| FlatFrog Laboratories AB Patent applications |
| Patent application number | Title | Published |
|---|
| 20120068973 | Determining The Location Of An Object On A Touch Surface - An apparatus is operated to determine the location of at least one object on a touch surface ( | 03-22-2012 |
| 20110216042 | INTEGRATED TOUCH-SENSING DISPLAY APPARATUS AND METHOD OF OPERATING THE SAME - An integrated touch-sensing display is operated to detect the location of one or more objects on a touch surface. The integrated touch-sensing display defines a display area. A light guide ( | 09-08-2011 |
| 20110090176 | DETERMINING THE LOCATION OF ONE OR MORE OBJECTS ON A TOUCH SURFACE - A device operates on output signals from a light sensor arrangement in a touch-sensing apparatus to determine a position of an object on a touch surface. The apparatus includes a light transmissive panel that defines the touch surface and an opposite surface. A light source arrangement provides sheets of light inside the panel, wherein each sheet comprises light that propagates by internal reflection between the touch surface and the opposite surface from one or more incoupling points to a set of outcoupling points. The light sensor arrangement generates the output signals, which represent light reaching the outcoupling points. The apparatus is configured such that an object touching the touch surface locally attenuates at least two sheets of light. To determine the position, the device identifies, in the output signals, a set of signal profiles originating from said object. The device determines at least part of an attenuated light path across the panel based on each signal profile, and identifies the position of the object on the touch surface based on the thus-determined attenuated light paths. In determining the attenuated light path, the device applies a predetermined width function which is representative of a dependence of signal profile width on distance to the incoupling point due to light scattering caused by at least one of the touch surface and the opposite surface. | 04-21-2011 |
| 20110074735 | DETECTING THE LOCATIONS OF A PLURALITY OF OBJECTS ON A TOUCH SURFACE - An apparatus is controlled to detect locations of a plurality of objects on a touch surface of a panel. An input scanner arrangement introduces at least three beams of radiation into the panel for propagation by internal reflection, and sweeps the beams inside the panel across a sensing area, preferably in at least two different principal directions. At least one radiation detector is arranged to receive the beams from the input scanner arrangement while they are swept across the sensing area. A data processor is connected to the radiation detector(s) and operated to identify the locations based on an attenuation of the beams caused by the objects touching the touch surface within the sensing area, the attenuation being identifiable from an output signal of the radiation detector(s). Each output signal may be further processed to generate a transmission signal, by dividing the output signal by a background signal which represents the output signal without any object on the touch surface. | 03-31-2011 |
