23results about "Dynamic coding" patented technology

The invention relates to a non-blocking type key detection method and system and a medium. The non-blocking type key detection method comprises the following steps that a GPIO pin clock connected with a key is enabled, and an input mode of a GPIO pin is configured; timed interruption triggering periodically scans the level of a GPIO pin, a state machine identifies the physical state of a key and sets a key event flag through the level of the GPIO pin under a timing mechanism of progressive decrease timing, and the event flag is updated to a global event flag variable through atomic operation of an event interface to be read by an external application program; the invention further discloses a system and a medium according to the method. According to the invention, efficient and reliable multifunctional key identification is realized, and the method has the advantages of jitter resistance, low CPU occupation and high real-time performance.

The present application relates to the technical field of keys, and discloses a key detection system, a device, a method, and a storage medium. The key detection system in the present application comprises keys, a drive circuit (10), and a detection circuit (20); each key comprises a base (1) and a moving assembly (2); the moving assembly (2) passes through the top surface of the base (1), and the moving assembly (2) moves back and forth perpendicularly to the top surface; the moving assembly (2) comprises a core shaft (21) and conductor plates (22) fixed relative to the core shaft (21); the base (1) comprises a bottom seat (11), and a primary electrode plate (12) and a secondary electrode plate (13) which are fixed relative to the bottom seat (11); the conductor plates (22) are respectively arranged opposite to the primary electrode plate (12) and the secondary electrode plate (13); the drive circuit (10) is connected to the secondary electrode plate (13), and the detection circuit (20) is connected to the primary electrode plate (12); the drive circuit (10) drives the secondary electrode plate (13) to work. Thus, the accuracy of key displacement detection is improved.

The utility model discloses a button signal identification circuit based on triode control, which relates to the field of button signal identification, and is characterized in that each button is associated with a voltage dividing unit through a corresponding triode, and the triode controls the corresponding voltage dividing unit to work according to the state of the button, so that when the button is pressed down, the voltage dividing unit can be adjusted according to the state of the button. The corresponding voltage dividing unit can generate and output a voltage signal corresponding to the key; that is to say, the key does not directly participate in the voltage division loop, but indirectly influences the voltage output in the circuit by controlling the conduction state of the triode, so that the state identification of the key does not depend on the contact impedance between the golden finger and the conductive rubber any more, and the condition that the key cannot be damaged even under the condition that the fluctuation of the contact impedance is large is ensured. And the circuit can accurately identify the key state without generating false triggering.

The application belongs to the technical field of touch key detection, and particularly relates to a disc type pulley touch detection method applied to an FPC flexible circuit board. The method comprises the following steps: obtaining a touch maximum value, a touch intermediate value and a touch minimum value of each key through register initialization and double-frequency hopping touch scanning; taking the difference between the touch maximum value and the touch minimum value as a noise value of each key; comparing the noise value according to a preset noise judgment condition to judge whether the touch detection system is currently in a noise environment, and setting or clearing a noise flag bit accordingly; selecting the touch intermediate value or the touch minimum value as a current effective touch value according to the noise flag bit; and slowly updating touch reference values of the keys in a weighted manner under the condition that there is no effective touch and touch change is stable. The application solves the problems of unstable key pressing and sensitivity deviation of a touch pulley system.

The utility model discloses a key scanning circuit, which can respond to all pressing operations of a key module through an Lth scanning signal output by a signal acquisition and processing module, and also outputs an Mth scanning signal to detect a Kth key signal in the key module again. The detection scanning frequency of part of the keys in the key module is improved, and the detection scanning frequency of the Kth key signal is improved on the premise that the detection scanning frequency of the whole keys is not changed, so that the implementation cost is reduced.

The invention discloses a serial-parallel dual-channel hot standby magnetic induction integrated circuit chip with an address code, which contains a GRB lamp bead and integrates a magnetic induction circuit, a GRB magical color drive circuit, an address code memory and a serial-parallel single-bus serial communication circuit. The address code input pins and the address code output pins of the n magnetic induction integrated circuit chips are cascaded front and back to form a series data line network, and a sequence formed by cascading the magnetic induction integrated circuit chips is written into the address code memory; the power pins are connected in parallel to share a power network, the grounding pins are connected in parallel to share a ground network, and the parallel data line pins are connected in parallel to form a parallel data line network; and the serial-parallel unibus serial communication circuit is used for processing serial data line network information and parallel data line network information. According to the series-parallel hybrid transmission circuit with the redundant path, address code writing of the series link is simple and efficient, a special jig is not needed, and the series link and the parallel link are hot standby for each other.

A keyboard backlight circuit integrated with a key detection function, a keyboard backlight circuit driving method, and a key input apparatus. The keyboard backlight circuit comprises a plurality of scanning lines (10) and a plurality of output lines (11); each scanning line (10) has a main line (102) and a plurality of branch lines (103) connected in parallel with the main line (102), the main line (102) having first voltage terminals (100), and each branch line (103) having a second voltage terminal (101); a light-emitting diode (D1-D9) and a first resistor (R1-R9) connected in series are arranged in sequence between each second voltage terminal (101) and a connection position of each branch line (103) with the main line (102), the light-emitting diodes (D1-D9) causing a current to be unidirectionally conducted towards the first resistors (R1-R9); each output line (11) has a voltage output terminal (110), and a plurality of switch circuits (12) connected to the plurality of scan lines (10), respectively, the switch circuits (12) being connected to portions of the scan lines (10) located between the light-emitting diodes (D1-D9) and the first resistors (R1-R9), and each switch circuit (12) comprising a key switch (SW1-SW9). By means of arranging the switch circuits (12) in series in the keyboard backlight circuit, the functions of key detection and anti-ghosting can be implemented while achieving a keyboard backlight effect.

The utility model discloses a circuit capable of randomly combining keys and displaying and a displayable device, which belong to the technical field of display circuit control, and are characterized in that a micro-control chip is adopted to control two groups of chip selection chips, and the chip selection chips comprise a first chip selection chip and a second chip selection chip; a first chip selection chip is adopted to control a display driving chip, and the display driving chip is controlled to read and write display content; a second chip selection chip is adopted to control the key scanning chip, the key scanning chip is controlled and locked, and the key scanning chip is controlled to read the value of the key in the next CLK clock period; an additional key scanning chip and a display driving chip are added. Through a special connection mode, when the first chip selection chip controls the chip selection display driving chip, the key state is locked at the moment, then the key scanning chip can read the value of the key in the next CLK clock period, and combination of any keys can be achieved through the method.

The application discloses a keyboard scanning circuit, a keyboard key recognition method, a chip and a keyboard. The keyboard scanning circuit comprises: a key value detection circuit connected with a keyboard scanning input interface and used for collecting a first level state corresponding to the keyboard scanning input interface; a state machine jump circuit used for outputting a current keyboard state; and an output decoding circuit connected with the key value detection circuit, the state machine jump circuit and a keyboard scanning output interface, used for controlling the keyboard scanning output interface to perform key scanning when the current keyboard state is an idle state and the first level state jumps from a high level to a low level; the key value detection circuit is further used for collecting a second level state corresponding to the keyboard scanning input interface after the keyboard scanning output interface is controlled to perform key scanning; and the output decoding circuit is further used for performing key recognition according to the second level state. The keyboard scanning circuit can realize key scanning and key recognition, has high reliability and does not need to additionally occupy keyboard MCU operation resources.

This application provides a pressing key detection system, device, method, and storage medium. The system includes at least one key, a driving circuit, and a detection circuit. Each key includes a base and a movement assembly. The movement assembly extends through a top surface of the base and reciprocates perpendicular to the top surface. The movement assembly includes a core shaft, and two conductor plates fixed relative to the core shaft. The base includes a casing, and a main electrode plate and a secondary electrode plate fixed opposite to the casing. The two conductor plates are respectively arranged opposite to the main electrode plate and the secondary electrode plate. The driving circuit is connected to the secondary electrode plate, and the detection circuit is connected to the main electrode plate. The driving circuit drives the secondary electrode plate to operate. This key arrangement improves accuracy of key displacement detection.

A key switch device includes: a key that is configured to output a signal corresponding to a pressing amount; a pressing amount detector that is configured to detect the pressing amount of the key; an A / D converter that is configured to convert the pressing amount of the key into digital data; and a RAM that is configured to store multiple operating points for switching between ON and OFF states of the key according to the digital data. In addition, the key switch device includes an output signal control unit that is configured to output an ON signal when the pressing amount exceeds any one of the operating points in a direction in which the pressing amount of the key increases, and to output an OFF signal when the pressing amount falls below any one of the operating points in a direction in which the pressing amount of the key decreases.

The present disclosure provides a kind of analog key scanning system and method, wherein the system includes: the key matrix consisting of multiple analog key sensors;At least one analog switch, its multiple input terminals are respectively connected to the sensor output terminal of different column in key matrix, and its output terminal is connected to the input terminal of analog-digital converter (ADC) channel;Control unit is configured to control the power supply for different row sensors in key matrix in turn;During the power supply of each row, control at least one analog switch, to select the sensor of each column connected to the row to ADC channel in turn by analog switch;The sensor output selected by analog switch is continuously sampled by ADC channel.This disclosure realizes high-speed pipeline scanning and low power consumption by power supply in turn, and the hardware cost is greatly reduced by multiplexing acquisition of multiple column signals through a single ADC channel, thereby providing a key technical foundation for high reporting rate and accurate intensity detection of game keyboard.

The invention relates to the technical field of key scanning, and discloses a matrix key detection method and device, electrical equipment and a storage medium, and the method comprises the steps: creating a first two-dimensional array, enabling a first dimension in the first two-dimensional array to represent all to-be-scanned keys in the matrix keys, and enabling the first dimension in the first two-dimensional array to represent the to-be-scanned keys in the matrix keys; the second dimension is used for storing a set of state sampling values determined after multiple times of continuous scanning of the keys, then scanning the matrix keys based on a preset time interval, and storing the state sampling values of the keys obtained by each time of scanning into a first two-dimensional array according to a scanning time sequence; and finally, on the basis of the state sampling value set of each key stored in the first two-dimensional array, the pressing state of the key can be determined, the influence of instantaneous interference on a single scanning result is avoided, and by carrying out statistical analysis on sampling values obtained by multiple times of scanning, the misjudgment rate is greatly reduced, and the accuracy and reliability of key judgment are improved.

The application provides a kind of multi-mode input matrix scanning method and system based on hardware acceleration, it is related to electronic equipment input processing technical field, this method is integrated to single circuit by time-sharing multiplexing hardware matrix to keyboard, encoder and button contact;Hardware scanning engine is constructed by utilizing timer triggering double DMA channel, realizes the automatic column selection and row state reading without CPU intervention, and scanning frequency can reach more than 900Hz;In software processing, enhanced encoder state verification algorithm is used, by maintaining B signal change counter and logically verifying A phase change, signal jitter and burr are effectively filtered out.The system correspondingly contains the above-mentioned matrix, scanning engine and processing module.The application solves the problems of low resource reuse rate, poor scanning efficiency and insufficient signal reliability of traditional scheme, realizes high hardware utilization, microsecond level delay and high robustness multi-mode input scanning.

To provide a key switch apparatus and a key switch control method which can detect an operation of a key at an early timing and allow a series of strokes at high speed.SOLUTION: A key switch apparatus according to the present invention has a key Ky for outputting a signal responding to a depression amount of the key, a depression amount detecting unit 51 for detecting a depression amount of the key Ky, an A / D conversion unit 14 for converting the depression amount of the key Ky to digital data, and a RAM 122 for storing a plurality of operation points for use in switching a mode of the key Ky between an on mode and an off mode according to the digital data. The apparatus further has a key switch control unit 11 which outputs a switch-on signal when the depression amount is higher as compared with any of the operation points while the depression amount of the key Ky is increased and which outputs a switch-off signal when the depression amount is lower as compared with any of the operation points while the depression amount of the key Ky is decreased.SELECTED DRAWING: Figure 1

The invention discloses a hot standby color intrigue integrated circuit chip capable of receiving and transmitting control signals, which contains GRB lamp beads and integrates a control signal interface circuit, a GRB color intrigue driving circuit, an address code memory and a series-parallel unibus serial communication circuit. The address code input pins and the address code output pins of the n integrated circuit chips are cascaded front and back to form a series data line network, and a sequence formed by cascading the integrated circuit chips is written into the address code memory and is used as a communication address code; and the parallel data line pins are connected in parallel to form a parallel data line network DIO. According to the invention, each external signal device is equivalently provided with a special signal processing chip, and the special signal can be transmitted by adopting a serial serial single bus communication protocol and can also be transmitted by adopting a parallel serial single bus communication protocol with an address code; a serial connection and parallel connection double-path serial single bus communication protocol can be adopted for transmission, mutual hot standby can be achieved, and GRB lamp beads can be arranged.

The application discloses a key extension and recognition method, wherein the extension method comprises the following steps: outputting strong low level, weak high level and weak low level by each I / O port in a scanning period; outputting strong high level when the code output foot outputs weak low level, and outputting weak high level at other time. The I / O port and the I / O port or the ground form an extended key when the I / O port output weak high level is pulled down by strong low level, and the I / O port and the power supply or the code output foot form an extended key when the I / O port output weak low level is pulled up by the power supply or the code output foot. According to the key extension and recognition method, the code output foot key and the power supply key are extended by different scanning modes, so that more key functions are realized without increasing I / O ports, the method is efficient, the cost is not increased, and the application range is wider.

The utility model discloses a matrix keying circuit of an ultrasonic liquid level sensor, which comprises a microcontroller, a row signal line, a column signal line, an isolation power supply circuit, an anti-interference module, a signal processing and control unit and a collaborative module interface, and the row signal line and the column signal line are both electrically connected with the microcontroller and the anti-interference module. The anti-interference module is electrically connected with the isolation power supply circuit and the signal processing and control unit, and the signal processing and control unit is electrically connected with the cooperation module interface. According to the utility model, the isolation power supply circuit is separated from a system line, so that ground loop interference can be effectively avoided, and through cooperation of the filter circuit and the isolation circuit, high-frequency noise can be effectively filtered, power supply ripples can be reduced, signal conduction interference can be effectively blocked, and the stability of the matrix key circuit in the using process can be improved; therefore, the stability of the ultrasonic liquid level sensor is improved.

The invention discloses a key pressing method and system and electronic equipment, and the method comprises the steps: if a scanning thread detects a single key of which the level state of a pin is changed, generating a key pressing event for the single key of which the level state is changed, and adding the key pressing event into an event queue; if the event processing thread determines that the to-be-processed key event is a press-down event for the first single key, a second single key of which the interval duration between the press-down time and the press-down time of the to-be-processed key event is smaller than a threshold value exists, and a target combined key exists in the key registry; if yes, not accumulating the press-down duration of the first single key, stopping accumulating the press-down duration of the second single key, and starting accumulating the press-down duration of the target combined key; and calling a key callback function corresponding to the target combined key by the event processing thread according to the pressing duration of the target combined key and a long pressing threshold value corresponding to the target combined key so as to execute a corresponding business logic. According to the invention, code redundancy can be effectively reduced.

The utility model relates to an NFC wireless entity password keyboard which comprises a keyboard shell, a wireless module, a keyboard scanning module, an electric quantity obtaining circuit and an information output circuit, the keyboard scanning module is electrically connected with the wireless module through the electric quantity obtaining circuit, and the wireless module is suitable for obtaining electric quantity near an NFC intelligent terminal. The keyboard scanning module is in communication connection with the wireless module through the information output circuit, the wireless module is suitable for being connected with an NFC intelligent terminal to output key information, firstly, the password keyboard is close to the intelligent terminal with an NFC function, the wireless module is in induction with an NFC module of the intelligent terminal, electric energy is extracted from the terminal through the electric quantity obtaining circuit, and the password keyboard is connected with the wireless module. A stable working voltage is provided for the keyboard scanning module, a user presses a password keyboard key, the keyboard scanning module scans key information in real time, wireless communication is conducted through the compatible RF interface and the NFC module of the terminal, finally, the key information is safely transmitted to the intelligent terminal, and password input operation is completed.

The invention belongs to the technical field of touch key detection, and particularly relates to a disc type pulley touch detection method applied to an FPC (Flexible Printed Circuit). Comprising the following steps: performing register initialization and double-frequency-point frequency hopping touch scanning to obtain a touch maximum value, a touch intermediate value and a touch minimum value of each key; taking the difference between the touch maximum value and the touch minimum value as a noise value of each key; comparing the noise values according to a preset noise judgment condition so as to judge whether the touch detection system is in a noise environment at present, and correspondingly setting or clearing a noise flag bit; selecting the touch intermediate value or the touch minimum value as a current effective touch value according to the noise flag bit; under the condition that no effective touch exists and the touch change is stable, the touch reference value of each key is slowly updated in a weighting mode; according to the invention, the problems of unstable pressing and sensitivity deviation of a touch pulley system are solved.

The invention relates to the technical field of key scanning, and discloses a matrix key detection method and device, electrical equipment and a storage medium. A two-dimensional array is created, the first dimension in the two-dimensional array represents all keys to be scanned in matrix keys, and the second dimension in the two-dimensional array represents all keys to be scanned in the matrix keys; the second dimension is used for storing a determined state sampling value set of each key after multiple times of continuous scanning, then scanning the matrix key based on a preset time interval, storing the state sampling value of each key obtained by each time of scanning into a two-dimensional array, and finally obtaining the state sampling value of each key based on the state sampling value set corresponding to each key stored in the two-dimensional array. According to the method, the press-down state of the key is determined, the influence of instantaneous interference on a single scanning result is avoided, the misjudgment rate is greatly reduced by performing statistical analysis on multiple groups of sampling values, and the accuracy and reliability of key judgment are improved.

The application discloses a touch detection circuit, comprising: a touch channel equivalent capacitor Cx, an external anti-interference resistor Rx, an internal matching capacitor Cs, a first equivalent resistor Rs, a second equivalent resistor Rf, an internal regulating capacitor Cf, an analog-to-digital converter ADC, a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, a fifth switch K5, and a sixth switch K6, wherein the first equivalent resistor Rs is an equivalent series resistor of the internal matching capacitor Cs to a working power supply VDD, and the second equivalent resistor Rf is an equivalent resistor between the Cf and the Cs. The application can solve the slow response of multiple keys caused by long scanning time, improve the sensitivity, be suitable for wider touch applications, have strong anti-interference ability, and have a good mass production prospect.