Some embodiments of the present disclosure provide a signal processing system, a chip and an active stylus. The signal processing system includes: a pre-amplifier circuit, configured to pre-amplify a received DSSS signal and output a pre-amplified DSSS signal; a low-pass filter circuit, configured to filter the pre-amplified DSSS signal and output a filtered DSSS signal; an analog-to-digital converter circuit, configured to sample the filtered DSSS signal and output a sampled DSSS signal; a noise detecting and filtering-out circuit, configured to filter out a noise in the sampled DSSS signal and output a noise-filtered DSSS signal; and a digital demodulation circuit, configured to demodulate the noise-filtered DSSS signal to output a demodulated signal. The signal processing system can have strong anti-interference ability and high sensitivity through the noise detecting and filtering-out circuit and automatically controlling a gain of the pre-amplifier circuit.

Methods and systems for determining a displacement of a peripheral device are provided. In one example, a peripheral device comprises: an image sensor, and a hardware processor configured to: control the image sensor to capture a first image of a surface when the peripheral device is at a first location on the surface, the first image comprising a feature of the first location of the surface; execute a trained machine learning model using data derived from the first image to estimate a displacement of the feature between the first image and a reference image captured at a second location of the surface; and determine a displacement of the peripheral device based on the estimated displacement of the feature.

An information processing device includes: an acquisition unit and an association unit. The acquisition unit acquires first information, generated by processing a detection result which is output from a first sensor provided outside an electronic writing instrument, which includes a trajectory traced by the electronic writing instrument in writing of an object on a display image and second information, generated by processing a detection result which is output from a second sensor provided in the electronic writing instrument to detect a movement of the electronic writing instrument, which includes a trajectory traced by the electronic writing instrument in writing of the object on the display image. The association unit associates the object with the electronic writing instrument using the first information and the second information.

A stylus control circuit used to control a stylus includes a positioning signal generator. The positioning signal generator is used to generate a first positioning signal having a first frequency and transmit the first positioning signal to the stylus through a first positioning transmission electrode. Wherein, the first frequency corresponds to a position of the first positioning transmission electrode, and the first positioning signal is a frequency signal without carrying any digital data.

Methods and systems for transparent user-interfaces are described herein. A computing device may generate an overlay that is transparent and positionable on top of a window of a user interface. The overlay may include visible content of an application different than another application of the window. Based on the visible content of the application and content of the another application, the computing device may determine a location of the overlay relative to the window. The computing device may provide, based on the determined location, the overlay on top of the window, so as to display the visible content of the application in a nonoverlapping fashion with the content of the another application to display and enable use of multiple applications with one window.

Methods and systems for transparent user-interfaces are described herein. A computing device may generate an overlay that is transparent and positionable on top of a window of a user interface. The overlay may include visible content of an application different than another application of the window. Based on the visible content of the application and content of the another application, the computing device may determine a location of the overlay relative to the window. The computing device may provide, based on the determined location, the overlay on top of the window, so as to display the visible content of the application in a nonoverlapping fashion with the content of the another application to display and enable use of multiple applications with one window.

A wheel device is applied to a mouse and includes a supporter, a wheel module, a lighting unit and a sheltering component. The wheel module includes a wheel axle, an encoder and a wheel component. The wheel axle includes an axle body, a wheel surface and a wheel frame. The axle body is rotatably disposed on the supporter and on center of the wheel frame. The wheel surface is located on an outer surface of the wheel frame. The encoder is connected to the axle body to detect rotation parameters of the wheel axle. The wheel component covers the wheel surface. The lighting unit is disposed on the supporter and inside the wheel frame, and emits an illumination beam to the wheel module. The sheltering component is disposed on the supporter and covers the lighting unit to prevent the illumination beam from leakage through two sides of the wheel component.

An active stylus is provided, which can reduce battery power consumption and reduce the time required for its signal transmission. A position detection device includes a tablet and the stylus having a built-in power source, which are capable of bi-directional transmission and reception of signals through capacitive coupling therebetween. The tablet is configured to transmit a trigger signal US_trg and then transmit a command signal US_cmd to the stylus. The trigger signal US_trg causes the stylus to start its command information receiver to receive the command signal US_cmd including information for controlling the stylus.

A flexible mat (2), optionally to be used for, but not limited to, a pointing device (1) arranged to control the movement of a pointer/cursor on a monitor/display at, for example, a computer or similar electronic device, can include a plurality of links (11a-z) arranged side by side and where these links are substantially rigid in their axial direction and mutually rotatable at a limited angle. The the links (11a-z) can include, or are made of, a substantially disc-shaped material or a foil, that at least one link (11a-z) is provided with a base portion (16a) extending in the longitudinal/axial direction of the link (11a-z), that the link the base portion (16a) of the link (11a-z), and that the coupling elements (15a-z) are integrated with or in the base portion of the link (16a).

A piezo haptic keyboard and touchpad user identification system may comprise a processor receiving an authenticating user input identifying an authorized user of the information handling system, and a controller operably connected to a plurality of piezo electric elements situated beneath the keyboard. The controller may detect haptic hardware typing or touch behavior parameters describing characteristics of a plurality of deformations of the piezo electric elements during interaction between the authorized user and the keyboard, and the processor may use machine learning to identify a repeated pattern of values for a combination of the haptic hardware typing or touch behavior parameters reoccurring during interaction between the authorized user and keyboard. The processor may associate the repeated pattern of values for the combination of the haptic hardware typing or touch behavior parameters with the authorized user for later, passive authentication of a user based on typing dynamics.