Abstract: Embodiments of the invention provide a tracking performance evaluation method and a host. The method includes: establishing a virtual environment; obtaining a tracking result of a virtual tracking device executing a tracking function in the virtual environment; and providing a tracking performance evaluation result for the virtual environment based on the tracking result.

Abstract: The embodiments of the disclosure provide a power management method, an electronic device, and a computer readable storage medium. The method includes: obtaining a first communication quality between the first electronic device and a second electronic device; obtaining a first motion data of a reference device among the first electronic device and the second electronic device; and managing a first transmit power of the reference device among the first electronic device and the second electronic device according to the first motion data of the reference device and the first communication quality.

Abstract: A detection device for detecting an eyeball includes a frame element, a transceiver, and a contact lens element. The transceiver is disposed on the frame element. The transceiver transmits a first RF (Radio Frequency) signal. The contact lens element includes a resonator. The resonator converts the first RF signal into a first ultrasonic signal. The first ultrasonic signal is transmitted to the eyeball. The resonator converts a second ultrasonic signal from the eyeball into a second RF signal. The transceiver receives the second RF signal.

Abstract: A detection device includes a plurality of capacitive sensors, a transmission antenna, a reception antenna, a radar module, a carrier module, and a processor. The capacitive sensors detect first information of a human body portion in a first direction, and detect second information of the human body portion in a second direction. The radar module uses the transmission antenna to transmit a radar signal to the human body portion. The radar module uses the reception antenna to receive a reflection signal from the human body portion. The radar module detects third information of the human body portion in a third direction according to the reflection signal. The capacitive sensors, the transmission antenna, and the reception antenna are disposed on the carrier element. The processor estimates status information of the human body portion according to the first information, the second information, and the third information.

Abstract: The embodiments of the disclosure provide a method for managing tracking devices, a device manager, and a computer readable storage medium. The method includes: receiving a local map corresponding to each of a plurality of tracking devices and accordingly generating a shared map; obtaining a pose ambiguity status corresponding to each of the tracking devices; determining at least one first specific device among the tracking devices based on the pose ambiguity status corresponding to each of the tracking devices; and disabling at least one function of the at least one first specific device.

Abstract: An image display device including a first optical element, multiple microlens arrays and a second optical element is provided. The first optical element receives a display image and generates multiple image beams parallel to each other. The microlens arrays respectively receive the image beams, deflect the image beams to generate multiple first light beams, and focuses the first light beams on a first focusing plane. The second optical element is disposed between the first focusing plane and a target area, receives the first light beams, deflects the first light beams to generate multiple second light beams, focuses the second light beams on a second focusing plane, and projects the second light beams to focus on the target area.

Abstract: The embodiments of the disclosure provide a method for controlling a view angle, a host, and a computer readable storage medium. The method includes: providing a visual content, wherein the visual content has a field of view (FOV) corresponding to a first view angle; in response to determining that a preparation gesture is detected, displaying a visual cue in the visual content, wherein the visual cue indicates a first direction; and in response to determining that the preparation gesture has been changed to a first gesture corresponding to the first direction, adjusting the FOV to correspond to a second view angle based on the first direction.

Abstract: The embodiments of the disclosure provide a method for establishing a communication group, a communication device, and a computer readable storage medium. The method includes: receiving at least one beacon from at least one reference device, wherein each beacon includes a wireless channel used by the corresponding reference device and a number of connected devices of the corresponding reference device, and the wireless channel indicated in each beacon belongs to multiple reference channels; determining a target channel based on the wireless channel used by the corresponding reference device and the number of connected devices of the corresponding reference device; and establishing the communication group by using the target channel.

Abstract: A method of pose tracking, a method of generating a stable key frame for pose tracking, a portable device, and a head-mounted display are provided. The method of pose tracking includes: receiving a stable key frame from the head-mounted display; receiving map data from the head-mounted display; determining whether the stable key frame is available according to information, wherein the information is obtained from the head-mounted display; and in response to the stable key frame being available, updating a map for the pose tracking according to the stable key frame and the map data.

Abstract: An electronic device includes a printed circuit board, an integrated circuit, a connector, a choke module and a compensation module. The integrated circuit is disposed on the printed circuit board. The connector is disposed on the printed circuit board. The choke module is disposed on the printed circuit board and coupled between the integrated circuit and the connector. The compensation module is disposed on the printed circuit board and coupled between the choke module and the connector.

Abstract: The embodiments of the disclosure provide a method for rendering a virtual object, a host, and a computer readable storage medium. The method includes: determining a plurality of regions in an environment; determining lighting information of each of the plurality of regions; obtaining a to-be-rendered virtual object and selecting at least one candidate region corresponding to the to-be-rendered virtual object among the plurality of regions; determining a reference lighting information based on the lighting information of each of the at least one candidate region; and rendering the to-be-rendered virtual object based on the reference lighting information.

Abstract: The embodiments of the disclosure provide a method for activating a system function, a host, and a computer readable storage medium. The method includes: providing a visual content; tracking a first motion state of a physical object by using a tracking device; and in response to determining that the first motion state of the physical object indicates that a distance between the physical object and the host is less than a first distance threshold and the physical object corresponds to a first content region in the visual content, performing a first system function corresponding to the first content region, wherein the first content region corresponds to a first physical region on a body of the host.

Abstract: A head-mounted display device including a display part and a headrest module is provided. The headrest module includes a base, a first driver, a first soft pad, a first sensor and a controller. The base is pivotally connected to the display part. The first driver is connected between the base and the display part, and is used to drive the base to rotate relative to the display part. The first soft pad is disposed on the base and used to contact a forehead of a user. The first sensor is disposed on the first soft pad and is used to sense the pressure exerted by the forehead on the first soft pad. The controller is electrically connected to the first sensor and the first driver, and is used to control the first driver to drive the base or stop driving the base according to the sensing result of the first sensor.

Abstract: A head-mounted device and a headband are disclosed. The head-mounted device includes a host and a headband. The host has two connecting parts located on opposite sides. The headband has two connecting ends located on opposite sides. The connecting ends are detachably and rotatably connected to the connecting part. A first buckle part of each of the connecting ends rotatably buckles a second buckle part of a corresponding one of the connecting parts. When the headband rotates to a detachable position relative to the host, the first buckle part and the second buckle part are separated.

Abstract: A wearable device includes a host, a pair of temple arms, and a head strap module. The pair of temple arms are connected to two opposite sides of the host. The head strap module includes a pair of connectors, a pair of swivel rings, a pair of buckles, and a support strap. The pair of connectors are respectively detachably connected to the pair of first temple arms. The pair of swivel rings are respectively connected to the pair of connectors. The support strap has a bridging section, a limiting section, and a pair of extension sections. The limiting section is located at a first end of the bridging section. One of the pair of extension sections is connected to a second end of the bridging section opposite to the first end and extended through the swivel ring, the buckle, and the limiting section sequentially and fixed to the buckle.

Abstract: The embodiments of the disclosure provide a method for managing data drop rate, a client device, and a computer readable storage medium. The method includes: determining, by the client device, a first data component corresponding to a t-th time point and a second data component, wherein the first data component belongs to a first data type, and the second data component belongs to the first data type or a second data type; sending, by the client device, a first data packet to a host at the t-th time point, wherein the first data packet comprises a first payload having a fixed size, and the first payload comprises the first data component and the second data component.

Abstract: A spectrum measurement device includes a scanning light receiver, an optical component, and a processor. The scanning light receiver, on a plane, receives a plurality of light beams of a display image sequentially according to a scanning operation to generate a plurality of input light beams sequentially. The optical component receives the input light beams sequentially and generates a plurality of pieces of processed information. The processor obtains luminance and chromaticity information of the display image according to the processed information.