CN105282944A - Light-adjustable constant voltage output type LED driving control circuit - Google Patents
Light-adjustable constant voltage output type LED driving control circuit Download PDFInfo
- Publication number
- CN105282944A CN105282944A CN201510830191.9A CN201510830191A CN105282944A CN 105282944 A CN105282944 A CN 105282944A CN 201510830191 A CN201510830191 A CN 201510830191A CN 105282944 A CN105282944 A CN 105282944A
- Authority
- CN
- China
- Prior art keywords
- led
- voltage
- constant voltage
- driver
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a light-adjustable constant voltage output type LED drive circuit, which comprises an LED constant voltage driver and a light modulator connected to a live wire input terminal of the LED constant voltage driver; the LED constant voltage driver output voltage changes with the chopper angle size of the light modulator while adjusting the light modulator on the front side and the back side of the live wire input terminal, making the work output voltage change within a certain scope. According to the invention, a limitation of a conventional LED driver control circuit on a load is well overcome; light modulation is realized; and a terminal client can combine LEDs in different specification freely as long as the load branch voltage is guaranteed within a maximum work voltage scope and the maximum output power is no more than a rated output power.
Description
Technical field
The present invention relates to LED lighting control technique, more specifically refer to a kind of tunable optical constant voltage output type LED Drive and Control Circuit.
Background technology
Current LED driver is divided into two kinds according to output type, and one is constant current output pattern, and one is constant voltage output mode, and the driver load of these two kinds of patterns is LED.LED has himself feature---require that the electric current flowing through LED is relatively stable.If the electric current flowing through LED there occurs change, LED send light brightness will change, thus just create can the constant current output mode LED driver of regulation output electric current, i.e. constant-current type Dimmable LED driver.This constant-current dimming control circuit mainly carries out collection feedback to realize the adjustable function of output current to the input voltage of product and output current.But this drive circuit in use has certain limitation, main manifestations is that the driver of this type is strict to load request.As shown in Figure 1, if D2 is because of failure to trip in LED load string, then whole load string will quit work because not forming current circuit.So this kind of drive circuit can cause whole power supply to work because individual loads damages, and is unfavorable for actual use.
In addition, although this drive circuit can realize the function of light modulation, the load that terminal client uses will be subject to the restriction of drive characteristics to a great extent.Such as: a 30W700mALED driver, it limits final load and must be connected in series for the LED load of 700mA, maximum load can only be 10 3WLED serial connections, this is by the quantity of considered critical lamp pearl, be unfavorable for the multiple use of terminal client, especially, when people propose requirements at the higher level to the brightness of light source, the single-string LED brightness that this circuit structure drives can not be satisfied the demand.
In this context, people start to consider to use constant-current type tunable optical drive circuit to drive the circuit structure of parallel connection LED load.This circuit structure can be that the usage quantity of LED increases greatly as shown in Figure 2, thus meets the demand promoting brightness, but brings stubborn problem more simultaneously.For Fig. 2, if the D2 in a certain load branch is because of failed shorted, then this branch road will quit work, but single branch road quits work whole driver can not be caused to quit work, and the output current of driver also can not because of but the open circuit of branch road and reducing.Now unnecessary current potential must be increased on other lamp string branch roads, thus causes other branch currents to increase.LED works down for a long time under high current load will affect the life-span of LED, and other lamp strings LED can be caused time serious to burn because of overcurrent.For avoiding the generation of this kind of situation, people start to consider design constant-pressure type LED driver (as Fig. 3).Consider the characteristic of LED---LED two ends apply a suitable voltage, as long as this voltage is no more than the Vf value of LED self, LED just can be operated in normal mode.When this magnitude of voltage declines, as long as it is not less than the minimum value of LEDVf, LED still can normally work, and just brightness can be dimmed.When people use, want to use constant voltage design circuit just to become very difficult to the brightness adjusting light source.
Summary of the invention
The invention provides a kind of tunable optical constant voltage output type LED Drive and Control Circuit, by the structural design of uniqueness, the present invention can well overcome conventional LED driver control circuit to the localizing defect of load, the present invention not only can realize the function of light modulation, and terminal client arbitrarily can combine the LED of different size, as long as can ensure that load branch voltage is within the scope of maximum working voltage, peak power output is no more than rated output power.
the technical solution used in the present invention is:a kind of tunable optical constant voltage output type LED drive circuit, comprise LED constant-voltage driver and be connected to the dimmer of the live wire input in this LED constant-voltage driver, make before and after described live wire input along under the adjustment of described dimmer, LED constant-voltage driver output voltage changes with the copped wave angular dimension change of dimmer, and its working output voltage is changed in a certain scope.
Beneficial effect of the present invention is: the present invention can well overcome conventional LED driver control circuit to the localizing defect of load, the present invention not only can realize the function of light modulation, and terminal client arbitrarily can combine the LED of different size, as long as can ensure that load branch voltage is within the scope of maximum working voltage, peak power output is no more than rated output power.
Accompanying drawing explanation
fig. 1, Fig. 2, Fig. 3 are prior art circuits structural representation.
fig. 4 is electrical block diagram of the present invention.
Embodiment
Be illustrated in figure 4 one of the present invention preferably specific embodiment,
A kind of tunable optical constant voltage output type LED drive circuit comprises LED constant-voltage driver 10 and is arranged on the dimmer 20 in live wire input 11 forward position in this LED constant-voltage driver, make before and after described live wire input along under the adjustment of described dimmer 20, LED constant-voltage driver 10 output voltage changes with the copped wave angular dimension change of dimmer 20, and its working output voltage is changed in a certain scope.
Such as: the LED driver that 30W12V constant voltage exports, before input trailing edge dimmer adjustment under, LED driver output voltage changes with the change of dimmer copped wave angular dimension, and its working output voltage is changed in a certain scope.Such terminal use just arbitrarily can combine the LED of different size, as long as can ensure that load branch voltage is within the scope of maximum working voltage, peak power output is no more than rated output power.
Embodiments of the invention and accompanying drawing are just in order to show design concept of the present invention, and protection scope of the present invention should not be confined to this embodiment.
By above describe can find out that purpose of design of the present invention can effectively be implemented.The portion shows of embodiment object of the present invention and implement function and structure theme, and comprise other equivalent replacement.
Therefore, right of the present invention forms the equivalence comprising other and implements, concrete right range reference claim.
Claims (1)
1. a tunable optical constant voltage output type LED drive circuit, it is characterized in that: comprise LED constant-voltage driver and be connected to the dimmer of the live wire input in this LED constant-voltage driver, make before and after described live wire input along under the adjustment of described dimmer 20, LED constant-voltage driver 10 output voltage changes with the copped wave angular dimension change of dimmer 20, and its working output voltage is changed in a certain scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510830191.9A CN105282944A (en) | 2015-11-25 | 2015-11-25 | Light-adjustable constant voltage output type LED driving control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510830191.9A CN105282944A (en) | 2015-11-25 | 2015-11-25 | Light-adjustable constant voltage output type LED driving control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105282944A true CN105282944A (en) | 2016-01-27 |
Family
ID=55151041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510830191.9A Pending CN105282944A (en) | 2015-11-25 | 2015-11-25 | Light-adjustable constant voltage output type LED driving control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105282944A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032552A1 (en) * | 2016-08-19 | 2018-02-22 | 唐晓云 | Microcomputer-controlled led color lamp with intelligent light switching |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646289A (en) * | 2009-06-29 | 2010-02-10 | 潘忠浩 | Light-adjusting and speed-adjusting control circuit and control method thereof |
| CN102573213A (en) * | 2011-11-28 | 2012-07-11 | 宁波凯耀电器制造有限公司 | LED (Light Emitting Diode) dimming system |
| CN102573209A (en) * | 2010-10-28 | 2012-07-11 | 三美电机株式会社 | Lighting power supply device and method for controlling holding current |
| CN102740545A (en) * | 2011-04-13 | 2012-10-17 | 刘刚 | Constant voltage dimmable led driver |
-
2015
- 2015-11-25 CN CN201510830191.9A patent/CN105282944A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646289A (en) * | 2009-06-29 | 2010-02-10 | 潘忠浩 | Light-adjusting and speed-adjusting control circuit and control method thereof |
| CN102573209A (en) * | 2010-10-28 | 2012-07-11 | 三美电机株式会社 | Lighting power supply device and method for controlling holding current |
| CN102740545A (en) * | 2011-04-13 | 2012-10-17 | 刘刚 | Constant voltage dimmable led driver |
| CN102573213A (en) * | 2011-11-28 | 2012-07-11 | 宁波凯耀电器制造有限公司 | LED (Light Emitting Diode) dimming system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032552A1 (en) * | 2016-08-19 | 2018-02-22 | 唐晓云 | Microcomputer-controlled led color lamp with intelligent light switching |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102892238B (en) | Dimming drive circuit of AC (Alternating Current) direct drive LED module | |
| CN103167688B (en) | Lighting apparatus | |
| CN102917516B (en) | Method for resolving excess temperature of constant current driving chips and light-emitting diode (LED) lamp bar driving circuit | |
| CN104125686A (en) | Safe-isolated and full-color LED lamp circuit and dimming method | |
| CN103561509A (en) | LED drive circuit structure with separated switching tube | |
| CN106332369B (en) | LED light bar light modulation toning circuit temperature | |
| CN101813260B (en) | LED lamp device and PWM (Pulse Width Modulation) direct current supply control circuit | |
| CN105282944A (en) | Light-adjustable constant voltage output type LED driving control circuit | |
| CN102098841A (en) | Railway light-emitting diode (LED) signal lamp lightening control circuit and railway light-emitting diode (LED) signal lamp lightening control method | |
| CN208623945U (en) | A kind of multiple-channel output dimming power source meeting U.S. rule CLASS2 | |
| CN104427692A (en) | Light-controlled automatic switch circuit and lamp | |
| CN103167675A (en) | Light-emitting diode (LED) lamp with overheat protection circuit | |
| CN204795799U (en) | LED drive circuit can adjust luminance | |
| CN104080226B (en) | A kind of circuit controlling triode switch according to sample rate current | |
| CN206790732U (en) | A kind of new light adjusting circuit of adjustable dim light electric current | |
| CN103619100B (en) | LED circuit module, LED are adjustable light modulation and LED illumination System | |
| CN105142266A (en) | Dimmable light-emitting diode (LED) drive circuit | |
| CN202121826U (en) | Constant current driving circuit of high-power LED luminescent device | |
| CN102281674A (en) | Constant current driving circuit of high-power light-emitting diode (LED) light-emitting device | |
| CN203814016U (en) | Light-operable and light adjustable LED circuit | |
| CN104125675A (en) | LED lamp dimming circuit | |
| CN204536972U (en) | A kind of adjustable constant-current circuit | |
| EP3358911B1 (en) | Light emitting diode system with light signals carried via power lines | |
| CN102135238A (en) | Light adjustable alternating current LED lamp and dimmer thereof | |
| CN203632941U (en) | LED drive circuit structure with separated switching tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160127 |