Abstract: Methods are provided for base capacitance compensation of traces in a touchpad sensor. Compensation areas are calculated by evaluating the differences between the base capacitances of the traces, or the differences between the base capacitances of the traces and a target value. The compensation areas are electrically connected to respective traces to equalize the base capacitances of the traces. Alternatively, a relationship between the areas of the traces and the distances from the traces to a grounding layer for equalizing the base capacitances of the traces is derived and from which the areas of the traces or the position of the grounding layer are adjusted.

Abstract: A method for calibrating coordinates of a touch screen includes the steps of: providing a display panel, which includes display coordinates along a first axis and a first axis display coordinate; providing a capacitive sensor, which includes sensing electrodes disposed along the first axis and respectively corresponding to sensing coordinates, wherein capacitive sensor has a maximum sensing coordinate; detecting digital values corresponding to the sensing electrodes when the capacitive sensor is touched; multiplying the digital values by the sensing coordinates corresponding to the sensing electrodes to obtain a weighting value; dividing the weighting value by the maximum sensing coordinate to obtain an interpolated value; and multiplying the interpolated value by the first axis display coordinate to obtain a calibrated coordinate.

Abstract: An illuminated touch sensitive surface module includes a sensor, an illuminated device and a controller. The sensor senses position information of hovering or touching objects, the illuminated device includes illuminated modes and one or more light guide films with characters, symbols or patterns, and the controller connects to the sensor and the illuminated device for controlling the illuminated modes of the illuminated device and the illumination of the light sources according to the position information.

Abstract: A method for calibrating coordinates of a touch screen includes the steps of: providing a display panel, which includes display coordinates along a first axis and a first axis display coordinate; providing a capacitive sensor, which includes sensing electrodes disposed along the first axis and respectively corresponding to sensing coordinates, wherein capacitive sensor has a maximum sensing coordinate; detecting digital values corresponding to the sensing electrodes when the capacitive sensor is touched; multiplying the digital values by the sensing coordinates corresponding to the sensing electrodes to obtain a weighting value; dividing the weighting value by the maximum sensing coordinate to obtain an interpolated value; and multiplying the interpolated value by the first axis display coordinate to obtain a calibrated coordinate.

Abstract: A touchpad has a substrate; and a single trace layer formed on the substrate. The single trace layer has a single trace layer including rows of conductive traces. Each conductive trace has a gradual change resistance according to a distance far away from one end.

Abstract: A touch control bar with button function comprises a plurality of scroll sensor areas and at least a button sensor area disposed between two adjacent ones of the scroll sensor areas. On the touch control bar, a virtual button is defined over an area covering at least a button sensor area. The gesture on the touch control bar will determine which function between button and scroll is to be performed.

Abstract: Methods are provided for base capacitance compensation of traces in a touchpad sensor. Compensation areas are calculated by evaluating the differences between the base capacitances of the traces, or the differences between the base capacitances of the traces and a target value. The compensation areas are electrically connected to respective traces to equalize the base capacitances of the traces. Alternatively, a relationship between the areas of the traces and the distances from the traces to a grounding layer for equalizing the base capacitances of the traces is derived and from which the areas of the traces or the position of the grounding layer are adjusted.

Abstract: For a compensation to the sensed capacitive values of a touchpad sensor, the variance profile of the base capacitance or the sensed capacitive values of the traces in the touchpad sensor is determined, and then a firmware operation based on the variance profile is carried out to modify the sensed capacitive values or the position value when an object touches on the touchpad sensor, such that the touchpad sensor operates as a symmetrical touchpad sensor does.

Abstract: A touch sensor comprises a plurality of traces in a same sensing layer or in different sensing layers, and the base capacitances of the traces are made uniform by connecting one or more compensation areas to one or more of the traces or selecting the distances between the grounding layer and one or more of the traces. The compensation area and the trace it compensates may or may not in a same layer.

Abstract: A touchpad having capability of inducing sensation of tactile key comprises a deformable cover provided over a sensor, the deformable cover having a key region. The deformable cover is presented as a flat shape or curved shape. The key region is provided with a projecting structure, recessed structure, or flat structure. Preferably, the key region is provided thereon with a pattern representative of a key. Alternatively, the touchpad further comprises a support member provided between the deformable cover and the sensor. Preferably, the support member is provided underneath the key region with a recess.

Abstract: A wrench includes a drive head having an opening and a number of notches each having an inclined surface. The inclined surfaces each has one end located closer to the center of the head and the other end distal to the center of the head. A barrel is rotatably received in the head and has a bore for receiving a fastener and has a number of channels for receiving a drive insert each. The sliding engagement of the drive inserts with the inclined surfaces of the head may adjust the drive inserts into and out of the bore of the barrel to engage with fasteners of different sizes.