Mini projector and charging and discharging control method thereof

Abstract

A mini projector comprises a first port, a second port, a battery, a switching circuit, a charging control circuit, a control unit, a host system and a load protection module. In a projection mode, the first port is connected with an adapter to charge the battery via the charging control circuit, and the control unit controls the host system to provide a first charging signal for the second port via the load protection module; and in a fast charging mode, the first charging port is connected with the adapter to charge the battery via the charging control circuit, the control circuit controls the first port to provide a second charging signal for the second port via the switching circuit, and the load protection module disconnects electrical connection between the first and second ports andthe host system to prevent the voltages of the first and second ports from returning to the host system; and the charging speed of an external device connected to the second port in the fast chargingmode is greater than that of the same in the projection mode.

Description

technical field [0001] The invention relates to a miniature projector, in particular to a portable miniature projector and a charging and discharging control method thereof. Background technique [0002] Most of the micro-projectors currently on the market, especially portable micro-projectors (such as small and hand-held micro-projectors), use small-capacity batteries, and do not support the charging of Type-C and other types of bidirectional ports. Input, also does not support fast charging mode. In addition, the input ports (such as USB ports) of existing micro-projectors usually only provide a small charging current, which cannot provide enough current for charging connected external devices (such as mobile phones and other input devices), so it needs to be improved. In addition, some output ports (such as USB Type-A ports) of this micro projector do not have anti-backflow protection. Although the conventional output port is generally 5V, in the fast charging mode, the ...

AI Technical Summary

Problems solved by technology

[0002] Most of the micro-projectors currently on the market, especially portable micro-projectors (such as small and hand-held micro-projectors), use small-capacity batteries, and do not support the charging of Type-C and other types of bidirectional ports. input, does not support fast charge mode

In addition, the input ports (such as USB ports) of existing micro-projectors usually only provide a small charging current, which cannot provide enough current for charging connected external devices (such as input devices such as mobile phones). It is necessary to improve

In addition, some output ports (such as USB Type-A ports) of this micro projector do not have anti-backflow protection. Although the conventional output port is generally 5V, in the fast charging mode, the voltage of the output port may reach 9V or 12V Higher voltages such as the above, the higher voltage may be poured into the host system and cause damage to the host system, it is necessary to improve

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