Patent ID: 9141249
Filing Date: 2015-09-22
Classification: G06F

Abstract:
1. A double-point detection method for resistive touch screen, wherein the screen body of the resistive touch screen includes a first conducting layer panel and a second conducting layer panel; two electrical connection ends on the first conducting layer panel form the X axis of a coordinates which sets on the surface of the resistive touch screen; two electrical connection ends on the second conducting layer panel form the Y axis of the coordinates; a first test resistor Rx is set in series on the X axis, and a second test resistor Ry is set in series on the Y axis; the method comprising the steps of: responding to the point touch existing on the resistive touch screen, acquiring a first voltage values Vadcx of the first test resistor Rx and a second voltage values Vadcy of the second test resistor Ry; identifying whether the status of the resistive touch screen is single-point touching or double-point touching according to the magnitude relationship between the first voltage value Vadcx and a first reference voltage value Vadcx_ref, and the magnitude relationship between the second voltage value Vadcy and a second reference voltage value Vadcy_ref; wherein the first reference voltage value Vadcx_ref is the voltage value of the first test resistor Rx when performing single-point touching on the resistive touch screen and generating an electric field on the X axis; the second reference voltage value Vadcy_ref is the voltage value of the second test resistor Ry when performing single-point touching on the resistive touch screen and generating an electric field on the Y axis; responding to the status of the resistive touch screen which is double-point touching, identifying the operation gesture according to the magnitude change trends of the first voltage value Vadcx and the second voltage value Vadcy in the double-point touching process; the operation gesture of double-point touching includes the gesture with no relative motion between the double-point, magnification gesture, shrink gesture and rotation gestures.