CN201048461Y - Adjustable constant current device of LED module - Google Patents
Adjustable constant current device of LED module Download PDFInfo
- Publication number
- CN201048461Y CN201048461Y CNU2007201537071U CN200720153707U CN201048461Y CN 201048461 Y CN201048461 Y CN 201048461Y CN U2007201537071 U CNU2007201537071 U CN U2007201537071U CN 200720153707 U CN200720153707 U CN 200720153707U CN 201048461 Y CN201048461 Y CN 201048461Y
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Abstract
The utility model provides an adjustable current stabilizing device, which is serially connected in a loop of a LED module and a DC electrical source. The utility model includes more than one serial resistor. A contact point is arranged across the two ends of each resistor, the on-off of the contact point determines whether the LED module can be cut-in the loop of the electrical source for adjusting the current. Using the design, the forward voltage value, which is actually measured by a visible LED module, can permit the resistance with matching resistance value to be cut-in the loop so as to meet the specification of the current of the LED and the specification of the total current of the product.
Description
Technical field
The utility model is the current device of deciding about a kind of light-emitting diode (LED) module, refers to especially a kind ofly can measure the current device of deciding that characteristic is adjusted current specification at random according to reality.
Background technology
Because light-emitting diode has advantages such as power saving, long, low used heat of life-span, successfully extends across foot to people's livelihood purposes by industrial use in recent years.For the brightness that promotes light-emitting diode reaches to a certain degree, be concatenated into module by most light-emitting diodes mostly, optionally make again after most module parallel connections to produce the light of enough brightness.
Promptly disclose the conspectus of a light-emitting diode (LED) module as Fig. 3, most light-emitting diode (LED) modules 70 of its order are powered by a direct current power supply VC under paralleling model, and each light-emitting diode (LED) module 70 is made up of most light-emitting diodes serial connections.Under aforementioned framework in parallel, answer symbolic animal of the birth year together in theory by the electric current of each light-emitting diode (LED) module 70, but the fact not so, reason is: light-emitting diode may be because of the difference of chip itself or encapsulation process, cause the forward very big drop of voltage VF value, generally speaking, the about 1.8～2.8V of VF value of red/yellow class light-emitting diode, the about 2.8～4.0V of VF value of Huang/indigo plant/white light emitting diode.Because VF value inequality, so that the electric current excursion of aforementioned light-emitting diode (LED) module is quite big.Solve aforementioned currents and change greatly different problem, the most direct method is that the resistance R 1～RN that makes a resistance be matched with the VF value is serially connected with on the circuit loop of light-emitting diode (LED) module 70, so as to regulating the electric current on each road light-emitting diode (LED) module 70, and then meet product total current specification.
But the aforementioned practice tend to because of the detected value of product manufacturing after finishing different with former design, so that must after product be finished, spend a large amount of manpowers and change resistance, to meet the requirement of current specification, certainly will influence production efficiency under the situation in this way, and manufacturing cost is improved relatively.
As shown in Figure 4, be to have the light-emitting diode (LED) module of deciding the electric current measure, current technique is decided in main employing simulation, and the electric current that it utilizes a current detection circuit 81 to detect on the loops sees through a current control circuit 82 again and carries out deciding Current Control.The advantage of the aforementioned practice is to differentiate the VF value of light-emitting diode automatically, and then adjusts the output voltage of DC power supply VC automatically, makes electric current be tending towards fixing.But shortcoming is the circuit structure complexity, and the assembly cost is higher, for the light-emitting diode product of low unit price, and does not meet cost benefit.
The utility model content
From the above, existing light-emitting diode product still treats further to seek more economical practical solution seeking to face the problems such as expense consuming time and technical costs costliness of mending the fold after the sheep is lost respectively on the fixing problem of electric current.
Therefore, the utility model main purpose is adjustablely decided current device what a kind of light-emitting diode (LED) module was provided, and it can be after the manufacturing of light-emitting diode product be finished, according to selectively regulating loop impedance of actual characteristic, to meet current specification, its technical costs is cheap and simple and practical.
For reaching the major technique means that aforementioned purpose takes is to make certain current device be serially connected with on the electric power loop of light-emitting diode (LED) module, and this is decided current device and comprises:
Most the resistance that are connected in series mutually;
A most contact are that cross-over connection respectively is in the two ends of each resistance;
Utilize the corresponding resistance that connects of break-make decision of contact whether to cut the loop, as the usefulness of adjusting electric current; By these designs, can be according to the forward magnitude of voltage of the actual measurement of light-emitting diode (LED) module gained, the quantity of decision incision resistance at random and selectively, thus, not only implement simple and easy, and technical costs is cheap, seeks the problem that electric current is met with fixedly the time and effectively solve existing light-emitting diode product.
Described contact is a normal opened contact.
Described contact is made of relative solder joint, connects in jumper connection JUMPER mode.
Described contact is a normally closed contact.
Described contact is to be made of a switch.
Enforcement door of the present utility model is low, and not only cost is low and simple and practical, and efficiently solves the light-emitting diode (LED) module product in the problem of deciding to be met with on the electric current problem.
Description of drawings
Fig. 1: the circuit diagram that is the utility model one preferred embodiment;
Fig. 2: the circuit diagram that is the another preferred embodiment of the utility model;
Fig. 3: the conspectus that is traditional light-emitting diode (LED) module;
Fig. 4: the constant-current circuit calcspar that is traditional light-emitting diode (LED) module.
The primary clustering symbol description
10 light-emitting diode (LED) modules 20,20 ' are decided current device
70 light-emitting diode (LED) modules
81 current detection circuits, 82 current control circuits
Embodiment
As shown in Figure 1, announcement has the conspectus of the utility model one preferred embodiment, mainly be that most light-emitting diode (LED) modules 10 of order are powered by a direct current power supply VC under paralleling model, each light-emitting diode (LED) module 10 is connected in series with certain current device 20 respectively again, and this is decided current device 20 and includes:
Most the resistance R 1～RN that are connected in series mutually;
Most contact J1～JN are that cross-over connection respectively is in the two ends of each resistance R 1～RN; In present embodiment, these contacts J1～JN connects solder joint (PAD) by two relative skies and is constituted, in present embodiment, it is to be the open circuit shape that these skies connect under the solder joint normality, when arbitrary contact sky connects, be to make its corresponding resistance incision loop that connects, if during arbitrary contact short circuit, promptly provide a bypass path of walking around resistance to the loop, this resistance is not cut the loop then.Aforementionedly connecing the contact that solder joint constitutes with sky, is to make its connection in the wire jumper mode.
Seeing also Fig. 2 again shows, it is the another preferred embodiment of the utility model, its general architecture is identical with last embodiment, still on the electric power loop of light-emitting diode (LED) module 10, be connected in series certain current device 20 ' respectively, should decide current device 20 ' and still comprise most the resistance R 1～RN of serial connection mutually, the two ends of each resistance R 1～RN constitute a contact S1～SN respectively, in present embodiment, these contacts S1～SN is made of a switch respectively, utilizes the corresponding resistance R 1～RN that connects of break-make decision of make and break contact whether to cut the usefulness of loop as cut-off current.
Can understand the concrete structure of each preferred embodiment of the utility model by above-mentioned explanation, detailed as described below as for its operation principle:
Light-emitting diode is because of chip itself or the not influence of equal factor of manufacture craft condition, cause different light-emitting diodes that different VF values is arranged, even and the change of the VF value of single light-emitting diode is small, the application mode of light-emitting diode is that collection is most to produce the light of enough brightness at present but as previously mentioned,, at most serial connection composition modules, under the situation that each module is powered under paralleling model again, the VF value takes care of the pence, and the variation that causes total current is a highly significant.Therefore, the utility model utilizes the adjustable design of aforementioned resistance flowing resistance, can determine total current-limiting resistance of incision according to the VF value of the actual measurement of product, and then regulate total current in a fixed range, reaches the purpose of deciding electric current.And the enforcement door of aforementioned techniques is low, and not only cost is low and simple and practical, and efficiently solves the light-emitting diode (LED) module product in the problem of deciding to be met with on the electric current problem.
Claims (5)
1. a light-emitting diode (LED) module adjustable decided current device, is to be serially connected with on the electric power loop of light-emitting diode (LED) module, it is characterized in that, comprising:
Most the resistance that are connected in series mutually;
A most contact are that cross-over connection respectively is in the two ends of each resistance;
Whereby, the break-make of aforementioned contact will determine whether the corresponding resistance that connects cuts the usefulness of loop as current-limiting resistance.
2. light-emitting diode (LED) module adjustable decided current device according to claim 1, it is characterized in that described contact is a normal opened contact.
3. light-emitting diode (LED) module adjustable decided current device according to claim 1, it is characterized in that described contact is made of relative solder joint, connects in the wire jumper mode.
4. light-emitting diode (LED) module adjustable decided current device according to claim 1, it is characterized in that described contact is a normally closed contact.
5. decide current device as light-emitting diode (LED) module as described in the claim 1,2,3 or 4 adjustable, it is characterized in that described contact is to be made of a switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201537071U CN201048461Y (en) | 2007-05-23 | 2007-05-23 | Adjustable constant current device of LED module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201537071U CN201048461Y (en) | 2007-05-23 | 2007-05-23 | Adjustable constant current device of LED module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201048461Y true CN201048461Y (en) | 2008-04-16 |
Family
ID=39301052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201537071U Expired - Fee Related CN201048461Y (en) | 2007-05-23 | 2007-05-23 | Adjustable constant current device of LED module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201048461Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941434A (en) * | 2013-11-15 | 2014-07-23 | 上海中航光电子有限公司 | Backlight source module and static electricity damage detecting method thereof |
-
2007
- 2007-05-23 CN CNU2007201537071U patent/CN201048461Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941434A (en) * | 2013-11-15 | 2014-07-23 | 上海中航光电子有限公司 | Backlight source module and static electricity damage detecting method thereof |
| CN103941434B (en) * | 2013-11-15 | 2017-09-05 | 上海中航光电子有限公司 | Backlight module and its electrostatic damage detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20150523 |
|
| EXPY | Termination of patent right or utility model |