplitude difference of three frequency ranges guaranteeing to obtain after the audio frequency filtering is not very big, thereby need the special gain of adjusting filter to guarantee that the LED luminance difference of three kinds of colors of RGB is not too large.For the flicker effect that obtains, the frequency range of high, medium and low three frequency ranges is chosen needs careful debugging.
Comparison circuit is mainly used in filtered audio signal is carried out digitlization, promptly realizes waveform shaping function shown in Figure 4.The physical circuit of realizing above-mentioned shaping feature is a lot, and is the simplest as comparator.What need special concern is the voltage reference (comparative voltage) of comparison circuit.Owing to output to the audio frequency signal amplitude possibility different (regulating volume) of this device from base band as the user, in order to make that the luminance difference of color lamp is as far as possible little under louder volume and amount of bass condition, promptly dazzle color flicker effect and not influenced by the audio frequency signal amplitude size, reference voltage generator RVG need be according to the different different reference voltages of audio frequency signal amplitude output.
The signal processing of reference voltage generator RVG as shown in Figure 7, it is input as the output of isolated amplifier OP, by generating reference voltage base by low pass filter and through signal conditioning circuit behind the rectification circuit.
Drive circuit DRC is used to drive three-color LED, if the low weight comparison circuit (CC) that can directly use comparator to constitute of the LED load of using drives.The three chromatic number amounts of Qu Donging are more if desired, then need special driving circuit DRC to drive.Adopt NPN transistor to constitute drive circuit DRC in this device, as shown in Figure 8.Drive circuit can be by the GPIO1 control of base band BB output, and GPIO1 is set to input pattern (high impedance status) when color function is dazzled in use; Do not use that GPIO1 is set to height when dazzling color function, thereby close and do not influence the illumination functions of keyboard back light.
Power control circuit PRC is used for closing the power supply of whole device, reduces the standby current of portable mobile termianl, prolongs standby time.The use P channel mosfet of power control circuit PRC in this device, as shown in Figure 9, its conducting is controlled by GPIO2 with closing by base band BB.
Can lump together the simpler physical circuit of use according to different application scenarios with different LED load diagram 3 described several functional modules realizes.As stronger, isolated amplifier OP, filter, comparison circuit and drive circuit can be combined under the less situation of LED load and use three operational amplifiers to realize in the source of sound driving force.
The description of one of execution mode that the above only may adopt for the utility model does not constitute the qualification to the utility model protection range.Any any modification of being made within the spirit and principles in the present invention, be equal to and replace and improvement etc., all within claim protection range of the present utility model.
Claims (3)
1. a music is dazzled the color light control drive circuit, it is characterized in that this control Driver Circuit includes baseband processor, control Driver Circuit and three-color LED color lamp and battery, described three-color LED color lamp can be followed music beat and be carried out color and brightness flicker under the control of described control Driver Circuit, the described baseband processor row communication of going forward side by side that links to each other with described control Driver Circuit, the two Content of communciation comprises control signal and music audio signal; Described control Driver Circuit links to each other with described three-color LED color lamp, the flicker of control color lamp; Battery provides power supply for whole baseband processor, control Driver Circuit and three-color LED light.
2. music as claimed in claim 1 is dazzled the color light control drive circuit, it is characterized in that described control Driver Circuit mainly is made up of isolated amplifier OP, power control circuit PRC, low pass filter LPF, high pass filter HPF, band pass filter BPF, reference voltage generator RVG, comparison circuit CC1, comparison circuit CC2, comparison circuit CC3 and drive circuit DRC; Isolated amplifier OP connects low pass filter LPF, band pass filter BPF, high pass filter HPF respectively, low pass filter LPF, band pass filter BPF, high pass filter HPF then connect comparison circuit CC1, comparison circuit CC2 and comparison circuit CC3 respectively, baseband processor directly connects power control circuit and reference voltage generator, drive circuit, provide control signal to power control circuit and drive circuit, reference voltage generator output is connected to comparison circuit CC1, comparison circuit CC2, comparison circuit CC3, and reference voltage is provided.
3. music as claimed in claim 2 is dazzled the color light control drive circuit, it is characterized in that active power filtering or the passive filter circuit of the filter circuit employing of above-mentioned low pass filter LPF, band pass filter BPF, high pass filter HPF based on RC or LC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201355462U CN201491323U (en) | 2009-03-09 | 2009-03-09 | Control drive circuit of music glaring color lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201355462U CN201491323U (en) | 2009-03-09 | 2009-03-09 | Control drive circuit of music glaring color lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201491323U true CN201491323U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201355462U Expired - Fee Related CN201491323U (en) | 2009-03-09 | 2009-03-09 | Control drive circuit of music glaring color lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201491323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856851A (en) * | 2014-02-28 | 2014-06-11 | 常州扬仕信息科技有限公司 | Wireless lamplight loudspeaker box |
| CN105635915A (en) * | 2016-03-01 | 2016-06-01 | 广西理工职业技术学院 | Audio spectrum columnar display |
-
2009
- 2009-03-09 CN CN2009201355462U patent/CN201491323U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856851A (en) * | 2014-02-28 | 2014-06-11 | 常州扬仕信息科技有限公司 | Wireless lamplight loudspeaker box |
| CN103856851B (en) * | 2014-02-28 | 2017-08-15 | 常州扬仕信息科技有限公司 | Wireless lighting audio amplifier |
| CN105635915A (en) * | 2016-03-01 | 2016-06-01 | 广西理工职业技术学院 | Audio spectrum columnar display |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20170309 |