CN102967447B - A kind of LED performance test case, scaling method and performance test methods - Google Patents
A kind of LED performance test case, scaling method and performance test methods Download PDFInfo
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- CN102967447B CN102967447B CN201210471511.2A CN201210471511A CN102967447B CN 102967447 B CN102967447 B CN 102967447B CN 201210471511 A CN201210471511 A CN 201210471511A CN 102967447 B CN102967447 B CN 102967447B
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Abstract
The invention discloses a kind of LED performance test case, scaling method and performance test methods, test box comprises casing, motor, first gets electro-optical device and second gets electro-optical device, also comprise rotating shaft, optical fiber and web member, casing is provided with through hole, rotating shaft and optical fiber are through through hole, first gets electro-optical device and second gets electro-optical device and is arranged on box house, motor is arranged on casing outside, driven by motor rotating shaft rotates, first gets electro-optical device and second gets electro-optical device and is fixed in rotating shaft by web member, driven by motor first is got electro-optical device and second and is got electro-optical device respectively in respective circumferentially motion, first gets electro-optical device and second is got electro-optical device and is sent to outside casing by the light collected by optical fiber.LED performance test box structure of the present invention is simple, easy and simple to handle, can on-line checkingi LED performance parameter.
Description
Technical field
The present invention relates to LED field tests, be specifically related to a kind of LED performance test case, scaling method and performance test methods.
Background technology
At present current LED reliability test method is: same model, with batch LED product in, the sample extracting some is tested, before the test and in process of the test, measure its performance parameter, the LED life-span of this model, this batch is extrapolated according to corresponding life algorithm.Because the theoretical life-span of LED reaches tens thousand of hours, therefore need to adopt the strenuous test method strengthening stress to accelerate whole process of the test.
In order to raise the efficiency and Optimum Experiment result, simultaneously common practice carries out fail-test to multiple LED sample.A usual sampling pallet in existing LED reliability test system, this pallet is fixed multiple LED sample, again whole pallet is placed in strenuous test case, in process of the test when needing the performance parameter measuring LED sample, just the LED sample on pallet is pulled down successively, be positioned in integrating sphere one by one and measure, again LED sample is reinstalled on pallet after measurement, put back in strenuous test case and continue follow-up test.Its Problems existing is:
1, in whole process of the test, need repeatedly to install, dismantle LED sample, add a large amount of manpowers and time cost;
2 and in installation, exist in unloading process and cause the labile factor of test specimen performance change and affect final testing result.
Summary of the invention
In order to solve prior art problem, the invention provides a kind of structure simple and the LED test box of dependable performance, scaling method and performance test methods.
A kind of LED performance test case, comprise casing, motor, first gets electro-optical device and second gets electro-optical device, also comprise rotating shaft, optical fiber and web member, described casing is provided with through hole, described rotating shaft and optical fiber are through described through hole, described first gets electro-optical device and second gets electro-optical device and is arranged on described box house, it is outside that described motor is arranged on described casing, rotating shaft described in described driven by motor rotates, described first gets electro-optical device and second gets electro-optical device and is fixed in described rotating shaft by described web member, described in described driven by motor, first gets electro-optical device and second and gets electro-optical device respectively in respective circumferentially motion, described first gets electro-optical device and second is got electro-optical device and is sent to outside casing by the light collected by optical fiber.
In more excellent scheme, also comprise optical branching device, described optical branching device is arranged in described casing or outside casing, and described first gets the optical fiber that electro-optical device and second gets electro-optical device is converged by described optical branching device.
In more excellent scheme, described through hole is provided with the seal in isolation casing and outside casing.
In more excellent scheme, described rotating shaft has axial rotating shaft through hole, and described optical fiber is through described rotating shaft through hole.
In more excellent scheme, also comprise the rotary encoder for feeding back described electric machine rotation angle and the controller for controlling the rotation of described motor, the output signal end of described rotary encoder is electrically connected with described controller.
In more excellent scheme, also comprise photometer, described photometer receives the light converged through described optical branching device by optical fiber.
In more excellent scheme, also comprise LED shaft collar, described LED shaft collar comprises the first concentric circumference and the second circumference that are distributed with LED fixed bit, the center of circle of described first circumference and the second circumference is on the straight line residing for described rotating shaft, described motor drives described first to get electro-optical device and second and gets the LED that electro-optical device aims at the first circumference and second LED fixed bit circumferentially respectively, and described web member is when certain position, described first get electro-optical device and second get in electro-optical device only have at the most one aim at LED.
In more excellent scheme, described first get electro-optical device and second get electro-optical device can near or away from described LED shaft collar.
Present invention also offers a kind of LED scaling method, the LED performance test case described in employing, comprises the steps:
1) described motor drives first to get electro-optical device and second to get electro-optical device and circumferentially move at described first circumference and second respectively;
2) when first get electro-optical device or second get electro-optical device aim at certain LED time, record rotary encoder output signal, set up the corresponding relation of the position of this output signal and LED.
In more excellent scheme,
In step 1), also comprise photometer and detect and get electro-optical device or second from first and get the light intensity that LED that electro-optical device transmits sends;
In step 2) in, judge that first gets electro-optical device or second and get electro-optical device and whether aim at certain LED as follows: whether the light intensity that photometer detects occurs peak value; Output signal is the output signal at the rotary encoder in light intensity peak moment.
Present invention also offers a kind of LED performance test methods, the LED scaling method described in utilization, comprises the steps:
Controller receives with the control signal of LED set position information, and makes driven by motor first get electro-optical device or second to get electro-optical device and rotate to corresponding position;
Controller receives the output signal of rotary encoder, if the LED physical location of this output signal correspondence is inconsistent with LED desired location, then first gets electro-optical device or second and gets electro-optical device and rotate towards LED desired location described in control driven by motor.
The invention has the beneficial effects as follows: when the LED shaft collar needing the interval between replacing LED fixed bit different, adjustment is only needed to get electro-optical device motion and aim at corresponding LED sample, and do not need other too much operations, thus operate comparatively simple, good to multiple LED shaft collar applicability, motor can be avoided to break down under the extreme test environment of inner chamber, reduce mission life; Motor is driven by rotating shaft and web member and gets electro-optical device rotation, improves the sealing property of whole LED performance test case; Simultaneously can to multiple LED properties of sample parameter timesharing on-line checkingi, without the need to repeatedly installing, dismantling LED test specimen in testing process, and do not interrupt the whole stress conditions putting on LED test specimen, thus avoid the test error that changes because repeatedly installing, dismantling LED test specimen and stress condition and introduce.
Accompanying drawing explanation
Fig. 1 is the partial schematic sectional view of the LED performance test case of an embodiment of the present invention;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the schematic perspective view of the LED shaft collar of Fig. 1;
Fig. 4 be a kind of embodiment comprise the fragmentary bottom schematic diagram that first and second gets electro-optical device, web member and rotating shaft.
Embodiment
Below with reference to accompanying drawing, specific embodiments of the invention are described further.
As illustrated in fig. 1 and 2, a kind of LED performance test case of embodiment, comprise casing 1, motor 11, first gets electro-optical device 13, second gets electro-optical device 131, rotating shaft 16, web member 17, casing 1 is provided with and is communicated with outside casing and the through hole 12 of the inner chamber 19 of casing, rotating shaft 16 is through through hole 12, first gets electro-optical device 13 and second gets the inner chamber 19 that electro-optical device 131 is arranged on casing 1, motor 11 is arranged on the outside of casing 1, motor 11 can drive shaft 16 rotate, stretch into one end fixed connecting piece 17 of the rotating shaft 16 of inner chamber 19, web member 17 is fixed first to get electro-optical device 13 and second and get electro-optical device 131, motor 11 can drive first to get electro-optical device 13 and second and get electro-optical device 131 and circumferentially move at the first circumference and second respectively, first gets electro-optical device 13 and second gets electro-optical device 131 and will collect light is sent to outside casing 1 by optical fiber, optical branching device 143 can be utilized, the first optical fiber 142 connection first being got electro-optical device 13 be connected after the second the second optical fiber 141 getting electro-optical device 131 converges, be connected with photometer 15 by optical fiber 14, wherein, optical branching device 143 can in casing 1, and it can avoid the impact of the test environment be subject in casing when casing 1 is outer, like this in these optical fiber, or optical fiber 14, or the first optical fiber 142 and the second optical fiber 141 are simultaneously through through hole 12.
As shown in Figure 3, be provided with in inner chamber 19 on LED shaft collar 2, LED shaft collar 2 and comprise the first concentric circumference 21 and the second circumference 22, and both centers of circle are on the straight line residing for rotating shaft 16, two are circumferentially distributed with LED fixed bit.In one embodiment, LED fixed bit on first circumference 21 and the second circumference 22 is all in (relative to the center of circle) in different angles, such as, LED fixed bit 222 on second circumference 22 is between LED fixed bit 211 on the first circumference 21 and LED fixed bit 212, LED fixed bit 211 on first circumference 21 is between LED fixed bit 222 on the second circumference 22 and LED fixed bit 221, in this case, on web member 17 first get electro-optical device 13 and second get electro-optical device 131 can be identical relative to the angle of rotating shaft 16, to ensure when web member 17 is in certain position, one of them can only be had at most to get electro-optical device and to aim at the geometric center aligning LED sample getting optical lens that LED(such as gets electro-optical device 13).In another embodiment, as shown in Figure 4, when first get electro-optical device 13 and second get electro-optical device 131 different relative to the angle of rotating shaft 16 time, and LED, the LED of the second circumference 22 relevant position on the first circumference 21 and the center of circle of circumference are when being on same straight line, can ensure that synchronization can only have at most one of them to get electro-optical device and aim at LED equally.Get electro-optical device and can have more than 2, correspondingly, the circumference being distributed with LED fixed bit on LED shaft collar 2 also will have corresponding number, and ensures, when web member 17 is in certain position, these are got in electro-optical device has one to aim at certain LED at the most.
LED shaft collar 2 can adopt aluminium base, and LED can be welded on corresponding LED fixed bit.
Like this, motor 11 is placed on the outside of casing 1, motor 11 (high temperature, low temperature, high humidity etc.) under the extreme test environment of inner chamber 19 can be avoided to break down, reduce mission life.
Through hole 12 place is provided with the seal 18 of the outside of isolation inner chamber 19 and casing, seal 18 can be arranged on through hole 12 one end near inner chamber 19, also can arrange seal 18 in the through hole one end near casing 1 outside, the through hole position be positioned in the middle of casing 1 wall also can arrange seal 18.
Only need the through hole 12 adopting small diameter, namely first can be driven to get electro-optical device 13 and second get electro-optical device 131 and rotate on a large scale, to gather the light of multiple LED sample, thus less seal 18 can be adopted to realize the inner chamber 19 of casing 1 and outside isolation, otherwise, if adopt the motor 11 be arranged on outside casing 1 to drive first to get electro-optical device 13 and second get electro-optical device 131 moving linearly, in order to detect more LED sample, then need on casing 1, arrange corresponding longer through hole 12, because the inner chamber 19 of LED performance test case can adopt high temperature usually, low temperature, the test environment of high humidity, the movement of rotating shaft 16 makes seal 18 be difficult to form sealing effectiveness closely with the wall of inner chamber 19, sealing through hole 12 is very difficult.
In addition, rotating shaft 16 can have the rotating shaft through hole 161 along rotor shaft direction, optical fiber 14(or the first optical fiber 142 and the second optical fiber 141) through rotating shaft through hole 161, the rotation of rotating shaft 16 can be avoided like this and wound optical fibers 14(or the first optical fiber 142 and the second optical fiber 141) as far as possible.
LED performance test case can also comprise the rotary encoder 111 for feeding back motor 11 rotational angle, with the controller for controlling motor 11 rotation, the axle of motor 11 turns to different angles, the output signal end of rotary encoder 111 exports corresponding electric signal, the output signal end of rotary encoder 111 is electrically connected with controller, controller receives the instruction of the rotation set angle of the computing machine be connected with controller, or rotate set angle according to the setting of controller internal processes, the output electric signal of rotary encoder 111 is received with Time Controller, controller judges whether this output electric signal (the actual anglec of rotation of a corresponding motor 11) is corresponding with set angle, if not corresponding, then controller controls motor 11 further and rotates towards the position of set angle, thus the FEEDBACK CONTROL achieved motor 11, improve the running accuracy of motor 11.
When LED performance test case also will complete LED vibration-testing function, rotating shaft 16 can along the axially close of rotating shaft or away from LED shaft collar 2, thus drive first to get electro-optical device 13 and second and get electro-optical device 131 corresponding sports, when vibrating to prevent LED shaft collar 2 and two get electro-optical device and collide.
A LED scaling method for embodiment, comprises the steps:
1-1. motor 11 drives first to get electro-optical device 13 to rotate around the center of circle of this circumference on the first circumference 21 of setting, drive second to get the center of circle of electro-optical device 131 around this circumference on the second circumference 22 to rotate: such as, computing machine sends location position instruction to the controller of motor 11, and namely motor 11 starts to drive two to get electro-optical device and rotate;
Simultaneously, photometer 15 detects to be got electro-optical device 13 or the second from first and gets the light intensity that electro-optical device 131 sends through the LED that optical fiber 14 transmits 1-2.;
If 1-3. is within certain time period, the light intensity that photometer 15 detects reaches a peak value, namely light intensity starts after increasing gradually to reduce, namely what this maximum light intensity was corresponding is a peak value, now, the computing machine (or photometer 15) connected from photometer 15 reads and records the output signal (the corresponding different rotational angle of different output signals) of rotary encoder 111, and set up the position of this LED and the corresponding relation of this output signal, can accurately aim at corresponding LED like this, certainly, also can photometer 15 once light intensity be detected, namely be considered as targeted by certain LED.
1-4. drive motor 11 rotates a circle, and namely completes the demarcation to all LED, establishes the corresponding relation of each LED position output electric signal corresponding to rotary encoder 111.
When needing to change other LED shaft collar 2, even if the interval between LED fixed bit is not identical, after above-mentioned demarcating steps, also the output signal corresponding relation of each LED position and rotary encoder 111 can be set up easily, what employing was fixing compared to existing technology gets electro-optical device, structure is simpler, operates easier.
A LED performance test methods for embodiment, comprises the steps:
2-1. is when needing the LED detecting assigned address, computing machine sends with the control signal of assigned address (desired location) to controller that (user manually can input the coordinate figure of LED sample, computing machine can be converted to the encoded radio of corresponding rotary encoder according to coordinate figure), after controller receives this control signal, drived control motor 11 drives first to get electro-optical device 13 or the second and gets the position that electro-optical device 131 rotates to correspondence;
2-2. controller receives the output signal of rotary encoder 111, if the LED physical location of this output signal correspondence is inconsistent with LED assigned address, then controls motor 11 towards the rotation of LED assigned address, until LED physical location is consistent with LED assigned address;
The light that the LED that 2-3. is corresponding sends is got electro-optical device 13 or the second by first and is got after electro-optical device 131 gathers, and be transferred to photometer 15 through optical fiber 14, photometer 15 can detect the parameter such as light intensity, spectrum, colourity of this LED.
LED performance test case, lighting system (comprise first get electro-optical device 13, second get electro-optical device 131, optical fiber 14) and photometer 15 all can be controlled by computing machine automatic synchronization, automatically the environmental parameter in test period, LED performance test case, the case temperature of LED test specimen, electric current, voltage, electric power, the parameter such as relative optical power or light intensity, spectrum, colourity is recorded by computing machine follow procedure set model, according to the attenuation of test specimen performance parameter, calculate the estimated performance of test specimen by related algorithm.
Claims (7)
1. a LED performance test case, comprise casing, motor, first gets electro-optical device and second gets electro-optical device, it is characterized in that: also comprise rotating shaft, optical fiber, photometer, LED shaft collar, optical branching device and web member, described casing is provided with through hole, described rotating shaft and optical fiber are through described through hole, described first gets electro-optical device and second gets electro-optical device and is arranged on described box house, it is outside that described motor is arranged on described casing, rotating shaft described in described driven by motor rotates, described first gets electro-optical device and second gets electro-optical device and is fixed in described rotating shaft by described web member, described in described driven by motor, first gets electro-optical device and second and gets electro-optical device respectively in respective circumferentially motion, described first gets electro-optical device and second gets electro-optical device and is sent to outside casing by optical fiber by the light collected, described optical branching device is arranged in described casing or outside casing, and described first gets the optical fiber that electro-optical device and second gets electro-optical device is converged by described optical branching device, and described photometer receives the light converged through described optical branching device by optical fiber, described LED shaft collar comprises the first concentric circumference and the second circumference that are distributed with LED fixed bit, the center of circle of described first circumference and the second circumference is on the straight line residing for described rotating shaft, described motor drives described first to get electro-optical device and second and gets the LED that electro-optical device aims at the first circumference and second LED fixed bit circumferentially respectively, and described web member is when certain position, described first get electro-optical device and second get in electro-optical device only have at the most one aim at LED.
2. LED performance test case as claimed in claim 1, is characterized in that: described through hole is provided with the seal in isolation casing and outside casing.
3. LED performance test case as claimed in claim 1, is characterized in that: described rotating shaft has axial rotating shaft through hole, and described optical fiber is through described rotating shaft through hole.
4. the LED performance test case as described in as arbitrary in claims 1 to 3, it is characterized in that: also comprise the rotary encoder for feeding back described electric machine rotation angle and the controller for controlling the rotation of described motor, the output signal end of described rotary encoder is electrically connected with described controller.
5. LED performance test case as claimed in claim 1, is characterized in that: described first get electro-optical device and second get electro-optical device can near or away from described LED shaft collar.
6. a LED scaling method, is characterized in that: adopt LED performance test case as claimed in claim 1, comprise the steps:
1) described motor drives first to get electro-optical device and second to get electro-optical device and circumferentially move at described first circumference and second respectively;
2) when first get electro-optical device or second get electro-optical device aim at certain LED time, record rotary encoder output signal, set up the corresponding relation of the position of this output signal and LED.
7. a LED performance test methods, is characterized in that: utilize LED scaling method as claimed in claim 6, comprise the steps:
Controller receives with the control signal of LED set position information, and makes driven by motor first get electro-optical device or second to get electro-optical device and rotate to corresponding position;
Controller receives the output signal of rotary encoder, if the LED physical location of this output signal correspondence is inconsistent with LED desired location, then first gets electro-optical device or second and gets electro-optical device and rotate towards LED desired location described in control driven by motor.
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| CN104569778A (en) * | 2014-12-20 | 2015-04-29 | 佛山市多谱光电科技有限公司 | LED integrated ageing and life rapid detection device |
| CN106291304B (en) * | 2016-07-29 | 2019-04-05 | 深圳清华大学研究院 | A kind of LED test device and test method |
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| TWI236530B (en) * | 2004-07-29 | 2005-07-21 | Chroma Ate Inc | Automatic optical characteristics testing apparatus and method for light emitting device |
| JP5525477B2 (en) * | 2011-03-31 | 2014-06-18 | シャープ株式会社 | Sample inspection equipment |
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| CN102486520A (en) * | 2010-12-04 | 2012-06-06 | 展晶科技(深圳)有限公司 | Light emitting diode (LED) light source test device |
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