System and method for detecting key actuation in a keyboard

    公开(公告)号:US07084787B2

    公开(公告)日:2006-08-01

    申请号:US10367140

    申请日:2003-02-14

    IPC分类号: H03K17/94 H03M11/00

    摘要: A system and method for detecting key actuation in a keyboard assembly, which, in one embodiment, is used as a conductor to electrically communicate with an information appliance. The rows in the keyboard assembly are electrically isolated from one another, and each row contains keys bridging a two-wire bus. Each key has a switch that is closed during key actuation, a diode to polarize the key, and a resistor to provide a resistive load when the switch is closed and the diode is biased with the current flow. Alternatively, each key has a switch that is closed during key actuation, a timer with an output that goes high after a predetermined time period, and a resistor that provides an identifying load when the switch is closed and the output of the timer is high. Other features of the invention include a linear matrix coupled to a row of keys to allow the row to be scanned by sections and individual keys, and a flexible circuit that provides the electrical pathways for the linear matrix.

    Foldable keyboard
    4.
    发明授权
    Foldable keyboard 有权
    可折叠键盘

    公开(公告)号:US06972699B2

    公开(公告)日:2005-12-06

    申请号:US10794255

    申请日:2004-03-05

    IPC分类号: G06F3/02 H03K17/94 H03M11/00

    摘要: A foldable keyboard having a plurality of folding keyboard sections. Each keyboard section includes a frame carrying a key set having a plurality of keys. The key set may be movable laterally relative to the frame. The frame with the key set is foldable with respect to an adjacent frame. The frame provides a self-contained enclosure for the keyboard assembly when fully closed. When opened, the keyboard assembly can be a full-size standard QWERTY keyboard.

    摘要翻译: 一种具有多个折叠键盘部分的可折叠键盘。 每个键盘部分包括承载具有多个键的键组的框架。 键组件可以相对于框架横向移动。 具有键组的框架相对于相邻框架是可折叠的。 当完全关闭时,该框架为键盘组件提供了一个独立的外壳。 打开时,键盘组件可以是全尺寸的标准QWERTY键盘。