402results about "Dynamic coding" patented technology

A method of dynamically adjusting a long-press delay time, an electronic device using the method, and a computer-readable medium are provided, wherein the electronic device has a plurality of keys. When a pressed time corresponding to a key of the electronic device exceeds a long-press delay time of the key, the electronic device executes a long-press function corresponding to the key. In the present method, a plurality of key inputs is first received. Then, the long-press delay time of the key is set according to the input rate related to the received key inputs. Thereby, the electronic device can respond appropriately according to the typing speed of a user, so as to offer the user a smooth operating experience.

Key control for a key matrix circuit having a plurality of keys is provided to reduce power consumption in key searching caused by unintended key pressing. In key control on the key matrix circuit having a plurality of rows and columns of keys (key switches) in matrix arrangement, keys are disabled or enabled in row lines or in column lines on the key matrix circuit by any one of the lines through key selection by a key selecting means (opening/closing detection circuit, opening/closing detecting unit, key selection switch, key selecting unit). Following key selection, a control means (control unit) keeps key pressing detection in a standby status for a predetermined time in response to an event of detection of a press of a key included in enabled keys, and resumes the key pressing detection after the passage of the predetermined time.

The invention relates to a keyboard technology in computer peripheral equipment, in particular to a keyboard, which can automatically define and can automatically memorize the mapping relations between the keys and the software identifiable shortcut keys. The invention solves the defects that the operation efficiency of the combination keys and the shortcut keys in the prior art is not high, and the keyboard end can't memorize the mapping relations. Through adding a memory unit at the keyboard end, and through defining a logical unit or automatically defining a module, the invention carries out the definition of the mapping relations between the key scanning codes and the key identifying codes of standard keyboard identifiable by a host computer. Therefore, the automatic defining keyboard of the invention can express a combination of a plurality of keys to the host system with a key, thereby greatly improving the implementation efficiency of the shortcut keys.

The invention discloses a method for detecting a press key. The method comprises the following steps: setting a circuit for detecting the press key; detecting whether the press key is pressed down; carrying out voltage A/D conversion; judging which press key is pressed down concretely; and waiting for the press keys to be pressed down next time. The invention also discloses the circuit for detecting the press key, which comprises a plurality of divider resistances with different resistance values and a singlechip, wherein one end of each divider resistance is respectively and correspondingly connected with one end of each press key; the other ends of a plurality of press keys are earthed; the other ends of a plurality of divider resistances are connected together to form a voltage signal detecting end; the voltage signal detecting end is connected to a power supply after passing through another resistance; and a multiplexed IO port of the singlechip, which serves as both an interrupt input IO port and an A/D conversion input port, is connected to the voltage signal detecting end. The method and the circuit for detecting the press key are characterized by capability of realizing scanning dozens of press keys only by utilizing one or two IO ports of the singlechip and have the advantages of few occupied IO ports of the singlechip, low cost of the singlechip and the like.

A key processing method for use in a computer system having at least one BIOS (basic input output system) and one controller is disclosed. The method comprises the following steps. After a predetermined time period, it is first determined whether a specific hotkey has been pressed. If so, the BIOS acquires identification data of the specific hotkey from the controller and performs a corresponding service.

The invention relates to a method for scanning keyboard, which comprises that: A, based on preset sequence, scanning keyboard one time in one scanning period, and finding the state of button according to scanned button value; B, based on said state, the stored state of last time without vibration, and stored last change state of button, finding the present state without vibration. The invention can avoid occupying lots of MCU resource when finding button state. The invention also provides a relative system.

A system and method for scanning a data-input array (e.g., a keyboard or keypad) using a reduced number of signals is disclosed. Specifically, a switch array is disclosed comprising a plurality of switches and a plurality of input/output (I/O) lines. The switch array is arranged in an N*N matrix. A plurality of N I/O lines is used to scan the matrix. In one embodiment, the switches in the array are arranged in an N*(N−1)/2 configuration. In this configuration, there is no duplication of circuit paths. In another embodiment, the switches in the array are arranged in an N(N−1) configuration. In this configuration, a plurality of diodes are used to identify an activated switch depending upon which of a plurality of signal paths is activated. The plurality of diodes is included to differentiate between pairs of switches that complete the same paths between pairs of I/O lines.

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.

An input apparatus using multidimensional electrodes to define key functions and the encoding method thereof is peculiarized by utilizing N-dimensional electrodes to define the individual key functions, where N is a positive integer number greater than two. The keyboard scan process according to the present invention is to perform the scan on the coordinate electrodes one by one and save the scan codes for making a synthetic determination, so as to identify the key being pressed. The keyboard encoder IC using the keyboard scan process of the present invention is advantageous to the pin number reduction and cost descent.

A keyboard with a simplified structure, which is connected to a main computer having a microcomputer in which a key map is stored therein and which generates first and second scanning signals via respective scan input lines and receives first or second scanning codes via respective scan output lines upon a key on the keyboard being operated. The keyboard includes first and second keyboard frames separated from each other, and a first key matrix assigned to the first keyboard frame and disposed adjacent thereto, for generating the first scanning code in response to the first scanning signal, and a second key matrix assigned to the second keyboard frame and disposed adjacent thereto, for generating the second scanning code in response to the second scanning signal.

The invention discloses a method for confirming leading zero number of binary data. The method comprises the following steps: converting the leading zero number in the binary data into a corresponding number of 1; converting all the data behind the first 1 on the highest order side in the binary data into zero; and then calculating the leading zero number in the binary data by addition. The method adopts a completely different design idea; and the input and output data in each part structure is identical in length, so that the problem that the processing period is uncertain along with the different data length caused by hierarchical design is avoided, and the delay is fixed. The method can be applied in a processor to improve the performance of the processor.

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 matrix but only for the connections in the first array that are detected as having activated keys.

This invention relates to a keyboard matrix unscrambling method based on Boolean process including the following steps: defining flag bits, scanning output lines of the keyboard matrix, enquiring if there is a key pressed, enquiring the key to unscramble flag bits, eliminatiung dithering delay, enquiring the level of which port is changed, enquiring which corresponding input port has output scan level to be analyzed by the corresponding operation key and the set key unscrambles the flag bits, which provides a keyboard matrix scan unscramble mode more quickly and accurately.

The invention discloses a touch scanning circuit, a touch driving circuit and a touch display screen. A third output end outputs a first potential signal and first and second output ends output a second potential signal under the control of an input signal of a shift register module in the touch screening circuit; the first output end outputs the first potential signal and the second and third output ends output the second potential signal under the control of a first clock signal; the second output end outputs the first potential signal and the first and third output ends output the second potential signal under the control of a second clock signal; a signal of a first reference signal end is provided for a scanning signal output end by an output module when a signal of a first input end is the first potential signal, and a signal of a second reference signal end is provided for a scanning signal output end when the signal of the second or third input end is the first potential signal. Through mutual match of the two modules, the touch scanning circuit of a simple structure is realized.

A one-chip microcomputer system of the present invention, includes: a display driving circuit for driving a display device, a scanning circuit for outputting a key scanning signal to scan a keyboard switch; a common pert used for scanning the keyboard switch, and driving the display device; and a controller for controlling parallel processing of scanning the keyboard switch and driving the display device.

The invention discloses a digital keying circuit and keying equipment. The circuit comprises a key rheostatic unit and an analog-digital conversion module, wherein the resistance value of the key rheostatic unit correspondingly changes when any of different keys is correspondingly pressed or multiple keys in different combinations are pressed at the same time; one end of the key rheostatic unit is connected with a power supply, and the other end of the key rheostatic unit is grounded; the analog-digital conversion module is connected with the key rheostatic unit and is used for acquiring the corresponding voltage values corresponding to different resistance values at the connection part, and the corresponding voltage values are used for judging the state of the key. The keying equipment is provided with the digital keying circuit. According to the digital keying circuit, the state of the key is judged by detecting the variation of the voltage value, so that the problem of mistaken detection is effectively avoided. The keying equipment provided by the invention effectively avoids the problem of a Ghost key.

A system for detecting a key with key debounce including a circuit for detecting a key activation; a first counter coupled to the circuit and a clock for testing the key activation for a first user definable number of clock cycles; a key debounce buffer for storing a key index identifying the activated key, if the key activation is valid for the first user definable number of clock cycles; a second counter for testing the identified activated key for a first user definable number of hardware key scan cycles; and a key event buffer for storing a key activation event, if the key activation is valid for the first user definable number of hardware key scan cycles.