Patents by Inventor Stefan Lindgren

Stefan Lindgren 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: 11252320
    Abstract: A method for determining whether a video camera is out-of-focus comprises: capturing image data; setting a focus setting difference threshold based on a filter function configured to filter the image data; adjusting a focus setting between a present focus setting and an altered focus setting such that a first subset of the image data is captured with the video camera being set in the present focus setting and such that a second subset of the image data is captured with the video camera being set in the altered focus setting, wherein the adjusting is performed such that a difference between the present and altered focus settings is below the threshold; forming the video stream by applying the filter function on the image data; determining first and second focus metrics of the image data; and determining whether the video camera is out-of-focus by comparing the first and second focus metrics.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: February 15, 2022
    Inventors: Johan Jeppsson, Björn Benderius, Niclas Svensson, Fritjof Jonsson, Jonas Levin, Stefan Lindgren
  • Publication number: 20210281738
    Abstract: A method for determining whether a video camera is out-of-focus comprises: capturing image data; setting a focus setting difference threshold based on a filter function configured to filter the image data; adjusting a focus setting between a present focus setting and an altered focus setting such that a first subset of the image data is captured with the video camera being set in the present focus setting and such that a second subset of the image data is captured with the video camera being set in the altered focus setting, wherein the adjusting is performed such that a difference between the present and altered focus settings is below the threshold; forming the video stream by applying the filter function on the image data; determining first and second focus metrics of the image data; and determining whether the video camera is out-of-focus by comparing the first and second focus metrics.
    Type: Application
    Filed: March 8, 2021
    Publication date: September 9, 2021
    Applicant: Axis AB
    Inventors: Johan JEPPSSON, Björn BENDERIUS, Niclas SVENSSON, Fritjof JONSSON, Jonas LEVIN, Stefan LINDGREN
  • Patent number: 9420966
    Abstract: A measuring system for measuring the concentration of substances or analytes in a body fluid or in a body tissue comprises a microdialysis probe comprising a microdialysis membrane, the probe being adapted to be placed in blood or in tissue, a flow through sensor for analyzing a fluid having passed the microdialysis probe, a pump for pumping the fluid to and through the microdialysis probe and further to and through the sensor, and tubing connecting the pump to the microdialysis probe and the microdialysis probe to the sensor. The pump effects a flow rate in the system in the interval 0.2-15 microliters per minute. The sensor comprises a flow channel having a flow resistance or pressure drop adapted to the characteristics of the microdialysis membrane so as to eliminate, or at least substantially reduce, ultra filtering in the microdialysis membrane.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: August 23, 2016
    Assignee: MAQUET CRITICAL CARE AB
    Inventors: Stefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
  • Patent number: 9101304
    Abstract: A measuring system (100) for continuously measuring body fluid constituents, said measuring system (100) comprising a microdialysis catheter or probe (110) comprising a microdialysis membrane (116) to be placed in a blood stream or in tissue fluid. The measuring system further comprises a flow through sensor (200) for continuously measuring the concentration of substances present in the fluid that has passed the microdialysis membrane (116). The measuring system (100) further comprises a waste container (126).
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: August 11, 2015
    Assignee: Maquet Critical Care AB
    Inventors: Stefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
  • Publication number: 20150148639
    Abstract: A measuring system for measuring the concentration of substances or analytes in a body fluid or in a body tissue comprises a microdialysis probe comprising a microdialysis membrane, the probe being adapted to be placed in blood or in tissue, a flow through sensor for analysing a fluid having passed the microdialysis probe, a pump for pumping the fluid to and through the microdialysis probe and further to and through the sensor, and tubing connecting the pump to the microdialysis probe and the microdialysis probe to the sensor. The pump effects a flow rate in the system in the interval 0.2-15 microliters per minute. The sensor comprises a flow channel having a flow resistance or pressure drop adapted to the characteristics of the microdialysis membrane so as to eliminate, or at least substantially reduce, ultra filtering in the microdialysis membrane.
    Type: Application
    Filed: February 2, 2015
    Publication date: May 28, 2015
    Inventors: Stefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
  • Patent number: 8483121
    Abstract: The present invention relates to a method for energy saving in a telecommunication system with at least one first base station 24 for enabling communication within a first cell. A signal having a frame structure is transmitted in the first cell by the first base station 24. The structure of at least some frames comprises an overhead part with at least synchronization or system information. The first base station 24 is in a normal mode operated to transmit at least the overhead part so that it substantially reaches all user terminals within the first cell covering a first area 27. The method is particularly characterized in that the first base station 24 in a power saving mode is operated to transmit at least the overhead part so that it substantially reaches all user terminals within the first cell covering a second area 23 being larger than the first area 27.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: July 9, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Stefan Lindgren, Sten Sjöberg
  • Patent number: 8331276
    Abstract: A signal having a frame structure is transmitted and received in a cell by a first base station, the structure of the frame having a downlink frame part and an uplink frame part. Each frame part has the ability of carrying at least one data region allocated to at least one user or broadcasted for the traffic flow between the telecommunication network and the user terminal via the first base station. The downlink frame part has an overhead part with at least synchronization or system information. The frame structured signal is transmitted periodically Frame N, Frame N+1, Frame N+2, Frame N+3 with a normal interval defined by the system. The system during, a power saving mode, increases the interval between at least a first and the next following second frame structured signal to a power saving interval.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: December 11, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Lindgren, Sten Sjöberg Sjöberg
  • Patent number: 8195945
    Abstract: A method for storing and updating digital certificates in a flash memory, a flash memory, and an electronic apparatus exploiting the method are disclosed. The method is applicable for a flash memory having predefined erase-write blocks and write-read blocks, for enhancing the tampering proof characteristics of the flash memory. The certificates may be used to authenticate a computer program and may be verified by a verification program associated with the computer program. The method may include defining a plurality of memory slots within at least one erased erase-write block wherein each memory slot have a commencing address comprising a binary “0”- or a binary “1” bit pattern, writing a first and second digital certificate in a first and second one of the memory slots, defining a certificate slot address pointer, and updating the certificate slot address pointer by replacing said “0”- or “1”-bit pattern of the pointer with a “1”- or a “0” bit pattern, respectively.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: June 5, 2012
    Assignee: Sony Mobile Communications AB
    Inventors: Stefan Andersson, Werner Johansson, Stefan Lindgren
  • Publication number: 20110213230
    Abstract: A measuring system (100) for continuously measuring body fluid constituents, said measuring system (100) comprising a microdialysis catheter or probe (110) comprising a microdialysis membrane (116) to be placed in a blood stream or in tissue fluid. The measuring system further comprises a flow through sensor (200) for continuously measuring the concentration of substances present in the fluid that has passed the microdialysis membrane (116). The measuring system (100) further comprises a waste container (126).
    Type: Application
    Filed: July 2, 2009
    Publication date: September 1, 2011
    Inventors: Stefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
  • Publication number: 20100331727
    Abstract: There is provided a linear device (100) for microdialysis, comprising a length of tubing (102) having at least one lumen (118) wherein at least one tubular membrane sleeve (104) is coaxially arranged outside the tubing periphery and extending at least partially along the periphery of the tubing (102). The membrane sleeve (104) is extending intermediate the ends of the tubing (102), and the tubing (102) extends at least through the tubular membrane sleeve (104). There is also provided a method of manufacturing the linear device (100) and a method wherein the linear device (100) is used.
    Type: Application
    Filed: July 9, 2008
    Publication date: December 30, 2010
    Inventors: Stefan Lindgren, Anton Karlsson
  • Publication number: 20100267333
    Abstract: The present invention is directed to a method and a node arrangement for extending the cell range in a wireless communication system, which communication system comprises a communication network arranged to operatively communicate with at least one mobile terminal via an air interface having a cell range extending to a cell edge, and at least one mobile terminal arranged to operatively communicate with said communication network via said air interface. The method comprises the steps of: obtaining information about the condition of an up-link signal from said at least one mobile terminal; determining whether said terminal is located at or near the cell edge, and extending the cell range by increasing the time for up-link transmission if the terminal is located at or near the cell edge.
    Type: Application
    Filed: December 20, 2007
    Publication date: October 21, 2010
    Inventors: Anders Lamm, Stefan Lindgren, Sten Sjöberg, Shiau-He Tsai
  • Publication number: 20100246462
    Abstract: The present invention relates to a method for energy saving in a telecommunication system with at least one first base station 24 for enabling communication within a first cell. A signal having a frame structure is transmitted in the first cell by the first base station 24. The structure of at least some frames comprises an overhead part with at least synchronization or system information. The first base station 24 is in a normal mode operated to transmit at least the overhead part so that it substantially reaches all user terminals within the first cell covering a first area 27. The method is particularly characterized in that the first base station 24 in a power saving mode is operated to transmit at least the overhead part so that it substantially reaches all user terminals within the first cell covering a second area 23 being larger than the first area 27.
    Type: Application
    Filed: September 5, 2007
    Publication date: September 30, 2010
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON
    Inventors: Stefan Lindgren, Sten Sjöberg
  • Publication number: 20100214969
    Abstract: A base station for use in a WiMAX system comprise means for sending a wake-up signal to an idle terminal to indicate to the terminal that a paging signal is about to be sent to the terminal. The terminal receives and interprets the wake-up signal and prepares itself for receiving the paging signal. This saves battery power in the terminal since the wake-up signal can be detected more easily than the paging signal. The base station, in the mean time, can reduce its paging message traffic and saves overhead in downlink transmission.
    Type: Application
    Filed: May 3, 2007
    Publication date: August 26, 2010
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Anders Lamm, Stefan Lindgren, Shiau-He Shawn Tsai
  • Publication number: 20100189023
    Abstract: A signal having a frame structure is transmitted and received in a cell by a first base station, the structure of the frame having a downlink frame part and an uplink frame part. Each frame part has the ability of carrying at least one data region allocated to at least one user or broadcasted for the traffic flow between the telecommunication network and the user terminal via the first base station. The downlink frame part has an overhead part with at least synchronization or system information. The frame structured signal is transmitted periodically Frame N, Frame N+1, Frame N+2, Frame N+3 with a normal interval defined by the system. The system during, a power saving mode, increases the interval between at least a first and the next following second frame structured signal to a power saving interval.
    Type: Application
    Filed: September 5, 2007
    Publication date: July 29, 2010
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Stefan Lindgren, Sten Sjöberg
  • Publication number: 20070130439
    Abstract: The invention relates generally to data security and to data memory technologies, and more specifically provides a method for storing and updating digital certificates in a flash memory, and provides further a flash memory and an electronic apparatus exploiting said method.
    Type: Application
    Filed: December 1, 2005
    Publication date: June 7, 2007
    Applicant: SONY ERICSSON MOBILE COMMUNICATIONS AB
    Inventors: Stefan Andersson, Werner Johansson, Stefan Lindgren
  • Patent number: 6916969
    Abstract: The invention relates to a material laminate for use as a covering sheet on absorbent articles such as sanitary napkins, incontinence protectors, diapers, pant diapers, or the like. The material laminate comprises a first, fluid pervious fibrous material layer and a second fluid pervious porous material layer, wherein at least one of the two material layers comprises thermoplastic material and wherein the two material layers are mutually connected by means of the covering material laminate exhibiting bond sites within which the thermoplastic material has been caused to at least partially soften or melt and thereby bond the two material layers together.
    Type: Grant
    Filed: July 3, 2000
    Date of Patent: July 12, 2005
    Assignee: SCA Hygiene Products AB
    Inventors: Bror-Inge Helmfridsson, Urban Nilsson, Stefan Lindgren
  • Patent number: 6806831
    Abstract: A stacked patch antenna comprising two metallic patches (210, 240) stacked on top of each other. The middle patch (210) comprises at least two conductors (224, 234) at or close to its edge (212), which conductors are intended to be connected to a ground plane (200) to thereby ground the patch in two places. The top patch (240) comprises at least two conductors (254, 264) at or close to its edge (242) which electrically interconnect the two patches. The middle patch is fed at a feed area (219) which is at least proximate its geometric center. The middle patch further comprises at least two apertures (220, 230) completely within its circumference (212), i.e. each aperture having a respective unbroken circumference (232, 242). Thereby enabling radiation from slots (214, 216, 244, 246) defined by the edge of the top patch and the edge of the middle patch and defined by the edge of the middle patch and the ground plane.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: October 19, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Martin Johansson, Stefan Lindgren, Anna Grincwajg
  • Publication number: 20020175871
    Abstract: A stacked patch antenna comprising two metallic patches (210, 240) stacked on top of each other. The middle patch (210) comprises at least two conductors (224, 234) at or close to its edge (212), which conductors are intended to be connected to a ground plane (200) to thereby ground the patch in two places. The top patch (240) comprises at least two conductors (254, 264) at or close to its edge (242) which electrically interconnect the two patches. The middle patch is fed at a feed area (219) which is at least proximate its geometric center. The middle patch further comprises at least two apertures (220, 230) completely within its circumference (212), i.e. each aperture having a respective unbroken circumference (232, 242). Thereby enabling radiation from slots (214, 216, 244, 246) defined by the edge of the top patch and the edge of the middle patch and defined by the edge of the middle patch and the ground plane.
    Type: Application
    Filed: March 1, 2002
    Publication date: November 28, 2002
    Inventors: Martin Johansson, Stefan Lindgren, Anna Grincwajg
  • Patent number: 5774609
    Abstract: Optical components intended for telecommunications purposes must be manufactured and mounted with a great degree of accuracy, since a component, such as an optochip, when mounted must be coupled optically, electrically, mechanically and thermally at the same time. In order to obtain a right-angled geometry when using surface-emitting or surface-detecting components, and to obtain a reduced optical travel path and accurate fixation of an optofiber, a reflective surface (12) which slopes at an angle of 45 degrees is arranged between a light-conducting core (16) and the active surface (10) of an optochip, and the light-conducting core has been placed closer to the reflective surface by bevelling the optofiber (9) and fitting the fiber in a V-groove and accurately fixating the fiber in the groove by means of a flat cover means (20).
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: June 30, 1998
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Lennart Backlin, Ylva Backlund, H.ang.kan Elderstig, Stefan Lindgren, Odd Steijer