Patents by Inventor Tomas OHLSSON

Tomas OHLSSON 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).

  • Patent number: 10761657
    Abstract: A method of operating an optical touch apparatus is described wherein, the optical touch apparatus comprising a panel, a plurality of emitters and a plurality of detectors arranged with respect to the panel, the plurality of detectors configured to receive light from the plurality of emitters thereby defining detection samples of light transmitted between pairs of emitters and detectors. The optical touch apparatus being further configured to operate in an ambient light evaluation mode comprising the steps of: generating a first set of samples over a first integration time and a second set of samples over a second integration time using at least one detector, and applying a filter to at least the first and second set of samples to generate a residual ambient light value indicative of ambient light noise, wherein the touch apparatus is configured to perform the following steps: operating according to the ambient light evaluation mode for a plurality of repetitions.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: September 1, 2020
    Assignee: FlatFrog Laboratories AB
    Inventors: Tomas Christiansson, Henrik Wall, Nicklas Ohlsson, Mattias Krus, Tomas Svensson
  • Publication number: 20200170597
    Abstract: An apparatus for radiopharmaceutical quantification of a body part includes a processor configured to receive at least one gamma image of a body part acquired by at least one gamma camera configured to detect gamma and/or X-rays. The at least one gamma image comprises spectral energy data that includes data resulting from decay of at least one radiopharmaceutical. The processor is configured to determine an activity of the at least one radiopharmaceutical at a plurality of spatial positions in the body part and determines a spatial distribution of the at least one radiopharmaceutical in the body part. The determination for a spatial position of the plurality of spatial positions comprises correlating a generated synthetic spectrum to an experimental spectrum generated from the spectral energy data for at least one position in the at least one gamma image that corresponds to that spatial position.
    Type: Application
    Filed: July 23, 2018
    Publication date: June 4, 2020
    Applicant: Bayer Aktiengesellschaft
    Inventors: Cecilia HINDORF, Erik LARSSON, Gustav BROLIN, Tomas OHLSSON
  • Patent number: 10606414
    Abstract: An optical IR touch sensing apparatus configured to determine, based on output signals of light detectors, a light energy value for each light path across a touch surface, and generate a transmission value for each light path based on the light energy value. A processor is then configured to process the transmission values to determine an object reference point on the touch surface where the light is attenuated or occluded by an object and determine, from a set of light paths unaffected by an object, a set of object boundary light paths comprising one or more light paths passing closest to the object reference point. The characteristics of the object may then be determined in dependence on the set of object boundary light paths.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: March 31, 2020
    Assignee: FlatFrog Laboratories AB
    Inventors: Tomas Christiansson, Kristofer Jakobson, Nicklas Ohlsson
  • Publication number: 20190317640
    Abstract: A method of operating an optical touch apparatus is described wherein, the optical touch apparatus comprising a panel, a plurality of emitters and a plurality of detectors arranged with respect to the panel, the plurality of detectors configured to receive light from the plurality of emitters thereby defining detection samples of light transmitted between pairs of emitters and detectors. The optical touch apparatus being further configured to operate in an ambient light evaluation mode comprising the steps of: generating a first set of samples over a first integration time and a second set of samples over a second integration time using at least one detector, and applying a filter to at least the first and second set of samples to generate a residual ambient light value indicative of ambient light noise, wherein the touch apparatus is configured to perform the following steps: operating according to the ambient light evaluation mode for a plurality of repetitions.
    Type: Application
    Filed: November 17, 2017
    Publication date: October 17, 2019
    Inventors: Tomas CHRISTIANSSON, Henrik WALL, Nicklas Ohlsson, Mattias KRUS, Tomas SVENSSON
  • Patent number: 10372265
    Abstract: Touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, along detection lines across a touch surface. A signal processor operates in a sequence of repetitions to: generate data samples that represent detected signal energy on the actual detection lines; generate based on the data samples, an interpolated sinogram comprising interpolation samples that represent fictitious detection lines which have a desired location on the touch surface; and reconstruct a signal interaction pattern for the touch surface based on the interpolated sinogram. The signal processor implements an error correction to counteract the influence of a change in validity status for a data sample among the data samples, by identifying interpolation samples affected by the change in validity status, and by setting each identified interpolation sample to a value that maintains a relative signal transmission of the fictitious detection line from a former repetition.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: August 6, 2019
    Assignee: FlatFrog Laboratories AB
    Inventors: Tomas Christiansson, Andreas Bjorklund, Mats Petter Wallander, Nicklas Ohlsson
  • Patent number: 10318041
    Abstract: A signal processor implements a technique for detecting objects on a panel which transmits signals inside the panel such that the objects are allowed to interact with (e.g. attenuate) the signals by contact with a touch surface of the panel. The signal processor operates to define cells that have a given location on the touch surface and are associated with a respective set of intersecting paths for the signals across the touch surface. The signal processor operates to obtain (90) an output signal from a signal detection arrangement that measures a signal property for each path; process (91) the output signal to obtain an interaction value for each path; and generate (93-95?) a cell value of a selected cell among the cells as either a robust measure of central tendency (e.g. a median) or a minimum/maximum among the interaction values for the intersecting paths. The signal processor determines (97) presence or absence of an object in the selected cell based on the cell value.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: June 11, 2019
    Assignee: FlatFrog Laboratories AB
    Inventors: Andreas Björklund, Tomas Christiansson, Mats Petter Wallander, Nicklas Ohlsson