COMMON ELECTRODE CONNECTIONS IN INTEGRATED TOUCH SCREENS
First Claim
1. An integrated touch screen comprising:
- a stackup of material layers, the stackup including a plurality of display pixels disposed in an active region of the touch screen, each display pixel including a pixel electrode;
a plurality of data lines disposed in the stackup, wherein each pixel electrode is electrically connected to one of the data lines;
a plurality of common electrodes disposed in the stackup, each display pixel being associated with one of the common electrodes;
a plurality of high-resistivity connections between common electrodes, each high-resistivity connection between common electrodes conductively connecting two of the common electrodes;
a pixel material associated with each display pixel, the pixel material being disposed in the stackup;
a display driver that controls voltages of the data lines and the common electrodes to apply a voltage to the pixel material associated with each display pixel, wherein a luminance of each display pixel is controlled based on an amount of the voltage applied to the pixel material; and
a touch controller that applies drive signals to one or more of the common electrodes and that receives sense signals resulting from the drive signals, the sense signals indicating an amount of touch on the touch screen.
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Accused Products
Abstract
Common electrodes (Vcom) of integrated touch screens can be segmented into electrically isolated Vcom portions that can be operated as drive lines and/or sense lines of a touch sensing system. The touch screen can include high-resistivity connections between Vcom portions. The resistivity of the high-resistivity connections can be high enough so that touch sensing and image display can be performed by the touch screen, and the high-resistivity connections can provide an added functionality by allowing a charge build up on one of the Vcom portions to be spread to other Vcom portions and/or discharged from system by allowing charge to leak through the high-resistivity connections. In this way, for example, visual artifacts that result from charge build up on a Vcom portion can be reduced or eliminated.
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Citations
23 Claims
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1. An integrated touch screen comprising:
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a stackup of material layers, the stackup including a plurality of display pixels disposed in an active region of the touch screen, each display pixel including a pixel electrode; a plurality of data lines disposed in the stackup, wherein each pixel electrode is electrically connected to one of the data lines; a plurality of common electrodes disposed in the stackup, each display pixel being associated with one of the common electrodes; a plurality of high-resistivity connections between common electrodes, each high-resistivity connection between common electrodes conductively connecting two of the common electrodes; a pixel material associated with each display pixel, the pixel material being disposed in the stackup; a display driver that controls voltages of the data lines and the common electrodes to apply a voltage to the pixel material associated with each display pixel, wherein a luminance of each display pixel is controlled based on an amount of the voltage applied to the pixel material; and a touch controller that applies drive signals to one or more of the common electrodes and that receives sense signals resulting from the drive signals, the sense signals indicating an amount of touch on the touch screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification