Protection circuit and ar/vr headset

Abstract

The present application discloses a protection circuit and an AR / VR head-mounted device. The protection circuit is disposed at a power input interface, and includes: an overcurrent protection sub-circuit, a primary overvoltage protection sub-circuit, a plurality of voltage conversion sub-circuits, and a plurality of secondary overvoltage protection sub-circuits. The power input interface, the overcurrent protection sub-circuit and the primary overvoltage protection sub-circuit are successively connected. The primary overvoltage protection sub-circuit is connected to the respective voltage conversion sub-circuits. Each voltage conversion sub-circuit is successively connected with the corresponding secondary overvoltage protection sub-circuit. The primary overvoltage protection sub-circuit and the secondary overvoltage protection sub-circuits are configured to determine whether an overvoltage occurs and convert the overvoltage into a current to be released to the overcurrent protection sub-circuit. The overcurrent protection sub-circuit is configured to determine whether an overcurrent occurs and perform current-limiting control.

Description

technical field [0001] The present disclosure generally relates to the security field, and in particular relates to protection circuits and AR / VR headsets. Background technique [0002] At present, most of the electronic consumer products do not design circuit safety. Once the circuit fails, although there are some conventional protection circuits, such as fuses and pressure-sensitive circuits, when the circuit fails, it can still be protected. The released energy will burn out the protection circuit components, such as the common "fuse blown, varistor breakdown and burnt", in severe cases, it will cause local burnt of the circuit board, generate a lot of smoke and smell, and bring discomfort to the user experience. The above-mentioned protection methods for conventional electrical appliances can meet the protection of CPU, power supply IC, etc., but for AR and VR head-mounted devices, due to contact with the human body and on the head, the safety requirements will be more s...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the electronic consumer products do not design circuit safety. Once the circuit fails, although there are some conventional protection circuits, such as fuses and pressure-sensitive circuits, when the circuit fails, it can still be protected. The released energy will burn out the protection circuit components, such as the common "fuse blown, varistor breakdown and burnt", in severe cases, it will cause local burnt of the circuit board, generate a lot of smoke and smell, and bring discomfort to users

The above-mentioned protection methods for conventional electrical appliances can meet the protection of CPU, power supply IC, etc., but for AR and VR head-mounted devices, due to contact with the human body and on the head, the safety requirements will be more stringent, so the above-mentioned protection methods Will not work with AR, VR headsets

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