A method for assembling an electro-permanent magnet (EPM) key assembly of an information handling system may comprise disposing a pair of scissor plate mounts framed onto a base contact assembly upward through a cap support plate opening within a cap support plate comprising a printed circuit board with pressure sensors to record keystrokes for mounting the EPM key assembly, operably connecting the base contact assembly to the cap support plate, disposing a ferromagnetic flange operably coupled to rotate with at least one scissor plate about a hinge downward through the cap support plate opening, operably connecting the pair of scissor plates to the base contact assembly such that each of the pair of scissor plates may rotate away from one another in the presence of downward force on a key cap, and situating the key cap atop the pair of scissor plates.

A keyboard device includes a membrane circuit board and a key structure over the membrane circuit board. The key structure includes a keycap, a plunger structure, a key pedestal and an elastic element. The plunger structure is arranged between the keycap and the elastic element. At least a portion of the keycap is disposed within a pedestal dust-storage chamber of the key pedestal. At least a portion of the plunger structure is disposed within a guiding chamber of the key pedestal. Due to the relative location between the keycap, the plunger structure and the key pedestal, the path of the dust to enter the guiding chamber is extended or blocked. Consequently, the dust-proof efficacy is enhanced.

A keyswitch device includes a cap, a board, a first returning member, and a second returning member. The board is disposed opposite to the cap. The first returning member is disposed between the cap and the board and includes a magnet member and a magnetic member for providing a magnetic force. The second returning member is disposed between the cap and the board for providing an elastic force. When the cap is released at a lowest position, the cap moves upward via the elastic member and then arrives and stays at a highest position via the magnetic force.

A keyboard device includes a key structure and a membrane circuit board. The membrane circuit board includes a membrane switch. The membrane switch is located under the key structure. The key structure includes a pedestal structure, a covering structure, a keycap, a connecting element, a dome-type elastomer and a knocking element. The keycap is installed on the covering structure. The connecting element is connected between the covering structure and the pedestal structure. The dome-type elastomer is arranged between the covering structure and the membrane circuit board. When the keycap is not depressed, the knocking element is supported on the connecting element. While the keycap is depressed, the knocking element knocks on the connecting element to generate an operating sound and provide the operating feedback to the user.

A detachable screen key structure mainly includes a key body having a hollow portion, key butting element and screen carrying element, where a key signal connecter is configured in the hollow portion, the screen carrying element is configured with a display element and a key cap is configured on the display element, and the display element is configured with a display butting element adapted to dock the key butting element. Whereby, a user can accommodate the key signal connecter for signal transmission inside the hollow portion so as to increase use beautification. Furthermore, since the display will be connected to the key butting element through the display butting element, the user is allowed to carry out the removal and replacement by themselves, which can increase use convenience.

A keyswitch device includes a cap, a board, a first returning member, and a second returning member. The board is disposed opposite to the cap. The first returning member is disposed between the cap and the board and includes a magnet member and a magnetic member for providing a magnetic force. The second returning member is disposed between the cap and the board for providing an elastic force. When the cap is released at a lowest position, the cap moves upward via the elastic member and then arrives and stays at a highest position via the magnetic force.

Embodiments of the present disclosure provide a display device. The display device includes: a display panel; a control circuit board; and a rotary knob assembly connected to the control circuit board. The rotary knob assembly includes a rotary rod and a rotary knob cap, the rotary rod is connected to the rotary knob cap, and the rotary knob cap is configured to drive the rotary rod to rotate. The display panel is connected to the control circuit board, the rotary knob assembly is configured for generating a signal according to an action of the rotary knob cap and transmitting the signal to the control circuit board, and the control circuit board is configured for controlling the display panel to display according to the signal.

Embodiments of the present disclosure provide a display device. The display device includes: a display panel; a control circuit board; and a rotary knob assembly connected to the control circuit board. The rotary knob assembly includes a rotary rod and a rotary knob cap, the rotary rod is connected to the rotary knob cap, and the rotary knob cap is configured to drive the rotary rod to rotate. The display panel is connected to the control circuit board, the rotary knob assembly is configured for generating a signal according to an action of the rotary knob cap and transmitting the signal to the control circuit board, and the control circuit board is configured for controlling the display panel to display according to the signal.

An operation device includes a housing, an operation member, and a detector. The housing includes an electrically conductive portion on a surface thereof. The operation member is supported by the housing such that the operation member is movable in response to an operation by an operation body, and is configured to be capacitively coupled to the operation body and to the electrically conductive portion. The detector is configured to detect whether the operation body is in proximity to the operation member based on a change in capacitance at the electrically conductive portion.

An operation device includes a housing, an operation member, and a detector. The housing includes an electrically conductive portion on a surface thereof. The operation member is supported by the housing such that the operation member is movable in response to an operation by an operation body, and is configured to be capacitively coupled to the operation body and to the electrically conductive portion. The detector is configured to detect whether the operation body is in proximity to the operation member based on a change in capacitance at the electrically conductive portion.