Abstract: The embodiments of the disclosure provide a tracking system and a motion data collecting method. The tracking system includes a wearable device. The wearable device detachably docks with a tracker, wherein in a first duration where the wearable device is not docked with the tracker, the wearable device collects a plurality of first motion data associated with a first motion mode. In a second duration where the wearable device is docked with the tracker, the wearable device provides the plurality of first motion data to a host via the tracker, wherein the wearable device is tracked by the host via the tracker during the second duration.

Abstract: A stress feedback device and a virtual image display system are provided. The stress feedback device includes a position sensor and a pressure generator. The position sensor is configured to generate a position information based on a trigger signal and send the position information to a host. The pressure generator is configured to apply a stress to a target area based on the trigger signal and adjust an intensity of the stress.

Abstract: The embodiments of the disclosure provide a method for hand tracking. The method includes: obtaining, through a head-mounted device, a first image of a hand; determining, through the processor, a first pose of a first part of the hand based on the first image; obtaining, through a hand-held device, a second image of the hand; determining, through the processor, a second pose of a second part of the hand based on the second image, wherein the first part and the second part complementarily form an entirety of the hand; and determining, through the processor, a gesture of the hand based on the first pose and the second pose.

Abstract: A virtual image display system includes a virtual image display device and a hand-held control device. The virtual image display device is coupled to the hand-held control device. The hand-held control device is configured to capture image information of the virtual image display device and analyze the image information to obtain relative angle information between the virtual image display device and the hand-held control device. The virtual image display device adjusts a pointing direction of a displayed virtual hand-held control device image according to the relative angle information.

Abstract: A head-mounted display device includes a body, a fan, a first valve, and a first shape memory alloy element. The body is configured to be worn on a face of a user. The body has an air channel, an air outlet, and a first air inlet. The first air inlet is communicated with the air outlet through the air channel. The fan is disposed in the air channel and is configured to drive air inside the air channel to flow. The first valve is disposed in the air channel. The first shape memory alloy element is connected between the first valve and the body, and is configured to move the first valve to adjust airflow inside the air channel.

Abstract: A handheld controller is adapted to control an electronic device. The handheld controller includes a first body, a second body, and a connecting portion. The first body is adapted to be held by a user's hand. The second body is connected to the first body through the connecting portion. The connecting portion is adapted to be clamped between user's fingers. A distance between the first body and at least a portion of the second body is variable.

Abstract: A circuit board and a layout method thereof are provided. The circuit board includes a first metal layer, a second metal layer, and a third metal layer. The first metal layer forms multiple first reference conductive wires. The second metal layer forms at least one signal transmission wire. The third metal layer forms multiple third reference conductive wires. The first metal layer, the second metal layer, and a third metal layer are overlapped with each other, and each of the first reference conductive wires is not completely overlapped with each of the second reference conductive wires.

Abstract: A control system is provided. The control system includes a ring device and a controller. The ring device includes an inertial measurement unit (IMU) sensor. The ring device is adapted to be worn on a finger of a user and the IMU sensor is configured to obtain sensor data. The controller is configured to receive the sensor data from the ring device and generate detection data based on the sensor data. The detection data is configured to indicate whether the ring device is rotated and whether the ring device is tapped. The controller is configured to perform a control operation in a virtual world displayed by the controller based on the detection data.

Abstract: The embodiments of the disclosure provide an active audio adjustment method. The active audio adjustment method includes: receiving, by a host, an ambient sound from a sound pickup device; analyzing, by the host, the ambient sound to obtain an ambient parameter of the ambient sound and determine an adjustment strategy; adjusting, by the host, an original parameter of an output audio to determine an optimized parameter based on the ambient parameter of the ambient sound and the adjustment strategy; generating, by the host, an optimized output audio based on the optimized parameter; and outputting, by the host, the optimized output audio to an audio output device.

Abstract: The embodiments of the disclosure provide method for saving power, a wearable device, and a computer readable storage medium. The method includes: obtaining a motion detection result provided by a motion detector; obtaining a touch detection result provided by a touch detector; determining whether the wearable device is in a static state at least based on the motion detection result and the touch detection result; and switching the wearable device to a power saving mode in response to determining that the wearable device is in the static state.

Abstract: A tracking apparatus, method, and non-transitory computer readable storage medium thereof are provided. The tracking apparatus generates a map information of simultaneous localization and mapping corresponding to a regional space based on a real-time image. The tracking apparatus calculates a first spatial position and a first orientation of a first display related to the image capturing device in the regional space based on the map information. The tracking apparatus calculates a human pose of a first operating user in the regional space. The tracking apparatus transforms the real-time image to generate a first transformed image corresponding to the first operating user based on the first spatial position, the first orientation, and the human pose, wherein the first transformed image is displayed on the first display.

Abstract: The embodiments of the disclosure provide an analysing method for gratings, an electronic device, and a computer readable storage medium. The method includes: determining candidate gratings; determining grating combinations based on the candidate gratings, wherein each of the grating combinations includes at least one of the candidate gratings, and the at least one of the candidate gratings in each grating combination is different from each other; determining a first diffraction response map of a first multiplexing grating corresponding to a first grating combination of the grating combinations; determining a first luminous intensity map of the first multiplexing grating corresponding to the first grating combination via modifying the first diffraction response map based on at least one parameter of a light engine; and determining a first reconstruction image corresponding to the light engine via processing a template image based on the first luminous intensity map.

Abstract: A vibrating device and an operation method thereof. The vibrating device includes multiple electromyography sensors, a force sensor, multiple vibrators and a controller. The electromyography sensors are respectively disposed at different positions of a user to obtain multiple pieces of electromyography information respectively. The vibrators are disposed adjacent to or overlapping with the electromyography sensors. During a setting period, the controller makes the vibrators vibrate according to a preset vibration waveform. During the setting period, the controller records multiple pieces of force information generated by the force sensor corresponding to multiple different applied forces of the user and the pieces of electromyography information generated by the electromyography sensors. The controller obtains multiple characteristic frequency parameters according to the corresponding pieces of electromyography information.

Abstract: A contact lens and an eye tracking device are provided. The contact lens includes a first type polarization structure and a second type polarization structure. The first type polarization structure is disposed in a first area of the contact lens, and the first area surrounds a center area of the contact lens. The second type polarization structure is disposed in a second area of the contact lens, and the second area surrounds the first area. The first type polarization structure and the second type polarization structure have different polarization directions.

Abstract: A head-mounted display, unlocking method, and non-transitory computer readable storage medium thereof are provided. The head-mounted display generates a wearing position distribution based on a plurality of real-time images including a user wearing at least one wearable device on at least one finger position, wherein the wearing position distribution indicates a wearing position of the at least one wearable device wear worn by the user. The head-mounted display generates an unlocking signal to unlock the head-mounted display based on the wearing position distribution.

Abstract: An antenna structure includes a first signal source, a second signal source, a first radiator, a second radiator, a third radiator, a first circuit, and a second circuit. The first signal source is used to generate a first wireless signal, and the second signal source is used to generate a second wireless signal. The first radiator is coupled to the first signal source to receive the first wireless signal, and the second radiator is coupled to the second signal source to receive the second wireless signal. The first circuit has a first end coupled to the third radiator and a second end coupled to the first radiator or the first signal source. The second circuit has a first end coupled to the third radiator and a second end coupled to the second radiator or the second signal source.

Abstract: The embodiments of the disclosure provide a method for generating a pass-through view with better scale and to a host. The method includes: obtaining, by the host, a first depth map associated with a field of view (FOV) of the host; determining, by the host, tracker information associated with a tracker; generating, by the host, a target depth map by updating the first depth map based on the tracker information; and rendering, by the host, the pass-through view based on an image associated with the FOV of the host, a camera parameter, and the target depth map.