Patent ID: 8698753
Filing Date: 2014-04-15
Classification: G06F

Abstract:
1. A method for a mobile device to control a virtual input device, comprising: displaying information on a display unit; forming a virtual input pattern for detection of user input on an input region of a display plane outside the mobile device by using visible light; detecting a distance difference between an input means and an invisible shadow of the input means, wherein the invisible shadow of the input means is generated by an invisible light; detecting a relative velocity between the input means and the invisible shadow of the input means; determining a contact of the input means on the virtual input pattern based on both the distance difference and when a sign value of the relative velocity between the input means and the invisible shadow changes, wherein the sign value represents a positive value or a negative value; and displaying, as a feedback, feedback information on the contact through a projector on a feedback region of the display plane, wherein the feedback region is apart from the input region.