CN103604103A - LED module and recognition device and recognition method of LED module - Google Patents
LED module and recognition device and recognition method of LED module Download PDFInfo
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- CN103604103A CN103604103A CN201310641182.6A CN201310641182A CN103604103A CN 103604103 A CN103604103 A CN 103604103A CN 201310641182 A CN201310641182 A CN 201310641182A CN 103604103 A CN103604103 A CN 103604103A
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Abstract
The invention discloses an LED module and a recognition device and recognition method of the LED module. The LED module comprises a shell, an identification resistor is arranged in the LED module, two detecting points are arranged on the shell, and the two detecting points are connected with the two ends of the identification resistor respectively. The recognition device of the LED module comprises a voltage dividing circuit, and the voltage dividing circuit is provided with two branch voltage connecting points and further comprises a detecting circuit, wherein the two branch voltage connecting points are correspondingly connected with the detecting points to be detected of the LED module, and the detecting circuit detects and outputs the branch voltage value of the voltage dividing circuit. According to the LED module and the recognition device and the recognition method of the LED module, through the fact that the LED module is provided with the identification resistor and the detecting points, the type of the LED module can be automatically recognized by using the recognition device for the LED module conveniently, a controller can automatically select a corresponding driving mode to drive the LED module according to the type of the module, the problems of low efficiency and inconvenient using due to the fact that the driving method of the LED module needs to be set manually are solved, and the intelligent degree of the control over the LED module is improved.
Description
Technical field
The invention belongs to lighting source applied technical field, specifically, relate to LED module and recognition device thereof and recognition methods.
Background technology
LED street lamp application is more and more now, and the design of LED modularity is becoming a kind of scheme of standard, because the LED street lamp after modularity can reach by special control method the object of the further saving energy.
In actual applications, different LED modules have different power requirements conventionally, and controller need to be set different type of drive according to different LED module.Although this setting can be undertaken by manual type, efficiency is low, once need to change LED module, just need to re-start setting, uses extremely inconvenience, and intelligent degree is lower.
Summary of the invention
The object of this invention is to provide a kind of LED module and recognition device and recognition methods, realize the automatic identification of LED module, be convenient to controller and automatically set the type of drive of corresponding module according to recognition result.
For achieving the above object, LED module provided by the invention adopts following technical proposals to be achieved:
A LED module, comprises housing, in described LED module, is provided with sign resistance, is provided with two test points on described housing, and described two test points are connected with the two ends of described sign resistance respectively.
For realizing aforementioned goal of the invention, LED module recognition device provided by the invention adopts following technical proposals to realize:
A kind of LED module recognition device of above-mentioned LED module, described recognition device comprises bleeder circuit, described bleeder circuit has two dividing potential drop access points with the corresponding connection of test point of LED module to be identified, and described recognition device also comprises the testing circuit of the partial pressure value that detects and export described bleeder circuit.
Preferably, described bleeder circuit is resistor voltage divider circuit, and described resistor voltage divider circuit includes basis point piezoresistance, and described basis point piezoresistance one end connects positive source, the other end connects a described dividing potential drop access point, and described in another, dividing potential drop access point connects power supply ground; Described testing circuit is voltage detecting circuit, two test sides of described voltage detecting circuit respectively with two corresponding connections of described dividing potential drop access point.
LED module recognition device as above, described recognition device also includes the controller of output LED driving current signal, and the output of described testing circuit is connected with the input of described controller.
For realizing aforementioned goal of the invention, LED module identification method provided by the invention adopts following technical proposals to realize:
A LED module identification method for LED module recognition device based on above-mentioned, described method comprises the steps:
LED module recognition device works on power, and according to the output voltage of testing circuit in LED module recognition device, has judged whether the access of LED module;
When judging access LED module, according to the output voltage of described testing circuit, tentatively determine module type;
According to preliminary definite module type, for this LED module, apply corresponding drive current initial value, then, on described initial value basis, increase gradually the drive current of LED module, in this process, read the real work electric current of LED module;
If real work electric current meets the curent change of the type LED module, determine that LED module type is for preliminary definite type; Otherwise, stop as LED module applies drive current, and output alarm signal.
Preferably, when tentatively determining module type according to the output voltage of described testing circuit, according to setting sample frequency, read the output voltage values of a plurality of described testing circuits, calculate the mean value of a plurality of output voltage values, according to mean value, tentatively determine module type.
Compared with prior art, advantage of the present invention and good effect are: the present invention is by arranging sign resistance and test point for LED module, LED recognition device easy to use automatically identifies LED module type, make the controller of driving LED module automatically to select corresponding type of drive driving LED module according to module type, avoided needing the driving method problem of the artificial LED of setting module, the problem includes: low, the awkward problem of efficiency has improved the intelligent degree that LED module is controlled.And by recognition methods identification LED module of the present invention, identification accuracy is high.
Read by reference to the accompanying drawings after the specific embodiment of the present invention, it is clearer that the other features and advantages of the invention will become.
Accompanying drawing explanation
Fig. 1 is the structure diagram of an embodiment of LED module of the present invention;
Fig. 2 is the structured flowchart of an embodiment of LED module recognition device of the present invention;
Fig. 3 is the flow chart of an embodiment of LED module identification method of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail.
Refer to Fig. 1, this figure is depicted as the structure diagram of an embodiment of LED module of the present invention.
As shown in Figure 1, the LED module of this embodiment, except having a plurality of LED light emitting diodes, is provided with two test point a and b on its housing, and portion is provided with sign resistance R 1 within it, and the two ends of sign resistance R 1 are connected with test point b with test point a respectively.Resistance value and the LED module of sign resistance R 1 be corresponding, the type of reacting LED module one by one, requires the LED module of different driving mode to have different sign resistances, and the LED module of identical type of drive has identical sign resistance.
Refer to Fig. 2, the figure shows the structured flowchart of an embodiment of LED module recognition device of the present invention.Wherein, this recognition device is for identifying a kind of device of the LED module of structure shown in Fig. 1, that is to say a kind of device for identification with the LED module of built-in sign resistance.
As shown in Figure 2, the LED module recognition device of this embodiment includes bleeder circuit, testing circuit and two dividing potential drop access point c and d.Wherein, bleeder circuit includes basis point piezoresistance R2, and one end of basis point piezoresistance R2 connects positive source VDD, and its other end connects dividing potential drop access point c, and dividing potential drop access point d is connected with power supply ground GND.And testing circuit is voltage detecting circuit, two test side is connected with dividing potential drop access point c is corresponding with d respectively.
In addition, LED module recognition device can also include controller, and this controller is for controlling the main controller of LED module, can export LED driving current signal to LED module.The output of voltage detecting circuit is connected with an input of controller.
While applying the LED module recognition device identification LED module of this embodiment, by two test point a of LED module and b respectively with two are connected corresponding with d of dividing potential drop access point c of LED module recognition device, then adopt certain recognition methods, just can identify the type of accessed LED module.Concrete recognition methods please refer to shown in Fig. 3 flow chart and the following description to Fig. 3 flow process.
Refer to Fig. 3, this figure is depicted as the flow chart of an embodiment of LED module identification method of the present invention.The LED module recognition device of this flow process based on shown in Fig. 2 is the flow process that LED module recognition device is identified the type of the LED module accessing.
As shown in Figure 3, in conjunction with illustrated in Figure 2, the process that this embodiment identifies LED module type is as follows:
Step 301:LED module recognition device works on power.
When using LED module recognition device, first power on and initialize afterwards, then start working.
Step 302: the output voltage that reads testing circuit.
If read the output voltage of testing circuit by controller, need first output voltage to be carried out to analog-to-digital conversion, then digital quantity is inputed in controller.
Step 303: judged whether the access of LED module according to the output voltage reading.If have, perform step 304; Otherwise, continue the step that execution step 302 reads output voltage.
The LED module recognition device of Fig. 2 of take is example, if do not access LED module, the voltage that testing circuit is exported is that supply voltage VDD(is also that output voltage is maximum).If access LED module, the output voltage of testing circuit is the dividing potential drop in resistance R 1, is less than supply voltage VDD.Therefore, can, by comparing the output voltage of testing circuit and the size of supply voltage VDD, judge whether the access of LED module.If have the access of LED module, continue follow-up identifying; If access, does not continue to read output voltage, until there is the access of LED module.
Step 304: if there is the access of LED module, read continuously a plurality of output voltage values, calculate the mean value of a plurality of output voltage values.
When being determined with the access of LED module, the output voltage of testing circuit is the partial pressure value of resistance R 1.On the definite basis of the resistance of supply voltage VDD and basis point piezoresistance R2, can calculate according to partial pressure value the resistance of resistance R 1.And then, according to the sign resistance of resistance R 1 and the corresponding relation of LED module type, can identify the type of current LED module.Therefore,, for identifying LED module type, first need to obtain the output voltage values of testing circuit.
For avoiding single value to cause error in judgement, this embodiment is when obtaining output voltage values, employing is read continuously a plurality of output voltage values, is calculated the mean value of a plurality of output voltage values as the means of judgment standard magnitude of voltage, to improve recognition accuracy according to setting proportion.
Step 305: judge that mean value is whether in effective range.If so, perform step 306; Otherwise, go to step 302, again read output voltage.
General, LED module number of types is limited,, after its access LED module recognition device, the branch pressure voltage value that testing circuit is exported is also within a general scope.For improving recognition speed, can preset an effective range, if output voltage values not within this effective range, illustrate that causing the reason that the output voltage of testing circuit changes not is because of having accessed LED module.For this kind of situation, do not need to carry out again follow-up processing procedure, to save recognition time.
Step 306: after judging that output voltage average value is in effective range, tentatively determine module type according to mean value.
As previously mentioned, after LED module recognition device access LED module, there is relation one to one in the type of the output voltage of testing circuit and LED module.Can pre-stored this corresponding relation, then, from this corresponding relation, obtain the LED module type corresponding with output voltage average value, and using this module type as preliminary definite module type.Also, also need module type to do further to determine, to prevent exporting inappropriate LED drive current, damage LED module with type erroneous judgement.
Step 307: apply drive current initial value according to preliminary definite module type.
After module type is determined, its needed type of drive is also just definite, and its drive current rated value has also been determined.For further confirmation module type, first according to preliminary definite module type, obtain the nominal drive current of corresponding LED module, then utilize controller to export a drive current initial value in LED module according to nominal drive current, driving LED module is worked.Here, drive current initial value is a value that is less than nominal drive current, and for example, half that can select nominal drive current is as initial value.
Step 308: increase gradually drive current on the basis of drive current initial value, read the real work electric current of LED module in this process.
While increasing drive current, notice that maximum is increased to nominal drive current, in case stop loss bad LED module.And, by selecting a lower drive circuit initial value, then on this value basis, increasing gradually drive current, can prevent to the full extent burning out LED module because of false judgment.
Step 309: judge that whether real work electric current is normal.If normal, perform step 311; Otherwise, perform step 310.
Judge that whether real work electric current is normal, mainly refer to and judge whether the real work electric current of LED module meets the curent change of the type LED module.If module type correct judgment, when applying correct drive current, its actual operating current abnormal conditions such as can not undergo mutation, but change according to the variation of drive current is corresponding.And if the misjudgment of module type, so for its drive current applying is not its running current, can cause that its operating current is undergone mutation etc. and not meet the situation of normal current Changing Pattern.
Step 310: if LED module real work current anomaly illustrates preliminary definite module type error, stop applying drive current, to prevent from burning out LED module.Meanwhile, output alarm signal, carries out alarm.
Step 311: if LED module real work electric current is normal, judge that preliminary definite module type is correct, also judge that current LED module type is as preliminary definite type, identifying finishes.Controller can be carried out corresponding driving to LED module according to recognition result and control.
Adopt said method identification LED module, not only can remove all kinds of obstacles, improve recognition accuracy, and, can also avoid to the full extent the mistake that wrong identification is brought LED module drive and damage.
Above embodiment is only in order to technical scheme of the present invention to be described, but not is limited; Although the present invention is had been described in detail with reference to previous embodiment, for the person of ordinary skill of the art, the technical scheme that still can record previous embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention's technical scheme required for protection.
Claims (6)
1. a LED module, comprises housing, it is characterized in that, in described LED module, is provided with sign resistance, is provided with two test points on described housing, and described two test points are connected with the two ends of described sign resistance respectively.
2. the LED module recognition device based on LED module claimed in claim 1, it is characterized in that, described recognition device comprises bleeder circuit, described bleeder circuit has two dividing potential drop access points with the corresponding connection of test point of LED module to be identified, and described recognition device also comprises the testing circuit of the partial pressure value that detects and export described bleeder circuit.
3. LED module recognition device according to claim 2, it is characterized in that, described bleeder circuit is resistor voltage divider circuit, described resistor voltage divider circuit includes basis point piezoresistance, described basis point piezoresistance one end connects positive source, the other end connects a described dividing potential drop access point, and described in another, dividing potential drop access point connects power supply ground; Described testing circuit is voltage detecting circuit, two test sides of described voltage detecting circuit respectively with two corresponding connections of described dividing potential drop access point.
4. according to the LED module recognition device described in claim 2 or 3, it is characterized in that, described recognition device also includes the controller of output LED driving current signal, and the output of described testing circuit is connected with the input of described controller.
5. a LED module identification method for the LED module recognition device based on described in any one in the claims 2 to 4, is characterized in that, described method comprises the steps:
LED module recognition device works on power, and according to the output voltage of testing circuit in LED module recognition device, has judged whether the access of LED module;
When judging access LED module, according to the output voltage of described testing circuit, tentatively determine module type;
According to preliminary definite module type, for this LED module, apply corresponding drive current initial value, then, on described initial value basis, increase gradually the drive current of LED module, in this process, read the real work electric current of LED module;
If real work electric current meets the curent change of the type LED module, determine that LED module type is for preliminary definite type; Otherwise, stop as LED module applies drive current, and output alarm signal.
6. LED module identification method according to claim 5, it is characterized in that, when tentatively determining module type according to the output voltage of described testing circuit, according to setting sample frequency, read the output voltage values of a plurality of described testing circuits, calculate the mean value of a plurality of output voltage values, according to mean value, tentatively determine module type.
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| CN201310641182.6A CN103604103A (en) | 2013-12-04 | 2013-12-04 | LED module and recognition device and recognition method of LED module |
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| CN104113962A (en) * | 2014-05-04 | 2014-10-22 | 麦克奥迪实业集团有限公司 | Different LED illumination modules judged according to voltage |
| CN105409055A (en) * | 2014-05-19 | 2016-03-16 | 华为技术有限公司 | Battery and circuit |
| CN106409194A (en) * | 2016-08-25 | 2017-02-15 | 广西小草信息产业有限责任公司 | LED lamp detection system and method |
| CN113539189A (en) * | 2021-06-16 | 2021-10-22 | 深圳市国显科技有限公司 | Method for identifying backlight module ID, backlight module and display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104113962A (en) * | 2014-05-04 | 2014-10-22 | 麦克奥迪实业集团有限公司 | Different LED illumination modules judged according to voltage |
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| CN106409194A (en) * | 2016-08-25 | 2017-02-15 | 广西小草信息产业有限责任公司 | LED lamp detection system and method |
| CN113539189A (en) * | 2021-06-16 | 2021-10-22 | 深圳市国显科技有限公司 | Method for identifying backlight module ID, backlight module and display device |
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