Patent ID: 8274485
Filing Date: 2012-09-25
Classification: G06F

Abstract:
1. A touch position detection method for use in a touch control device that comprises a touch panel, the touch panel comprising a first conductive layer and a second conductive layer, the first conductive layer comprising a continuous planar structure formed on a first substrate and having first and second ends, the second conductive layer comprising a plurality of elongate conductive strips formed on a second substrate, the elongate conductive strips being substantially parallel to and not engaging each other, each elongate conductive strip having first and second ends, the first and second substrates being spaced from each other by insulation spacers, a control circuit electrically connected to the first and second conductive layers, and a microcontroller electrically connected to the control circuit, the method comprising the following steps: (a) the microcontroller initializing a preset scan detection mode to carry out driving and scan detection on the first conductive layer and the second conductive layer through the control circuit; (b) when detecting a touch operation on the touch panel, determining if the type of touch applied to the touch panel is multiple-point touch, continuous trace, or single-point touch; (c) when the type of touch being determined to be the single-point touch or multiple-point touch, the microcontroller employing a first operation mode to carry out driving on the first conductive layer and the second conductive layer as well as simultaneously performing the scan detection at said second conductive layer to detect the coordinates of the absolute touch position/touch positions, (d) when the type of touch being determined to be the continuous trace, the microcontroller employing a second operation mode to carry out driving on the first conductive layer and the second conductive layer and performing the scan detection at said second conductive layer to detect coordinates of the absolute touch positions of the continuous trace; wherein said control circuit establishes a potential gradient in said first conductive layer or said second conductive layer when it is used as driving layer; (e) determining if the touch operation sustains for a given time period; and (f) returning to step (a) when the touch operation sustains for the given time period.