G - Physics
06
F
375/53
G06F 3/033 (2006.01) G06F 3/14 (2006.01)
Patent
CA 1301382
M14-45016M(F-4749-03)/MS ABSTRACT OF THE DISCLOSURE In a display unit comprising a plate-shaped display panel with X-Y matrix electrodes consisting of two groups of electrodes, X-axis electrodes and Y-axis elec- trodes, display signals are applied to the X-Y matrix electrodes, a.c. current is applied to at least one group of electrodes one after another, and the phase of the a c. current is compared with that of the output of an input pen having means for detecting the magnetic flux induced by the a.c. current, so that the position of the input pen on the display panel is detected from the result of the comparison.
544903
Iwata Syuji
Nakano Masaaki
Saito Yusaku
Watanabe Syoyu
Mitsubishi Denki Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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