RAPT IP LIMITED Patent applications |
Patent application number | Title | Published |
20140210792 | Method and Apparatus For Detecting A Multitouch Event In An Optical Touch-Sensitive Device - A touch sensitive optical control device comprising a set of light emitters | 07-31-2014 |
20140168169 | OPTICAL CONTROL SYSTEM WITH MODULATED EMITTERS - An optical control system is described, which employs a series of optical emitters and detectors arranged about a touch area. The emitters are driven by a series of functions, and the system is operable to correlate the signals received at the detectors with the functions to determine the amount of energy received by the detectors from each of the emitters. This system means that all or many emitters can be modulated simultaneously, so the scanning process is accelerated. Also, the energy estimates arrived at by correlation with the functions are largely unaffected by external interference signals as well by each other. An additional benefit of the present invention is that the correlation processing makes use of many detector samples and tends to yield results which have higher resolution than the sample values themselves, due to the averaging of noise over the sample set. | 06-19-2014 |
20130241893 | OPTICAL CONTROL SYSTEM WITH MODULATED EMITTERS - An optical control system is described, which employs a series of optical emitters and detectors arranged about a touch area. The emitters are driven by a series of orthogonal functions, and the system is operable to correlate the signals received at the detectors with the modulation functions to determine the amount of energy received by the detectors from each of the emitters. This system means that all or many emitters can be modulated simultaneously, so the scanning process is accelerated. Also, the energy estimates arrived at by correlation with the modulating functions are largely unaffected by external interference signals as well by each other. An additional benefit of the present invention is that the correlation processing makes use of many detector samples and tends to yield results which have higher resolution than the sample values themselves, due to the averaging of noise over the sample set. | 09-19-2013 |
20130021302 | OPTICAL COUPLER FOR USE IN AN OPTICAL TOUCH SENSITIVE DEVICE - An optical touch-sensitive device is able to determine the locations of multiple simultaneous touch events. The optical touch-sensitive device includes multiple emitters and detectors coupled with an optical coupler assembly through a waveguide on the surface on the optical-touch sensitive device. The coupler may be side coupled or edge coupled to the waveguide. For both the side coupled or edge coupled cases, the coupler may also be configured to reorient beams to accommodate any orientation of emitters and detectors with respect to the waveguide. The coupler may also be configured to translate beams laterally or vertically to accommodate any position of emitters and detectors. The coupler, and touch-sensitive device more generally, are also configured to prevent ambient light entering the waveguide from hitting the emitters and detectors. Each emitter produces optical beams which are received by the detectors. Touch events disturb the optical beams. | 01-24-2013 |
20120249486 | Optical Control System with Modulated Emitters - An optical control system is described, which employs a series of optical emitters and detectors arranged about a touch area. The emitters are driven by a series of orthogonal functions, and the system is operable to correlate the signals received at the detectors with the modulation functions to determine the amount of energy received by the detectors from each of the emitters. This system means that all or many emitters can be modulated simultaneously, so the scanning process is accelerated. Also, the energy estimates arrived at by correlation with the modulating functions are largely unaffected by external interference signals as well by each other. An additional benefit of the present invention is that the correlation processing makes use of many detector samples and tends to yield results which have higher resolution than the sample values themselves, due to the averaging of noise over the sample set. | 10-04-2012 |
20120218229 | Detecting Multitouch Events in an Optical Touch-Sensitive Device Using Touch Event Templates - An optical touch-sensitive device is able to determine the locations of multiple simultaneous touch events. The optical touch-sensitive device includes multiple emitters and detectors. Each emitter produces optical beams which are received by the detectors. Touch events disturb the optical beams. Touch event templates are used to determine the actual touch events based on which optical beams have been disturbed. | 08-30-2012 |
20120212458 | Detecting Multitouch Events in an Optical Touch-Sensitive Device by Combining Beam Information - An optical touch-sensitive device is able to determine the locations of multiple simultaneous touch events. The optical touch-sensitive device includes multiple emitters and detectors. Each emitter produces optical beams which are received by the detectors. The optical beams preferably are multiplexed in a manner so that many optical beams can be received by a detector simultaneously. Touch events disturb the optical beams. To determine whether a candidate touch point is an actual touch event, multiple beams that would be affected are considered together. | 08-23-2012 |
20120212457 | Detecting Multitouch Events in an Optical Touch-Sensitive Device Using Line Images - An optical touch-sensitive device is able to determine the locations of multiple simultaneous touch events. The optical touch-sensitive device includes multiple emitters and detectors. Each emitter produces optical beams which are received by the detectors. Touch events disturb the optical beams. Line images of the touch events are captured, which are then used to determine the touch events. | 08-23-2012 |