Abstract: Disclosed are a method for enhancing noise reduction amount of a feedback active noise reduction headphone and active noise reduction headphones. The method includes: arranging a noise reduction microphone of the feedback active noise reduction headphone at a position away from directly in front of a loudspeaker; and adjusting a relative position between the noise reduction microphone and an ear canal opening of a wearer, and enabling an open-loop transfer function at the ear canal opening L2(s0) and an open-loop transfer function at the noise reduction microphone L1(s0) to satisfy a relation of |L2(s0)|>|L1(s0)|, to enhance an actual noise reduction amount at the ear canal opening.

Abstract: A virtual reality helmet (300) and a virtual reality system (500) are disclosed. The virtual reality helmet comprises a helmet body (100) and an optical system (110), and the optical system is provided within the helmet body. The helmet body is provided with a detachable display screen (200). In operation, the display screen is snap-fitted to the helmet body, connects to an external video playing device (400) via a video transmission line, and displays the video data played by the video playing device. The optical system is configured to image a light emitted by the display screen. The video playing device is not attached to the helmet body, which reduces the weight worn on the head, and long-term usage does not easily cause neck fatigue.

Abstract: Embodiments of the present invention provide a head-mounted equipment. The head-mounted equipment includes an equipment body, an accessory and a connecting assembly implementing detachable connection between the accessory and the equipment body, where the connecting assembly is arranged on the accessory; the connecting assembly includes a buckle structure and a spring pressing structure. A clamping groove structure adapted to the buckle structure is provided on the equipment body. When the buckle structure is clamped into the clamping groove structure, the spring pressing structure contacts with the equipment body and applies an elastic force in a first direction to the equipment body. Under the action of the elastic force in the first direction, the buckle structure applies pressure in a second direction to the clamping groove structure; and the first direction is opposite to the second direction.

Abstract: A wearable detection device includes a main body, a first belt body, and a second belt body. The first belt body and the second belt body are connected to two sides of the main body. The main body includes a power source, a control circuit connected to the power source, and a processor connected to the control circuit. The wearable detection device further includes a flexible circuit board and a plurality of to-be-conducted chips. The flexible circuit board is disposed in the first belt body and is connected to the main body. The plurality of to-be-conducted chips are disposed in the first belt body and are connected to the flexible circuit board.

Abstract: A display apparatus, an electronic apparatus (4000), a method for treating failure of a light-emitting unit and an apparatus (7000) for treating failure of a light-emitting unit. The display apparatus comprises: a light-emitting device (10), comprising a plurality of light-emitting units (11) that form a matrix arrangement; and a light-transmitting device (20) provided over the light-emitting device (10), wherein the light-transmitting device (20) comprises a plurality of light-transmitting units (21) that form a matrix arrangement and are provided corresponding to the light-emitting units (11), each of the light-transmitting units (21) is of a rectangle shape, and comprises a light-transmitting opening (212) that is formed by enclosing of side walls (213) that have an independent inflating passageway (215), and the side walls (213) are configured to have a light refraction passageway (214).

Abstract: There is provided in the present disclosure a head-mounted display device, including: a first positive lens, a second positive lens and a micro-display component arranged coaxially and sequentially, where a light incident surface of the first positive lens is close to a light emergent surface of the second positive lens, and a light incident surface of the second positive lens is close to the micro-display component; the light emergent surface of the second positive lens is a convex Fresnel surface, and the light incident surface of the first positive lens is a planar Fresnel surface. The head-mounted display device provided by the present disclosure can effectively enlarge the field angle and reduce the volume.

Abstract: A speaker and earplug earphones are provided. The speaker includes a cylindrical speaker housing. A partition board arranged along a radial direction is disposed in an enclosed cavity. A first speaker and a second speaker are respectively disposed on both sides of the partition board, and each includes a magnetic circuit system and a vibrating system. A magnetic gap is disposed between the magnetic circuit system and the speaker housing, and an air pressure balance holes are formed in the partition board located at the magnetic gap. The vibrating system includes a voice coil and a vibrating diaphragm covering the end part of the speaker housing. Each earplug earphone includes an earphone front housing and an earphone back housing. The speaker is mounted in the enclosed space. Multiple front housing sound output holes is formed in the earphone front housing. An acoustic waterproof membrane is disposed between the multiple front housing sound output holes and the speaker.

Abstract: A belt connection structure of a wearable product is provided. A first transmission rack is provided on a side wall of a first elongate hole. A second transmission rack is provided on a side wall of a second elongate hole facing the first transmission rack. A gear is engaged with the first and second transmission racks respectively. A connecting member coaxial with the gear is provided on a side surface of the gear. A sleeve communicating with a slide way is provided on the outer side wall of an outer cover. The inner side wall of the sleeve is provided with teeth extending in the axial direction. At least two annular grooves are formed on the outer side wall of the sleeve. A belt button is mounted on the sleeve, and comprises a pressing portion and a connecting column. The pressing portion and the connecting column are slidable in the axial direction but are not rotatable relative to each other. Position limiting teeth are provided on the outer side surface of the connecting column.

Abstract: A magnetic attraction type cord winding module, comprising a rotary wheel (9) on which a cord (10) is wound and a stop button (4) working cooperatively with the rotary wheel (9). The cord winding module further comprises at least one pair of magnet blocks, and the at least one pair of magnet blocks comprise a first magnet (3) disposed on the stop button (4) and a second magnet (5) disposed on the rotary wheel (9). The stop button (4) automatically brakes the rotary wheel (9) under the action of an attractive force or a repulsive force of the magnet blocks and prevents the rotary wheel (9) from retracting the cord (10). The magnet block disposed on the stop button (4) does not protrude from the upper surface of the stop button (4), and the magnet block disposed on the rotary wheel (9) is flattened.

Abstract: Provided are an eyepiece and a head-mounted display device, where the eyepiece includes: a positive lens and a negative lens arranged sequentially and coaxially; where a light incident surface of the positive lens is a planar Fresnel surface, and a light emergent surface of the positive lens is a convex surface; a light incident surface of the negative lens is a concave surface, and a light emergent surface of the negative lens is a convex surface; and the light to be observed is incident on the light incident surface of the negative lens and refracted by the negative lens to the light incident surface of the positive lens, and enters human eyes after being refracted by the positive lens. The eyepiece and head-mounted display device provided by the present disclosure realize an ultrathin eyepiece optical system and facilitate a miniaturized and lighter head-mounted display device.

Abstract: A pull-out type cord winding module, comprising a rotary wheel (6) which a cord (7) is wound on and which is connected with a coil spring (5), and a stopper mechanism working cooperatively with the rotary wheel (6) and including a functional rail, a ball (3) and a rolling assisting device. The functional rail comprises a locking rail, a communicating rail (25) and annular rails (21, 22) which are connected, groove-shaped and arranged around an outer circumference of the rotary wheel (6). A guide groove (91) is provided on the rolling assisting device, and two ends of the guide groove (91) are located at the upper and lower sides of the outer circumference of the rotary wheel (6) respectively. The guide groove (91) cooperates with the functional rail to hold the ball (3). When the rotary wheel (6) rotates, the ball (3) rolls in the functional rail to lock or unlock rotation of the rotary wheel (6).

Abstract: The present disclosure discloses a method for reproducing an object in a 3D scene and a virtual reality head-mounted device. The method comprises: simultaneously gathering at least two channels of video stream data in real time at different angles for an object to be displayed by using at least two image gatherers, wherein first field angles of the image gatherers at least partially overlap in space, and the first field angles are a horizontal field angle, a vertical field angle or a diagonal field angle; identifying out a shape of the object varying in real time from the at least two channels of video stream data; according to the shape of the object varying in real time, obtaining a corresponding object motion trajectory; and processing the shape of the object varying in real time and the corresponding object motion trajectory into a 3D image and in real time superposition-displaying the 3D image into the 3D scene.

Abstract: The present disclosure discloses a lens shielding mechanism, a lens shielding method and a head-mounted display using the lens shielding mechanism. The lens shielding mechanism is used for shielding an area exposed from a front housing (21) due to leftward and rightward movements of a lens (22). The lens shielding mechanism comprises: a group of shielding sheets (23) having a certain width. The group of shielding sheets (23) is arranged on left and right sides of the lens (22) and is fixedly connected to the lens (22). When the lens (22) moves leftwardly and rightwardly, the lens drives the group of shielding sheets (23) to move, and an area exposed from the front housing (21) due to the leftward and rightward movements of the lens (22) is shielded by the group of shielding sheets (23). The lens shielding mechanism has a good shielding effect and a simple structure, and occupies a small space.

Abstract: A sliding-type locking buckle comprises a casing and a locking buckle body. The casing comprises an upper casing, a lower casing, and an inner cavity. The locking buckle body comprises an upper body, a lower body, and a compression spring. The upper casing is provided with an upper sliding slot. The inner wall of the upper casing is provided with a plurality of sawteeth along the length direction of the upper sliding slot. The lower body is located in the inner cavity. The top of the upper body protrudes out of the upper sliding slot. A lateral surface of the upper body is provided with a limiting protrusion. The limiting protrusion is provided with a sawtooth portion.

Abstract: The present disclosure discloses a system and a method for inputting a gesture in a 3D scene. The system comprises a gesture acquiring unit configured to simultaneously acquire at least two channels of video stream data in real time at different angles for a user's gesture; a gesture recognizing unit configured to recognize a gesture shape varying in real time from the at least two channels of video stream data; a gesture analyzing unit configured to analyze the gesture shape varying in real time to obtain corresponding gesture motion; and a gesture displaying unit configured to process the gesture motion into a 3D image and display the 3D image in the 3D scene in real time. The technical solutions of the present disclosure can display the user's real gesture in the 3D scene, thereby enhancing the real effect of the system and improving the user's usage experience.

Abstract: A method and apparatus for connecting a Bluetooth device are disclosed. The method includes: setting a connecting cycle according to an obtained count of historical disconnections to a target Bluetooth device; and initiating establishment of a Bluetooth connection to the target Bluetooth device according to the connection cycle when the Bluetooth connection to the target Bluetooth device is disconnected. According to the present disclosure, a time interval that the Bluetooth device initiates the establishment of a Bluetooth connection after the Bluetooth connection is disconnected can be adjusted according to the application scene of the Bluetooth device, which can effectively save power for the device, prolong the runtime of the device, improve the user experience, and effectively guarantee the quality of communication.

Abstract: A connecting mechanism includes a body and a detachable part connected with the body. The body includes a casing and a sliding component. The casing has an insertion hole for insertion of the detachable part. The sliding component is in sliding connection with the casing, and the sliding component has access holes and clamping holes in communication therewith. The detachable part includes insertion pieces. When the sliding component slides from a first position to a second position, the access holes are opposite to the insertion hole, and the insertion pieces extend into the access holes through the insertion hole. When the sliding component slides from the second position to the first position, the insertion pieces enter the clamping holes from the access holes, thereby locking the detachable part. The assembly and disassembly of the detachable part and the body are realized through the operation of the sliding component without tools.

Abstract: A virtual reality helmet (300) and a virtual reality system (500) are disclosed. The virtual reality helmet comprises a helmet body (100) and an optical system (110), and the optical system is provided within the helmet body. The helmet body is provided with a detachable display screen (200). In operation, the display screen is snap-fitted to the helmet body, connects to an external video playing device (400) via a video transmission line, and displays the video data played by the video playing device. The optical system is configured to image a light emitted by the display screen. The video playing device is not attached to the helmet body, which reduces the weight worn on the head, and long-term usage does not easily cause neck fatigue.

Abstract: Some embodiments of the present disclosure provide a prismatic AR display device comprising an LCOS display chip, a polarization beam splitter (PBS), a double cemented lens, a first single lens and a beam splitting prism sequentially arranged along a first axis, and LCOS lighting apparatus arranged on a second axis perpendicular to the first axis and is close to the PBS. A negative lens in the double cemented lens is close to the PBS, and a positive lens in the double cemented lens is close to the first single lens; a first light incident surface of the beam splitting prism is close to the first single lens, and an optical axis of the first light incident surface coincides with that of the first single lens; and an optical axis of a second light incident surface of the beam splitting prism is perpendicular to that of the first light incident surface.

Abstract: There is provided in the present disclosure a head-mounted display device, including: a first positive lens, a second positive lens and a micro-display component arranged coaxially and sequentially, where a light incident surface of the first positive lens is close to a light emergent surface of the second positive lens, and a light incident surface of the second positive lens is close to the micro-display component; the light emergent surface of the second positive lens is a convex Fresnel surface, and the light incident surface of the first positive lens is a planar Fresnel surface. The head-mounted display device provided by the present disclosure can effectively enlarge the field angle and reduce the volume.