When you need to assemble the ipad touch screen, you need to pay attention to these important points, or you may damage your ipad, so you must need learn some skills when you need to repair it
Glass Sampling
All REWA glass lens have to go through tough tests like bending test, drop test, hydrophobic effect test, etc. to ensure the outstanding quality.
iPad Touch Screen Assembly Sample Groups
During glass sampling process, there are three sample groups for comparison.
Group (A)——REWA AAA Grade
Group (B)——OEM New
Group (C)——Prevail on the Market
1. Bending Test
Run bending test on iPad Touch Screen Assembly groups (A), (B) and (C) respectively.
Max Bending Force Value:
Group (A)——72.86kgf
Group (B)——78.16kgf
Group (C)——30.76kgf
Bending Test Result：
Group (A)——Good
Group (B)——Excellent
Group (C)——Poor
2.Drop Test
Run drop test on iPad Touch Screen Assembly groups (A), (B) and (C) respectively. Each sample goes through three times continuously.
Max Drop Strength Value:
Group (A)——90cm/90g
Group (B)——90cm/90g
Group (C)——80cm/65g
Drop Test Result：
Group (A)——Excellent
Group (B)——Excellent
Group (C)——Poor
3.Dimension Measurement
Thickness parameters of iPad Touch Screen Assembly groups (A), (B) and (C) are as following:
Group (A)——0.57mm
Group (B)——0.56mm
Group (C)——0.58mm
4.Hydrophobic Effect Comparison
5.Light Transmittance Test
Before the test, tear off the protective film and run cosmetic inspection of iPad Touch Screen Assembly groups (A), (B) and (C). After that, run Light Transmittance Test under dimly lit environment.
Visible light transmittance value of Camera hole (550nm) :
Group (A)——95%
Group (B)——95%
Group (C)——92%
Visible light transmittance value of the touch panel Functional area (550nm):
Group (A)——92%
Group (B)——93%
Group (C)——92%
6.Home Button Alignment
Install home button for a look——all glass lens fit perfectly well.
To conclude:
Group (A) runs with a good performance during all those tests. REWA AAA Grade proves to be qualified for the following assembly producing process.
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