Integrated active matrix touch panel
First Claim
1. An integrated touchscreen operable in either one of a self-capacitance touch sensing mode and a mutual-capacitance touch sensing mode and comprising a plurality of display pixels arranged in a two-dimensional matrix of rows and columns, each pixel row having an associated display control line and each pixel column having an associated display data line, each pixel including a pixel electrode, a common electrode and a display control switch for selectively connecting the pixel electrode to the display data line associated with the pixel, the display control switch having a control terminal connected to the display control line associated with the pixel;
- wherein a matrix of touch elements is defined in the display pixels, a touch element encompassing an n×
m group of touch unit cells, each unit cell composed of an k×
j group of display pixels where k denotes the number of rows of pixels and j denotes the number of columns of pixels;
wherein the common electrodes of the display pixels encompassed in the touch unit cell are electrically connected together to form a common electrode for the touch unit cell;
wherein the common electrodes of the unit cells encompassed in the touch element form a common electrode for the touch element;
wherein the touch unit cell includes a conductive lines extending in the row direction and b conductive lines extending in the column direction, where a≤
k and b≤
j and at least one of a and b is non-zero;
wherein each of the (a+b) conductive lines of a unit cell encompassed by a touch element is connected to the respective conductive line of other units cells encompassed by the touch element;
wherein a touch unit cell includes two switching arrangements, one for selectively connecting the common electrode of the touch unit cell to a first touch data line and the other for selectively connecting the common electrode of the touch unit cell to a second touch data line;
and wherein the touchscreen comprises a controller adapted to operate in either one of a self-capacitance touch sensing mode in which, for at least one touch element, the controller applies an excitation voltage to the common electrode of the touch element and senses a signal generated by the touch element and a mutual-capacitance touch sensing mode in which the controller applies an excitation voltage to the common electrode of at least one touch element and determines a signal generated in at least another touch element of the matrix of touch elements.
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Accused Products
Abstract
An integrated touchscreen comprises display pixels arranged in a two-dimensional matrix of rows and columns to minimize the reduction in aperture ratio of the display pixels. A matrix of touch element is defined in the display pixels, with a touch unit cell encompassing a group of display pixels. A touch element is comprised of a matrix of touch unit cells. The common electrodes of the display pixels encompassed in the touch element are electrically connected together to form a common electrode for the touch element. The touch unit cell includes conductive lines extending in the row direction and conductive lines extending in the column direction. The touchscreen comprises a controller that can operate in either one of a self-capacitance touch sensing mode and a mutual-capacitance touch sensing mode.
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Citations
20 Claims
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1. An integrated touchscreen operable in either one of a self-capacitance touch sensing mode and a mutual-capacitance touch sensing mode and comprising a plurality of display pixels arranged in a two-dimensional matrix of rows and columns, each pixel row having an associated display control line and each pixel column having an associated display data line, each pixel including a pixel electrode, a common electrode and a display control switch for selectively connecting the pixel electrode to the display data line associated with the pixel, the display control switch having a control terminal connected to the display control line associated with the pixel;
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wherein a matrix of touch elements is defined in the display pixels, a touch element encompassing an n×
m group of touch unit cells, each unit cell composed of an k×
j group of display pixels where k denotes the number of rows of pixels and j denotes the number of columns of pixels;wherein the common electrodes of the display pixels encompassed in the touch unit cell are electrically connected together to form a common electrode for the touch unit cell; wherein the common electrodes of the unit cells encompassed in the touch element form a common electrode for the touch element; wherein the touch unit cell includes a conductive lines extending in the row direction and b conductive lines extending in the column direction, where a≤
k and b≤
j and at least one of a and b is non-zero;wherein each of the (a+b) conductive lines of a unit cell encompassed by a touch element is connected to the respective conductive line of other units cells encompassed by the touch element; wherein a touch unit cell includes two switching arrangements, one for selectively connecting the common electrode of the touch unit cell to a first touch data line and the other for selectively connecting the common electrode of the touch unit cell to a second touch data line; and wherein the touchscreen comprises a controller adapted to operate in either one of a self-capacitance touch sensing mode in which, for at least one touch element, the controller applies an excitation voltage to the common electrode of the touch element and senses a signal generated by the touch element and a mutual-capacitance touch sensing mode in which the controller applies an excitation voltage to the common electrode of at least one touch element and determines a signal generated in at least another touch element of the matrix of touch elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification