Method for detecting touch points of touch control device
AssigneeTPK Touch Solutions Inc.
InventorsChen-Yu Liu, Chun-Chi Lin
Life of this patent
Estimating the term…
Abstract
A method for detecting touch points of touch control device is disclosed. The touch control device comprises a first substrate having a first conductive layer and a second substrate having a second conductive layer. The first and second conductive layers are respectively connected to a control circuit which is coupled to a microcontroller. The control circuit performs driving on the first conductive layer to generate a gradient potential, and performs scanning on the second conductive layer to determine a first-axis coordinates. Then the control circuit drives the second conductive layer to generate a gradient potential, and performs scanning on the first conductive layer to determine the second-axis coordinates.
Claims14
A method for sensing at least one touch position of a touch control device, the touch control device comprising a first substrate having a first conductive layer and a second substrate having a second conductive layer opposite to the first conductive layer of the first substrate, the first conductive layer having a plurality of spaced and parallel elongate conductive strips along a first axis, each of the elongate conductive strips having a first end and a second end, the first end and second end of the elongate conductive strips being connected to a control circuit, the second conductive layer having a plurality of spaced and parallel elongate conductive strips along a second axis, each of the elongate conductive strips having a first end and a second end, the first end and second end of the elongate conductive strips of the second conductive layer being connected to the control circuit, the method comprising:
- (a) the control circuit applying a driving voltage to the first ends of the elongate conductive strips of the first conductive layer, the second ends of the elongate conductive strips of the first conductive layer being connected to a predetermined potential such that a gradient potential is formed on the elongate conductive strips of the first conductive layer;
- (b) pressing the first substrate at at least one touch position and causing the first conductive layer to contact the second conductive layer, and thereby applying the driving voltage on the first conductive layer to the second conductive layer at a position corresponding to the touch position;
- (c) the control circuit performing scanning on the second conductive layer and determining a first-axis coordinate of the touch position;
- (d) the control circuit applying a driving voltage to the first ends of the elongate conductive strips of the second conductive layer, and the second end of the elongate conductive strips of the second conductive layer being connected to a predetermined potential such that a gradient potential is formed at the elongate conductive strips of the second conductive layer;
- (e) when at least one touch position of the touch control device is pressed, the first conductive layer contacting the second conductive layer at the touch position and the second conductive layer applying a driving voltage at a corresponding position to the first conductive layer;
- (f) the control circuit performing scanning on the first conductive layer and determining a second-axis coordinate of the touch position;
- and
- (g) repeating steps (a) to (f).
A method for sensing at least one touch position of a touch control device, the touch control device comprising a first substrate having a first conductive layer and a second substrate having a second conductive layer opposite to the first conductive layer of the first substrate, the first conductive layer having a first end and a second end, the first end and second end of the first conductive layer being connected to a control circuit, the second conductive layer having a plurality of spaced and parallel elongate conductive strips along a second axis, each of the elongate conductive strips having a first end and a second end, the first end and second end of the elongate conductive strips of the second conductive layer being connected to the control circuit, the method comprising:
- (a) the control circuit applying a driving voltage to the first end of the first conductive layer, the second end of the first conductive layer being connected to a predetermined potential such that a gradient potential is formed on the first conductive layer;
- (b) pressing the first substrate at at least one touch position and causing the first conductive layer to contact the second conductive layer, and thereby applying the driving voltage on the first conductive layer to the second conductive layer at a position corresponding to the touch position;
- (c) the control circuit performing scanning on the second conductive layer and determining a first-axis coordinate of the touch position;
- (d) the control circuit applying a driving voltage to the first ends of the elongate conductive strips of the second conductive layer, and the second end of the elongate conductive strips of the second conductive layer being connected to a predetermined potential such that a gradient potential is formed at the elongate conductive strips of the second conductive layer;
- (e) when at least one touch position of the touch control device is pressed, the first conductive layer contacting the second conductive layer at the touch position and the second conductive layer applying a driving voltage to the first conductive layer at a corresponding position;
- (f) the control circuit performing scanning on the first conductive layer and determining a second-axis coordinate of the touch position;
- and
- (g) repeating steps (a) to (f).
Dependencies are inferred from the claim text.