Cable and head-mounted display

Abstract

The application provides a cable and a head-mounted display, the cable comprising: a cable main body, a main path of the cable main body being separated into a first branch and a second branch through a branch divider; a first connector arranged at the end of the main path and configured to be connected with an external electronic device; a second connector arranged at the end of the first branch and configured to establish a data signal link with a host device; a third connector arranged at the end of the second branch and configured to be connected with an external power supply; the second connector is electrically isolated from the power supply terminal of the first connector; the third connector is electrically connected with the power supply terminal of the first connector, and the configuration terminal is connected to the ground through a pull-down resistor; the first to third connectors share the ground; the data terminal of the first connector is electrically connected with the data terminal of the second connector to perform data transmission. Through the isolation of the power supply terminal, the problem of power supply conflict and reverse current is solved, the high-speed data transmission and stable power supply are ensured, and the high-power peripheral device scene is adapted.

Description

Technical Field

[0001] This application relates to the field of signal transmission cable technology, and more particularly to a cable and a head-mounted display. Background Technology

[0002] With the continuous growth in demand for power supply and data transmission bandwidth from electronic products such as head-mounted displays, portable monitors, and high-performance peripherals, the USB Type-C interface has gradually become the mainstream connection solution.

[0003] USB Type-C not only supports DisplayPort Alt Mode video transmission and USB 3.2 Gen2 high-speed data transmission, but also achieves a power supply capability of up to 100W through the PD protocol. However, in practical applications, the Type-C interfaces of many host devices (such as thin and light laptops, tablets, and gaming devices) have limited output power, making it difficult to meet the continuous and stable operation requirements of high-power peripherals (such as high-resolution headsets and multi-camera systems). Users usually need to connect the host device and an external power adapter simultaneously using a Y-type Type-C cable to achieve power aggregation. However, the existing Y-type cable design has significant drawbacks: direct parallel connection of the host device and the external power supply's VBUS may lead to power conflicts, reverse current risks, or voltage instability. Furthermore, it requires the addition of complex power management circuitry (such as anti-backflow circuitry and power switching modules) within the terminal device, significantly increasing cost and heat generation.

[0004] Therefore, there is an urgent need for a new Type-C Y-type cable solution that can both provide safe power supply and support reliable data transmission, in order to meet the complex needs of high-power peripherals and main equipment working together. Utility Model Content

[0005] The cable and head-mounted display provided in this application are intended to solve the problems of power conflict and reverse current risk caused by the parallel connection of the existing Y-type Type-C cable main device with the external power supply.

[0006] In a first aspect, embodiments of this application provide a cable, comprising: a cable body, wherein a splitter is integrated at a branch point to separate the main path of the cable body into a first branch and a second branch that are independent of each other; a first connector disposed at the end of the main path, the first connector being configured to connect to an external electronic device; the end being an end away from the branch point; a second connector disposed at the end of the first branch, the second connector being configured to establish a data signal link with a host device; and a third connector disposed at the end of the second branch, the third connector being configured to connect to an external power source to provide power to the external electronic device; wherein the power terminal of the second connector is electrically isolated from the power terminal of the first connector; the power terminal of the third connector is electrically connected to the power terminal of the first connector, and the configuration terminal of the third connector is connected to ground via a pull-down resistor; the ground terminals of the first connector, the second connector, and the third connector are interconnected; and the data terminal of the first connector is electrically connected to the data terminal of the second connector to enable the external electronic device and the host device to transmit data through a data signal link.

[0007] In one possible implementation, at least one of the first connector, the second connector, and the third connector is a Universal Serial Bus (USB) interface.

[0008] In one possible implementation, at least one of the first connector, the second connector, and the third connector is a USB Type-C connector.

[0009] In one possible implementation, the power terminals of the third connector are electrically connected to the power terminals of the first connector via a shielded conductive path.

[0010] In one possible implementation, the first connector is provided with a structural limiting part, which forms a foolproof fit with the adapted mating port.

[0011] In one possible implementation, the structural limiting part is at least one of a single-sided flattened structure, a stepped limiting edge, an asymmetric insertion groove, a guide beam, and a press-in limiting mechanism.

[0012] In one possible implementation, the data terminals of the first connector and the data terminals of the second connector are connected via at least one pair of high-speed differential lines; the at least one pair of high-speed differential lines are controlled by a differential impedance of 90Ω±10%.

[0013] In one possible implementation, the cable body includes a shielding structure extending along its length, the shielding structure including at least one conductive shielding layer and at least one braided shielding layer.

[0014] In one possible implementation, the shielding structure has an integrated shielding transition section at the bifurcation point; the integrated shielding transition section is fixedly connected to the splitter and seamlessly connected, and is used to transition the shielding structure of the main road to the shielding structures of the first branch road and the second branch road respectively.

[0015] In one possible implementation, the cable does not include a control chip or a switching component for switching the on / off state of the circuit.

[0016] Secondly, embodiments of this application provide a head-mounted display, including a display body and a cable provided in the first aspect of this application; the display body has a mating port that mates with a first connector of the cable.

[0017] In one possible implementation, the docking port does not include a multiplexer chip for high-speed signal switching.

[0018] The cable and head-mounted display provided in this application address the need for high-power peripherals, such as head-mounted displays, to simultaneously transmit data to the main device and supply power to an external power source. A Y-shaped cable is designed, with a splitter dividing the main cable into two branches. The connector at the end of the main branch connects to the peripheral, while the connectors at the ends of the two branches connect to the main device and the external power source, respectively. The isolation design between the power terminals of the second connector and the first connector reduces power conflicts and backflow risks between the main device and the external power source, eliminating the need for additional power management circuitry on the peripheral, thus reducing costs and heat generation. Data terminal connectivity ensures data transmission between devices, and a common ground design improves signal stability. This design precisely adapts to scenarios where head-mounted displays require simultaneous data interaction and high-power supply, enhancing safety and practicality. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1 A schematic diagram of the external structure of the cable provided in an embodiment of this application;

[0021] Figure 2 A circuit block diagram of the cable provided in the embodiments of this application;

[0022] Figure 3 A schematic diagram of a first connector for preventing reverse insertion provided in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the structure of a head-mounted display provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the electrical connection between the first connector and the mating port in the absence of a MUX chip, as provided in an embodiment of this application.

[0025] Figure label:

[0026] 10-Cable;

[0027] 100 - Cable body; 101 - First branch; 102 - Second branch; 103 - Main cable; 104 - Splitter; C - Branching point;

[0028] 110 - First connector; VBUS1 - Power terminal of first connector 110; D1 - Data terminal of first connector 110; GND1 - Ground terminal of first connector 110;

[0029] 120 - Second connector; VBUS2 - Power terminal of second connector 120; D2 - Data terminal of second connector 120; GND2 - Ground terminal of second connector 120;

[0030] 130 - Third connector; VBUS3 - Power terminal of third connector 130; CC3 - Configuration terminal of third connector 130; GND3 - Ground terminal of third connector 130; Rd - Pull-down resistor;

[0031] 20 - Head-mounted display; 21 - Display body; 22 - Dating port;

[0032] 200 - External electronic devices;

[0033] 300 - Master equipment; LD - Data signal link;

[0034] 400 - External power supply.

[0035] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a primary connection, an indirect connection via an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0040] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0041] For some electronic devices that require both data transmission and charging, such as head-mounted displays and portable displays, relying solely on the main device for power supply can easily lead to insufficient power supply due to the power limitations of the main device's USB (Universal Serial Bus) Type-C interface.

[0042] To solve this problem, the Y-type cable was developed. The Y-type cable, through its branching structure, allows electronic devices to connect to both the main device and an external power source. The external power source provides high-power supply to the electronic devices, compensating for the power limitations of the main device interface and ensuring the continuous and stable operation of the equipment.

[0043] However, existing Y-type connectors typically connect the VBUS (Voltage Bus) terminals of two Type-C interfaces in parallel, which, while enabling power supply superposition, can lead to confusion in power supply role identification, mutual impact between power supplies, and expose the main device to reverse current risks. Furthermore, electronic devices need to add additional power management circuits to avoid these problems, increasing equipment costs and heat generation.

[0044] Based on this, this application provides a cable that uses a splitter to separate the main cable into two independent branches: a first branch and a second branch. The first connector at the end of the main branch connects to an electronic device, the second connector of the first branch connects to the main device, and the third connector of the second branch connects to an external power supply. Through electrical isolation or controlled connection design between the power terminals of the second and first connectors, parallel power supply conflicts are avoided at the hardware level. The configuration terminal of the third connector is grounded via a pull-down resistor, clearly defining its power receiving role. Simultaneously, all three connectors share a common ground, and the data terminals of the first and second connectors are correspondingly connected. This ensures high-speed data transmission between the main device and the electronic device without requiring additional power management circuitry, reducing costs and heat generation, and balancing power supply stability and operational safety.

[0045] Figure 1 This is a schematic diagram of the external structure of the cable provided in an embodiment of this application. Figure 2 For a circuit block diagram of the cable provided in the embodiments of this application, see [link to relevant documentation]. Figure 1 and Figure 2 As can be seen, the cable 10 provided in this embodiment includes: cable body 100, first connector 110, second connector 120 and third connector 130.

[0046] The cable body 100 integrates a splitter 104 at the branch point C, which separates the main cable 103 into two independent branches: a first branch 101 and a second branch 102. A first connector 110 is located at the end of the main branch 103 and is configured to connect to an external electronic device 200. A second connector 120 is located at the end of the first branch 101 and is configured to establish a data link (LD) with the main device 300. A third connector 130 is located at the end of the second branch 102 and is configured to connect to an external power source 400, such as a power adapter, to provide power to the external electronic device 200.

[0047] In this embodiment, the power terminal VBUS2 of the second connector 120 is electrically isolated from, or controlled to be connected to, the power terminal VBUS1 of the first connector 110. Figure 1Taking electrical isolation as an example, the power terminal VBUS3 of the third connector 130 is electrically connected to the power terminal VBUS1 of the first connector 110, and the configuration terminal CC3 (Configuration Channel) of the third connector 130 is connected to ground via a pull-down resistor Rd; the ground terminals GND1 to GND3 of the first connector 110, the second connector 120, and the third connector 130 are interconnected; the data terminal D1 of the first connector 110 is electrically connected to the data terminal D2 of the second connector 120, so that the external electronic device 200 and the main device 300 can transmit data through the data signal link LD.

[0048] Controlled connectivity specifically refers to passive controlled connectivity, which differs from active control methods such as chips and switching components. Passive controlled connectivity relies on physical structures, inherent material properties, or basic electrical laws to achieve on / off regulation, and can achieve automatic regulation of the on / off state without active control commands.

[0049] The power terminal VBUS2 of the second connector 120 can be controlled to connect with the power terminal VBUS1 of the first connector 110 through protective components such as fuses or diodes, achieving non-protocol, non-chip-based on / off protection without relying on a control chip or CC (Configuration Channel) protocol for active on / off control. In some embodiments, the power terminal VBUS2 of the second connector 120 can be in a floating state, thereby achieving permanent physical isolation of the power terminal VBUS2 of the second connector 120, ensuring that the power terminal VBUS2 of the second connector 120 remains disconnected from the power terminals of the other two connectors. This allows the external power supply 400 to supply power only to the connected external electronic device 200, while the main device 300 cannot supply power to the external power supply 400 or the external electronic device 200.

[0050] In one possible implementation, the cable does not include a power delivery (PD) controller or a switching component for switching the on / off state of the circuit.

[0051] In one possible implementation, the cable does not include a control chip or a switching assembly for switching the circuit's on / off state. The control chip may be a PD controller.

[0052] Through the aforementioned design, there is no change in the power supply role among the external electronic device 200, the main device 300, and the external power supply 400 connected by cable 10. That is, the power supply circuit provided by cable 10 is structurally fixed and does not change with PD protocol, CC protocol, or chip logic, unlike existing cables that control the switching of power supply roles.

[0053] The main cable 100 includes a first branch 101, a second branch 102 and a main cable 103, and is Y-shaped in general.

[0054] The length of the main road 103 can be greater than the length of the first branch road 101 and the second branch road 102. For example, the length of the main road 103 can range from 1 meter to 2 meters, and the lengths of the first branch road 101 and the second branch road 102 can be equal or unequal. The lengths of the first branch road 101 and the second branch road 102 can range from 0.3 meters to 1 meter.

[0055] For example, the length of the cable body 100 can be 1.2 meters, of which the length of the main cable 103 is 0.7 meters, and the lengths of the first branch cable 101 and the second branch cable 102 are both 0.5 meters.

[0056] To accommodate high-power external electronic devices, the cable body 100 can have a wire diameter of 3.5 mm.

[0057] The power terminal VBUS3 of the third connector 130 and the power terminal VBUS1 of the first connector 110 can be electrically connected via twisted wires or shielded wires.

[0058] Stranded conductors are made of multiple thin wires twisted together, which can reduce electromagnetic interference and improve mechanical strength.

[0059] Shielded wires have a metal shielding layer wrapped around the conductor to suppress external electromagnetic interference.

[0060] Main line 103 can use an 8-core shielded cable, including a power supply line (2 cores), a common ground line (2 cores), high-speed data differential pairs (2 sets), a signal backbone line (1 core), and a spare control line (1 core). The power supply line is used to connect power terminals such as VBUS1 and VBU3, and the high-speed data differential pairs are used to connect data terminals such as D1 and D2.

[0061] The first branch 101 may not contain a power supply line, or the power supply line may be disconnected, thereby electrically isolating the power terminal VBUS2 of the second connector 120 from the power terminal VBUS1 of the first connector 110.

[0062] The first branch 101 can use a 6-core shielded cable, including a data differential pair (2 cores), a ground wire (2 cores), and a configuration wire (2 cores).

[0063] The second branch 102 can use a 4-core shielded cable, including a power supply line (2 cores), a ground line (1 core), and a configuration line (1 core).

[0064] Splitter 104 can adopt an injection-molded integrated structure, integrated inside the branch point C, and has built-in signal conversion terminals to achieve precise signal connection between the main circuit 103 and the two branch circuits. Splitter 104 can also have anti-pull and anti-electromagnetic interference designs.

[0065] After the 8-core wire of the main line 103 enters the splitter 104, the splitter 104 distributes the wires according to their functions. The high-speed differential line pair of the first branch 101 is directly connected to the same-name group of the main line 103 to ensure high-speed data transmission; the ground wire of the first branch 101 and the ground wire of the main line 103 form a grounding loop to stabilize the signal reference potential; the configuration line of the first branch 101 is taken from the spare control line of the main line 103, reserving a primary / backup data role negotiation interface. The power supply line of the second branch 102 is connected to the power supply line of the main line 103 to achieve electrical connection for power transmission; the ground wire of the second branch 102 can be taken from the ground wire of the main line 103 to form a grounding channel for the power supply loop; the configuration line of the second branch 102 is taken from the signal trunk line of the main line 103 and grounded through a pull-down resistor, so as to identify itself as a power receiver (Sink) to the external power source 400 through a clear resistance characteristic, thereby ensuring the activation of the power supply function.

[0066] For example, the pull-down resistor Rd is 5.1kΩ.

[0067] High-speed differential pairs include, but are not limited to, USB 3.x differential pairs and DisplayPort Main Link differential pairs.

[0068] In addition to high-speed differential lines, the cable body 100 may also include low-speed auxiliary signal lines such as sideband use (SBU) signal lines and USB 2.0 D+ / D- signal lines.

[0069] In one possible implementation, at least one of the first connector 110, the second connector 120, and the third connector 130 is a universal serial bus interface.

[0070] In one possible implementation, at least one of the first connector 110, the second connector 120, and the third connector 130 is a USB Type-C connector.

[0071] For example, the first connector, the second connector, and the third connector are all USB Type-C connectors.

[0072] The first connector 110 serves as the interface between the cable 10 and the external electronic device 200, and simultaneously receives electrical energy from the external power supply 400 and data signals from the main device 300, thereby achieving unified transmission of data signals and electrical energy.

[0073] The first connector 110 can be a USB Type-C male or female connector.

[0074] For example, the first connector 110 can be a USB Type-C female connector, supporting the USB 3.2 Gen2 protocol and the USBPD 3.0 power supply protocol. The power terminal VBUS1 of the first connector 110 corresponds to pins A4 and A9 of the Type-C female connector, and is used to receive external power from the power terminal VBUS3 of the third connector 130 to power external electronic devices such as head-mounted displays. The data terminal D1 of the first connector 110 corresponds to pins A2 (SSTX1+), A3 (SSTX1-), B10 (SSRX1+), and B11 (SSRX1-) of the Type-C female connector, forming a high-speed data differential pair, which interfaces with the data terminal D2 of the second connector 120. The ground terminal GND1 of the first connector 110 corresponds to pins A1, A12, B1, and B12 of the Type-C female connector, and is connected to the ground terminals GND2 and GND3 of the other two connectors, forming a common ground loop.

[0075] The second connector 120 serves as the main device connection end, establishing a data signal link LD with the main device 300. It can be powered without participating in power supply, or it can be powered under control when the external power supply 400 is not connected, thereby avoiding conflicts between the power supply of the main device 300 and the external power supply 400.

[0076] For example, the second connector 120 can be a USB Type-C male connector, supporting the USB 3.2 Gen2 protocol. The power terminal VBUS2 of the second connector 120 corresponds to pins A4 and A9 of the Type-C male connector. It can be encapsulated in insulating resin to achieve electrical isolation, or it can be controlled to connect, such as in series with a protective switch. The data terminal D2 of the second connector 120 corresponds to pins A2 (SSTX1+), A3 (SSTX1-), B10 (SSRX1+), and B11 (SSRX1-) of the Type-C male connector, and is connected to the data terminal D1 of the first connector 110 to form the data signal link LD. The ground terminal GND2 of the second connector 120 corresponds to pins A1, A12, B1, and B12 of the Type-C male connector, and is connected to the ground terminals GND1 and GND3 of the other two connectors to ensure that the data signal reference potential is consistent.

[0077] The third connector 130 serves as an external power supply connection terminal, used to connect to an external power supply 400 to provide high-power electrical energy to peripherals (abbreviated as external electronic devices 200), and simultaneously completes power supply role negotiation through the configuration terminal CC3.

[0078] For example, the third connector 130 can be a USB Type-C male connector, supporting the USB PD 3.0 protocol. The power terminal VBUS3 of the third connector 130 corresponds to pins A4 and A9 of the Type-C male connector and is directly connected to the power terminal VBUS1 of the first connector 110 using silver-plated copper wire. The configuration terminal CC3 of the third connector corresponds to pins A5 or B5 of the Type-C male connector and is connected to the ground terminal GND3 of the third connector 130 via a pull-down resistor Rd. The ground terminal GND3 of the third connector 130 corresponds to pins A1, A12, B1, and B12 of the Type-C male connector and is connected to the ground terminals GND1 and GND2 of the other two connectors, forming a unified ground loop to reduce signal interference.

[0079] For example, the external electronic device 200 can be a head-mounted display, a portable display, a mobile medical testing device, etc. The main device can be a laptop, a smartphone, a tablet, etc.

[0080] The cable provided in this embodiment is designed for high-power peripherals such as head-mounted displays that require simultaneous data transmission from the main device and power supply from an external power source. A Y-shaped cable is used, with a splitter dividing the main cable into two branches. The connector at the end of the main branch connects to the peripheral, while the connectors at the ends of the two branches connect to the main device and the external power source, respectively. Through the isolation or controlled connection design of the power terminals of the second connector and the first connector, power conflicts and backflow risks between the main device and the external power source are reduced. No additional power management circuitry is needed for the peripheral, reducing costs and heat generation. Data terminal connectivity ensures data transmission between devices, and a common ground design improves signal stability. This design precisely adapts to the scenario where head-mounted displays require simultaneous data interaction and high-power supply, enhancing safety and practicality.

[0081] In one possible implementation, the power terminal VBUS3 of the third connector 130 is electrically connected to the power terminal VBUS1 of the first connector 110 via a shielded conductive path.

[0082] A shielded conductive path refers to a conductive connection method in which a shielding layer is added to the outside of the conductive line to isolate external electromagnetic interference and prevent its own signal from radiating outward. For example, the outside is wrapped with metal foil, a braided mesh shielding layer, etc., and then covered with an insulating outer sheath.

[0083] For example, the shielded conductive path can adopt a twisted structure, such as shielded twisted pair, where the power line and the shielding layer are encapsulated together in the same sheath.

[0084] Connecting the power terminals through a shielded conductive path can effectively block external electromagnetic signals from interfering with the power lines, improve the stability of the power supply voltage, and prevent its own signals from radiating outwards.

[0085] In one possible implementation, the data terminal D1 of the first connector 110 and the data terminal D2 of the second connector 120 are connected through at least one pair of high-speed differential lines; the at least one pair of high-speed differential lines are controlled by a differential impedance of 90Ω±10%.

[0086] A pair of high-speed (SuperSpeed) differential lines, also known as high-speed differential pairs, is a transmission line pair consisting of two parallel and coupled conductors with the same characteristics, such as TX+ / TX- or RX+ / RX-. Its transmission principle is to transmit differential signals with equal amplitude and opposite polarity through the two conductors, rather than the absolute voltage between a single conductor and ground, thus carrying effective information.

[0087] Differential impedance refers to the equivalent impedance between two conductors in a high-speed differential pair at a specific operating frequency.

[0088] By controlling the wire diameter, wire spacing, insulation material and thickness, and the distance between the shielding layer and the conductor, the equivalent impedance of the two differential wires can be ensured to fall within the range of 90Ω±10%.

[0089] By employing high-speed differential pairs, the differential transmission characteristics and anti-interference advantages of high-speed signals can be realized, providing a physical layer foundation for high-bandwidth data interaction; through differential impedance control of 90Ω±10%, signal jitter is reduced, ensuring the stability of high-speed transmission.

[0090] In one possible implementation, the cable body 100 includes a shielding structure extending along its length, the shielding structure including at least one conductive shielding layer and at least one braided shielding layer.

[0091] The conductive shielding layer can be a metal foil, such as aluminum foil or copper foil, or a metallized film, such as an aluminum-plated polyester film or a copper-plated polyester film. The conductive shielding layer is tubular and wraps around the outside of the inner conductor of the cable, providing full coverage and no gaps. It is mainly used to shield high-frequency electromagnetic interference, such as radiated interference above 1 GHz.

[0092] The braided shielding layer is a mesh structure formed by weaving multiple strands of fine metal wires, such as tinned copper wire or bare copper wire, and is wrapped around the outside of the conductive shielding layer. It has good flexibility and mechanical strength and is mainly used to shield low-frequency to mid-frequency electromagnetic interference, such as conducted interference of 1MHz-1GHz. At the same time, it can enhance the cable's tensile and bending resistance.

[0093] The shielding structure provided in this embodiment utilizes the continuous metal surface of the conductive shielding layer to form surface shielding against high-frequency radiated interference, resulting in a significant blocking effect. It also utilizes the metal mesh of the braided shielding layer to form mesh shielding against low-frequency conducted interference, while simultaneously compensating for the defects of metal foil, such as fragility and poor flexibility. These two shielding structures complement and synergize to achieve all-round protection against electromagnetic interference across the entire frequency band. Furthermore, the braided shielding layer can serve as mechanical protection and a grounding path for the conductive shielding layer, effectively protecting the inner conductive shielding layer and core conductor, and preventing problems such as shielding layer damage and conductor breakage caused by frequent plugging, unplugging, and bending of cables.

[0094] In one possible implementation, the shielding structure has an integrated shielding transition section at the bifurcation point C; the integrated shielding transition section is fixedly connected to the splitter 104 and seamlessly connected, and is used to transition the shielding structure of the main road 103 to the shielding structures of the first branch road 101 and the second branch road 102 respectively.

[0095] The integrated shielding transition section is a continuous shielding structure specifically designed for the branch point C of the Y-type cable. It is made of conductive material compatible with the material of the main shielding structure. The shape of the integrated shielding transition structure is adapted to the shape of the Y-type cable at the branch point C, forming a Y shape. One end is seamlessly connected to the double-layer shielding structure of the main line 103 (including at least one conductive shielding layer and at least one braided shielding layer), and the other two ends are respectively connected to the shielding structures of the first branch 101 and the second branch 102, forming a seamless shielding path.

[0096] The integrated shielding transition section can be firmly connected to the splitter 104 through injection molding, pressing, or welding processes to ensure the structural stability at the bifurcation point C.

[0097] The integrated shielding transition section is integrally formed without splicing gaps, and it is fully wrapped and connected to the shielding structure of the main road 103 and the two branch roads. For example, the braided shielding layers are woven together and the conductive shielding layers are overlapped and pressed together to avoid shielding breakpoints at the bifurcation point C.

[0098] Taking aluminum foil as an example of conductive shielding layer, the integrated shielding transition section is as follows: the aluminum foil of the main path 103 extends to each branch path (including the first branch path 101 and the second branch path 102), forming an aluminum foil overlapping section with the aluminum foil of each branch path; the braided layer of the main path 103 is split and extends to each branch path and wraps around the outside of the aluminum foil of each branch path, forming a braided layer overlapping section with the braided layer of each branch path; the aluminum foil overlapping section and the braided layer overlapping section are fixed by wrapping with conductive tape, so that the main path 103 is connected to the aluminum foil and braided layer of each branch path.

[0099] The bifurcation point of a Y-type cable is a weak point in the shielding structure. By introducing an integrated shielding transition section, the double-layer shielding structure of the main line is extended completely to the two branches, ensuring that the shielding structure is continuous and gapless at the bifurcation point, achieving full coverage protection for the shielding of the main line and the branches.

[0100] In one possible implementation, the first connector 110 is provided with a structural limiting part, which forms a foolproof fit with the adapted mating port.

[0101] The structural limiting part is a specific shape structure designed on the first connector 110, such as a protrusion, a groove, an asymmetrical contour, etc., to constrain the first connector 110 to be inserted smoothly when inserted in a preset direction, that is, to form a foolproof fit. It cannot be inserted in the wrong direction or shape, thereby preventing the first connector 110 from being inserted backward.

[0102] The design of the structural limiting part effectively avoids the first connector 110 being inserted backwards, so that users do not need to repeatedly confirm the direction, improving the connection efficiency of the first connector 110 and making it suitable for blind mating scenarios.

[0103] For the external electronic device 200, provided that the first connector 110 is provided with a structural limiting part, the MUX (Multiplexer) chip that supports reverse insertion of the first connector 110 can be omitted, further reducing hardware costs and peripheral power consumption.

[0104] In one possible implementation, the structural limiting part is at least one of a single-sided flattened structure, a stepped limiting edge, an asymmetric insertion groove, a guide beam, and a press-in limiting mechanism.

[0105] The single-sided flattening structure specifically involves cutting one side of the first connector 110 along the insertion / removal direction to form a flat surface that is different from the other three sides (arc or rectangular). The corresponding mating disconnect has a groove or limiting surface that matches the flat surface. The first connector 110 can only be smoothly inserted when the flat surface is aligned with the groove or limiting surface.

[0106] The stepped limiting edge is the insertion / removal edge of the first connector 110. It is a non-continuous stepped protrusion or recess structure, divided into steps of different heights along the circumferential direction of the edge. For example, the upper edge of the front end is a high step and the lower edge is a low step; or the left side is a double step and the right side is a single step, etc. The corresponding mating port is provided with a matching stepped limiting groove. Insertion can only be successful when the height and position of the stepped limiting edge and the stepped limiting groove are completely aligned.

[0107] The asymmetric insertion slot is a groove structure that is not centrally symmetrical, such as a long strip groove, an L-shaped groove, or an irregular groove that is biased to one side. The corresponding mating port has a protrusion, such as a guide post or a boss, that is completely matched with the asymmetric insertion slot. Because the groove in the asymmetric insertion slot is asymmetric, the first connector 110 can only be inserted into the mating port when the position and shape of the protrusion and the groove are completely aligned. If the direction is wrong, the protrusion and the groove are misaligned and cannot fit together.

[0108] The guide beam is one or more continuous raised ribs, i.e., beams, set on the outer surface of the housing of the first connector 110 along the insertion and removal direction. The cross-section of the beam can be rectangular, triangular, arc-shaped, etc., and the position, number, and shape of the beams are asymmetrically designed. For example, only one beam is set on the left side, or the number of beams set on the left and right sides is different. The inner wall of the corresponding mating port is provided with a guide groove that matches the beam. Only when the beam and the guide groove are completely aligned can the first connector 110 be smoothly inserted into the mating port along the guide groove. If the direction is wrong, the beam interferes with the inner wall of the port and cannot be pushed in.

[0109] The press-in type limiting mechanism consists of a pressable elastic limiting element, such as an elastic protrusion or a press-lock, on the housing of the first connector 110. This elastic limiting element is asymmetrically designed; for example, the press protrusion is only present on the right side. The inner wall of the corresponding mating port has a slot that matches the elastic limiting element, and the slot only corresponds to the position of the elastic limiting element when the insertion direction is correct. During insertion, the elastic limiting element must be pressed to allow the first connector 110 to be inserted into the mating port, and the elastic limiting element can only be engaged in the slot for fixation when the direction is correct. In the incorrect direction, the elastic limiting element cannot be aligned with the slot, and even pressing will not allow for complete insertion or fixation.

[0110] Through the aforementioned structural limiting parts, the first connector 110 and the docking port can be precisely positioned and misaligned in a single direction, preventing the first connector 110 from being inserted backwards when the user uses the cable 10, which would prevent data transmission, such as audio and video data and image data, between the main device 300 and the external electronic device 200.

[0111] This application also provides an electronic device whose docking port is connected to the first connector 110 of the cable 10.

[0112] The electronic device is the aforementioned external electronic device 200, which has data transmission, signal interaction and charging functions, and is equipped with a docking port adapted to the first connector 110 of the cable 10.

[0113] Figure 3 A schematic diagram of the first connector for preventing reverse insertion provided in an embodiment of this application is shown below. Figure 3As shown, a protrusion is provided inside the first connector 110 as a structural limiting part. When the insertion direction makes the protrusion precisely match the corresponding groove of the docking port, the connection can be made smoothly.

[0114] Figure 4 This is a schematic diagram of the structure of the head-mounted display provided in the embodiments of this application, such as... Figure 4 As shown, the head-mounted display 20 includes a display body 21 and a cable 10. The display body 21 has a mating port 22 that mates with a first connector 110 of the cable 10.

[0115] The main display unit 21 is the core functional unit of the head-mounted display 20, including the display panel, processor, sensors, battery, etc. The docking port 22 is integrated into the shell of the main display unit 21, making it convenient for users to plug and unplug cables 10.

[0116] Cable 10 serves as the connection cable for the head-mounted display 20. It can be connected to the display body 21 via the first connector 110. The second connector 120 of cable 10 can be connected to the main device 300, such as a computer or game console. The third connector 130 can be connected to an external power source, thus realizing the dual functions of receiving display data and charging the power source.

[0117] In one possible implementation, since the first connector 110 of the cable 10 is provided with a structural limiting part, the mating port 22 does not include a multiplexer chip, i.e., a MUX chip, for high-speed signals such as high-speed differential signals.

[0118] Figure 5 This is a schematic diagram of the electrical connection between the first connector and the mating port in the absence of a MUX chip, as provided in this application embodiment. Since the MUX chip is omitted, the terminals of the mating port 22 of the head-mounted display are directly connected to the corresponding terminals of the first connector 110, as shown below. Figure 5As shown, the docking port 22 of the head-mounted display includes two functional modules: a video receiving module and a USB driver module. Specifically, the TX1 and RX1 terminals of the first connector 110 are connected to the SSTX and SSRX terminals of the USB driver module to transmit USB 3.x high-speed data, such as device configuration information of the head-mounted display, firmware upgrade data, and interactive data from external electronic devices. The TX1 and RX1 terminals of the first connector 110 are also connected to the DP0 and DP1 terminals of the video receiving module to transmit DisplayPort video differential signals. The TX2, RX2, SUB1, and SBU2 terminals of the first connector 110 are connected to the DP2, DP3, AUXp, and AUXn terminals of the video receiving module to transmit DisplayPort video differential signals and DisplayPort auxiliary control signals, including video resolution, refresh rate negotiation, display status feedback, and audio synchronization signals. The CC1 and CC2 terminals of the first connector 110 are connected to the video receiver to perform basic interface identification, mode confirmation, and video function enabling functions.

[0119] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A cable, characterized in that, include: The cable body has a splitter integrated at the branch point to separate the main path of the cable body into a first branch and a second branch that are independent of each other. A first connector is located at the end of the main road and is configured to connect to an external electronic device; the end is the end furthest from the bifurcation point. The second connector is located at the end of the first branch and is configured to establish a data signal link with the master device; A third connector is located at the end of the second branch, and the third connector is configured to connect to an external power source to provide power to the external electronic device. The power terminals of the second connector are electrically isolated from the power terminals of the first connector; the power terminals of the third connector are electrically connected to the power terminals of the first connector, and the configuration terminals of the third connector are connected to ground via pull-down resistors; the ground terminals of the first connector, the second connector, and the third connector are interconnected; the data terminals of the first connector are electrically connected to the data terminals of the second connector, so that the external electronic device and the host device can transmit data through the data signal link.

2. The cable according to claim 1, characterized in that, At least one of the first connector, the second connector, and the third connector is a Universal Serial Bus (USB) interface.

3. The cable according to claim 2, characterized in that, At least one of the first connector, the second connector, and the third connector is a USB Type-C connector.

4. The cable according to claim 1, characterized in that, The power terminals of the third connector are electrically connected to the power terminals of the first connector via a shielded conductive path.

5. The cable according to claim 1, characterized in that, The first connector is provided with a structural limiting part, which forms a foolproof fit with the adapted docking port.

6. The cable according to claim 5, characterized in that, The structural limiting part is at least one of the following: a single-sided flattened structure, a stepped limiting edge, an asymmetric insertion groove, a guide beam, and a press-in limiting mechanism.

7. The cable according to any one of claims 1-6, characterized in that, The data terminals of the first connector and the data terminals of the second connector are connected through at least one pair of high-speed differential lines; the at least one pair of high-speed differential lines are controlled by a differential impedance of 90Ω±10%.

8. The cable according to any one of claims 1-6, characterized in that, The cable body includes a shielding structure extending along its length, the shielding structure including at least one conductive shielding layer and at least one braided shielding layer.

9. The cable according to claim 8, characterized in that, The shielding structure has an integrated shielding transition section at the bifurcation point; the integrated shielding transition section is fixedly connected to the splitter and seamlessly connected, and is used to transition the shielding structure of the main road to the shielding structure of the first branch road and the second branch road respectively.

10. The cable according to any one of claims 1-6, characterized in that, The cable does not include a control chip or a switching assembly used to switch the on / off state of the circuit.

11. A head-mounted display, characterized in that, It includes a display body and a cable as described in any one of claims 1-10; the display body has a mating port that mates with a first connector of the cable.

12. The head-mounted display according to claim 11, characterized in that, The docking port does not include a multiplexer chip for high-speed signal switching.

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