列线

列线是键盘矩阵中关键的导电元件，通常垂直排列，与行线形成网格。它们是扫描电路的一个轴，通过按键按下时连接特定行和列，实现电气连续性，从而检测按键闭合。这些线设计用于承载低电压信号，并集成在矩阵的PCB或薄膜结构中。

列线的工作原理是构成扫描矩阵的一部分，每个按键位于行线和列线的交叉点。当按键按下时，会在对应的行线和列线之间建立电气连接。微控制器依次激活行线，并监测列线的电压变化，根据检测到信号的特定行列交叉点来识别按下的按键。

Column lines operate by forming part of a scanning matrix where each key is at the intersection of a row and column line. When a key is pressed, it creates an electrical connection between its corresponding row and column lines. A microcontroller sequentially activates row lines and monitors column lines for voltage changes, identifying the pressed key based on the specific row-column intersection that registers a signal.