CN113179565A - LED silicon controlled rectifier depth compensation circuit and LED lighting device of adjusting luminance - Google Patents
LED silicon controlled rectifier depth compensation circuit and LED lighting device of adjusting luminance Download PDFInfo
- Publication number
- CN113179565A CN113179565A CN202110490364.2A CN202110490364A CN113179565A CN 113179565 A CN113179565 A CN 113179565A CN 202110490364 A CN202110490364 A CN 202110490364A CN 113179565 A CN113179565 A CN 113179565A
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistor
- led
- silicon controlled
- compensation circuit
- 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.)
- Granted
Links
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 22
- 239000010703 silicon Substances 0.000 title claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 230000033228 biological regulation Effects 0.000 claims abstract description 5
- 230000006641 stabilisation Effects 0.000 claims abstract description 5
- 238000011105 stabilization Methods 0.000 claims abstract description 5
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides an LED silicon controlled rectifier dimming depth compensation circuit and an LED lighting device, which comprise: voltage input module, superimposed voltage module, voltage regulation end and voltage stabilization end, wherein: the voltage input module inputs voltage to the superposed voltage module; the superposed voltage module is electrically connected between the voltage regulating end and the voltage stabilizing end, and the voltage of the voltage regulating end is regulated by the superposed voltage module. The invention has reasonable structure, smart design and lower cost. By adding the voltage superposition module, the problem that the output current value of the traditional LED cannot be adjusted to be below 5% of dimming brightness is solved.
Description
Technical Field
The invention relates to the field of circuits, in particular to an LED silicon controlled rectifier dimming depth compensation circuit and an LED lighting device.
Background
The existing current splitting mode is to connect a circuit of linear current in parallel at two ends of the LED, so that the current flowing through the LED reaches a lower current by a splitting method, thereby achieving a deep dimming function.
In the conventional silicon controlled rectifier dimming application, because the reference potential of the output current set by the analog chip is generally set at the lowest level of 10% or 5%, the output current value of the LED is generally in the range of 10% -100% or 5% -100%, and the dimming brightness of 1% cannot be met;
in the combined application of MR16 thyristor dimming and an electronic transformer, when the thyristor angle is usually adjusted to the lowest, the voltage output by the chopped electronic transformer is still large, which results in the output current of the LED still maintaining a high output current, i.e. the minimum output current value can reach 20-50%, and cannot meet the requirement that the dimming depth is less than 10%, and the output LED current needs to be reduced to within 10% by adopting a method.
In summary, the existing dimming circuit cannot realize a deep dimming function.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an LED silicon controlled rectifier dimming depth compensation circuit and an LED lighting device.
The invention provides an LED silicon controlled rectifier dimming depth compensation circuit, which comprises: voltage input module, superimposed voltage module, voltage regulation end and voltage stabilization end, wherein:
the voltage input module inputs voltage to the superposed voltage module;
the superposed voltage module is electrically connected between the voltage regulating end and the voltage stabilizing end, and the voltage of the voltage regulating end is regulated by the superposed voltage module.
Preferably, the voltage input by the voltage input module is adjusted by the change of the dimming angle of the thyristor or the voltage change of the boosting side.
Preferably, the superimposed voltage module includes a transistor Q2, a collector of the transistor Q2 is connected to one end of a resistor R8 and one end of a resistor R10, the other end of the resistor R8 is connected to a voltage regulation end, and the other end of the resistor R10 is connected to a voltage stabilization end;
an emitter of the transistor Q2 is connected to one ends of the resistor R9 and the resistor R11, the other end of the resistor R9 is grounded, and the other end of the resistor R11 is connected to a reference voltage.
Preferably, the voltage stabilizing terminal is connected to the other end of the resistor R9 through a capacitor C7.
Preferably, the reference voltage is 5V.
Preferably, the voltage divider further comprises a voltage divider circuit that divides the input voltage and outputs the divided voltage.
Preferably, the voltage divider circuit includes a resistor R5 and a resistor R6, wherein:
one end of the resistor R5 is connected with input voltage, the other end of the resistor R5 is connected with one end of the resistor R6, and the other end of the resistor R6 is grounded;
the divided voltage is output from between the resistor R5 and the resistor R6.
Preferably, the device further comprises a filter circuit, wherein the filter circuit comprises a resistor R7 and a capacitor C6, and the capacitor C6 is:
one end of the resistor R7 is connected between the resistor R5 and the resistor R6, the other end of the resistor R7 is connected with the base of the triode Q2 and one end of the capacitor C6, and the other end of the capacitor C6 is grounded.
The LED lighting device provided by the invention comprises the LED silicon controlled rectifier dimming depth compensation circuit.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has reasonable structure, smart design and lower cost.
2. According to the invention, the problem that the output current value of the traditional LED cannot be adjusted to be below 5% of dimming brightness is solved by adding the superposed voltage module.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of an LED silicon controlled rectifier dimming depth compensation circuit.
Fig. 2 is a circuit schematic diagram of the LED silicon controlled rectifier dimming depth compensation circuit.
Fig. 3 is a schematic diagram of a specific application of the LED silicon controlled rectifier dimming depth compensation circuit.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1 to 3, according to the LED triac dimming depth compensation circuit and the LED lighting device provided by the present invention, by determining the change of the triac dimming angle or the voltage change at the boost side (that is, the voltage at both ends of the LED decreases with the decrease of the current), a voltage value is obtained through a certain circuit, and then the voltage value is converted into a current value through the circuit, and finally the voltage value V (r8) generated by the current value is superimposed on the potential FB set by the chip current, according to kirchhoff voltage law Vfb-Vfb 1+ V (r8), the magnitude of the potential FB is smaller than the original value due to the addition of V (r8), and the required current depth can be obtained as long as V (r8) is properly set. Specifically, a voltage value is obtained by judging the change of the dimming angle of the silicon controlled rectifier or the voltage change of the boosting side, the voltage value is fed back to the detection potential Vfb1 of the set current, and the detection potential Vfb1 is lowered by superposition or other modes, so that the requirement of dimming depth is met.
According to the circuit schematic diagram of an embodiment of the invention, the circuit can be connected in parallel between the rectifier bridge and the ground by 2 resistors R5 and R6, the resistor R7 is connected between the two ends of R5 and R6, and the capacitor C6 and the base of the PNP triode Q2 are connected by R7; one end of each of the resistors R9 and R11 is connected to the emitter of the transistor Q2, the other end of the resistor R9 is grounded, and the other end of the resistor R11 is connected to the reference voltage V5V. The resistor R8 is connected with the resistor R10 and connected between the FB1 and the FB in parallel, the collector of the triode Q2 is connected between the resistor R8 and the resistor R10, and the capacitor C7 is connected between the FB and the ground in parallel.
The working principle of the invention is as follows: the voltage after the rectifier bridge is divided and filtered to obtain a dynamic voltage value, the base voltage of the PNP triode is controlled, when the voltage Vb is gradually smaller than the voltage Ve and Vbe is gradually conducted, the conduction current Ic starts to be generated, Ic flows through two ends of a resistor R8 to generate a voltage V (R8), and at the moment, the voltage Vfb of the chip setting output current is Vfb1+ V (R8), namely Iout is [ Vfb-V (R8) ]/R.
When the thyristor angle is smaller, the voltage behind the bridge is smaller, and on the contrary, the larger the Vbe conduction angle is, the larger the generated V (r8) is, and the smaller the output current Iout is.
The invention realizes the depth compensation function of the dimming circuit and can meet 1% of dimming brightness.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. An LED silicon controlled rectifier dimming depth compensation circuit is characterized by comprising: voltage input module, superimposed voltage module, voltage regulation end and voltage stabilization end, wherein:
the voltage input module inputs voltage to the superposed voltage module;
the superposed voltage module is electrically connected between the voltage regulating end and the voltage stabilizing end, and the voltage of the voltage regulating end is regulated by the superposed voltage module.
2. The LED silicon controlled rectifier dimming depth compensation circuit according to claim 1, wherein the voltage input by the voltage input module is adjusted by the change of the silicon controlled rectifier dimming angle or the voltage change of the boosting side.
3. The LED silicon controlled rectifier dimming depth compensation circuit of claim 1, wherein the superposition voltage module comprises a transistor Q2, the collector of the transistor Q2 is connected with one end of a resistor R8 and a resistor R10, the other end of the resistor R8 is connected with a voltage regulation end, and the other end of the resistor R10 is connected with a voltage stabilization end;
an emitter of the transistor Q2 is connected to one ends of the resistor R9 and the resistor R11, the other end of the resistor R9 is grounded, and the other end of the resistor R11 is connected to a reference voltage.
4. The LED silicon controlled rectifier dimming depth compensation circuit as claimed in claim 3, wherein the voltage stabilizing terminal is connected to the other end of the resistor R9 through a capacitor C7.
5. The LED silicon controlled rectifier dimming depth compensation circuit of claim 3, wherein the reference voltage is 5V.
6. The LED silicon controlled dimming depth compensation circuit of claim 3, further comprising a voltage division circuit, wherein the voltage division circuit divides an input voltage and outputs the divided voltage.
7. The LED silicon controlled dimming depth compensation circuit of claim 6, wherein the voltage divider circuit comprises a resistor R5 and a resistor R6, wherein:
one end of the resistor R5 is connected with input voltage, the other end of the resistor R5 is connected with one end of the resistor R6, and the other end of the resistor R6 is grounded;
the divided voltage is output from between the resistor R5 and the resistor R6.
8. The LED silicon controlled dimming depth compensation circuit of claim 7, further comprising a filter circuit comprising a resistor R7 and a capacitor C6, wherein:
one end of the resistor R7 is connected between the resistor R5 and the resistor R6, the other end of the resistor R7 is connected with the base of the triode Q2 and one end of the capacitor C6, and the other end of the capacitor C6 is grounded.
9. The LED silicon controlled rectifier dimming depth compensation circuit of claim 3, wherein the transistor Q2 is a PNP transistor.
10. An LED lighting device, comprising the LED triac dimming depth compensation circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490364.2A CN113179565B (en) | 2021-05-06 | 2021-05-06 | LED silicon controlled rectifier dimming depth compensation circuit and LED lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490364.2A CN113179565B (en) | 2021-05-06 | 2021-05-06 | LED silicon controlled rectifier dimming depth compensation circuit and LED lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113179565A true CN113179565A (en) | 2021-07-27 |
| CN113179565B CN113179565B (en) | 2024-01-12 |
Family
ID=76928847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110490364.2A Active CN113179565B (en) | 2021-05-06 | 2021-05-06 | LED silicon controlled rectifier dimming depth compensation circuit and LED lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113179565B (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110001766A1 (en) * | 2009-07-06 | 2011-01-06 | Guichao Hua | LED Drive Circuit For SCR Dimming |
| CN103716952A (en) * | 2013-09-17 | 2014-04-09 | 宁波凯耀电器制造有限公司 | LED switch power supply and control method thereof |
| US20140175997A1 (en) * | 2012-12-25 | 2014-06-26 | Unity Opto Technology Co., Ltd. | Adaptive light emitting diode dimming driving circuit |
| US20140265904A1 (en) * | 2013-03-12 | 2014-09-18 | Osram Gmbh | Dimmer circuit and led lighting device having said dimmer circuit |
| CN204362379U (en) * | 2015-01-06 | 2015-05-27 | 横店集团得邦照明股份有限公司 | A kind of auto-excitation type LED conversion equipment realizing non-pole light regulating |
| CN204442749U (en) * | 2014-12-31 | 2015-07-01 | 无锡安特源科技有限公司 | For exchanging the current compensation circuit of phase-cut dimming LED power |
| CN104902648A (en) * | 2015-06-11 | 2015-09-09 | 矽力杰半导体技术(杭州)有限公司 | LED light-adjustment circuit with silicon controlled rectifier, and light-adjustment method |
| US20160021711A1 (en) * | 2013-03-06 | 2016-01-21 | Xiamen Yankon Energetic Lighting Co., Ltd. | Circuit with an led dimming linear compensation |
| CN205265945U (en) * | 2015-12-04 | 2016-05-25 | 佛山电器照明股份有限公司 | Linear constant current dimmer circuit of LED |
| CN205454142U (en) * | 2015-12-24 | 2016-08-10 | 上海晶丰明源半导体有限公司 | Dimmer circuit , chip and dimming system adjust luminance |
| CN106304484A (en) * | 2016-08-22 | 2017-01-04 | 上海晶丰明源半导体有限公司 | Controllable silicon light modulation LED drive power and dimming controlling method thereof |
| CN205912289U (en) * | 2016-07-04 | 2017-01-25 | 台州市椒光照明有限公司 | Adjustable LED lamp driving circuit of wide voltage |
| CN106455216A (en) * | 2016-10-19 | 2017-02-22 | 东南大学 | Silicon controlled rectifier dimming control system for LED brightness adjustment |
| CN208128590U (en) * | 2018-04-28 | 2018-11-20 | 深圳市垅运照明电器有限公司 | A kind of linearity light adjusting circuit and dimming power source |
| CN208337933U (en) * | 2018-01-19 | 2019-01-04 | 广东省外贸开发有限公司 | A kind of Novel LED light driving circuit structure |
| CN110177410A (en) * | 2019-05-24 | 2019-08-27 | 深圳市晟碟半导体有限公司 | A kind of LED light adjusting circuit, dimming device and light-dimming method |
| US20200128645A1 (en) * | 2017-05-19 | 2020-04-23 | Shenzhen Sendis Semiconductor Co., Ltd | Led driving device, constant-power dimming circuit and dimming method thereof |
| CN212115738U (en) * | 2020-03-30 | 2020-12-08 | 浙江凯耀照明有限责任公司 | Non-stroboscopic dimming driver utilizing input valley bottom compensation |
-
2021
- 2021-05-06 CN CN202110490364.2A patent/CN113179565B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110001766A1 (en) * | 2009-07-06 | 2011-01-06 | Guichao Hua | LED Drive Circuit For SCR Dimming |
| US20140175997A1 (en) * | 2012-12-25 | 2014-06-26 | Unity Opto Technology Co., Ltd. | Adaptive light emitting diode dimming driving circuit |
| US20160021711A1 (en) * | 2013-03-06 | 2016-01-21 | Xiamen Yankon Energetic Lighting Co., Ltd. | Circuit with an led dimming linear compensation |
| US20140265904A1 (en) * | 2013-03-12 | 2014-09-18 | Osram Gmbh | Dimmer circuit and led lighting device having said dimmer circuit |
| CN103716952A (en) * | 2013-09-17 | 2014-04-09 | 宁波凯耀电器制造有限公司 | LED switch power supply and control method thereof |
| CN204442749U (en) * | 2014-12-31 | 2015-07-01 | 无锡安特源科技有限公司 | For exchanging the current compensation circuit of phase-cut dimming LED power |
| CN204362379U (en) * | 2015-01-06 | 2015-05-27 | 横店集团得邦照明股份有限公司 | A kind of auto-excitation type LED conversion equipment realizing non-pole light regulating |
| CN104902648A (en) * | 2015-06-11 | 2015-09-09 | 矽力杰半导体技术(杭州)有限公司 | LED light-adjustment circuit with silicon controlled rectifier, and light-adjustment method |
| CN205265945U (en) * | 2015-12-04 | 2016-05-25 | 佛山电器照明股份有限公司 | Linear constant current dimmer circuit of LED |
| CN205454142U (en) * | 2015-12-24 | 2016-08-10 | 上海晶丰明源半导体有限公司 | Dimmer circuit , chip and dimming system adjust luminance |
| CN205912289U (en) * | 2016-07-04 | 2017-01-25 | 台州市椒光照明有限公司 | Adjustable LED lamp driving circuit of wide voltage |
| CN106304484A (en) * | 2016-08-22 | 2017-01-04 | 上海晶丰明源半导体有限公司 | Controllable silicon light modulation LED drive power and dimming controlling method thereof |
| CN106455216A (en) * | 2016-10-19 | 2017-02-22 | 东南大学 | Silicon controlled rectifier dimming control system for LED brightness adjustment |
| US20200128645A1 (en) * | 2017-05-19 | 2020-04-23 | Shenzhen Sendis Semiconductor Co., Ltd | Led driving device, constant-power dimming circuit and dimming method thereof |
| CN208337933U (en) * | 2018-01-19 | 2019-01-04 | 广东省外贸开发有限公司 | A kind of Novel LED light driving circuit structure |
| CN208128590U (en) * | 2018-04-28 | 2018-11-20 | 深圳市垅运照明电器有限公司 | A kind of linearity light adjusting circuit and dimming power source |
| CN110177410A (en) * | 2019-05-24 | 2019-08-27 | 深圳市晟碟半导体有限公司 | A kind of LED light adjusting circuit, dimming device and light-dimming method |
| CN212115738U (en) * | 2020-03-30 | 2020-12-08 | 浙江凯耀照明有限责任公司 | Non-stroboscopic dimming driver utilizing input valley bottom compensation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113179565B (en) | 2024-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9961735B2 (en) | LED constant-voltage dimming power supply and dimming system for LED lamp having same | |
| US9197122B2 (en) | Load drive circuit, load drive method, and luminaire | |
| US10292229B1 (en) | Line voltage compensation circuit, led drive system and drive method | |
| US9414455B2 (en) | Systems and methods for dimming control with capacitive loads | |
| WO2008094232A1 (en) | Current source with indirect load current signal extraction | |
| EP3731601A1 (en) | Current drive circuit, and light emitting diode lighting device using the same | |
| US20190098717A1 (en) | Ballast system, luminaire, lighting control system, lighting control method and non-transitory computer readable medium | |
| US20130293154A1 (en) | Light emitting element driving circuits with dimming function and control methods thereof | |
| US5485077A (en) | Concentric servo voltage regulator utilizing an inner servo loop and an outer servo loop | |
| US10708993B2 (en) | Driver and LED lamp comprising driver | |
| CN110545605B (en) | Integrated circuit, dimmable LED drive circuit and drive method thereof | |
| CN107734777B (en) | LED driving chip, LED driving circuit and LED lighting device | |
| US8525438B1 (en) | Load driver with integrated power factor correction | |
| CN204904121U (en) | Low voltage difference linear voltage stabilizing circuit with protection of high frequency transient voltage | |
| CN113179565B (en) | LED silicon controlled rectifier dimming depth compensation circuit and LED lighting device | |
| US11076465B2 (en) | Multi-segment linear LED drive circuit, device and driving method | |
| US20210055753A1 (en) | Linear power supply | |
| US10667352B2 (en) | PWM signal generating system and light device driving system | |
| US8773046B2 (en) | Driving circuit having voltage dividing circuits and coupling circuit for controlling duty cycle of transistor and related circuit driving method thereof | |
| CN107834850A (en) | DC linear voltage-stabilized power supply circuit | |
| US20170196052A1 (en) | Led linear constant power driver circuit | |
| CN105302216B (en) | Low-dropout linear voltage-regulating circuit with high frequency transient voltages protection | |
| US9590487B2 (en) | Method and circuit for reducing ripple of current output by current source | |
| CN1716142A (en) | Power supply apparatus provided with overcurrent protection function | |
| TWI604757B (en) | Line voltage compensation system for LED constant current control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |