79results about "Device coding details" patented technology

Keyboards, keypads and other data entry devices can suffer from a keying ambiguity problem. In a small keyboard, for example, a user's finger is likely to overlap from a desired key to onto adjacent ones. An iterative method of removing keying ambiguity from a keyboard comprising an array of capacitive keys involves measuring a signal strength associated with each key in the array, comparing the measured signal strengths to find a maximum, determining that the key having the maximum signal strength is the unique user-selected key, and maintaining that selection until either the initially selected key's signal strength drops below some threshold level or a second key's signal strength exceeds the first key's signal strength.

A versatile keyboard input and output device is described. The keyboard device includes a housing having a plurality of buttons, with each button individually clickable, and a capacitive sensing element under each button for touch sensing. The versatile keyboard input and output device further includes a lighting element under each button to provide selective lighting for each button, and a plurality of button glyphs for the plurality of buttons respectively, wherein the button glyphs are selectively visually changeable. The keyboard input device also includes a haptic feedback mechanism included in the housing for providing haptic feedback for the plurality of buttons.

An input apparatus has an input unit for receiving a pressure input, a load detection unit for detecting a pressure load on the input unit, a vibration unit for vibrating the input unit, and a control unit for controlling drive of the vibration unit such that a click sensation is provided to an object pressing the input unit when the pressure load detected by the load detection unit satisfies a predetermined standard for receiving an input to the input unit. Thereby, a realistic click sensation similar to that obtained when a push-button switch is operated is provided upon operation of the input unit of a pressure type by an operator.

A capacitive input pad is provided at a position near input keys constituting a keyboard input unit. A left palm detecting unit and a right palm detecting unit are provided both sides of this input pad. When the left palm detecting unit and the right palm detecting unit detect both palms, an input operation, corresponding to a space key input area, an L-key input portion, or an R-key input portion, is performed through an operation of the input pad. When the left palm detecting unit and the right palm detecting unit do not detect both palms, a coordinate input operation is performed using the input pad.

This invention relates to a multi-tap and combinational alphanumeric data entry on a 12 key device. The [1] key on is labeled with the “.QZ”. Numbers are produced by activating ten numbered keys. Activating the [#] key backspaces. Activating the [*] key one or more times enters an alphabet mode. Activating [1]-[9] keys once produces left data, twice produces middle data and three times produces right data. Activating the [1] then [*] keys produces the “-” dash. Alternatively, simultaneously activating [1]-[9] keys and a left [*] key produces left data, simultaneously activating [1]-[9] keys and a middle [0] key produces middle data and simultaneously activating [1]-[9] keys and a right [#] key produces right data. Activating the [#] key enters a data character for the next data entry on the same previously activated key. Activating the [*] key, after entering a data character, produces the shift function. Activating the [*] key twice produces the backspace function. Activating the [0] key produces a space. Activating the [0] key twice produces a Tab or Enter function. Activating the [#] key twice re-enters the number mode. Activating the [#] and [*] keys enters a first punctuation / symbol mode, where activating [1]-[9] or [0] keys produces left data. Activating the [#] and [*] keys and the [*] again enters a second punctuation / symbol mode, where activating [1]-[9] or [0] keys produces middle data. Activating the [#] and [*] keys and the [*] two more times enters a third punctuation / symbol mode, where activating [1]-[9] or [0] keys produces right data. The alphabetic mode is automatically re-entered into after the punctuation mark or symbol is produced. An entered punctuation mark is followed by a space. Activating the [*] key after the punctuation mark and space is produced, deletes the space after the punctuation mark. Activating the [0] key after a period and space is produced, deletes the space after the period. Simultaneous two key entry increases data input speed by reducing the amount of entries required.

A marine throttle mounted stereo control system consisting of a throttle mounting base having a control shaft pivotally mounted to the mounting base, which is mounted adjacent an operators seat within a boat cockpit. The throttle control has a stereo control which is remotely located from the boats stereo audio system.

An apparatus and method is disclosed for providing a fast, low power consumption, detection of at least one depressed key in a resistive matrix keyboard. The common contact of each row of a resistive matrix is connected to a first input of each of a plurality of analog / digital comparators capable of switching between high and low voltage states. A common predetermined reference voltage is applied to a second input of each analog / digital comparator using a digital to analog converter. The output of a analog / digital comparator is in a first state if the voltage level applied to the first input is higher than the reference voltage, and in a second state if the voltage level applied to the first input is lower than the reference voltage. The reference voltage is varied to identify which analog / digital comparator has experienced a change of state.

A touchpad includes a controller connected to a touch sensor. The controller detects the fingers touching on the touch sensor to determine to start up and terminate a scroll bar control function. In the scroll bar control function, the movement of the finger or fingers touching on the touch sensor is detected for scrolling on a window, and the vertical distance and the horizontal distance of the movement are evaluated for determining the scrolling amount of a vertical scroll bar or a horizontal scroll bar of the window.

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 plurality of keyboard positions. By scanning the keyboard positions, a character or a command typed by a user can be obtained; the program includes a first program code for setting the keyboard matrix to cause a portion of the matrix positions to correspond to the plurality of first type keys, wherein each matrix position corresponding to one first type key, and a second program code for setting another portion of the matrix positions corresponding to the plurality of second type keys, wherein each matrix position corresponding to more than one second type keys.

The invention provides a method and a device for detecting key input, relates to the field of key input detection, and aims to solve the technical problem of instable key output signal due to jitter of a key. The method comprises the following steps: sampling the key input state once per sampling period to generate key input states of three adjacent sampling periods, namely Kinput (n), Kinput (n-1) and Kinput (n-2) respectively; and considering the key output state Koutput (n) of the current sampling period to be no key output when no key is pressed down in at least two of the Kinput (n), Kinput (n-1) and Kinput (n-2) states. The method is easy to implement.

The invention belongs to the field of single chip control and provides a key identifying circuit, a key identifying method and an STB (Set Top Box). The key identifying circuit comprises N ports, at least N diodes and at least N and at most N*(N-1) keys, wherein N*N intersection points are formed by the lines of the N ports and N row lines vertical to the lines; at least one diode is placed at the intersection points in each row; at most one key is placed at a free intersection point without the diode, and one end of the key is connected with the line of the key while the other end is connected with the row line of the key; and a control end of the key is supplied to a user for selecting and controlling. In the key identifying circuit provided by the invention, diodes are used for separating keys and less ports are used for identifying more keys, so that the single chip with less resource is selected, the cost of the single chip is lowered, the size of the corresponding PCB (Printed Circuit Board) is reduced and the cost of the whole device is saved.

An input device includes an array of keys and an illumination system. Each key comprises a key face that is configured for transmission of light. The illumination system includes a light guide disposed below the keys, a plurality of lamps mounted to the light guide, and a lamp controller electrically coupled to the lamps. The light guide is configured to illuminate the key faces via the lamps. The lamp controller is configured to repeatedly illuminate the lamps each for a respective on-time interval of a common illumination period. The location of the lamps and the illumination period and each said on-time interval are selected for the visual appearance of continuous substantially uniform illumination of the array of keys.

The invention discloses a key detecting device and method. The key detecting device comprises a reference voltage module, a voltage comparison module, a voltage analog-to-digital conversion module and a processing module, wherein the reference voltage module is connected with the voltage comparison module and the processing module, the voltage comparison module is connected with the processing module, and the voltage analog-to-digital conversion module is connected with the processing module. According to the key detecting device and method, a part of keys which do not respond can be shielded by setting the reference voltage, the number of the part of keys which do not respond can be controlled, in this way, misoperation on keys is avoided, and resources and power consumed for reading and handling the part of keys are avoided.

The invention provides a key collection circuit, which comprises a plurality of key branches which are mutually connected in parallel, a public resistor and a control chip, wherein each key branch comprises a key and a branch resistor; a user opens and closes the key to realize functional selection; the resistance values of the branch resistors of different key branches are different, and each branch resistor is connected with the related key in series; the public resistor is connected with the key branches for series connecting allotting; and the control chip collects electric potential between the public resistor and the key branches, judges the type of the key according to the collected electric potential, and executes the corresponding functions of the keys. The key collection circuit has the advantages of low cost and good flexibility.

A pulsed dynamic logic environment metric measurement circuit provides self-referenced, low area / cost and low power measurement of circuit environment metrics, such as supply voltage. A cascade of dynamic logic stages is clocked with a pulse having a width substantially independent of an environment metric to which the delay of the dynamic logic stages is sensitive. The number of dynamic logic stages that evaluate within a given pulse provides a direct measure of the pulse width, and thus the value of the circuit metric. The pulse may be generated from a logical exclusive-OR combination of a clock signal provided from two circuit paths that differ in sensitivity to the environment metric to be measured. One circuit path may have a delay substantially determined only by wire delay, which is not substantially sensitive to circuit environment metrics such as power supply voltage.

An authentication device or other type of low-power hand-held device comprises a processor, an external button alternately configurable in an unpressed state and a pressed state, and current drain mitigation circuitry coupled to the external button and a corresponding input of the processor. The current drain mitigation circuitry is configured to connect the input of the processor to a first potential when the external button is in the unpressed state and to connect the input of the processor to a second potential different than the first potential when the external button is in the pressed state, thereby limiting current drain arising from the external button being stuck in the pressed state.

The invention relates to a key circuit and a using method thereof, a TV key panel and a display device. The key circuit includes a first sampling end, a second sampling end and a common end and also includes at least one key branch circuit connected between the first sampling end and the common end, at least one key branch circuit connected between the second sampling end and the common end and at least one key branch circuit connected between a first node and the common end. The first node is connected with the first sampling end through a first on-off element. The first node is connected with the second sampling end through a second on-off element. The first on-off element and the second on-off element can both switch between a conduction state and a break-off state under external control. The invention solves a problem that main board key circuits from different manufacturers cannot be compatible to each other, so that a main board design with compatibility of different types is realized. Working procedure simplification and cost reduction are facilitated.

A method for correcting typing errors according to character layout positions on a keyboard which consists of depressing responsive touch panels to do character entry to correct typing errors caused by mistakenly hitting a neighboring key of a targeted character due to a swerved typing position includes at least the steps of: (1) corresponding a character; (2) calculating a swerved amount; (3) selecting a prepared character; (4) determining whether input is finished; (5) judging rules; (6) getting the prepared character; and (7) switching the character. Through this method input accuracy can be improved and input characters can be automatically amended as desired.

Provided is an apparatus for inputting a character which enables users to input characters more conveniently by arranging input keys having 3 or 4 input interfaces appropriately in a keypad. If the present invention is applied to small sized electronic equipment such as a mobile phone and PDA, much more various types of characters can be arranged as compared with the space the input keys take, and thereby it becomes possible to input characters faster with the minimum amount of effort.

The invention discloses an absolute value coder, which comprises a casing, a spindle arranged in the casing, a main body sleeved on the outer side of the spindle, a code disc base and a metal code disc. A bearing is arranged between the spindle and the main body, a slit assembly is further arranged on the outer side of the spindle, the slit assembly comprises a metal slit sheet, a light-emitting tube printed board and a connecting board for connecting the metal slit sheet and the light-emitting tube printed board, the main body is made of glass-reinforced plastic insulation materials, and the casing and the connecting board are both made of acrylonitrile butadiene styrene (ABS) and glass fiber materials. The absolute value coder is convenient to assemble, high in accuracy, capable of avoiding electric leakage and safe to use.

The invention provides a touch type key and a detection method therefor. The touch type key comprises a touch key module, a partial pressure transmission module, and a processing module, wherein the partial pressure transmission module comprises three end nodes including an end node 1, an end node 2 and an end node 3; the processing module comprises three end nodes including an end node P1, an end node P2, and a grounding end node; the end node P1 and the end node P2 of the processing module are connected with the end node 1 and the end node 2 of the partial pressure transmission module respectively, and the grounding end node of the processing module is grounded; and the touch key module has one end node 4 connected with the end node 3 of the partial pressure transmission module. The touch type key provided by the invention is realized through a most basic component, and has the advantages of low cost, strong anti-interference ability, simple peripheral circuit, good use easiness, simplicity in operation, and long service cycle.

The invention discloses a key switch buffeting elimination circuit used for a GPIO interface. The buffeting elimination circuit comprises a charge circuit, a discharge circuit and a capacitor. When akey switch is in an un-pressed state, the discharge circuit is in an off state, and the charge circuit charges the capacitor; when the key switch is in a pressed state, the discharge circuit signallydischarges electric quantity of the capacitor through the key switch, and the charge circuit is bypassed to the signal through the key switch; besides, the buffeting elimination circuit further comprises a buffer which is used as a reshaping circuit, and the buffer is used for reshaping voltage waveforms at the two ends of the capacitor, and therefore, the GPIO interface obtains a switch signal with good waveform quality. The buffeting elimination treatment disclosed by the invention does not need to occupy processor or controller resources, and the buffeting elimination circuit is simple in structure, is stable and reliable in work, and has a very good buffeting elimination effect.

The invention discloses a two-way acquisition and verification physical key. The two-way redundancy design is realized through the steps S1 and S2; in the step S3-1 and S3-2, inconsistent faults of the first acquisition circuit and the second acquisition circuit are detected, so that the error influence of the inconsistent faults on a key state variable of a key output electric signal is avoided,and the reliability of a physical key is improved; in the step S4-1 and S4-2, the electric signal faults of the first and second acquisition circuits are detected, so that the error influence of the electric signal faults on the key state variable of the key output electric signal is avoided, and the reliability of the physical key is improved; in the step S5-1 and S5-2, the adhesion faults of thefirst acquisition circuit and the second acquisition circuit are detected, so that the error influence of the adhesion faults on the key state variable of the key output electric signal is avoided, and the reliability of the physical key is improved. Therefore, the possible fault condition of the physical key is overcome, the reliability of the physical key can be greatly improved, and the smoothrealization of the key operation intention of a user is ensured.

A multi-interface selection method based on a keyboard scan and display driving chip includes the steps: a, dividing intersections of an NXN array into n key positions and m jumper wire positions, enabling the m jumper wire positions to form a plurality of jumper wire position state combinations by selecting short connecting circuit lines, writing corresponding interfaces and functional subprograms according to functional requirements of a series of machine types adopting an MCU (microprogrammed control unit), and enabling the subprograms to be in one-to-one correspondence to the jumper wire position state combinations to be stored in a storage of a master control board; and b, obtaining key numbers on a PCB (printed circuit board) and binary values of jumper wire position state combinations by means of keyboard scan after an operating panel PCB of one machine type of a series of machine types is connected with the master control board through a communication interface, and utilizing the MCU to invoke the corresponding interface and subprograms according to the binary values and to switch to the corresponding interfaces, so that functional operation of the corresponding keys is completed. The universal master control board is employed, only one-time programming is needed, development of a novel machine type is facilitated, the method is suitable for batch production, and debugging and after-sale maintenance are facilitated.

An apparatus and method therefor wherein instead of applying a high bias voltage 100 per cent of the time to leads susceptible to dendrite formation, the bias voltage is switched from a low bias voltage to a high voltage bias mode when the leads (19) are to be read or scanned by a microprocessor (14), and the bias voltage is then switched back to a low bias voltage mode when the lines are not being read, e.g., at other times, thereby greatly reducing the high bias “on” time and dramatically reducing the probability of dendrite formation. The reduction of high bias voltage “on” time is accomplished by programming the microprocessor (14) to switch the applicable input ports (16) to be output ports when the leads (19) are not to be read. As output ports, the output impedance and output voltage of the microprocessor are low as opposed to a high input impedance when the terminals are input terminals. When the leads are configured as output leads, the voltage division of the microprocessor low output impedance, in combination with a large valued pull-up resistor (12) which provides the high bias voltage when the leads are input leads, makes the voltage bias on the leads low, thus greatly reducing the probability of dendrite formation.

The invention provides a key setting method, which is used for setting a plurality of keys of a keyboard of an ADC (analog-to-digital converter), and includes the following steps: respectively conforming a plurality of dividing voltages corresponding to the keys through a processing unit as per a plurality of voltage variation ranges corresponding to the keys; and calculating a plurality of resistance values of a dividing voltage model at least as per the dividing voltage, wherein the dividing voltage model is provided with the dividing voltage set respectively corresponding to the key. In the method for setting the keys of the ADC, provided by the invention, the processing unit is used for setting the corresponding voltage variation range when the key is pressed down, so that each voltage variation range is not overlapped with the voltage variation ranges of other keys, as a result, the ADC can be used for converting the different simulated voltage signals into different digital output signals, and the processing unit can be used for correctly recognizing the key pressed down through detecting the digital output signal.