Unless you want to replace the LCD, there is not much of an option. The issue is that it is a hardware issue, there have been many reports of this occuring with this device in particular. As the display quality is average to put it nicely, if the LCD is stressed physically then it is known for this issue to occur. If the light bleeding is not too bad then you might just be able to use the device without any problems. However if it really becomes a problem it might be worth either getting a new LCD for the phone or just to buy a new phone. Sadly there is not much you can do besides what I mentioned.