Honor

This application provides a foldable electronic device and an antenna system for same. The antenna system includes a main antenna element and a parasitic antenna element. The main antenna element is an antenna structure having a radiation characteristic of a current loop antenna, and includes a feed point and a first radiating branch disposed on a first body of the electronic device. The parasitic antenna element includes a second radiating branch disposed on a second body of the electronic device. In a folded state, the first radiating branch and the second radiating branch are at least partially overlapped. The first radiating branch is configured to perform magnetic field coupling with the second radiating branch, to form current loop radiation on both the first radiating branch and the second radiating branch, and a current direction in a current loop formed on the first radiating branch is the same as a current direction in a current loop formed on the second radiating branch. In this manner, longitudinal currents in a same direction may be simultaneously excited on a foldable grounding plate of the electronic device, to achieve a purpose of reducing or eliminating energy consumed in the folded state and increasing antenna efficiency, effectively resolving a problem of poor antenna efficiency in a low band of the electronic device in the folded state.

Embodiments of this application provide a method for using a stylus for presentation control and a stylus, and relate to the field of terminal technologies. The stylus can be used in a presentation scenario, to control an electronic device such as a tablet or a notebook to complete a presentation operation. The stylus establishes a wireless communication link with a first device. The stylus receives a first signal sent by the first device, and the stylus sends a second signal in response to the first signal, where the stylus does not respond to an air mouse operation of a user, and the first signal and the second signal are not sent through the wireless communication link. After a first event, the stylus sends a first command to the first device through the wireless communication link in response to the air mouse operation, to control the first device to implement a function of invoking a cursor, moving the cursor, tapping, and page flipping. After the first event, the stylus does not respond to the first signal.

Embodiments of this application disclose a terminal monopole antenna, relating to the technical field of antennas, and enabling the antenna to provide better radiation performance under a same environmental condition. A specific solution is: The antenna includes a radiation branch, the radiation branch includes at least one radiator, and a first end of the radiator is electrically connected to a reference ground through a first inductor. When the terminal monopole antenna is directly fed by a feeding point, a second end of the radiator is electrically connected to the feeding point. When the terminal monopole antenna is coupled and fed, the second end is electrically connected to the reference ground through a second inductor. The terminal monopole antenna further includes a feeding branch, the feeding branch is not connected to the radiation branch, the feeding branch is arranged between the radiation branch and the reference ground, a feeding point is arranged on the feeding branch, and the feeding branch is configured to perform coupled feeding to the radiation branch. A length of the radiation branch is less than a quarter of an operating wavelength of the terminal monopole antenna.

This application provides a rotating mechanism and a foldable electronic device. The rotating mechanism includes a fixed base, a first synchronization swing arm, a second synchronization swing arm, and a synchronization gear. A first gear, an intermediate gear, and a second gear of the synchronization gear are all helical gears, the first gear, the intermediate gear, and the second gear are disposed side by side and in parallel, and the intermediate gear is located between the first gear and the second gear and engages with the first gear and the second gear. The first synchronization swing arm is fastened to the first gear, and the second synchronization swing arm is fastened to the second gear. The synchronization gear is mounted in the fixed base and is rotatably connected to the fixed base, the first synchronization swing arm and the second synchronization swing arm are respectively located on two opposite sides of the fixed base in a width direction, a rotation direction of the first synchronization swing arm is opposite to a rotation direction of the second synchronization swing arm, and a rotation direction of the first gear is opposite to a rotation direction of the second gear. The rotating mechanism provided in this application can resolve a technical problem of poor transmission stability of a rotating mechanism in the conventional technology.

Embodiments of this application disclose chemically toughened microcrystalline glass and a preparation method and application thereof. The chemically toughened microcrystalline glass has a Na/Li exchange layer, and has a compressive stress layer. A depth of the compressive stress layer and a total thickness t of the chemically toughened microcrystalline glass meet the following: the depth of the compressive stress layer is 0.15 t to 0.22 t. In addition, a compressive stress intensity CS50 at a toughening depth of 50 µm in a surface layer of the chemically toughened microcrystalline glass and the total thickness t of the chemically toughened microcrystalline glass meet the following: CS50 is 130 + (20 t - 13) × 15 Mpa to 230 + (20 t - 13) × 15 MPa. In addition, CS50 and the depth of the compressive stress layer meet the following: CS50/(Doc - 50) is 1.4 to 6. The chemically toughened microcrystalline glass has strong piercing resistance to a rough ground, and a chemical toughening condition for the preparation method of the chemically toughened microcrystalline glass is easy to control, so that prepared chemically toughened microcrystalline glass has stable performance, high efficiency, and reduced preparation costs.

This application provides an electronic device. The electronic device includes a rear cover, a camera bracket, and an NFC antenna. The camera bracket is disposed on the rear cover and includes a first surface and a second surface that are oppositely disposed. The first surface of the camera bracket faces an outer side of the electronic device. A first light hole is disposed in the camera bracket, and the first light hole is configured to be opposite to a first camera flash or a first camera. The NFC antenna is laid on the first surface of the camera bracket. A first orthographic projection of the NFC antenna on the first surface of the camera bracket falls into the first surface of the camera bracket and does not overlap the first light hole, so that the NFC antenna avoids the first light hole. In this application, an NFC antenna still has good radiation performance in a scenario in which a quantity of cameras is increasingly large and a camera bracket is increasingly large.

This application provides a rotating shaft apparatus, a support system, and a foldable-screen device, and relates to the technical field of foldable electronic products, to resolve a problem of how to reduce noise generated by a rotating shaft apparatus in a foldable-screen device in a moving process. The rotating shaft apparatus includes a first primary support member, a second primary support member, a first secondary support member, and a lubrication structure. The first primary support member has a first support surface, the second primary support member has a second support surface, and the second primary support member can rotate relative to the first primary support member between an unfolded location and a folded location. The first secondary support member includes a first connection part and a first cantilever part, the first connection part is located on a side facing the second support surface and is connected to the second primary support member, the first cantilever part includes a first cantilever segment, and the first cantilever segment is located on a side facing the first support surface. The lubrication structure is disposed at least between at least a part of the first cantilever segment and the first primary support member. The rotating shaft apparatus provided in this application is configured to fold/unfold a foldable screen.

The present invention discloses a method and an apparatus for predictively coding and decoding depth information of a point cloud. A method for coding includes: obtaining original point cloud data; creating an adaptive prediction list of the depth information of the point cloud; and predictively coding the depth information of the point cloud based on the adaptive prediction list, to obtain codestream information. According to the present invention, an adaptively updated prediction list of the depth information is created, and an optimal prediction mode is selected from the list to predict the depth information of the point cloud. Therefore, discontinuity of the depth information of the point cloud caused by discontinuity of an actual scenario is resolved. Accordingly, a predicted residual and a frequency of occurrence of an outlier and a hop value, of the depth information, are significantly reduced, and prediction accuracy and coding efficiency are improved.

This application relates to the field of electronic device technologies, and in particular, to a circuit board assembly and an electronic device. The circuit board assembly includes a circuit board, an electrical connection board, and a flexible circuit board. The electrical connection board is mounted on the circuit board in a thickness direction of the circuit board assembly, and is electrically connected to the circuit board. At least a part of the flexible circuit board has a flexible structure. The flexible circuit board includes a first connection segment and a second connection segment. The first connection segment is configured to connect to a component of an electronic device. The second connection segment is connected to the electrical connection board. The electrical connection board is configured to adjust a distance between the second connection segment and the circuit board in the thickness direction of the circuit board assembly, to adjust a bent form of the flexible circuit board without changing a distance between the component of the electronic device and the circuit board in a width direction of the electronic device.

Zusammenfassung wird geladen …