Class / Patent application number | Description | Number of patent applications / Date published |
324684000 | With compensation means | 42 |
20090009194 | NORMALIZING CAPACITIVE SENSOR ARRAY SIGNALS - An embodiment of the present invention is directed to a method for processing a position signal. The method includes receiving a first position signal from a capacitive sensor and determining a proximity of the capacitive sensor to a connection of an array of capacitive sensors. The sensitivity of the capacitive sensor is then adjusted and a second position signal is received from the capacitive sensor. The second position signal may then be reported. The present invention facilitates more accurate readings from an array of capacitive sensors. | 01-08-2009 |
20090015269 | Stray Capacitance Compensation for a Capacitive Sensor - A capacitive sensor ( | 01-15-2009 |
20090153152 | COMPENSATION CIRCUIT FOR A TX-RX CAPACITIVE SENSOR - A capacitive sensor may include a transmit electrode and a receive electrode capacitively coupled with the transmit electrode. A capacitance sensing circuit senses a capacitance between the transmit and receive electrodes by applying a signal to the transmit electrode and rectifying a current waveform induced at the receive electrode. A compensation circuit reduces the effect of a mutual and parasitic capacitances of the transmit and receive electrode pair by adding a compensation current to the rectified current. | 06-18-2009 |
20090160461 | CAPACITIVE SENSOR AND MEASUREMENT SYSTEM - A system includes a capacitive sensor including a first electrode and a second electrode. The system includes a measurement system configured to sense a capacitance between the first electrode and the second electrode and apply a first offset to the sensed capacitance to provide an offset compensated capacitance. | 06-25-2009 |
20090267622 | System and method for detecting an object at a location - An occupancy detection system includes a signal generator coupled to an electrode, the signal generator configured to output a first signal at a first frequency and a second signal at a second frequency. The system further includes a voltage detection circuit connected to an output terminal of the signal generator and to an input terminal of the electrode, wherein the voltage detection circuit is configured to measure a first voltage responsive to the first signal at the first frequency and a second voltage responsive to the second signal at the second frequency. A control module in communication with the voltage detection circuit is configured to detect a state of occupancy based on the first voltage and the second voltage. | 10-29-2009 |
20090309615 | METHOD AND SENSOR ARRANGEMENT FOR MEASURING THE MIXING RATIO OF A MIXTURE OF SUBSTANCES - As regards a measurement structure which is as simple as possible and in order to influence the mixing operation or the transfer of substances to the slightest possible extent, a method for measuring the mixing ratio of a mixture of substances comprising at least two substances ( | 12-17-2009 |
20100097078 | Noise Handling in Capacitive Touch Sensors - In a capacitive sensor of the type having X electrodes which are driven and Y electrodes that are used as sense channels connected to charge measurement capacitors, signal measurements are made conventionally by driving the X electrodes to transfer successive packets of charge to the charge measurement capacitors. However, an additional noise measurement is made by emulating or mimicking the signal measurement, but without driving the X electrodes. The packets of charge transferred to the charge accumulation capacitor are then indicative of noise induced on the XY sensing nodes. These noise measurements can be used to configure post-processing of the signal measurements. | 04-22-2010 |
20110084711 | CAPACITANCE SENSING CIRCUIT WITH ANTI-ELECTROMAGNETIC INTERFERENCE CAPABILITY - The present invention relates to a capacitance sensing circuit with anti-EMI capability. A filter is coupled to a capacitor under test; receives a plurality of reference signals; and produces a first filter signal and a second filter signal. A difference circuit receives the first and second filter signals; eliminates the common-mode noise in the first and second filter signals; and produces a difference signal. The amplitude of the difference signal is related to the capacitance value of the capacitor under test. Thereby, the purpose of sensing capacitance can be achieved. In addition, by eliminating common-mode noise using the difference circuit, the anti-EMI capability can be achieved. Because the difference circuit can adjust the dynamic range of the output of the filter, the capacitance sensing circuit with anti-EMI capability can achieve capacitance sensing in few clock cycles. | 04-14-2011 |
20110133760 | Systems and Methods for Minimizing Stray Current In Capacitive Sensor Data - A method for minimizing stray current in capacitive sensor data includes receiving a first input from a first wire of a wire harness, the wire harness comprising a plurality of twisted wires, the first input comprising a first signal comprising first sensor data and stray current; receiving a second input from a second wire of the wire harness, the second input comprising a second signal comprising stray current; and subtracting the second signal from the first signal to determine the first sensor data. A system for minimizing stray current in capacitive sensor data is also provided. | 06-09-2011 |
20110148440 | PARASITIC CAPACITANCE CANCELLATION IN CAPACITIVE MEASUREMENT APPLICATIONS - An integrated circuit for compensating for parasitic capacitance in a capacitive measuring apparatus wherein a capacitance measurement is done by repeatedly transferring charge from a capacitor to be measured to a reference capacitor. | 06-23-2011 |
20110215819 | OBSCURED FEATURE DETECTOR WITH BUILT-IN CORRECTION MODULE - A surface-conforming obscured feature detector includes a plurality of sensor plates, each having a capacitance that varies based on the dielectric constant of the materials that compose the surrounding objects and the proximity of those objects. A sensing circuit is coupled to the sensor plates | 09-08-2011 |
20110298480 | Compensation of parasitic capacitances of capacitive sensors - Circuits and methods for compensating the impact of parasitic capacitances on capacitive sensors have been achieved. The charge of a compensation capacitor assigned to each capacitive sensor is used to neutralize the charge of the parasitic capacitor. | 12-08-2011 |
20120098553 | CAPACITANCE DETERMINATION IN A SWITCHED MODE POWER SUPPLY - A method of determining a measure of a total capacitance of one or more capacitive elements connected to an output of a switched mode power supply is described. The method includes generating a voltage control signal to cause an output voltage control signal age controller to sweep a voltage at the output of the switched mode power supply from an initial voltage value to a final voltage value. Sample values of a current at the output measured by a current sampler during the sweep of the output voltage are received, and an integrated current value representing a measure of the total capacitance using the received sample values is calculated. | 04-26-2012 |
20120182028 | CAPACITANCE DETECTING DEVICE - In a capacitance detecting device including an offset adjustment circuit for removing offset from charge transmitted to an integrator from a charge reading mechanism, the offset adjustment circuit includes a variable capacitance element switching the number of capacitative elements connected in parallel to a charge transmission line made up of a plurality of the capacitative elements and setting the number to a predetermined capacitance value; and a capacitative element for adjustment connected in parallel to the variable capacitance element and parallel, and having a capacitance value corresponding to the minimum value of the capacitative elements constituting the variable capacitance element. Driving is controlled so that offset removal is performed only N times (M>N; M and N are natural numbers) in the capacitative element for adjustment while offset removal is repeated M times in the variable capacitance element. | 07-19-2012 |
20120200307 | COMPENSATION CIRCUIT FOR A TX-RX CAPACITIVE SENSOR - A capacitive sensor may include a transmit electrode and a receive electrode capacitively coupled with the transmit electrode. A capacitance sensing circuit senses a capacitance between the transmit and receive electrodes by applying a signal to the transmit electrode and rectifying a signal induced at the receive electrode. A compensation circuit reduces the effect of a mutual and parasitic capacitances of the transmit and receive electrode pair by adding a compensation signal to the rectified signal. | 08-09-2012 |
20120326734 | CAPACITANCE SENSOR WITH IMPROVED NOISE FILTERING CHARACTERISTICS, METHOD FOR NOISE FILTERING OF CAPACITANCE SENSOR AND COMPUTER-READABLE RECORDING MEDIUM - Disclosed is a capacitance sensor including: a capacitance-voltage/current converter which converts a capacitance value of a sense capacitor into a voltage signal or a current signal by using an input signal; a multiplier which applies a weight to an output signal of the capacitance-voltage/current converter and outputs the weighted output signal; and an accumulator which accumulates continuously the output signal of the multiplier. | 12-27-2012 |
20130015867 | TOUCH SENSING METHOD AND APPARATUSAANM Aras; SualpAACI DallasAAST TXAACO USAAGP Aras; Sualp Dallas TX USAANM Nihei; TatsuyukiAACI TokyoAACO JPAAGP Nihei; Tatsuyuki Tokyo JPAANM Rahman; AbidurAACI AllenAAST TXAACO USAAGP Rahman; Abidur Allen TX US - A method for measuring for generating a touch capacitance measurement is provided. Gain and offset control signals are generated, where the gain and offset control signals are adjusted to compensate for base capacitance of a touch sensor. The gain control signal is applied to a touch sensor during a first phase of a clock signal, and the offset control signal is applied to an output circuit during a second phase of the clock signal. The output circuit is coupled to the touch sensor during the second phase of the clock signal. The touch capacitance measurement is generated by compensating for the base capacitance with the gain and offset control signals, and a gain is applied to the touch capacitance measurement. | 01-17-2013 |
20130127479 | CAPACITOR SENSORS AND SYSTEM AND METHODS FOR NON-CONTACT OBJECT DETECTION - A non-contact object detection system includes a capacitor sensor and a control system, the control system providing a AES (Adaptive Excitation Signal) to the capacitor sensor, the AES (Adaptive Excitation Signal) configured according to an environment in which the capacitor sensor is deployed, the AES (Adaptive Excitation Signal) configured to produce a threshold voltage from the capacitor sensor to the control system in the environment when an object is not in a detection area of the capacitor sensor. | 05-23-2013 |
20130169295 | LEAKAGE CURRENT COMPENSATION CIRCUIT - Circuitry is described for compensating leakage currents in capacitive sensing circuits. A single active leakage compensation circuit may sense a representative leakage current and drive a plurality of output transistors, each of which provides a compensating current to a respective capacitive sensing circuit. The leakage compensation circuit may sense current flow through a device substantially equivalent to a device exhibiting leakage current in a capacitive sensing circuit, and in response, provide a signal to drive one or more output transistors to supply approximately equivalent currents to a plurality of circuit nodes. For embodiments having multiple similar capacitive sensors and capacitive sensing circuits, only one transistor need be added to each capacitive sensing circuit to compensate for leakage current. | 07-04-2013 |
20130207676 | CAPACITIVE OCCUPANT DETECTION SYSTEM - A capacitive occupant detection system comprises at least one antenna electrode to be arranged in a seat and an evaluation unit operatively coupled to said at least one antenna electrode, said evaluation unit being configured for applying, during operation, an alternating voltage signal to said antenna electrode and for detecting an amplitude and/or phase of a displacement current flowing from said antenna electrode towards ground. According to the invention said antenna electrode comprises an antenna electrode conductor and at least one dedicated ground electrode, said ground electrode being arranged at a predetermined distance of said antenna electrode conductor and extending along said antenna electrode conductor. | 08-15-2013 |
20130314108 | AC VOLTAGE MEASUREMENT CIRCUIT - A voltage measurement circuit is operative to measure a high voltage AC signal and includes a capacitive divider circuit and a compensator circuit. The capacitive divider circuit includes first and second inputs, across which, in use, is received a high voltage AC signal and also includes second and third capacitors. First and second plates of each of the first, second and third capacitors are defined by conductive layers of a printed circuit board and the dielectric of each of the first, second and third capacitors being defined by a non-conducting part of the printed circuit board. A compensator circuit has a configurable transfer function and includes an input connected across the first and second plates of the third capacitor and an output. The compensator circuit is operative to change a voltage received at its input in accordance with the transfer function and to provide the changed voltage at its output. | 11-28-2013 |
20130342225 | Capacitive Analysis of a Moving Test Material - The capacitive measuring circuit for a moved elongated test material contains at least two measuring capacitors, each of which is configured for receiving the test material. It further contains electrically actuatable selection means, by means of which one of the measuring capacitors can be selected in such a way that only the selected measuring capacitor contributes to the measurement, whereas the other measuring capacitors do not. As a result, the total capacitance of the measuring circuit is reduced and its sensitivity is increased. | 12-26-2013 |
20140035601 | ELECTROSTATIC CAPACITANCE DETECTION CIRCUIT AND INPUT DEVICE - An electrostatic capacitance detection circuit includes a charge amplifier that has an operational amplifier in which a capacitor is provided on a feedback path, and into which a signal including detection of electric charge of an inter-electrode capacitor of a sensor electrode and electric charge due to an external noise, and a selection switch that can switch a direction of a capacitor that is connected to input and output terminals of the charge amplifier through a feedback path that switches the direction of the capacitor depending on a direction of electric charge flowing in from a detection-side electrode of the sensor electrode, due to a drive signal applied to the sensor electrode. | 02-06-2014 |
20140049275 | COMPENSATING CIRCUIT HAVING PROGRAMMABLE CAPACITANCE ARRAY FOR MEASURING AC VOLTAGE - A compensating circuit which has a programmable capacitance array for measuring AC voltage is disclosed in the present invention. The compensating circuit includes a pair of first leads for linking to an AC circuit; a variable capacitor, electrically linked to the first leads, for providing different capacitance value according to a programmable capacitance array; and a control unit, electrically linked to the first leads, for changing the capacitance value of the variable capacitor as one capacitance of the programmable capacitance array according to an external instruction. Since the capacitance of the compensating circuit is changeable, and AC voltage meter designed with the compensating circuit is able to measure voltage in wider range of frequency. | 02-20-2014 |
20140062507 | ELECTRIC CHARGE DETECTION CIRCUIT - Ends on one side of physical quantity detection sensors formed of any of an electric charge generation-type sensor and a capacitance change-type sensor can be connected to negative electrode input terminals of a differential amplifier circuit, and ends on the other side are connected to positive electrode input terminals of the differential amplifier circuit. A feedback resistor and a feedback capacitor are connected in parallel between the negative electrode input terminal and an output terminal of the differential amplifier circuit, and a cancel resistor and a cancel capacitor are connected in parallel between a reference voltage and the positive electrode input terminal of the differential amplifier circuit. Drain voltage adjustment circuits can be provided that adjust the drain voltage of at least one of two field effect transistors to which positive and negative differential inputs of the differential amplifier circuit are individually inputted. | 03-06-2014 |
20140070824 | SHORTING STRUCTURE IN PLASTIC ROLL-TO-ROLL PROCESS - Roll-to-roll processes for manufacturing touch sensors on a plastic base film are provided. The touch sensors can be deposited on the base film using various patterning techniques. One or more shorting bars can also be patterned onto the base film to couple together traces, such as drive lines, sense lines, conductive traces, and the like, of the touch sensor to prevent a potential difference from forming between traces due to static buildup during the manufacturing process. After the touch sensor is fully formed on the base film, the touch sensor can be removed from the base film using lithography or a physical cutting process. The removal process can separate the touch sensor from the one or more shorting bars, thereby uncoupling the traces of the touch sensor. | 03-13-2014 |
20140091817 | ELECTRONIC DEVICE EQUIPPED WITH CAPACITIVE TYPE TOUCH PANEL - An electronic device includes a touch panel and a position detection circuit operable to output a position signal indicating a position at which the touch panel operated with an object. The detection circuit is operable perform a correction process to capacitance measurement values of electrodes of the touch panel to provide capacitance correction values. The detection circuit is operable to determine whether or not the electronic device is in a holding status in which the electronic device is held based on the capacitance measurement values or the capacitance correction values. The detection circuit is operable to perform a calibration process to correct the correction process if determining that the electronic device is in the holding status. The detection circuit is operable to output the position signal based on the capacitance measurement values or the capacitance correction values. This electronic device can avoid a false detection in approaching detection. | 04-03-2014 |
20140118012 | Sensor Device as Well as Method for Proximity and Touch Detection - A sensor device has a first electrode structure and a second electrode structure, the first electrode structure has a transmitting electrode, a compensation electrode and a reception electrode and the second electrode structure has a field transmission electrode and at least one field sensing electrode. The first electrode structure is adapted to detect a gripping of an electric hand-held device, whereas the second electrode structure is adapted to detect an approach of a finger to the second electrode structure, for example of the hand gripping the hand-held device. | 05-01-2014 |
20140145734 | Capacitor Sensing Circuit - The present invention provides a capacitor sensing circuit, comprising a driving unit, a switching unit, a differential integrator circuit, and a post-processing circuit. The driving unit is for providing driving signals and timing required by the capacitor sensing circuit, the switching unit switches signals according to two inverting timings, φ | 05-29-2014 |
20140239982 | Wearable Device with Capacitive Sensor and Method of Operation Therefor - A wearable device includes a capacitive sensor and capacitance sensing and calibration logic operative to determine that component drift for a capacitive sensor cannot be determined based on a capacitance sensed by the capacitive sensor. The capacitance sensing and calibration logic deactivates a drift calibration operation for the capacitive sensor while the capacitive sensor senses the capacitance. The capacitance sensing and calibration logic is further operative to determine that the capacitance sensed by the capacitive sensor is within a detection threshold that indicates that a conductive surface is within proximity of the capacitive sensor. The capacitance sensing and calibration logic can also determine that a wearable device, that includes the capacitive sensor, is in motion based on sensed intermittent changes in the capacitance. Various other methods of operation are disclosed. | 08-28-2014 |
20140239983 | CAPACITIVE SENSING - A capacitive sensing system includes a controller, a node connected to one side of a capacitance, the controller configured to measure the capacitance by measuring a time for a voltage across the capacitance to reach a predetermined reference voltage, and the controller causing the time period for capacitance measurements to vary even when the capacitance is constant. | 08-28-2014 |
20140266259 | PROCESS MEASUREMENT SYSTEM WITH VARIABLE AMPLITUDE SENSOR EXCITATION - A process measurement system includes a sensor for producing a sensor signal as a function of a process parameter and a measurement circuit that converts the sensor signal to measurement data. A control circuit controls the amplitude of the sensor excitation to maximize signal strength over the entire operating ratio range of the sensor. This enhances resolution and noise rejection of the measurement circuit. | 09-18-2014 |
20140266260 | Apparatus and a Method for Generating a Sensor Signal Indicating Information on a Capacitance of a Variable Capacitor Comprising a Variable Capacitance - An apparatus for generating a sensor signal indicating information on a capacitance of a variable capacitor including a variable capacitance includes a sensor unit and a compensation unit. The sensor unit is configured to generate a sensor signal indicating information on a varying current flowing through a connection between the sensor unit and the variable capacitor caused by a variation of the capacitance of the variable capacitor while the variable capacitor is biased by a predefined bias voltage. Further, the compensation unit is configured to influence the sensor signal or to provide a compensation signal capable of influencing the sensor signal so that the sensor signal includes less nonlinear signal portions than a sensor signal without the influence of the compensation unit or the compensation signal. | 09-18-2014 |
20140375340 | Capacitor Based Angle Sensor - A capacitor based sensor for angular position detection having two fixed plates arranged at an angle and a semicircular rotating plate in between. The sensor can determine any angular position in the full 0-360 degrees range. The sensor may be temperature compensated, and integrated with electronics such that sensor module only has two electrical leads, one for input power and one for input/output digital data. A method for converting capacitance measurements to an angle is also disclosed. | 12-25-2014 |
20150008943 | Sensor Arrangement and Method for Operation of an Operating Device - A sensor arrangement comprises an input surface, an optical sensor, a first capacitive sensor, an evaluation unit and a device. The input surface has at least one light-permeable part surface. The optical sensor is disposed below the at least one light-permeable part surface. The first capacitive sensor is disposed below the input surface. The evaluation unit is coupled to the optical sensor and configured to carry out a light-permeability measurement of an object located on the input surface using the optical sensor. The device is configured to evaluate a change in capacitance of the first capacitive sensor. The device is connected to the first capacitive sensor and further configured to generate a first output signal if there is a change in capacitance. The evaluation unit is further configured to generate a presence signal if a measured light permeability falls below a predetermined value. | 01-08-2015 |
20150097585 | Sensor System And Method For Reducing A Settling Time Of A Sensor System - A sensor system has a first sensor device and a second capacitive sensor device for detecting a movement of the object relative to a detection surface, wherein the sensor system may be operated in a first mode of operation and in a second mode of operation, wherein the sensor system may be switched over from the first mode of operation into the second mode of operation, wherein the second capacitive sensor device has a number of second sensor electrodes, and wherein in the sensor system at least in the second mode of operation at least one signal path connectable with a predetermined fixed electric potential is provided, which is parallel to a parasitic capacitance of the first sensor device. | 04-09-2015 |
20150369850 | Electromagnetic Wave Measuring Apparatus and Electromagnetic Wave Measuring Method - It is an object to provide an electromagnetic wave measuring apparatus and an electromagnetic wave measuring method that suppress deterioration in sensitivity of electromagnetic noise in electromagnetic wave measurement. | 12-24-2015 |
20160123776 | Sensor System - A proximity sensor system configured to interface a gate-supply with a sensor includes a sensor to detect a user, and a gate-supply to provide power to an apparatus that includes circuitry to boost power from the gate-supply for the sensor. The circuitry includes a NPN bipolar input transistor and a PNP bipolar output transistor. The base of the input transistor is connected to the input of the apparatus. The collector of the output transistor and the emitter of the input transistor are connected together to the output of the apparatus. The emitter of the output transistor is connected to a supply voltage and the collector of the input transistor is connected to the base of the output transistor. | 05-05-2016 |
324685000 | For temperature variation | 4 |
20090102492 | ANGLE MEASURING DEVICE - An angle measuring device for optical angle measurement has a telescope body which is rotatably mounted around at least one shaft ( | 04-23-2009 |
20090167327 | THERMAL EFFECT AND OFF-CENTER LOAD COMPENSATION OF A SENSOR - A method and system of thermal effect and off-center load compensation of a sensor are disclosed. In one embodiment, a sensor includes a first conductive surface and a second conductive surface substantially parallel to the first conductive surface, a processing and communication zone of the first conductive surface and the second conductive surface having circuitry to enable communication with an external system (e.g., using a Universal Serial Bus (USB) interface) and a sensing area having partially a ceramic substrate surrounding a sensor surface and a reference surface of the first conductive surface and the second conductive surface. The sensor may include a set of electrical leads that enable the sensing area to communicate with the processing and communication zone and with external devices, and a guard ring surrounding the first conductive surface and the second conductive surface to minimize an effect of stray capacitance. | 07-02-2009 |
20130207677 | ELECTROSTATIC CAPACITANCE SENSOR AND METHOD FOR DETERMINING FAILURE OF ELECTROSTATIC CAPACITANCE SENSOR - The disclosure has: a detection electrode ( | 08-15-2013 |
20150091590 | TOUCH SENSOR - Disclosed herein is a touch sensor using a metal electrode. More specifically, the present invention relates to a touch sensor capable of implementing reliability of the metal electrode and having economical efficiency even under a condition of high temperature and humidity by forming a first protection layer including a heterocycle compound on metal fine lines forming the electrode pattern. | 04-02-2015 |