Patents by Inventor Michael Lehmann

Michael Lehmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20140232191
    Abstract: A contact line system is provided for traction supply of an electrical tractive vehicle. It contains a contact line being contacted by a current consumer of the tractive vehicle for energy transmission. It further contains a central substation for converting a supply voltage into a contact line voltage which is electrically connected to the contact line via a section exit for supplying of energy. It additionally contains a protection device for interrupting the energy supply upon recognizing a failure which has a central measurement device for measuring a parameter in the section exit and an evaluation device for recognizing a failure. The protection device has decentrally arranged measurement units for detecting parameters outside of the substation and a data transmission system for transmitting parameter measurement values to the evaluation device. The evaluation device evaluates the decentrally detected parameter measurement values for failure recognition.
    Type: Application
    Filed: September 5, 2012
    Publication date: August 21, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Aandre Doelling, Michael Lehmann, Stephan Rister, Axel Schmieder
  • Publication number: 20140203389
    Abstract: A pixel is formed in a semiconductor substrate (S) with a plane surface for use in a photodetector. It comprises an active region for converting incident light (In) into charge carriers, photogates (PGL, PGM, PGR) for generating a lateral electric potential (?(x)) across the active region, and an integration gate (IG) for storing charge carriers generated in the active region and a dump site (Ddiff). The pixel further comprises separation-enhancing means (SL) for additionally enhancing charge separation in the active region and charge transport from the active region to the integration gate (IG). The separation-enhancing means (SL) are for instance a shield layer designed such that for a given lateral electric potential (?(x)), the incident light (In) does not impinge on the section from which the charge carriers would not be transported to the integration gate (IG).
    Type: Application
    Filed: January 22, 2014
    Publication date: July 24, 2014
    Applicant: MESA Imaging AG
    Inventors: Simon Neukom, Michael Lehmann, Rolf Kaufmann, Thierry Oggier
  • Patent number: 8760549
    Abstract: A demodulation pixel architecture allows for demodulating an incoming modulated electromagnetic wave, normally visible or infrared light. It is based on a charge coupled device (CCD) line connected to a drift field structure. The drift field is exposed to the incoming light. It collects the generated charge and forces it to move to the pick-up point. At this pick-up point, the CCD element samples the charge for a given time and then shifts the charge packets further on in the daisy chain. After a certain amount of shifts, the multiple charge packets are stored in so-called integration gates, in a preferred embodiment. The number of integration gates gives the number of simultaneously available taps. When the cycle is repeated several times, the charge is accumulated in the integration gates and thus the signal-to-noise ratio increases. The architecture is flexible in the number of taps. A dump node can be attached to the CCD line for dumping charge with the same speed as the samples are taken.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: June 24, 2014
    Assignee: MESA Imaging AG
    Inventors: Michael Lehmann, Bernhard Buttgen
  • Patent number: 8754939
    Abstract: A demodulation structure for a n-tap pixel, mainly for 3D time-of-flight (TOF) applications uses a 2-stage switch structure for demodulating a modulated electromagnetic wave. An almost arbitrary number of storage sites per pixel can be implemented enabling an almost arbitrary number of samplings captured during one exposure. It also provides the option to demodulate and integrate different phasing samples according to the different modulation frequencies within the same exposure.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: June 17, 2014
    Assignee: MESA imaging AG
    Inventors: Thierry Oggier, Michael Lehmann, Bernhard Buettgen, Jonas Felber
  • Publication number: 20130248938
    Abstract: A novel photo-sensitive element for electronic imaging purposes and, in this context, is particularly suited for time-of-flight 3D imaging sensor pixels. The element enables charge-domain photo-detection and processing based on a single gate architecture. Certain regions for n and p-doping implants of the gates are defined. This kind of single gate architecture enables low noise photon detection and high-speed charge transport methods at the same time. A strong benefit compared to known pixel structures is that no special processing steps are required such as overlapping gate structures or very high-ohmic poly-silicon deposition. In this sense, the element relaxes the processing methods so that this device may be integrated by the use of standard CMOS technology for example. Regarding time-of-flight pixel technology, a major challenge is the generation of lateral electric fields. The element allows the generation of fringing fields and large lateral electric fields.
    Type: Application
    Filed: March 20, 2013
    Publication date: September 26, 2013
    Inventors: Bernhard Buettgen, Michael Lehmann, Bruno Vaello
  • Patent number: 8490656
    Abstract: A weaving apparatus includes a weaving machine and a shedding machine that carries out activatable and deactivatable movements of the shedding devices with a shedding drive that is controlled independently of a weaving drive of the weaving machine. After detection of an operating malfunction, e.g. a weft fault or a warp fault, the shedding devices are controlled such that measures for eliminating the operating malfunction can be carried out. In that regard, the rotational speed of the weaving machine is reduced, but the shedding machine is further operated at a relatively high rotational speed, preferably without stopping the shedding machine while the malfunction is eliminated. Then, the speed of the weaving machine is increased and again essentially synchronized with the shedding machine, to resume the regular weaving operation.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: July 23, 2013
    Assignee: Lindauer DORNIER Gesellschaft mbH
    Inventor: Michael Lehmann
  • Patent number: 8106472
    Abstract: The pixel for use in an image sensor comprises a low-doped semiconductor substrate (A). On the substrate (A), an arrangement of a plurality of floating areas, e.g., floating gates (FG2-FG6), is provided. Neighboring floating gates are electrically isolated from each other yet capacitively coupled to each other. By applying a voltage (V2?V1) to two contact areas (FG1, FG7), a lateral steplike electric field is generated. Photogenerated charge carriers move along the electric-field lines to the point of highest potential energy, where a floating diffusion (D) accumulate the photocharges. The charges accumulated in the various pixels are sequentially read out with a suitable circuit known from image-sensor literature, such as a source follower or a charge amplifier with row and column select mechanisms. The pixel of offers at the same time a large sensing area, a high photocharge-detection sensitivity and a high response speed, without any static current consumption.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: January 31, 2012
    Assignee: MESA Imaging AG
    Inventors: Rolf Kaufmann, Michael Lehmann, Peter Seitz
  • Patent number: 8080952
    Abstract: A method and apparatus for an automated waste receptacle includes a waste flap, a motor positioned on a side of the waste flap and an actuator located in proximity of the top side of the waste flap. The actuator is configured to operate the motor and subsequently move the flap between open and closed positions.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: December 20, 2011
    Assignee: Adams Rite Aerospace, Inc.
    Inventors: Abbas Lotfi, Michael Lehmann
  • Publication number: 20110290368
    Abstract: The invention relates to a weaving machine with a shedding machine, which comprises activatable and deactivatable movements of the shedding means with a drive which is controlled independently of a drive of the weaving machine. During an operating malfunction the shedding means are controlled (N, N+1) in such a manner so that measures for eliminating the operating malfunction can be carried out. In that regard, merely the rotational speed of the weaving machine (n1.1) is reduced, while the shedding machine is further operated with a high working rotational speed (n1.2) and, if applicable without stopping, is again transitioned into the regular weaving operation, so that the time for the elimination of the operating malfunction is shortened and weaving errors are avoided.
    Type: Application
    Filed: March 6, 2009
    Publication date: December 1, 2011
    Applicant: LINDAUER DORNIER GESELLSCHAFT MBH
    Inventor: Michael Lehmann
  • Publication number: 20110273561
    Abstract: A demodulation structure for a n-tap pixel, mainly for 3D time-of-flight (TOF) applications uses a 2-stage switch structure for demodulating a modulated electromagnetic wave. An almost arbitrary number of storage sites per pixel can be implemented enabling an almost arbitrary number of samplings captured during one exposure. It also provides the option to demodulate and integrate different phasing samples according to the different modulation frequencies within the same exposure.
    Type: Application
    Filed: November 9, 2010
    Publication date: November 10, 2011
    Applicant: MESA IMAGING AG
    Inventors: Thierry Oggier, Michael Lehmann, Bernhard Buettgen, Jonas Felber
  • Publication number: 20110201262
    Abstract: A system for monitoring pressure change within at least one compartment of an aircraft is provided. The system includes a primary pressure sensor for providing a signal corresponding to a pressure within a primary compartment of the aircraft, a primary monitoring channel coupled to the primary pressure sensor, and an output driver coupled to the primary monitoring channel. The primary monitoring channel includes a band pass filter for receiving and filtering the primary pressure signal, a pressure change circuit for determining a change in the filtered pressure signal and for providing a pressure change output signal corresponding to the change in pressure, and a threshold logic circuit for determining whether the pressure change output signal meets a predetermined threshold and for providing a threshold output signal indicating that a decompression event has occurred if the pressure change output signal meets the predetermined threshold.
    Type: Application
    Filed: March 9, 2009
    Publication date: August 18, 2011
    Applicant: ADAMS RITE AEROSPACE
    Inventor: Michael Lehmann
  • Publication number: 20110114821
    Abstract: The presented readout structure provides charge transport based readout of a photosensitive device with a minimum number of transport gates. The structure uses the given charge storage buckets of the photosensitive device, separated by a minimum sized barrier-gate, to transport the charge out of the pixel field. This new readout schema allows for a fast readout speed based on a 2 phase transport chain and increases the pixel's optical fill factor by significantly reducing the transport gate size compared to state-of-the-art pixels using a 3 or 4 phase CCD readout chain. This readout structure can be exploited for standard photo-detecting elements such as e.g. pinned photo-diodes or any enhanced pixel structure that has additional intelligence incorporated as well. Typical applications are 2D- or 3D-imaging.
    Type: Application
    Filed: May 5, 2010
    Publication date: May 19, 2011
    Applicant: MESA Imaging AG
    Inventors: Jonas Felber, Michael Lehmann, Berhard Buettgen
  • Publication number: 20110101241
    Abstract: A pixel is formed in a semiconductor substrate (S) with a plane surface for use in a photodetector. It comprises an active region for converting incident light (In) into charge carriers, photogates (PGL, PGM, PGR) for generating a lateral electric potential (?(x)) across the active region, and an integration gate (IG) for storing charge carriers generated in the active region and a dump site (Ddiff). The pixel further comprises separation-enhancing means (SL) for additionally enhancing charge separation in the active region and charge transport from the active region to the integration gate (IG). The separation-enhancing means (SL) are for instance a shield layer designed such that for a given lateral electric potential (?(x)), the incident light (In) does not impinge on the section from which the charge carriers would not be transported to the integration gate (IG).
    Type: Application
    Filed: January 10, 2011
    Publication date: May 5, 2011
    Applicant: MESA IMAGING AG
    Inventors: Kaspar Cottier, Rolf Kaufmann, Rino E. Kunz, Thierry Oggier, Guy Voirin, Simon Neukom, Michael Lehmann
  • Publication number: 20110089471
    Abstract: A demodulation pixel improves the charge transport speed and sensitivity by exploiting two effects of charge transport in silicon in order to achieve the before-mentioned optimization. The first one is a transport method based on the CCD gate principle. However, this is not limited to CCD technology, but can be realized also in CMOS technology. The charge transport in a surface or even a buried channel close to the surface is highly efficient in terms of speed, sensitivity and low trapping noise. In addition, by activating a majority carrier current flowing through the substrate, another drift field is generated below the depleted CCD channel. This drift field is located deeply in the substrate, acting as an efficient separator for deeply photo-generated electron-hole pairs. Thus, another large amount of minority carriers is transported to the diffusion nodes at high speed and detected.
    Type: Application
    Filed: August 16, 2010
    Publication date: April 21, 2011
    Applicant: MESA IMAGING AG
    Inventors: Bernhard Buettgen, Jonas Felber, Michael Lehmann, Thierry Oggier
  • Patent number: 7897928
    Abstract: A pixel is formed in a semiconductor substrate (S) with a plane surface for use in a photodetector. It comprises an active region for converting incident light (In) into charge carriers, photogates (PGL, PGM, PGR) for generating a lateral electric potential (?(x)) across the active region, and an integration gate (IG) for storing charge carriers generated in the active region and a dump site (Ddiff). The pixel further comprises separation-enhancing means (SL) for additionally enhancing charge separation in the active region and charge transport from the active region to the integration gate (IG). The separation-enhancing means (SL) are for instance a shield layer designed such that for a given lateral electric potential (?(x)), the incident light (In) does not impinge on the section from which the charge carriers would not be transported to the integration gate (IG).
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: March 1, 2011
    Assignee: MESA Imaging AG
    Inventors: Rolf Kaufmann, Thierry Oggier, Simon Neukom, Michael Lehmann
  • Patent number: 7889257
    Abstract: An integrated sensor chip comprises at least one pixel. The at least one pixel comprises: one or several integration regions for receiving and storing photogenerated charges; a modulation region that moves the photogenerated charges to be stored in the at least two integration regions; and sense nodes, in which each of the sense nodes is associated with one of the integration regions, into which the photogenerated charges are moved from the integration regions during a readout stage.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: February 15, 2011
    Assignee: MESA Imaging AG
    Inventors: Thierry Oggier, Michael Lehmann, Bernhard Buettgen
  • Publication number: 20100308209
    Abstract: A method and system enable the subtraction of charge carrier packages in the low-noise charge domain, which is particularly interesting for the operation of demodulation pixels when high background light signals are present. The method comprises the following steps: demodulation of an optical signal and integration of the photo-generated charge carriers; charge transfer to an external capacitance. The second step means a recombination of electrons and holes in the charge domain and an influencing of the opposite charge carriers on the second plate of the capacitance. This approach allows for low-noise subtraction of charge packages in the charge domain and, at the same time, for creating pixels with much higher fill factors because the capacitances can be optimized for storing just the differential parts, without the DC component.
    Type: Application
    Filed: June 9, 2010
    Publication date: December 9, 2010
    Applicant: MESA IMAGING AG
    Inventors: Berhard Buettgen, Michael Lehmann, Jonas Felber
  • Publication number: 20100193666
    Abstract: The pixel for use in an image sensor comprises a low-doped semiconductor substrate (A). On the substrate (A), an arrangement of a plurality of floating areas, e.g., floating gates (FG2-FG6), is provided. Neighboring floating gates are electrically isolated from each other yet capacitively coupled to each other. By applying a voltage (V2?V1) to two contact areas (FG1, FG7), a lateral steplike electric field is generated. Photogenerated charge carriers move along the electric-field lines to the point of highest potential energy, where a floating diffusion (D) accumulate the photocharges. The charges accumulated in the various pixels are sequentially read out with a suitable circuit known from image-sensor literature, such as a source follower or a charge amplifier with row and column select mechanisms. The pixel of offers at the same time a large sensing area, a high photocharge-detection sensitivity and a high response speed, without any static current consumption.
    Type: Application
    Filed: February 9, 2010
    Publication date: August 5, 2010
    Applicant: MESA IMAGING AG
    Inventors: Rolf Kaufmann, Michael Lehmann, Peter Seitz
  • Patent number: 7701028
    Abstract: The pixel for use in an image sensor comprises a low-doped semiconductor substrate (A). On the substrate (A), an arrangement of a plurality of floating areas e.g., floating gates (FG2-FG6), is provided. Neighboring floating gates are electrically isolated from each other yet capacitively coupled to each other. By applying a voltage (V2-V1) to two contact areas (FG1, FG7), a lateral steplike electric field is generated. Photogenerated charge carriers move along the electric-field lines to the point of highest potential energy, where a floating diffusion (D) accumulate the photocharges. The charges accumulated in the various pixels are sequentially read out with a suitable circuit known from image-sensor literature, such as a source follower or a charge amplifier with row and column select mechanisms. The pixel of offers at the same time a large sensing area, a high photocharge-detection sensitivity and a high response speed without any static current consumption.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: April 20, 2010
    Assignee: MESA Imaging AG
    Inventors: Rolf Kaufmann, Michael Lehmann, Peter Seitz
  • Publication number: 20100053405
    Abstract: A demodulation pixel architecture allows for demodulating an incoming modulated electromagnetic wave, normally visible or infrared light. It is based on a charge coupled device (CCD) line connected to a drift field structure. The drift field is exposed to the incoming light. It collects the generated charge and forces it to move to the pick-up point. At this pick-up point, the CCD element samples the charge for a given time and then shifts the charge packets further on in the daisy chain. After a certain amount of shifts, the multiple charge packets are stored in so-called integration gates, in a preferred embodiment. The number of integration gates gives the number of simultaneously available taps. When the cycle is repeated several times, the charge is accumulated in the integration gates and thus the signal-to-noise ratio increases. The architecture is flexible in the number of taps. A dump node can be attached to the CCD line for dumping charge with the same speed as the samples are taken.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 4, 2010
    Applicant: MESA IMAGING AG
    Inventors: Michael Lehmann, Bernhard Buettgen