Sensor fusion algorithm techniques are described. In one or more embodiments, behaviors of a host device and accessory devices are controlled based upon an orientation of the host device and accessory devices, relative to one another. A combined spatial position and/or orientation for the host device may be obtained based on raw measurements that are obtained from at least two different types of sensors. In addition, a spatial position and/or orientation for an accessory device is ascertained using one or more sensors of the accessory device. An orientation (or position) of the accessory device relative to the host computing device may then be computed based on the combined spatial position/orientation for the host computing device and the ascertained spatial position/orientation for the accessory device. The relative orientation that is computed may then be used in various ways to control behaviors of the host computing device and/or accessory device.

The present application provides a key circuit, wherein the circuit includes: a plurality of keys, a plurality of driving lines, a plurality of induction lines and a control module, wherein the plurality of keys are divided into a plurality of regions according to parameters affecting force and resistance response, and resistance of the keys in each region changes with pressure within the same range; each key is connected to one driving line and one induction line, and keys in the same region are connected to the same induction line; and the plurality of driving lines and the plurality of induction lines are all connected to I/O interfaces of the control module, and are configured to transmit acquired resistance information of corresponding keys to the control module, so as to output control information corresponding to the keys via the control module.

One variation for a seamless touch sensor includes: a substrate, a baseplate, a haptic actuator, a cover layer, and a controller. The substrate includes: a top layer including a set of drive and sense electrode pairs; and a bottom layer including an array of force sensors. The baseplate: is arranged below the substrate; and including an array of spring elements coupling the baseplate to the substrate. The haptic actuator is arranged below the substrate and includes: a multi-layer inductor; and a first magnetic element facing the multi-layer inductor. The cover layer is arranged over the substrate to define a continuous surface defining an active region and a inactive touch region. The controller is configured to drive an oscillating voltage across the multi-layer inductor to: induce alternating magnetic coupling between the multi-layer inductor and the magnetic element; and oscillate the active touch region of the cover layer relative to the magnetic element.

One variation of a touch sensor system includes a set of touch layers: spanning a first area; and including a set of electrodes. The system further includes a set of inductor layers: arranged below the set of touch layers; spanning a second area less than the first area; and including a set of spiral traces defining an inductor. The system also includes a magnetic element arranged below the set of inductor layers and defining a first polarity facing the inductor. The system further includes a controller configured to: read a set of electrical values from the set of electrodes; interpret a force magnitude of a touch input based on the set of electrical values; and in response to the force magnitude exceeding a force magnitude, drive an oscillating voltage across the inductor to induce alternating magnetic coupling between the inductor and the magnetic element.

One variation of a system for a haptic actuator includes: a substrate; a baseplate; a magnetic element; and a set of spacer elements. The substrate includes: a first layer including a first spiral trace coiled in a first direction; and a second layer. The second layer is arranged below the first layer and includes a second spiral trace: coiled in a second direction opposite the first direction; and coupled to the first spiral trace to form an inductor. The substrate further includes terminals arranged about a periphery of the substrate and coupled to the inductor. The baseplate is arranged opposite the substrate. The magnetic element is: arranged on the baseplate; and defines a first polarity facing the inductor. The first set of spacer elements are: interposed between the baseplate and the substrate; arranged proximal edges of the baseplate; and defines a nominal gap between the magnetic element and the inductor.

One variation for a seamless touch sensor includes: a substrate, a baseplate, a haptic actuator, a cover layer, and a controller. The substrate includes: a top layer including a set of drive and sense electrode pairs; and a bottom layer including an array of force sensors. The baseplate: is arranged below the substrate; and including an array of spring elements coupling the baseplate to the substrate. The haptic actuator is arranged below the substrate and includes: a multi-layer inductor; and a first magnetic element facing the multi-layer inductor. The cover layer is arranged over the substrate to define a continuous surface defining an active region and a inactive touch region. The controller is configured to drive an oscillating voltage across the multi-layer inductor to: induce alternating magnetic coupling between the multi-layer inductor and the magnetic element; and oscillate the active touch region of the cover layer relative to the magnetic element.

One variation of a system for a haptic actuator includes: a substrate; a baseplate; a magnetic element; and a set of spacer elements. The substrate includes: a first layer including a first spiral trace coiled in a first direction; and a second layer. The second layer is arranged below the first layer and includes a second spiral trace: coiled in a second direction opposite the first direction; and coupled to the first spiral trace to form an inductor. The substrate further includes terminals arranged about a periphery of the substrate and coupled to the inductor. The baseplate is arranged opposite the substrate. The magnetic element is: arranged on the baseplate; and defines a first polarity facing the inductor. The first set of spacer elements are: interposed between the baseplate and the substrate; arranged proximal edges of the baseplate; and defines a nominal gap between the magnetic element and the inductor.

One variation of a keyboard system includes: a substrate including an array of inductors; a tactile layer arranged over the substrate defining an array of key locations over the array of inductors; an array of magnetic elements, each arranged within the tactile layer at a key location configured to inductively couple to an adjacent inductor and configured to move relative to the adjacent inductor responsive to application of a force on the tactile layer at the key location; and a controller configured to read electrical values from the inductors. In response to detecting a change in electrical value at a first inductor, the controller also configured to: register a first keystroke of a first key type associated with a first key location defined over the first inductor; and drive an oscillating voltage across the first inductor to oscillate the tactile layer over the substrate during a haptic feedback cycle.

A button structure comprises a base layer, a supporting structure arranged on the base layer, an elastic film layer, the elastic film layer covering the support structure and connected to the support structure, the support structure and the elastic film layer defining a cavity above the base layer, a first upper electrode arranged on the lower surface of the elastic film layer and located in the cavity, a first lower electrode, arranged on the base layer and located in the cavity, and a first variable resistance elastic body between the first upper and first lower electrodes, either arranged on the lower surface of the first upper electrode or arranged on the upper surface of the first lower electrode. When the elastic film layer is elastically deformed in the direction of the base layer, the first variable resistance elastic body connects the first upper electrode with the first lower electrode so as to generate a first signal related to the elastic deformation of the first variable resistance elastic body.

One variation of a touch sensor system includes a set of touch layers: spanning a first area; and including a set of electrodes. The system further includes a set of inductor layers: arranged below the set of touch layers; spanning a second area less than the first area; and including a set of spiral traces defining an inductor. The system also includes a magnetic element arranged below the set of inductor layers and defining a first polarity facing the inductor. The system further includes a controller configured to: read a set of electrical values from the set of electrodes; interpret a force magnitude of a touch input based on the set of electrical values; and in response to the force magnitude exceeding a force magnitude, drive an oscillating voltage across the inductor to induce alternating magnetic coupling between the inductor and the magnetic element.