Patent ID: 8294681
Filing Date: 2012-10-23
Classification: G06F,H04N

Abstract:
1. A method of generating a key code in a video device controller having a touch pad, the method comprising: recognizing coordinate values corresponding to a touch trajectory executed with respect to the touch pad; calculating at least one of a direction, speed, or distance of the touch trajectory using the recognized coordinate values; and generating a movement command signal corresponding to the calculated values, the generated movement command signal corresponding to a key code output to control a video device by shifting an object displayed on the video device, wherein generating the command signal comprises: assigning a x-axis and a y-axis to an area of the touch pad, dividing the touch pad area along the x-axis into an upper y-axis area and a lower y-axis area, reconfiguring the touch pad area for point-for-point symmetry between the upper and lower y-axis areas, and centering vertically on a maximum x-coordinate point of the touch pad area, to thereby reposition coordinates of the lower y-axis area, wherein the direction and speed of the touch trajectory are calculated using the repositioned x-axis coordinates, and wherein the x-axis coordinate of the repositioned lower y-axis area is expressed by where x′ is the x-axis coordinate of the repositioned lower y-axis area, x is the x-coordinate of the lower y-axis area without said reconfiguring of the touch pad area, and L is twice a maximum x-coordinate value.