An electronic device includes a keyboard. The keyboard includes a base plate and keys disposed on a base plate. The base plate includes a back support plate, a membrane, and a backlight plate. The membrane and the backlight plate are disposed on two sides of the back support plate. The back support plate supports the membrane, the backlight plate, and the keys. In addition, a buffer structure is disposed on a surface of a side that is of the backlight plate and that faces the key. The back support plate is provided with a first through hole. The key is disposed on a side that is of the membrane and that is away from the back support plate. A protrusion is disposed on a side that is of the key and that faces the base plate. The key moves toward the base plate. The protrusion can press the buffer structure.

A system in which a head-mountable wearable device detects a real-time electroencephalographic (EEG) response from a user while the user is performing an activity or exposed to an external stimulus in a real-world (non-clinical) setting. The wearable device performs on-board processing of a detected EEG signal to enable efficient data wireless transfer to a processing unit (e.g. on a smartphone or the like). The processing unit transforms the EEG signal in real time into a meaningful indicator of current mental state, and presents indicator to the user, e.g. in a form able to improve their performance of the activity, promote complementary activities or to enhance or alter their mental state.

A light emitting device and a keyboard structure are provided. The light emitting device includes a circuit board and multiple light emitting units. The circuit board includes a substrate, a first conductive pad, multiple second conductive pads, and multiple third conductive pads. The first conductive pad and the second conductive pads are disposed on a first board surface of the substrate. The first conductive pad has a symmetrical shape and a symmetrical axis. The symmetrical axis passes through the second conductive pads. The third conductive pads are disposed on a second board surface of the substrate. Each of the third conductive pads is electrically coupled to the first conductive pad and the second conductive pads by multiple conductive columns. Each of the light emitting units is connected to the first conductive pad and one of the second conductive pads.

An electronic device includes a keyboard. The keyboard includes a base plate and keys disposed on a base plate. The base plate includes a back support plate, a membrane, and a backlight plate. The membrane and the backlight plate are disposed on two sides of the back support plate. The back support plate supports the membrane, the backlight plate, and the keys. In addition, a buffer structure is disposed on a surface of a side that is of the backlight plate and that faces the key. The back support plate is provided with a first through hole. The key is disposed on a side that is of the membrane and that is away from the back support plate. A protrusion is disposed on a side that is of the key and that faces the base plate. The key moves toward the base plate. The protrusion can press the buffer structure.

This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for synchronized dual eye variable refresh rate update for a VR display. A display processor obtains an indication of a synchronous flush or an asynchronous flush with respect to a first DPU and/or a second DPU. The display processor determines whether a first flush operation and/or a second flush operation is available at a time instance, where the first flush operation and the second flush operation are associated with the first DPU and/or the second DPU. The display processor performs, based on a VSync instance, the first flush operation and/or the second flush operation based on whether the first flush operation and/or the second flush operation are available at the time instance and based on the indication of the synchronous flush or the asynchronous flush.

A light emitting device and a keyboard structure are provided. The light emitting device includes a circuit board and multiple light emitting units. The circuit board includes a substrate, a first conductive pad, multiple second conductive pads, and multiple third conductive pads. The first conductive pad and the second conductive pads are disposed on a first board surface of the substrate. The first conductive pad has a symmetrical shape and a symmetrical axis. The symmetrical axis passes through the second conductive pads. The third conductive pads are disposed on a second board surface of the substrate. Each of the third conductive pads is electrically coupled to the first conductive pad and the second conductive pads by multiple conductive columns. Each of the light emitting units is connected to the first conductive pad and one of the second conductive pads.