Patent ID: 8400421
Filing Date: 2013-03-19
Classification: G06F

Abstract:
1. A multi-touch detecting method adapted for detecting locations of touched points on a touch panel, the touch panel including first and second conductive films insulated from each other and coupled electrically to each other through touch, the multi-touch detecting method comprising: scanning first measuring points of the first conductive film distributed along X-axis of a Cartesian plane of the touch panel, and determining x-components of the touched points, based on the response of the first measuring points; scanning second measuring points of the second conductive film distributed along Y-axis of the Cartesian plane of the touch panel, and determining y-components of the touched points, based on the response of the second measuring points; applying a first voltage to the first conductive film; and applying a second voltage different from the first voltage to at least one of the second measuring points with the location on the Y-axis adjacent to or overlapping one of the y-components, measuring sequentially voltages at the first measuring points with the locations on the X-axis adjacent to or overlapping the x-components, in response to the application of the second voltage, and outputting the one of the y-components and one of the x-components, which corresponds to one of the first measuring points at which a local extreme voltage is measured, as the location of a corresponding one of the touched points.