| Next Holdings Limited Patent applications |
| Patent application number | Title | Published |
|---|
| 20100229090 | Systems and Methods for Interacting With Touch Displays Using Single-Touch and Multi-Touch Gestures - Embodiments include position detection systems that can identify two touch locations mapped to positions proximate a GUI object, such as a boundary. In response to movement of one or both of the two touch locations, the GUI object can be affected, such as moving the boundary to resize a corresponding object and/or to relocate the boundary, or the GUI object can be selected without movement of the touch locations. Embodiments include single touch gestures, such as identifying a rolling, bending, or other movement occurring while a touch location remains substantially the same and interpreting the movement as an input command. Embodiments may utilize one or more optical sensors having sufficient sensitivity to recognize changes in detected light due to variations in object orientation, makeup or posture caused by the rolling, bending, and/or other movement(s). | 09-09-2010 |
| 20100225588 | Methods And Systems For Optical Detection Of Gestures - A position detection system can comprise a display device, an input device, and an optical assembly positioned adjacent to the display device. The optical assembly can comprise an image sensor configured to detect light in a space between the display device and the input device. One or both of the imaging assembly and the input device can be configured to direct energy into the space between the display device and the input device, with directing energy comprising reflecting energy and/or emitting energy. A processing device can be configured to use the imaging sensor to determine when an object is in the space and/or to determine motion of the object. | 09-09-2010 |
| 20100207911 | Touch screen Signal Processing With Single-Point Calibration - A coordinate detection system can comprise a display screen, a touch surface corresponding the top of the display screen or a material positioned above the screen and defining a touch area, at least one camera outside the touch area and configured to capture an image of space above the touch surface, and a processor executing program code to identify whether an object interferes with the light from the light source projected through the touch surface based on the image captured by the at least one camera. The processor can be configured to carry out a calibration routine utilizing a single touch point in order to determine a plane corresponding to the touch surface by using mirror images of the features adjacent the touch surface, images of the features, and/or based on the touch point and a normal to the reflective plane defined by an image of the object and its mirror image. | 08-19-2010 |
| 20100103143 | TOUCH SCREEN SIGNAL PROCESSING - A touch screen which uses light sources at one or more edges of the screen which directs light across the surface of the screen and at least two cameras having electronic outputs located at the periphery of the screen to receive light from said light sources. A processor receives the outputs of said cameras and employs triangulation techniques to determine the location of an object proximate to said screen. Detecting the presence of an object includes detecting at the cameras the presence or absence of direct light due to the object, using a screen surface as a mirror and detecting at the cameras the presence or absence of reflected light due to an object. The light sources may be modulated to provide a frequency band in the output of the cameras. | 04-29-2010 |
| 20100097353 | TOUCH SCREEN SIGNAL PROCESSING - A touch screen which uses light sources at one or more edges of the screen which directs light across the surface of the screen and at least two cameras having electronic outputs located at the periphery of the screen to receive light from said light sources. A processor receives the outputs of said cameras and employs triangulation techniques to determine the location of an object proximate to said screen. Detecting the presence of an object includes detecting at the cameras the presence or absence of direct light due to the object, using a screen surface as a mirror and detecting at the cameras the presence or absence of reflected light due to an object. The light sources may be modulated to provide a frequency band in the output of the cameras. | 04-22-2010 |
| 20100090985 | TOUCH SCREEN SIGNAL PROCESSING - A touch screen which uses light sources at one or more edges of the screen which directs light across the surface of the screen and at least two cameras having electronic outputs located at the periphery of the screen to receive light from said light sources. A processor receives the outputs of said cameras and employs triangulation techniques to determine the location of an object proximate to said screen. Detecting the presence of an object includes detecting at the cameras the presence or absence of direct light due to the object, using a screen surface as a mirror and detecting at the cameras the presence or absence of reflected light due to an object. The light sources may be modulated to provide a frequency band in the output of the cameras. | 04-15-2010 |
| 20100085330 | TOUCH SCREEN SIGNAL PROCESSING - A coordinate detection system can comprise a display screen, a touch surface corresponding the top of the display screen or a material positioned above the screen and defining a touch area, at least one camera outside the touch area and configured to capture an image of space above the touch surface, an illumination system comprising a light source, the illumination system configured to project light from the light source through the touch surface, and a processor executing program code to identify whether an object interferes with the light from the light source projected through the touch surface based on the image captured by the at least one camera. Light can be directed upward by sources positioned behind the screen, by sources positioned behind the screen that direct light into a backlight assembly that directs the light upward, and/or by a forward optical assembly in front of the screen that directs the light upward. | 04-08-2010 |
| 20100045629 | Systems For Resolving Touch Points for Optical Touchscreens - An optical touch detection system may rely on triangulating points in a touch area based on the direction of shadows cast by an object interrupting light in the touch area. When two interruptions occur simultaneously, ghost points and true touch points triangulated from the shadows can be distinguished from one another without resort to additional light detectors. In some embodiments, a distance from a touch point to a single light detector can be determined or estimated based on a change in the length of a shadow detected by a light detector when multiple light sources are used. Based on the distance, the true touch points can be identified by comparing the distance as determined from shadow extension to a distance calculated from the triangulated location of the touch points. | 02-25-2010 |
| 20090278816 | Systems and Methods For Resolving Multitouch Scenarios Using Software Filters - Software heuristics can be applied to determine which two points of a plurality of potential touch points are likely actual touch points based on a potential touch point's location relative to a predefined touch area and/or a characteristic of a hypothetical touch corresponding to the potential touch point. For instance, a software filter may determine if a potential touch point lies outside the touch area based on comparing coordinates of the potential touch point to boundaries of the predefined touch area. As another example, if the size of the hypothetical touch exceeds a threshold and is in a particular position (e.g., near an edge of the touch area), the potential touch point may be identified as a ghost touch point. As another example, a filter may evaluate whether a shape of the hypothetical touch exceeds a threshold for asymmetry; if so, the potential touch point may be identified as a ghost touch point. | 11-12-2009 |
| 20090237376 | Optical Position Sensing System and Optical Position Sensor Assembly with Convex Imaging Window - An optical position sensing system includes a bezel surrounding a display, a position sensor assembly, and a processor for calculating touch locations. Prismatic film may be applied to the bezel. Each optical position sensor assembly includes a body. A lens holder holds an imaging window on a first side and a single element aspherical lens on a second side. The imaging window has an inside face shaped to form a shallow convex surface. The lens holder is mounted to a front face of the body such that the lens is aligned with an opening in the body. An optical sensor is mounted to a rear face of the body and aligned with the opening. A radiation source is positioned within the body above the lens holder and behind an illumination window. A light path separator is positioned between the illumination window and the imaging window. | 09-24-2009 |
| 20090213094 | Optical Position Sensing System and Optical Position Sensor Assembly - An optical position sensing system includes a bezel surrounding a display, a position sensor assembly, and a processor for calculating touch locations. Prismatic film may be applied to the bezel. Each optical position sensor assembly includes a body. A lens holder holds an illumination window on a first side and a single element aspherical lens on a second side. The lens holder is mounted to a front face of the body such that the lens is aligned with an opening in the body. An optical sensor is mounted to a rear face of the body and aligned with the opening. A radiation source is positioned within the body above the lens holder and behind an illumination window. A light path separator is positioned between the illumination window and the imaging window, so that the radiation path is optically separated from the view path of the optical sensor. | 08-27-2009 |
| 20090213093 | Optical position sensor using retroreflection - An optical position sensing system includes a display surrounded by a bezel, which may have high performance prismatic retroreflective film applied to it. The prismatic film may have a plurality of metallized and canted cube corner, with cant angles of greater than 5 degrees. The system also includes least one position sensing component, including at least one radiation source and an optical sensor. An optical position sensing component may include a plurality of radiation source, to improve performance of more diffuse retroreflective film. The position of the radiation source(s) may be varied with respect to the aperture to achieve further performance enhancements. Supplemental radiation sources may be positioned around the bezel so as to provide supplemental backlighting. Each of the plurality of supplemental radiation sources can be individually activated and deactivated, so as to selectively provide said supplemental backlighting to selected areas within the bezel. | 08-27-2009 |
| 20090207144 | Position Sensing System With Edge Positioning Enhancement - Position sensing systems and methods for enhancing user interaction with an edge of a display. Position sensing components generate signals for determining touch point locations. A distance between the touch point and a nearest edge of the display is calculated. If the distance is not less than a threshold value, a cursor is displayed on the display at a default cursor position closely tracking the touch point. If the distance is less than the threshold value a cursor offset position is calculated and the cursor is displayed at the cursor offset position. The cursor offset position is offset in at least one dimension relative to the default cursor position and may be calculated by applying a geometric transformation to coordinates of the default cursor position. Optionally, the cursor offset position may result in the cursor being “forced” over an item displayed at the edge of the display. | 08-20-2009 |
