CN102421230A - Color adjusting driver for LED (Light-Emitting Diode) lamp - Google Patents
Color adjusting driver for LED (Light-Emitting Diode) lamp Download PDFInfo
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- CN102421230A CN102421230A CN2011102727642A CN201110272764A CN102421230A CN 102421230 A CN102421230 A CN 102421230A CN 2011102727642 A CN2011102727642 A CN 2011102727642A CN 201110272764 A CN201110272764 A CN 201110272764A CN 102421230 A CN102421230 A CN 102421230A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention discloses a color adjusting driver for an LED (Light-Emitting Diode) lamp. A time division multiplexing (TDM) control module is used for dividing light source module control signals corresponding to three colors in the aspect of time so as to make one light source module control signal at most is at high level at any one moment, one path of a power output module at most outputs driving voltage or current so as to drive a corresponding light source module to emit light, so that electric energy supplied by a power converter is sequentially distributed to different branches for use in different time segments, the problem of overload of the power converter, caused by overlaid power peak values, does not exist, and thus, the power configuration of the power converter can be reduced to be 1/3 of that of the prior art. The power of the power converter is reduced, subsequently, the size and the weight of the power converter are both reduced, and thus, the cost of the LED lamp is saved.
Description
Technical field
The invention belongs to LED lamp control technology field, more specifically, relate to a kind of LED lamp color and regulate driver.
Background technology
The LED lamp owing to have long, advantages such as energy consumption is low, energy-conserving and environment-protective of life-span, just is being widely used in fields such as commerce, industry, road, advertising lamp box as a kind of new light sources of high benefit.
Along with the extensive use of LED lamp, people are also increasingly high to the requirement of LED lamp, formed the multiple control modes from single brightness regulation to color adjustment.The control mode that color adjustment adopts mainly comprises the linearity light adjusting of analog form, the PWM of digital form (Pulse Width Modulation, pulse width modulation) light modulation.
The not special restriction in the driving aspect that the LED lamp color is regulated serves as main guiding with the realization function, and the general structure that is total to anode or common cathode that adopts is supplied power with the constant voltage mode, with the variation of its color of pwm signal control.But, mainly, control its color change with PWM with the type of drive of every group of independence constant current for the fixing application scenario of light-source structure.
Control the color LED lamp of mixing colours for pwm signal; Be the problem that the power supply changeover device of avoiding the power peak stack to bring transships, the maximum power sum when common led light source module with three kinds of colors works independently is as the power of LED lamp power supply changeover device.But the actual power loss maximum of LED lamp has only about 1/3rd of power supply changeover device power; Power sum when the power supply changeover device power configuration works independently with three kinds of color light source modules like this is a benchmark; Then can cause the waste of configuration power supply changeover device power; Simultaneously, cause also that the power supply changeover device volume is big, weight is heavier, cost is higher relatively.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of power supply changeover device power LED lamp color suitable that make to regulate driver with LED lamp actual power loss maximum.
For realizing above-mentioned purpose, LED lamp color of the present invention is regulated driver, it is characterized in that, comprising:
One time-division multiplexing control module; The time division multiplexing control module has three registers and communication interface; Three registers are respectively applied for the turn-on time of storage redness, green and blue-light source module, and communication interface is connected with the toning control circuit, receives data turn-on time from redness, green and the blue-light source module of toning control circuit; Be used to regulate and upgrade the turn-on time of redness, green and the blue-light source module of three register-stored, realize the color adjustment of LED lamp; The output of three road light source module control signals is arranged, the control of corresponding respectively redness, green and blue three colors;
In control cycle, at first that first color is corresponding light source module control signal becomes high level from low level, and keeps corresponding turn-on time; Then; After the corresponding light source module control signal of first color became low level, the light source module control signal that second color is corresponding became high level from low level, and keeps corresponding turn-on time; At last; After the corresponding light source module control signal of second color became low level, the light source module control signal that the 3rd color is corresponding became high level from low level, and keeps corresponding turn-on time;
One power output module, when the corresponding light source module control signal of a certain color is high level, outputting drive voltage or electric current, it is luminous to drive corresponding light source module;
Time division multiplexing control module, power output module all are connected with power supply changeover device, and power supply changeover device is that time division multiplexing control module, power output module provide DC power supply.
The present invention seeks to realize like this:
LED lamp color of the present invention is regulated driver through the time division multiplexing control module; The light source module control signal that three colors are corresponding was cut apart in the time; Make them at any one constantly, have one to be in high level at the most, power output module is one road outputting drive voltage or electric current at the most; It is luminous to drive corresponding light source module; The electric energy that like this power supply changeover device is provided is distributed to different branch roads in different time sections successively and is used, and does not just have the problem of the power supply changeover device overload that the power peak stack brings, thereby the power supply changeover device power configuration can be reduced to 1/3rd of prior art.Reducing of power supply changeover device power means that its volume and weight all reduces, thereby saved the cost of LED lamp.
Description of drawings
Fig. 1 is that LED lamp color of the present invention is regulated a kind of embodiment schematic diagram of driver;
Fig. 2 is a kind of embodiment schematic diagram of time division multiplexing control module shown in Figure 1;
Fig. 3 is a kind of embodiment theory diagram of power output module shown in Figure 1;
Fig. 4 is the another kind of embodiment theory diagram of power output module shown in Figure 1;
Fig. 5 is the sequential chart of light source module control signal at different next instantiations of color state.
Embodiment
Describe below in conjunction with the accompanying drawing specific embodiments of the invention, so that those skilled in the art understands the present invention better.What need point out especially is that in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these were described in here and will be left in the basket.
Fig. 1 is that LED lamp color of the present invention is regulated a kind of embodiment schematic diagram of driver.
In the present embodiment, as shown in Figure 1, the LED lamp color is regulated driver 2 and is comprised time division multiplexing control module 201 and power output module 202.
Time division multiplexing control module 201 has three road light source module control signal PMW1, PMW2, PMW3 output, the control of corresponding respectively redness, green and blue three colors.
Time division multiplexing control module 201, power output module 202 all are connected with power supply changeover device 1, and power supply changeover device 1 provides DC power supply for time division multiplexing control module 201, power output module 202.In the present embodiment, power supply changeover device 1 comprises AC-DC transducer 101 and plug 102; Plug 102 is single-phase three end plugs, comprises live wire end L, earth terminal E, zero line side N, is connected with electrical network through plug-in power pack transducer 1, obtains AC power.AC-DC transducer 101 will convert DC power supply into from the AC power that electrical network obtains, and offer time division multiplexing control module 201, power output module 202.The structure and the principle of power supply changeover device belong to prior art, repeat no more at this.
Fig. 2 is a kind of embodiment schematic diagram of time division multiplexing control module shown in Figure 1.
In the present embodiment, as shown in Figure 2, time division multiplexing control module 201 comprises a microprocessing unit (MCU) 2011 and DC-DC transducer 2012; Three register R1～R3 and communication interface are arranged in the microprocessing unit 2011, and in the present embodiment, communication interface is DALI interface (Digital Addressable Lighting Interface, the lighting interface of digital address).
Three register R1～R3 are respectively applied for the turn-on time of storage redness, green and blue-light source module; Communication interface is connected with the toning control circuit; Reception is from data DATA turn-on time of redness, green and the blue-light source module of toning control circuit; Be used to regulate and upgrade the turn-on time of redness, green and the blue-light source module of three register R1～R3 storage, realize the color adjustment of LED lamp.
Because in the present embodiment; 1 output of power supply changeover device, one road power supply Vdd, because it need provide power supply to power output module simultaneously, its magnitude of voltage is higher; Therefore need be with its step-down; To satisfy the requirement of microprocessing unit 2011 required power supplys, DC-DC transducer 2012 carries out step-down with power supply Vdd exactly, exports the power supply as microprocessing unit 2011 then.
Fig. 3 is a kind of embodiment theory diagram of power output module shown in Figure 1.
In the present embodiment; As shown in Figure 3; Power output module 202 comprises three constant-flow driver Q1～Q3, and said constant-flow driver Q1～Q3 all has the PWM dimming interface, when a certain road light source module control signal is high level; Being attached thereto the constant-flow driver that connects has drive current output, and it is luminous to drive corresponding light source module.In addition, constant-flow driver is a constant-current supply with open-circuit-protection.
In control cycle T,, become high level for red corresponding light source module control signal PWM1 from low level in the present embodiment at first with first color; And keep corresponding t1 turn-on time, then, at first color; After promptly red corresponding light source module control signal PWM1 becomes low level,, become high level for green corresponding light source module control signal PWM2 from low level in the present embodiment with second color; And keep corresponding t2 turn-on time, last, at second color; After promptly green corresponding light source module control signal becomes low level; With the 3rd color, promptly blue corresponding light source module control signal PWM3 becomes high level from low level, and keeps corresponding t3 turn-on time.
As shown in Figure 1, the nonoverlapping three road light source module control signal PWM1～PWM3 signals of time division multiplexing control module 201 output high level, when light source module control signal PWM1 was high level, it is luminous that constant-flow driver Q1 output driving current drives the red light source module; When light source module control signal PWM2 was high level, it is luminous that constant-flow driver Q2 output driving current drives the green light source module; When light source module control signal PWM3 is high level; It is luminous that constant-flow driver Q3 output driving current drives the blue-light source module; Thereby realize the defeated power different time sections in control cycle T of power supply, be assigned to the red light source module, be assigned to the green light source module, be assigned on the blue-light source module via constant-flow driver Q3 via constant-flow driver Q2 via constant-flow driver Q1.
Through t1～t3 turn-on time of redness, green and blue-light source module is set, the high level time of control light source module control signal PWM1, PWM2 and PWM3 is realized the adjusting of LED lamp color.
In the present embodiment; The LED lamp is that a rated power is the 20W color flat lamp of mixing colours; The blue-light source module that the green light source module that the red light source module that the Lights section is made up of 24 0.06W of 14 strings and red simple grain, 24 0.06W of 14 strings and green simple grain are formed and 24 0.06W of 14 strings and blue simple grain are formed constitutes, and the light source module of three colors adopts independent loop to connect separately.
Fig. 4 is the another kind of embodiment theory diagram of power output module shown in Figure 1.
In the present embodiment; As shown in Figure 3, power output module 202 comprises a constant-flow driver 2021 and three switching tube K1～K3, and constant-flow driver 202 is a constant-current supply with open-circuit-protection; Three switching tube K1～K3 respectively with the light source module D1 of corresponding color～D3 series connection separately; All be connected to the output of constant-flow driver 2021 then, three road light source module control signal PWM1, PWM2 and PWM3 receive the control end of the switching tube K1～K3 of corresponding color respectively, when a certain road light source module control signal is high level; Be attached thereto the switching tube conducting that connects, it is luminous that constant-flow driver has output to drive corresponding light source module through this switching tube.This mode, with respect to power output module shown in Figure 3, constant-flow driver of its needs, cost greatly reduces like this.
Fig. 5 is the sequential chart of light source module control signal at different next instantiations of color state.
In the present embodiment; As shown in Figure 5; (a)～(b) be light source module control signal at different color states, promptly white Gao Liang, bag look are half bright, light source module control signal PWM1, PWM2 and the PWM3 signal timing diagram of purple Gao Liang, purple half bright, red Gao Liang, red half bright time division multiplexing control module down output.Wherein, turn-on time t1 corresponding light source module control signal PWM1 high level time, turn-on time t2 corresponding light source module control signal PWM2 high level time, turn-on time, t3 was to the PWM3 high level time, wherein T=4ms is the PWM cycle.
Fig. 5 (a) is depicted as the high bright state time division multiplexing module sequential chart of white; T1=4/3ms, t2=4/3ms, t3=4/3ms; T1+t2+t3=T; Constant-flow driver Q1～Q3 power output sum is about 20W, and red light source module, green light source module and blue-light source module are all with 1/3 power work, and the power consumption of the light source module of each color is 6.67W.
Fig. 5 (b) is depicted as white half bright state time division multiplexing module sequential chart; T1=2/3ms, t2=2/3ms, t3=2/3ms; T1+t2+t3=T/2; Constant-flow driver Q1～Q3 power output sum is about 10W, and red light source module, green light source module and blue-light source module are all with 1/6 power work, and the power consumption of the light source module of each color is 3.33W.In addition, in control time T, evenly at interval, can further keep the stationarity of power supply changeover device 1 power output like this between the high level of each light source module control signal PWM1～PWM3.
Fig. 5 (c) is depicted as the high bright state time division multiplexing module sequential chart of purple, t1=2ms, t2=0ms; T3=2ms; T1+t2+t3=T, constant-flow driver Q1, Q3 power output sum are about 20W, and red light source module and blue-light source module are all with half-power work; Be that power consumption is 10W, and the green light source module is not worked.
Fig. 5 (d) is depicted as purple half bright state time division multiplexing module sequential chart, t1=1ms, t2=0ms; T3=1ms; T1+t2=T/2, constant-flow driver Q1, Q3 power output sum are about 10W, and red light source module and blue-light source module are all with 1/4 power work; Be that power consumption is 5W, and the green light source module is not worked.
Fig. 5 (e) is depicted as red high bright state time division multiplexing module sequential chart, t1=4ms, t2=0ms; T3=0ms; T1+t2+t3=T, constant-flow driver Q1 power output is about 20W, and the red light source module is with full power operation; Be that power consumption is 20W, and green light source module and blue-light source module are not worked.
Fig. 5 (f) is depicted as red high bright state time division multiplexing sequential chart, t1=2ms, t2=0ms; T3=0ms, t1+t2+t3=T/2, the about 10W of constant-flow driver Q1 power output; The red light source module is with half-power work, and promptly power consumption is 10W, and green light source module and blue-light source module are not worked.
More than provided the instance of 6 color adjustment; Other color states can be through the high level time of adjustment light source module control signal PWM1, PWM2 and PWM3; That is: change t1 turn-on time, t2 and t3; Control red light source module, green light source module and blue-light source module luminous power, thus colour mixture becomes the different color state.For the adjusting of a certain color, keeping change t1 turn-on time, t2 and t3, but t1, t2 and t3 sum being kept a definite value under the constant situation of brightness.
Simultaneously; Fig. 5 can find out, as long as the maximum power of LED lamp confirms that the maximum power of each light source module is also just confirmed; And the maximum power of LED lamp is identical; This is because the high-high brightness of monochromatic high-high brightness when luminous during with three-colour light-emitting should be consistent, not so during color adjustment, luminance transformation can take place.
In the present embodiment, if adopt the traditional driving mode, light source module control signal PWM1, PWM2 and PWM3 can occur and be high level, the situation of power peak stack needs the power supply changeover device of configuration 60W this moment.And adopt scheme of the present invention, power supply changeover device power is 1/3rd of traditional scheme.In addition since can the emergent power peak value situation of stack, power output is also comparatively steady.
In the present embodiment, as shown in Figure 5, in control time T, evenly at interval, can further keep the stationarity of power supply changeover device 1 power output like this between the high level of each light source module control signal PWM1～PWM3.
Light source module control signal pwm signal of the present invention adopts positive logic; With the high level is effective; Power controlling output module output, the light source module that drives three colors is luminous, and the present invention also can the employing negative logic; Or the mode of mixed logic mixing, realize the control that the power output peak value is complementary.
Although above the illustrative embodiment of the present invention is described; So that the technical staff in present technique field understands the present invention, but should be clear, the invention is not restricted to the scope of embodiment; To those skilled in the art; As long as various variations appended claim limit and the spirit and scope of the present invention confirmed in, these variations are conspicuous, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (6)
1. a LED lamp color is regulated driver, it is characterized in that, comprising:
One time-division multiplexing control module, time division multiplexing control module have three registers and communication interface; Three registers are respectively applied for the turn-on time of storage redness, green and blue-light source module; Communication interface is connected with the toning control circuit; Reception is from data turn-on time of redness, green and the blue-light source module of toning control circuit; Be used to regulate and upgrade the turn-on time of redness, green and the blue-light source module of three register-stored, realize the color adjustment of LED lamp; The output of three road light source module control signals is arranged, the control of corresponding respectively redness, green and blue three colors;
In control cycle, at first that first color is corresponding light source module control signal becomes high level from low level, and keeps corresponding turn-on time; Then; After the corresponding light source module control signal of first color became low level, the light source module control signal that second color is corresponding became high level from low level, and keeps corresponding turn-on time; At last; After the corresponding light source module control signal of second color became low level, the light source module control signal that the 3rd color is corresponding became high level from low level, and keeps corresponding turn-on time;
One power output module, when the corresponding light source module control signal of a certain color is high level, outputting drive voltage or electric current, it is luminous to drive corresponding light source module;
Time division multiplexing control module, power output module all are connected with power supply changeover device, and power supply changeover device is that time division multiplexing control module, power output module provide DC power supply.
2. LED lamp color according to claim 1 is regulated driver, it is characterized in that described communication interface is digital addressable lighting interface.
3. LED lamp color according to claim 1 is regulated driver, it is characterized in that described power output module comprises three constant-flow drivers, and constant-flow driver is a constant-current supply with open-circuit-protection; When a certain light source module control signal PWM was high level, being attached thereto the constant-flow driver that connects had drive current output, and it is luminous to drive corresponding light source module.
4. LED lamp color according to claim 1 is regulated driver, it is characterized in that described power output module comprises a constant-flow driver and three switching tubes;
Constant-flow driver is a constant-current supply with open-circuit-protection; Three switching tubes respectively with the light source module series connection of corresponding color separately; All be connected to the output of constant-flow driver then, three road light source module control signals are received the control end of switching tube of corresponding color respectively, when a certain road light source module control signal is high level; Be attached thereto the switching tube conducting that connects, it is luminous that constant-flow driver has output to drive corresponding light source module through this switching tube.
5. LED lamp color according to claim 1 is regulated driver; It is characterized in that; Described color adjustment is: change the turn-on time of redness, green and blue-light source module, but sum turn-on time of redness, green and blue-light source module is kept a definite value.
6. LED lamp color according to claim 1 is regulated driver, it is characterized in that, and is in control time T, at interval even between the high level of the light source module control signal that described three colors are corresponding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510353103.0A CN104936350B (en) | 2011-09-15 | 2011-09-15 | A kind of light-dimming method of LED light emission device |
| CN201110272764.2A CN102421230B (en) | 2011-09-15 | 2011-09-15 | A kind of LED color adjustment driver |
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| CN201110272764.2A CN102421230B (en) | 2011-09-15 | 2011-09-15 | A kind of LED color adjustment driver |
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| CN201510353103.0A Division CN104936350B (en) | 2011-09-15 | 2011-09-15 | A kind of light-dimming method of LED light emission device |
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| CN102421230A true CN102421230A (en) | 2012-04-18 |
| CN102421230B CN102421230B (en) | 2015-08-05 |
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| CN201110272764.2A Expired - Fee Related CN102421230B (en) | 2011-09-15 | 2011-09-15 | A kind of LED color adjustment driver |
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| CN103179757A (en) * | 2013-03-25 | 2013-06-26 | 浙江海振电子科技有限公司 | Time-sharing multi-path constant current driving light emitting diode (LED) lamp |
| CN103634986A (en) * | 2013-11-04 | 2014-03-12 | 惠州雷士光电科技有限公司 | Multipath dimming device and dimming method thereof |
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| CN103634986B (en) * | 2013-11-04 | 2016-10-19 | 惠州雷士光电科技有限公司 | Multichannel light modulating device and light-dimming method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102421230B (en) | 2015-08-05 |
| CN104936350B (en) | 2017-12-12 |
| CN104936350A (en) | 2015-09-23 |
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