An input device includes a structural frame, a touch pad, a piezoelectric sheet fixed on the touch pad, and a controller electrically connected to the touch pad and the piezoelectric sheet. The touch pad has a first side, a second side opposite to the first side, and a touch-sensitive surface that has a button area located at the second side. The touch pad can be elastically deflected to move the second side relative to the structural frame. The piezoelectric sheet generates a voltage when the touch pad is elastically deflected. When determining that a press is performed on the button area and the voltage is larger than or equal to a corresponding predetermined value, the controller sends out a trigger signal. An electronic apparatus with the input device includes a display screen and a processor. The processor receives the trigger signal to control the display screen to display images.

Disclosed are an inductive force sensor and a method of operating the same. An inductive force sensor according to an embodiment of the present invention includes a reference resonance circuit, a first resonance circuit, and a determination circuit configured to obtain information about a first resonant frequency, attributable to first inductance due to an inductive coil based on the displacement between a target and the inductive coil formed by an external force input in a Z-axis direction, and a reference resonant frequency. The determination circuit determines the displacement of the target and the external force in the Z-axis direction based on the first resonant frequency and the reference resonant frequency.

A device may include a display portion that includes a display housing and a display at least partially within the display housing. The device may also include a base portion pivotally coupled to the display portion and including a bottom case, a top case coupled to the bottom case and defining an array of raised key regions, and a sensing system below the top case and configured to detect an input applied to a raised key region of the array of raised key regions.

A device may include a display portion that includes a display housing and a display at least partially within the display housing. The device may also include a base portion pivotally coupled to the display portion and including a bottom case, a top case coupled to the bottom case and defining an array of raised key regions, and a sensing system below the top case and configured to detect an input applied to a raised key region of the array of raised key regions.

A sensing system for a keyboard. Each key sensor comprises passive and active resonant circuits. The passive resonant circuit has a resonant frequency and the active resonant circuit excites the passive resonant circuit at the resonant frequency. A sensor driver drives the active resonant circuit with an RF drive signal, a multiplexing system multiplexes the drive signal such that simultaneously driven key sensors are separated by at least (k1) keys, and a detector detects a level of RF signal from a driven key sensor for sensing a position and/or velocity of a key.

A device may include a display portion that includes a display housing and a display at least partially within the display housing. The device may also include a base portion pivotally coupled to the display portion and including a bottom case, a top case coupled to the bottom case and defining an array of raised key regions, and a sensing system below the top case and configured to detect an input applied to a raised key region of the array of raised key regions.

A device may include a display portion that includes a display housing and a display at least partially within the display housing. The device may also include a base portion pivotally coupled to the display portion and including a bottom case, a top case coupled to the bottom case and defining an array of raised key regions, and a sensing system below the top case and configured to detect an input applied to a raised key region of the array of raised key regions.

In some examples, techniques are provided for quick haptic feedback, without the use of a controller, which is local to individual, non-actuating keys, such as keys of a thin keyboard or keypad. The haptic feedback may be in the form of a simulated key-click feedback for an individual key that is pressed by a user such that the finger used to press the key feels the tactile sensation. The haptic feedback mimics the tactile sensation of a mechanical key (e.g., buckling spring, pop-dome key switch) to give a user the perception that they have actuated a mechanically movable key.

An electronic device tracking assembly for locating a misplaced electronic device includes a case that may contain an electronic device. A location unit is provided and the location unit is coupled to the case. The location unit selectively emits an audible alert thereby facilitating the case to be located. A remote unit is provided and the remote unit is selectively carried. The remote unit is selectively turned on when the electronic device is misplaced. Moreover, the remote unit turns the location unit on when the remote unit is turned on.

An electronic device tracking assembly for locating a misplaced electronic device includes a case that may contain an electronic device. A location unit is provided and the location unit is coupled to the case. The location unit selectively emits an audible alert thereby facilitating the case to be located. A remote unit is provided and the remote unit is selectively carried. The remote unit is selectively turned on when the electronic device is misplaced. Moreover, the remote unit turns the location unit on when the remote unit is turned on.