Toshiba has announced its line-up of products it will show off at SID Display Week 2011 this week and one of them will be 4-inches and 720p HD.

The mobile section of the booth will feature high-resolution LTPS displays, up to 367ppi (pixels per inch) resolution density, in sizes ranging from 3.3-inch to 4.0-inch with resolution formats ranging from Wide VGA (480 x 864) to HD (720 x 1280). In addition, these displays will demonstrate advanced technologies such as high-contrast (up to 1,500:1), high-color (up to 92% NTSC), and wide viewing angle (up to H/V 176º/176º). The displays are just a few representative examples of TMD's broad line of thin and light displays for mobile smartphones and other portable electronic devices.

Rumors have been circulating for a while now that Toshiba was building a plant to specifically supply Apple with LCD screens for iPhone models. Could this be the reason? Maybe, may not.

The iPhone 3GS has a resolution of 480 x 320, the iPhone 4 has double that at 960 x 640 and the new Toshiba display has a resolution of 1280 x 720. iPhone 4's 960 x 640 was the same 4:3 aspect ration exactly double the previous generations 480 x 320, and was therefore broadly compatible. 1280 x 720 is not only incompatible in terms of resolution but in terms of aspect ratio.

Rumors are still pointing to the next generation iPhone being delayed until later this year. It would appear that this timeframe is still too soon to see these panels. But what about iPhone 6?

Apple hasn't fragmented iPhone displays in the past, would they in the future? And could they come up with some resolution magic so developers aren't left with the headache of writing apps for multiple different screen resolutions?

[Toshiba via TUAW]