Sony Compact Pocket Size Mobile projector MP-CD1
This is a highly portable mobile size projector. it may be little costly but if you love the idea and like to carry/use such portable projector and have no budget issue then you should definitely go for it. its a good quality gadget from sony, although the battery may last little less (1 or 2 hours) on single charge. you can connect it with your mobile using wireless connectivity and hdmi dongle.Please read all instructions before buying.