Patents by Inventor David GILLSJÖ

David GILLSJÖ 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).

  • Stylus identification
    Patent number: 11301089
    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 operate an image reconstruction algorithm on at least part of the thus-generated transmission values and determine a position of a touching object on the touch surface, and an attenuation value corresponding to the attenuation of the light resulting from the object touching the touch surface. Using these values, the processor is configured to identify the type of object.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: April 12, 2022
    Assignee: FlatFrog Laboratories AB
    Inventors: Tomas Christiansson, Mattias Krus, Kristofer Jacobson, David Gillsjö
  • STYLUS IDENTIFICATION
    Publication number: 20210103356
    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 operate an image reconstruction algorithm on at least part of the thus-generated transmission values and determine a position of a touching object on the touch surface, and an attenuation value corresponding to the attenuation of the light resulting from the object touching the touch surface. Using these values, the processor is configured to identify the type of object.
    Type: Application
    Filed: September 14, 2020
    Publication date: April 8, 2021
    Inventors: Tomas CHRISTIANSSON, Mattias KRUS, Kristofer JACOBSON, David GILLSJÖ
  • Stylus identification
    Patent number: 10775937
    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 operate an image reconstruction algorithm on at least part of the thus-generated transmission values and determine a position of a touching object on the touch surface, and an attenuation value corresponding to the attenuation of the light resulting from the object touching the touch surface. Using these values, the processor is configured to identify the type of object.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: September 15, 2020
    Assignee: FlatFrog Laboratories AB
    Inventors: Tomas Christiansson, Mattias Krus, Kristofer Jacobson, David Gillsjö
  • IMPROVED STYLUS IDENTIFICATION
    Publication number: 20180356940
    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 operate an image reconstruction algorithm on at least part of the thus-generated transmission values and determine a position of a touching object on the touch surface, and an attenuation value corresponding to the attenuation of the light resulting from the object touching the touch surface. Using these values, the processor is configured to identify the type of object.
    Type: Application
    Filed: December 7, 2016
    Publication date: December 13, 2018
    Inventors: Tomas CHRISTIANSSON, Mattias KRUS, Kristofer JACOBSON, David GILLSJÖ