Patent ID: 7294822
Filing Date: 2007-11-13
Classification: A63B,G01S

Abstract:
1. A method for determining a position of a device on a two-dimensional surface, comprising: sweeping a first elongated line of light in a first direction across the surface in a manner that illuminates the device on the surface as the first elongated line of light moves over the device; monitoring where the first line of light is located on the surface on a real time basis; detecting the light that illuminates the device as the first elongated line of light sweeps across the surface and correlating timing of such detection of light with the position of the first elongated line of light at the time the light illuminating the device is detected to determine a first direction coordinate position of the device on the surface; sweeping a second elongated line of light in a second direction across the surface in a manner that illuminates the device on the surface as the second elongated line of light moves over the device; monitoring where the second line of light is located on the surface on a real time basis; and detecting the light that illuminates the device as the second elongated line of light sweeps across the surface and correlating timing of such detection of light with the position of the second elongated line of light at the time the light illuminating the device is detected to determine a second direction coordinate position of the device on the surface.