CN103068127B - A kind of LED lamp and two-color LED dimming circuit - Google Patents
A kind of LED lamp and two-color LED dimming circuit Download PDFInfo
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- CN103068127B CN103068127B CN201310002020.8A CN201310002020A CN103068127B CN 103068127 B CN103068127 B CN 103068127B CN 201310002020 A CN201310002020 A CN 201310002020A CN 103068127 B CN103068127 B CN 103068127B
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Abstract
The invention belongs to lighting technical field, particularly relate to a kind of LED lamp and two-color LED dimming circuit.Two-color LED dimming circuit can be arranged on outside LED lamp or be built in inside LED lamp, comprises PWM control unit, LED control unit and constant-current control unit.By increasing a two-color LED dimming circuit in the LED front end of two kinds of colors, make two power lines produce the contrary voltage of positive-negative polarity, to light the LED of two kinds of different colours, thus realize light modulation and the toning of dual-colored LED on two power lines, circuit structure is simple, is easy to realize and cost is lower.
Description
Technical field
The invention belongs to lighting technical field, particularly relate to a kind of LED lamp and two-color LED dimming circuit.
Background technology
LED, 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 on the pure basis using LED, access control module meets the demand of intelligent lighting, and can reach energy-saving effect better.In various lighting environment, diversified light color be selected mutually to arrange in pairs or groups according to the layout difference of scene.And the LED lighting a kind of color just needs to connect positive and negative electrode two power lines usually, if the LED collocation of multiple color, then need the power line connecting many times, add the application cost of LED so on the one hand, also make the range of application of LED be restricted on the other hand.
Summary of the invention
First object of the present invention is the light adjusting circuit providing a kind of dual-colored LED, and being intended to solve dual-colored LED in prior art needs to be undertaken controlling, realizing the higher technical problem of cost 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, described dual-colored LED is connected by two power lines, described dual-colored LED is formed in parallel by LED1 and 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:
PWM control unit, for being converted into operating voltage by external voltage and exporting two groups of pwm signals;
LED control unit, comprises the LED controlling brancher and the 2nd LED controlling brancher that are connected with described PWM control unit respectively, for controlling according to the break-make of described two groups of pwm signals to described LED1, LED2 respectively; And
Constant-current control unit, for keeping when described LED1, LED2 conducting current stabilization constant.
The present invention also aims to provide a kind of LED lamp, described light fixture comprises the dual-colored LED be formed in parallel by LED1 and LED2 of two kinds of colors, and, described light fixture comprises the light adjusting circuit of dual-colored LED as above, 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 lamp and two-color LED dimming circuit, two-color LED dimming circuit can be arranged on outside LED lamp or be built in inside LED lamp.By increasing a two-color LED dimming circuit in the LED front end of two kinds of colors, make two power lines produce the contrary voltage of positive-negative polarity, to light the LED of two kinds of different colours, thus realize light modulation and the toning of dual-colored LED on two power lines, circuit structure is simple, is easy to realize and cost is lower.
Accompanying drawing explanation
Fig. 1 is the module frame chart of two-color LED dimming circuit provided by the invention;
Fig. 2 is the exemplary electron components and parts figure of the two-color LED dimming circuit that one embodiment of the invention provides;
Fig. 3 is the exemplary electron components and parts figure of the two-color LED dimming circuit that another embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, 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, be 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, illustrate only part related to the present invention, as shown in the figure:
A kind of two-color LED dimming circuit 10, dual-colored LED 20 is connected by two power lines, dual-colored LED 20 is formed in parallel by LED1 and 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 for being converted into operating voltage by external voltage and exporting two groups of pwm signals; LED control unit 120 comprises a LED controlling brancher 121 and the 2nd LED controlling brancher 122, controls for the break-make of two groups of pwm signals to LED1, LED2 exported according to PWM control unit 110; Constant-current control unit 130, for keeping when LED1, LED2 conducting current stabilization constant, ensures light effect.
When specific implementation, PWM control unit 110 comprises interconnective Power convert branch road 111 and pwm signal produces branch road 112;
Power convert branch road 111 becomes the operating voltage VCC needed for dual-colored LED 20 for the voltage transitions inputted outside, and powers to pwm signal generation branch road 112; Pwm signal produces branch road 112 and exports two group pulse width than adjustable pwm signal to described LED control unit, makes described LED1 and/or LED2 conducting luminous.As a preferred embodiment of the present invention, when one group of output pwm signal, another group can direct output low level (such as 0V) signal, make the LED conducting of a certain color luminous, dimming function simultaneously by regulating the pulse width ratio of pwm signal can realize LED, the function of the also light modulation that namely realizes both having mixed colours.
As a preferred embodiment of the present invention, a LED controlling brancher 121 and the 2nd LED controlling brancher 122 can be made up of three switching tubes and a resistance respectively;
Specifically, a LED controlling brancher 121 comprises the first switching tube, second switch pipe, the 5th switching tube and resistance R1; 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 R1, 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 cold end of the 5th switching tube and the public connecting end of second switch pipe hot end connect first power line, the cold end of the first switching tube and cold end all ground connection of second switch pipe;
2nd LED controlling brancher 122 comprises the 3rd switching tube, the 4th switching tube, the 6th switching tube and resistance R2; 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 R2, 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 of the 6th switching tube and the public connecting end of the 4th switching tube hot end connect constant-current control unit 130, the cold end of the 3rd switching tube and cold end all ground connection of the 4th switching tube.
Fig. 2 is the exemplary electron components and parts figure of the two-color LED dimming circuit that one embodiment of the invention provides; For convenience of explanation, illustrate only part related to the present embodiment, as shown in the figure:
In the present embodiment, the first switching tube in 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 four switching tube, the collector electrode of NPN type triode Q1-Q4 is respectively the hot end of the first to the four switching tube, and the emitter of NPN type triode Q1-Q4 is respectively the cold end of the first to the four switching tube; 5th switching tube, the 6th switching tube are respectively PNP type triode Q5, Q6, the base stage of PNP type triode Q5, Q6 is respectively the control end of the 5th switching tube, the 6th switching tube, the emitter of PNP type triode Q5, Q6 is respectively the hot end of the 5th switching tube, the 6th switching tube, and the collector electrode of PNP type triode Q5, Q6 is respectively the cold end of the 5th switching tube, the 6th switching tube.
Specifically, base stage for LED controlling brancher 121: a 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 R1, the emitter operating voltage VCC of PNP type 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 PNP type triode Q5 simultaneously, the public connecting end of the collector electrode of PNP type triode Q5 and the collector electrode of NPN type triode Q2 connects first power line, the emitter of NPN type triode Q1 and the emitter of NPN type triode Q2 all ground connection,
For the 2nd LED controlling brancher 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 R2, the emitter operating voltage VCC of PNP type 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 PNP type triode Q6 simultaneously, the public connecting end of the collector electrode of PNP type triode Q6 and the collector electrode of NPN type triode Q4 connects constant-current control unit 130, the emitter of NPN type triode Q3 and the emitter of NPN type triode Q4 all ground connection.
In the present embodiment, constant-current control unit 130 is adjustable resistance RI, the collector electrode of the first termination PNP type triode Q6 of adjustable resistance RI and the public connecting end of the collector electrode of NPN type triode Q4, the second termination second power line of adjustable resistance RI.Need ben, constant-current control unit 130 also can be other circuit such as constant current chip when specific implementation.As long as can realize keeping current stabilization constant when LED1, LED2 conducting, ensure that the circuit composition of LED1 and LED2 light effect is all included within the scope of constant-current control unit 130.
In the present embodiment, when triode Q1, Q2 and Q5 conducting, LED1 forward conduction is luminous, and when triode Q3, Q4 and Q6 conducting, LED2 forward conduction is luminous.The two groups of pwm signals exported by pwm signal generation branch road 112 control the turn-on and turn-off of each triode above-mentioned; And adjustable resistance RI keeps flow through LED size of current when certain LED conducting is constant, to control the function of the stable light modulation of two-color LED dimming circuit realiration, toning.
Fig. 3 is the exemplary electron components and parts figure of the two-color LED dimming circuit that another embodiment of the present invention provides, and is only the composition of LED control unit 120 with the embodiment difference shown in Fig. 2.In the present embodiment, switching tube in 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 tube K1, K2, K3 and K4, the grid of NMOS tube K1-K4 is the control end of the first to the four switching tube, the drain electrode of NMOS tube K1-K4 is the hot end of the first to the four switching tube, and the source electrode of NMOS tube K1-K4 is the cold end of the first to the four switching tube; And the 5th switching tube, the 6th switching tube are respectively PMOS K5, K6, the grid of PMOS K5, K6 is respectively the control end of the 5th switching tube, the 6th switching tube, the source electrode of PMOS K5, K6 is respectively the hot end of the 5th switching tube, the 6th switching tube, and the drain electrode of PMOS 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 as shown in the figure, does not repeat them here.
The embodiment of the present invention also provides a kind of LED lamp, comprise the dual-colored LED be formed in parallel by LED1 and LED2 of two kinds of colors, described LED1 and LED2 is respectively by one or many homochromy LED strip/compose in parallel, LED conducting direction in described LED1 is consistent, and the LED conducting direction in described LED2 is consistent.Specifically, described light fixture comprises the light adjusting circuit of dual-colored LED as described above in Example.Two-color LED dimming circuit can be arranged on outside LED lamp or be built in inside LED lamp, make two power lines produce the contrary voltage of positive-negative polarity, to light the LED of two kinds of different colours, thus realize light modulation and the toning of dual-colored LED on two power lines.
The invention provides a kind of LED lamp and two-color LED dimming circuit, two-color LED dimming circuit can be arranged on outside LED lamp or be built in inside LED lamp.By increasing a two-color LED dimming circuit in the LED front end of two kinds of colors, make two power lines produce the contrary voltage of positive-negative polarity, to light the LED of two kinds of different colours, thus realize light modulation and the toning of dual-colored LED on two power lines, circuit structure is simple, is easy to realize and cost is lower.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, although with reference to previous embodiment to invention has been comparatively detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments or carry out equivalent replacement to wherein portion of techniques feature.All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the light adjusting circuit of a dual-colored LED, described dual-colored LED is connected by two power lines, described dual-colored LED is formed in parallel by LED1 and 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:
PWM control unit, for being converted into operating voltage by external voltage and exporting two groups of pwm signals;
LED control unit, comprises the LED controlling brancher and the 2nd LED controlling brancher that are connected with described PWM control unit respectively, for controlling according to the break-make of described two groups of pwm signals to described LED1, LED2 respectively; And
Constant-current control unit, for keeping when described LED1, LED2 conducting current stabilization constant;
Wherein, a described LED controlling brancher and the 2nd LED controlling brancher are made up of three switching tubes and a resistance respectively;
A described LED controlling brancher comprises the first switching tube, second switch pipe, the 5th switching tube and resistance R1, first output of PWM control unit described in the control termination of described first switching tube, the hot end of described first switching tube connects operating voltage by described resistance R1, operating voltage described in the high potential termination of described 5th switching tube, the hot end of described first switching tube also connects the control end of described second switch pipe and the control end of the 5th switching tube simultaneously, the cold end of described 5th switching tube and the public connecting end of described second switch pipe hot end connect described first power line, the cold end of described first switching tube and cold end all ground connection of described second switch pipe,
Described 2nd LED controlling brancher comprises the 3rd switching tube, the 4th switching tube, the 6th switching tube and resistance R2, second output of PWM control unit described in the control termination of described 3rd switching tube, the hot end of described 3rd switching tube connects operating voltage by described resistance R2, the hot end of described 6th switching tube also connects described operating voltage, the hot end of described 3rd switching tube also connects the control end of described 4th switching tube and the control end of the 6th switching tube simultaneously, the cold end of described 6th switching tube and the public connecting end of described 4th switching tube hot end connect described constant-current control unit, the cold end of described 3rd switching tube and cold end all ground connection of described 4th switching tube.
2. the light adjusting circuit of dual-colored LED as claimed in claim 1, is characterized in that, described PWM control unit comprises interconnective Power convert branch road and pwm signal produces branch road;
Described Power convert branch road is used for the operating voltage voltage transitions that outside inputs become needed for described dual-colored LED, and powers to described pwm signal generation branch road; Described pwm signal produces branch road and exports two group pulse width than adjustable pwm signal respectively to a described LED controlling brancher and the 2nd LED controlling brancher, controls described LED1 and/or LED2 conducting luminous.
3. the light adjusting circuit of dual-colored LED as claimed in claim 1, is characterized in that:
Described 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 four switching tube, the hot end of the current collection of NPN type triode very the first to the four switching tube, the cold end of the transmitting of NPN type triode very the first to the four switching tube;
Described 5th switching tube, the 6th switching tube are PNP type triode, the base stage of PNP type triode is the control end of the 5th, the 6th switching tube, the hot end of the transmitting of PNP type triode very the 5th, the 6th switching tube, the cold end of the current collection of PNP type triode very the 5th, the 6th switching tube.
4. the light adjusting circuit of dual-colored LED as claimed in claim 1, is characterized in that:
Described first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube are NMOS tube, the grid of NMOS tube is the control end of the first to the four switching tube, the drain electrode of NMOS tube is the hot end of the first to the four switching tube, and the source electrode of NMOS tube is the cold end of the first to the four switching tube;
Described 5th switching tube, the 6th switching tube are PMOS, and the grid of PMOS is the control end of the 5th, the 6th switching tube, and the source electrode of PMOS is the hot end of the 5th, the 6th switching tube, and the drain electrode of PMOS is the cold end of the 5th, the 6th switching tube.
5. the light adjusting circuit of the dual-colored LED as described in claim 3 or 4, it is characterized in that: described constant-current control unit comprises adjustable resistance RI, described adjustable resistance RI is serially connected in the cold end of described 6th switching tube and between the public connecting end of described 4th switching tube hot end and second power line.
6. a LED lamp, comprises the dual-colored LED be formed in parallel by LED1 and LED2 of two kinds of colors, it is characterized in that, described light fixture comprises the light adjusting circuit of the dual-colored LED as described in any one of claim 1-5.
7. LED lamp as claimed in claim 6, is characterized in that, described LED1 and LED2 is respectively by one or many homochromy LED strip/compose in parallel, and unanimously, the LED conducting direction in described LED2 is consistent for the LED conducting direction in described LED1.
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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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN103068127B true CN103068127B (en) | 2015-07-29 |
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| CN104582189B (en) * | 2015-01-15 | 2017-03-29 | 魏泽科 | Intelligent dimming toning LED isolated drive circuits |
| CN105228295B (en) * | 2015-09-14 | 2018-08-07 | 浙江图讯科技股份有限公司 | Based on the Safety of Coal Mine Production of Internet of Things LED intelligent illumination systems |
| 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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| 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 |
| CN101404840A (en) * | 2008-11-04 | 2009-04-08 | 梁莉丽 | Two-wire system light-adjustable LED controller |
| 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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2013
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN101404840A (en) * | 2008-11-04 | 2009-04-08 | 梁莉丽 | Two-wire system light-adjustable LED controller |
| 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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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. |