CN102316648B - Light-emitting diode (LED) illuminating device - Google Patents
Light-emitting diode (LED) illuminating device Download PDFInfo
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- CN102316648B CN102316648B CN201110273159.7A CN201110273159A CN102316648B CN 102316648 B CN102316648 B CN 102316648B CN 201110273159 A CN201110273159 A CN 201110273159A CN 102316648 B CN102316648 B CN 102316648B
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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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Abstract
The invention discloses a light-emitting diode (LED) illuminating device. The output light power of red, green and blue light source module groups is regulated in a traditional way of regulating the duty ratio of the driving current or voltage of the red, green and blue light source module groups, so the brightness and color regulation is realized. On the basis of the adoption of three-base-color light source module group by the traditional LED illuminating device, an amber light source module group or warm white light source module group is added, and the output light power is regulated through regulating the duty ratio of the driving current or voltage of the amber light source module group or warm white light source module group, so the illumination color temperature of the LED illuminating device is regulated. Therefore, the LED illuminating device realizes the simultaneous regulation of three illumination parameters of the brightness, the color and the color temperature, the scene illumination and the functional illumination can be met, and the LED illuminating device has the characteristics of high color rendering performance, high luminous flux and low cost.
Description
Technical field
The invention belongs to lighting technical field, more specifically say, relate to a kind of LED lighting device.
Background technology
LED lighting device is as a kind of new light sources of high benefit, owing to having long, the advantage such as energy consumption is low, energy-conserving and environment-protective of life-span, is just being widely used in the fields such as business, industry, road, advertising lamp box.
Along with the extensive use of LED lighting device, people are also more and more higher to the requirement of LED lighting device, formed adjusting, the multiple regulative mode of color adjustment from single brightness regulation to colour temperature.For ease of regulating, degree of lightening, color-temperature regulating and the LED lighting device great majority of mixing colours color adopt PWM (Pulse WidthModulation, pulse width modulation) mode.
Traditional color temperature adjustable LED illuminating device, its colour temperature and brightness are adjustable, can not regulate color, be mainly used in function lighting, the general driver of two passages that adopts drives respectively high color temperature, low color temperature light sources module, the duty ratio of regulation output voltage or electric current, realizes the adjusting of colour temperature and brightness.
Traditional color adjustable LED illuminating device, its color and brightness are adjustable, can not regulate colour temperature, be mainly used in lighting engineering and sight illumination, it adopts the driver of three passages to drive respectively redness, green and blue-light source module, the duty ratio of regulation output voltage or electric current, realizes the adjusting of color and brightness.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, all adjustable LED lighting devices of a kind of brightness, colour temperature and three lighting parameters of color are provided.
For achieving the above object, LED lighting device of the present invention, comprising:
Red (Red), green (Green), blue (Blue) light source module;
One AC-DC power module, is connected with civil power AC network, for alternating current is converted to direct current;
One LED driver module, is connected with the direct current of AC-DC power module output, and AC-DC power module provides DC power supply for LED driver module, and LED driver module is used for lighting and extinguishing of driving light source module.
One control module, the redness that its output duty cycle is adjustable, green, blue three groups of pulse-width signals are to LED driver module, regulate respectively LED driver module to export to redness, green, the drive current of blue-light source module or the duty ratio of voltage, thereby regulate the color of LED lighting device;
It is characterized in that, also comprise: amber (Amber) light source module or warm white (Warm White) light source module, control module is exported the adjustable amber or warm white pulse-width signal of one group of duty ratio to LED driver module, regulate LED driver module to export to amber (Amber) light source module or warm white (Warm White) drive current of light source module or the duty ratio of voltage, thereby regulate the colour temperature of LED lighting device.
The present invention seeks to realize like this:
In the present invention, the mode of, the drive current of blue-light source module red, green by traditional adjusting or the duty ratio of voltage regulates the Output optical power of redness, green, blue-light source module, thereby realizes the adjusting of brightness and color.At traditional LED lighting device, adopt on the basis of three primary light source module, the present invention increases by one group of amber light source module or warm white light source module, by regulating the duty of its drive current or voltage recently to regulate its Output optical power, thus the colour temperature of adjusting LED lighting device.Like this, when LED lighting device of the present invention has been realized brightness, color and three lighting parameters of colour temperature, regulate, both can meet sight illumination, can meet function lighting again, there is high-color rendering, high light flux, feature cheaply.
Accompanying drawing explanation
Fig. 1 is a kind of embodiment schematic diagram of LED lighting device of the present invention;
Fig. 2 is the another kind of embodiment schematic diagram of LED lighting device of the present invention;
Fig. 3 is pulse-width signal one sequential chart of the time multiplexing signal output interface output shown in Fig. 1;
Fig. 4 is another sequential chart of pulse-width signal of the time multiplexing signal output interface output shown in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.Requiring particular attention 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 are described in here and will be left in the basket.
, if adopt traditional PWM (Pulse Width Modulation, pulse width modulation), can there is the problem of power peak stack in LED lighting device of the present invention.For avoiding power overload, the power supply changeover device of LED lighting device, the power that is power module is all that the gross power with whole light source modules is configured, but the actual maximum average power of LED lighting device only has 1/4th left and right of power module power, can cause like this power waste, meanwhile, also cause that power volume is large, weight is heavier, the defect that cost is relatively high.
In the present embodiment, control module adopts time division multiplexing control module, redness, green, blueness and cycle amber or warm white pulse-width signal that four groups of duty ratios of its output are adjustable are identical, and at synchronization, only have at most one for effective drive level, drive corresponding light source module to light.Like this, LED lighting device of the present invention, by time division multiplexing control module, redness, green, blueness and amber or warm white pulse-width signal are cut apart in time, made them at any constantly, only have at most one for effective drive level, LED driver module outputting drive voltage or electric current, drive corresponding light source module luminous, AC-DC power module is distributed to different light source modules in different time sections successively and use, light corresponding light source module.Prevented the conductings simultaneously of four light source modules, the power overload problem that causes power peak stack to bring, thereby in the present embodiment AC-DC power module power configuration just can be reduced to employing prior art AC-DC power module 1/4th.Reducing of AC-DC power module power, means that its volume and weight all reduces, and has saved volume and the cost of LED lighting device.
Fig. 1 is a kind of embodiment schematic diagram of LED lighting device of the present invention.
In the present embodiment, as shown in Figure 1, LED lighting device of the present invention comprises: AC-DC power module 1, LED driver module 2, time division multiplexing control module 3, light source module 4.Adopt time division multiplexing scheme, use constant current drive mode, drive the light source module of RGB+WW compound mode.
AC-DC power module 1 meets live wire end L, the zero line side N of utility grid, and as Alternating Current Power Supply, output is direct current, wherein V
dCfor DC power supply anode, GND is DC power supply negative terminal.DC power supply is connected with time division multiplexing control module 3 with LED driver module 2, is they power supplies.
LED driver module 2 is connected with the DC power supply of AC-DC power module 1 output, with power module anode V
dC, negative terminal GND connects, power module is the power supply of LED driver module.
In the present embodiment, LED driver module 2 comprises a LED constant current driving unit 201 and four switching tube K1, K2, K3, K4.LED constant current driving unit 201 is a constant-current source with short-circuit protection.Four switching tube K1, K2, K3, K4 connect with red, green, blueness and warm white light source module D1, D2, D3, D4 respectively, are connected to the output of LED constant current driving unit 201; The control end of four switching tube K1, K2, K3, K4 meets respectively redness, green, blueness and warm white pulse-width signal PWM1, PWM2, PWM3, PWM4, switching tube, when corresponding pulse-width signal is effective drive level, is lighted corresponding light source module.In the present embodiment, high level is effective drive level.
In the present embodiment, four switching tube K1, K2, K3, K4 are power-type switching device, can be N-type metal-oxide-semiconductors, or NPN type BJT pipe.In the present embodiment, adopt common anode utmost point connected mode, the positive output end LED+ of LED constant current driving unit 201 is connected with the positive pole of four light source modules, the negative output terminal LED-of LED constant current driving unit 201 is connected with source electrode or the emitter of four switching tube K1, K2, K3, K4, and drain electrode or the collector electrode of four switching tube K1, K2, K3, K4 are connected with the negative pole of four light source modules respectively again.The grid of switching tube or base stage are connected with corresponding pulse-width signal as control end.When pulse-width signal is high level, the grid of switching tube or base signal are high level, switching tube conducting, corresponding light source module is lighted, and when pulse-width signal is low level at that time, the grid of switching tube or base signal are low level, switching tube turn-offs, and corresponding light source module extinguishes.
Redness, green, blueness and warm white light source module D1, D2, D3, D4 form light source module 4.
In the present embodiment, in time division multiplexing control module, there are communications interface unit 301, signal processing unit 302 and time multiplexing signal output unit 303.Time multiplexing signal output unit 303 has four digital signal interfaces, export respectively four groups of pulse-width signal PWM1, PWM2, PWM3, PWM4 to the control end of four switching tube K1, K2, K3, K4, the i.e. base stage of the grid of switching tube N-type metal-oxide-semiconductor or NPN type BJT pipe.When a certain road light source module control signal is high level, be attached thereto the switching tube conducting connecing, switching tube drives corresponding light source module luminous.
By communication interface 301, redness is directly set, green, the time that blueness and warm white are lighted separately in one-period, signal processing unit 302 is lighted the time according to these four, control time multiplexing signal output unit 303 output four groups of cycles identical and only have at most one for the pulse-width signal PWM1 of significant level at synchronization, PWM2, PWM3, PWM4, control respectively four switching tube K1, K2, K3, the conducting of K4 and turn-off time, in order to control the redness of light source module group unit 4, green, blue with warm white light source module D1, D2, D3, D4 lights and the fall time.Regulate lighting and the fall time of four light source modules, just can regulate the colour mixture ratio of four kinds of light source modules, just can realize brightness regulation, color adjustment, colour temperature adjusting.
Fig. 2 is the another kind of embodiment schematic diagram of LED lighting device of the present invention.
In the present embodiment, as shown in Figure 2, LED lighting device of the present invention comprises: AC-DC power module 1, LED driver module 2, time division multiplexing control module 3, light source module 4.Adopt time division multiplexing scheme, use constant voltage type of drive, drive the light source module of RGBA compound mode.
AC-DC power module 1 meets live wire end L, the zero line side N of utility grid, and as Alternating Current Power Supply, output is direct current, wherein V
dCfor DC power supply anode, GND is DC power supply negative terminal.DC power supply is connected with light source module 4 with time division multiplexing control module 3, is they power supplies.
In the present embodiment, LED driver module 2 comprises four switching tube K1, K2, K3, K4.Four switching tube K1, K2, K3, K4 connect with red, green, blueness and amber light source module D1, D2, D3, D4 respectively; The control end of four switching tube K1, K2, K3, K4 connects respectively redness, green, blueness and amber pulse-width signal, and switching tube, when corresponding pulse-width signal is effective drive level, is lighted corresponding light source module.In the present embodiment, high level is effective drive level.
In the present embodiment, four switching tube K1, K2, K3, K4 are power-type switching device, can be N-type metal-oxide-semiconductors, or NPN type BJT pipe.In the present embodiment, adopt common anode utmost point connected mode, AC-DC power module 1 positive output end V
dCbe connected with the positive pole of each light source module, AC-DC power module 1 negative output terminal GND is connected with source electrode or the emitter of four switching tube K1, K2, K3, K4, and drain electrode or the collector electrode of four switching tube K1, K2, K3, K4 are connected with the negative pole of four light source modules respectively again.The grid of switching tube or base stage are connected with corresponding pulse-width signal as control end.When pulse-width signal is high level, the grid of switching tube or base signal are high level, switching tube conducting, corresponding light source module is lighted, and when pulse-width signal is low level at that time, the grid of switching tube or base signal are low level, switching tube turn-offs, and corresponding light source module extinguishes.
Redness, green, blueness and amber light source module D1, D2, D3, D4 form light source module 4.
In the present embodiment, in time division multiplexing control module, there are communications interface unit 301, signal processing unit 302 and time multiplexing signal output unit 303.Time multiplexing signal output unit 303 has four digital signal interfaces, export respectively four groups of pulse-width signal PWM1, PWM2, PWM3, PWM4 to the control end of four switching tube K1, K2, K3, K4, the i.e. base stage of the grid of switching tube N-type metal-oxide-semiconductor or NPN type BJT pipe.When a certain road light source module control signal is high level, be attached thereto the switching tube conducting connecing, switching tube drives corresponding light source module luminous.
By communication interface 301, redness is directly set, green, blue and the amber time of lighting separately in one-period, signal processing unit 302 is lighted the time according to these four, control time multiplexing signal output unit 303 output four groups of cycles identical and only have at most one for the pulse-width signal PWM1 of significant level at synchronization, PWM2, PWM3, PWM4, control respectively four switching tube K1, K2, K3, the conducting of K4 and turn-off time, in order to control the redness of light source module group unit 4, green, blue with amber light source module D1, D2, D3, D4 lights and the fall time.Regulate lighting and the fall time of four light source modules, just can regulate the colour mixture ratio of four kinds of light source modules, just can realize brightness regulation, color adjustment, colour temperature adjusting.
Fig. 3 is pulse-width signal one sequential chart of the time multiplexing signal output interface output shown in Fig. 1.
In one-period T, first time period t 1, pulse-width signal PWM1 is high level, other three signals are low level; Second time period t 2, pulse-width signal PWM2 is high level, other three signals are low level; The 3rd time period t 3, pulse-width signal PWM3 is high level, other three signals are low level; The 4th time period t 4, pulse-width signal PWM4 is high level, other three signals are low level.T1, t2, t3, tetra-sections of time sums of t4 are T, are fixed time periods.The time length of this clock cycle T, time period t 1, time period t 2, time period t 3, time period t 4 is subject to the control of signal processing unit 302.In any one time period of one-period T, in signal PWM1, PWM2, PWM3, PWM4, only has at most one in high level, other three signals are in low level, like this, at any time, only have at most a switching tube conducting, 4 li of light source module group units only have at most a light source module to light.
Fig. 4 is another sequential chart of pulse-width signal of the time multiplexing signal output interface output shown in Fig. 1.
In Fig. 4, added Dead Time t0.Dead Time t0 adds, and can effectively avoid causing due to the time delay of switching tube conducting and shutoff the problem of a plurality of switching tubes conducting simultaneously.In any one time period of one-period T, in signal PWM1, PWM2, PWM3, PWM4, only has at most one in high level, other three signals are in low level, like this, at any time, only have at most a switching tube conducting, thereby 4 li of light source modules only have at most a light source module group unit to light.
Time division multiplexing control mode has avoided a plurality of light source modules to light simultaneously, causes the problem of power stack.The allocating power of AC-DC power module is that 1/4th, four light source modules of traditional approach only need a LED driver element, and driver element quantity is to be also 1/4th of traditional approach, has saved widely the cost of power supply changeover device, has reduced volume.Meanwhile, adopt red, green, blue and amber or warm white light source module scheme, realized brightness regulation, color adjustment, colour temperature adjusting, both met sight illumination, met again function lighting.
Light source module control signal pwm signal of the present invention adopts positive logic, take high level as effective drive level, drive red, green, blue and amber or warm white light source module is luminous, the present invention also can employing negative logic, or the mode of mixed logic mixing, realize the control of power output peak value complementation.Similarly, also can adopt P type metal-oxide-semiconductor or positive-negative-positive BJT pipe as switching tube.
Although above the illustrative embodiment of the present invention is described; so that those skilled in the art understand 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 definite the spirit and scope of the present invention in, these variations are apparent, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (2)
1. a LED lighting device, comprising:
Red, green, blue-light source module;
One AC-DC power module, is connected with civil power AC network, for alternating current is converted to direct current;
One LED driver module, is connected with the direct current of AC-DC power module output, and AC-DC power module provides DC power supply for LED driver module, and LED driver module is used for lighting and extinguishing of driving light source module;
One control module, the redness that its output duty cycle is adjustable, green, blue three groups of pulse-width signals are to LED driver module, regulate respectively LED driver module to export to redness, green, the drive current of blue-light source module or the duty ratio of voltage, thereby regulate the lighting colour of LED lighting device;
It is characterized in that,
Wherein, described LED lighting device also comprises: amber light source module, control module is exported the adjustable amber pulse-width signal of one group of duty ratio to LED driver module, regulate LED driver module to export to the duty ratio of drive current or the voltage of amber light source module, thereby regulate the illumination colour temperature of LED lighting device
Wherein, described LED driver module comprises a LED constant current driving unit and four switching tubes, described LED constant current driving unit is a constant-current source with short-circuit protection, described four switching tubes respectively with redness, green, blue and amber or warm white light source module is connected, be connected to the output of LED constant current driving unit, the control end of four switching tubes connects respectively redness, green, blue and amber or warm white pulse-width signal, switching tube is when corresponding pulse-width signal is effective drive level, corresponding light source module is lighted, and described effective drive level is high level,
Wherein, described control module adopts time division multiplexing control module, described time division multiplexing module comprises communications interface unit, signal processing unit and time multiplexing signal output unit, by described communications interface unit, redness is directly set, green, the time blue and amber or warm white is lighted separately in one-period, described signal processing unit is controlled described time multiplexing signal output unit according to this four times of lighting, and to export four groups of cycles identical and only have at most one for the pulse-width signal of effective drive level at synchronization, drive corresponding light source module to light, and by regulating the colour mixture ratio that regulates four groups of light source modules with the fall time of lighting of four light source modules, thereby realize brightness regulation, color adjustment and/or colour temperature regulate,
Wherein, cycle T is divided into four time periods (t1, t2, t3, t4), the time length of cycle T and four time periods (t1, t2, t3, t4) is controlled by described signal processing unit, within any one time period of cycle T, only have a high level pulse-width signal and three low-level pulse width modulation signals, LED driver module outputting drive voltage or electric current, drive corresponding light source module luminous, AC-DC power module is distributed to different light source modules in the different time periods successively to be used, light corresponding light source module, and
Each time period of cycle T has all added Dead Time t0.
2. LED lighting device according to claim 1, it is characterized in that, LED constant current driving unit, four switching tubes and redness, green, blueness and amber light source module adopt common anode utmost point connected mode, the positive output end of LED constant current driving unit is connected with the positive pole of each light source module, the negative output terminal of LED constant current driving unit is connected with one end of four switching tubes, and the other end of four switching tubes is connected with the negative pole of each light source module respectively again.
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| CN201110273159.7A CN102316648B (en) | 2011-09-15 | 2011-09-15 | Light-emitting diode (LED) illuminating device |
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| CN201110273159.7A CN102316648B (en) | 2011-09-15 | 2011-09-15 | Light-emitting diode (LED) illuminating device |
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| CN105917746A (en) * | 2014-03-28 | 2016-08-31 | Ccs株式会社 | Power supply device and led lighting device |
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| CN102316648A (en) | 2012-01-11 |
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Address after: The new 611731 Chengdu Road, Sichuan province high tech Zone No. 2 Applicant after: Sichuan Sunfor Light Co., Ltd. Address before: The new 611731 Chengdu Road, Sichuan province high tech Zone No. 2 Applicant before: Sichuan Sunfor Lighting Co., Ltd. |
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Denomination of invention: LED lighting device Effective date of registration: 20150529 Granted publication date: 20140813 Pledgee: Chengdu hi tech Zone Kun Kun micro loan Co., Ltd. Pledgor: Sichuan Sunfor Light Co., Ltd. Registration number: 2015510000022 |
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