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7453376 |
Method, apparatus, and computer-readable medium for key press determination
A system, method, and computer-readable medium having instructions for determining a key press from a current keyboard state at a current time is described. The system stores signals indicative of...
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7446676 |
Self-scan programmable keypad interface
Various embodiments are disclosed relating to a self-scan programmable keypad interface. In an example embodiment, an apparatus is provided that includes a processor, and a keypad interface...
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7386882 |
Key pad decoder
A system for determining which key of a key-pad device is activated by an algorithm that employs the same number of steps to make the determination regardless of which key is pressed. In one...
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7356626 |
Method and device for signal protection
Method for decreasing the existence of externally detectable revealing signals, so-called {umlaut over (R)}Ö{umlaut over (S)}, from keyboards ( 1 ), e.g. for computers, where the keyboard is fed...
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7218250 |
Method and apparatus for keyboard control with programmable debounce and jog
A method for providing debounce and jog control for a keyboard includes loading a first electronic storage register with a value indicative of a debounce period for the keyboard and loading a...
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7170428 |
Electronic device and method of managing its keyboard
The invention relates to an electronic device and a method of managing a virtual keyboard of the electronic device. The device comprises a touch pad ( 106 ), a processing unit ( 600 ) and a...
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7167107 |
Keypad array having reduced number of input/outputs and method for generating same
The invention concerns a method ( 200 ) of generating an array ( 100, 300, 400 ) having a reduced number of input/outputs ( 114, 314, 414 ). The method includes the steps of, for each array row...
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7091955 |
Multi-purpose keyboard
Methods and apparatuses are disclosed for a keyboard. A removable part of a keyboard includes keyboard keys and stores identification data for indicating software for the particular removable...
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7091953 |
Multi-purpose keyboard
A keyboard for use as an input device for a host computer comprising a removable part that comprises a set of specific of keys each of which having a contact and held by a foundation. The removable...
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7056043 |
Keyboard for a mobile device
An apparatus has a keyboard panel with a QWERTY array of alphabetic key actuation indicia. The apparatus further has a QWERTY array of keys that are free of alphabetic key actuation indicia, and...
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6954134 |
Apparatus and method for timing an output of a remote keyless entry system
A crystal-less keyless entry system includes a microprocessor or micro controller, a timing circuit, and a radio frequency circuit. The timing circuit is a unitary part of the microprocessor. When...
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6947031 |
Data processing apparatus with replacement keyboard
Data processing apparatus ( 101 and 102 ) configured to receive signals from an input sensor ( 106 ) arranged to duplicate or replace operations of a keyboard, in which the signals correspond to...
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6876354 |
Keyboard type input device and portable information processor
A key-board type input mechanism suitable for inputting large quantity of data is provided to a portable information technology device having a pen-input type display device. A keyboard ( 33 or ...
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6781574 |
Apparatus and method for preventing poor operation of key due to chattering noise
An apparatus and method for preventing poor operation of a key due to chattering noise are provided. The apparatus includes a control button section for generating a key signal to control a display...
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6748468 |
Caps lock notification
A Caps Lock notification method, system, mechanism, algorithm, and computer program product. A determination is made as to whether a Caps Lock key of a computer keyboard is in an error state, based...
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6710769 |
Portable computing device that records operator inputs
A computing device includes a keyboard controller that is adapted to convey an operator input from the keyboard controller along a communications channel. Also included is a battery module, which...
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6681347 |
Method for testing keyboard complied with language code
A method for testing a keyboard complied with a language code table comprises the steps of reading an embedded language code of the keyboard to be tested through a central processing unit (CPU),...
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6677931 |
Keyboard
A keyboard with a numbers of keys disposed on the base is capable of showing the three-dimensional characters. Each key includes a shell and a three-dimensional character embedded in the shell....
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6661408 |
Touch screen capable of isolating noise signals
A touch screen capable of isolating noise signals is mainly a touch screen installing at the front side of a liquid crystal display (LCD) screen or cathode ray tube (CRT) for eliminating...
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6567016 |
Typematic guard protocol for wireless keyboards
A wireless keyboard may be provided with a guard protocol which prevents unintended typematics. An alive signal may be periodically generated to advise a host processor-based system that the...
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6441753 |
Multi-function key assembly for an electronic device
An improved multi-function key assembly ( 12 ) is provided. The multi-function key assembly includes a printed circuit board substrate ( 28 ) having a popple dome switch array ( 26 ) mounted...
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6438699 |
Key stroke detection for keyboard remote wake-up
A keyboard is placed into a suspend mode. Upon the detection of the pressing of a key, the keyboard processor is wakened from the suspend mode. No power is consumed during the suspend mode, sine...
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6417787 |
Method and apparatus for increasing the number of keys of a key-matrix
An apparatus and a method for increasing the number of keys in a ready made key-matrix , it is necessary to increase some extra diodes and change the keyboard scanning method . To increase some...
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6298107 |
Narrowband digital cordless telephone with a logic high weak driver and a logic low strong driver for keypad interface
A digital cordless telecommunications unit that serves for communications when paired with a similar unit and connected with a network is disclosed. The unit receives and transmits analog voice...
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6204839 |
Capacitive sensing keyboard and pointing device
A combination keyboard and pointing device is incorporated in a portable computer and includes a dielectric base member on a top side of which a spaced series of electrically conductive pad member...
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6198475 |
Touch operation information output device
A touch operation information output apparatus is provided in a position at which a driver can operate it, and detects a touched position with respect to the input pad and outputs its coordinate...
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6104318 |
Method for entering a special mode of an electric device
A method for entering a special mode of an electric device in which the special mode such as a test mode exists. According to the method, at least two coded keys are continuously inputted. From an...
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6028538 |
Method, keyboard and system for transmitting key characters
A method for transmitting key characters representative of keys on a keyboard is provided. A probability of use for one or more of the key characters may be determined by counting the number of...
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5818451 |
Computer programmed soft keyboard system, method and apparatus having user input displacement
A computer in which entry of data from an area provided on a display, touch screen or the like is accomplished by the provision of a "soft keyboard". Misentry of data is avoided by providing for...
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5783874 |
Keypad handling circuits
A key handling circuit for a switching matrix having row and column conductors includes bidirectional drives for the row conductors and the column conductors. The row drive and the column drive are...
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5734331 |
Input control for radio selective calling receiver
A selective calling receiver includes a keypad for inputting an instruction according to a user's manual operation and a detector for detecting an incoming call addressed to the selective calling...
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5708227 |
Electronic musical instrument
In an electronic musical instrument which generates musical tone signals based on playing information input from a key switch circuit 10, a key scan circuit 11 includes a decode circuit 22 to which...
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5689247 |
Automated system for identifying authorized system users
A method and apparatus for identifying authorized users of a secure system. A user of the secure system is prompted to enter a personal identification code which is then received into the secure...
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5677687 |
Zero DC power keyboard scanner using bidirectional I/O's with repeaters
The present invention is directed to a system and methodology where virtually no DC power dissipation is used during keyboard scanning or key closure. This is done by replacing the passive pull-up...
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5557299 |
Method and apparatus for a learning styled computer keyboard
In one embodiment, the method and related apparatus for configuring and operating a computer keyboard includes providing a personal computer system having a monitor, central processing unit,...
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5552781 |
Fault tolerant method of decoding an electronic key system
A fault tolerant method of decoding an electronic key system includes the steps of reading a key return image from one or more actuated keys and comparing the read key return image to the previous...
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5523755 |
N-key rollover keyboard without diodes
A n-key rollover keyboard having an application specific integrated circuit (ASIC) with a large number of pins, each pin directly connected to a key contact, with the other side of the key contact...
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5521575 |
Key signal input circuit for microcomputer
A key signal input circuit for a microcomputer including a microprocessor and a single input port. The microcomputer outputs, in sequence at a constant interval, a plurality of grid signals,...
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5512893 |
Keypad scanner process and device and cordless telephone employing the mechanism
A keypad scanner mechanism which may be incorporated with an integrated circuit including a microcontroller. The keypad scanner mechanism includes a keypad with more than one key. The keypad...
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5486824 |
Data processor with a hardware keyscan circuit, hardware keyscan circuit, and method therefor
A data processor (50) includes a hardware keyscan circuit (54) to interface to an external keypad matrix (80). In one embodiment, the data processor (50) has a first register (62) for driving data...
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5469159 |
Method capable of judging validity or invalidity of a status of switching elements in a keyboard switch device
A method of detecting the status of a keyboard switch device judges validity or invalidity of the status of switching elements on the basis of simple conditions. With this method, processing of...
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5463386 |
Electrical matrix keyboard scanning circuit
Disclosed is a scanning circuit for an electrical matrix keyboard. The keyboard has extended keys on a voltage line and a ground line. Two extended line detector are incorporated into the circuit...
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5457455 |
Real time keyboard scanner
The REAL TIME KEYBOARD SCANNER shown herein provides scanning and debouncing, but not multiple key resolution or buffering. At the end of each keyboard scan, the scanner produces a code indicating...
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5406273 |
Data processor
A data processing apparatus receives key codes corresponding to keys depressed on a plurality of keyboards. These key codes are sequentially stored in a first-in first-out (FIFO) buffer awaiting...
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5371498 |
Circuit for recognizing key inputs
A circuit for recognizing double key inputs includes a key input part, a key signal generating part, a comparing circuit and a detecting part, the key signal generating part operates simultaneously...
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5315539 |
Method and apparatus for debouncing signals
Debounce and lockout filters include an input part for receiving a plurality of input signals from switches, a microprocessor and an output part. The filters simultaneously process a plurality of...
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5266950 |
Programmable keypad monitor
A keypad monitor implemented in an integrated circuit monitors the closure of a plurality of keypad switches coupled to input terminals of the integrated circuit. The keypad monitor is operative in...
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5264845 |
Key scan circuit and method in a microcomputer system
A key scan circuit and the method thereof in a microcomputer is disclosed which requires no diode for preventing circuit short and performs key check or automatic operations with a simplified...
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5220601 |
Keypad status reporting system
A keypad status reporting system provides an indication over a serial bus as to which switch of a plurality of keypad switches is being selected by an operator wherein each keypad switch is coupled...
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5220323 |
Keyboard apparatus having ghost key sensing function
A keyboard apparatus includes a key matrix having key switches disposed at intersections between rows and columns forming a matrix and a control unit for selecting a row and a column of the key...
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