Patent ID: 6636199
Filing Date: 2003-10-21
Classification: A63F,G06F

Abstract:
A coordinate input apparatus comprising a fixed unit fixed at a predetermined position and a pointing device operated by a user, said coordinate input apparatus for inputting coordinate data representing coordinates by said pointing device,wherein said fixed unit comprises: first reception means for receiving a first signal from said pointing device, and first transmission means for transmitting a second signal to said pointing device, and wherein said pointing device comprises: second reception means for receiving said second signal from said first transmission means, coordinate calculation means for calculating the coordinate data on the basis of said second signal received by said second reception means, and second transmission means for transmitting at least the coordinate data calculated by said coordinate calculation means to said first reception means as the first signal, wherein said second reception means comprises a plurality of line sensors laid out in different directions, wherein each of said line sensors comprises a linear photoelectric conversion element having a circulative charge transfer path constituted by a plurality of cells, and wherein said line sensor is constructed to transfer charges simultaneously from all pixels of an arbitrary linear photoelectric conversion element to a charge transfer path connected to the circulative charge transfer path as a branch and then transfer the charges to the circulative charge transfer path, or transfer the charges simultaneously from all pixels of an arbitrary linear photoelectric conversion element directly to the circulative charge transfer path.