Patent ID: 6707448
Filing Date: 2004-03-16
Classification: G06F

Abstract:
A method for determining a touch control position on a control pad, comprising the steps of:(a) continuously providing a plurality of horizontal position detecting lines and a plurality of vertical position detecting lines across said control pad; (b) detecting at least one of said plurality of horizontal position detecting lines, which are formed in parallel in a vertical direction on the control pad by beams irradiated in the vertical direction from light emitting sections to light receiving sections, and at least one of said plurality of vertical position detecting lines, which are formed in a parallel in a horizontal direction of the control pad by beams irradiated in the horizontal direction from light emitting sections to light receiving sections; (c) detecting an interception of at least one of the plurality of horizontal position detecting lines or at least one of the plurality of vertical position detecting lines, and (d) determining a control position on said control pad on the basis of positions of said intercepted lines and at least one of said horizontal position detecting lines which is not intercepted and at least one of said vertical position detecting lines which is not intercepted.