The iPhone is a great smartphone, but when it comes to sharing information, pictures, and videos with others, the screen size can be very limiting. Luckily, there is a rather simple accessory that eliminates this problem.

Japan-based accessory maker Sanwa Supply has just started selling the 400-PRJ011 at its online store, a DLP micro-projector that slides onto your iPhone 4 (or 4S). The unit comes with a 2,100mAh battery that can be used to extend the life of your iPhone, and allows enough juice for 2.5 hours of projector usage. The actual projection is capable of a 640×360 resolution and can project up to 65-inches in size.

While this version is targeted at the Japanese market, it is also available in the US in the form of the Brookstone Pocket Projector, which we covered back in November.

Sanwa is selling its 400-PRJ011 for 19,800 Yen (roughly $260), while the Brookstone model is just $230.

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