| Patent application number | Description | Published |
|---|
| 20080198138 | Identification of devices on touch-sensitive surface - The identification of a data storage device detected on a touch-sensitive display surface of a display device is described. In one embodiment, the presence and location of the data storage device is detected on the display surface and the data storage device is detected on a wireless communications channel. It is then confirmed that the data storage device detected on the wireless communications channel is the data storage device detected on the surface of the display device by communicating with the data storage device over a second communications channel. | 08-21-2008 |
| 20080251584 | Optically trackable tag - The tracking of a motion of an optically readable tag is disclosed. In one embodiment, an optically readable tag comprises a plurality of data features, one or more orientation features, and an optically readable tracking feature. The tracking feature comprises a continuous region with a minimum dimension greater than a maximum dimension of each data feature. Additionally, the data features and the orientation features are separated from the tracking feature by a border having a minimum width greater than a maximum dimension of each data feature. With this configuration, the tracking feature may be tracked even when a tag is moving too quickly for the data features to be read and tracked. | 10-16-2008 |
| 20090085881 | DETECTING FINGER ORIENTATION ON A TOUCH-SENSITIVE DEVICE - The determination of an orientation of a finger touching a touch-sensitive device is disclosed. In one embodiment, a computing device comprises a display screen configured to display an image to a user, and an intensity-sensitive touch-sensing input mechanism configured to detect one or more objects touching the display screen. The device also comprises a controller configured to determine an orientation of a finger touching the screen from a direction between a center of a first set of touch data and a center of a second set of touch data, and to adjust an image on the display screen in response to a determined orientation of the finger. | 04-02-2009 |
| 20090091553 | DETECTING TOUCH ON A SURFACE VIA A SCANNING LASER - The detection of touch on an optical touch-sensitive device is disclosed. For example, one disclosed embodiment comprises a touch-sensitive device including a display screen, a laser, and a scanning mirror configured to scan light from the laser across the screen. The touch-sensitive device also includes a position-sensitive device and optics configured to form an image of at least a portion of the screen on the position-sensitive device. A location of an object relative to the screen may be determined by detecting a location on the position-sensitive device of laser light reflected by the object. | 04-09-2009 |
| 20090091554 | CORRECTING FOR AMBIENT LIGHT IN AN OPTICAL TOUCH-SENSITIVE DEVICE - The correction of an image for ambient light in an optical touch-sensitive device is disclosed. For example, one disclosed embodiment comprises integrating a first field of pixels in an image data frame for a different duration of ambient light exposure than a second field of pixels in the image data frame. Intensity data is read from the first field of pixels and the second field of pixels, and an ambient light value is determined for one or more pixels in the image data frame from the intensity data. The ambient light value then is used to adjusting one or more pixels of the data frame for ambient light. | 04-09-2009 |
| 20090173796 | OPTICALLY READABLE TAG - Embodiments related to the identification of objects via optically readable tags. One disclosed embodiment comprises an optically readable tag having a data region comprising a two-dimensional array of optically contrasting data features, one or more orientation features located on the tag outside of the data region, and a tracking feature located outside of the data region and having a larger size than the orientation features and the data features. | 07-09-2009 |
| 20090231515 | PHOTOLUMINESCENT BACKLIGHTING OF LIGHT VALVE - Various embodiments related to photoluminescent backlighting for a light valve are disclosed herein. One disclosed embodiment comprises a computing device with a light valve having a viewing side and a back side. A photoluminescent material is disposed behind the back side of the light valve, and an excitation light source is positioned to illuminate the photoluminescent material. Photoluminescence from the photoluminescent material backlights the light valve when the excitation light source illuminates the photoluminescent material. | 09-17-2009 |
| 20090315906 | CACHE ARRANGEMENT FOR GRAPHICAL APPLICATIONS - A cache arrangement for graphical applications is disclosed. One embodiment comprises receiving a first address having a first n-bit portion and corresponding to a first pixel, receiving a second address having a second n-bit portion and corresponding to the first pixel, reversing the order of the second n-bit portion to form a reversed n-bit portion, and generating a first cache entry number derived from the first n-bit portion and the reversed n-bit portion. | 12-24-2009 |
| 20100045962 | Distance Estimation Based On Image Contrast - The determination of an apparent distance between an object and a surface is disclosed. One disclosed embodiment comprises illuminating the object with a spatially inhomogeneous irradiance from the surface, an intensity variation in the spatially inhomogeneous irradiance in a plane parallel to the surface responsive to a distance between the plane and the surface. Next, an image of the object is acquired while the object is illuminated by the spatially inhomogeneous irradiance, and the apparent distance of the object from the surface is determined based on a brightness contrast in the image of the object due to the spatially inhomogeneous irradiance. | 02-25-2010 |
| 20100073326 | CALIBRATION OF AN OPTICAL TOUCH-SENSITIVE DISPLAY DEVICE - Embodiments related to the calibration of an optical touch-sensitive display device are disclosed. For example, one disclosed embodiment comprises a method of calibrating an image sensor, wherein the method comprises placing a photoluminescent panel over the display surface, and illuminating a target location on the display surface with visible light. Infrared light that is emitted by the panel in response to the illumination of the display surface is received via the image sensor. The received light then is used to calibrate the device. | 03-25-2010 |
| 20110012866 | AMBIENT CORRECTION IN ROLLING IMAGE CAPTURE SYSTEM - Embodiments are disclosed that relate to the correction of an image acquired in a rolling image capture system for ambient light. One embodiment provides a device comprising a screen, a rolling image capture system, a local light source, and a controller. The controller is configured to operate the local light source while acquiring first and second frames of image data to integrate each field of image sensor pixels for a duration of local+ambient light and for a duration of ambient light such that a sum t | 01-20-2011 |
