Computing devices and methods for producing vibrations in computing devices are disclosed. In one example, a computing device comprises a chassis that includes a trackpad comprising a printed circuit board. A haptic actuator assembly comprises at least one conductive coil formed on or affixed to the printed circuit board, and at least one magnet rigidly affixed to the chassis. The magnet is spaced from and not mechanically coupled to the at least one conductive coil. A memory stores instructions executable by a processor to receive a haptic event requests, determine that the trackpad is not in use, and at least on condition of receiving the haptic event request and determining that the trackpad is not in use, cause a driver signal to be sent to the conductive coil(s) to cause the at least one magnet to produce user-perceptible vibrations in the chassis beyond the trackpad.

A display device includes a display panel and an input sensing part disposed on the display panel. The input sensing part includes first sensing electrodes extending in a first direction and arranged in a second direction crossing the first direction, first lines connected to the first sensing electrodes, second sensing electrodes extending in the second direction and arranged in the first direction, and second lines connected to the second sensing electrodes. The second lines include second-first lines defined as j-th to k-th second lines, and the first lines are connected to the second-first lines.

A touch electrode structure and a manufacture method thereof, a touch panel, and an electronic device are provided. The touch electrode structure includes a first touch electrode and a second touch electrode intersecting with each other to form a mutual capacitance for touch detection; the first touch electrode is longer than the second touch electrode; the first touch electrode includes a first hollow region, the second touch electrode includes a second hollow region, and a hollow area of the first touch electrode is greater than that of the second touch electrode; and the touch electrode structure further includes at least one first dummy electrode, which is within the first hollow region and is arranged in a same layer as at least part of the first touch electrode, and they are insulated from each other.

A display device including: a pixel part including pixels; a sensor part overlapping the pixel part and including sensors; and a sensor driver that transmits a sensing signal to p sensors in a first area of the sensor part in a first mode, transmits the sensing signal to q sensors in the first area in a second mode, and transmits the sensing signal to r sensors in the first area in a third mode, wherein p is an integer greater than 0, q and r are integers greater than p, and the sensor driver sets a sensing frequency, the first area, the number of sensing times per sensing frame period, whether or not the sensor driver is synchronized with a timing signal of the pixel part, or a voltage level of the sensing signal, to be different in the second mode and the third mode.

A capacitive touch screen display operates by: providing a display configured to render frames of data into visible images; providing a plurality of electrodes integrated into the display to facilitate touch sense functionality based on electrode signals having a drive signal component and a receive signal component; generating, via a plurality of drive-sense circuits coupled to at least some of the plurality of electrodes, a plurality of sensed signals; receiving the plurality of sensed signals; generating capacitance image data associated with the plurality of cross points that includes capacitance variation data corresponding to variations of the capacitance image data from a nominal value; and processing the capacitance image data to determine a touchless indication proximal to the touch screen display based on a touchless indication threshold.

A proximity sensor is arranged with a first electrode input with a first signal, a second electrode input with a second signal different from the first signal, a third electrode arranged closer to the first electrode than the second electrode, and the second signal has a reverse phase of the first signal.

Touch sensor panels (or touch screens) can improve signal-to-noise ratio (SNR) using touch electrode patterns for differential drive and/or differential sense techniques. In some examples, a touch sensor panel can include a two-dimensional array of touch nodes formed from a plurality of touch electrodes. Each column (or row) of touch nodes can be driven with a plurality of drive signals. For example, a first column (or row) of touch nodes can be driven by a first drive signal applied to one or more first touch nodes in the first column (or row) and a second drive signal applied to a one or more second touch nodes of the first column (or row). In some examples, the first drive signal and the second drive signal can be complimentary drive signals. In some examples, each row (or column) of touch electrodes can be sensed by differential sense circuitry.

Apparatuses and methods of multi-phase scanning of a touch panel are described. One apparatus selects a sequence having a number of one values, negative one values, and zero values. The one values correspond to an in-phase drive signal, the negative one values correspond to an opposite-phase drive signal, and the zero values correspond to a reference signal (e.g., reference voltage or ground). A sum of the sequence is equal to zero. The apparatus applies one of the in-phase drive signal, the opposite-phase drive signal, or the reference signal to each of a first set of electrodes at a first stage according to the sequence. The apparatus rotates the sequence to obtain a rotated sequence and applies one of the signals according to the rotated sequence. The apparatus receives sense signals to detect a presence of an object on the touch panel.

An electronic device according to an embodiment comprises: a display; a display-driving integrated circuit (IC) set to apply one or more driving signals to the display; a touch sensor including a plurality of electrodes; and a touch sensor IC configured to check an input position on the touch sensor, wherein the touch sensor IC is configured to: acquire, from the display-driving IC, a first vertical synchronization signal from among the one or more driving signals, provide a plurality of first measurement signals corresponding to a first phase at intervals of a first duration to at least a first portion of electrodes among the plurality of electrodes based on the acquisition of the first vertical synchronization signal, and, after providing the plurality of first measurement signals, provide a plurality of second measurement signals corresponding to a second phase, different from the first phase, at intervals of the first duration to at least a second portion of electrodes among the plurality of electrodes, wherein at least a portion of the application period of the plurality of first driving signals and the plurality of second driving signals can overlap with at least a portion of the application period of the one or more driving signals.

There is provided a capacitive touch device including a touch panel and a control chip. The touch panel includes detection electrodes configured to form self-capacitance and mutual-capacitance. The control chip includes an emulation circuit and a subtraction circuit. The emulation circuit is configured to output a reference signal. The subtraction circuit is coupled to the emulation circuit and the detection electrode, subtracts the reference signal outputted by the emulation circuit from a detected signal outputted by the detection electrodes to output a differential detected signal, and identifies a touch event according to the differential detected signal to reduce the power consumption for touch detection.