CN105554948A - Light modulator - Google Patents
Light modulator Download PDFInfo
- Publication number
- CN105554948A CN105554948A CN201511035380.3A CN201511035380A CN105554948A CN 105554948 A CN105554948 A CN 105554948A CN 201511035380 A CN201511035380 A CN 201511035380A CN 105554948 A CN105554948 A CN 105554948A
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- CN
- China
- Prior art keywords
- triode
- current
- limiting resistance
- output port
- pwm
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Abstract
The invention provides a light modulator, which comprises a brightness adjusting unit, a micro control unit and a light drive unit, wherein the brightness adjusting unit generates a PWM signal; the micro control unit collects and processes a PWM signal and generates a PWM control signal; and the light drive unit receives the PWM control signal, and controls the brightness change of an LED through multi-stage drive. The light modulator has the beneficial effects that the brightness of the LED lamp can be adjusted according to the ambient brightness; light pollution is avoided; energy sources can be saved; and energy conservation and environmental protection are achieved.
Description
Technical field
The invention belongs to LED brightness regulating apparatus field, especially relate to a kind of dimmer.
Background technology
LED widely uses, and the brightness of existing LED is all certain, is not suitable for all environmental requirements like this, wastes energy again, and needing can the device of adjusting brightness of LED lamps according to demand.
Summary of the invention
In view of this, the present invention is intended to propose a kind of dimmer, can the brightness of environmentally brightness regulation LED, removes light pollution from, can save the energy, energy-conserving and environment-protective.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of dimmer, comprises brightness adjusting unit, micro-control unit and light driver element; Described brightness adjusting unit produces pwm signal; Described micro-control unit collection also processes described pwm signal, produces pwm control signal; Described light driver element receives described pwm control signal, controls LED luminance change by multiple drive power.
Further, described brightness adjusting unit comprises encoder, the first current-limiting resistance R1, the second current-limiting resistance R2 and RC filter circuit, described encoder comprises A output port and B output port, the one termination feeder ear of described first current-limiting resistance R1, the other end accesses described A output port, the one termination feeder ear of described second current-limiting resistance R2, the other end accesses described B output port, and the described pwm signal that described A output port and described B output port produce exports after the filtering of described RC filter circuit.
Further, described micro-control unit comprises microcontroller, reset circuit and clock circuit; Described microcontroller receives and processes described pwm signal, exports described pwm control signal; Described reset circuit comprises the 3rd electric capacity C3 and the 5th resistance R5 of series connection; Described clock circuit comprises the 4th electric capacity C4, the 5th electric capacity C5, crystal oscillator Y1 and the 6th resistance R6.
Further, described microcontroller is STM32F103VBT6.
Further, described light driver element comprises first order amplifying circuit, second level amplifying circuit and emitting led unit; Described first order amplifying circuit comprises the first triode Q1, for the base stage that the PWM-OUT end receiving described pwm control signal accesses described first triode Q1 by the 7th current-limiting resistance R7, between the emitter of described first triode Q1 and base stage, be serially connected with the 8th feedback resistance R8; Described second level amplifying circuit comprises the second triode Q2 and the 3rd triode Q3, the base stage of described second triode Q2 accesses the collector electrode of described first triode Q1 by the 9th current-limiting resistance R9, the base stage of described 3rd triode Q3 accesses the collector electrode of described first triode Q1 by the tenth current-limiting resistance R10, the emitter of described second triode Q2 and described 3rd triode Q3 is connected to described emitting led unit.
Relative to prior art, dimmer of the present invention has following advantage:
The present invention can stability contorting LED secretly bright, particularly in region that is more harsh to lighting demand or dimout, realize the brightness of linear regulation light, the requirement according to scene regulates brightness, bright generation light pollution can not be crossed due to light, waste energy, also due to excessively dark, work can not be affected, energy-conserving and environment-protective, reliable operation, convenient and practical, with a wide range of applications.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the illustrative view of functional configuration of the embodiment of the present invention;
Fig. 2 is the schematic diagram of brightness adjusting unit of the present invention;
Fig. 3 is micro-control unit schematic diagram of the present invention;
Fig. 4 is light driver element schematic diagram of the present invention.
Description of reference numerals:
1-brightness adjusting unit; 11-encoder; 12-RC filter circuit; 2-micro-control unit; 21-microcontroller; 22-reset circuit; 23-clock circuit; 3-light driver element; 31-first order amplifying circuit; 32-second level amplifying circuit; The emitting led unit of 33-.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Term " first ", " second " etc. only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, one or more these features can be expressed or impliedly be comprised to the feature being limited with " first ", " second " etc.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood by concrete condition.
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As shown in Figure 1, the invention provides a kind of dimmer, comprise brightness adjusting unit 1, micro-control unit 2 and light driver element 3; Described brightness adjusting unit is provided with encoder 11, by the knob of rotary encoder 11, produces pwm signal; Described micro-control unit 2 gathers and processes described pwm signal, by computing, produces pwm control signal; Described light driver element 3 receives described pwm control signal, adopts multiple drive power, increases driving force, controls LED luminance change.
As shown in Figure 2, described brightness adjusting unit 1 comprises encoder 11, first current-limiting resistance R1, the second current-limiting resistance R2 and RC filter circuit 12, described encoder 11 comprises A output port and B output port, the one termination feeder ear of described first current-limiting resistance R1, the other end accesses described A output port, the one termination feeder ear of described second current-limiting resistance R2, the other end accesses described B output port, the described pwm signal that described A output port and described B output port produce exports after the filtering of described RC filter circuit 12, makes the pwm signal that transfers out more stable.
As shown in Figure 3, described micro-control unit 2 comprises microcontroller 21, reset circuit 22 and clock circuit 23; Microcontroller STM32F103VBT6 selected by described microcontroller 21, and it receives the pwm signal that brightness adjusting unit 1 sends, and processes it, exports the pwm control signal being used for light modulation, by the duty cycle adjustment lamplight brightness of pwm control signal; Described reset circuit 22 comprises the 3rd electric capacity C3 and the 5th resistance R5 of series connection, makes microcontroller 21 electrification reset; Described clock circuit 23 comprises the 4th electric capacity C4, the 5th electric capacity C5, crystal oscillator Y1 and the 6th resistance R6, for microcontroller 21 provides clock signal.
As shown in Figure 4, described light driver element 3 comprises first order amplifying circuit 31, second level amplifying circuit 32 and emitting led unit 33; Described first order amplifying circuit 31 comprises the first triode Q1, for the base stage that the PWM-OUT end receiving described pwm control signal accesses described first triode Q1 by the 7th current-limiting resistance R7, between the emitter of described first triode Q1 and base stage, be serially connected with the 8th feedback resistance R8; Described second level amplifying circuit 32 comprises the second triode Q2 and the 3rd triode Q3, the base stage of described second triode Q2 accesses the collector electrode of described first triode Q1 by the 9th current-limiting resistance R9, the base stage of described 3rd triode Q3 accesses the collector electrode of described first triode Q1 by the tenth current-limiting resistance R10, the emitter of described second triode Q2 and described 3rd triode Q3 is connected to described emitting led unit 33, and the quantity of the LED in described emitting led unit 33 is adjustable.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a dimmer, is characterized in that: comprise brightness adjusting unit, micro-control unit and light driver element; Described brightness adjusting unit produces pwm signal; Described micro-control unit collection also processes described pwm signal, produces pwm control signal; Described light driver element receives described pwm control signal, controls LED luminance change by multiple drive power.
2. dimmer according to claim 1, it is characterized in that: described brightness adjusting unit comprises encoder, first current-limiting resistance (R1), second current-limiting resistance (R2) and RC filter circuit, described encoder comprises A output port and B output port, one termination feeder ear of described first current-limiting resistance (R1), the other end accesses described A output port, one termination feeder ear of described second current-limiting resistance (R2), the other end accesses described B output port, the described pwm signal that described A output port and described B output port produce exports after the filtering of described RC filter circuit.
3. dimmer according to claim 1, is characterized in that: described micro-control unit comprises microcontroller, reset circuit and clock circuit; Described microcontroller receives and processes described pwm signal, exports described pwm control signal; Described reset circuit comprises the 3rd electric capacity (C3) and the 5th resistance (R5) of series connection; Described clock circuit comprises the 4th electric capacity (C4), the 5th electric capacity (C5), crystal oscillator (Y1) and the 6th resistance (R6).
4. dimmer according to claim 3, is characterized in that: described microcontroller is STM32F103VBT6.
5. dimmer according to claim 1, is characterized in that: described light driver element comprises first order amplifying circuit, second level amplifying circuit and emitting led unit; Described first order amplifying circuit comprises the first triode (Q1), PWM-OUT for receiving described pwm control signal holds the base stage being accessed described first triode (Q1) by the 7th current-limiting resistance (R7), is serially connected with the 8th feedback resistance (R8) between the emitter of described first triode (Q1) and base stage; Described second level amplifying circuit comprises the second triode (Q2) and the 3rd triode (Q3), the base stage of described second triode (Q2) accesses the collector electrode of described first triode (Q1) by the 9th current-limiting resistance (R9), the base stage of described 3rd triode (Q3) accesses the collector electrode of described first triode (Q1) by the tenth current-limiting resistance (R10), the emitter of described second triode (Q2) and described 3rd triode (Q3) is connected to described emitting led unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511035380.3A CN105554948A (en) | 2015-12-31 | 2015-12-31 | Light modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511035380.3A CN105554948A (en) | 2015-12-31 | 2015-12-31 | Light modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105554948A true CN105554948A (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511035380.3A Pending CN105554948A (en) | 2015-12-31 | 2015-12-31 | Light modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105554948A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106714391A (en) * | 2017-03-07 | 2017-05-24 | 苏州佳世达电通有限公司 | Dimming device and dimming method thereof |
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| CN201035525Y (en) * | 2007-05-27 | 2008-03-12 | 翟乃强 | Light modulation mouse |
| US7439945B1 (en) * | 2007-10-01 | 2008-10-21 | Micrel, Incorporated | Light emitting diode driver circuit with high-speed pulse width modulated current control |
| CN101904218A (en) * | 2007-12-20 | 2010-12-01 | 奥斯兰姆有限公司 | Multifunctional output stage for driving dimmed light sources and related method |
| CN103744408A (en) * | 2014-01-25 | 2014-04-23 | 济南诺辉节能技术开发有限公司 | Indoor energy efficiency management system |
| CN204115587U (en) * | 2014-09-11 | 2015-01-21 | 长沙学院 | A kind of remote control fireworks setting-off device |
| CN104602411A (en) * | 2015-01-14 | 2015-05-06 | 惠州华阳通用电子有限公司 | LED brightness and chroma consistency adjusting device and method |
| CN205491278U (en) * | 2015-12-31 | 2016-08-17 | 天津罗斯诺普信息技术有限公司 | PWM light modulator |
-
2015
- 2015-12-31 CN CN201511035380.3A patent/CN105554948A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201035525Y (en) * | 2007-05-27 | 2008-03-12 | 翟乃强 | Light modulation mouse |
| US7439945B1 (en) * | 2007-10-01 | 2008-10-21 | Micrel, Incorporated | Light emitting diode driver circuit with high-speed pulse width modulated current control |
| CN101904218A (en) * | 2007-12-20 | 2010-12-01 | 奥斯兰姆有限公司 | Multifunctional output stage for driving dimmed light sources and related method |
| CN103744408A (en) * | 2014-01-25 | 2014-04-23 | 济南诺辉节能技术开发有限公司 | Indoor energy efficiency management system |
| CN204115587U (en) * | 2014-09-11 | 2015-01-21 | 长沙学院 | A kind of remote control fireworks setting-off device |
| CN104602411A (en) * | 2015-01-14 | 2015-05-06 | 惠州华阳通用电子有限公司 | LED brightness and chroma consistency adjusting device and method |
| CN205491278U (en) * | 2015-12-31 | 2016-08-17 | 天津罗斯诺普信息技术有限公司 | PWM light modulator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106714391A (en) * | 2017-03-07 | 2017-05-24 | 苏州佳世达电通有限公司 | Dimming device and dimming method thereof |
| CN106714391B (en) * | 2017-03-07 | 2018-05-18 | 苏州佳世达电通有限公司 | Light modulating device and its light-dimming method |
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Application publication date: 20160504 |