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Title:
OVERVOLTAGE PROTECTION CIRCUIT AND PROJECTOR
Document Type and Number:
WIPO Patent Application WO/2019/095536
Kind Code:
A1
Abstract:
An overvoltage protection circuit and a projector, relating to the technical field of projection devices, and the circuit comprising: a first detection circuit (10), a switch circuit (20), and an action and delay recovery circuit (30). The first detection circuit (10) is used for detecting an output voltage, and when the output voltage is higher than a preset overvoltage value, the switch circuit (20) is turned on, so that the action and delay recovery circuit (30) triggers an overvoltage protection action. After a preset delay period, the first detection circuit (10) restarts detecting the output voltage of the power supply module, so as to perform the overvoltage protection again. The circuit composed of discrete devices achieves the overvoltage protection function and the automatic recovery function after the action. The circuit is simple in structure and has a high cost performance ratio. The circuit is modular in design, being applicable to most power supply circuits, having good universality, and having general applicability.

Inventors:
HUANG, Guosheng (20F-22F, High-Tech Zone Union TowerNo.63, Xuefu Road, Yuehai Street, Nanshan Distric, Shenzhen Guangdong 0, 518000, CN)
LI, Yi (20F-22F, High-Tech Zone Union TowerNo.63, Xuefu Road, Yuehai Street, Nanshan Distric, Shenzhen Guangdong 0, 518000, CN)
Application Number:
CN2018/071444
Publication Date:
May 23, 2019
Filing Date:
January 04, 2018
Export Citation:
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Assignee:
APPOTRONICS CORPORATION LIMITED (20F-22F, High-Tech Zone Union TowerNo.63, Xuefu Road, Yuehai Street, Nanshan Distric, Shenzhen Guangdong 0, 518000, CN)
International Classes:
H02H9/04; H02H1/00; H04N9/31
Foreign References:
CN206442106U2017-08-25
CN102035169A2011-04-27
CN204333904U2015-05-13
CN206542178U2017-10-03
US20120293899A12012-11-22
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