CN107155236B - A kind of segmented control LED light string control system - Google Patents
A kind of segmented control LED light string control system Download PDFInfo
- Publication number
- CN107155236B CN107155236B CN201710390494.2A CN201710390494A CN107155236B CN 107155236 B CN107155236 B CN 107155236B CN 201710390494 A CN201710390494 A CN 201710390494A CN 107155236 B CN107155236 B CN 107155236B
- Authority
- CN
- China
- Prior art keywords
- resistance
- amplifier
- led light
- voltage
- light string
- 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.)
- Active
Links
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]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
-
- 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]
Landscapes
- Led Devices (AREA)
Abstract
The present invention relates to LED light string control technology fields, in particular a kind of segmented controls LED light string control system, including voltage sampling circuit, voltage compensating circuit and PID controller, the voltage sampling circuit input terminal is connected to LED light string, output end is connected to A/D conversion modules by voltage transmitter, which is connected to the PID controller；One in two input terminals of comparator is connected between voltage transmitter and A/D conversion modules, another is connected to the PID controller by phase shifter, the output end of the comparator and the input terminal of voltage compensating circuit connect, and the output end of the voltage compensating circuit is connect with LED light string.There is the present invention pressure difference between LED light string to compensate, to reach the characteristics of segmented controls.
Description
Technical field
The present invention relates to LED light string control technology field, specially a kind of segmented controls LED light string control system.
Background technology
LED is with the title of its " green light source " and multiple technologies advantage, gradually instead of CCFL, daylight before
The light sources such as lamp.Under normal conditions, plurality of LEDs is by certain string simultaneously (after the series connection of multiple LED light, each series arm is in parallel) structure
Electric connecting relation is formed, and is driven by booster circuit all the way, is worked at the same time in constant current mode.Include 2 in backlight
Go here and there the above LED light string when, due to being driven using booster circuit all the way, while the difference between LED individual characters, often go here and there
For LED when constant current drives, voltage drop is discrepant.Voltage drop difference is bigger between LED light string, the voltage of rear class component
Difference is also bigger, and the component of passage portion can bear very high voltage, and such as voltage divides between LED light string not in time
Section control, then cause operating power excessive, calorific value is big, and rear class component can be burnt out when serious.
Invention content
The purpose of the present invention is to provide a kind of segmenteds to control LED light string control system, to solve above-mentioned background technology
The problem of middle proposition.There is the segmented control LED light string control system pressure difference between LED light string to compensate, to reach
The characteristics of being controlled to segmented.
To achieve the above object, the present invention provides the following technical solutions：
A kind of segmented control LED light string control system, including voltage sampling circuit, voltage compensating circuit and PID controls
Device processed, the voltage sampling circuit input terminal are connected to LED light string, and output end is connected to A/D moduluss of conversion by voltage transmitter
Block, the A/D conversion modules are connected to the PID controller；One in two input terminals of comparator is connected to voltage transmitter
Between A/D conversion modules, another is connected to the PID controller, output end and the electricity of the comparator by phase shifter
The input terminal connection of compensation circuit, the output end of the voltage compensating circuit is pressed to be connect with LED light string.
Preferably, the voltage sampling circuit includes voltage transformer pt, amplifier U1A and amplifier U2A；The voltage is mutual
The positive input terminal of sensor PT is connected with current-limiting resistance R1, and output end is connected to by antiparallel diode D1 and diode D2
The input terminal of amplifier U1A is connected with the both ends capacitance C2, the capacitance C2 between the inverting input and output end of amplifier U1A
It is parallel with slide-changing resistor R2 and slide-changing resistor R3, the slide-changing resistor R2 is serially connected with capacitance C1, slide-changing resistor R3 is serially connected with resistance
R4；The inverting input of the amplifier U2A is connected to the output end of amplifier U1A, homophase input by resistance R6 and resistance R5
End is connected with resistance R7 and resistance R8, and resistance R8 is shorted to output end；The one end resistance R6 is grounded by capacitance C5, the one end resistance R5
It is grounded by capacitance C3, while short circuit has capacitance C4 between amplifier U2A output ends.
Preferably, the voltage compensating circuit includes amplifier U3A；The input terminal of the amplifier U3A be connected with resistance R13 and
Resistance R14, resistance R13 are connected between series resistor R9 and series resistor R10, and resistance R14 is connected to series resistor R11 and string
Between connecting resistance R12, series resistor R9 and series resistor R10 latter terminations in parallel with series resistor R11 and series resistor R12
Ground；Be grounded by resistance R16 between resistance R13 and amplifier U3A inverting inputs, resistance R14 and amplifier U3A in-phase input ends it
Between the output end of amplifier U3A is connected to by resistance R17；The input pin of the amplifier U3A is inputted by resistance R15, output
Pin is exported by resistance R18.
Preferably, the PID controller uses ADuC848 chips.
Preferably, further include EEPROM, RS-232 serial ports and bluetooth module being connect with the PID controller.
Compared with prior art, the beneficial effects of the invention are as follows：Voltage between LED light string is first examined by voltage sampling circuit
It surveys, and is carried out this signal after being exported by linear scale by voltage transmitter, through A/D conversion modules, be sent into PID controller
Convert thereof into digital quantity；This digital quantity is through processing such as digital filtering, error correction, scale conversion, linear fits, by voltage value
Compared with by control (pressure difference between LED light string) actual value, according to the size of its deviation, control algolithm is supplied to carry out operation,
Last shifted device output determines pressure difference between LED light string through comparator, and by voltage compensating circuit, pressure difference carries out between LED light string
Compensation, to reach Discrete control purpose.
Description of the drawings
Fig. 1 is principle of the invention block diagram；
Fig. 2 is voltage sampling circuit schematic diagram of the present invention；
Fig. 3 is voltage compensating circuit schematic diagram of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
~3 are please referred to Fig.1, the present invention provides a kind of technical solution：
A kind of segmented control LED light string control system, including voltage sampling circuit, voltage compensating circuit and PID controls
Device processed, the voltage sampling circuit input terminal are connected to LED light string, and output end is connected to A/D moduluss of conversion by voltage transmitter
Block, the A/D conversion modules are connected to the PID controller；One in two input terminals of comparator is connected to voltage transmitter
Between A/D conversion modules, another is connected to the PID controller, output end and the electricity of the comparator by phase shifter
The input terminal connection of compensation circuit, the output end of the voltage compensating circuit is pressed to be connect with LED light string.
The PID controller uses ADuC848 chips, is based on pid control algorithm, handles more complex data and control function
Intelligent controller, so that it is can not only be used for independent single-chip computer control system, and can coordinate with external microcomputer and constitute two-step evolution
System has control accuracy high, has higher flexibility and reliability.
The voltage sampling circuit includes voltage transformer pt, amplifier U1A and amplifier U2A；The voltage transformer pt
Positive input terminal be connected with current-limiting resistance R1, output end is connected to amplifier by antiparallel diode D1 and diode D2
The input terminal of U1A is connected with the parallel connection of the both ends capacitance C2, the capacitance C2 between the inverting input and output end of amplifier U1A
There are slide-changing resistor R2 and slide-changing resistor R3, the slide-changing resistor R2 to be serially connected with capacitance C1, slide-changing resistor R3 is serially connected with resistance R4；Institute
The inverting input for stating amplifier U2A is connected to the output end of amplifier U1A, in-phase input end connection by resistance R6 and resistance R5
There are resistance R7 and resistance R8, resistance R8 to be shorted to output end；Resistance R6 and the both ends resistance R5 are grounded by capacitance C3 and capacitance C5,
Short circuit has capacitance C4 between amplifier U2A output ends simultaneously.
Using resistance R5 as front portion signal acquisition and rear portion signal condition, in signal acquisition part, voltage is mutual
Sensor PT is using current mode voltage transformer, it is ensured that actual rated current, R1 are current-limiting resistances, adjust the value of R1, make
Specified input current input is constant, meets use condition, secondary circuit is current/voltage converter circuit, resistance R4, slide-changing resistor
R3 is feedback effect, adjusts its resistance value and can be obtained required voltage output, capacitance C1 and can slide-changing resistor R2 be used for mending
Phase shift is repaid, capacitance C2 and capacitance C3 are used for decoupling and close filtering, and the diode D1 and diode D2 of two reversal connections play protection amplifier and make
With, amplifier U1A and amplifier U2A can reach higher accuracy and preferable stability with OP07, in signal condition part, fortune
It puts U2A, capacitance C4 and capacitance C5, resistance R6 and resistance R8 and constitutes low-pass filter, the voltage value for keeping acquisition next reaches and A/D
The voltage value to match is converted, A/D conversions are then carried out.
The voltage compensating circuit includes amplifier U3A；The input terminal of the amplifier U3A is connected with resistance R13 and resistance
R14, resistance R13 are connected between series resistor R9 and series resistor R10, and resistance R14 is connected to series resistor R11 and concatenation electricity
Between hindering R12, series resistor R9 and series resistor R10 latter end ground connection in parallel with series resistor R11 and series resistor R12；Electricity
It is grounded by resistance R16 between resistance R13 and amplifier U3A inverting inputs, is led between resistance R14 and amplifier U3A in-phase input ends
Cross the output end that resistance R17 is connected to amplifier U3A；The input pin of the amplifier U3A is inputted by resistance R15, output pin
It is exported by resistance R18.
Amplifier U3A uses LM348, input terminal 2 and input terminal 3, is correspondingly connected with two-way resistance in parallel：Resistance R9 and electricity all the way
Hinder R10 concatenations；Another way resistance R11 and resistance R12 concatenations；By output pin 11 by voltage output.
Further include EEPROM, RS-232 serial ports and bluetooth module being connect with the PID controller.
EEPROM is stored for signal, and RS-232 serial ports is used for external PC machine, and bluetooth module side is connect with just communication apparatus,
Convenient for being used for short-distance wireless communication control.
Voltage between each LED light string is first detected by voltage sampling circuit, and is carried out this signal by voltage transmitter
After pressing linear scale output, through A/D conversion modules, it is sent into PID controller and converts thereof into digital quantity；This digital quantity is through number
The processing such as filtering, error correction, scale conversion, linear fit, by voltage value and by control (pressure difference between LED light string) actual value ratio
Compared with according to the size of its deviation, control algolithm being supplied to carry out operation, last shifted device output determines LED through comparator
Pressure difference between lamp string, by voltage compensating circuit, pressure difference compensates between LED light string, operating power will not be caused excessive, after protection
Grade component controls purpose to reach system segment.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of segmented controls LED light string control system, including voltage sampling circuit, voltage compensating circuit and PID control
Device, it is characterised in that：The voltage sampling circuit input terminal is connected to LED light string, and output end is connected to by voltage transmitter
A/D conversion modules, the A/D conversion modules are connected to the PID controller；One in two input terminals of comparator is connected to electricity
Between pressure transmitter and A/D conversion modules, another is connected to the PID controller by phase shifter, the comparator it is defeated
The input terminal of outlet and voltage compensating circuit connects, and the output end of the voltage compensating circuit is connect with LED light string.
2. a kind of segmented according to claim 1 controls LED light string control system, it is characterised in that：The voltage is adopted
Sample circuit includes voltage transformer pt, amplifier U1A and amplifier U2A；The positive input terminal connection of the voltage transformer pt is limited
Leakage resistance R1, output end are connected to the input terminal of amplifier U1A, the amplifier by antiparallel diode D1 and diode D2
It is connected with the both ends capacitance C2, the capacitance C2 between the inverting input and output end of U1A and is parallel with slide-changing resistor R2 and sliding change
Resistance R3, the slide-changing resistor R2 are serially connected with capacitance C1, and slide-changing resistor R3 is serially connected with resistance R4；The reverse phase of the amplifier U2A is defeated
Entering the output end that end is connected to amplifier U1A by resistance R6 and resistance R5, in-phase input end is connected with resistance R7 and resistance R8,
Resistance R8 is shorted to output end；The one end resistance R6 is grounded by capacitance C5, and the one end resistance R5 is grounded by capacitance C3, at the same with fortune
Short circuit has capacitance C4 between putting U2A output ends.
3. a kind of segmented according to claim 1 controls LED light string control system, it is characterised in that：The voltage is mended
It includes amplifier U3A to repay circuit；The input terminal of the amplifier U3A is connected with resistance R13 and resistance R14, and resistance R13 is connected to concatenation
Between resistance R9 and series resistor R10, resistance R14 is connected between series resistor R11 and series resistor R12, series resistor R9
With series resistor R10 latter end ground connection in parallel with series resistor R11 and series resistor R12；Resistance R13 and amplifier U3A reverse phases are defeated
Enter and be grounded by resistance R16 between holding, amplifier is connected to by resistance R17 between resistance R14 and amplifier U3A in-phase input ends
The output end of U3A；The input pin of the amplifier U3A is inputted by resistance R15, and output pin is exported by resistance R18.
4. a kind of segmented according to claim 1 controls LED light string control system, it is characterised in that：The PID control
Device uses ADuC848 chips.
5. controlling LED light string control system according to a kind of segmented of Claims 1 to 4 any one of them, it is characterised in that：Also
Include EEPROM, RS-232 serial ports and bluetooth module being connect with the PID controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390494.2A CN107155236B (en) | 2017-05-27 | 2017-05-27 | A kind of segmented control LED light string control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390494.2A CN107155236B (en) | 2017-05-27 | 2017-05-27 | A kind of segmented control LED light string control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107155236A CN107155236A (en) | 2017-09-12 |
| CN107155236B true CN107155236B (en) | 2018-11-02 |
Family
ID=59792994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710390494.2A Active CN107155236B (en) | 2017-05-27 | 2017-05-27 | A kind of segmented control LED light string control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107155236B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038777Y (en) * | 2007-03-23 | 2008-03-19 | 桂林市嘉能能源科技有限公司 | Highly effective full-automatic reactive compensation equipment |
| CN202979383U (en) * | 2012-11-18 | 2013-06-05 | 飞秒光电科技(西安)有限公司 | LED-based driving power supply for sunshine-imitating light source |
| CN103917015A (en) * | 2014-03-10 | 2014-07-09 | 陕西亚成微电子股份有限公司 | High-voltage linear power voltage compensation circuit |
| CN204967280U (en) * | 2015-10-09 | 2016-01-13 | 宁波晨岚电气设备有限公司 | Reactive compensation controller |
| CN205213103U (en) * | 2015-11-12 | 2016-05-04 | 深圳Tcl数字技术有限公司 | Drive power supply and display device based on LLC topology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080100561A1 (en) * | 2006-10-31 | 2008-05-01 | Price Erin L | System and Method for Managing LED Backlight Performance in a Display |
-
2017
- 2017-05-27 CN CN201710390494.2A patent/CN107155236B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038777Y (en) * | 2007-03-23 | 2008-03-19 | 桂林市嘉能能源科技有限公司 | Highly effective full-automatic reactive compensation equipment |
| CN202979383U (en) * | 2012-11-18 | 2013-06-05 | 飞秒光电科技(西安)有限公司 | LED-based driving power supply for sunshine-imitating light source |
| CN103917015A (en) * | 2014-03-10 | 2014-07-09 | 陕西亚成微电子股份有限公司 | High-voltage linear power voltage compensation circuit |
| CN204967280U (en) * | 2015-10-09 | 2016-01-13 | 宁波晨岚电气设备有限公司 | Reactive compensation controller |
| CN205213103U (en) * | 2015-11-12 | 2016-05-04 | 深圳Tcl数字技术有限公司 | Drive power supply and display device based on LLC topology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107155236A (en) | 2017-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107168284B (en) | Device and method for automatically calibrating PLC analog output module | |
| CN205040065U (en) | Adjustable output current's constant voltage constant -current drive circuit | |
| CN111010767B (en) | Hybrid dimming driving circuit and method for detecting LED current and dimming by using same | |
| CN107155236B (en) | A kind of segmented control LED light string control system | |
| CN203365653U (en) | Low-cost battery electric quantity detection circuit | |
| CN105527520B (en) | Quick charger test macro and test method | |
| CN107317481A (en) | A kind of multistage DC DC converters, supply unit and display device | |
| CN108366448B (en) | One kind can just can negative logic LED light adjusting circuit and driving power | |
| CN201967214U (en) | Constant current driving circuit for LED (light-emitting diode) lamp | |
| CN108180416A (en) | One kind absorbs chromaticity coordinates and exports corresponding chromaticity coordinates height automatically shows finger light-source system | |
| CN109581180A (en) | A kind of IGBT module parallel temperature sensing circuit | |
| CN204065240U (en) | A kind of dry reactor performance test circuit and device | |
| CN103197224A (en) | Multichannel OLED (Organic Light Emitting Diode) life testing system based on Howland current pump | |
| CN103347346A (en) | High-efficiency LED driving circuit | |
| CN102944774A (en) | Automatic correction device and correction method for precision of analog quantity of power distribution terminal | |
| CN207166798U (en) | The control device of series resonance medium frequency heating power source | |
| CN114153259B (en) | Multichannel constant current source voltage regulating circuit and control method thereof | |
| CN107820346A (en) | A kind of biometrics multichannel Linear Control module, system and method | |
| CN106604441B (en) | A kind of the flow measurement circuit and method of LED drive power | |
| CN103648216A (en) | Intelligent constant-current high-power LED driving method | |
| CN103344800B (en) | Program-control electronic load for relay protection | |
| CN205946255U (en) | Omnipotent LED drive controller | |
| CN202217012U (en) | Microcurrent detection module | |
| CN208270661U (en) | Light digital relay protection tester | |
| CN109348603A (en) | The fast and stable constant source flowing system that double lamp failure diagnosis are automatically switched |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180914 Address after: 230601 Public Rental Building 102, North Export Processing Zone, East Binhe District, Qinglongtan Road, West Feiguang Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: The print intelligent technology limited of Hefei Jie Address before: 230088 room 412, innovation center, Anhui University science and Technology Park, 2 Tianda Road, high tech Zone, Hefei, Anhui. Applicant before: HEFEI KUTE INFORMATION TECHNOLOGY CO.,LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220901 Address after: No. 8, Xinyuan 1st Road, Phase II, Binhai Industrial Park, Xidian Town, Ninghai County, Ningbo City, Zhejiang Province, 315600 (self-declaration) Patentee after: NINGBO GAOLI ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 230601 Public Rental Building 102, North Export Processing Zone, East Binhe District, Qinglongtan Road, West Feiguang Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee before: The print intelligent technology limited of Hefei Jie |