A Japanese Mac blog, Macotakara, is claiming that Sony Mobile Display Corporation and Hitachi Displays have begun shipping new 4-inch displays for a new iOS device. The blog doesn’t elaborate which device the new dispalys will be used for, but the obvious choice is the next generation iPhone.

According to the blog:

According to Asian source, Hitachi Displays, Ltd. and Sony Mobile Display Corporation started to ship 4-inch LCD for new iOS device and LCD for iPad 3. These 2 companies will be merged their business with Toshiba Mobile Display Co., Ltd., as “Japan Display” in 2012 spring.

It’s often been rumored that Apple was exploring using a larger display on future iOS devices. To date Apple has only used a 3.5-inch display across its family of iPhones. Apple chose to stick with the 3.5-inch display because they felt it was better suited for one-handed use.

Do you think we’ll see a larger display on the iPhone5? Tell us what you think in the comments.