Projectors assumed a great significance at the recent InfoComm 2009, the same way it has become important in various applications as well. Through the years, this device has evolved and has become in every presentations no matter how big or small the audience may be.rnFig. 1 shows the division into four areas of the business development of projectors. The horizontal axis shows whether the sender of information is near the projector when the projector is used. More specifically, the right side of the figure indicates that a person, who is on the side of sending information, presents at the scene where the projector is used. On the other hand, the left side of the figure indicates unattended exhibition.
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