CN110793909A - Method for accelerating resin crack test by LED - Google Patents
Method for accelerating resin crack test by LED Download PDFInfo
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- CN110793909A CN110793909A CN201910984182.3A CN201910984182A CN110793909A CN 110793909 A CN110793909 A CN 110793909A CN 201910984182 A CN201910984182 A CN 201910984182A CN 110793909 A CN110793909 A CN 110793909A
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Abstract
The invention discloses a method for accelerating a resin crack test of an LED, which comprises the following specific operation steps: preliminarily measuring the LED lamp strip, adjusting the current of 1 LED lamp strip to a comparison temperature Tr of 125 ℃ when the ambient temperature Ta is 25 ℃, wherein the current is 950mA when the comparison temperature Tr is 125 ℃, and the current is 950mA when the ambient temperature Ta is 25 ℃; 1 piece of LED lamp strip of test in the laboratory, the experimental condition is: the environment temperature Ta is 80 ℃, the feedback current If is 950mA, the circuit is turned on for 1h and then turned off for 15min, and the operation is circulated; observing the condition of the LED light bar on an observation mechanism every day, and recording the observation result; the method for accelerating the reliability of the resin crack test through the LED is faster, more accurately locks the LED defects, saves time and cost, can detect the time when the LED resin cracks, and avoids the functional defects after long-time use, thereby achieving the prevention purpose by adopting measures of reducing LED current, changing optical sheets, radiating mechanisms, changing designs and the like.
Description
Technical Field
The invention relates to the field of LEDs, in particular to a method for accelerating a resin crack test of an LED.
Background
An LED is a semiconductor component, which is used as an indicator light, a display LED panel, and the like at first, and also used as illumination with the emergence of white LEDs; the LED resin is easy to crack in long-term use, has functional defects, and causes abnormal phenomena such as blue light leakage and the like in backlight or illumination.
The existing reliability test method judges whether the LED is qualified or not through the verification of loading conditions such as environment, temperature, current and the like, wherein the period is 1000 hours, 2000 hours and 3000 hours … … 6000 hours, and the method has the advantages of long waiting time, complicated test rule and inconvenience for rapidly finding the defects of the LED resin; meanwhile, no special device is specially operated for the test in the process of carrying out the test.
Disclosure of Invention
The invention aims to provide a method for an LED accelerated resin crack test, which aims to overcome the defects that the existing reliability test method judges whether an LED is qualified or not by verifying conditions such as loading environment, temperature, current and the like, wherein the periods are 1000 hours, 2000 hours and 3000 hours … … 6000 hours; meanwhile, in the process of carrying out the test, no special device is provided for carrying out special operation aiming at the test.
The purpose of the invention can be realized by the following technical scheme:
a method for accelerating a resin crack test of an LED comprises the following specific operation steps:
the method comprises the following steps: preliminarily measuring the LED lamp strip, adjusting the current of 1 LED lamp strip to a comparison temperature Tr of 125 ℃ when the ambient temperature Ta is 25 ℃, wherein the current is 950mA when the comparison temperature Tr is 125 ℃, and the current is 950mA when the ambient temperature Ta is 25 ℃;
step two: test 1 LED lamp strip in the laboratory, install 1 LED lamp strip on the light-passing board of the swivel mount of test mechanism, test in rotatory to the proof box with LED lamp strip through servo motor, the experimental condition is: the environment temperature Ta is 80 ℃, the feedback current If is 950mA, the circuit is turned on for 1h and then turned off for 15min, and the operation is circulated;
step three: and (4) observing the condition of the LED lamp strip from the interior of the test box to an observation mechanism of the test device through a servo motor every day, and recording the observation result.
As a further scheme of the invention: the testing device comprises a testing mechanism and an observing mechanism, wherein the observing mechanism is installed on one side of the testing mechanism, the testing mechanism comprises a bottom box, a supporting frame, a testing box, a slot, a rotating frame, a light-passing plate, a pull rod, a pull plate, a clamping plate, a spring, an LED lamp strip, an electric push rod, a rotary disc, a servo motor, a driven wheel, a driving wheel, a testing chamber and a temperature sensor, the supporting frame is installed on one side of the bottom box, the testing box is installed at the top end of the supporting frame, the slot is formed in one side of the testing box, the servo motor is installed on one side of the top of the bottom box, the driving wheel is installed at the output end of the servo motor and positioned in the bottom box, a rotary shaft is installed on one side of the inner part of the bottom box in a penetrating manner, the driven wheel, the swivel mount is installed at electric putter top, swivel mount one side is provided with the light-passing board, the light-passing board both sides just are located the inside pull rod that all runs through of swivel mount, splint are installed to pull rod one end, the arm-tie is installed to the pull rod other end, the pull rod outside just is located and overlaps between splint and the swivel mount inner wall and be equipped with the spring, both sides splint just are located the light-passing board top and install LED lamp strip, inside just being located the slot top and having seted up between the experiment, internally mounted has temperature sensor between the experiment.
As a further scheme of the invention: the observation mechanism is a microscope and is matched with the test mechanism for use.
As a further scheme of the invention: the depth of slot is the same with the thickness of swivel mount, swivel mount one side is provided with the electric connector, the electric connector passes through wire and LED lamp strip electric connection, the electric jack has been seted up to one side of slot, and electric jack and electric connector cooperation use.
As a further scheme of the invention: the cross-sectional area of the test room is the same as the area of the top side of the light-transmitting plate, and the LED light bar is provided with a plurality of LEDs.
As a further scheme of the invention: pull rings are installed on the outer sides of the pull plates, and insulating rubber pads are arranged on the inner sides of the clamping plates.
As a further scheme of the invention: the specific method of use of the test device is as follows:
pulling the pulling plates on the two sides, compressing a spring on the outer side of the pulling rod by a clamping plate while the pulling rod on the two sides moves outwards, placing the LED lamp strip between the pulling plates on the two sides, releasing the pulling plates, fixing the LED lamp strip on a light-transmitting plate of a rotating frame by the clamping plate under the action of the spring, electrically connecting an electric connector with the LED lamp strip through a wire, driving a driving wheel to rotate clockwise by the work of a servo motor, driving a rotating disc to rotate through meshing transmission with a driven wheel, further driving the rotating frame to rotate until the rotating frame is screwed into a slot of a test box, electrically connecting an electric jack in the slot with the electric connector, switching on a power supply, sensing the ambient temperature in the test box through a temperature sensor to be Ta which is 80 ℃, and the feedback current If is 950mA, switching off for 15min after switching on for 1;
when observing LED lamp strip, drive action wheel anticlockwise rotation through servo motor work, drive the carousel rotation through the meshing transmission with from the driving wheel, and then it is rotatory to drive the swivel mount, be between microscopical observation mechanism until the swivel mount screw in, through the height of electric putter adjustment swivel mount, guarantee that the swivel mount is located between sight glass and the reflector, observe the LED on the LED lamp strip in proper order through the sight glass, know whether the crackle appears in the LED resin, after finishing the observation, servo motor work is tested in the slot of swivel mount screw in proof box.
The invention has the beneficial effects that: through reasonable structural design, the reliability method for accelerating the resin crack test through the LED is quicker, the LED defect is locked more accurately, the time cost is saved, the time for the LED resin to crack can be detected, and the functional defect after long-time use is avoided, so that the prevention purpose is achieved by adopting measures of reducing the LED current, changing the optical sheet, the heat dissipation mechanism, changing the design and the like;
meanwhile, the LED lamp strips are tested through a special testing device, the springs on the outer sides of the pull rods are compressed by the clamping plates while the pull rods on the two sides move outwards, the LED lamp strips are placed between the pull plates on the two sides, the pull plates are released, and the LED lamp strips are fixed on the light-transmitting plate of the rotating frame by the clamping plates under the action of the springs, so that the LED lamp strips with any size can be fixed and limited conveniently;
servo motor work drives the action wheel and rotates clockwise, drive the carousel through the meshing transmission with from the driving wheel and rotate, and then it is rotatory to drive the swivel mount, until in the slot of swivel mount screw in test box, and electric property jack and electric connection in the slot, test LED lamp strip in the test box, drive action wheel anticlockwise rotation through servo motor work simultaneously, and then it is rotatory to drive the swivel mount, until the swivel mount screw in be between microscopical observation mechanism, through the height of electric putter adjustment swivel mount, guarantee that the swivel mount is located between sight glass and the reflector, observe the LED on the LED lamp strip in proper order through the sight glass, be convenient for through the quick convenient experiment and observation of accomplishing LED lamp strip of holistic cooperation operation, it is convenient at practical application.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the testing mechanism of the present invention;
FIG. 3 is a side view of the trial mechanism of the present invention;
FIG. 4 is a cross-sectional view of a test chamber of the present invention.
In the figure: 1. a testing mechanism; 2. an observation mechanism; 3. a bottom box; 4. a support frame; 5. a test chamber; 6. a slot; 7. a rotating frame; 8. a light-transmitting plate; 9. a pull rod; 10. pulling a plate; 11. a splint; 12. a spring; 13. an LED light bar; 14. an electric push rod; 15. a turntable; 16. a servo motor; 17. a driven wheel; 18. a driving wheel; 19. a test room; 20. a temperature sensor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a method for accelerating a crack test of a resin by an LED includes the following steps:
the method comprises the following steps: preliminarily measuring the LED light bar 13, adjusting the current of the LED light bar 13 to a comparison temperature Tr of 125 ℃ when the ambient temperature Ta is 25 ℃, wherein the current is 950mA when the comparison temperature Tr is 125 ℃, and the current is 950mA when the ambient temperature Ta is 25 ℃;
step two: test LED lamp strip 13 in the laboratory, install LED lamp strip 13 on the light-passing board 8 of the swivel mount 7 of test mechanism 1, rotate LED lamp strip 13 to test in test box 5 through servo motor 16, the test condition is: the environment temperature Ta is 80 ℃, the feedback current If is 950mA, the circuit is turned on for 1h and then turned off for 15min, and the operation is circulated;
step three: and rotating the LED lamp strip 13 from the test box 5 to the observation mechanism 2 of the test device through the servo motor 16 every day to observe the condition of the LED lamp strip 13, and recording the observation result.
The testing device comprises a testing mechanism 1 and an observing mechanism 2, wherein the observing mechanism 2 is installed on one side of the testing mechanism 1, the testing mechanism 1 comprises a bottom box 3, a supporting frame 4, a testing box 5, a slot 6, a rotating frame 7, a light-transmitting plate 8, a pull rod 9, a pull plate 10, a clamping plate 11, a spring 12, an LED light bar 13, an electric push rod 14, a rotary disc 15, a servo motor 16, a driven wheel 17, a driving wheel 18, a testing room 19 and a temperature sensor 20, the supporting frame 4 is installed on one side of the bottom box 3, the testing box 5 is installed at the top end of the supporting frame 4, the slot 6 is formed in one side of the testing box 5, the servo motor 16 is installed on one side of the top of the bottom box 3, the driving wheel 18 is installed at the output end of the servo motor 16 and is located in the bottom box 3, a rotating shaft is installed on one side of, electric putter 14 is installed at 15 tops of carousel, swivel mount 7 is installed at electric putter 14 top, 7 one sides of swivel mount are provided with light-passing board 8, 8 both sides of light-passing board just are located 7 inside all runs through of swivel mount and install pull rod 9, splint 11 are installed to 9 one ends of pull rod, arm-tie 10 is installed to the 9 other ends of pull rod, the cover is equipped with spring 12 in the 9 outside of pull rod and between being located splint 11 and the 7 inner walls of swivel mount, both sides splint 11 just are located light-passing board 8 top and install LED lamp strip 13, 5 inside just are located slot 6 tops and have seted up between the experiment 19, 19 internally mounted has temperature sensor 20 between the experiment, the.
The depth of slot 6 is the same with the thickness of swivel mount 7, and swivel mount 7 one side is provided with the electric connector, and the electric connector passes through wire and LED lamp strip 13 electric connection, and the electric jack has been seted up to one side of slot 6, and electric jack and electric connector cooperation use, and the LED lamp strip 13's of being convenient for electric connection guarantees experimental smooth normal clear.
The cross-sectional area of the test room 19 is the same as the area of the top side of the light-transmitting plate 8, so that the test range can be controlled conveniently, and the LED light bars 13 are provided with a plurality of LEDs, so that a plurality of LEDs can be tested simultaneously.
The pull rings are installed on the outer sides of the pull plates 10 on the two sides, so that the pull plates 10 can be conveniently pulled, the practical operation and the application are convenient, the insulating rubber pads are arranged on the inner sides of the clamping plates 11, and the LED lamp strips 13 are protected and insulated.
The specific method of use of the test device is as follows:
pulling the pulling plates 10 on the two sides, moving the pulling rods 9 on the two sides outwards, compressing the springs 12 on the outer sides of the pulling rods 9 by the clamping plates 11 while moving the pulling rods 9 on the two sides outwards, placing the LED lamp strips 13 between the pulling plates 10 on the two sides, releasing the pulling plates 10, fixing the LED lamp strips 13 on the light-transmitting plate 8 of the rotating frame 7 by the clamping plates 11 under the action of the springs 12, electrically connecting the electrical connectors with the LED lamp strips 13 through wires, driving the driving wheels 18 to rotate clockwise by the servo motor 16, driving the rotating disc 15 to rotate through meshing transmission with the driven wheels 17, further driving the rotating frame 7 to rotate until the rotating frame 7 is screwed into the slot 6 of the test box 5, electrically connecting the electrical jacks in the slot 6 with the electrical connections, switching on the power supply, sensing the ambient temperature in the test box 5 through the temperature sensor 20 that Ta is 80 ℃ and the feedback current If is 950mA, switching off for 15 min;
when observing LED lamp strip 13, drive action wheel 18 anticlockwise rotation through servo motor 16 work, drive carousel 15 through the meshing transmission with from driving wheel 17 and rotate, and then drive swivel mount 7 rotatory, until swivel mount 7 screw in be between microscopical observation mechanism 2, through the height of electric putter 14 adjustment swivel mount 7, guarantee that swivel mount 7 is located between sight glass and the reflector, observe the LED on LED lamp strip 13 in proper order through the sight glass, know whether the crackle appears in the LED resin, the back of finishing is observed, servo motor 16 work is tested in the slot 6 of swivel mount 7 screw in proof box 5.
Through reasonable structural design, the reliability method for accelerating the resin crack test through the LED is quicker, the LED defect is locked more accurately, the time cost is saved, the time for the LED resin to crack can be detected, and the functional defect after long-time use is avoided, so that the prevention purpose is achieved by adopting measures of reducing the LED current, changing the optical sheet, the heat dissipation mechanism, changing the design and the like; meanwhile, the LED lamp strips 13 are tested through a special testing device, the springs 12 on the outer sides of the pull rods 9 are compressed by the clamping plates 11 while the pull rods 9 on the two sides move outwards, the LED lamp strips 13 are placed between the pull plates 10 on the two sides, the pull plates 10 are released, and the LED lamp strips 13 are fixed on the light-transmitting plate 8 of the rotating frame 7 by the clamping plates 11 under the action of the springs 12, so that the LED lamp strips 13 with any size can be conveniently fixed and limited; servo motor 16 work drives action wheel 18 and rotates clockwise, drive carousel 15 through the meshing transmission with from driving wheel 17 and rotate, and then it is rotatory to drive swivel mount 7, until swivel mount 7 screw in slot 6 of proof box 5, and electrical property jack and electric connection in the slot 6, test LED lamp strip 13 in proof box 5, drive action wheel 18 anticlockwise rotation through servo motor 16 work simultaneously, and then it is rotatory to drive swivel mount 7, until swivel mount 7 screw in be between microscopical observation mechanism 2, through the height of electric putter 14 adjustment swivel mount 7, guarantee that swivel mount 7 is located between sight glass and the reflector, observe the LED on LED lamp strip 13 in proper order through the sight glass, be convenient for through the quick convenient experiment and the observation of accomplishing LED lamp strip 13 of the holistic cooperation operation of device, the convenience is in practical application.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A method for accelerating a resin crack test of an LED is characterized by comprising the following specific operation steps:
the method comprises the following steps: preliminarily measuring the LED lamp strips (13), adjusting the current of 1 LED lamp strip (13) to a comparison temperature Tr of 125 ℃ when the ambient temperature Ta is 25 ℃, wherein the current is 950mA when the comparison temperature Tr is 125 ℃, and the current is 950mA when the ambient temperature Ta is 25 ℃;
step two: test 1 LED lamp strip (13) in the laboratory, install 1 LED lamp strip (13) on light-passing board (8) of swivel mount (7) of test mechanism (1), rotate LED lamp strip (13) to experimental box (5) in through servo motor (16) and test, the experimental condition is: the environment temperature Ta is 80 ℃, the feedback current If is 950mA, the circuit is turned on for 1h and then turned off for 15min, and the operation is circulated;
step three: the LED light bar (13) is rotated from the test box (5) to the observation mechanism (2) of the test device by the servo motor (16) every day to observe the condition of the LED light bar (13), and the observation result is recorded.
2. The method for accelerating the resin crack test of the LED according to claim 1, wherein the test device comprises a test mechanism (1) and an observation mechanism (2), the observation mechanism (2) is installed on one side of the test mechanism (1), the test mechanism (1) comprises a bottom case (3), a support frame (4), a test case (5), slots (6), a rotating frame (7), a light-transmitting plate (8), a pull rod (9), a pull plate (10), a clamping plate (11), a spring (12), an LED light bar (13), an electric push rod (14), a rotary table (15), a servo motor (16), a driven wheel (17), a driving wheel (18), a test chamber (19) and a temperature sensor (20), the support frame (4) is installed on one side of the bottom case (3), the test case (5) is installed on the top end of the support frame (4), the slots (6) are formed on one side of the test case (5), install servo motor (16) on one side of under casing (3) top, servo motor (16) output just is located under casing (3) internally mounted and has action wheel (18), under casing (3) internal volume one side is run through and is installed the pivot, and installs from driving wheel (17) pivot bottom, from driving wheel (17) and action wheel (18) intermeshing, carousel (15) are installed on pivot top and being located under casing (3) top side, electric putter (14) are installed at carousel (15) top, swivel mount (7) are installed at electric putter (14) top, swivel mount (7) one side is provided with light-passing board (8), pull rod (9) are all run through and are installed to light-passing board (8) both sides and being located swivel mount (7) inside, splint (11) are installed to pull rod (9) one end, arm-tie (10) are installed to the pull rod (9) other end, pull rod (9) outside just is located and is equipped with spring (12), both sides between splint (11) and swivel mount (7) inner wall the LED lamp strip (13) are installed to splint (11) and are located light-passing board (8) top, test chamber (5) are inside and are located slot (6) top and have seted up between the experiment (19), between the experiment (19) internally mounted has temperature sensor (20).
3. The method for the LED accelerated resin crack test according to the claim 2, characterized in that the observation mechanism (2) is a microscope and is used in cooperation with the test mechanism (1).
4. The method for accelerating the resin crack test of the LED as recited in claim 2, wherein the depth of the slot (6) is the same as the thickness of the rotating frame (7), an electrical connector is disposed on one side of the rotating frame (7), the electrical connector is electrically connected with the LED light bar (13) through a wire, an electrical jack is disposed on one side of the slot (6), and the electrical jack and the electrical connector are used in cooperation.
5. The method for accelerating the crack test of the LED resin as claimed in claim 2, wherein the cross-sectional area of the test chamber (19) is the same as the top side area of the light-transmitting plate (8), and a plurality of LEDs are mounted on the LED light bar (13).
6. The method for accelerating the crack test of the LED resin as claimed in claim 2, wherein the pull tab is installed on the outer side of the pull plate (10) on both sides, and the insulating rubber pad is installed on the inner side of the clamping plate (11).
7. The method for accelerating the crack test of the LED resin as claimed in claim 2, wherein the specific using method of the test device is as follows:
pulling pull plates (10) on two sides, allowing pull rods (9) on two sides to move outwards, compressing a spring (12) on the outer side of each pull rod (9) by using clamping plates (11), placing an LED lamp bar (13) between the pull plates (10) on two sides, releasing the pull plates (10), fixing the LED lamp bar (13) on a light-transmitting plate (8) of a rotating frame (7) by using the clamping plates (11) under the action of the spring (12), electrically connecting an electric connector with the LED lamp bar (13) through a wire, driving a driving wheel (18) to rotate clockwise by using a servo motor (16) to work, driving a rotating disc (15) to rotate through meshing transmission with a driven wheel (17), further driving the rotating frame (7) to rotate until the rotating frame (7) is screwed into a slot (6) of a test box (5), electrically connecting a jack in the slot (6) with the electric connection, switching on a power supply, sensing that the ambient temperature in the test box (5) is Ta 80 ℃ through a temperature sensor (20), and the feedback current If is 950mA, the circuit is closed for 15min after being opened for 1h, and the operation is circulated;
when observing LED lamp strip (13), drive action wheel (18) anticlockwise rotation through servo motor (16) work, drive carousel (15) through the meshing transmission with follow driving wheel (17) and rotate, and then drive swivel mount (7) rotatory, until swivel mount (7) screw in be between microscopical observation mechanism (2), through the height of electric putter (14) adjustment swivel mount (7), guarantee that swivel mount (7) are located between sight glass and the reflector, observe the LED on LED lamp strip (13) in proper order through the sight glass, know whether the crackle appears in the LED resin, after the observation finishes, slot (6) of swivel mount (7) screw in proof box (5) are tested in servo motor (16) work.
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