CN106163000A - Driving and the method for detection of a kind of LED light - Google Patents
Driving and the method for detection of a kind of LED light Download PDFInfo
- Publication number
- CN106163000A CN106163000A CN201610582190.1A CN201610582190A CN106163000A CN 106163000 A CN106163000 A CN 106163000A CN 201610582190 A CN201610582190 A CN 201610582190A CN 106163000 A CN106163000 A CN 106163000A
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- depositor
- channel
- led light
- bus
- passage
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- 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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
Abstract
The present invention provides driving and the method for detection of a kind of LED light, drive according to channel-type dynamic scan and carry out electric current simultaneously, the way of voltage sample is carried out Real-time and Dynamic and is driven LED light emitting diode and the quality of detection LED light emitting diode, specifically by bus dbusConnect the depositor of data-interface and each channel interior；fbusBus is for synchronizing voltage ADC and the co-ordination of electric current ADC of each passage；diBus delivers to each channel current depositor for the collection result of electric current ADC；dvBus delivers to each channel voltage depositor for the collection result of voltage ADC；External microprocessor/microcontroller just can operate the depositor each paths of LEDs LED operation of driving of each passage by data-interface, understand LED LED operation state, thus the brightness of drive circuit solving tradition LED light emitting diode can not adjust and break down the shortcoming that can not feed back in time with LED light emitting diode.
Description
Technical field
The invention belongs to LED and control technical field, be specifically related to driving and the method for detection of a kind of LED light.
Background technology
The static drive method of traditional LED light emitting diode, by mu balanced circuit W, current-limiting resistance R, LED light emitting diode
FD and the electrical switch controlling to light and extinguish form K, when circuit design according to selected LED light emitting diode parameter
Determine the parameter that the mu balanced circuit W of drive circuit, current-limiting resistance R, electrical switch form.Circuit is simple, light emitting diode is bright
Degree can not adjust, and does not has real-time detection function, LED light emitting diode to break down and can not feed back in time.
The dynamic drive method of traditional LED light emitting diode, is improved on static drive circuit base and makes it have
There is overall brightness to control function, wherein add RC agitator and pre-divider, brilliance control depositor device, PWM control to deposit
Device, logical AND gate.Specific works principle is: with PWM controller as core, and the clock frequency of PWM controller is come to RC agitator
Resonant frequency frequency after pre-frequency dividing, the cycle of the pulsewidth of PWM is exactly to drive dynamically sweeping of all LED light emitting diodes
Retouching the cycle, the dutycycle of PWM determines the brightness of LED light emitting diode, and this dutycycle can be passed through brilliance control depositor, adjust
Whole.Although the light-emitting diode luminance of this dynamic drive method with integrated regulation, but can not accomplish independent brightness adjustment, do not have yet
Real-time detection function, LED light emitting diode breaks down and can not feed back in time.
Summary of the invention
The technical problem to be solved is: existing LED light driving method exists can not detect institute automatically
Driving the quality of LED light, in some occasion, display lamp once lost efficacy and system can not be allowed in time to learn, it is possible to make
Become unnecessary loss.
For solving the problems referred to above, the technical solution adopted in the present invention is: propose a kind of LED light emitting diode lamp
Driving and the method for detection, foundation channel-type dynamic scan drives and carries out electric current simultaneously, the way of voltage sample is moved in real time
State drives LED light emitting diode and the quality of detection LED light emitting diode.
Concrete driving is as follows with detection method:
Include in each driving passage provided by the present invention: rate of scanning depositor, channel luminance depositor, channel switching are deposited
Device, LED drive passage, channel current depositor and channel voltage depositor；Include outside each passage: electric current ADC, voltage ADC,
RC agitator, pre-divider, data-interface and common part；Use data/address bus connected mode, channel interior data/address bus and
Data/address bus outside each passage is connected, and every depositor of all passages has unique reference address, through address choice
Corresponding depositor, carries out the data access to this depositor.
Described rate of scanning depositor, for producing dynamic scan frequency f that this channel LED light emitting diode drivesled0,
fled0=fbusThe numerical value of/rate of scanning depositor.
Described channel luminance depositor, for controlling the brightness of this channel LED light emitting diode, moves by adjusting this passage
State scan period T=1/fled0, the ratio of interior low and high level realizes；Channel luminance depositor digital scope is 0 ~ 100, works as number
When value is 0, this display brightness is 0；Numerical value is 100 to be to show the brightest, and during its remainder values n, display brightness is the most highlighted n/
100。
Described channel switching depositor, controls opening and closing of driving for LED, is additionally responsible for the electricity outside synchronizing
Stream ADC, voltage ADC carry out the collection of the voltage and current of the LED light emitting diode of this passage.
Described channel current depositor, for storing the current value of this driving LED light emitting diode of this passage.
Described channel voltage depositor, for storing the magnitude of voltage of this driving LED light emitting diode of this passage.
Described system data bus Dbus, by the rate of scanning depositor of each passage, channel luminance depositor, channel switching
Depositor, channel current depositor, channel voltage depositor link together with the data-interface of system.Though between each depositor
So it is connected by data/address bus, but after having to pass through the corresponding address choice of depositor, bus could access selected posting
The data of storage, can not carry out the exchanging visit of data between depositor.
Described RC agitator combines pre-divider and produces the Bus Clock Rate f that system needsbus；In each passage of system
Depositor and public electric current ADC, voltage ADC, data-interface be all based on Bus Clock Rate fbusOn the basis of work.
The data-interface of described system, the data-interface of the same external microcontroller chip/microprocessor of drive system, by this
Interface microcontroller/microprocessor can access the various depositors of internal system, initializes systematic parameter, arranges system drive
Outside LED light emitting diode frequency and brightness；System each channel voltage depositor can be read and channel current depositor obtains
External LED light emitting diode driving voltage current parameters on this passage obtained, promising control system judges this light-emitting diodes automatically
Pipe parameter the most normally works.
Multi-channel LED drives and the system of detection, the logical structure relation between all passages of system: by bus dbusEven
Connect the depositor of data-interface and each channel interior；fbusBus is for synchronizing each passage, voltage ADC and the coordination of electric current ADC
Work；diBus delivers to the channel current depositor of each passage for the collection result of electric current ADC；dvBus is for voltage ADC's
Collection result delivers to the channel voltage depositor of each passage；External microprocessor/microcontroller just can be operated by data-interface
The depositor of each passage drives each paths of LEDs LED operation, understands LED LED operation state.
The invention has the beneficial effects as follows: provide a kind of can the low cost of timely and effective detection LED light working condition
Drive and the method for detection, the brightness of drive circuit solving tradition LED light emitting diode can not adjust and LED luminescence two
Pole pipe breaks down the shortcoming that can not feed back in time.
Accompanying drawing explanation
Fig. 1 is the static drive method schematic diagram of traditional LED light emitting diode；
Fig. 2 is the dynamic drive method schematic diagram of traditional LED light emitting diode；
Fig. 3 is that first LED light emitting diode drives " passage 0 " system entirety principle schematic；
Fig. 4 is that multi-channel LED drives and the system entirety principle schematic of detection；
In figure: fbus: Bus Clock Rate；Dbus: system data bus.
Detailed description of the invention
The static drive method of traditional LED light emitting diode as shown in Figure 1, 2, provided by the present invention driving detection side
Method, drives by first LED light emitting diode and illustrates as a example by " passage 0 ", and system construction drawing is as shown in Figure 3.
Include in this driving passage 0: rate of scanning depositor, channel luminance depositor, channel switching depositor, LED drive
Dynamic passage, channel current depositor and channel voltage depositor；Include outside passage 0: electric current ADC, voltage ADC, RC agitator,
Pre-divider, data-interface and common part.
System data bus Dbus, as in Fig. 3, runic is black shown in solid, by bright to the rate of scanning depositor of each passage, passage
Degree depositor, channel switching depositor, channel current depositor, channel voltage depositor are connected to one with the data-interface of system
Rise.
Wherein, rate of scanning depositor is for producing dynamic scan frequency f that this channel LED light emitting diode drivesled0,
fled0=fbusThe numerical value of/rate of scanning depositor；The brightness of this channel LED light emitting diode of channel luminance register controlled, passes through
Adjust this passage dynamic scan cycle T=1/fled0, the ratio of interior low and high level realizes, channel luminance depositor digital scope
Being 0 ~ 100, when numerical value is 0, this display brightness is 0,100 to be to show the brightest, and during its remainder values n, display brightness is the most highlighted
N/100；LED being opened by what channel switching register controlled drove and being closed, and channel switching depositor is also responsible for same in addition
Electric current ADC outside Bu, voltage ADC carry out the collection of the voltage and current of the LED light emitting diode of this passage；Channel current is posted
Storage stores the current value of this driving LED light emitting diode of this passage；Channel voltage depositor stores this of this passage
Drive the magnitude of voltage of LED light emitting diode.
RC agitator combines pre-divider and produces the Bus Clock Rate f that system needsbus；Posting in each passage of system
Storage rate of scanning depositor, channel luminance depositor, channel switching depositor and public electric current ADC, voltage ADC, data
Interface is all based on Bus Clock Rate fbusOn the basis of work.
Data-interface: the data-interface of the same external microcontroller chip/microprocessor of drive system, by this interface microcontroller
Device/microprocessor can access the various depositors of internal system, initializes systematic parameter, arranges the LED outside system drive
Light emitting diode frequency and brightness；System each channel voltage depositor and this passage of channel current depositor acquisition can be read
Upper external LED light emitting diode driving voltage current parameters, whether promising control system judges this light emitting diode parameter automatically
Normal work.
Multi-channel LED drives the system entirety principle with detection as shown in Figure 4, the logical structure between all passages of system
Relation: by bus dbusConnect the depositor of data-interface and each channel interior；fbusBus is for synchronizing each passage, voltage
ADC and the co-ordination of electric current ADC；diBus delivers to the channel current depositor of each passage for the collection result of electric current ADC；
dvBus delivers to the channel voltage depositor of each passage for the collection result of voltage ADC；External microprocessor/microcontroller is just
The depositor each paths of LEDs LED operation of driving of each passage can be operated by data-interface, understand LED light-emitting diodes plumber
Make state.
Claims (3)
1. the driving and the method for detection an of LED light, it is characterised in that drive according to channel-type dynamic scan and simultaneously
Carry out electric current, voltage sample Real-time and Dynamic drives LED light emitting diode and detection LED light emitting diode；
The LED light provided includes in respectively driving passage: rate of scanning depositor, channel luminance depositor, channel switching
Depositor, LED drive passage, channel current depositor and channel voltage depositor；Include outside each passage: electric current ADC, voltage
ADC, RC agitator, pre-divider, data-interface and common part；
The rate of scanning depositor of described each passage, channel luminance depositor, channel switching depositor, channel current depositor,
Channel voltage depositor passes through system data bus, links together with the data-interface of system；
The data-interface of described system, the data-interface of the same external microcontroller chip/microprocessor of drive system, by this interface
Access the various depositors of internal system；The driving voltage electricity of reading system each channel voltage depositor and channel current depositor
Stream parameter；
Described RC agitator combines pre-divider and produces the Bus Clock Rate f that system needsbus；
Described rate of scanning depositor produces dynamic scan frequency f that this channel LED light emitting diode drivesled0；
The brightness of described this channel LED light emitting diode of channel luminance register controlled；
Described channel switching depositor, controls opening and closing of driving, electric current ADC, the voltage ADC outside synchronization for LED
Carry out the collection of the voltage and current of the LED light emitting diode of this passage；
Described rate of scanning depositor produces dynamic scan frequency f that this channel LED light emitting diode drivesled0=fbus/ scanning frequency
The numerical value of rate depositor；
Concrete methods of realizing is: the data-interface of described system, the data of the same external microcontroller chip/microprocessor of drive system
Interface, can access the various depositors of internal system by this interface microcontroller/microprocessor, initialize systematic parameter,
LED light emitting diode frequency outside system drive and brightness are set；System each channel voltage depositor and passage can be read
External LED light emitting diode driving voltage current parameters on this passage that electric current depositor obtains, promising control system is sentenced automatically
This light emitting diode parameter fixed the most normally works.
The driving of a kind of LED light the most according to claim 1 and detection, it is characterised in that described channel luminance is posted
Storage, by adjusting this passage dynamic scan cycle T=1/fled0, channel luminance depositor digital scope is 0 ~ 100, works as numerical value
When being 0, this display brightness is 0；Numerical value is 100 to be to show the brightest, and during its remainder values n, display brightness is the most highlighted n/100.
The driving of a kind of LED light the most according to claim 1 and detection, it is characterised in that multi-channel LED drive with
The system of detection: by bus dbusConnect the depositor of data-interface and each channel interior；fbusBus for synchronize each passage,
Voltage ADC and the co-ordination of electric current ADC；diThe channel current that bus delivers to each passage for the collection result of electric current ADC is posted
Storage；dvBus delivers to the channel voltage depositor of each passage for the collection result of voltage ADC；External microprocessor/micro-control
Device processed just can operate the depositor each paths of LEDs LED operation of driving of each passage by data-interface, understands LED luminescence two
Pole pipe duty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610582190.1A CN106163000B (en) | 2016-07-22 | 2016-07-22 | A kind of method of the driving and detection of LED light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610582190.1A CN106163000B (en) | 2016-07-22 | 2016-07-22 | A kind of method of the driving and detection of LED light |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106163000A true CN106163000A (en) | 2016-11-23 |
| CN106163000B CN106163000B (en) | 2018-08-17 |
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ID=58060274
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610582190.1A Expired - Fee Related CN106163000B (en) | 2016-07-22 | 2016-07-22 | A kind of method of the driving and detection of LED light |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459993A (en) * | 2007-12-14 | 2009-06-17 | 深圳迈瑞生物医疗电子股份有限公司 | Background lamp apparatus for control panel and control apparatus thereof |
| CN103582263A (en) * | 2013-11-14 | 2014-02-12 | 上海莱托思电子科技有限公司 | Linear multi-channel LED constant-current drive circuit |
| CN103728578A (en) * | 2014-01-10 | 2014-04-16 | 美芯晟科技（北京）有限公司 | Demagnetization detection method, demagnetization detection circuit and constant current driver applying demagnetization detection circuit |
| CN105163437A (en) * | 2015-09-09 | 2015-12-16 | 江门市蓬江区艾智家光电科技有限公司 | 16-channel constant current LED (light emitting diode) driver chip |
| US20160128155A1 (en) * | 2014-10-31 | 2016-05-05 | Juno Manufacturing, LLC | Solid state lighting fixture with incandescent dimming characteristics |
| US20160165681A1 (en) * | 2014-12-08 | 2016-06-09 | Hubbell Incorporated | High-End Trim Control of Lighting Fixtures |
-
2016
- 2016-07-22 CN CN201610582190.1A patent/CN106163000B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459993A (en) * | 2007-12-14 | 2009-06-17 | 深圳迈瑞生物医疗电子股份有限公司 | Background lamp apparatus for control panel and control apparatus thereof |
| CN103582263A (en) * | 2013-11-14 | 2014-02-12 | 上海莱托思电子科技有限公司 | Linear multi-channel LED constant-current drive circuit |
| CN103728578A (en) * | 2014-01-10 | 2014-04-16 | 美芯晟科技（北京）有限公司 | Demagnetization detection method, demagnetization detection circuit and constant current driver applying demagnetization detection circuit |
| US20160128155A1 (en) * | 2014-10-31 | 2016-05-05 | Juno Manufacturing, LLC | Solid state lighting fixture with incandescent dimming characteristics |
| US20160165681A1 (en) * | 2014-12-08 | 2016-06-09 | Hubbell Incorporated | High-End Trim Control of Lighting Fixtures |
| CN105163437A (en) * | 2015-09-09 | 2015-12-16 | 江门市蓬江区艾智家光电科技有限公司 | 16-channel constant current LED (light emitting diode) driver chip |
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| Publication number | Publication date |
|---|---|
| CN106163000B (en) | 2018-08-17 |
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