Abstract: A touchscreen display assembly has a substrate and a plurality of electrodes distributed across at least an active area of the substrate. At least one of the electrodes comprises a group of redundant electrode lines electrically coupled to an external electrical circuit connection and further coupled to one another remote from the external electrical circuit connection.

Abstract: A touchscreen display assembly has an array of first electrodes distributed across an active area of the touchscreen display assembly such that the density of first electrodes increases in a first direction across the touchscreen. An array of second electrodes is distributed across an active area of the touchscreen display assembly such that the density of second electrodes decreases in the first direction across the touchscreen. The position in the first direction of an input on the touchscreen can be determined by the proportion of first and second electrodes density in the area of the input.

Abstract: Some embodiments include apparatus and methods to test a device having a driving layer and a sensing layer. A test signal is applied to electrodes of the driving layer in a capacitive load state, with a capacitive load applied, and in an ambient state, without a capacitive load applied. Measured values are obtained at the sensing layer for each state. The measured values are compared with threshold values. A report is generated when a measured value violates a threshold. In one embodiment, the driving layer and the sensing layer form multiple capacitive electrodes within a touch sensor. The measured values are related to mutual capacitance values of the touch sensor.

Abstract: A capacitive touch sensor providing an automatic switch-off function for an apparatus in which the sensor is incorporated is provided. The sensor comprises a sensing element coupled to a capacitance measurement circuit for measuring the capacitance of the sensing element. A control circuit is operable to determine from the capacitance measurement whether an object is in proximity with the sensor. The determined presence of an object may be used to toggle a function of the apparatus. Furthermore, when it is determined that an object has not been in proximity with the sensor for a predetermined time duration, an output signal for switching off the apparatus is provided. The predetermined time duration may be selected from a number of predefined time durations, or may be programmed using an resistor-capacitor network. Pulses may be applied to the control circuit to override features of the automatic switch-off functionality.