Title:
FLASH SWITCH CONTROL SYSTEM AND INPUT FLASH DETECTION CIRCUIT THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/211114
Kind Code:
A1
Abstract:
An input flash detection circuit and a flash switch control system, the input flash detection circuit comprising a zero-crossing comparison module, an output resistor, a discharge capacitor, an isolation optocoupler and a switch detection module; an output end of the zero-crossing comparison module is connected to a first end of the output resistor and a cathode input end of the isolation optocoupler respectively; a second end of the output resistor is connected to a first end of the discharge capacitor and an anode input end of the isolation optocoupler respectively; a second end of the discharge capacitor is connected to a second input end of the zero-crossing comparison module; and an input end of the switch detection module is connected to an output end of the isolation optocoupler and is used for outputting an on-off detection signal of the isolation optocoupler; the connection of the isolation optocoupler indicates that a direct current input signal flashes off; and the connection interval time of the isolation optocoupler being greater than a signal period of an alternating current input signal indicates that the alternating current input signal flashes off. The present application effectively reduces the power consumption of a system, and increases product competitiveness and the economic benefits.
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Inventors:
SUN SHENGLI (CN)
WEI WEI (CN)
JIANG ZHAONING (CN)
LIU DAPING (CN)
WEI WEI (CN)
JIANG ZHAONING (CN)
LIU DAPING (CN)
Application Number:
PCT/CN2019/084484
Publication Date:
October 22, 2020
Filing Date:
April 26, 2019
Export Citation:
Assignee:
QINGDAO YEELINK INFORMATION TECH CO LTD (CN)
International Classes:
G01R31/327; H01H9/56
Foreign References:
| CN102435828A | 2012-05-02 | |||
| CN103743940A | 2014-04-23 | |||
| CN102346216A | 2012-02-08 | |||
| CN107942736A | 2018-04-20 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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