CN103852389A - Method for testing impact strength of light guide plate - Google Patents
Method for testing impact strength of light guide plate Download PDFInfo
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- CN103852389A CN103852389A CN201210504234.0A CN201210504234A CN103852389A CN 103852389 A CN103852389 A CN 103852389A CN 201210504234 A CN201210504234 A CN 201210504234A CN 103852389 A CN103852389 A CN 103852389A
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- light guide
- guide plate
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Abstract
A method for testing the impact strength of a light guide plate comprises the following steps: allowing the light guide plate to stand at a preset temperature for a test time, and allowing the light guide plate to stand at normal temperature; detecting that whether the light guide plate subjected to the impact test is normal or not; and carrying out impact test of the light guide plate in all axial directions if the light guide plate is normal. The method for testing the impact strength of the light guide plate is characterized in that the light guide plate stands at a preset temperature (55-65DEG C) for a test time to carry out the high temperature ageing test of the light guide plate; and the impact test step of the light guide plate subjected to the ageing test in high temperature environment comprises the processes of carrying out the strength impact of the light guide plate by outside force, and detecting that whether the light guide plate subjected to the impact test is normal or not, so the impact strength test of the light guide plate is completed.
Description
Technical field
The present invention relates to light guide plate measuring technology, particularly relate to a kind of light guide plate impact strength method of testing.
Background technology
Light guide plate is widely used in the field such as back light model setting technology and Illuminative for sign, its principle is to utilize acryl/PC sheet material (polycarbonate plate) of optical grade, then with thering is high reflectivity and the hitech materials of extinction not, stamp leaded light site in the acryl sheet material bottom surface of optical grade with UV screen printing technology.The light that utilizes optical grade acryl sheet material to draw to send from lamp is in the stop on optical grade acryl sheet material surface, in the time that light is mapped to each leaded light site, reflected light can be toward all angles diffusion, then destroy conditioned reflex and penetrate by light guide plate is positive, light guide plate is the high-tech product that line source is changed into area source.
Light guide plate is mainly by PC material or PMMA(polymethylmethacrylate) material is made, and be most widely used with PMMA material, PMMA material light guide plate also claims optics acrylic plate, or be acrylic, be commonly called as organic glass, its chemical name is methymethacrylate, and its proportion is every cubic metre of 1190kg.Transparent acrylic sheet material has very high transmittance, applies very extensive.
Thereby light guide plate is in widespread use of all trades and professions.Whether have stain, leak source, shortcoming but the detection method of light guide plate quality still rests on leaded light site, whether area source is even, whether light guide plate occurs in the basic detection aspect such as atomization, cracking.But in actual use, the light guide plate after long-term use can occur causing the abnormal occurrencies such as light guide plate cracking, distortion because of undercapacity because of extraneous impact, and then affect the homogeneity etc. of light guide plate light guide effect, area source.
Summary of the invention
Based on this, be necessary to provide a kind of light guide plate impact strength method of testing that can detect light guide plate and whether meet long-term working strength requirement.
A kind of light guide plate impact strength method of testing, comprises the following steps:
Light guide plate is placed under preset temperature reach the test duration after more at normal temperatures leave standstill; Described preset temperature is 55 DEG C-65 DEG C; The described test duration is 220 hours-260 hours;
Whether normally detect described light guide plate; If so, described light guide plate is carried out to shock-testing; Wherein, successively each of described light guide plate axially carried out to shock-testing;
The concrete steps of described shock-testing comprise:
Set the shock wave of physical shock test platform;
Described light guide plate is fixed on described physical shock test platform, controls described physical shock test platform and impact described light guide plate according to the shock wave size of setting;
Described shock wave size is 45G/11ms-55G/11ms.
In an embodiment, described light guide plate leaves standstill 2 hours at normal temperatures therein.
In an embodiment, described shock wave size is 50G/11ms therein.
In an embodiment, to each axially described physical shock test platform impact of employing of described light guide plate, and after each axial shock-testing completes, whether normally detect described light guide plate therein.
In an embodiment, it is characterized in that therein, whether normally under illumination 200lux, detect described light guide plate, and record testing result.
In an embodiment, it is characterized in that therein, also comprise: be recorded in and under default incubator, place the testing result that reaches result that test duration the described light guide plate of normal temperature after static detect and record and carry out at normal temperatures the described light guide plate of shock-testing.
Above-mentioned light guide plate impact strength method of testing is first placed into the test duration by light guide plate under preset temperature (55 DEG C-65 DEG C), first to carrying out the high temperature ageing test of light guide plate.The light guide plate of carrying out under hot environment after burn-in test is carried out to shock-testing, adopt external force to carry out strength impact to light guide plate, whether normally then detect the light guide plate of carrying out after shock-testing.Thereby complete the impact strength test of light guide plate.
Brief description of the drawings
Fig. 1 is the process flow diagram of light guide plate impact strength method of testing.
Embodiment
As shown in Figure 1, be the process flow diagram of light guide plate impact strength method of testing.
Usually can extract 5 light guide plate to be detected out, before adopting light guide plate impact strength method of testing, the abnormal occurrence such as light guide plate surface requirements does not ftracture, is out of shape and surface is inhomogeneous.Conventionally carrying out above-mentioned Ordinary fruit quality inspection is in order to confirm light guide plate quality, ensures follow-up test validity.
Especially, test environment illumination is 200 ± 10Lux.
A kind of light guide plate impact strength method of testing, comprises the following steps:
Step S110, light guide plate is placed under preset temperature reach the test duration after more at normal temperatures leave standstill.
Preset temperature is 55 DEG C-65 DEG C.Preferably, preset temperature is 60 DEG C.
Test duration is 220 hours-260 hours.Preferably, the test duration is 240 hours.Under preset temperature, place the time after test that reaches, need leave standstill at normal temperatures and after at least 2 hours, just can carry out next step test.
Step S110 is the test of simulation high temperature ageing.
In an embodiment, the concrete steps of light guide plate being carried out to high temperature ageing test are therein: light guide plate is placed in sweat box, the temperature of sweat box is made as to 60 DEG C, set the test duration is 240 hours simultaneously.Start-up temperature case carries out high temperature ageing test.Reach after 240 hours test durations, light guide plate is taken out at normal temperatures and left standstill.
Whether normal step S120, detect described light guide plate; If so, perform step S130 described light guide plate is carried out to shock-testing; Wherein, successively each of described light guide plate axially carried out to shock-testing.
The light guide plate of carrying out high temperature ageing by step S110 and leave standstill after at least 2 hours is at normal temperatures detected, confirm that whether the light guide plate after high temperature ageing test is normal.If so, carry out shock-testing.
The concrete steps of shock-testing are:
1. set the shock wave of physical shock test platform.
2. described light guide plate is fixed on described mechanical test platform, controls described physical shock test platform and impact described light guide plate according to the shock wave size of setting.
Carry out needing to set specified shock wave before shock-testing.Usually, according to the weight of the device of light guide plate and lightguide plate fixing, adopt identical weight sub to be placed in impact platform.Then opening impact platform, impacts podium level or exchange buffering material by adjustment, and half-sine wave is beaten in examination, makes it produce specified shock wave.The process of setting shock wave is for the energy of physical shock test platform is confirmed, guarantees the validity of subsequent impacts test.
Shock wave size is set as 45G/11ms-55G/11ms.Preferably, shock wave size is made as 50G/11ms.
The device of lightguide plate fixing is fixed on light guide plate on physical shock test platform, controls mechanical impact test platform and impact light guide plate according to the shock wave size of setting.After each shock-testing completes, need detect light guide plate, if find that there is cracking, distortion or surperficial inhomogeneous when abnormal, stop this test.
Whether normal step S130, to each axially described physical shock test platform impact of employing of described light guide plate, and after each axial shock-testing completes, detect described light guide plate.
Generally axially carry out shock-testing to six of light guide plate respectively.Particularly, six of light guide plate be axially respectively ± X-axis, ± Y-axis and ± Z axis.By axially carrying out shock-testing to six of light guide plate, guarantee that light guide plate all can be embodied in the thin spot of all directions, to ensure the complete and accurate of impact strength test result.
Based on above-mentioned all embodiment, whether normally generally under illumination 200lux, detect described light guide plate, and record testing result.
Step S140, is recorded in and under default incubator, places the testing result that reaches result that test duration the described light guide plate of normal temperature after static detect and record and carry out at normal temperatures the described light guide plate of shock-testing.
After high temperature ageing test, need to carry out conventional Quality Detection to light guide plate, occur extremely, recording testing result and stopping this test if detect light guide plate.If it is normal to detect light guide plate, carry out follow-up shock-testing.Because shock-testing needs axially carry out at six of light guide plate respectively, but in general, as long as after one-shot test, there is extremely will finishing this test in light guide plate.Therefore, need to carry out record to the testing result of the light guide plate of carrying out shock-testing under normal temperature.
Above-mentioned light guide plate impact strength method of testing is first placed into the test duration by light guide plate under preset temperature (55 DEG C-65 DEG C), first to carrying out the high temperature ageing test of light guide plate.The light guide plate of carrying out under hot environment after burn-in test is carried out to shock-testing, adopt external force to carry out strength impact to light guide plate, whether normally then detect the light guide plate of carrying out after shock-testing.Thereby complete the impact strength test of light guide plate.
Adopt the method for testing of above-mentioned light guide plate impact strength, can effectively filter out the poor product of light guide plate impact strength, or after long-term use, may exist light guide plate impact strength cannot meet market request for utilization product because Material degradation causes light guide plate impact strength to reduce.The too low light guide plate that likely can cause of light guide plate impact strength, in the time suffering External Force Acting, cannot normally work or affect client and use.Method of testing by above-mentioned light guide plate impact strength can detect the light guide plate that may have design defect, and rectify and improve and passing through of verifying again by technology, can be user provides high-quality light guide plate that foundation is provided, make the product can be after long-term use, still there is higher quality level, meet the long-term demand using of user.
Based on above-mentioned all embodiment, the process that adopts above-mentioned light guide plate impact strength method of testing to test a collection of light guide plate is as follows:
From model machine, extract 5, light guide plate model to be detected, require the light guide plate surface abnormal occurrencies such as cracking, distortion and surface be not inhomogeneous.According to step S110, test sample plate is positioned over and is placed in constant temperature oven, open constant temperature oven and carry out high temperature ageing test, wherein, temperature is made as 60 DEG C, and the test duration is made as 240 hours.After high temperature ageing has been tested, light guide plate is placed at normal temperatures to the test of carrying out again next step after at least 2 hours.Carrying out before next step shock-testing, require to detect light guide plate whether normal in high temperature ageing test, if not, stop this test.If so, carrying out shock-testing.Light guide plate is placed on physical shock test platform, and six of the shock wave impact light guide plate taking size as 50G/11ms axially.After each axial impact completes, whether normally all to detect light guide plate, if carry out lower axial shock-testing, if not, stop this test.Complete after six axial shock-testings, light guide plate is carried out to conventional Quality Detection, while not finding that the abnormal occurrencies such as cracking, distortion and surface be inhomogeneous appear in light guide plate surface, think that this light guide plate impact strength can meet the shock resistance requirement of long-term use, can avoid the light guide plate that may occur after long-term use to damage extremely, meet the long-term requirement using of product.
By above-mentioned light guide plate impact strength method of testing, can detect at short notice the poor light guide plate of impact strength, avoid bringing unnecessary loss to user.Can, by change in design, strengthen the impact resistance of light guide plate simultaneously, avoid the too low light guide plate of impact strength to appear on market.Reduce follow-up because the problem that light guide plate cannot normally be worked may appear in long-term use, reduction after-sales service cost.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. a light guide plate impact strength method of testing, comprises the following steps:
Light guide plate is placed under preset temperature reach the test duration after more at normal temperatures leave standstill; Wherein, described preset temperature is 55 DEG C-65 DEG C; The described test duration is 220 hours-260 hours;
Whether normally detect described light guide plate; If so, described light guide plate is carried out to shock-testing; Wherein, successively each of described light guide plate axially carried out to shock-testing;
The concrete steps of described shock-testing comprise:
Set the shock wave of physical shock test platform;
Described light guide plate is fixed on described physical shock test platform, controls described physical shock test platform and impact described light guide plate according to the shock wave size of setting;
Described shock wave size is 45G/11ms-55G/11ms.
2. light guide plate impact strength method of testing according to claim 1, is characterized in that, described light guide plate leaves standstill 2 hours at normal temperatures.
3. light guide plate impact strength method of testing according to claim 1, is characterized in that, described shock wave size is 50G/11ms.
4. light guide plate impact strength method of testing according to claim 1, it is characterized in that, to each axially described physical shock test platform impact of employing of described light guide plate, and after each axial shock-testing completes, whether normally detect described light guide plate.
5. according to the light guide plate impact strength method of testing described in claim 1-4 any one, it is characterized in that, whether normally under illumination 200lux, detect described light guide plate, and record testing result.
6. according to the light guide plate impact strength method of testing described in claim 1-4 any one, it is characterized in that, also comprise: be recorded in and under default incubator, place the testing result that reaches result that test duration the described light guide plate of normal temperature after static detect and record and carry out at normal temperatures the described light guide plate of shock-testing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210504234.0A CN103852389A (en) | 2012-11-28 | 2012-11-28 | Method for testing impact strength of light guide plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210504234.0A CN103852389A (en) | 2012-11-28 | 2012-11-28 | Method for testing impact strength of light guide plate |
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| CN103852389A true CN103852389A (en) | 2014-06-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186636A (en) * | 2019-06-04 | 2019-08-30 | Oppo广东移动通信有限公司 | The test method of shell |
| CN111157374A (en) * | 2019-12-31 | 2020-05-15 | 同济大学 | Semi-sinusoidal impact test method for evaluating performance of energy absorption pad with porous structure of automobile battery |
Citations (4)
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| JPH0229963B2 (en) * | 1977-07-27 | 1990-07-03 | Battelle Development Corp | |
| RU2194966C2 (en) * | 2001-02-06 | 2002-12-20 | Институт радиотехники и электроники РАН | Method predicting time of no-failure operation of light guides |
| CN1430053A (en) * | 2001-12-30 | 2003-07-16 | 宝山钢铁股份有限公司 | Method and device for evaluating anti-concavity of metal thin sheet |
| JP2010071715A (en) * | 2008-09-17 | 2010-04-02 | Fuji Xerox Co Ltd | Testing machine for testing bending resistance of waveguide |
-
2012
- 2012-11-28 CN CN201210504234.0A patent/CN103852389A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0229963B2 (en) * | 1977-07-27 | 1990-07-03 | Battelle Development Corp | |
| RU2194966C2 (en) * | 2001-02-06 | 2002-12-20 | Институт радиотехники и электроники РАН | Method predicting time of no-failure operation of light guides |
| CN1430053A (en) * | 2001-12-30 | 2003-07-16 | 宝山钢铁股份有限公司 | Method and device for evaluating anti-concavity of metal thin sheet |
| JP2010071715A (en) * | 2008-09-17 | 2010-04-02 | Fuji Xerox Co Ltd | Testing machine for testing bending resistance of waveguide |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186636A (en) * | 2019-06-04 | 2019-08-30 | Oppo广东移动通信有限公司 | The test method of shell |
| CN110186636B (en) * | 2019-06-04 | 2021-10-01 | Oppo广东移动通信有限公司 | Shell testing method |
| CN111157374A (en) * | 2019-12-31 | 2020-05-15 | 同济大学 | Semi-sinusoidal impact test method for evaluating performance of energy absorption pad with porous structure of automobile battery |
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Application publication date: 20140611 |