CN105142320A - Online detection circuit for detecting fault of serial light-emitting diode light source - Google Patents
Online detection circuit for detecting fault of serial light-emitting diode light source Download PDFInfo
- Publication number
- CN105142320A CN105142320A CN201510574110.3A CN201510574110A CN105142320A CN 105142320 A CN105142320 A CN 105142320A CN 201510574110 A CN201510574110 A CN 201510574110A CN 105142320 A CN105142320 A CN 105142320A
- Authority
- CN
- China
- Prior art keywords
- led
- light source
- detection circuit
- emitting diode
- online detection
- 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.)
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Abstract
The invention provides an online detection circuit for detecting a fault of a serial light-emitting diode light source and belongs to the online detection circuit related in the technical field of light-emitting diode light sources. According to the technical scheme, the online detection circuit comprises a detected LED light source and a detection circuit; a power supply +V of the detected LED light source is connected with one end of a current limiting resistor R, and the other end of the current limiting resistor R is connected with detected serial LEDs (Da-Dn); the detected serial LEDs (Da-Dn) are connected with pins of test connector seats in one-to-one correspondence through lead-out wires which connect each two LEDs, and the test connector seats are connected with connector heads in the detection circuit in one-to-one correspondence; the connector heads are connected with connection cables, the connection cables are connected with branch current limiting resistors (Ra-Rn), and the branch current limiting resistors (Ra-Rn) are connected with serial visible-light light-emitting diodes (Dtesta-Dtestn). The online detection circuit is suitable for online detection when short-current and open-circuit faults happen to various kinds of LED light sources which are connected in series.
Description
Technical field
The invention belongs in semiconductor light-emitting-diode (LED) light sources technical field the on-line checkingi circuit of a kind of series LED light source failure related to.
Background technology
Semiconductor light-emitting-diode, due to the feature such as energy-conservation, long-life, small size, high brightness, is widely used in science and technology and the illumination of industrial circle, signal lamp, display or as special light sources etc.In order to improve luminous intensity, usual light source all adopts multiple LED combination to form.
In order to make, the structure of circuit of light sources is simple, cost is low, is all connected by the multiple LED strip connection in circuit of light sources in a lot of situation.Although this method of attachment is simple, if one of them or several LED break down, LED in whole link in tandem may be caused not work or damage.
The fault mode of LED is divided into short circuit and open circuit form.Short circuit failure mode is presented as the LED short circuit of breaking down and does not work, and other LED is as usual luminous.This pattern just can find the LED broken down very intuitively for visible LED, but for some special light sources, as: infrared LED light source, not by some special devices, cannot the LED that is out of order be seen by human eye.And if when constant voltage is powered, short trouble can strengthen the electric current in series LED, likely damages the LED in whole link.All LED when open circuit failure mode is presented as and breaks down in link do not work, and at this moment do not see it being which or several LED have broken, if the LED quantity particularly used is many, search the LED broken down just more difficult.
When light source goes wrong, in order to not affect production, work, sometimes monoblock or part light source must be changed at once, destroying or depot repair, cause people, material resources waste.And which LED has broken which is just changed to have some equipment and device to wish, online Quick overhaul and replacing.
In order to satisfied series connection LED source fault finds fast and repairs, invent a kind of simple on-line checkingi circuit.
By retrieval, the on-line checkingi circuit of light-emitting diode (LED) light source failure that do not find to connect like associated class.
Summary of the invention
The object of the invention is to: design and set up a kind of on-line checkingi circuit of light source failure that semiconductor light-emitting-diode (LED) is connected, to realize the real-time detection of series LED light source failure.
The technical problem to be solved in the present invention is: the on-line checkingi circuit providing a kind of LED source fault of connecting.
The technical scheme of technical solution problem is as shown in Figure 1: comprising left side in figure is tested LED light source.In figure, right side is testing circuit.Wherein, the tested light source in left side comprises power supply+V1, current-limiting resistance R2, series connection light-emitting diode D3 (D
a, D
b, D
cd
id
n), test connector seat 4.In figure, the testing circuit on right side comprises connector head 5, connection cable 6, branch road current-limiting resistance (R
a~ R
n) 7, visible light emitting diode (D
testa~ D
testn) 8.
Tested light source power supply power supply+V1 is connected with current-limiting resistance R2 one end, the other end of current-limiting resistance R2 and tested series LED (D
a~ D
n) 3 be connected, tested series LED (D
a~ D
n) 3 to be connected one by one with the pin of test connector seat 4 by the lead-out wire that LED is connected between two, test connector seat 4 is connected one to one with the connector head 5 in testing circuit, and connector head 5 is connected with connection cable 6, connection cable 6 and branch road current-limiting resistance (R
a~ R
n) 7 to connect one by one, branch road current-limiting resistance (R
a~ R
n) 7 with the visible light emitting diode (D that connects
testa~ D
testn) 8 to be connected one by one.
Operation principle illustrates: as shown in Figure 1.During normal work, all LED normal luminous.
When there is short circuit failure mode in light source, then the LED short circuit of breaking down and the not luminous, (as: D in Fig. 1
i), be now connected with test circuit by connector holder 4, connector head 5, can find out in test circuit with the D that damages in light source
icorresponding visible ray diode (D
testi) do not work, and other D
testa, D
testbd
testnthen as usual luminous; In like manner, (the D in Fig. 1 when open circuit failure mode road appears in light source
j), then corresponding test LED (D
testj) because the LED unlike other is by the LED (D be detected
a, D
bd
n) shunting, be therefore easy to find out the test LED (D of its brightness than other
testa, D
testbd
testn) high.As can be seen here, by observing LED ((D in testing circuit
testa, D
testbd
testn) light on and off and highlightedly can find out which LED (D in tested light source
a, D
bd
n) break down.
Good effect of the present invention:
Be applicable to on-line checkingi when short circuit, open fault appear in the various LED light source connected with cascade.Saving of labor, cost are low, convenient, fast.
Accompanying drawing explanation
Fig. 1 is the structural representation of the on-line checkingi circuit of a kind of LED source fault of connecting of the present invention.
Specific implementation method
The present invention presses structure shown in Fig. 1 and implements, wherein: the constant-current source that the power supply+V1 of the tested light source in left side designs according to different LED light source requirements or source of stable pressure;
Current-limiting resistance R2, branch road current-limiting resistance (R
a~ R
n) 7 select resistance and power according to power consumption requirements in circuit;
Tested semiconductor light-emitting-diode LED (D
a~ D
n) 3 light source luminescent requirements used, select the light-emitting diodes such as visible or infrared or laser;
Connector holder 4, connector head 5 can select the pair of connectors of bore and scalp acupuncture form as requested;
Connection cable 6 is Universal automatic cable;
Light-emitting diode (D in test circuit
testa~ D
testn) the general visible light emitting diode of 8 selection.
Claims (1)
1. an on-line checkingi circuit for LED source of connecting fault, is characterized in that comprising tested LED source and testing circuit; Wherein, tested light source comprises power supply+V (1), current-limiting resistance R (2), series connection light-emitting diode D (3) (D
a, D
b, D
cd
id
n), test connector seat (4); Testing circuit comprises connector head (5), connection cable (6), branch road current-limiting resistance (R
a~ R
n) (7), visible light emitting diode (D
testa~ D
testn) (8); Tested light source power supply power supply+V (1) is connected with current-limiting resistance R (2) one end, the other end of current-limiting resistance R (2) and tested series LED (D
a~ D
n) (3) be connected, tested series LED (D
a~ D
n) (3) lead-out wire of being connected by LED is between two connected one by one with the pin of test connector seat (4), test connector seat (4) is connected one to one with the connector head (5) in testing circuit, connector head (5) is connected with connection cable (6), connection cable (6) and branch road current-limiting resistance (R
a~ R
n) (7) connect one by one, branch road current-limiting resistance (R
a~ R
n) (7) and the visible light emitting diode (D that connects
testa~ D
testn) (8) be connected one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510574110.3A CN105142320A (en) | 2015-09-10 | 2015-09-10 | Online detection circuit for detecting fault of serial light-emitting diode light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510574110.3A CN105142320A (en) | 2015-09-10 | 2015-09-10 | Online detection circuit for detecting fault of serial light-emitting diode light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105142320A true CN105142320A (en) | 2015-12-09 |
Family
ID=54727480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510574110.3A Pending CN105142320A (en) | 2015-09-10 | 2015-09-10 | Online detection circuit for detecting fault of serial light-emitting diode light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105142320A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2592173A1 (en) * | 1985-12-20 | 1987-06-26 | Gueriaux Pierre | Method for identifying a defective electrical load in a series circuit, particularly in a lighting system, together with the defective series circuit, and device for implementing the method |
| US20050168156A1 (en) * | 2004-01-30 | 2005-08-04 | 1 Energy Solutions, Inc. | LED light module and lighting string |
| CN201185155Y (en) * | 2008-04-25 | 2009-01-21 | 艾礼富电子(深圳)有限公司 | Magnetic spring switch |
-
2015
- 2015-09-10 CN CN201510574110.3A patent/CN105142320A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2592173A1 (en) * | 1985-12-20 | 1987-06-26 | Gueriaux Pierre | Method for identifying a defective electrical load in a series circuit, particularly in a lighting system, together with the defective series circuit, and device for implementing the method |
| US20050168156A1 (en) * | 2004-01-30 | 2005-08-04 | 1 Energy Solutions, Inc. | LED light module and lighting string |
| CN201185155Y (en) * | 2008-04-25 | 2009-01-21 | 艾礼富电子(深圳)有限公司 | Magnetic spring switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151209 |