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| Number | Title | Issue Date |
| 8164489 | Key scanning circuit In a key scanning circuit, a key input unit has a parallel connection of a plurality of circuits having a series connection of resistors and switches between a power supply input terminal and a key scanning terminal. The resistors connected in parallel have differen... | 04/24/2012 |
| 8049646 | Key input device and key scan method In a key input device, a control section is configured to receives a key return signal as an interrupt signal in a standby mode, to set a normal mode in response to the interrupt signal, and to perform a key scan operation in the normal mode to determine an operated... | 11/01/2011 |
| 8013761 | Switching matrix for an input device The invention relates to a switching matrix for an input device such as a keyboard or a cursor device for the detection of different switching states. According to the invention the switching matrix has a group electrically connected to a microcontroller, with a plu... | 09/06/2011 |
| 7961118 | Method for differentiating hotkeys and computer apparatus thereof A method for differentiating hotkeys includes setting a plurality of hotkeys to correspond to a designated scan code and to correspond to a plurality of different identification codes, respectively, wherein the designated scan code and one identification code corres... | 06/14/2011 |
| 7782231 | Key scan type input device A key scan type input device includes a microcomputer having a plurality of output ports for outputting scan signals and a plurality of input ports for receiving key signals in a scan signal section, a first key matrix having a plurality of system control keys arran... | 08/24/2010 |
| 7714746 | Method and apparatus for keyboard readout A key switch matrix circuit includes key switches arranged in rows and columns, each row having a scan line, each column having a sense line. Each key switch is operable to couple a scan line to a sense line. A scan signal delivery circuit supplies scan signals to t... | 05/11/2010 |
| 7619544 | BIOS password security using modified scan codes A BIOS password security technique includes first logic operable to extract a down scan code from a keyboard input queue, the down scan code having a most significant bit; second logic operable to examine case-related auxiliary information; and third logic operable ... | 11/17/2009 |
| 7612690 | Method and apparatus for scanning a key or button matrix An improved key matrix scanning technique conducts a first pre-scan on a first array of connections in a key matrix to identify any activated keys or buttons associated with the first array. A second sub-scan is conducted on a second array of connections in the key ... | 11/03/2009 |
| 7450031 | Universal mobile keyboard A versatile and mobile keyboard and a highly energy efficient keyboard scanning method are provided. The keyboard may be used with a variety of mobile devices such as PDAs, cellular phones, and tablet PCs, through various interfaces such as an IR, USB, or Bluetoothâ... | 11/11/2008 |
| 7443317 | Input device An input device is provided. An input device includes a plurality of input keys; a voltage setting unit; a switching unit; a detecting unit; and a control unit. When the switching unit selects one of the input keys, the control unit controls the detecting unit to de... | 10/28/2008 |
| 7425904 | Keypad circuit with electrostatic discharge protection A keypad device having a circuit of electrostatic discharge (ESD) protection is disclosed. The circuit has n and m numbers of column conductive lines and row conductive lines formed on the print circuit board wherein at least one column or row conductive line is con... | 09/16/2008 |
| 7423556 | Method and device for key input in mobile terminal A method for inputting characters in a mobile terminal is provided. The method involves the steps of detecting any key pressing event on a key input unit, storing the detected key pressing event and performing an operation corresponding to the key pressing event, de... | 09/09/2008 |
| 7420480 | Methods, systems, and computer program products for iteratively providing feedback via a user interface for multi-character, multi-mode alphanumeric data entry Disclosed are methods, systems, and computer program products for receiving input from a multi-function momentary switch by providing feedback from a user interface for each function associated with the switch. According to one method, alphanumeric input values are ... | 09/02/2008 |
| 7420479 | Universal keyboard controller data protocol A keyboard system which includes a keyboard assembly and an embedded controller. The keyboard assembly includes a keyboard matrix and a keyscan controller coupled to the keyscan matrix. The keyscan controller receives position information from a pressed key of the k... | 09/02/2008 |
| 7417565 | Keyboard for hand-held devices A hand-held electronic device has a keyboard with a plurality of keys, each key having a substantially flat contact surface extending to the sides of each key. One of the sides of the key is beveled. ... | 08/26/2008 |
| 7417566 | Sequential two-key system to input keyboard characters and many alphabets on small keypads This invention discloses a sequential two-key system to input letters of the English alphabet and of many world languages, numbers, punctuation marks, page-control characters, line-control characters, cursor-control characters and many other symbols on keypads with ... | 08/26/2008 |
| 7403188 | Handheld electronic device with text disambiquation employing advanced word frequency learning feature A handheld electronic device includes a reduced QWERTY keyboard and is enabled with disambiguation software. An enhanced word frequency learning feature is provided. The device provides output in the form of a default output and a number of variants. The output is b... | 07/22/2008 |
| 7391343 | Input device An input device includes an input circuit including a plurality of key switches connected in parallel to one another, and a control circuit including a key input terminal to which a first terminal of the input circuit is connected, and an interrupt terminal to which... | 06/24/2008 |
| 7388520 | Apparatus and method for decoding a key press Disclosed is an apparatus for decoding a key press. The apparatus includes an interface that performs conversion between parallel data and serial data and generates an interrupt when a key is pressed. The interface includes an output port, an input port, and a regis... | 06/17/2008 |
| 7389454 | Error detection in user input device using general purpose input-output A method and apparatus are disclosed for using a general purpose input-output (GPIO) interface to test a user input device such as a wireless keyboard or mouse. Operation of key-scan logic can be tested by the GPIO interface by temporarily disconnecting the outputs ... | 06/17/2008 |
| 7388536 | Remote control unit, electronic device and method for controlling electronic device A remote control unit, an electronic device and a method for controlling an electronic device using the same are provided. The remote control unit includes: a key input part including a menu key for allowing an electronic device to enter a setup mode, a numeric key ... | 06/17/2008 |
| 7379394 | System and method for modifying button functionality An electronic device comprising a first pusher located in a first position on the electronic device, wherein actuation of the first pusher causes initiation of a first operational sequence; a second pusher located in a second position on the electronic device, where... | 05/27/2008 |
| 7375655 | Keyboard without ghost keys 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 conne... | 05/20/2008 |
| 7369063 | Encoder signal processing circuit including a direction determining/counting unit An encoder signal processing circuit includes: a plurality of detectors adapted to generate signals with different phases; a switching circuit adapted to alternatively select and output a signal from the detectors; and a waveform shaping circuit adapted to shape wav... | 05/06/2008 |
| 7363063 | Mobile wireless communications device with reduced interference from the keyboard into the radio receiver A mobile wireless communications device includes a housing and circuit board carried by the housing. Radio frequency (RF) circuitry carried by the circuit board forms a transmitter and receiver. A processor is carried by the circuit board and operative with the RF c... | 04/22/2008 |
| 7362243 | Apparatus and method using color-coded or pattern-coded keys in two-key input per character text entry Letters (more generally, language symbols) are entered electronically by selecting, in sequential fashion, two keys on a standard phone layout. The first key in the two-key sequence is that key on which the desired letter is displayed. The keys and the letters displ... | 04/22/2008 |
| 7362973 | Protecting secret data entry from infrared and audio eavesdropping A method for protecting a data entry device from eavesdropping includes masking a signature of entry resulting from entry of data by a user of the data entry device so as to reduce the detectability of the signature by eavesdropping. The signature may include a temp... | 04/22/2008 |
| 7362244 | User programmable input apparatus with a keyboard A user programmable input apparatus with a keyboard comprises several keys with one or more special keys thereof on the keyboard for input operations, a microprocessor to receive inputs from the keys when they are pressed, a nonvolatile memory programmable by operat... | 04/22/2008 |
| 7358871 | Method and system for decoding data A system and method for decoding a received data stream is disclosed. The method includes detecting first and second data transitions of a received data stream. Each of the data transitions is of a first transition type (e.g. rising or falling transition). The time ... | 04/15/2008 |
| 7356626 | Method and device for signal protection Method for decreasing the existence of externally detectable revealing signals, so-called {umlaut over (R)}ÖS, from keyboards (1), e.g. for computers, where the keyboard is fed with signals, so-called matrix signals, which are detected for detection of activ... | 04/08/2008 |
| 7356334 | Method and wireless terminal for remote-controlling audio reproducing apparatus A method for remote-controlling an operation of an audio reproducing apparatus using a wireless terminal that is equipped with a display device includes establishing wireless connection between the wireless terminal and the audio reproducing apparatus, sending an au... | 04/08/2008 |
| 7352363 | Single finger or thumb method for text entry via a keypad A single press method for entering text using a keypad is disclosed. A conventional four-row by three-column 12-key keypad is used to enter all of the letters of the alphabet using single key actuation. Depending on the letter, either a single key or multiple side-b... | 04/01/2008 |
| 7345598 | Electronic device with keyboard system and method of detecting key conditions thereof The present invention provides an electronic device and its keyboard system that includes a plurality of keys, a keyboard matrix and a program. The keys include a plurality of first type keys and a plurality of second type keys; the keyboard matrix includes a plural... | 03/18/2008 |
| 7339499 | Keypad signal input apparatus Keypad apparatus for registering signals corresponding to data that a user enters by pressure on keys of an array in a surface extending in two dimensions. The elements of first and second sets of impedance elements (R) are connected in series through respective int... | 03/04/2008 |
| 7336206 | Input key and input apparatus An object of the present invention is to provide an input apparatus and input key capable of reducing the number of operations on the input key for input of symbols and permitting a user to designate a symbol to be inputted, by a simpler operation. An input key 1... | 02/26/2008 |
| 7330135 | Method and a device for reading out keyboard keys A method and a device for reading out keys of a keyboard. The read-out is realised by randomly generating a scanning pattern comprising for each row and column a read-out value to be applied on the rows and columns. The scanning pattern is preferably changed after h... | 02/12/2008 |
| 7330134 | Key construction method for a keyboard and the keyboard thereof A key constructing method for a keyboard has M scan lines*N return lines. The electrical interconnects of the M scan lines*N return lines can generate numerical electrical contacts of A1 to AM*N, while the numerical electrical contacts of {A | 02/12/2008 |
| 7324021 | Input device An input device includes a plurality of input keys arranged in a matrix of three or more rows and three or more columns; electrodes facing parts of or all surfaces of the input keys that surround intersection of rows and columns formed by the arrangement of the inpu... | 01/29/2008 |
| 7323795 | Apparatus for powering on by pushing random key An apparatus for powering on a terminal with a keypad by randomly selecting any key of the keypad. The keypad includes a plurality of keys, each of which has at least one set of contacts. The apparatus comprises a device controlled in such a manner as to be enabled ... | 01/29/2008 |
| 7319743 | Method for enabling a user interface for a network telephone According to the present invention, methods, data structures, and computer-readable media for processing input to a telephone having an interactive user interlace are disclosed. A telephone user inputs commands through buttons and keys on an interactive user interfa... | 01/15/2008 |
