Most iphone4 have fine horizontal interlace onscreen (with a test picture)

Hi all,

I have noticed some very fine horizontal lines on my iphone4 screen with IOS 4.3.5,Its not as silky smooth looking as it was.

they are very fine unless you look carefully you can see a lot of thin horizontal lines on the entire screen.It is a very persistent flicker with flashing horizontal lines on the whole display.

Do you guys have this problem?If you can‘t see it ,use this picture to test it.Save this picture( Full-size image with 640*960,not the Thumbnail) to you camera roll or photo libray,then check it without Zoom in or out,you would see the top and bottom bar flickering.

The test image is using for test screen glitches，it just make you see the interlace flicker more clearly,If the test image flickers on your iphone4 ,you definitely have this issue.Actually,if you are sensitive enough and see carefully at the top bar ,especiall on the lockscreen date bar,you would see fine horizontal lines ,even that you can see the horizontal pixel.The impact is that the screen is not sharp enough as a "retina display"What I am wondering is that they seem to go away after the phone has been in use for a little while and "warms up". Is that a hardware issue?It seems more like software issue.

I found that some guys have the same problem

https://discussions.apple.com/thread/2785959

http://forums.macrumors.com/showthread.php?t=995716

I suspect a relationship with production batches,the screens from different batches need different refresh rate,maybe very small difference,but apple doesn't take it into account