| 摘要 |
A capacitance detecting method disclosed herein, which achieves a good detection accuracy, a good resolution, and a high-speed operation, (A)(a)drives, on the basis of code sequences(di(=di1, ..., diN, where i=1, ..., M)) which are orthogonal to one another, drive lines(DL1, ..., DLM) in parallel for each of (I) a first capacitance column(Ci1) between the drive lines and a first sense line(SL1) and (II) a second capacitance column(Ci2) between the drive lines and a second sense line(SL2) and (b) outputs(sFirst = (s11, ..., S1N)) from the column(Ci1) and outputs(sSecond = (s21, ..., s2N)) from the column(Ci2), and (B) estimates (a) on the basis of inner product operation of the outputs(sFirst) and the code sequences(di), a first capacitance value in the column(Ci1) and (b) on the basis of inner product operation of the outputs(sSecond) and the code sequences(di), a second capacitance value in the column(Ci2). |
