Title:
HDMI IDENTIFICATION PORT PROTECTION CIRCUIT AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/101307
Kind Code:
A1
Abstract:
An HDMI identification port protection circuit and device, the protection circuit comprising: a first switch circuit (11) and a second switch circuit (12), the first end of the first switch circuit being connected to an HDMI power supply port (13), the other end being connected to the second switch circuit; the first end of the second switch circuit is connected to the first switch circuit, the other end being connected to the HDMI identification port (14); the first switch circuit isolates the voltage loaded by the HDMI power supply port, and drives the conduction of the second switch circuit, the standby voltage being used as the identification voltage of the HDMI identification port. Over-voltage protection of the HDMI identification port is implemented by means of the protection circuit, preventing device damage caused by excessively high HDMI signal source voltage, and reducing after-sales costs.
Inventors:
DUAN WEI (CN)
Application Number:
PCT/CN2016/088429
Publication Date:
June 22, 2017
Filing Date:
July 04, 2016
Export Citation:
Assignee:
LE HOLDINGS BEIJING CO LTD (CN)
LE SHI ZHI XIN ELECTRONIC TECH (TIANJIN) LTD (CN)
LE SHI ZHI XIN ELECTRONIC TECH (TIANJIN) LTD (CN)
International Classes:
H04N11/24
Foreign References:
| CN204559104U | 2015-08-12 | |||
| CN203135390U | 2013-08-14 | |||
| US20100128178A1 | 2010-05-27 |
Attorney, Agent or Firm:
BEIJING HEADSTAY INTELLECTUAL PROPERTY INC. (CN)
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