CN103068127A - Light-emitting diode (LED) lamp and bicolor LED adjustable light circuit - Google Patents
Light-emitting diode (LED) lamp and bicolor LED adjustable light circuit Download PDFInfo
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- CN103068127A CN103068127A CN2013100020208A CN201310002020A CN103068127A CN 103068127 A CN103068127 A CN 103068127A CN 2013100020208 A CN2013100020208 A CN 2013100020208A CN 201310002020 A CN201310002020 A CN 201310002020A CN 103068127 A CN103068127 A CN 103068127A
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Abstract
The invention belongs to the technical field of lighting, and particularly relates to a light-emitting diode (LED) lamp and a bicolor LED adjustable light circuit. The bicolor LED adjustable light circuit can be installed outside the LED lamp or inside the LED lamp and comprises a Pulse-Width Modulation (PWM) control unit, an LED control unit and a constant current unit. By adding the bicolor LED adjustable light circuit at the front end of an LED lamp with two colors, two power lines are enabled to produce opposite polarity of positive and negative voltage, the LED lamp with two different colors is lightened, so that the dimming and toning of the bicolor LED on the two power lines are achieved, the circuit structure is simple, the achievement is easy, and the cost is low.
Description
Technical field
The invention belongs to lighting technical field, relate in particular to a kind of LED light fixture and two-color LED dimming circuit.
Background technology
LED is as the semiconductor illuminating light source of a new generation, has that power consumption is little, luminous efficiency is high, the life-span is long and the series of advantages such as controllability is strong.Generally will be on the basis of pure use LED, the access control module satisfies the demand of intelligent lighting, and can reach better energy-saving effect.In various lighting environments, select diversified light color mutually to arrange in pairs or groups according to the layout difference of scene.And the LED that lights a kind of color just needs to connect two power lines of positive and negative electrode usually, if the LED of multiple color collocation, then need to connect many times power line, increased so on the one hand the application cost of LED, the range of application of LED is restricted.
Summary of the invention
Purpose of the present invention at first is to provide a kind of light adjusting circuit of dual-colored LED, is intended to solve in the prior art dual-colored LED and need to controls, realize the technical problem that cost is higher by four power lines.
To achieve these goals, the technical solution used in the present invention is:
A kind of light adjusting circuit of dual-colored LED, connect described dual-colored LED by two power lines, described dual-colored LED is formed in parallel by LED1 and the LED2 of two kinds of colors, the positive pole of described LED1 connects negative pole and first power line of described LED2 simultaneously, the negative pole of described LED1 connects positive pole and second power line of described LED2 simultaneously, and described light adjusting circuit comprises:
The PWM control unit is used for external voltage being converted into operating voltage and exporting two groups of pwm signals;
The LED control unit comprises the LED control branch road and the 2nd LED control branch road that are connected with described PWM control unit respectively, is used for according to described two groups of pwm signals the break-make of described LED1, LED2 being controlled respectively; And
The constant current control unit is used for keeping when described LED1, LED2 conducting current stabilization constant.
The present invention also aims to provide a kind of LED light fixture, described light fixture comprises the dual-colored LED that is formed in parallel by the LED1 of two kinds of colors and LED2, and, described light fixture comprises the light adjusting circuit of aforesaid dual-colored LED, the positive pole of described LED1 connects negative pole and first power line of described LED2 simultaneously, and the negative pole of described LED1 connects positive pole and second power line of described LED2 simultaneously.
The invention provides a kind of LED light fixture and two-color LED dimming circuit, the two-color LED dimming circuit can be installed in LED light fixture outside or be built in LED light fixture the inside.By increasing a two-color LED dimming circuit at the LED of two kinds of colors lamp front end, make and produce the opposite voltage of positive-negative polarity on two power lines, to light the LED lamp of two kinds of different colours, thereby be implemented in light modulation and the toning of dual-colored LED on two power lines, circuit structure is simple, and it is lower to be easy to realization and cost.
Description of drawings
Fig. 1 is the module frame chart of two-color LED dimming circuit provided by the invention;
Fig. 2 is the example electronic devices and components figure of the two-color LED dimming circuit that provides of one embodiment of the invention;
Fig. 3 is the example electronic devices and components figure of the two-color LED dimming circuit that provides of another embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 is the module frame chart of two-color LED dimming circuit provided by the invention; For convenience of explanation, only show part related to the present invention, as shown in the figure:
A kind of two-color LED dimming circuit 10, connect dual-colored LED 20 by two power lines, dual-colored LED 20 is formed in parallel by LED1 and the LED2 of two kinds of colors, the positive pole of LED1 connects negative pole and first power line of LED2 simultaneously, the negative pole of LED1 connects positive pole and second power line of LED2 simultaneously, as seen from the figure, light adjusting circuit 10 comprises: PWM control unit 110, LED control unit 120 and constant current control unit 130;
Wherein, PWM control unit 110 is used for external voltage being converted into operating voltage and exporting two groups of pwm signals; LED control unit 120 comprises LED control branch road 121 and the 2nd LED control branch road 122, is used for according to two groups of pwm signals of PWM control unit 110 outputs the break-make of LED1, LED2 being controlled; Constant current control unit 130 is used for keeping when LED1, LED2 conducting current stabilization constant, guarantees the light effect.
When specific implementation, PWM control unit 110 comprises that interconnective power supply conversion branch road 111 and pwm signal produce branch road 112;
Power supply conversion branch road 111 is used for voltage transitions with the outside input and becomes the required operating voltage VCC of dual-colored LED 20, and produces branch road 112 power supplies to pwm signal; Pwm signal produces the adjustable pwm signal of branch road 112 outputs two group pulse Widths to described LED control unit, so that described LED1 and/or LED2 conducting are luminous.As a preferred embodiment of the present invention, when one group of output pwm signal, another group is output low level (such as 0V) signal directly, so that the LED conducting of a certain color is luminous, can realize dimming function to LED by the pulse width ratio of regulating pwm signal simultaneously, the function of the also light modulation that namely realizes both having mixed colours.
As a preferred embodiment of the present invention, LED control branch road 121 and the 2nd LED control branch road 122 can be comprised of three switching tubes and a resistance respectively;
Particularly, LED control branch road 121 comprises the first switching tube, second switch pipe, the 5th switching tube and resistance R 1; The control termination pwm signal of the first switching tube produces the first output of branch road 112, the hot end of the first switching tube meets operating voltage VCC by resistance R 1, the high potential termination operating voltage VCC of the 5th switching tube, the hot end of the first switching tube also connects the control end of second switch pipe and the control end of the 5th switching tube simultaneously, the public connecting end of the cold end of the 5th switching tube and second switch pipe hot end connects first power line, and the cold end of the cold end of the first switching tube and second switch pipe is ground connection all;
The 2nd LED control branch road 122 comprises the 3rd switching tube, the 4th switching tube, the 6th switching tube and resistance R 2; The control termination pwm signal of the 3rd switching tube produces the second output of branch road 112, the hot end of the 3rd switching tube meets operating voltage VCC by resistance R 2, the hot end of the 6th switching tube also meets operating voltage VCC, the hot end of the 3rd switching tube also connects the control end of the 4th switching tube and the control end of the 6th switching tube simultaneously, the cold end that the public connecting end of the cold end of the 6th switching tube and the 4th switching tube hot end connects the cold end of constant current control unit 130, the three switching tubes and the 4th switching tube is ground connection all.
Fig. 2 is the example electronic devices and components figure of the two-color LED dimming circuit that provides of one embodiment of the invention; For convenience of explanation, only show the part relevant with present embodiment, as shown in the figure:
In the present embodiment, the first switching tube in the LED control unit 120, second switch pipe, the 3rd switching tube and the 4th switching tube are respectively NPN type triode Q1, Q2, Q3 and Q4, the base stage of NPN type triode Q1-Q4 is respectively the control end of the first to the 4th switching tube, the collector electrode of NPN type triode Q1-Q4 is respectively the hot end of the first to the 4th switching tube, and the emitter of NPN type triode Q1-Q4 is respectively the cold end of the first to the 4th switching tube; The 5th switching tube, the 6th switching tube are respectively positive-negative-positive triode Q5, Q6, the base stage of positive-negative-positive triode Q5, Q6 is respectively the control end of the 5th switching tube, the 6th switching tube, the emitter of positive-negative-positive triode Q5, Q6 is respectively the hot end of the 5th switching tube, the 6th switching tube, and the collector electrode of positive-negative-positive triode Q5, Q6 is respectively the cold end of the 5th switching tube, the 6th switching tube.
Particularly, control branch road 121 for a LED: the base stage of NPN type triode Q1 connects the first output that pwm signal produces branch road 112, the collector electrode of NPN type triode Q1 meets operating voltage VCC by resistance R 1, the emitter operating voltage VCC of positive-negative-positive triode Q5, the collector electrode of NPN type triode Q1 also connects the base stage of NPN type triode Q2 and the base stage of positive-negative-positive triode Q5 simultaneously, the public connecting end of the collector electrode of the collector electrode of positive-negative-positive triode Q5 and NPN type triode Q2 connects first power line, and the emitter of the emitter of NPN type triode Q1 and NPN type triode Q2 is ground connection all;
For the 2nd LED control branch road 122, the base stage of NPN type triode Q3 connects the second output that pwm signal produces branch road 112, the collector electrode of NPN type triode Q3 meets operating voltage VCC by resistance R 2, the emitter operating voltage VCC of positive-negative-positive triode Q6, the collector electrode of NPN type triode Q3 also connects the base stage of NPN type triode Q4 and the base stage of positive-negative-positive triode Q6 simultaneously, the public connecting end of the collector electrode of the collector electrode of positive-negative-positive triode Q6 and NPN type triode Q4 connects constant current control unit 130, and the emitter of the emitter of NPN type triode Q3 and NPN type triode Q4 is ground connection all.
In the present embodiment, constant current control unit 130 is adjustable resistance RI, the public connecting end of the collector electrode of the first termination positive-negative-positive triode Q6 of adjustable resistance RI and the collector electrode of NPN type triode Q4, second power line of the second termination of adjustable resistance RI.Needing ben is that constant current control unit 130 also can be other circuit such as constant current chip when specific implementation.As long as keep current stabilization constant in the time of can being implemented in LED1, LED2 conducting, guarantee that the electric circuit constitute of LED1 and LED2 light effect all is included within the scope of constant current control unit 130.
In the present embodiment, when triode Q1, Q2 and Q5 conducting, the LED1 forward conduction is luminous, and when triode Q3, Q4 and Q6 conducting, the LED2 forward conduction is luminous.Control the turn-on and turn-off of above-mentioned each triode by two groups of pwm signals of pwm signal generation branch road 112 outputs; And adjustable resistance RI keeps flowing through the size of current of LED when certain LED conducting constant, realizes stable light modulation, the function of toning with control two-color LED dimming circuit.
Fig. 3 is the example electronic devices and components figure of the two-color LED dimming circuit that provides of another embodiment of the present invention, only is the composition of LED control unit 120 with embodiment difference shown in Figure 2.In the present embodiment, switching tube in the LED control unit 120 is metal-oxide-semiconductor, wherein the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube are NMOS pipe K1, K2, K3 and K4, the grid of NMOS pipe K1-K4 is the control end of the first to the 4th switching tube, the drain electrode of NMOS pipe K1-K4 is the hot end of the first to the 4th switching tube, and the source electrode of NMOS pipe K1-K4 is the cold end of the first to the 4th switching tube; And the 5th switching tube, the 6th switching tube are respectively PMOS pipe K5, K6, the grid of PMOS pipe K5, K6 is respectively the control end of the 5th switching tube, the 6th switching tube, the source electrode of PMOS pipe K5, K6 is respectively the hot end of the 5th switching tube, the 6th switching tube, and the drain electrode of PMOS pipe K5, K6 is respectively the cold end of the 5th switching tube, the 6th switching tube.The concrete connected mode of each metal-oxide-semiconductor does not repeat them here as shown in the figure.
The embodiment of the invention also provides a kind of LED light fixture, comprise the dual-colored LED that LED1 and LED2 by two kinds of colors are formed in parallel, described LED1 and LED2 are comprised of one or many homochromy LED series/parallels respectively, LED conducting direction among the described LED1 is consistent, and the LED conducting direction among the described LED2 is consistent.Specifically, described light fixture comprises the light adjusting circuit of dual-colored LED as described above in Example.The two-color LED dimming circuit can be installed in LED light fixture outside or be built in LED light fixture the inside, make and produce the opposite voltage of positive-negative polarity on two power lines, lighting the LED lamp of two kinds of different colours, thereby be implemented in light modulation and the toning of dual-colored LED on two power lines.
The invention provides a kind of LED light fixture and two-color LED dimming circuit, the two-color LED dimming circuit can be installed in LED light fixture outside or be built in LED light fixture the inside.By increasing a two-color LED dimming circuit at the LED of two kinds of colors lamp front end, make and produce the opposite voltage of positive-negative polarity on two power lines, to light the LED lamp of two kinds of different colours, thereby be implemented in light modulation and the toning of dual-colored LED on two power lines, circuit structure is simple, and it is lower to be easy to realization and cost.
The above only is preferred embodiment of the present invention, not in order to limit the present invention, although with reference to previous embodiment the present invention has been carried out more detailed explanation, for a person skilled in the art, it still can be made amendment or part technical characterictic wherein is equal to replacement the technical scheme that aforementioned each embodiment puts down in writing.All any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the light adjusting circuit of a dual-colored LED, connect described dual-colored LED by two power lines, described dual-colored LED is formed in parallel by LED1 and the LED2 of two kinds of colors, the positive pole of described LED1 connects negative pole and first power line of described LED2 simultaneously, the negative pole of described LED1 connects positive pole and second power line of described LED2 simultaneously, it is characterized in that described light adjusting circuit comprises:
The PWM control unit is used for external voltage being converted into operating voltage and exporting two groups of pwm signals;
The LED control unit comprises the LED control branch road and the 2nd LED control branch road that are connected with described PWM control unit respectively, is used for according to described two groups of pwm signals the break-make of described LED1, LED2 being controlled respectively; And
The constant current control unit is used for keeping when described LED1, LED2 conducting current stabilization constant.
2. the light adjusting circuit of dual-colored LED as claimed in claim 1 is characterized in that, described PWM control unit comprises that interconnective power supply conversion branch road and pwm signal produce branch road;
Described power supply conversion branch road is used for the voltage transitions of outside input is become the required operating voltage of described dual-colored LED, and produces the branch road power supply for described pwm signal; Described pwm signal produces branch road and exports the adjustable pwm signal of two group pulse Widths respectively to described LED control branch road and the 2nd LED control branch road, controls described LED1 and/or the LED2 conducting is luminous.
3. the light adjusting circuit of dual-colored LED as claimed in claim 1 or 2 is characterized in that, described LED control branch road and the 2nd LED control branch road are comprised of three switching tubes and a resistance respectively;
Described LED control branch road comprises the first switching tube, second switch pipe, the 5th switching tube and resistance R 1; The described pwm signal of the control termination of described the first switching tube produces the first output of branch road, the hot end of described the first switching tube connects operating voltage by described resistance R 1, the described operating voltage of high potential termination of described the 5th switching tube, the hot end of described the first switching tube also connects the control end of described second switch pipe and the control end of the 5th switching tube simultaneously, the public connecting end of the cold end of described the 5th switching tube and described second switch pipe hot end connects described first power line, and the cold end of the cold end of described the first switching tube and described second switch pipe is ground connection all;
Described the 2nd LED control branch road comprises the 3rd switching tube, the 4th switching tube, the 6th switching tube and resistance R 2; The described pwm signal of the control termination of described the 3rd switching tube produces the second output of branch road, the hot end of described the 3rd switching tube connects operating voltage by described resistance R 2, the hot end of described the 6th switching tube also connects described operating voltage, the hot end of described the 3rd switching tube also connects the control end of described the 4th switching tube and the control end of the 6th switching tube simultaneously, the public connecting end of the cold end of described the 6th switching tube and described the 4th switching tube hot end connects described constant current control unit, and the cold end of the cold end of described the 3rd switching tube and described the 4th switching tube is ground connection all.
4. the light adjusting circuit of dual-colored LED as claimed in claim 3 is characterized in that:
Described the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube are NPN type triode, the base stage of NPN type triode is the control end of the first to the 4th switching tube, the current collection of NPN type triode is the hot end of the first to the 4th switching tube very, and the emission of NPN type triode is the cold end of the first to the 4th switching tube very;
Described the 5th switching tube, the 6th switching tube are the positive-negative-positive triode, the base stage of positive-negative-positive triode is the control end of the 5th, the 6th switching tube, the emission of positive-negative-positive triode is the hot end of the 5th, the 6th switching tube very, and the current collection of positive-negative-positive triode is the cold end of the 5th, the 6th switching tube very.
5. the light adjusting circuit of dual-colored LED as claimed in claim 3 is characterized in that:
Described the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube are the NMOS pipe, the grid of NMOS pipe is the control end of the first to the 4th switching tube, the drain electrode of NMOS pipe is the hot end of the first to the 4th switching tube, and the source electrode of NMOS pipe is the cold end of the first to the 4th switching tube;
Described the 5th switching tube, the 6th switching tube are the PMOS pipe, and the grid of PMOS pipe is the control end of the 5th, the 6th switching tube, and the source electrode of PMOS pipe is the hot end of the 5th, the 6th switching tube, and the drain electrode of PMOS pipe is the cold end of the 5th, the 6th switching tube.
6. such as the light adjusting circuit of each described dual-colored LED of claim 3-5, it is characterized in that: described constant current control unit comprises adjustable resistance RI, and described adjustable resistance RI is serially connected between the public connecting end and second power line of the cold end of described the 6th switching tube and described the 4th switching tube hot end.
7. LED light fixture, comprise the dual-colored LED that LED1 and LED2 by two kinds of colors are formed in parallel, it is characterized in that, described light fixture comprises the light adjusting circuit such as each described dual-colored LED of claim 1-6, the positive pole of described LED1 connects negative pole and first power line of described LED2 simultaneously, and the negative pole of described LED1 connects positive pole and second power line of described LED2 simultaneously.
8. LED light fixture as claimed in claim 7 is characterized in that, described LED1 and LED2 are comprised of one or many homochromy LED series/parallels respectively, and the LED conducting direction among the described LED1 is consistent, and the LED conducting direction among the described LED2 is consistent.
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| CN201310002020.8A CN103068127B (en) | 2013-01-05 | 2013-01-05 | A kind of LED lamp and two-color LED dimming circuit |
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| CN201310002020.8A CN103068127B (en) | 2013-01-05 | 2013-01-05 | A kind of LED lamp and two-color LED dimming circuit |
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| CN103068127A true CN103068127A (en) | 2013-04-24 |
| CN103068127B CN103068127B (en) | 2015-07-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104582189A (en) * | 2015-01-15 | 2015-04-29 | 魏泽科 | Intelligent light dimming and color adjusting LED isolation drive circuit |
| CN105228295A (en) * | 2015-09-14 | 2016-01-06 | 浙江图讯科技股份有限公司 | Safety of Coal Mine Production based on Internet of Things LED intelligent illumination system |
| CN106504709A (en) * | 2016-11-18 | 2017-03-15 | 全椒县志宏机电设备设计有限公司 | A kind of display device and back light source brightness control circuit |
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| CN202143265U (en) * | 2011-07-12 | 2012-02-08 | 科博达技术有限公司 | LED lamp controller based on digit PWM control technique |
| CN203151800U (en) * | 2013-01-05 | 2013-08-21 | 深圳市泓亚光电子有限公司 | LED luminaire and bi-color LED dimming circuit |
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| CN101336026A (en) * | 2008-07-11 | 2008-12-31 | 北京巨数数字技术开发有限公司 | LED light-emitting component of integrated single line control apparatus |
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| CN104582189A (en) * | 2015-01-15 | 2015-04-29 | 魏泽科 | Intelligent light dimming and color adjusting LED isolation drive circuit |
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| CN103068127B (en) | 2015-07-29 |
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Address after: Buji street, Longgang District of Shenzhen city cloth Lan Road 518000 Guangdong province No. 135 Gan Li six road No. 9 Patentee after: Shenzhen Hoyol Opto Electronic Co., Ltd. Address before: 518000, Gan Li Science Park, 135 Shenzhen Road, Buji street, Longgang District, Guangdong, China Patentee before: Hongya Photoelectronics Co., Ltd., Shenzhen City |
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Effective date of registration: 20190903 Address after: 518000 Hongfa Innovation Park, Bamboo Corner, Jiuwei Community, Hangcheng Street, Baoan District, Shenzhen City, Guangdong Province, 2 buildings and 5 floors Patentee after: Shenzhen Gongya Wisdom Electronics Co., Ltd. Address before: 518000 No. 135 Bulan Road, Buji Street, Longgang District, Shenzhen City, Guangdong Province - No. 9 Ganli Sixth Road Patentee before: Shenzhen Hoyol Opto Electronic Co., Ltd. |
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