Title:
ELECTRIC SHOCK PROTECTION SYSTEM AND PROJECTION DEVICE, AND ELECTRIC SHOCK PROTECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/037970
Kind Code:
A1
Abstract:
The present invention provides an electric shock protection system and a projection device using same, and an electric shock protection method. The electric shock protection system comprises a housing having an accommodation space, an upper cover covering the housing, a power supply board disposed in the accommodation space and having a switching circuit, a main board having a control unit, and a distance meter fixed in the housing. The distance meter measures the distance between the distance meter and the upper cover and feeds back the measure value to the control unit; when detecting that the distance between the distance meter and the upper cover changes, the control unit controls the switching circuit to be turned off. The safety performance of a product can be effectively improved, and an electric shock hidden danger during testing or mounting can be prevented.
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Inventors:
XIONG ZAIXIANG (CN)
LI YI (CN)
LI YI (CN)
Application Number:
PCT/CN2019/076619
Publication Date:
February 27, 2020
Filing Date:
March 01, 2019
Export Citation:
Assignee:
APPOTRONICS CORP LTD (CN)
International Classes:
H02H5/00
Foreign References:
| CN101246331A | 2008-08-20 | |||
| CN2743734Y | 2005-11-30 | |||
| CN101010846A | 2007-08-01 | |||
| JP4553353B2 | 2010-09-29 |
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