| 摘要 |
PURPOSE: A keypad assembly is provided to reduce a connection line between two-step switches and a controller by forming a plurality of the two-step switches into a serial arrangement of a column and row unit. CONSTITUTION: A plurality of first switch groups includes a structure in which a capacitance sensor and a dome switch are combined. The structure connects a two-step switch which receives two kinds of inputs to a single switch in a column direction using a serial arrangement mode in order to simultaneously output an output signal of the dome switch and the capacitance sensor. A plurality of second switch groups simultaneously outputs the output signal of the dome switch and the capacitance sensor(170) by connecting the two-step switch in a row direction using the serial arrangement mode. A controller(180) determines a row and a column of the two-step switch which is pressurized or touched by a user.
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