CN203630322U - An ageing testing apparatus detecting the stability of LED power supply driving performance - Google Patents
An ageing testing apparatus detecting the stability of LED power supply driving performance Download PDFInfo
- Publication number
- CN203630322U CN203630322U CN201320884866.4U CN201320884866U CN203630322U CN 203630322 U CN203630322 U CN 203630322U CN 201320884866 U CN201320884866 U CN 201320884866U CN 203630322 U CN203630322 U CN 203630322U
- Authority
- CN
- China
- Prior art keywords
- power
- led
- voltage
- power switch
- ageing tester
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Led Devices (AREA)
Abstract
The utility model discloses an ageing testing apparatus detecting the stability of LED power supply driving performance. The ageing testing apparatus detecting the stability of the LED power supply driving performance comprises a voltage clamp circuit, a power switch tube driving and protection circuit, a power switch device, an LED module group equivalent load and a working state indication circuit. The voltage clamp circuit is formed through the connection of one or more than one voltage-regulator tube and one resistor, and an A1 is enabled to obtain a voltage and a current conducted by a Q1 switch tube. The voltage and the current go through the power switch tube driving and protection circuit. A GS interelectrode and interlayer capacitor of the power switch device is firstly charged. In the charging time, a voltage of an LED drive of primary side feedback in the power-on starting is raised to be a voltage which can allow the LED drive to work normally. The voltage at the position of the A1 is enabled to reach a conduction voltage of the Q1 switch device, so that a function needed by a process from the time that the LED module group is just connected with the LED drive power supply to the time that the current reaches a stabilized output after power on is simulated.
Description
Technical field
The utility model belongs to LED power drives aging of product technical field, is specifically related to a kind of ageing tester of the LED of detection power drives stability.
Background technology
The development at present of LED industry rapidly, its application is large to building intelligent LED illuminator, little of LED electric torch, pilot lamp etc., LED product enters into each corner of society gradually, but the failure mechanism of LED product is the factor that puzzlement LED product quality improves always.In the links such as design, manufacture, installation, application, the integrity problem of LED is a difficult problem for puzzlement industry always.In application scenarios such as illumination, display devices, LED matrix is often made up of plurality of LEDs, its electric performance stablity, Photochromic Properties decay consistance and requirement in serviceable life are all very high, and after long-term energising work, the characteristics such as colour temperature, colour rendering, excitation, spectral distribution, light-emitting uniformity and the illumination of each single LEDs all will change with service time.In addition, the installation initial stage is used normal LED, and bad phenomenon such as after some time of energising work, there will be certain half-light, flash, fault, interruption are bright, is used to promote to product and bring huge negative effect.Thereby, for rejecting in time, quickly and efficiently the product that has defect hidden danger, except needs guarantee that good production technology and correct use operate, also need to be by early stage test screening before finished product application, durability analysis, this is the important guarantee of LED product reliability.
Aging testing system is LED aging test, the important component part of the test such as life test analysis, so-called aging test, it is the assessment to light fixture overall performance stability, mainly comprise electrically, optics, the aspects such as heat radiation detect, general detection need to define cycle detection time, general aging 8 hours, if new product need to be formulated detection time, as 300 hours, 500 hours, 1000 hours, 3000 hours, within 6000 hours, test according to different time respectively, judge the stability of properties of product according to test result, and whether meet standard according to relevant standard product design.
Traditional aging power drives is voltage, electric current, the power with output of products, calculates an equivalent ohmic load (claiming again fictitious load).At present LED power supply production company major part is simulated LED module and does the aging test of power supply product with fictitious load, drive for LED with this aging techniques, must first LED be driven to connection AC power when aging after, connect again cement resistor, LED drives because major part is constant current mode of operation, what in the time of zero load, output voltage had is just higher, can exceed safe voltage scope, so just have potential safety hazard, in the time of batch operation, burn-in test personnel misoperation will be in peril of one's life.If purchase electronics aged load is on the market expensive, the high volume of cost is large.Because common power supply is to be operated in constant voltage mode, can start by normal boot-strap.The mode of operation that LED drives is constant current mode, drives the moment of startup work at LED, and during only with a resistance fictitious load, the voltage of LED driver output can not meet LED and drives the start-up mode from starting shooting to turn to normal constant current mode of operation.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, solve LED and drive the aging problem that can not start with fictitious load, and design a kind of safe and effective, for detection of the ageing tester of LED driving power stability.
For realizing the technical scheme that the utility model object adopts be: a kind of ageing tester of the LED of detection power drives stability, comprises voltage clamp circuit, power switch driving and holding circuit, device for power switching and LED module equivalent load; Described voltage clamp circuit is for being connected with the output loop of LED power drives, and voltage clamp circuit is connected to form successively by some stabilivolts and the first resistance; Described device for power switching is power switch pipe, and power switch pipe is connected with LED module equivalent load; One contact is set between the first resistance and stabilivolt, and this contact provides the voltage and current of admittance for power switch pipe.This voltage and current drives by power switch and holding circuit is charged to the layer capacitance between G, the S utmost point of power switch pipe; voltage when the LED power drives that makes to have former limit feedback within the duration of charging of this layer capacitance starts from switching on power rises to the voltage of the normal work of LED power drives, and now between the first resistance and stabilivolt, the voltage at contact place reaches power switch pipe conducting required voltage.
Preferably, described LED module equivalent load is cement resistor.
Preferably, the rated power of described cement resistor is at least 1 times of LED power drives output power.
Preferably, the rated power of described cement resistor is at least 2 times of LED power drives output power.
Preferably, the rated power of described cement resistor is at least 3 times of LED power drives output power.
Preferably, the rated power of described cement resistor is at least 4 times of LED power drives output power.
Preferably, described power switch and holding circuit comprise diode and second resistance of unidirectional admittance.
Preferably, also comprise the working state indicating circuit being connected in parallel with LED module equivalent load, working state indicating circuit comprises the LED light and the 3rd resistance that connect successively.
Beneficial effect: adopt the ageing tester of utility model, cost is low, easy to operate.Can be directly aging after LED driving connects ageing tester of the present utility model when aging, do not need LED to drive first zero load to go again to connect load, can solve above security hidden trouble.
Accompanying drawing explanation
Fig. 1 is the circuit structure frame principle of the utility model aging testing system
Fig. 2 is the circuit connection structure schematic diagram of the utility model aging testing system
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1 to Figure 2; a kind of ageing tester for detection of the aging power drives stability of LED of the present embodiment, includes voltage clamp circuit, power switch tube drives and holding circuit, power switch pipe, LED module equivalent load, working state indicating circuit.
Described voltage clamp circuit is by single or multiple stabilivolt (ZD1, ZD2, ZDn) and the first resistance R 1 is connected in series, its two ends are connected on respectively the output loop two ends of the aging power drives of LED, one contact A1 is set between the first resistance and stabilivolt, make contact A1 can obtain the voltage and current of power switch pipe switching tube Q1 conducting, this voltage and current is by power switch tube drives and holding circuit, first give the G of power switch pipe, the charging of S interpolar layer capacitance, voltage when this duration of charging can allow the LED driving of former limit feedback start from switching on power rises to LED and drives the voltage that can normally work, at this moment make the voltage at contact A1 place can reach the forward voltage of Q1 switching device.
The present embodiment has been simulated LED module rigidly connecting logical LED driving power, reaches the needed function of stable this process of output to the after-current that powers on.
LED module equivalent load is an equivalent resistance Rs of a LED light source module, is cement resistor, and the power that can bear is that LED output power of power supply is more than 2 times.
Power switch and holding circuit comprise diode D1 and second resistance R 2 of a unidirectional admittance.
Working state indicating circuit is made up of the 3rd resistance R 3 and a LED lamp pearl LED1, luminous in the time that circuit is connected normal work.
When having used after the utility model technology, LED driver output is connected with LED+, the LED-utmost point.Rear end connects after corresponding LED module equivalent load.Connect LED and drive connection line, LED drives just can realize normal aging test.
Adopting after such scheme, in production, LED drives in aging process, not possessing band at driver carries while starting from constant voltage mode (CC) load, solve the problem that connects again load after aging needs zero load is stablized, can cold machine startup work thereby LED is driven, solve production safety hidden danger.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change and revise above-mentioned embodiment.Therefore, the utility model is not limited to embodiment disclosed and described above, also should fall in the protection domain of claim of the present utility model modifications and changes more of the present utility model.In addition,, although used some specific terms in this instructions, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (8)
1. an ageing tester that detects LED power drives stability, is characterized in that, comprises voltage clamp circuit, power switch driving and holding circuit, device for power switching and LED module equivalent load; Described voltage clamp circuit is for being connected with the output loop of LED power drives, and voltage clamp circuit is connected to form successively by some stabilivolts and the first resistance; Described device for power switching is power switch pipe, and power switch pipe is connected with LED module equivalent load; One contact is set between the first resistance and stabilivolt, and this contact provides admittance required voltage and current for power switch pipe.
2. ageing tester according to claim 1, is characterized in that, described LED module equivalent load is cement resistor.
3. ageing tester according to claim 2, is characterized in that, the rated power of described cement resistor is at least 1 times of LED power drives output power.
4. ageing tester according to claim 2, is characterized in that, the rated power of described cement resistor is at least 2 times of LED power drives output power.
5. ageing tester according to claim 2, is characterized in that, the rated power of described cement resistor is at least 3 times of LED power drives output power.
6. ageing tester according to claim 2, is characterized in that, the rated power of described cement resistor is at least 4 times of LED power drives output power.
7. ageing tester according to claim 1, is characterized in that, described power switch and holding circuit comprise diode and second resistance of unidirectional admittance.
8. ageing tester according to claim 1, is characterized in that, also comprises the working state indicating circuit being connected in parallel with LED module equivalent load, and working state indicating circuit comprises the LED light and the 3rd resistance that connect successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320884866.4U CN203630322U (en) | 2013-12-30 | 2013-12-30 | An ageing testing apparatus detecting the stability of LED power supply driving performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320884866.4U CN203630322U (en) | 2013-12-30 | 2013-12-30 | An ageing testing apparatus detecting the stability of LED power supply driving performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203630322U true CN203630322U (en) | 2014-06-04 |
Family
ID=50816784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320884866.4U Expired - Fee Related CN203630322U (en) | 2013-12-30 | 2013-12-30 | An ageing testing apparatus detecting the stability of LED power supply driving performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203630322U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144799A (en) * | 2017-04-26 | 2017-09-08 | 贵州省广播电视信息网络股份有限公司 | A kind of method of forced aging |
-
2013
- 2013-12-30 CN CN201320884866.4U patent/CN203630322U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144799A (en) * | 2017-04-26 | 2017-09-08 | 贵州省广播电视信息网络股份有限公司 | A kind of method of forced aging |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204086505U (en) | A kind of LED lamp intelligence aging testing system | |
| CN105425144A (en) | Relay fault detection circuit and fault detection method thereof | |
| CN104076296B (en) | A kind of method of testing and test device of LED signal lamp luminescent screen | |
| CN202548302U (en) | LED power source testing system | |
| CN103698717A (en) | Aging testing device for detecting driving performance stability of LED (light-emitting diode) power supply | |
| CN103648220A (en) | Controller for automatically detecting maximum working current of light source and detection method thereof | |
| CN203630322U (en) | An ageing testing apparatus detecting the stability of LED power supply driving performance | |
| CN203224610U (en) | Motormeter light automatic tester | |
| CN102170733A (en) | Large power LED numerically controlled lighting method | |
| CN203299358U (en) | Aging test device of LED street lamp | |
| CN103347352A (en) | LED light source short-circuit detection method and device, LED backlight and liquid crystal display device | |
| CN206609956U (en) | A kind of LED lamp aging equipment | |
| CN103941434A (en) | Backlight source module and static electricity damage detecting method thereof | |
| CN202652665U (en) | Railway signal dedicated point-type LED light source lamp | |
| CN203309759U (en) | Novel street lamp with control device with current monitoring function and temperature monitoring function | |
| CN202048538U (en) | Automatic-switch lighting device | |
| CN204272431U (en) | LED emergency lighting circuit for lamp | |
| CN211090076U (en) | Novel intellectual detection system equipment of L ED lamp plate | |
| CN204789917U (en) | Photovoltaic controller detecting system | |
| CN103344860A (en) | Energy-saving type aging test desk | |
| CN202649442U (en) | Energy saving lamp diode simulation starting aging test stand | |
| CN103474035B (en) | A kind of backlight module for liquid crystal indicator and control method thereof | |
| CN209765005U (en) | flight parameter collector switch quantity testing device | |
| CN203414533U (en) | Automatic temperature control and safety power-off device of aging test platform | |
| CN204287367U (en) | The multi-functional testing device of low-voltage AC/DC |
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: 20140604 Termination date: 20191230 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |