公开(公告)号：US08736115B2

公开(公告)日：2014-05-27

申请号：US13094098

申请日：2011-04-26

申请人： Joseph Fisher, Jr. ,  Stephen Brian Lynch ,  Robert Caston Curtis

发明人： Joseph Fisher, Jr. ,  Stephen Brian Lynch ,  Robert Caston Curtis

IPC分类号： H02B1/24

CPC分类号： H03M11/02 ,  H01H1/60 ,  H01H3/001 ,  H01H9/167 ,  H01H2239/034 ,  H04M1/7258 ,  Y10T307/74

摘要： Electronic devices may use buttons to gather user input. Button status monitoring circuits may be provided that apply a time-varying bias voltage to each button. The time-varying bias voltage may be held at a fixed non-zero level when the state of the button is being monitored and may be held at a level of zero volts when the state of the button is immaterial and is not being monitored. The reduction of the bias voltage across the button when the button is not being monitored prevents undesired acceleration in dendritic growth when the electronic device is exposed to moisture. The bias voltage may be pulsed by using a control circuit. The control circuit may generate a series of square wave pulses that are applied across the terminals.

摘要翻译： 电子设备可以使用按钮来收集用户输入。 可以提供对每个按钮应用时变偏置电压的按钮状态监视电路。 当按钮的状态被监视时，时变偏置电压可以保持在固定的非零电平，并且当按钮的状态不重要并且不被监视时，可以保持在零电平的电平。 当按钮不被监视时，按钮上的偏置电压的减小防止当电子设备暴露于水分时树突状生长中的不期望的加速。 偏置电压可以通过使用控制电路来脉冲。 控制电路可以产生施加在端子上的一系列方波脉冲。

公开(公告)号：US20120050964A1

公开(公告)日：2012-03-01

申请号：US13094098

申请日：2011-04-26

申请人： Joseph Fisher, JR. ,  Stephen Brian Lynch ,  Robert Caston Curtis

发明人： Joseph Fisher, JR. ,  Stephen Brian Lynch ,  Robert Caston Curtis

IPC分类号： H05K7/00

CPC分类号： H03M11/02 ,  H01H1/60 ,  H01H3/001 ,  H01H9/167 ,  H01H2239/034 ,  H04M1/7258 ,  Y10T307/74

摘要： Electronic devices may use buttons to gather user input. Button status monitoring circuits may be provided that apply a time-varying bias voltage to each button. The time-varying bias voltage may be held at a fixed non-zero level when the state of the button is being monitored and may be held at a level of zero volts when the state of the button is immaterial and is not being monitored. The reduction of the bias voltage across the button when the button is not being monitored prevents undesired acceleration in dendritic growth when the electronic device is exposed to moisture. The bias voltage may be pulsed by using a control circuit. The control circuit may generate a series of square wave pulses that are applied across the terminals.

摘要翻译： 电子设备可以使用按钮来收集用户输入。 可以提供对每个按钮应用时变偏置电压的按钮状态监视电路。 当按钮的状态被监视时，时变偏置电压可以保持在固定的非零电平，并且当按钮的状态不重要并且不被监视时，可以保持在零电平的电平。 当按钮不被监视时，按钮上的偏置电压的减小防止当电子设备暴露于水分时树突状生长中的不期望的加速。 偏置电压可以通过使用控制电路来脉冲。 控制电路可以产生施加在端子上的一系列方波脉冲。