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Hey ila8030,

Thanks for the question. We'll need to isolate this issue further to determine if it is hardware related:

iPhone: Hardware troubleshooting

http://support.apple.com/kb/TS2802

Display image issues

This can include bright or dark pixels, lines in video, or sections of video missing.

1. Try turning iPhone off and then on again.

2. Verify the issue is not content related, by viewing different content.

3. If the image is too dark, adjust the brightness. In General Settings choose Brightness and Wallpaper and slide the slider.

If the issue persists, restore the iPhone:

Choosing an iOS backup method (Should I use iTunes or iCloud to back up my iOS device?)

http://support.apple.com/kb/HT5262

iTunes: Restoring iOS software

http://support.apple.com/kb/HT1414

If after a restore, the issue continues. See the iPhone Service FAQ:

Apple - Support - Service Answer Center

http://apple.com/support/iphone/service/faq

Thanks,

Matt M.

what to do if it happen iphone 5s?