Including A Guard Or Ground Electrode Patents (Class 324/688)
  • Patent number: 9740348
    Abstract: A capacitive input device comprises a plurality of receiver electrodes and a plurality of transmitter electrodes. The plurality of receiver sensor electrodes is oriented substantially parallel to a first axis proximate to a sensing region of the capacitive input device. The plurality of transmitter sensor electrodes is oriented substantially parallel to a second axis proximate to the sensing region and configured to be capacitively coupled with the plurality of receiver sensor electrodes. At least one of a receiver sensor electrode of the plurality of receiver sensor electrodes and a transmitter sensor electrode of the plurality of transmitter sensor electrodes is disposed in a configuration forming multiple crossings with a line that is perpendicular to the first axis, the multiple crossings occurring proximate to the sensing region.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: August 22, 2017
    Assignee: Synaptics Incorporated
    Inventors: David Hoch, Massoud Badaye
  • Patent number: 9702902
    Abstract: A printed circuit board (P) has an evaluation device (E) and an electrode configuration of a capacitive sensor, wherein the electrode configuration has at least two electrodes, one arranged above the other and spaced apart from each other, which each are formed by portions of at least one electrically conductive layer of the printed circuit board (P), and wherein at least one electrode of the electrode configuration is coupled with the evaluation device (E) via a conductor path of the printed circuit board (P). Furthermore, an electric handheld device may have at least one such printed circuit board (P).
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: July 11, 2017
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventor: Stefan Burger
  • Patent number: 9535022
    Abstract: A system for detecting moisture characteristics of a material of a complex structure while the material is in situ or forms part of the complex structure. The system includes at least one moisture detection sensor positioned proximate the material of the complex structure while the material is in situ. The system also includes a controller in data receiving communication with the moisture detection sensor.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: January 3, 2017
    Assignee: The Boeing Company
    Inventors: Kimberly D. Meredith, Morteza Safai, Sahrudine Apdalhaliem
  • Patent number: 9494544
    Abstract: A hybrid sensor includes a proximity sensor section and a load sensor section. The proximity sensor section includes a first base material, a plurality of first front-side electrodes, a plurality of first back-side electrodes, and a protective layer. Each of these members is made of an elastomer. The proximity sensor section detects the approach and coordinates of an object to be detected, based on a change in capacitance between the first front-side electrode and the first back-side electrode which is caused by the approach of the object to be detected. The load sensor section detects pressing and coordinates of the object to be detected, based on a load that is applied from the object to be detected via the proximity sensor section.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: November 15, 2016
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Tomonori Hayakawa, Hitoshi Ukai
  • Patent number: 9476905
    Abstract: A sensor element includes: a detection electrode section; a movable body that is provided to face the detection electrode section; and a protruding section that is provided in a region where the detection electrode section is provided in a plan view of the detection electrode section seen in a vertical direction and protrudes toward the movable body. At least a part of a surface of the protruding section is made of an insulating material.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: October 25, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Shigekazu Takagi
  • Patent number: 9410998
    Abstract: A system for obtaining incremental and absolute displacement measurements using systems of electrodes that interact to form variable capacitors and systems that facilitate implementation of the method along with exemplary embodiments of these systems. The capacitors created by the disclosed method have known physical properties and corresponding known mathematical relationships. These laws are exploited in such a way by our method as to overcome inadequacies in existing systems and create superior systems. These superior systems improve upon the existing art by including economically and reliably made sensors based on the area varying principle which eliminate dead zone issues and increase accuracy through a reduction of the influence of gap variations on capacitive systems through the use of compensatory geometrical arrangements of multiple capacitive systems.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: August 9, 2016
    Inventor: Li Lin
  • Patent number: 9354263
    Abstract: A capacitive measuring device for a hand-held device, particularly an electric hand-held device for the detection of an approach to the hand-held device, has a switching device, wherein the ground of the capacitive measuring device is galvanically connectable with an electrically conductive structure of the hand-held device by a switching device, and wherein the capacitive measuring device has a ground electrode structure with at least one ground electrode that can be arranged on the hand-held device, wherein the ground of the capacitive hand-held device is galvanically connectable with the at least one ground electrode by the switching device.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: May 31, 2016
    Assignee: MICROCHIP TECHNOLOGY GERMANY GMBH
    Inventors: Axel Heim, Artem Ivanov, Roland Aubauer
  • Patent number: 9184588
    Abstract: A power delivery system is disclosed for an isolated measurement system in which a power transmitter and power receiver are provided at powered and unpowered sides of an isolation barrier, respectively. The power transmitter and power receiver may be coupled by an isolator. The power transmitter may deliver power to the power receiver to power components on the unpowered side of the isolation barrier. The system may include a controller provided in the powered side to generate a clock signal defining timing of a predetermined operation of the measurement system and to generate a disabling signal to the power transmitter controller synchronously with the timing of the predetermined operation.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: November 10, 2015
    Assignee: ANALOG DEVICES, INC.
    Inventor: Michael Mueck
  • Patent number: 9151791
    Abstract: A capacitive detection control interface device is provided, including at least one measurement electrode including an active surface, a guard made from an electrically conductive material placed adjacent to the measurement electrodes, the guard is excited up to an alternating electric potential substantially identical to that of the measurement electrodes, a first electronic component for exciting the electrodes and processing the measurement signals from the capacitive coupling of the electrodes with an object laced adjacent thereto, the electronic component is at least partly referenced to the electric potential of the guard, and a second electronic component for performing another functional display, placed adjacent to the active surface which second electronic component is at least partly referenced to the electric potential of the guard.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: October 6, 2015
    Assignee: Nanotec Solution
    Inventor: Didier Roziere
  • Patent number: 9035662
    Abstract: A device and a method for the capacitive detection of an object which is preferably arranged behind a flat article that is transparent to electromagnetic radiation or a wall, including a sensor incorporating sensor electrodes for the detection of the object, preferably for the detection of relative movements between the sensor and the flat article or a finger, where a control circuit serves for the control of the sensor electrodes and for the evaluation of the output signals of the sensor, and, due to the fact that the sensor comprises at least one sensor electrode which is surrounded by at least one further electrode, the surrounding further electrode is connected to the sensor electrode by the control circuit in such a manner that, in the event of a change of the potential of the sensor electrode, the potential of the surrounding further electrode is regulated in the opposite sense to the sensor electrode in such a way that the sensor electrode remains at a pre-determined or pre-definable potential, such th
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: May 19, 2015
    Inventor: Gerd Reime
  • Publication number: 20150123682
    Abstract: Provided is a method for detecting a position of an object relative to an electrode configuration with at least three electrodes, wherein a first electrode substantially is arranged parallel or concentrically to a second electrode, a third electrode is arranged in an acute angle or excentric relative to the first electrode, the first electrode is loaded with a first generator signal, and wherein the second electrode may be loaded with a second generator signal. The second generator signal preferably is inverse with respect to the first generator signal. In addition, provided for the method is a suitable electrode configuration with at least three electrodes.
    Type: Application
    Filed: September 20, 2012
    Publication date: May 7, 2015
    Inventor: Stefan Burger
  • Patent number: 9007075
    Abstract: The contactless conductivity detector in one embodiment includes a microfluidic chip having a channel (102) thereon and four detection electrodes: first and second emitting electrodes (100a, 101a), and first and second receiving electrodes (100b, 101b). The channel (102) is defined by channel walls. The first emitting electrode (100a) and the first receiving electrode (100b) are adjacent a first channel wall, and the second emitting electrode (101a) and the second receiving electrode (101b) are adjacent a second channel wall, the second channel wall being opposite the first channel wall.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: April 14, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Kambiz Ansari Mahabadi, Isabel Rodriguez Fernandez, Chee Yen Lim
  • Patent number: 9000782
    Abstract: A capacitive measurement device includes: at least one measurement electrode having an active surface; at least one guard made from an electrically conductive material placed adjacent to the measurement electrode(s), the guard being excited up to an alternating electric potential substantially identical to that of the measurement electrodes; and a first electronic device for exciting the electrode(s) and processing the measurement signals from the capacitive coupling of the electrode(s) to an object placed adjacent thereto, the electronic device being at least partially referenced to the electric potential of the guard. The measurement device further includes apparatus for performing another function, placed adjacent to the active surface, and a second electronic device provided for monitoring the apparatus for performing another function, the second electronic device being at least partially referenced to the electric potential of the guard.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: April 7, 2015
    Assignee: Nanotec Solution
    Inventor: Didier Roziere
  • Patent number: 8988087
    Abstract: Touchscreen testing techniques are described. In one or more implementations, a conductor is placed proximal to a touchscreen device and the touchscreen device is tested by simulating a touch of a user by placing the conductor in a grounded state and lack of a touch by the user by placing the conductor in an ungrounded state.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: March 24, 2015
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Aleksandar Uzelac, David A. Stevens, Weidong Zhao, Takahiro Shigemitsu, Briggs A. Willoughby, John Graham Pierce
  • Patent number: 8957689
    Abstract: 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.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: February 17, 2015
    Assignee: IEE International Electronics & Engineering S.A.
    Inventors: Michael Virnich, David Hoyer, Martin Thinnes
  • Patent number: 8933710
    Abstract: A capacitive measurement device is provided, including: (i) a first electronic system electrically referenced to a guard potential and connectable to capacitive electrodes; (ii) a second electronic system electrically referenced to a ground potential; and (iii) an energizing component connected to the guard and ground potentials, respectively, to impart an AC voltage differential between the potentials. The device also includes an integrated circuit that is referenced to the ground and includes a first installation area in which the first electronic system is implemented, and a second installation area in which the second electronic system is implemented. Also included are systems using the device and uses of the device.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: January 13, 2015
    Assignee: Nanotec Solution
    Inventors: Christophe Blondin, Christian Neel, Didier Roziere
  • Patent number: 8896326
    Abstract: An occupant detection system includes a controller, a sensing electrode, and a shield electrode, the electrodes disposed in a vehicle seat. The controller is electrically coupled to the sensing electrode and shield electrode by a sensing circuit. The controller is configured to send an input signal to the sensing electrode, the shield electrode, or both and measures current, impedance, or capacitance values to determine the presence of an object on the seat, to classify the object, or both.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: November 25, 2014
    Assignee: TK Holdings Inc.
    Inventors: James Gregory Stanley, Philip Maguire
  • Publication number: 20140285223
    Abstract: A capacitance type occupant detection sensor includes a capacitive sensor, a reference electrode, a voltage application part, a current detector, a capacitance calculator, and a determination part. The capacitive sensor has a main electrode and is placed to a vehicle seat. The reference electrode is applied with reference voltage. The voltage application part applies detection voltage to the main electrode. The current detector detects detection current flowing through the main electrode. The capacitance calculator calculates a first capacitance between the main electrode and the reference electrode. The determination part determines an occupant of a vehicle. The capacitive sensor has a sub electrode. The determination part switches between an occupant detection mode and a wet detection mode. The capacitance calculator calculates first conductance, a second conductance, and a third conductance. The determination part determines whether the occupant exists and whether the vehicle seat is wet.
    Type: Application
    Filed: February 4, 2014
    Publication date: September 25, 2014
    Applicant: Denso Corporation
    Inventor: Takashi Inoue
  • Patent number: 8810249
    Abstract: A 3D Motional Command System (MCS) is disclosed for interactive gaming, computer interfaces, communications, imaging, and geological exploration. The system can perform standoff gesture recognition and also function as touch-screens. E-field sensors and array topologies are disclosed comprised of FET discrete transistors. The designs facilitate the fabrication of high density sensor arrays similar to LCD displays. The system can be used in portable and wearable electronic devices. Uses are for PC computers, portable devices, and gaming systems such as the Wii. Other applications include wireless connection of sensor and audio data from a simple headphone jack output.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: August 19, 2014
    Inventor: Thomas G. Cehelnik
  • Patent number: 8742774
    Abstract: An apparatus for measuring a workpiece includes a capacitance probe mounted to a probe housing and a non-conductive spacer. The capacitance probe includes a probe tip with a sensor surface that emits an electric field. The non-conductive spacer extends between a probe contact surface and a workpiece contact surface. The probe contact surface covers the sensor surface, and the workpiece contact surface contacts the workpiece during the measuring of the radius.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: June 3, 2014
    Assignee: United Technologies Corporation
    Inventor: Joseph D. Drescher
  • Patent number: 8720279
    Abstract: Three or more electrodes are arranged on either a window frame or window glass of an automobile. An electric field measurement unit measures the capacitance between various combinations of the electrodes to detect whether an object is located between the window frame and window glass. A control circuit varies the sensitivity of the electric field measurement unit by switching amongst the electrodes used for capacitance measurement based on the movement and position of the window glass.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: May 13, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventor: Shunichi Ogawa
  • Patent number: 8674710
    Abstract: A capacitive occupant detection apparatus comprising a sensor unit and a control unit is disclosed. The sensor unit includes a detection electrode and a periphery guard electrode. The control unit includes: a signal application circuit for applying an oscillation signal to the detection electrode; an operational amplifier for applying to the guard electrode a signal having the same phase and potential as the oscillation signal applied to the detection electrode; and a control circuit for receiving current and voltage values supplied to the detection and for determining a mounting state on a seat based on the inputted current and voltage values (including phase information). The periphery guard electrode is located to surround the detection electrode when viewed from an upper side of the detection electrode.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: March 18, 2014
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Masayoshi Satake, Hiroyuki Mori, Kouji Ootaka, Hajime Nakagawa, Toshihiro Hattori, Noboru Maeda
  • Publication number: 20140049276
    Abstract: The invention relates to a lithography system. The lithography system has a projection lens system and a capacitive sensing system. The projection lens system is provided with a final projection lens. The capacitive sensing system is arranged for making a measurement related to a distance between the final projection lens and a target. The capacitive sensing system includes at least one capacitive sensor. Additional, the capacitive sensing system is provided with a flexible printed circuit structure and at least one integrated flex print connector. The at least one sensor is located in the flexible printed circuit structure. The flexible printed circuit structure has a flexible base provided with conductive electrodes for the at least one sensor and conductive tracks. The conductive tracks extend from the electrodes along the at least one integrated flex print connector.
    Type: Application
    Filed: October 28, 2013
    Publication date: February 20, 2014
    Applicant: MAPPER LITHOGRAPHY IP B.V.
    Inventors: Guido DE BOER, Johnny Joannes Jacobus VAN BAAR, Kaustubh Prabodh PADHYE, Robert MOSSEL, Niels VERGEER, Stijn Willem Herman Karel STEENBRINK
  • Patent number: 8640074
    Abstract: A digital circuit block includes first to fourth conducting segments, a digital logic, first and second conducting layers, and a dielectric layer. The first and second conducting segments are coupled to first and second supply voltages, respectively. The digital logic and dielectric layer are between the first and second conducting segments. The third conducting segment includes a first end electrically connected to the first conducting segment, a second end not electrically connected to the second conducting segment, and a first portion located at the first conducting layer. The fourth conducting segment includes a first end electrically connected to the second conducting segment, a second end not electrically connected to the first conducting segment, and a second portion located at the second conducting layer. The first and second portions and dielectric layer are formed a first capacitive element to reduce the supply voltage drop between the first and second supply voltages.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: January 28, 2014
    Assignee: Mediatek Inc.
    Inventors: Shen-Yu Huang, Chih-Ching Lin
  • Publication number: 20140004905
    Abstract: A directional capacitive proximity sensor circuit capable of providing directional capacitive proximity sensing includes one or more guard electrodes, a first sensor, and a second sensor. The directional capacitive proximity sensor is installed in a device such that the first sensor is positioned near a first component of the device, and the second sensor is positioned near a second component of the device. The first and second sensors measure a capacitance to detect proximity of a user relative to the respective sensor, wherein the detected proximity is interpreted to determine a direction in which the user proximity is detected relative to the directional capacitive proximity sensor circuit. The guard electrode is provided to mitigate stray capacitance to reduce error in the capacitance measurements obtained by the first and second sensors.
    Type: Application
    Filed: July 2, 2012
    Publication date: January 2, 2014
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Jenn Woei Soo, Kien Beng Tan
  • Patent number: 8614690
    Abstract: Methods and apparatus for correcting electrical noise coupling from a liquid crystal module to a plurality of sense elements disposed within a touch sensor panel, and for reducing errors in touch detection algorithms. Erroneous signal values detected by the sense elements may be corrected by utilizing a set of reference elements for detecting noise common to both the sense elements and the reference elements, and a correction module for effectively subtracting out the noise from the sensed values. Errors in touch detection algorithms may be reduced by providing a more uniform spacing between successive sense elements. In some embodiments, one or more dummy ground elements may be inserted between adjacent sense elements in order to reduce signal interference.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 24, 2013
    Assignee: Apple Inc.
    Inventors: Martin Paul Grunthaner, Steve Porter Hotelling
  • Patent number: 8610591
    Abstract: The invention inter alia relates to a method for monitoring the bearing current of an electrical machine (10). An electrode (100) arranged at a distance (d) to a shaft and the shaft—due to the gap (S) between the electrode and the shaft—produce a measurement capacitance (C) and an electric shift current (i) which flows through the measurement capacitance when there is a temporal change of the voltage (Ug) applied between the shaft and the housing is measured. A measurement signal (Ms) indicating a bearing current flow is generated when the shift current or a measurement variable produced by the shift current meets a predetermined trigger criterion. Preferably, the electrode has a circular inner contour so that the gap is annular. The annular inner contour results in an error compensation in the case of a balance error of the shaft because the factor dC/dt remains at least substantially constant. Due to the contactless measurement of the shift current, no contact brushes for contacting the shaft are required.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: December 17, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Richard Kretschmer, Arno Steckenborn, Oliver Theile
  • Publication number: 20130328577
    Abstract: A capacitance-type occupant detection sensor of the present disclosure detects a vehicle occupant on a seat based on a difference of capacitance between a sensor body and a reference electric potential. The sensor body includes a main electrode and a parallel electrode. The parallel electrode is disposed in parallel with the main electrode with a gap interposed therebetween and has a detection voltage applied thereto. The main electrode and the parallel electrode each have a base material, a first electrode member disposed on the base material, and a second electrode member disposed on the base material to cover the first electrode member, where the second electrode member has an electric conductivity that is lower than the first electrode member. The first electrode member is disposed on a lateral perimeter of the second electrode member to surround a center of the second electrode member.
    Type: Application
    Filed: May 15, 2013
    Publication date: December 12, 2013
    Applicants: Nippon Soken, Inc., DENSO CORPORATION
    Inventors: Masayoshi Satake, Hiroyuki Mori, Hajime Nakagawa
  • Publication number: 20130300440
    Abstract: A capacitive touch sensor includes multiple first-axis traces, multiple second-axis traces, an insulation layer and multiple metal traces. Each first-axis trace includes multiple first touch-sensing pads and first connecting lines connected therebetween. Each second-axis trace includes multiple second touch-sensing pads and second connecting lines connected therebetween. At least one of the first connecting line and the second connecting line is a metal printing line.
    Type: Application
    Filed: July 22, 2013
    Publication date: November 14, 2013
    Applicants: Wintek, Corporation, Wintek (China) Technology Ltd.
    Inventors: HSIANG-WEI YIN, MING-KUNG WU, KUO-CHANG SU, PING-WEN HUANG
  • Patent number: 8581881
    Abstract: A conductive shield that is disposed near the sensor, wherein a signal is driven on the shield that is similar to the signal induced on the sensor, thereby reducing stray capacitances and protecting the sensor from external noise sources, and resulting in a stronger signal reaching the sensor.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: November 12, 2013
    Assignee: Cirque Corporation
    Inventor: Jared G. Bytheway
  • Patent number: 8570055
    Abstract: A capacitive sensing system with a sensor having a thin film structure. The thin film structure includes a first insulating layer and a first conductive film having a sensing electrode formed on a first surface of the first insulating layer and a second conductive film having a back guard electrode. The back guard electrode is formed in a single plane and has a peripheral portion in the same plane, and is disposed on a second surface of the first insulating layer and a first surface of a second insulating layer or protective layer. The peripheral portion of the back guard electrode extends beyond the sensing electrode to form a side guard electrode which substantially or completely surrounds the sensing electrode.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: October 29, 2013
    Assignee: Mapper Lithography IP B.V.
    Inventors: Guido De Boer, Johnny Joannes Jacobus Van Baar, Kaustubh Prabodh Padhye, Robert Mossel, Niels Vergeer, Stijn Willem Herman Karel Steenbrink
  • Patent number: 8487638
    Abstract: Disclosed is an electrical capacitance sensor comprising: a board 10 having a one main surface and an other main surface; a sensor electrode 26 formed on the one main surface of the board 10 and detecting an electrical capacitance between the sensor electrode 26 and an object; a first guard electrode 25 formed on the one main surface of the board 10 and in a vicinity of the sensor electrode 26; and a second guard electrode 27 formed on the other main surface of the board 10, wherein a first terminal connecting portion 21 for the first guard electrode 25 and a second terminal connecting portion 23 for the second guard electrode 27 are provided at positions opposing each other.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: July 16, 2013
    Assignee: Fujikura Ltd.
    Inventors: Takuya Osaki, Masahiro Kondo, Koji Sakiyama
  • Patent number: 8427181
    Abstract: A follower amplifier with power supply biased by a controlled voltage source such that the power supply potentials are, for the frequencies of interest, as close as possible to the potential of the follower output. There is proposed a front-end electronic circuit for biopotential and impedance measurements with outstanding performances (very high input impedance and gain very close to unity). Preferably, the explicit guard electrode and the explicit electronic unit at the belt are no longer necessary; all electronics is embedded in units placed directly at the measurement sites. Moreover, the proposed front-end electronic circuit allows a drastic simplification of the cabling and connectors since all units are connected to only one wire (the theoretical minimum) for potential reference and current return. Preferably, this wire does not even require an electrical isolation and can be easily embedded in the textile of a shirt, in a garment, mesh, belt, etc.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: April 23, 2013
    Assignee: CSEM Centre Suisse d' Electronique et de Microtechnique SA—Recherche et Developpement
    Inventors: Olivier Chetelat, Josep Sola I Caros
  • Patent number: 8421482
    Abstract: An anti-pinching device (18) for a pivotable actuating element (6) of a motor vehicle (2) is specified. Said device comprises a capacitive sensor (8) which is intended to contactlessly detect an obstacle in the path of the actuating element (6) and has an electrode (14) for generating an external electric field opposite a counterelectrode (16), wherein the electrode (14) extends in a radial direction (R) of the pivoting movement of the actuating element (6), and a control unit (10) which is set up to interpret a change in a measurement capacitance (CM), which is formed between the electrode (14) and the counterelectrode (16), as pinching when the changed measurement capacitance (CM) exceeds a triggering threshold (A) which is predefined on the basis of an opening angle (?) of the pivotable actuating element (6) and to track the triggering threshold (A).
    Type: Grant
    Filed: July 28, 2007
    Date of Patent: April 16, 2013
    Assignee: Brose fahrzeugteile GmbH & Co. Kommanditgesellschaft
    Inventors: Holger Wuerstlein, Thomas Weingaertner, Wolf-Christian Mueller
  • Patent number: 8421480
    Abstract: A multidirectional switch member and an electronic device includes an operation plate in which a pressing operation may be performed in a plurality of directions including four standard directions and a median direction extending between the four standard directions, a PCB that is located at the back side of the operation plate, a plurality of conductive bodies that are provided on the back side of the operation plate, a group of standard direction contact electrodes that each have a first electrode and a first ground potential electrode along each of the standard directions, and a group of median direction contact electrodes that have two of a second electrode and a second ground potential electrode along the median direction, wherein the two second electrodes and the first electrodes, which are located along both sides of the median direction, are located next to each other and are electrically connected to each other.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: April 16, 2013
    Assignee: Shin-Etsu Polymer Co., Ltd.
    Inventor: Hitoshi Ando
  • Patent number: 8410932
    Abstract: A capacitive sensor array including a sensor electrode which detects the intrusion of an object, a shield electrode and a background electrode. A control and evaluation circuit is coupled to the sensor electrode which detects a change in the capacitance of the sensor electrode. The sensor electrode periodically evaluates at least one of a current and voltage profile to detect the capacitance change. The shield electrode is coupled to the sensor electrode through the control and evaluation circuit such that it has no influence on the measured capacitance. The background electrode is controlled such that its potential is periodically switched between the reference potential and a second potential. When the sensor electrode is coupled with the first potential, the background electrode may be located on the reference potential. When the sensor electrode is not coupled with the first potential, the background electrode may be located on the second potential.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: April 2, 2013
    Assignee: Huf Hulsbeck & Furst GmbH & Co. KG
    Inventor: Peter Van Gastel
  • Publication number: 20130069674
    Abstract: An apparatus for measuring a workpiece includes a capacitance probe mounted to a probe housing and a non-conductive spacer. The capacitance probe includes a probe tip with a sensor surface that emits an electric field. The non-conductive spacer extends between a probe contact surface and a workpiece contact surface. The probe contact surface covers the sensor surface, and the workpiece contact surface contacts the workpiece during the measuring of the radius.
    Type: Application
    Filed: September 19, 2011
    Publication date: March 21, 2013
    Applicant: United Technologies Corporation
    Inventor: Joseph D. Drescher
  • Patent number: 8400409
    Abstract: An interface device and method are provided for sensing movement of an actuator across a surface of a window in an enclosure thereof. The interface device comprises an optical navigation sensor including an illuminator within the interface to illuminate at least a portion of the actuator through the window when the actuator is positioned in contact with or proximal to the surface of the window, and a detector to receive light reflected through the window from the actuator. The interface device further includes a number of capacitive guard-sensors in the enclosure adjacent to the optical navigation sensor to disable the optical navigation sensor when a conductive body is sensed in proximity to the guard-sensors.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: March 19, 2013
    Assignee: Cypress Semiconductor Corporation
    Inventor: Mark Francis
  • Patent number: 8397525
    Abstract: The invention relates to a device for controlling a condensate lift pump, comprising a means for detecting at least two condensate levels in a container, and a means for activating and for stopping the pump according to the levels, in which the detection means comprises a capacitive detector comprising at least three electrodes: a ground electrode; a first level detection electrode; and a second level detection electrode, and a processing means comprising a means for measuring the capacitance between the electrodes. According to the invention, the lengths of the first level detection electrode and second level detection electrode are defined so as to come into contact with the condensates, when the condensates respectively reach the first level and the second level in the container; these electrodes are produced on distinct supports not having a submergible physical continuity between them.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: March 19, 2013
    Assignee: Sauermann Industrie
    Inventors: Antoine Chauvin, Fabrice Leze, Michel Baillon
  • Publication number: 20130015868
    Abstract: A capacitance sensing system can include a plurality of transmit (TX) electrodes disposed in a first direction; a plurality of first electrodes disposed in a second direction and coupled to the TX electrodes by a mutual capacitance, and coupled to a capacitance sense circuit when at least one TX electrode receives a transmit signal; and a plurality of second electrodes structures, interspersed with the first electrodes and coupled to a ground node at least while the one TX electrode receives the transmit signal.
    Type: Application
    Filed: September 27, 2011
    Publication date: January 17, 2013
    Applicant: CYPRESS SEMICONDUCTOR CORPORATION
    Inventor: Tao Peng
  • Patent number: 8243043
    Abstract: A conductive shield that is disposed near the sensor, wherein a signal is driven on the shield that is similar to the signal induced on the sensor, thereby reducing stray capacitances and protecting the sensor from external noise sources, and resulting in a stronger signal reaching the sensor.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: August 14, 2012
    Assignee: Cirque Corporation
    Inventor: Jared G. Bytheway
  • Patent number: 8232810
    Abstract: An input device is provided with improved electrostatic discharge protection. Specifically, the input device includes a plurality of capacitive sensing electrodes configured for object detection. An electrostatic discharge (ESD) shunt is disposed near the capacitive sensing electrodes and configured to provide ESD protection to the capacitive sensing electrodes. The input device also includes an extended-proximity capacitive sensing electrode configured to for object detection of relatively distant objects. The ESD shunt has an associated first resistance, and the extended-proximity capacitive sensing electrode has an associated second resistance.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: July 31, 2012
    Assignee: Synaptics Incorporated
    Inventors: Joseph Kurth Reynolds, Tracy Scott Dattalo
  • Publication number: 20120187965
    Abstract: A capacitive measurement device includes: at least one measurement electrode having an active surface; at least one guard made from an electrically conductive material placed adjacent to the measurement electrode(s), the guard being excited up to an alternating electric potential substantially identical to that of the measurement electrodes; and a first electronic device for exciting the electrode(s) and processing the measurement signals from the capacitive coupling of the electrode(s) to an object placed adjacent thereto, the electronic device being at least partially referenced to the electric potential of the guard. The measurement device further includes apparatus for performing another function, placed adjacent to the active surface, and a second electronic device provided for monitoring the apparatus for performing another function, the second electronic device being at least partially referenced to the electric potential of the guard.
    Type: Application
    Filed: August 6, 2010
    Publication date: July 26, 2012
    Inventor: Didier Roziere
  • Patent number: 8228077
    Abstract: An Anti-pinch sensor, in particular for detecting an obstacle in the path of an actuator of a motor vehicle is provided. The anti-pinch sensor includes a first measurement electrode and a second electrically isolated measurement electrode spaced a distance from the first measurement electrode, wherein the first measurement electrode is designed to generate an external electric field with respect to the second measurement electrode, and wherein the first and second measurement electrodes are elastically supported relative to an electrically isolated ground electrode. In addition, a sensor device having such an anti-pinch sensor is disclosed. The anti-pinch sensor is suitable as both a contactless and a tactile sensor. Detection of surface deposits of contaminants or water is easily possible.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: July 24, 2012
    Assignee: Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Hallstadt
    Inventors: Holger Wuerstlein, Thomas Weingaertner
  • Patent number: 8164354
    Abstract: Proximity sensing arrangements utilize one or more sensing devices to detect and/or to discern objects that are or become proximate, or are expected to be proximate to a position of interest. For example, one or more capacitive sensors may be distributed to locations about a machine, e.g., attached to, incorporated with, or otherwise associated with a moving or otherwise operating component of the machine. Corresponding control electronics drive each capacitive sensor, using a corresponding excitation signal, as well as process information read from each capacitive sensor to make intelligent proximity related decisions.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: April 24, 2012
    Assignee: Process Equipment Co. of Tipp City
    Inventor: Robert G. Lenz
  • Patent number: 8149002
    Abstract: A device for capacitive measurement by a floating bridge, including: a sensor module including at least one measuring electrode and at least one guard electrode arranged close to a target connected to a general earth, at least one integrated circuit for capacitive measurement, provided with a guard to which the guard electrode is connected, having an input connected to the measuring electrode, a guard connected to the reference earth of the integrated circuit, an excitation output connected to the general earth, a measurement output, and structure for supplying the integrated circuit for capacitive measurement in floating mode.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: April 3, 2012
    Assignee: Nanotec Solution
    Inventors: Frédéric Ossart, Didier Roziere
  • Publication number: 20110254572
    Abstract: To measure the distance between a sensing target and sensors accurately by suppressing differences in amount of change in outputs from sensors and differences in initial capacitances thereof and detect the sensing target highly accurately, capacitance-type sensor includes: sensor electrodes configuring a sensor electrode group; and a pair of guard electrodes. The sensor electrodes are driven being supplied with a sensor potential or a guard potential, and the guard electrodes are driven being supplied with the guard potential. Even when the outermost sensor electrode of the sensor electrode group is activated, the amount of change in the outputs from the sensor electrodes configuring the sensor electrode group and their capacitance values can be made substantially uniform because the guard electrodes are driven at the guard potential.
    Type: Application
    Filed: April 29, 2011
    Publication date: October 20, 2011
    Applicant: FUJIKURA LTD.
    Inventors: Yuichiro Yamaguchi, Koichi Ichihara, Ryohei Sakurai
  • Patent number: 7999562
    Abstract: An operator detection and presence device includes a conductive sensor and a guard electrode. The sensor and electrode are physically located and electrically connected in a manner which helps the detection circuit measure if an operator's hand is on the handle or if the change in capacitance is due to water. The sensor and electrode are preferably physically located in the handle spaced apart from one another, where the sensor is located in an area that the operator will touch. The electrode is located in an area that the operator will not generally touch. A detection circuit is connected to the sensor and electrode for measuring whether the capacitance of the sensor has changed. The electrode is used to avoid false detections and/or the ability to detect of operator presence.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: August 16, 2011
    Assignee: Vermeer Manufacturing Company
    Inventors: Yuriy Khapochkin, Hans Kelpe
  • Publication number: 20110193574
    Abstract: A capacitive sensing system, comprising a sensor having thin film structure, the thin film structure comprising a sensor having a first insulating layer and a first conductive film comprising a sensing electrode formed on a first surface of the first insulating layer and a second conductive film comprising a back guard electrode. The back guard electrode is formed in a single plane and comprises a peripheral portion in the same plane, and is disposed on a second surface of the first insulating layer and a first surface of a second insulating layer or protective layer. The peripheral portion of the back guard electrode extends beyond the sensing electrode to form a side guard electrode which substantially or completely surrounds the sensing electrode.
    Type: Application
    Filed: December 23, 2010
    Publication date: August 11, 2011
    Applicant: Mapper Lithography IP B.V.
    Inventors: Guido DE BOER, Johnny Joannes Jacobus Van Baar, Kaustubh Prabodh Padhye, Robert Mossel, Niels Vergeer, Stijn Willem Herman Karel Steenbrink
  • Patent number: 7973542
    Abstract: Methods, systems and devices are described for determining a measurable capacitance for proximity detection in a sensor having a plurality of sensing electrodes and at least one guarding electrode. A charge transfer process is executed for at least two executions. The charge transfer process includes applying a pre-determined voltage to at least one of the plurality of sensing electrodes using a first switch, applying a first guard voltage to the at least one guarding electrode using a second switch, sharing charge between the at least one of the plurality of sensing electrodes and a filter capacitance, and applying a second guard voltage different from the first guard voltage to the at least one guarding electrode. A voltage is measured on the filter capacitance for a number of measurements equal to at least one to produce at least one result to determine the measurable capacitance for proximity detection.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: July 5, 2011
    Assignee: Synaptics Incorporated
    Inventor: Joseph Kurth Reynolds