DETERMINING TOUCH SIGNALS FROM INTERACTIONS WITH A REFERENCE PLANE PROXIMATE TO A DISPLAY SURFACE

摘要

A reference plane generating unit generates a reference plane of light parallel to a display surface. For example, the reference plane generating unit projects a plane of infrared light parallel to a plane including the display surface. When a pointer, such a stylus or a finger, breaks the reference plane, light is reflected from the reference plane, with at least a portion of the reflected light directed toward an image capturing unit. Based on the reflected light captured by the image capturing unit, the image processing unit determines a position of the pointer in the reference plane and determines a touch signal corresponding to the determined position of the pointer. The touch signal is communicated to a processing unit, such as a mobile device, that performs an operation corresponding to the determined touch signal.

主权项

1. A system for performing one or more operations based on interaction with image data presented on a display surface comprising:
a reference plane generating unit configured to project a reference plane of light parallel to the display surface on which frames of image data are displayed, the reference plane positioned within a threshold distance of the display surface; an image capturing unit positioned so the display surface and the reference plane are within a field of view of the image capturing unit, the image capturing unit configured to capture one or more images including light reflected from the reference plane by a pointer breaking the reference plane of light; an image processing unit configured to determine a position in the reference plane of the pointer from the one or more images captured by the image capturing unit including light reflected from the reference plane by the pointer and to determine a touch signal corresponding to the determined position of the pointer in the reference plane; and a processing unit configured to receive the touch signal from the image processing unit and to perform an operation corresponding to the touch signal.