Abstract: An information processing method and an electronic device are described. The method is applied to an electronic device. The method includes detecting an operation performed via a keyboard; determining which keys on the keyboard the operation is addressed to, the keys including ordinary keys, a first dedicated key, and a second dedicated key, wherein when the second dedicated key and each of the ordinary keys are simultaneously operated, a predetermined function corresponding to an associated ordinary key is performed, respectively; and when a determination result indicates that the operation includes an operation addressed to the first dedicated key and one of the ordinary keys, a predetermined function executed corresponding to that the second dedicated key and the ordinary key are simultaneously operated is executed.

Abstract: A key input includes a keypad device and a micro controller unit. The keypad device has a matrix consisted of first signals lines, second signal lines, and switches located in corners which are formed by the first and the second signal lines, and a plurality of keys corresponding to the switches. The micro controller unit connects the first signal lines and the second lines and provides a pulse to the first signal line. When the switch is turned on by the key, the pulse is translated from the first signal line to the second signal line. Thus, the pulse is directly detected, so as to achieve the fast scanning and low sensitive impedance of carbon membrane efficient.

Abstract: A system and method for processing keystrokes made while operating a medical device to prevent keypad entry errors. The key press-to-press time is monitored and a subsequent key press rejected if the actual key press-to-press time is shorter than a key press-to-press limit. The actual key inactive time between the release of a key and the subsequent press of a key is compared to an inactive time limit. The subsequent key press is rejected if the actual inactive time is shorter than the inactive time limit. Alerts are provided and further key presses are ignored until the operator presses a CLEAR key. The active time of a key press is monitored and compared to an active time limit. If the actual key press active time exceeds the key press active time limit, an alert is provided but the key press is recognized. An adaptive approach is disclosed in which key presses of an operator are monitored and timing limits modified in accordance with the keying patterns of that operator.

Abstract: A keyboard without ghost keys has a circuit which includes a microprocessor in which a plurality of I/O lines form a keyboard scanning matrix. Two of the I/O lines on the matrix cross to define a plurality of signal switches. The microprocessor is electrically connected to a primary level resistance and a reference potential to determine the ON condition of the signal switches. Each signal switch further is electrically connected to at least one secondary level switch which is electrically connected to the primary level switch in a serial manner. When a user depresses any three signal switches on the rectangular angles of the keyboard scanning matrix, the connecting primary level resistance and the secondary level resistance form a new level resistance. The new level resistance and the current flowing to the keyboard scanning matrix are processed to get a potential smaller than the reference potential, thereby to eliminate the phenomenon of ghost keys.

Abstract: A key-input correcting device comprises a deciding section and a changing section. The deciding section decides whether a key-input using one or more keys or buttons provided to the input unit of an electronic apparatus is valid or not. When the key-input is invalid, the changing section changes the key-input to another key-input.

Abstract: A key-input correcting device comprises a deciding section and a changing section. The deciding section decides whether a key-input using one or more keys or buttons provided to the input unit of an electronic apparatus is valid or not. When the key-input is invalid, the changing section changes the key-input to another key-input.