| 摘要 |
A coordinate input device including a matrix-type display panel having a plurality of row electrodes arranged in parallel, a plurality of column electrodes arranged in parallel, the row electrodes and the column electrodes being disposed to face each other, and liquid crystal disposed between the row electrodes and the column electrodes. The device also includes a row electrode driving circuit, a column electrode driving circuit, a controller for controlling these driving circuits, an input pad disposed to allow direct contact with the operator, and a coordinate detection circuit for calculating a coordinate value based on a signal input thereto through the input pad. When a position on the display panel is pressed with a finger, a driving signal supplied to the row electrode or the column electrode corresponding to the position is transmitted through the operator to the input pad. The coordinate of the position is detected based on the transmitted signal.
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