330 results about "Mutual capacitance" patented technology

The invention relates to a modeling and optimizing method for inter-layer signal crosstalk of a PCB (Printed Circuit Board). Frequency response data of all dielectric layers of the PCB under different temperature and humidity conditions are collected, and a mapping model with the temperature gradient and the humidity diffusion gradient as input and the dielectric constant as output is established. And calculating the dynamic distribution of mutual capacitance and mutual inductance under the environment change by combining the spatial layout parameters of the differential signal pair, and constructing a crosstalk sensitivity evaluation model with coupled frequency, environment and layout. And high-risk areas with crosstalk sensitivity caused by environment change are identified, and the crosstalk change rate of each area is quantified. For a sensitive area, a temperature and humidity compensation medium structure is introduced to stabilize local dielectric characteristics and reduce the influence of the environment on crosstalk. And according to the compensated medium distribution, adjusting a differential signal wiring path and impedance matching by adopting an optimization method with the aim of minimizing the crosstalk change rate, and generating a wiring layout with environmental robustness. According to the invention, the signal integrity and the transmission reliability of the multi-layer PCB in a temperature and humidity changing environment can be effectively improved.

The embodiment of the invention discloses a water detection method and device for a touch screen, terminal equipment and a storage medium, which are used for updating a confidence value corresponding to a waterproof mode according to capacitance data of a current scanning frame, reducing the false recognition rate of an interference scene and improving the rate of entering the waterproof mode. The method comprises the steps of obtaining capacitance data of the touch screen in a current scanning frame, wherein the capacitance data comprises at least one of self-capacitance data and mutual capacitance data; according to the capacitance data, a confidence value is updated according to the capacitance data, the confidence value of the current scanning frame is obtained, and the confidence value is used for representing the credibility of water on the surface of the touch screen; and judging whether to enter or exit a waterproof mode according to the confidence value of the current scanning frame.

A sensor is provided, which includes an on-cell mutual-capacitance touch sensor and a RX electrode layer (RX sensor coil group) including a plurality of RX electrodes that detect a pen alternating magnetic field generated by a pen, which has accumulated energy through an alternating magnetic field from a TX electrode layer (TX sensor coil group). The TX electrode generates the alternating magnetic field for detecting a position of the pen by using an electromagnetic induction effect. In the RX electrode layer (RX sensor coil group), floating patterns, which are surrounded by touch electrodes formed by a mesh electrode pattern provided in an on-cell touch layer of the on-cell mutual-capacitance touch sensor and which are adjacent to one another in an extension direction of the RX electrodes, are connected to one another by jumper wires to linearly form RX electrode wires.

The invention discloses a vehicle exterior handle waterproof false triggering system and method based on double-frequency-point charging and discharging resonance, and relates to the technical field of automotive electronics. An electrode array composed of capacitance detection electrodes is arranged on the inner side of a vehicle exterior handle to form a vehicle exterior handle capacitance sensor; in a non-interference environment, high-frequency and low-frequency mutual capacitance reference values are collected, and a compensation parameter library is established by associating outer handle shell parameters of the vehicle; a self-capacitance channel of the electrode array is used for detecting proximity signals, high-frequency and low-frequency mutual capacitance signals are collected, and the high-frequency and low-frequency mutual capacitance signals are preprocessed; calling a compensation parameter library to correct the preprocessed high and low frequency mutual capacitance signal, and calculating the mutual capacitance increment and change slope of the high and low frequency mutual capacitance signal; based on the mutual capacitance increment and the change slope, human body touch and water interference are distinguished by analyzing high-frequency and low-frequency signals.

The invention discloses an ECPT system based on a bilateral LC and bilateral LCLC hybrid compensation network, and relates to the technical field of wireless electric energy transmission, the ECPT system comprises an electric energy transmitting end and an electric energy receiving end, two sets of coupling mechanisms of which the cross coupling capacitance can be neglected respectively use bilateral LC and bilateral LCLC topologies for compensation, and the two are connected with an inverter and a load through series input and series output combination. The bilateral LC compensation topology and the bilateral LCLC compensation topology both adopt constant current mode matching, the system can achieve the constant current output characteristic irrelevant to the load, and due to the fact that the output characteristics of the two compensation topologies and the coupling mutual capacitance CM are in a complementary relation, the system can basically achieve constant power output under the change of the coupling mutual capacitance CM. And good anti-coupling mechanism deviation performance is shown.

The invention relates to a foot sole sensing device, an insole, a shoe, a sock and a machine foot sole fixture. The foot sole sensing device comprises a bottom surface sensing unit, a switch array and a CDC, each sensing unit comprises a plurality of flexible lower electrodes which are laid on the sole and serve as partitions, a plurality of protrusions are formed on the upward side of each partition electrode, the outer surface of each protrusion is an elastic curved surface, an upper electrode is arranged above each protrusion, and an inner insulating layer with the thickness ranging from 10 nanometers to 1 millimeter is arranged between each protrusion and the corresponding upper electrode. The CDC is respectively coupled with each upper electrode, and is coupled with each partition electrode through the switch array; the CDC and the switch array are coupled with the processor, and the processor identifies the environment condition under the foot according to the mutual capacitance between the non-adjacent partition electrodes of the non-contact area before the foot sole is in complete contact with the terrain and the mutual capacitance between the adjacent partition electrodes of the contact area after the foot sole is in partial or complete contact with the terrain. And detecting the pressure distribution condition of the sole according to the capacitance value of each upper electrode contacted with the terrain.

The disclosure provides a touch module, a touch display panel and a display device. Each touch electrode includes a plurality of electrode blocks arranged along an extending direction, and electrode blocks belonging to other touch electrodes are distributed in an area where at least part of all the electrode blocks are located, which makes full use of an interior area of a traditional touch pattern and increases a coupling area between the touch electrodes. When touch occurs, an amount of change in a mutual capacitance value between the touch electrodes will be significantly increased, thereby increasing touch sensitivity.

A method of testing a display apparatus using a touch sensor and a touch integrated circuit is presented. The touch sensor includes a driving electrode line and a detection electrode line, and the touch integrated circuit includes a signal driving unit and a signal detection unit. The method includes sensing a first mutual capacitance of predetermined test coordinates by applying a first driving signal to the driving electrode line and receiving a detection signal from the detection electrode line, sensing a second mutual capacitance of the predetermined test coordinates by applying a second driving signal to the driving electrode line and receiving a detection signal from the detection electrode line, and determining whether a touch operation is performed based on a difference between the first mutual capacitance and the second mutual capacitance.

A capacitive touch screen display operates by: receiving a plurality of sensed signals indicating variations in mutual capacitance associated with a plurality of cross points formed by a plurality of electrodes; generating capacitance image data associated with the plurality of cross points that includes positive capacitance variation data corresponding to positive variations of the capacitance image data from a nominal value and negative capacitance variation data corresponding to negative variations of the capacitance image data from the nominal value; determining, based on the positive capacitance variation data and the negative capacitance variation data, an upper threshold and a lower threshold; generating compensated capacitance image data, based on the upper threshold and the lower threshold; and processing the compensated capacitance image data to determine a proximal condition of the touch screen display.

In a method for testing an electronic device, the method includes: providing an electronic device including a display layer and a sensor layer on the display layer and configured to operate at a touch drive frequency, the sensor layer including a plurality of first electrodes and a plurality of second electrodes insulatively intersecting the plurality of first electrodes; providing a test signal having a test frequency higher than the touch drive frequency to the plurality of first electrodes; measuring mutual capacitance with the plurality of first electrodes through the plurality of second electrodes; and determining whether or not the sensor layer is defective, based on the mutual capacitance.

Embodiments of the present disclosure relate to an electronic device for determining an active state of a touch sensor comprising a capacitance measurement circuit to be coupled to the touch sensor, the touch sensor comprising a first electrode and a second electrode, the capacitance measurement circuit is configured to obtain a first measurement based on a self-capacitance of the first electrode and a second measurement based on a mutual capacitance between the first and second electrodes. The algorithm module is configured to apply an algorithm to the first and second measurements, thereby generating a result signal. The threshold comparator is configured to compare the result signal to a threshold and to generate a comparison signal having a first comparison value if the result signal is greater than the threshold and to generate a comparison signal having a second comparison value if the result signal is less than the threshold. The output module is configured to provide an output signal based on the comparison signal, wherein the output signal is indicative of an activation state of the touch sensor.

A display device includes a display panel and a touch panel, wherein the display panel has a light-emitting layer, a first electrode, and a second electrode, the touch panel has a first touch electrode, and a second touch electrode that is driven by a driving signal for detecting a touch in response to a change in mutual capacitance between the first touch electrode and second touch electrode, and the display device further includes a shield electrode formed between the first electrode and touch panel to be applied with a shield-electrode signal.

The present invention relates to a measurement apparatus for a secreted substance of a vital body. The apparatus comprises a suction film, an electrode detection assembly, a capacitive-to-digital conversion (CDC) circuit and a processing module, wherein the suction film is configured to suck a secreted substance of a vital body; the CDC circuit is coupled to the electrode detection assembly, and is configured to acquire, via the electrode detection assembly, the mutual capacitance of when there is the secreted substance on the suction film; and the processing module is coupled to the CDC circuit, and the processing module is configured to obtain the mutual capacitance of when there is no secreted substance on the suction film, and to output, according to the acquired two mutual capacitances, a content signal of the substance secreted by the vital body.

The invention relates to a tactile sensor, a manipulator and a sole wearable device for detection by using planar mutual capacitance. The tactile sensor comprises a sensing unit, a CDC and a digital processing circuit, the sensing unit is provided with a flexible electrode, the flexible electrode forms an elastic curved surface bulge, each bulge corresponds to the first detection electrode and the second detection electrode, and the bulges and the first detection electrode form planar mutual capacitance; an insulating layer is arranged between each bulge and the corresponding detection electrode, and the shape of a gap between the first detection electrode and the second detection electrode is configured as follows: the bulge gradually changes the area of indirect contact between the first detection electrode and the second detection electrode and / or the length of a mutual capacitance gap path between the first detection electrode and the second detection electrode along with stress deformation in the projection area of the bulge; each flexible electrode is configured to be coupled with the ground during detection electrode capacitance sampling; the CDC is respectively coupled with each detection electrode; and the digital processing circuit is used for logic processing and / or logic sequence control and is coupled with the CDC.

In a steering wheel unit, when any one of electrostatic capacitances measured by a capacitance measurer while a self capacitance detection mode is set by a mode switcher is equal to or larger than a first threshold value, it is determined that the operator's hand is in contact with a rim at a position that overlaps at least one of electrodes. When the electrostatic capacitance is equal to or larger than a second threshold value, which is smaller than a first threshold value, and smaller than the first threshold value, the mode is switched to the mutual capacitance detection mode. After the switching, when an electrostatic capacitance newly measured in the mutual capacitance detection mode is equal to or larger than a third threshold value, it is determined that the operator's hand is in contact with the rim at a position that overlaps a gap between the electrodes.

An apparatus including via structures capable of reducing crosstalk effects is provided. The apparatus includes a printed circuit board (PCB) including sequentially stacked multi-layers, a first via structure that partially penetrates the multilayers of the PCB and is connected to a first metal plate on a first layer of the multilayers, and a second via structure adjacent to the first via structure in a horizontal direction, partially penetrating the multi-layers of the PCB, and connected to a second metal plate disposed on a second layer of the multi-layers. A portion where the first metal plate and the second metal plate overlap each other is configured to provide a first mutual capacitive coupling between the first and second via structures.

The invention discloses a high-precision touch electrode applied to a touchpad, belongs to the technical field of capacitive touchpads, and provides an electrode pattern applied to the touchpad to improve the mutual capacitance change rate between TX and RX after finger touch so as to improve the accuracy of the touchpad. By optimizing the electrode pattern design, the mutual capacitance change rate between TX and RX after finger touch is remarkably improved, the accuracy of the touch panel is improved, and many benefits are brought to a user. The higher mutual capacitance change rate means that the control IC can more accurately detect the position touched by the finger, so that more accurate touch positioning is realized. The higher mutual capacitance change rate enables the chip to detect the finger more easily, the detection time is shortened, and the finger touch coordinate detection speed is improved. A user can experience a more accurate and smooth operation feeling, a higher SNR is provided by a higher mutual capacitance change rate, and it is guaranteed that the touch panel can keep reliable performance in various environments.

The present application relates to the technical field of information, and provides a lid open / close detection method. The method comprises: in each detection cycle, sending a driving signal to a first touch electrode of a touchpad or a second touch electrode of a touch screen, and detecting a mutual capacitance generated between the first touch electrode and the second touch electrode; on the basis of the mutual capacitance and a first mapping relationship, determining a folding angle range of an electronic device, the first mapping relationship representing correspondences between capacitances and folding angle ranges; and on the basis of the folding angle range of the electronic device, determining a lid open / close state of the electronic device. By using the method to detect the mutual capacitance between the touchpad and the touch screen of the electronic device, lid open / close detection for the electronic device can be implemented, effectively improving the efficiency of lid open / close detection while reducing costs.

The present disclosure relates to a self- and mutual-capacitance hybrid touch sensor panel architecture. A touch sensor panel is disclosed herein. The touch sensor panel includes a first set of touch electrodes configured to operate as drive lines and disposed in a first layer of the touch sensor panel. The touch sensor panel also includes a second set of touch electrodes configured to operate as sense lines and disposed in a second layer of the touch sensor panel different from the first layer of the touch sensor panel such that one or more mutual-capacitance touch nodes are formed by the first set of touch electrodes and the second set of touch electrodes. The touch sensor panel further includes a third set of touch electrodes configured to operate as self-capacitance electrodes and disposed in the first layer or the second layer of the touch sensor panel.

According to an embodiment, a method for determining the folding angle of a foldable device is proposed. The device includes a touch controller, a display layer, and a touch-sensing layer. The device is foldable along a folding axis. A first portion is in contact with a second portion of the display layer in a fully closed position of the device. The method includes activating a mutual-capacitance sensing mechanism by configuring one or more channels of the touch-sensing layer parallel to the folding axis on the first portion of the display layer as transmit channels, and configuring one or more channels of the touch-sensing layer parallel to the folding axis on the second portion of the display layer as receive channels; collecting mutual-capacitance raw data measurements; determining the folding angle based on the mutual-capacitance raw data measurements; and activating a function or an application based on the folding angle.

A touch panel and a display device are provided by embodiments of the present application, a self-capacitance module in an original touch panel is replaced with a mutual capacitance module, and a combination of self-capacitance and mutual capacitance is adopted to effectively reduce wiring in the touch panel and to reduce cost at a same time.

A touch method, a sensing signal processing circuit, and a mutual capacitance touch device, the sensing signal processing circuit comprising: a first signal processing branch, a second signal processing branch, a first mixer of the first signal processing branch, two input ends respectively inputting a superimposed sensing signal and a first local oscillator signal, and a second mixer of the second signal processing branch, the output end is coupled with the input end of the first integrating circuit; the first integrating circuit outputs a baseband signal corresponding to the first sensing signal; a second mixer of a second signal processing branch, two input ends of which are respectively used for inputting the superposed sensing signal and a second local oscillator signal, and an output end of which is coupled with an input end of a second integrating circuit; the second integrating circuit outputs a baseband signal corresponding to the second sensing signal, and the second driving frequency is determined by the first zero frequency of the low-pass filter and the first driving frequency. By adopting the scheme, the complexity of the dual-frequency mutual capacitance touch device cannot be increased too much while the mutual interference between the two driving frequencies can be effectively suppressed.

The invention discloses a non-contact moving object charge measurement method based on a mutual capacitance matrix, and belongs to the technical field of electrostatic detection. According to the invention, a physical model for charge measurement is constructed, a capacitance matrix is established by using a mirror image principle, a mutual capacitance value between a measured charged body and an induction electrode is solved by using a mirror image method, a circuit model for non-contact charge measurement is constructed, and the charge of the measured charged body is measured by using the model. Compared with a measurement method based on an electrometer, the non-contact type charge quantity measurement method has the advantages that the charge quantity of the to-be-measured charged body is not changed in the measurement process, repeated measurement is facilitated, and compared with an existing detection method based on an electric field sensor and the electric field change rate, a mathematical model for non-contact type charge quantity measurement is established; the corresponding relation between the charge quantity of the detected charged body and the amplitude of the electrostatic signal is accurately represented, and the method has a good application prospect in the field of electrostatic detection.

The kettle comprises a kettle body and a kettle cover, a PCB used for detecting the liquid level is arranged outside the side wall of the kettle body, the PCB comprises a base plate and a plurality of electrode plates installed on the base plate, the electrode plates are electrically connected to a main control module, the electrode plates are arranged on the base plate at intervals to form a water level detection area, and the water level detection area is connected with the water level detection area. The water level detection area comprises a low water level detection area located at the bottom of the base plate, a plurality of first electrode plates and second electrode plates arranged on one sides of the first electrode plates are arranged in the low water level detection area, and the detection height of the second electrode plates is larger than that of the first electrode plates. The water level detection area comprises the low water level detection area and is used for meeting different low water level detection requirements under various working conditions, and meanwhile real-time water level signals are calibrated through self-capacitance and mutual capacitance detection of the first electrode plate and the second electrode plate in the low water level detection area. The precision of water level detection is improved.

The invention provides a liquid quantity detection system based on a capacitive sensing array, and relates to the technical field of liquid quantity detection. According to the system, a capacitive sensor array is arranged in a supporting shell; the supporting shell is used for supporting the capacitive sensor array, so that the capacitive sensor array clings to the outer surface of the tubular container; a solution with the liquid amount to be detected is contained in the tubular container; the control module is connected with the capacitive sensor array; the control module is used for controlling each excitation electrode in a plurality of excitation electrodes included in the capacitive sensor array based on a mutual capacitance measurement method, and sending excitation signals to a plurality of detection electrodes included in the capacitive sensor array; the capacitive sensor array is used for outputting capacitance values between the excitation electrodes and the corresponding detection electrodes under the action of excitation signals to obtain a plurality of capacitance values; the data calculation module is used for calculating the height of the liquid with the liquid amount to be detected in the tubular container according to the capacitance values. The accuracy of liquid amount detection is improved.

Systems and methods to simultaneously transmit a plurality of transmit signals, assign control logic to assign transmit signals to transmitters, receive a superimposed receive signal comprising a plurality of receive signal components originating from the transmit signals, wherein two receive signal components of the superimposed receive signal are in quadrature. Capacitive touch systems and methods comprising: transmitters of transmit signals; transmit electrodes and a receive electrode positioned to have mutual capacitances between the transmit electrodes and the receive electrode at mutual capacitance nodes, wherein a mutual capacitance at a mutual capacitance node deviates when an interfering object is proximate, wherein the transmit electrodes are physically adjacent, wherein the transmit electrodes are driven by the transmit signals, and a receiver of a superimposed receive signal comprising receive signal components that are in quadrature.

The application relates to an anti-interference low-power-consumption identification device, which is especially suitable for chess or jigsaw puzzles. The electrodes of a first unit are used as common excitation to obtain the differential mutual capacitance of a second unit and a third unit. In the case that there are electronic devices or environmental factors around the electrodes, the differential mutual capacitance C12=(C1+environmental common-mode interference) mutual capacitance of the second unit-(C2+C environmental common-mode interference) mutual capacitance of the third unit=C1-C2. The interference of the environmental factors can be basically eliminated in the differential mode, so that the common-mode interference is eliminated, the error code rate is reduced, the scanning time is reduced by half (differential scanning is to scan two columns at the same time, and two pattern informations can be obtained through one measurement, so that the measurement efficiency is improved), the power consumption is reduced, and the battery endurance is prolonged.

This invention provides a quantitative inversion method for multidimensional features of cable defects based on local capacitance distortion mapping. By acquiring capacitance data under normal and fault conditions, and utilizing the asymmetry and ratio relationship of local capacitance changes, it achieves decoupling and independent inversion of multidimensional defect features, enabling quantitative assessment of cable defects. The method includes: Step 1, defect angle position inversion; inputting the measured mutual capacitance change of the defect, qualitatively judging the angle position interval, constructing defect angle position feature parameters to obtain the relative angle of the defect, and inverting the defect angle position; Step 2, defect radial depth inversion; inputting the measured self-capacitance change and mutual capacitance change of the defect, and the defect angle position, and inverting the defect radial depth; Step 3, defect size and dielectric constant inversion; inputting the measured self-capacitance change and mutual capacitance change of the defect, the defect angle position, and the defect radial depth, and obtaining the defect size and dielectric constant based on size optimization and inversion.

Aspects of the embodiments disclosed herein include electrical systems that reduce crosstalk, such as far-end crosstalk (FEXT) between two or more signal paths of a memory system by electromagnetically coupling the two or more signal paths each comprising a respective trace. Electromagnetically coupling the two or more respective traces includes positioning at least two traces in close proximity with each other such that a mutual-to-self-inductance ratio (Lm / L) between the at least two signal paths matches or substantially matches the mutual-to-self-capacitance ratio (Cm / C) of the at least two signal paths. Certain embodiments of this disclosure are directed to a passive manner of reducing FEXT between any number of signal paths without adding traces with the sole purpose of reducing crosstalk, thereby reducing or maintaining a signal density between designs of a component of an IC package.