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    • 5. 发明申请
    • APPARATUS AND METHOD FOR IMPROVING KEY SCAN PERFORMANCE USING INVERTER CIRCUIT IN PORTABLE TERMINAL
    • 使用变频器电路在便携式终端中改进关键扫描性能的装置和方法
    • US20110175757A1
    • 2011-07-21
    • US13006713
    • 2011-01-14
    • Kwang-Min KIL
    • Kwang-Min KIL
    • H03M11/00
    • H03M11/20
    • An apparatus and a method for key scan in a portable terminal, more specifically, an apparatus and a method for enhancing a key scan process which recognizes a user's key press by defining key inputs corresponding to state of a plurality of input signals and allowing a plurality of key scans with a limited number of General Purpose Input/Outputs (GPIOs) are provided. The apparatus includes a controller for setting one or more intervals for a key scan process, for classifying a state of a signal input in each interval as one of a first state and a second state, and for setting one of a plurality of different functions according to the state and the interval of the input signal, and a key input determiner for, when detecting a key input of a user during the key scan process, recognizing one of a plurality of different key inputs according to the state of the input signal, and for determining a function corresponding to the recognized key input. The controller performs the determined function.
    • 一种便携式终端中的按键扫描的装置和方法,更具体地说,一种用于增强按键扫描处理的装置和方法,该方法通过定义与多个输入信号的状态对应的键输入并允许多个 提供了有限数量的通用输入/输出(GPIO)的关键扫描。 该装置包括一个控制器,用于设置用于按键扫描处理的一个或多个间隔,用于将在每个间隔中输入的信号的状态分类为第一状态和第二状态之一,并且用于将多个不同功能中的一个根据 输入信号的状态和间隔;以及键输入确定器,用于在按键扫描处理期间检测用户的键输入时,根据输入信号的状态识别多个不同键输入中的一个, 并且用于确定与所识别的键输入相对应的功能。 控制器执行确定的功能。