Patents by Inventor Henrik Wall
Henrik Wall 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: 20210089164Abstract: 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: ApplicationFiled: August 31, 2020Publication date: March 25, 2021Inventors: Tomas CHRISTIANSSON, Henrik WALL, Nicklas Ohlsson, Mattias KRUS, Tomas SVENSSON
-
Patent number: 10761657Abstract: 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: GrantFiled: November 17, 2017Date of Patent: September 1, 2020Assignee: FlatFrog Laboratories ABInventors: Tomas Christiansson, Henrik Wall, Nicklas Ohlsson, Mattias Krus, Tomas Svensson
-
Patent number: 10474249Abstract: A touch sensing apparatus includes a group of emitters arranged to emit light to illuminate at least part of the touch surface, a light detector arranged to receive light from the group of emitters, and a processing element. Each emitter is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter. The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters. The processing element processes an output signal from the light detector to separate the light received from the individual emitters based on the transmitted codes, and to determine the position of the object/objects based on the light received from the individual emitters.Type: GrantFiled: June 14, 2018Date of Patent: November 12, 2019Assignee: FlatFrog Laboratories ABInventors: Christer Fahraeus, Henrik Wall, Ola Wassvik, Tomas Christiansson
-
Publication number: 20190317640Abstract: 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: ApplicationFiled: November 17, 2017Publication date: October 17, 2019Inventors: Tomas CHRISTIANSSON, Henrik WALL, Nicklas Ohlsson, Mattias KRUS, Tomas SVENSSON
-
Publication number: 20190094990Abstract: A touch sensing apparatus includes a group of emitters arranged to emit light to illuminate at least part of the touch surface, a light detector arranged to receive light from the group of emitters, and a processing element. Each emitter is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter. The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters. The processing element processes an output signal from the light detector to separate the light received from the individual emitters based on the transmitted codes, and to determine the position of the object/objects based on the light received from the individual emitters.Type: ApplicationFiled: June 14, 2018Publication date: March 28, 2019Inventors: Christer FAHRAEUS, Henrik WALL, Ola WASSVIK, Tomas CHRISTIANSSON
-
Patent number: 10048773Abstract: A touch sensing apparatus includes a group of emitters arranged to emit light to illuminate at least part of the touch surface, a light detector arranged to receive light from the group of emitters, and a processing element. Each emitter is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter. The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters. The processing element processes an output signal from the light detector to separate the light received from the individual emitters based on the transmitted codes, and to determine the position of the object/objects based on the light received from the individual emitters.Type: GrantFiled: August 23, 2016Date of Patent: August 14, 2018Assignee: FlatFrog Laboratories ABInventors: Christer Fahraeus, Henrik Wall, Ola Wassvik, Tomas Christiansson
-
Publication number: 20180225006Abstract: The disclosure relates to a touch sensitive system including a touch surface, a plurality of emitters that emit light, a plurality of detectors that detect the emitted light, a plurality of distributed controllers each can control operation of a segment of emitters and detectors, a main controller that can control the distributed controllers. The touch sensitive system can set in a partial detect mode in which mode a first of the distributed controllers can be active and control a first emitter to emit light in a partial region of the panel coincident with a partial area of the touch surface. The touch sensitive system can detect a predetermined gesture on the partial area of the touch surface, generate a gesture signal indicating the predetermined gesture, and activate a feature of the touch sensitive system in accordance with the predetermined gesture.Type: ApplicationFiled: January 3, 2018Publication date: August 9, 2018Inventor: Henrik Wall
-
Patent number: 9874978Abstract: The disclosure relates to a touch sensitive system comprising a touch sensitive panel defining a touch surface, a plurality of emitters configured to emit light into the panel for propagation in the panel, a plurality of detectors configured to detect the light propagating in the panel, a plurality of distributed control devices each configured to control operation of a segment of emitters and detectors, a main control unit configured to control the distributed control devices. The touch sensitive system is configured to be set in a partial detect mode in which mode a first of the distributed control devices is configured to be active and to control a first emitter to emit light in a partial region of the panel coincident with a partial area of the touch surface.Type: GrantFiled: June 10, 2014Date of Patent: January 23, 2018Assignee: FLATFROG LABORATORIES ABInventor: Henrik Wall
-
Publication number: 20170010688Abstract: A touch sensing apparatus includes a group of emitters arranged to emit light to illuminate at least part of the touch surface, a light detector arranged to receive light from the group of emitters, and a processing element. Each emitter is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter. The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters. The processing element processes an output signal from the light detector to separate the light received from the individual emitters based on the transmitted codes, and to determine the position of the object/objects based on the light received from the individual emitters.Type: ApplicationFiled: August 23, 2016Publication date: January 12, 2017Applicant: Flatfrog Laboratories ABInventors: Christer FAHRAEUS, Henrik WALL, Ola WASSVIK, Tomas CHRISTIANSSON
-
Patent number: 9442574Abstract: A touch sensing apparatus includes a group of emitters arranged to emit light to illuminate at least part of the touch surface, a light detector arranged to receive light from the group of emitters, and a processing element. Each emitter is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter. The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters. The processing element processes an output signal from the light detector to separate the light received from the individual emitters based on the transmitted codes, and to determine the position of the object/objects based on the light received from the individual emitters.Type: GrantFiled: October 11, 2013Date of Patent: September 13, 2016Assignee: FLATFROG LABORATORIES ABInventors: Christer Fåhraeus, Henrik Wall, Ola Wassvik, Tomas Christiansson
-
Patent number: 9411464Abstract: A multi-touch system includes a panel for conducting signals, e.g. by FTIR, from incoupling points to outcoupling points, to define detection lines across the panel. A signal processor operates in a repeating sequence of iterations to obtain an output signal from a detector coupled to the outcoupling points and generate a formatted signal value for each detection line, and operate a reconstruction algorithm on the formatted signal values to determine an interaction pattern on the panel. The signal processor also, at least intermittently in the sequence of iterations, operates compensation data on the formatted signal values to compensate for contaminations on the panel, and calculates updated compensation data based on an interference pattern determined as a function of the interaction pattern, the interference pattern being a 2D representation of contamination-induced signal interferences. The influence of contaminations in the interaction pattern is thereby suppressed.Type: GrantFiled: March 6, 2012Date of Patent: August 9, 2016Assignee: FLATFROG LABORATORIES ABInventors: Mats Petter Wallander, Tomas Christiansson, Henrik Wall
-
Patent number: 9377884Abstract: Multi-touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, e.g. by FTIR, from a plurality of incoupling points to a plurality of outcoupling points, thereby defining detection lines across the panel between pairs of incoupling and outcoupling points. A signal processor operates in a repeating sequence of iterations to obtain (50) a current signal value for each detection line, and generate (53, 53?) a first interaction pattern and a second interaction pattern as a function of the current signal values, such that the first and second interaction patterns are reconstructed two-dimensional distributions of local interaction with the conducted signals across the surface portion, and represent changes in interaction on different time scales. Thereby, the movement of an object will affect how it is represented in each of the first and second interaction patterns.Type: GrantFiled: October 8, 2012Date of Patent: June 28, 2016Assignee: FLATFROG LABORATORIES ABInventors: Tomas Christiansson, Mats Petter Wallander, Peter Juhlin, Andreas Johansson, Henrik Wall, Nicklas Ohlsson
-
Publication number: 20160154531Abstract: The disclosure relates to a touch sensitive system comprising a touch sensitive panel defining a touch surface, a plurality of emitters configured to emit light into the panel for propagation in the panel, a plurality of detectors configured to detect the light propagating in the panel, a plurality of distributed control devices each configured to control operation of a segment of emitters and detectors, a main control unit configured to control the distributed control devices. The touch sensitive system is configured to be set in a partial detect mode in which mode a first of the distributed control devices is configured to be active and to control a first emitter to emit light in a partial region of the panel coincident with a partial area of the touch surface.Type: ApplicationFiled: June 10, 2014Publication date: June 2, 2016Inventor: Henrik Wall
-
Publication number: 20140292701Abstract: Multi-touch sensitivity is enabled using a touch system that comprises a panel configured to conduct signals, e.g. by FTIR, from a plurality of incoupling points to a plurality of outcoupling points, thereby defining detection lines across the panel between pairs of incoupling and outcoupling points. A signal processor operates in a repeating sequence of iterations to obtain (50) a current signal value for each detection line, and generate (53, 53?) a first interaction pattern and a second interaction pattern as a function of the current signal values, such that the first and second interaction patterns are reconstructed two-dimensional distributions of local interaction with the conducted signals across the surface portion, and represent changes in interaction on different time scales. Thereby, the movement of an object will affect how it is represented in each of the first and second interaction patterns.Type: ApplicationFiled: October 8, 2012Publication date: October 2, 2014Applicant: FLATFROG LABORATORIES ABInventors: Tomas Christiansson, Mats Petter Wallander, Peter Juhlin, Andreas Johansson, Henrik Wall, Nicklas Ohlsson
-
Publication number: 20140125633Abstract: A touch sensing apparatus includes a group of emitters arranged to emit light to illuminate at least part of the touch surface, a light detector arranged to receive light from the group of emitters, and a processing element. Each emitter is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter. The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters. The processing element processes an output signal from the light detector to separate the light received from the individual emitters based on the transmitted codes, and to determine the position of the object/objects based on the light received from the individual emitters.Type: ApplicationFiled: October 11, 2013Publication date: May 8, 2014Applicant: FlatFrog Laboratories ABInventors: Christer FÅHRAEUS, Henrik WALL, Ola WASSVIK, Tomas CHRISTIANSSON
-
Patent number: 8692807Abstract: An apparatus, method and computer-readable medium for determining a location of at least one object on a touch surface of a light transmissive panel. The method comprises the steps of: introducing light into the panel for propagation by internal reflection between the touch surface and an opposite surface; receiving the light propagating in the panel; and iteratively i) determining a current signal profile of light received by the light detection arrangement, ii) updating, when a condition is met, a background signal profile of light received by the light detection arrangement, iii) calculating a current compensated signal profile as a function of the background signal profile and the current signal profile and iv) determining, when the object touches the touch surface and thereby attenuates the light propagating in the panel, the location as a function of the compensated signal profile.Type: GrantFiled: September 1, 2010Date of Patent: April 8, 2014Assignee: Flatfrog Laboratories ABInventors: Christer Føhraeus, Tomas Christiansson, Henrik Wall, Ola Wassvik
-
Publication number: 20130342490Abstract: A multi-touch system includes a panel for conducting signals, e.g. by FTIR, from incoupling points to outcoupling points, to define detection lines across the panel. A signal processor operates in a repeating sequence of iterations to obtain an output signal from a detector coupled to the outcoupling points and generate a formatted signal value for each detection line, and operate a reconstruction algorithm on the formatted signal values to determine an interaction pattern on the panel. The signal processor also, at least intermittently in the sequence of iterations, operates compensation data on the formatted signal values to compensate for contaminations on the panel, and calculates updated compensation data based on an interference pattern determined as a function of the interaction pattern, the interference pattern being a 2D representation of contamination-induced signal interferences. The influence of contaminations in the interaction pattern is thereby suppressed.Type: ApplicationFiled: March 6, 2012Publication date: December 26, 2013Applicant: FLATFROG LABORATORIES ABInventors: Mats Petter Wallander, Tomas Christiansson, Henrik Wall
-
Patent number: 8581884Abstract: A touch sensing apparatus is controlled to determine the position of one or more objects (7) that interact with a touch surface (1). The apparatus includes a group of emitters (2) arranged to emit light to illuminate at least part of the touch surface (1), a light detector (4) arranged to receive light from the group of emitters (2), and a processing element (7). Each emitter (2) is controlled to transmit a code by way of the emitted light such that the code identifies the respective emitter (2). The codes may at least partly be transmitted concurrently. The codes may be selected such that a value of an autocorrelation of each code is significantly higher than a value of a cross-correlation between any two codes of different emitters (2).Type: GrantFiled: December 2, 2009Date of Patent: November 12, 2013Assignee: FlatFrog Laboratories ABInventors: Christer Fåhraeus, Henrik Wall, Ola Wassvik, Tomas Christiansson
-
Publication number: 20120200538Abstract: An apparatus for determining an interaction between an object and a touch surface of a panel. An illumination arrangement introduces light into the panel for propagation by internal reflection between the touch surface and an opposite surface and towards a receiving light detection arrangement. A processor unit is configured to iteratively i) determine, based on the received light, a current light status representing a two-dimensional distribution of light in the panel, ii) determine the interaction with the object as a function of the current light status and a previously updated background status representing a two-dimensional distribution of light in the panel caused by contaminations, and iii) update the background status as a function of the interaction. A method and computer readable medium are also described.Type: ApplicationFiled: October 13, 2010Publication date: August 9, 2012Applicant: FLATFROG LABORATORIES ABInventors: Tomas Christiansson, Christer Fåhraeus, Henrik Wall, Ola Wassvik, Mattias Bryborn Krus
-
Publication number: 20120162144Abstract: An apparatus, method and computer-readable medium for determining a location of at least one object on a touch surface of a light transmissive panel. The method comprises the steps of: introducing light into the panel for propagation by internal reflection between the touch surface and an opposite surface; receiving the light propagating in the panel; and iteratively i) determining a current signal profile of light received by the light detection arrangement, ii) updating, when a condition is met, a background signal profile of light received by the light detection arrangement, iii) calculating a current compensated signal profile as a function of the background signal profile and the current signal profile and iv) determining, when the object touches the touch surface and thereby attenuates the light propagating in the panel, the location as a function of the compensated signal profile.Type: ApplicationFiled: September 1, 2010Publication date: June 28, 2012Applicant: FLATFROG LABORATORIES ABInventors: Christer Fåhraeus, Tomas Christiansson, Henrik Wall, Ola Wassvik