CN203301815U - Shunting type LED dimming drive system - Google Patents
Shunting type LED dimming drive system Download PDFInfo
- Publication number
- CN203301815U CN203301815U CN2013202885528U CN201320288552U CN203301815U CN 203301815 U CN203301815 U CN 203301815U CN 2013202885528 U CN2013202885528 U CN 2013202885528U CN 201320288552 U CN201320288552 U CN 201320288552U CN 203301815 U CN203301815 U CN 203301815U
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- China
- Prior art keywords
- adjustable constant
- led lamp
- total
- constant current
- lamp string
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Abstract
The invention discloses a shunting type LED dimming drive system comprising a total adjustable constant current source used for adjusting the total system current and a controller, wherein the input end of the total adjustable constant current source is connected with a power supply, a first LED lamp string composed of a plurality of serially connected LED lamps is connected between the output end of the total adjustable constant current source and the ground, the first LED lamp string is parallel connection with a second LED lamp string composed of a plurality of LED lamps connected with the total adjustable constant current source, and the controller is respectively connected with the control ends of the total adjustable constant current source and a branch adjustable constant current source. The total current of the system is controlled by the total adjustable constant current source, one branch power supply of the system is assistantly controlled by an auxiliary constant current power supply so as to control the size of another branch power supply in the system to control the brightness and chromaticity of the LED lamp strings of the system.
Description
[technical field]
The utility model relates to a kind of shunting LED dimming drive system.
[background technology]
At present, conventional light modulation scheme is all the method that adopts two independently adjustable constant-flow power supplys to control, need to adjust separately the constant-current source of each branch road, control brightness and the colourity of a circuit LED lamp, so when two circuit powers were adjusted into maximum, it is maximum that the power of output also will reach, and is also the power sum of branch road constant-current power supply, if but when the LED lamp of two branch roads needed different colors, its power just was difficult to accomplish constant.
[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, a kind of shunting LED dimming drive system is provided, by utilizing main adjustable constant-flow power supply to carry out the total current of control system, carry out a wherein branch road power supply of supplementary controlled system with an auxiliary constant-current supply again, thereby the size of another branch road power supply in control system, reach the brightness of control system LED lamp string and the effect of colourity.
For achieving the above object, the utility model has adopted following technical proposal:
A kind of shunting LED dimming drive system, it is characterized in that: include total adjustable constant flow source 1 and controller 5 for the adjustment System total current, described total adjustable constant flow source 1 input is connected with power supply, be connected by a plurality of LED lamps and be connected in series a LED lamp string 2 that forms between described total adjustable constant flow source 1 output and ground, a described LED lamp string 2 is connected in parallel and is connected in series by a plurality of LED lamps and a minute adjustable constant flow source 4 the 2nd LED lamp string 3 that forms, and described controller 5 connects respectively the control end in total adjustable constant flow source 1 and minute adjustable constant flow source 4.
An end after in described the 2nd LED lamp string 3, a plurality of LED lamps are connected in series is connected with a minute adjustable constant flow source 4.
The beneficial effects of the utility model are:
1, the utility model adopts simple Linear CCS can reach high efficiency.
2, the utility model peak power output is limited in the power of main constant-current source.
3, the utility model is simple to the adjustment operation of LED lamplight brightness and colourity in system.
4, the utility model cost is low, far below the cost of traditional double independence constant-current source.
[description of drawings]
Fig. 1 is traditional LED Drive Structure schematic diagram;
Fig. 2 is structural representation of the present utility model.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and execution mode of the present utility model:
As shown in Figure 1, in the prior art, when needs regulate a LED lamp string 1 ' and the 2nd LED lamp string 2 ' colourity the time, respectively to adjustable constant flow source 3 ' output current I
a' and adjustable constant flow source 4 ' output current I
b' regulate, thus electric current and the control system total current of every circuit changed, and this control program is difficult to accomplish the constant of power; When needs regulate a LED lamp string 1 ' and the 2nd LED lamp string 2 ' brightness the time, equally also need respectively to adjustable constant flow source 3 ' output current I
a' and adjustable constant flow source 4 ' output current I
b' to regulate, the output gross power is P
a+ P
b, work as I
a' and I
b' while being maximum, it is maximum that gross power also reaches, and two LED lamp strings reach the brightest effect.
As shown in Figure 2, a kind of shunting LED dimming drive system, include total adjustable constant flow source 1 and controller 5 for the adjustment System total current, described total adjustable constant flow source 1 input is connected with power supply, be connected by a plurality of LED lamps and be connected in series a LED lamp string 2 that forms between described total adjustable constant flow source 1 output and ground, a described LED lamp string 2 is connected in parallel and is connected in series by a plurality of LED lamps and a minute adjustable constant flow source 4 the 2nd LED lamp string 3 that forms, and described controller 5 connects respectively the control end in total adjustable constant flow source 1 and minute adjustable constant flow source 4.
An end after in described the 2nd LED lamp string 3, a plurality of LED lamps are connected in series is connected with a minute adjustable constant flow source 4.
The operation principle of native system is I
m=I
a+ I
bWhen needs colourity, keep toning degree ratio I
mConstant, regulate I
bSize, colourity is namely according to I
b: I
aRatio change; When the needs brightness adjusting, the I that regulates simultaneously
mAnd I
bSize, keep I simultaneously
b: I
aFor definite value, because I
a: I
b=(I
m-I
b)/I
b=I
m/ I
b-1, so as long as keep I
m/ I
bFor definite value can keep colourity constant.
Wherein a kind of driving method of shunting LED light modulation colourity is I for the total current of controlling 1 output of total adjustable constant flow source by controller 5
m, and keep I
mConstant, be I if flow through minute electric current of 2 circuit of a LED lamp string
a, a minute electric current that flows through 3 circuit of the 2nd LED lamp string is I
b, I
m=I
a+ I
bController 5 is controlled a minute adjustable constant flow source 4, regulates a circuital current I
bSize, I
aChange, the colourity of the 2nd LED lamp string 3 and a LED lamp string 2 is according to electric current I thereupon
b: I
aRatio change.
A kind of shunting LED light modulation brightness driving method is I for the electric current of controlling 1 output of total adjustable constant flow source by controller 5
m, and regulate I
mA size stream minute electric current of crossing 2 circuit of a LED lamp string be I
a, a minute electric current that flows through 3 circuit of the 2nd LED lamp string is I
b, I
m=I
a+ I
bController 5 is controlled minute adjustable constant flow source 4 and is regulated a circuital current I
bSize, make I
m/ I
b, for definite value, keep the 2nd LED lamp string 3 and LED lamp string 2 electric current I
b: I
aConstant rate, namely keep colourity constant.
Claims (2)
1. shunting LED dimming drive system, it is characterized in that: include total adjustable constant flow source (1) and controller (5) for the adjustment System total current, described total adjustable constant flow source (1) input is connected with power supply, be connected by a plurality of LED lamps and be connected in series a LED lamp string (2) that forms between described total adjustable constant flow source (1) output and ground, a described LED lamp string (2) is connected in parallel and is connected in series by a plurality of LED lamps and a minute adjustable constant flow source (4) the 2nd LED lamp string (3) that forms, described controller (5) connects respectively the control end in total adjustable constant flow source (1) and minute adjustable constant flow source (4).
2. a kind of shunting LED dimming drive system according to claim 1, is characterized in that in described the 2nd LED lamp string (3) that the end after a plurality of LED lamps are connected in series is connected with a minute adjustable constant flow source (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202885528U CN203301815U (en) | 2013-05-23 | 2013-05-23 | Shunting type LED dimming drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202885528U CN203301815U (en) | 2013-05-23 | 2013-05-23 | Shunting type LED dimming drive system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203301815U true CN203301815U (en) | 2013-11-20 |
Family
ID=49577791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202885528U Expired - Fee Related CN203301815U (en) | 2013-05-23 | 2013-05-23 | Shunting type LED dimming drive system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203301815U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260313A (en) * | 2013-05-23 | 2013-08-21 | 中山市德源照明电器有限公司 | Shunting-type LED dimming drive system and method thereof |
| CN107635330A (en) * | 2017-09-28 | 2018-01-26 | 惠州莫思特智照科技有限公司 | Light modulating device and dimming lamp |
| CN112118655A (en) * | 2020-09-07 | 2020-12-22 | 漳州立达信光电子科技有限公司 | LED control circuit and LED lamp |
-
2013
- 2013-05-23 CN CN2013202885528U patent/CN203301815U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260313A (en) * | 2013-05-23 | 2013-08-21 | 中山市德源照明电器有限公司 | Shunting-type LED dimming drive system and method thereof |
| CN103260313B (en) * | 2013-05-23 | 2015-12-09 | 中山市德源照明电器有限公司 | A kind of shunting LED dimming drive system and method thereof |
| CN107635330A (en) * | 2017-09-28 | 2018-01-26 | 惠州莫思特智照科技有限公司 | Light modulating device and dimming lamp |
| CN112118655A (en) * | 2020-09-07 | 2020-12-22 | 漳州立达信光电子科技有限公司 | LED control circuit and LED lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20180523 |