Patent ID: 7703926

Claim:
A briefing system used to project an image onto a projection screen to produce a projection picture, said briefing system comprising: a pointer capable of projecting an indication point in a region on said projection screen and covered by said projection picture; and a projector comprising: a hollow casing; a projection control unit fixedly disposed in said casing and used to receive a screen image of a computer and project said screen image onto said projection screen to produce said projection picture, said screen image received by said projection control unit is output by said computer and said image captured by said image capturing unit is input to said computer for analysis, said computer calculates a location where the cursor on a computer screen should reach corresponding to said indication point on said projection screen according to relative locations of said indication point and said projection picture in said image received from said image capturing unit, and moves the cursor on the screen to there; and an image capturing unit fixedly disposed at a location in said casing where it can capture said whole projection picture produced by said projection control unit and capture an image of said projection screen including said projection picture and said indication point.