Tactile interface comprising a panel (1) having an interactive surface (2) with one or a plurality of exterior elements, comprising a plurality of interactive areas (Z1, Z2, Z3, Z4) arranged relative to one another, such that they cover substantially the whole of the interactive surface (2) and a plurality of actuators (A1, A2, A3, A4) in contact with the panel, control means (6) of actuators configured to send control signals to the actuators, comprising means for calculating (8) said control signals, said calculating means (8) executing an inverse filtering operation, so as to emit, from a desired displacement or displacements of one or more interactive areas (Z1, Z2, Z3, Z4), control signals compensating at least partially the distortion, reverberation and propagation of waves.

An apparatus may include an ultrasonic sensor system, a low-frequency vibration source and a control system. The ultrasonic sensor system may include an ultrasonic receiver and an ultrasonic transmitter configured for transmitting ultrasonic waves in a first frequency range (e.g., 1 MHz to 30 MHz). The low-frequency vibration source may be configured for generating low-frequency vibrations in a second frequency range (e.g., the range of 5 Hz to 2000 Hz). The control system may be configured for synchronizing the generation of the first low-frequency vibrations and the transmission of the first ultrasonic waves.

The present invention provides an ultrasonic fingerprint recognition module and a display panel. Advantages of the present invention are that a vibration absorbing layer can absorb mechanical energy of a piezoelectric thin film layer such that a number of cycles of later ultrasound is significantly reduces to extremely increase a vertical resolution of ultrasound fingerprint recognition and overall recognition effect and precision.

A portable information handling system commands a stylus to vibrate to aid in location of the stylus. The stylus vibrates at a frequency selected from a range of plural frequencies based upon a distance between the portable information handling system and stylus so that an audible noise is generated by the stylus with sufficient sound to be heard by a user of the portable information handling system while minimizing stylus power consumption. In one embodiment, a haptic film at the stylus exterior surface and/or a speaker of information handling system generates an ultrasonic sound detectable by a microphone of the information handling system and/or the stylus for determining a distance between the information handling system and the stylus.

Acoustic touch detection (touch sensing) system architectures and methods can be used to detect an object touching a surface. Position of an object touching a surface can be determined using time-of-flight (TOF) bounding box techniques, or acoustic image reconstruction techniques. Acoustic touch sensing can utilize transducers, such as piezoelectric transducers, to transmit ultrasonic waves along a surface and/or through the thickness of an electronic device. Location of the object can be determined, for example, based on the amount of time elapsing between the transmission of the wave and the detection of the reflected wave. An object in contact with the surface can interact with the transmitted wave causing attenuation, redirection and/or reflection of at least a portion of the transmitted wave. Portions of the transmitted wave energy after interaction with the object can be measured to determine the touch location of the object on the surface of the device.

An optical display, including a first waveguide having a first set of surfaces, an input grating, a fold grating, and an output grating; an image input image node assembly; and a prismatic relay optics is provided. The prismatic relay optics may be configured to be optomechanically connected to the waveguide and the input image node assembly. The optical display is may also be configured to operate alone or as integrated with a headpiece to be used as a HUD. The HUD may have a first and a second configuration wherein the waveguide is decoupled or coupled.

An indicator identifying a force intensity of a touch input provided on a touch input surface is received. It is determined that the touch input is associated with an audio volume control. An audio volume is controlled based at least in part on the indicator identifying the force intensity of the touch input.

A touch pad pressure detection method and apparatus, a storage medium and a computer device, wherein the method comprises: by means of an elastic wave sensor arranged below a touch pad, detecting a pressing operation on a touch pad to obtain a voltage signal; and determining pressure on the basis of the voltage signal.

A signal to be used to propagate a propagating signal through a propagating medium with a touch input surface is sent. The propagating signal has been allowed to propagate through the propagating medium to a plurality of receivers coupled to the propagating medium. A received signal affected by a contact contacting the touch input surface is received. At least a portion of the received signal is compared with one or more reference signal signatures.

An apparatus comprising: an image processor configured to determine at least one image parameter with respect to at least one image displayed on at least one display; a touch controller configured to determine at least one touch parameter with respect to the at least one display configured to display the at least one image; and a tactile effect generator configured to generate at least one tactile signal based on the at least one touch parameter and the at least one image parameter.