All monitors built around TN panels seem to have this issue. It is seems to be "standard" for these inexpensive monitors. This is just something you are gonna have to accept.
More expensive monitors using PVA, MVA, IPS can have similar backlight bleeding issues, but it is less wide spread. My two monitors listed in my signature do not display any backlight bleeding unless I am looking at a black background in a dark room. But then again I did spend $800 for the Planar and $1,200+ for the NEC.
Here's a review of my Asus VK246H monitor that uses a TN panel. For the most part the monitor is good for watching movies and playing games (1.6ms of input lag) and is not looking to break the bank.