CN102967448B - 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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- CN102967448B CN102967448B CN201210471583.7A CN201210471583A CN102967448B CN 102967448 B CN102967448 B CN 102967448B CN 201210471583 A CN201210471583 A CN 201210471583A CN 102967448 B CN102967448 B CN 102967448B
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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 and get electro-optical device, also comprise gear train and optical fiber, described casing is provided with opening, described gear train and optical fiber are through described opening, described electro-optical device of getting is arranged on described box house, it is outside that described motor is arranged on described casing, described gear train one end is connected with the axle of described motor, the other end is connected with described electro-optical device of getting, described motor is got electro-optical device by described gear train drive and is moved in casing, the first end of described optical fiber is connected with described electro-optical device of getting, and the second end is outside described casing.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 and get electro-optical device, also comprise gear train and optical fiber, described casing is provided with opening, described gear train and optical fiber are through described opening, described electro-optical device of getting is arranged on described box house, it is outside that described motor is arranged on described casing, described gear train one end is connected with the axle of described motor, the other end is connected with described electro-optical device of getting, described motor is driven by described gear train and gets electro-optical device and move in casing, the first end of described optical fiber with described get electro-optical device be connected and the second end outside described casing.
In more excellent scheme, also comprise connecting link, described opening is through hole, described gear train is rotating shaft, described rotating shaft one end is connected with the axle of motor, the first end of the other end and described connecting link is fixed, and gets electro-optical device described in the second end of described connecting link is fixing, gets electro-optical device and circumferentially move in setting described in described motor is driven by described rotating shaft.
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, described opening part is provided with the seal in isolation casing and outside casing.
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, the second end of described optical fiber is connected with described photometer.
In more excellent scheme, also comprise LED shaft collar, described LED shaft collar has multiple LED fixed bit be distributed in circumferentially, the center of circle of described circumference on the straight line residing for described rotating shaft, to get the LED aimed at when electro-optical device rotates on each LED fixed bit described in making.
In more excellent scheme, described in 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) motor drive get electro-optical device setting circumferentially move;
2) when getting electro-optical device and aiming at certain LED, the output signal of record rotary encoder, sets 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 light intensity from getting LED that electro-optical device transmits and sending;
In step 2) in, judge whether get electro-optical device aims 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, it is characterized in that: 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 get electro-optical device to 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 control motor rotates towards LED desired location.
The invention has the beneficial effects as follows: adopt and less get electro-optical device and namely can gather the light of multiple LED sample, make the structure of whole LED performance test case comparatively simple, simultaneously, 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; Especially, when motor gets electro-optical device rotation by rotating shaft and connecting link driving, the sealing property of whole LED performance test case can also be improved; 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.
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, get electro-optical device 13, gear train 16 and optical fiber 14, casing 1 is provided with and is communicated with outside casing and the opening 12 of the inner chamber 19 of casing, gear train 16 and optical fiber 14 are through opening 12, get the inner chamber 19 that electro-optical device 13 is arranged on casing 1, motor 11 is arranged on the outside of casing 1, one end of gear train 16 is connected with the through-drive of motor 11, the other end with get electro-optical device 13 and be connected, motor 11 can drive by driving gear train 16 to be got electro-optical device 13 in the inner chamber 19 of casing 1 and moves, opening 12 place is provided with the seal 18 of the outside of isolation inner chamber 19 and casing, the first end of optical fiber 14 with get electro-optical device 13 and be connected, second end is in the outside of casing 1, be connected with photometer 15.
LED shaft collar 2 is provided with in inner chamber 19, shaft collar 2 is provided with multiple LED fixed bit 21, motor 11 rotates under the control of the controller and drives and gets electro-optical device 13 and move, and gets electro-optical device 13 like this and can aim at each LED fixed bit 21, the light sent with the LED received on LED fixed bit 21.
LED shaft collar can adopt aluminium base, and LED can be welded on corresponding LED fixed bit.
Like this, adopt and less get electro-optical device 13(such as) namely can gather the light of multiple LED sample, make the structure of whole LED performance test case comparatively simple, simultaneously, when the LED shaft collar 2 needing the interval between replacing LED fixed bit 21 different, only need adjustment to get electro-optical device 13 and move 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 11 is placed on the outside of casing 1 simultaneously, 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.
Seal 18 can be arranged on opening 12 one end near inner chamber 19, also can arrange seal 18 at the open at one end near casing 1 outside, and the opening be positioned in the middle of casing 1 wall also can arrange seal 18.
In a kind of more excellent embodiment, LED performance test case also comprises connecting link 17, opening 12 is through holes, gear train 16 is rotating shafts, rotating shaft 16 one end is connected with the axle of motor 11, the first end 171 of the other end and connecting link 17 is fixed, second end 172 of connecting link fixedly gets electro-optical device 13, motor 11 is driven by rotating shaft 16 and gets the circumferentially rotation of electro-optical device 13 in setting, and corresponding on LED shaft collar 2 is circumferentially dispersed with multiple LED sample, get when electro-optical device 13 rotates and can aim at each LED sample (geometric center of getting optical lens of such as getting electro-optical device 13 aims at LED sample).Adopt such scheme, only need the through hole 12 adopting small diameter, namely can drive and get electro-optical device 13 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 get electro-optical device 13 moving linearly, in order to detect more LED sample, then need on casing 1, arrange corresponding longer opening 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 gear train 16 makes seal 18 be difficult to form sealing effectiveness closely with the wall of inner chamber 19, sealed open 12 is very difficult.
In addition, rotating shaft 16 can have the rotating shaft through hole 161 along rotor shaft direction, and optical fiber 14 is through rotating shaft through hole 161, and one end puts in inner chamber 19 and gets electro-optical device 13 and be connected, the other end passes casing 1 and is connected with photometer 15, can avoid the rotation of rotating shaft 16 like this and wound optical fibers 14 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.
Certainly, gear train 16 is not limited to the form of rotating shaft, such as, motor 11 rotarily drive screw mandrel motion, connecting link one end is connected with wire rod thread, and the other end fixedly gets electro-optical device 13, thus get electro-optical device 13 can with connecting link rectilinear motion.
When LED performance test case also will complete LED vibration-testing function, rotating shaft 16 can along rotating shaft axially near or away from LED shaft collar 2, thus drive and get electro-optical device 13 corresponding sports, when vibrating to prevent LED shaft collar 2 with get electro-optical device 13 and collide.
A LED scaling method for embodiment, it adopts rotating shaft 16 as gear train, comprises the steps:
1-1. motor 11 drives gets electro-optical device 13 circumferentially rotating around the center of circle of this circumference in setting: such as, computing machine sends location position instruction to the controller of motor 11, and namely motor 11 starts driving and get electro-optical device 13 and rotate;
Simultaneously, photometer 15 detects the light intensity from getting electro-optical device 13 and sending through the LED that optical fiber 14 transmits to 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 and corresponding output electric signal.
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 gets the position that electro-optical device 13 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 after electro-optical device 13 gathers, and is transferred to photometer 15 through optical fiber 14, and photometer 15 can detect the parameter such as light intensity, spectrum, colourity of this LED.
LED performance test case, lighting system (comprise and get electro-optical device 13, 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 (9)
1. a LED performance test case, comprise casing, motor and get electro-optical device, it is characterized in that: also comprise gear train, connecting link and optical fiber, described casing is provided with opening, described gear train and optical fiber are through described opening, described electro-optical device of getting is arranged on described box house, it is outside that described motor is arranged on described casing, described gear train one end is connected with the axle of described motor, the other end is connected with described electro-optical device of getting, described motor is got electro-optical device by described gear train drive and is moved in casing, the first end of described optical fiber is connected with described electro-optical device of getting, and the second end is outside described casing,
Described opening is through hole, described gear train is rotating shaft, described rotating shaft one end is connected with the axle of motor, the first end of the other end and described connecting link is fixed, get electro-optical device described in second end of described connecting link is fixing, get electro-optical device described in described motor is driven by described rotating shaft and circumferentially move in setting.
2. 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.
3. LED performance test case as claimed in claim 1, is characterized in that: described opening part is provided with the seal in isolation casing and outside casing.
4. LED performance test case as claimed in claim 1, 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. the LED performance test case as described in as arbitrary in Claims 1-4, it is characterized in that: also comprise photometer, the second end of described optical fiber is connected with described photometer.
6. the LED performance test case as described in claim 1,2 or 4, it is characterized in that: also comprise photometer and LED shaft collar, second end of described optical fiber is connected with described photometer, described LED shaft collar has multiple LED fixed bit be distributed in circumferentially, the center of circle of described circumference on the straight line residing for described rotating shaft, to get the LED aimed at when electro-optical device rotates on each LED fixed bit described in making.
7. LED performance test case as claimed in claim 6, is characterized in that: described in get electro-optical device can near or away from described LED shaft collar.
8. a LED scaling method, is characterized in that: adopt LED performance test case as claimed in claim 7, comprise the steps:
1) motor drive get electro-optical device setting circumferentially move;
2) when getting electro-optical device and aiming at certain LED, the output signal of record rotary encoder, sets up the corresponding relation of the position of this output signal and LED.
9. a LED performance test methods, is characterized in that: utilize LED scaling method as claimed in claim 8, comprise the steps:
Controller receives with the control signal of LED set position information, and makes driven by motor get electro-optical device to 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 control motor rotates towards LED desired location.
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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 |
| CN102162767A (en) * | 2010-12-30 | 2011-08-24 | 中国科学院长春光学精密机械与物理研究所 | Spaceborne calibration light source LED (light emitting diode) light emitting performance testing device |
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