Abstract: An electrotactile apparatus has an electrode-array unit and a driver unit for generating a haptic feedback to a user. The electrode-array unit uses electrodes to electro-stimulate the user's skin with pulsed voltage signals generated by the driver unit, inducing excitation currents flowing in the user to generate the haptic feedback. The driver unit is self-powered or wirelessly powered for supporting untethered electrotactile stimulation to the user. A common counter electrode installed on the driver unit contacts the user's skin and collects the excitation currents returned from the user. Advantageously, the common counter electrode is located on an outer surface of the driver unit and the driver unit is substantially flexible, facilitating the common counter electrode to seamlessly contact the user's skin for achieving a stable electrode-skin interface while positioning the driver unit as a whole on the user's skin to provide untethered virtual touching experience to the user.

Abstract: An integrated device for rapid detection of SARS-CoV-2 is disclosed. The integrated device includes a front-end system, a back-end system, and a microfluidic channel. The front-end system includes a detection region and a control region. The detection region and the control region have similar structures, each including an interdigital electrode and a graphene film. The microfluidic channel is arranged to cover the detection region so as to allow the interdigital electrode of the detection region to be exposed to the breath sample. The graphene film of the detection region has a surface resistance higher than that of the graphene film of the control region when the detection region is exposed to a selected virus. The back-end system is configured to detect and compare the surface resistance of the graphene films of the detection region and the control region for determining whether the selected virus is present in the breath sample.

Abstract: An electrotactile apparatus has an electrode-array unit and a driver unit for generating a haptic feedback to a user. The electrode-array unit uses electrodes to electro-stimulate the user's skin with pulsed voltage signals generated by the driver unit, inducing excitation currents flowing in the user to generate the haptic feedback. The driver unit is self-powered or wirelessly powered for supporting untethered electrotactile stimulation to the user. A common counter electrode installed on the driver unit contacts the user's skin and collects the excitation currents returned from the user. Advantageously, the common counter electrode is located on an outer surface of the driver unit and the driver unit is substantially flexible, facilitating the common counter electrode to seamlessly contact the user's skin for achieving a stable electrode-skin interface while positioning the driver unit as a whole on the user's skin to provide untethered virtual touching experience to the user.

Abstract: A garment to be worn directly on the upper body of a person is formed from fabric and includes a flexible printed circuit board and a number of mounting points for electrocardiogram (ECG) electrodes to which ECG electrodes can be releasably attached. For each mounting point, a wire is embedded in the fabric. Each of the wires can electrically connect an ECG electrode attached to the respective mounting point to the flexible printed circuit board. The flexible printed circuit board includes processing circuitry configured for evaluating signals received via the wires from ECG electrodes attached to the mounting points to obtain results and further configured for transmitting the results to an external receiver. A system can include a garment and an external receiver in the form of a mobile device.

Abstract: In a handwriting recognition system, a fingertip-motion sensing device has first and second body parts respectively wearable on a distal phalanx and a proximal phalanx of a finger, and a bendable bridge connecting the two body parts. An accelerometer module in the first body part generates acceleration data of the fingertip motion whereas a battery module powering the accelerometer module is in the second body part, avoiding the first body part to be loaded with the battery module so as to reduce hindrance to a user in handwriting. The bridge is wavily shaped, enabling it to be extensible and retractable to avoid spurious interference generation due to unintended movement between the first body part and the distal phalanx. The sensing device wirelessly transmits the acceleration data to a computing device, which analyzes the acceleration data to determine handwritten characters by using a machine-learning classifier, preferably a convolutional neural network.

Abstract: The present invention provides a stretchable and flexible multi-leads ECG monitoring apparatus having a primary circuitry encased in a thin and flexible polymer patch configured to be worn on a human body. At least four flexible leads are connected to the primary circuitry at a first end and are configured to be connected to ECG electrode patches at a second end. The ECG electrode patches being configured to be attached to a plurality positions on a human body. The wireless transmitter is configured to transmit the ECG monitoring signals to a receiving device for recording or displaying the ECG monitoring signal.